CN118368402A - Display apparatus and control method of display apparatus - Google Patents

Abstract

The embodiment of the application provides display equipment and a control method of the display equipment, relates to the technical field of optical display, and can avoid the problem of control confusion of the display equipment. The control method of the display device includes: acquiring data of a plurality of viewers watching a display device; determining a priority level for each of the plurality of viewers based on the data for each of the plurality of viewers; determining M appointed viewers with high priority levels from the plurality of viewers based on the priority levels of the plurality of viewers, wherein M is a positive integer and is less than or equal to the maximum number of viewers supported by the display device; turning on a backlight unit corresponding to a left eye of each of the plurality of backlight units for designating a viewer, and displaying a left-eye image based on the backlight unit corresponding to the left eye; each of the plurality of backlight units is turned on to designate a backlight unit corresponding to a right eye of the viewer, and a right-eye image is displayed based on the backlight unit corresponding to the right eye.

Description

Display device and control method of display device

Technical Field

The present application relates to the field of optical display technology, and in particular to a display device and a control method for the display device.

Background technique

The display device is used to display images, and the display device provides visual experience to the viewer who is viewing the display device. Among them, stereoscopic images can better present the real world, so the display device is constantly developing in the direction of displaying stereoscopic images. The display device displays stereoscopic images based on the visual shift characteristic. For example, when two plane images with different depth information are projected to the left eye and the right eye of the viewer respectively, the viewer's brain interprets the two plane images with different depth information, and then can view the stereoscopic image.

At present, when a display device displays a stereoscopic image, the display device usually needs to display a left-eye image to the left eye of the viewer and a right-eye image to the right eye of the viewer, so that the viewer can view the stereoscopic image. When multiple viewers view the same display device, the display device needs to display the left-eye image and the right-eye image to each of the multiple viewers. However, when the display device displays a stereoscopic image to multiple viewers, there is often a problem of control confusion, which affects the effect of the display device displaying the stereoscopic image.

Summary of the invention

Embodiments of the present application provide a display device and a method for controlling the display device, which can avoid the problem of chaotic control of the display device.

In a first aspect, a control method for a display device is provided, wherein the display device includes a backlight module, and the backlight module includes a plurality of backlight units; the control method for the display device includes: obtaining data of a plurality of viewers viewing the display device; determining a priority level of each of the plurality of viewers according to the data of each of the plurality of viewers; the priority level of the viewer is used to characterize the priority of displaying an image to the viewer; based on the priority levels of the plurality of viewers, determining M designated viewers with high priority levels from the plurality of viewers, where M is a positive integer and M is less than or equal to the maximum number of viewers supported by the display device; turning on the backlight unit corresponding to the left eye of each designated viewer in the plurality of backlight units, and displaying a left eye image based on the backlight unit corresponding to the left eye; turning on the backlight unit corresponding to the right eye of each designated viewer in the plurality of backlight units, and displaying a right eye image based on the backlight unit corresponding to the right eye. In the control method for the display device, since the display device determines the priority level of each of the plurality of viewers according to the data of each of the plurality of viewers, M designated viewers with high priority levels are determined from the plurality of viewers. M is less than or equal to the maximum number of viewers supported by the display device. Therefore, when the number of viewers viewing the display device is greater than the maximum number of viewers supported by the display device, the display device selects M designated viewers with high priority levels from multiple viewers, and the display device displays stereoscopic images to the designated viewers, thereby avoiding the problem of control confusion caused by the number of viewers of the display device being greater than the maximum number of viewers supported by the display device.

Optionally, the viewer data includes one or more of the following: viewer face information, viewer location information, viewer start time of viewing the display device, and viewer gesture information. In this optional manner, the display device provides several ways to determine the priority level of the viewer, making the control method of the display device more flexible.

Optionally, the viewer's data includes the viewer's facial information; according to the facial information of each viewer among the multiple viewers, the priority level of each viewer is determined, including: obtaining multiple preset facial information; wherein each preset facial information among the multiple preset facial information is correspondingly set with a priority level; for any viewer, the viewer's facial information is matched with each preset facial information; according to the priority level of the preset facial information matched by the viewer, the priority level of the viewer is determined. In this optional method, the priority level of each viewer is determined based on the facial information of the display device. Since it is only necessary to match the viewer's facial information with the preset facial information, the priority level of the preset facial information matched with the viewer is determined as the priority level of the viewer, and the viewer with a high priority level is the designated viewer, so this solution can directly control the number of designated viewers by setting the number of preset facial information, and the control method is simple and has high accuracy.

Optionally, the priority levels set corresponding to any two preset facial information are the same or different.

Optionally, the viewer's data includes the viewer's location information; the priority level of each viewer is determined based on the location information of each viewer among the multiple viewers, including: for any viewer, the viewing area where the viewer is located is determined based on the viewer's location information; wherein the viewing area is included in multiple viewing areas, the multiple viewing areas are obtained by dividing the display area corresponding to the display device, and each viewing area in the multiple viewing areas is correspondingly set with a priority level; the priority level of the viewer is determined based on the priority level of the viewing area where the viewer is located. In this optional method, the priority level of each viewer is determined based on the viewer's location information. Since the viewing area where the viewer is located is determined based on the viewer's location information, the priority level of the viewing area is set, and the priority level of the viewer is determined based on the priority level of the viewing area where the viewer is located, the display device can customize the viewing area with the highest priority level, thereby improving the adaptability of the display device.

Optionally, the priority level of a viewing area at the center of the display area is higher than the priority level of a viewing area at other locations of the display area except the center.

Optionally, the viewer data includes the viewer's position information; determining the priority level of each viewer based on the position information of each viewer among the multiple viewers includes: determining the distance between each viewer and the reference point based on the position information of each viewer among the multiple viewers and the position information of the reference point; determining the priority level of each viewer based on the distance between each viewer and the reference point, wherein the viewer's priority level is negatively correlated with the distance between the viewer and the reference point. In this optional manner, since the viewer's priority level is determined based on the viewer's position information and the distance between the reference point, wherein the reference point can be, for example, the best viewpoint, the closer the distance between the viewer and the reference point is, the closer the viewer is to the best viewpoint, so that the display device has a better effect of displaying stereoscopic images to the viewer.

Optionally, the viewer data includes the start time of the viewer watching the display device; determining the priority level of each viewer according to the start time of each viewer among multiple viewers watching the display device, including: setting a sequence value for each viewer in order from early to late according to the start time of each viewer watching the display device; determining the priority level of each viewer according to the sequence value of each viewer, wherein the priority level of the viewer is negatively correlated with the sequence value of the viewer.

Optionally, the viewer data includes the viewer's gesture information; determining the priority level of each viewer based on the gesture information of each viewer among multiple viewers, including: obtaining preset gesture information; matching the gesture information of each viewer among the multiple viewers with the preset gesture information to determine the priority level of each viewer, wherein the priority level of a viewer who successfully matches is higher than the priority level of a viewer who fails to match.

Optionally, the display device further includes an optical lens, and the optical lens has a field of view angle; the maximum number of viewers is positively correlated with the field of view angle of the optical lens; and the maximum number of viewers is positively correlated with the number of the plurality of backlight units.

Optionally, turning on the backlight unit corresponding to the left eye of a designated viewer among multiple backlight units includes: turning on the backlight unit corresponding to the left eye of each designated viewer among the multiple backlight units in sequence according to a preset order; turning on the backlight unit corresponding to the right eye of a designated viewer among the multiple backlight units includes: turning on the backlight unit corresponding to the right eye of each designated viewer among the multiple backlight units in sequence according to a preset order.

Optionally, the viewer's data includes the start time of the viewer viewing the display device; the preset order is the order from early to late according to the start time of viewing the display device.

In a second aspect, a computer-readable storage medium is provided, comprising computer instructions. When the computer instructions are executed on a computer, the computer executes the method for controlling a display device as described in any one of the first aspects above.

In a third aspect, a computer program product is provided. When the computer program product is run on a computer, the computer executes the method for controlling a display device as described in any one of the first aspects above.

In a fourth aspect, a display device is provided, which includes an acquisition module, a processing module, a backlight module and a display module, wherein the backlight module includes multiple backlight units; the acquisition module is used to acquire data of multiple viewers viewing the display device; the processing module is used to determine the priority level of each of the multiple viewers based on the data of each of the multiple viewers acquired by the acquisition module; the priority level of the viewer is used to characterize the priority of displaying an image to the viewer; the processing module is also used to determine M designated viewers with high priority levels from the multiple viewers based on the priority levels of the multiple viewers, where M is a positive integer and is less than or equal to the maximum number of viewers supported by the display device; the backlight module is used to turn on the backlight unit corresponding to the left eye of each designated viewer in the multiple backlight units; the display module is used to display the left-eye image based on the backlight unit corresponding to the left eye; the backlight module is also used to turn on the backlight unit corresponding to the right eye of each designated viewer in the multiple backlight units; the display module is also used to display the right-eye image based on the backlight unit corresponding to the right eye.

Optionally, the viewer's data includes one or more of the following: viewer's facial information, viewer's location information, the start time of the viewer watching the display device, and viewer's gesture information.

Optionally, the acquisition module is also used to acquire multiple preset facial information; wherein each of the multiple preset facial information is correspondingly set with a priority level; the processing module is also used to match the viewer's facial information with each preset facial information; the processing module is also used to determine the viewer's priority level based on the priority level of the preset facial information matched by the viewer.

Optionally, the priority levels set corresponding to any two preset facial information are the same or different.

Optionally, the viewer's data includes the viewer's location information; the processing module is further used to determine a viewing area where the viewer is located based on the viewer's location information; wherein the viewing area includes multiple viewing areas, and the multiple viewing areas are obtained by dividing the display area corresponding to the display device, and each viewing area in the multiple viewing areas is correspondingly set with a priority level; the processing module is further used to determine the viewer's priority level based on the priority level of the viewing area where the viewer is located.

Optionally, the priority level of a viewing area at the center of the display area is higher than the priority level of a viewing area at other locations of the display area except the center.

Optionally, the viewer data includes the viewer's location information; the processing module is further used to determine the distance between each viewer and a reference point based on the location information of each viewer among multiple viewers and the location information of the reference point; the processing module is further used to determine the priority level of each viewer based on the distance between each viewer and the reference point, wherein the viewer's priority level is negatively correlated with the distance between the viewer and the reference point.

Optionally, the viewer's data includes the start time of the viewer watching the display device; the processing module is further used to set a sequence value for each viewer according to the order of the start time of each viewer watching the display device from early to late; the processing module is further used to determine the priority level of each viewer according to the sequence value of each viewer, wherein the priority level of the viewer is negatively correlated with the sequence value of the viewer.

Optionally, the viewer data includes the viewer's gesture information; the acquisition module is also used to obtain preset gesture information; the processing module is also used to match the gesture information of each viewer among multiple viewers with the preset gesture information, and determine the priority level of each viewer, wherein the priority level of a viewer who successfully matches is higher than the priority level of a viewer who fails to match.

Optionally, the display device further includes an optical module, and the optical module has a field of view angle; the maximum number of viewers is positively correlated with the field of view angle of the optical module; and the maximum number of viewers is positively correlated with the number of the plurality of backlight units.

Optionally, the backlight module is further used to sequentially turn on the backlight unit corresponding to the left eye of each designated viewer among the multiple backlight units in a preset order; the backlight module is further used to sequentially turn on the backlight unit corresponding to the right eye of each designated viewer among the multiple backlight units in a preset order.

Optionally, the viewer's data includes the start time of the viewer viewing the display device; the preset order is the order from early to late according to the start time of viewing the display device.

In a fifth aspect, a display device is provided, which includes a face detector, a processor, a backlight module and a display panel, wherein the backlight module includes multiple backlight units; the face detector is used to obtain data of multiple viewers viewing the display device; the processor is used to determine the priority level of each of the multiple viewers based on the data of each of the multiple viewers obtained by the face detector; the priority level of the viewer is used to characterize the priority of displaying an image to the viewer; the processor is also used to determine M designated viewers with high priority levels from the multiple viewers based on the priority levels of the multiple viewers, M is a positive integer, and M is less than or equal to the maximum number of viewers supported by the display device; the backlight module is used to turn on the backlight unit corresponding to the left eye of each designated viewer in the multiple backlight units; the display panel is used to display the left eye image based on the backlight unit corresponding to the left eye; the backlight module is also used to turn on the backlight unit corresponding to the right eye of each designated viewer in the multiple backlight units; the display panel is also used to display the right eye image based on the backlight unit corresponding to the right eye.

Optionally, the viewer's data includes one or more of the following: viewer's facial information, viewer's location information, the start time of the viewer watching the display device, and viewer's gesture information.

Optionally, the face detector is also used to obtain multiple preset face information; wherein each of the multiple preset face information is correspondingly set with a priority level; the processor is also used to match the viewer's face information with each preset face information; the processor is also used to determine the viewer's priority level based on the priority level of the preset face information matched by the viewer.

Optionally, the priority levels set corresponding to any two preset facial information are the same or different.

Optionally, the viewer's data includes the viewer's location information; the processor is further used to determine a viewing area where the viewer is located based on the viewer's location information; wherein the viewing area includes multiple viewing areas, and the multiple viewing areas are obtained by dividing the display area corresponding to the display device, and each of the multiple viewing areas is correspondingly set with a priority level; the processor is further used to determine the viewer's priority level based on the priority level of the viewing area where the viewer is located.

Optionally, the priority level of a viewing area at the center of the display area is higher than the priority level of a viewing area at other locations of the display area except the center.

Optionally, the viewer data includes the viewer's location information; the processor is further used to determine the distance between each viewer and a reference point based on the location information of each viewer among multiple viewers and the location information of the reference point; the processor is further used to determine the priority level of each viewer based on the distance between each viewer and the reference point, wherein the priority level of the viewer is negatively correlated with the distance between the viewer and the reference point.

Optionally, the viewer's data includes the start time of the viewer watching the display device; the processor is further used to set a sequence value for each viewer according to the order of the start time of each viewer watching the display device from early to late; the processor is further used to determine the priority level of each viewer according to the sequence value of each viewer, wherein the priority level of the viewer is negatively correlated with the sequence value of the viewer.

Optionally, the viewer data includes the viewer's gesture information; the face detector is also used to obtain preset gesture information; the processor is also used to match the gesture information of each viewer among multiple viewers with the preset gesture information, and determine the priority level of each viewer, wherein the priority level of a viewer who successfully matches is higher than the priority level of a viewer who fails to match.

Optionally, the display device further includes an optical lens, and the optical lens has a field of view angle; the maximum number of viewers is positively correlated with the field of view angle of the optical lens; and the maximum number of viewers is positively correlated with the number of the plurality of backlight units.

Optionally, the backlight module is further used to sequentially turn on the backlight unit corresponding to the left eye of each designated viewer among the multiple backlight units in a preset order; the backlight module is further used to sequentially turn on the backlight unit corresponding to the right eye of each designated viewer among the multiple backlight units in a preset order.

Optionally, the viewer's data includes the start time of the viewer viewing the display device; the preset order is the order from early to late according to the start time of viewing the display device.

Among them, the technical effects brought about by any possible implementation method of the second to fifth aspects can refer to the technical effects brought about by any different implementation method of the above-mentioned first aspect, and will not be repeated here.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of a display device provided in an embodiment of the present application;

FIG2 is a schematic diagram of the structure of a backlight module provided in an embodiment of the present application;

FIG3 is a schematic diagram of the structure of a light board in a backlight module provided in an embodiment of the present application;

FIG4 is a schematic structural diagram of a display device provided by another embodiment of the present application;

FIG5 is a display schematic diagram 1 of a display device provided by another embodiment of the present application;

FIG6 is a second display schematic diagram of a display device provided by another embodiment of the present application;

FIG7 is a schematic diagram of the structure of a display device provided in yet another embodiment of the present application;

FIG8 is a schematic structural diagram of a display device provided in yet another embodiment of the present application;

FIG9 is a flow chart of a method for controlling a display device provided by another embodiment of the present application;

FIG10 is a flow chart of a method for controlling a display device provided in yet another embodiment of the present application;

FIG11 is a schematic diagram of preset face information in a display device provided in yet another embodiment of the present application;

FIG12 is a flow chart of a method for controlling a display device provided in yet another embodiment of the present application;

FIG13 is a schematic diagram showing the division of a display area corresponding to a display device provided in yet another embodiment of the present application;

FIG14 is a flow chart of a method for controlling a display device provided by another embodiment of the present application;

FIG15 is a third display schematic diagram of a display device provided by another embodiment of the present application;

FIG16 is a schematic diagram showing the division of a display area corresponding to a display device provided in another embodiment of the present application;

FIG17 is a flow chart of a method for controlling a display device provided in yet another embodiment of the present application;

FIG18 is a flow chart of a method for controlling a display device provided in yet another embodiment of the present application;

FIG. 19 is a schematic diagram of the structure of a display device provided in another embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

Unless otherwise defined, all scientific and technological terms used herein have the same meaning as those known to those of ordinary skill in the art. In the present application, "at least one" refers to one or more, and "multiple" refers to two or more. "And/or" describes the association relationship of associated objects, indicating that three relationships may exist, for example, A and/or B, which may represent: A exists alone, A and B exist at the same time, and B exists alone, wherein A and B may be singular or plural. The character "/" generally indicates that the associated objects before and after are a kind of "or" relationship. "At least one of the following (individuals)" or its similar expressions refers to any combination of these items, including any combination of single items (individuals) or plural items (individuals). For example, at least one of a, b or c (individuals) may represent: a, b, c, a and b, a and c, b and c or a, b and c, wherein a, b and c may be single or multiple. In addition, in the embodiments of the present application, the words "first", "second" and the like do not limit the quantity and order.

In addition, in the present application, directional terms such as "upper" and "lower" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they can change accordingly according to the changes in the orientation of the components in the drawings.

It should be noted that, in this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

The technical solution in this application will be described below in conjunction with the accompanying drawings.

FIG1 is a schematic diagram of the structure of a display device 10 provided in an embodiment of the present application. The display device 10 may be a large-screen display device such as an advertising screen (billboard), a display, a 3D display, a television (such as a smart screen), a laptop computer, a tablet computer, etc. Optionally, in some scenarios, the display device 10 may be a device such as a mobile phone, an e-reader, or a wearable device. Optionally, in other scenarios, the display device 10 may also be an in-vehicle display device, such as a head up display (HUD), a co-pilot display, a seat back display, and the like. Among them, the display device 10 shown in FIG1 is illustrated by taking a display as an example.

The display device 10 may include a housing 11 and a display panel 22. Of course, FIG1 only shows an example of the display device 10, and the example does not limit the structure of the display device 10. In other examples, the display device 10 may also include more structures or components.

The housing 11 may include a frame and a back cover. The frame may be arranged around the periphery of the back cover. The housing 11 may include, for example, a middle frame of the display device 10. In one example, the middle frame of the display device 10 may be accommodated within the inner periphery of the frame. In another example, the middle frame of the display device 10 may serve as the frame of the housing 11.

The display panel 22 is used to provide a display function. The user can watch media resources such as images and videos displayed by the display panel 22. The display panel 22 can be mounted on the housing 11. The periphery of the display panel 22 can be against the inner edge of the frame. The frame can fix the display panel 22 on the housing 11. The display panel 22 and the back cover can be installed on both sides of the frame respectively, so that the housing 11 can provide mechanical protection for the devices inside the display device, especially the devices on the display panel 22. The display panel 22 can be fixed on the middle frame of the display device 10, for example.

The display device 10 is further provided with a backlight module. Exemplarily, the backlight module is provided on a side of the display panel 22 close to a rear cover of the display device 10 .

In conjunction with FIG. 2 , the backlight module 21 and the display panel 22 in the display device 10 provided in the embodiment of the present application are described below. FIG. 2 shows the backlight module 21 and the display panel 22 arranged on the light-emitting side of the backlight module 21. The backlight module 21 may include a stacked back plate 211, a flat plate 212, a light board 213, a diffuser plate 214, an optical film 215 and other components. Of course, FIG. 2 above only provides an exemplary general structure of a backlight module 21. In some examples, the backlight module 21 may also include more or fewer components than the above.

The back plate 211 may have functions such as supporting the display device 10 and providing mechanical protection for electronic components in the display device 10. The material of the back plate 211 may be a material that meets the mechanical strength requirements and can play a supporting role. For example, the back plate 211 may be a metal material such as stainless steel, aluminum alloy, zinc alloy, titanium alloy, etc., or the back plate 211 may be a non-metallic material such as resin.

The flat plate 212 may be located between the light board 213 and the back plate 211. The flat plate 212 may be used to provide support for the light board 213 to maintain or ensure the flatness of the light board 213. The flat plate 212 may be a conductive material with a certain rigidity. For example, the flat plate 212 may be an aluminum plate. The flat plate 212 may be fixed to the back plate 211 by mechanical connectors such as double-sided adhesive or foam.

The optical film 215 can change the frequency of the light from the light board 213. The optical film 215 can include quantum dots. For example, the light board 213 can emit high-energy blue light; the blue light can excite the quantum dots encapsulated in the optical film 215, so that the quantum dots can convert the blue light emitted by the light board 213 into white light (the quantum dot can be a nano-scale semiconductor; by applying a certain electric field or light pressure to the quantum dot, the quantum dot can emit light of a specific frequency). The quantum dot can be formed, for example, from a chemical coating, a phosphor, etc.

In other examples, the diffuser 214 may include quantum dots, so that the diffuser 214 may change the frequency of the light from the light board 213. In some embodiments, the diffuser 214 may be integrally formed with the optical film 215. The light emitted by the light board 213 may be directly emitted into the diffuser 214 after only light mixing processing without other optical processing.

Specifically, the light emitted by the light board 213 is transmitted to the display panel 22 through the diffuser 214 and the optical film 215. The display panel 22 may be a liquid crystal display (LCD), and the display panel 22 may include a liquid crystal layer and a filter layer. The display panel 22 is also referred to as a liquid crystal panel. The light intensity of the white light passing through the liquid crystal unit is controlled by controlling the liquid crystal unit to be turned on or off. By turning on the liquid crystal unit, the white light passing through the liquid crystal unit can illuminate the filter layer. The filter layer may include a red light filter, a green light filter, and a blue light filter. The red light filter may be used to convert white light into red light. The green light filter may be used to convert white light into green light. The blue light filter may be used to convert white light into blue light. Thus, the display device 10 may be controlled to emit light of multiple colors to display a color pattern. A predetermined number of liquid crystal units form a pixel, and a pixel value can be assigned to each pixel so that the current pixel displays a different color, wherein the pixel value can be a grayscale value of the current pixel and/or a chromaticity value of the red, green, and blue (RGB) colors of the current pixel.

Exemplarily, as shown in Fig. 3, the light board 213 specifically includes a plurality of light-emitting devices L arranged in an array. The light-emitting device L can be a chip with a light-emitting function, or the light-emitting device L includes a light-emitting diode (LED), a sub-millimeter light-emitting diode (Mini-LED) and a micron light-emitting diode (MicroLed).

In some embodiments, the light board 213 includes a plurality of backlight units, and one backlight unit includes one or more light-emitting devices L. The display device 10 further includes a processor, and the backlight unit can receive a backlight control signal sent by the processor of the display device 10, and the backlight control signal includes a plurality of control signals, and one control signal is used to control the turning on and off of one backlight unit. For example, one backlight unit includes one light-emitting device L, and the control signal received by the one backlight unit is used to control the turning on and off of the one light-emitting device L. For another example, one backlight unit includes a plurality of light-emitting devices L, and the control signal received by the one backlight unit is used to control the turning on and off of the plurality of light-emitting devices L. Exemplarily, the plurality of light-emitting devices L included in one backlight unit may be, for example, a row of light-emitting devices L, or a column of light-emitting devices L, or light-emitting devices L arranged in an A*B array. The control signal may be, for example, a binary "1" for controlling the turning on of the backlight unit, and the control signal may be, for example, a binary "0" for controlling the turning off of the backlight unit.

In some embodiments, the display panel 22 also receives an image frame, which is an image signal, wherein each image frame corresponds to a backlight control signal. The image frame may be an image frame generated by a processor in the display device 10. Driven by the image frame, the display panel 22 displays an image.

The display device 10 shown in FIG1 is used to display images through a display panel 22, and the display device 10 provides a visual experience to a viewer viewing the display device. Among them, a stereoscopic image can better present the real world, so the display device 10 is constantly developing in the direction of displaying a stereoscopic image. The display device 10 displays a stereoscopic image based on the visual shift characteristic. For example, when two plane images with different depth information are projected to the left eye and the right eye of the viewer respectively, the viewer's brain interprets the two plane images with different depth information, and then the stereoscopic image can be viewed.

Exemplarily, the technology of displaying stereoscopic images by the display device 10 is also called 3-dimension (3D) technology. 3D technology is divided into two categories: glasses-type 3D technology and naked-eye 3D technology. Glasses-type 3D technology mainly involves wearing lenses with different polarization states for the left and right eyes of the viewer, so that the viewer's left eye receives the left eye image and the right eye receives the right eye image. The left eye image and the right eye image have different depth information, and there is parallax between the left eye image and the right eye image seen by the viewer. The viewer performs image fusion, depth reconstruction, and stereoscopic imaging on the left eye image and the right eye image in his brain, and then can view the stereoscopic image.

Compared with the glasses-type 3D technology, the advantage of naked-eye 3D technology is that it does not require the use of glasses. Currently, naked-eye 3D technology includes light barrier technology, cylindrical lens technology and directional backlight technology.

Among them, the light barrier technology is to create a series of vertical stripes with a direction of 90° by setting a liquid crystal layer and a polarizing film between the backlight module 21 and the display panel 22 to form a parallax barrier. The parallax barrier is used to make the viewer's left eye receive the left eye image and the right eye receive the right eye image. The left eye image and the right eye image have different depth information, so that the viewer can see a stereoscopic image. Among them, the light barrier technology mainly blocks the light transmitted to the right eye through the parallax barrier so that the viewer's left eye receives the left eye image, and blocks the light transmitted to the left eye so that the viewer's right eye receives the right eye image. However, the parallax barrier blocks light and often reduces the resolution of the display device 10. Therefore, the light barrier technology will cause the resolution of the display device 10 to be reduced.

The lenticular lens technology is to set a lenticular lens on the light-emitting side of the display panel 22, and use the lenticular lens to allow the viewer's left eye to receive the left-eye image and the right eye to receive the right-eye image. The left-eye image and the right-eye image have different depth information, so that the viewer can see a stereoscopic image. Among them, the number of viewpoints in the lenticular lens will affect the resolution of the display device 10, so the lenticular lens technology will also cause the resolution of the display device 10 to be reduced.

The directional backlight technology is to set an optical lens between the backlight module 21 and the display panel 22. The optical lens transmits the light emitted by the backlight module 21 to the left eye and the right eye of the viewer in a directionally manner, so that the left eye of the viewer receives the left eye image and the right eye receives the right eye image. The left eye image and the right eye image have different depth information, so that the viewer can see a stereoscopic image.

4, an embodiment of the present application provides a structural schematic diagram of a display device 10, wherein the display device 10 uses a directional backlight technology to display a stereoscopic image, wherein the display device 10 includes a backlight module 21, an optical lens 23, and a display panel 22. In combination with FIG5 and FIG6, the display device 10 displays a stereoscopic image to a viewer as an example.

Specifically, as shown in FIG. 5 , FIG. 5 shows a display schematic diagram of the display device 10 at the first moment, wherein the backlight module 21 includes a plurality of backlight units 210, and at the first moment, the backlight module 21 turns on a plurality of backlight units 210 corresponding to the left eye of the viewer, and at the first moment, the display panel 22 displays a left-eye image corresponding to the left eye of the viewer, wherein the turned-on backlight units 210 in the backlight module 21 emit light, and the light is transmitted to the optical lens 23, and the optical lens 23 adjusts the transmission direction of the light so that the transmission direction of the light points to the left eye of the viewer, thereby allowing the left eye of the viewer to receive the left-eye image. At the first moment, the right eye of the viewer does not receive the image.

Referring to FIG. 6 , FIG. 6 shows a display schematic diagram of the display device 10 at the second moment, wherein the backlight module 21 includes a plurality of backlight units 210, and at the second moment, the backlight module 21 turns on a plurality of backlight units 210 corresponding to the right eye of the viewer, and at the second moment, the display panel 22 displays a right-eye image corresponding to the right eye of the viewer, wherein the turned-on backlight units 210 in the backlight module 21 emit light, and the light is transmitted to the optical lens 23, and the optical lens 23 adjusts the transmission direction of the light so that the transmission direction of the light points to the right eye of the viewer, thereby allowing the right eye of the viewer to receive the right-eye image. At the second moment, the left eye of the viewer does not receive the image.

In the directional backlight technology, the left eye image and the right eye image have different depth information, and the left eye image and the right eye image seen by the viewer have parallax. At the same time, when the interval between the first moment and the second moment is relatively small, based on the principle of visual persistence, the viewer's eyes are equivalent to receiving the left eye image and the right eye image at the same time, and the left eye image and the right eye image received by the viewer have parallax. The viewer fuses the left eye image and the right eye image in his brain, and then reconstructs the depth, and finally stereoscopic imaging, so that the viewer can see the stereoscopic image.

In some embodiments, the display device 10 also includes a face detector, which is used to detect viewer data, including viewer position information. The face detector transmits the viewer data to a processor in the display device 10, and the processor processes the data and generates a backlight control signal based on the viewer's position information. Under the control of the backlight control signal, the backlight module 21 turns on the backlight unit corresponding to the viewer so that the viewer can view the stereoscopic image even when moving.

Among them, the directional backlight technology allows viewers to watch stereoscopic images by displaying the left eye image and the right eye image at different times with a small time difference. This will not cause a reduction in the resolution of the display device 10. In naked-eye 3D technology, the directional backlight technology has greater advantages than the light barrier technology and the cylindrical lens technology.

Exemplarily, with reference to FIG7 , an embodiment of the present application shows a display schematic diagram of a display device 10 displaying a stereoscopic image to multiple viewers, wherein the viewers of the display device 10 shown in FIG7 include viewer 1 and viewer 2. Viewer 1 and viewer 2 simultaneously view the stereoscopic image displayed by the display device 10. Specifically, at a first moment, the backlight module 21 turns on a plurality of backlight units 210 corresponding to the left eye of viewer 1, and the backlight module 21 turns on a plurality of backlight units 210 corresponding to the left eye of viewer 2. At a first moment, the display panel 22 displays left-eye images corresponding to the left eyes of viewer 1 and viewer 2. It should be understood that viewer 1 and viewer 2 view the same stereoscopic image, so the left-eye image of viewer 1 and the left-eye image of viewer 2 are one picture. The turned-on backlight unit 210 in the backlight module 21 emits light, and the light is transmitted to the optical lens 23. The optical lens 23 adjusts the transmission direction of the light so that the transmission direction of a part of the light points to the left eye of the viewer 1, and the optical lens 23 adjusts the transmission direction of the light so that the transmission direction of another part of the light points to the left eye of the viewer 2, so that the left eye of the viewer 1 receives the left eye image, and the left eye of the viewer 2 receives the left eye image. At the first moment, the right eye of the viewer 1 does not receive the image, and the right eye of the viewer 2 does not receive the image.

At the second moment, the backlight module 21 turns on a plurality of backlight units 210 corresponding to the right eye of viewer 1, and the backlight module 21 turns on a plurality of backlight units 210 corresponding to the right eye of viewer 2. At the second moment, the display panel 22 displays the right eye images corresponding to the right eyes of viewer 1 and viewer 2. It should be understood that viewer 1 and viewer 2 watch the same stereoscopic image, so the right eye image of viewer 1 and the right eye image of viewer 2 are one picture. Among them, the turned-on backlight unit 210 in the backlight module 21 emits light, and the light is transmitted to the optical lens 23. The optical lens 23 adjusts the transmission direction of the light so that the transmission direction of a part of the light points to the right eye of viewer 1, and the optical lens 23 adjusts the transmission direction of the light so that the transmission direction of another part of the light points to the right eye of viewer 2, so that the right eye of viewer 1 receives the right eye image, and the right eye of viewer 2 receives the right eye image. Among them, at the second moment, the left eye of viewer 1 does not receive the image, and the left eye of viewer 2 does not receive the image.

Among them, when the display device 10 displays a stereoscopic image to multiple viewers, the left eye (or right eye) of each viewer will correspond to a certain number of backlight units. However, the number of backlight units 210 in the backlight module 21 in the display device 10 is limited. Therefore, the display device 10 can only display a stereoscopic image to a predetermined number of viewers. The predetermined number is also called the maximum number of viewers supported by the display device 10. When the number of viewers watching the display device 10 exceeds the maximum number of viewers, the backlight units in the backlight module 21 will not be enough to be allocated, which will cause the backlight units of the display device 10 to receive repeated or erroneous control signals. After the light emitted by the backlight module 21 passes through the optical lens 21, the transmission direction of the light will simultaneously point to the left eye and the right eye of some viewers, making it impossible for these viewers to watch the stereoscopic image, and even affecting the viewing experience of other viewers. In severe cases, the display device 10 will have control confusion problems, and thus cannot display stereoscopic images.

To this end, an embodiment of the present application provides a control method for a display device, and the control method for a display device is applied to the display device shown in FIG8. Referring to FIG8, an embodiment of the present application provides a display schematic diagram of a display device, wherein the display device 10 includes a backlight module 21, an optical lens 23, a display panel 22, a face detector 24, and a processor 25.

The backlight module 21 includes a plurality of backlight units 210 , and the backlight unit 210 includes one or more light-emitting devices.

The optical lens 23 includes a Fresnel lens, and is used to project the light emitted by the backlight module 21 to the left eye or the right eye of the viewer in a directionally manner.

The face detector 24 includes an RGBD depth camera, and the face detector 24 is used to obtain the viewer's data, wherein the viewer's data includes the viewer's facial information, the viewer's location information, the viewer's gesture information, and the start time of the viewer watching the display device, etc.

The processor 25 includes a field programmable gate array (FPGA) and an application specific integrated circuit (ASIC). The processor 25 is used to receive the viewer's data obtained by the face detector 24, process the viewer's data to generate a backlight control signal, and transmit the backlight control signal to the backlight module 21. The backlight control signal includes multiple control signals, and one control signal is used to control the opening or closing of a backlight unit. The backlight unit 210 includes one or more light-emitting devices. Controlling the backlight unit to turn on means controlling the light-emitting device in the backlight unit to turn on, and controlling the backlight unit to turn off means controlling the light-emitting device in the backlight unit to turn off. The backlight module 21 turns on the corresponding backlight unit under the control of the backlight control signal to emit light. The processor 25 is also used to transmit image frames to the display panel 22, and the display panel 22 displays images under the drive of the image frames.

In combination with the architecture of the display device shown in FIG8 , the present application further provides a method for controlling the display device. Referring to FIG9 , an embodiment of the present application provides a flow chart of a method for controlling the display device, wherein the method includes:

S101. Acquire data of a plurality of viewers viewing a display device.

Exemplarily, the display device 10 acquires data of multiple viewers viewing the display device 10, specifically, the face detector 24 in the display device 10 acquires data of multiple viewers viewing the display device 10, such as: the face detector 24 has a field of view (FOV), and the face detector 24 is used to acquire images within the field of view, and determine the data of multiple viewers viewing the display device 10 based on the acquired images. Among them, the display area of the display device 10 also has a field of view, and the field of view of the face detector 24 is greater than or equal to the field of view of the display area of the display device 10. Usually, the field of view of the face detector 24 and the field of view of the display area of the display device 10 are set to overlap.

Among them, the face detector 24 includes an RGBD depth camera, which can capture images and obtain the x and y coordinates of each pixel in the captured image in a pixel coordinate system, as well as the depth value of each pixel, wherein the depth value is the distance between the display device 10 and the captured object.

The viewer's data may include, but is not limited to, the viewer's facial information, the viewer's location information, the viewer's gesture information, and the start time when the viewer watches the display device.

Exemplarily, as shown in FIG8 , viewers viewing the display device 10 include viewer 1, viewer 2, and viewer 3. The face detector 24 in the display device 10 acquires an image within the field of view angle at a predetermined interval. For example, at time t1, viewer 1 enters the field of view angle range of the face detector 24. Since the field of view angle of the display area of the display device 10 overlaps with the field of view angle of the face detector 24, it means that viewer 1 starts to watch the image displayed by the display device 10. The image within the field of view angle acquired by the face detector 24 includes viewer 1. The face detector 24 acquires data of viewer 1 based on the acquired image. The data of viewer 1 includes face information of viewer 1, position information of viewer 1, gesture information of viewer 1, and time t1. Time t1 is the start time of viewer 1 viewing the display device 10. For example, at time t2 after time t1, viewer 2 enters the field of view of face detector 24, and the image within the field of view acquired by face detector 24 includes viewer 1 and viewer 2, wherein face detector 24 acquires data of viewer 1 and viewer 2 based on the acquired image, wherein the data of viewer 1 includes face information of viewer 1, position information of viewer 1, gesture information of viewer 1, and time t1, and the data of viewer 2 includes face information of viewer 2, position information of viewer 2, gesture information of viewer 2, and time t2, wherein time t2 is the start time of viewer 2 viewing display device 10; for example, at time t3 after time t2, viewer 3 enters the field of view of face detector 24. Within the field of view angle range, the image within the field of view angle acquired by the face detector 24 includes viewer 1, viewer 2 and viewer 3, wherein the face detector 24 acquires data of viewer 1, data of viewer 2 and data of viewer 3 according to the acquired image, the data of viewer 1 includes facial information of viewer 1, position information of viewer 1, gesture information of viewer 1 and time t1, the data of viewer 2 includes facial information of viewer 2, position information of viewer 2, gesture information of viewer 2 and time t2, the data of viewer 3 includes facial information of viewer 3, position information of viewer 3, gesture information of viewer 3 and time t3, wherein time t3 is the start time of viewer 3 watching the display device 10.

It should be understood that in FIG8 , when the viewer 1 is stationary, the data of the viewer 1 at time t1 is consistent with the data of the viewer 1 at time t2, for example, the position information of the viewer 1 at time t1 is consistent with the position information of the viewer 1 at time t2. When the viewer 1 moves within the field of view of the face detector 24, the data of the viewer 1 at time t1 is inconsistent with the data of the viewer 1 at time t2, for example, the position information of the viewer 1 at time t1 is inconsistent with the position information of the viewer 1 at time t2.

S102: Determine a priority level of each of the multiple viewers according to data of each of the multiple viewers.

The viewer priority level is used to represent the priority of displaying images to the viewer.

Exemplarily, the display device 10 determines the priority level of each of the multiple viewers based on the data of each of the multiple viewers; wherein the priority level of the viewer is used to characterize the priority of displaying the image to the viewer. Specifically, the processor 25 in the display device 10 determines the priority level of each of the multiple viewers based on the data of each of the multiple viewers; wherein the priority level of the viewer is used to characterize the priority of displaying the image to the viewer.

Exemplarily, as shown in FIG8 , the display device 10 may determine that the priority level of viewer 1 is 1 based on the data of viewer 1. The display device 10 determines that the priority level of viewer 2 is 2 based on the data of viewer 2. The display device 10 determines that the priority level of viewer 3 is 3 based on the data of viewer 3. Among them, the priority level gradually decreases as the value increases, so the priority level of viewer 1 is higher than the priority level of viewer 2, which is higher than the priority level of viewer 3.

Among them, the priority levels in the above embodiments are represented by numbers 1, 2, and 3, and the smaller the numerical value of the number, the higher the priority level. In other embodiments, the priority level can also be represented by letters a, b, and c, and the priority level gradually decreases in the order of the 26 English letters. The embodiments of this application do not limit how the priority level is represented. In the subsequent embodiments, the priority level is represented by numbers as an example for explanation, wherein the smaller the numerical value of the number, the higher the priority level.

S103 . Based on the priority levels of the multiple viewers, determine M designated viewers with high priority levels from the multiple viewers.

Wherein, M is a positive integer, and M is less than or equal to the maximum number of viewers supported by the display device 10.

Exemplarily, the display device 10 determines M designated viewers with high priority levels from among the multiple viewers based on the priority levels of the multiple viewers, where M is a positive integer and is less than or equal to the maximum number of viewers supported by the display device 10. Specifically, the processor 25 in the reality device 10 determines M designated viewers with high priority levels from among the multiple viewers based on the priority levels of the multiple viewers, where M is a positive integer and is less than or equal to the maximum number of viewers supported by the display device 10.

Exemplarily, as shown in Figure 8, the optical lens 23 in the display device 10 has a field of view angle, and the maximum number of viewers supported by the display device 10 is positively correlated with the field of view angle of the optical lens 23 in the display device 10. When the field of view angle of the optical lens 23 increases, the maximum number of viewers supported by the display device 10 also increases; the maximum number of viewers supported by the display device 10 is positively correlated with the number of backlight units 210 in the backlight module 21 in the display device 10. When the number of backlight units 210 increases, the maximum number of viewers supported by the display device 10 also increases.

Exemplarily, for example, when the maximum number of viewers supported by the display device 10 is 2, since M is less than or equal to the maximum number of viewers supported by the display device 10, M is less than or equal to 2. Taking M equal to 2 as an example, in step S102, the display device 10 determines that the priority level of viewer 1 is a, the priority level of viewer 2 is b, and the priority level of viewer 3 is c, and the priority level of viewer 1 is higher than the priority level of viewer 2, which is higher than the priority level of viewer 3. Then based on the priority level of viewer 1, the priority level of viewer 2, and the priority level of viewer 3, two designated viewers with high priority levels are determined from viewer 1, viewer 2, and viewer 3, specifically, viewer 1 and viewer 2 with high priority levels are determined as designated viewers. The display device 10 displays stereoscopic images to viewer 1 and viewer 2, and the display device 10 does not display stereoscopic images to viewer 3.

S104, turning on the backlight unit corresponding to the left eye of each designated viewer among the plurality of backlight units, and displaying a left-eye image based on the backlight unit corresponding to the left eye.

Exemplarily, the display device 10 turns on the backlight unit 210 corresponding to the left eye of each designated viewer among multiple backlight units 210, and displays the left eye image based on the backlight unit 210 corresponding to the left eye. Specifically, the backlight module 21 in the display device 10 turns on the backlight unit 210 corresponding to the left eye of each designated viewer among multiple backlight units 210, and the display panel 22 in the display device 10 displays the left eye image based on the backlight unit 210 corresponding to the left eye.

Exemplarily, in step S103, the display device 10 determines M designated viewers, wherein the display device 10 needs to display a stereoscopic image to the M designated viewers, and the display device 10 applies a directional backlight technology to realize the display of the stereoscopic image, then the processor 25 in the display device 10 will determine the backlight unit 210 corresponding to the left eye and the backlight unit 210 corresponding to the right eye of each designated viewer in the M designated viewers. In step S104, the backlight unit 210 corresponding to the left eye of each designated viewer needs to be turned on, therefore, the processor 25 in the display device 10 sends a backlight control signal to the backlight module 21, and the backlight control signal controls the backlight module 21 to turn on the backlight unit 210 corresponding to the left eye of each designated viewer in the plurality of backlight units 210. Synchronously, the processor 25 in the display device 10 transmits an image frame to the display panel 22, and the image frame controls the display panel 22 to display the left eye image based on the backlight unit 210 corresponding to the left eye.

Exemplarily, when the display device 10 determines that the viewer 1 is the designated viewer and the viewer 2 is the designated viewer, the display device 10 displays a stereoscopic image to the viewer 1 and the viewer 2. As shown in FIG8 , the processor 25 in the display device 10 determines that the backlight unit corresponding to the left eye of the viewer 1 is the backlight unit 210#1 and the backlight unit 210#4 according to the data of the viewer 1; the processor 25 in the display device 10 determines that the backlight unit corresponding to the left eye of the viewer 2 is the backlight unit 210#2 and the backlight unit 210#5 according to the data of the viewer 2.

In one example, at one moment, the processor 25 in the display device 10 controls the backlight module 21 to turn on the backlight unit 210#1 and the backlight unit 210#4 corresponding to the left eye of the viewer 1 among the multiple backlight units 210, and at the same time, the processor 25 in the display device 10 also controls the backlight module 21 to turn on the backlight unit 210#2 and the backlight unit 210#5 corresponding to the left eye of the viewer 2 among the multiple backlight units 210, and the other backlight units 210 are turned off. The processor 25 controls the display panel 22 to display the left eye image corresponding to the left eye of the viewer 1 based on the backlight unit 210 corresponding to the left eye of the viewer 1, and the processor 25 also controls the display panel 22 to display the left eye image corresponding to the left eye of the viewer 2 based on the backlight unit 210 corresponding to the left eye of the viewer 2. It should be understood that the viewer 1 and the viewer 2 watch the same stereoscopic image, so the left eye image of the viewer 1 and the left eye image of the viewer 2 are one picture. The turned-on backlight units 210#1 and 210#4 emit light, and the light is transmitted to the optical lens 23. The optical lens 23 adjusts the transmission direction of the light so that the transmission direction of the light points to the left eye of the viewer 1, so that the left eye of the viewer 1 receives the left eye image. The turned-on backlight units 210#2 and 210#5 emit light, and the light is transmitted to the optical lens 23. The optical lens 23 adjusts the transmission direction of the light so that the transmission direction of the light points to the left eye of the viewer 2, so that the left eye of the viewer 2 receives the left eye image.

S105 , turning on the backlight unit corresponding to the right eye of each designated viewer among the plurality of backlight units, and displaying a right-eye image based on the backlight unit corresponding to the right eye.

Exemplarily, the display device 10 turns on the backlight unit 210 corresponding to the right eye of each designated viewer among multiple backlight units 210, and displays the right eye image based on the backlight unit 210 corresponding to the right eye. Specifically, the backlight module 21 in the display device 10 turns on the backlight unit 210 corresponding to the right eye of each designated viewer among multiple backlight units 210, and the display panel 22 in the display device 10 displays the right eye image based on the backlight unit 210 corresponding to the right eye.

Exemplarily, in step S103, the display device 10 determines M designated viewers, wherein the display device 10 needs to display a stereoscopic image to the M designated viewers, and the display device 10 applies a directional backlight technology to realize the display of the stereoscopic image, then the processor 25 in the display device 10 will determine the backlight unit 210 corresponding to the left eye and the backlight unit 210 corresponding to the right eye of each designated viewer in the M designated viewers. In step S105, the backlight unit 210 corresponding to the right eye of each designated viewer needs to be turned on, therefore, the processor 25 in the display device 10 sends a backlight control signal to the backlight module 21, and the backlight control signal controls the backlight module 21 to turn on the backlight unit 210 corresponding to the right eye of each designated viewer in the plurality of backlight units 210. Synchronously, the processor 25 in the display device 10 transmits an image frame to the display panel 22, and the image frame controls the display panel 22 to display the right eye image based on the backlight unit 210 corresponding to the right eye.

Exemplarily, when the display device 10 determines that the viewer 1 is the designated viewer and the viewer 2 is the designated viewer, the display device 10 displays a stereoscopic image to the viewer 1 and the viewer 2. As shown in FIG8 , the processor 25 in the display device 10 determines that the backlight unit corresponding to the right eye of the viewer 1 is the backlight unit 210#4 and the backlight unit 210#7 according to the data of the viewer 1; the processor 25 in the display device 10 determines that the backlight unit corresponding to the right eye of the viewer 2 is the backlight unit 210#5 and the backlight unit 210#8 according to the data of the viewer 2.

In one example, at another moment, the processor 25 in the display device 10 controls the backlight module 21 to turn on the backlight unit 210#4 and the backlight unit 210#7 corresponding to the right eye of the viewer 1 among the multiple backlight units 210, and at the same time, the processor 25 in the display device 10 also controls the backlight module 21 to turn on the backlight unit 210#5 and the backlight unit 210#8 corresponding to the right eye of the viewer 2 among the multiple backlight units 210, and the other backlight units 210 are turned off. The processor 25 controls the display panel 22 to display the right eye image corresponding to the right eye of the viewer 1 based on the backlight unit 210 corresponding to the right eye of the viewer 1, and the processor 25 also controls the display panel 22 to display the right eye image corresponding to the right eye of the viewer 2 based on the backlight unit 210 corresponding to the right eye of the viewer 2. It should be understood that the viewer 1 and the viewer 2 watch the same stereoscopic image, so the right eye image of the viewer 1 and the right eye image of the viewer 2 are one picture. The turned-on backlight units 210#4 and 210#7 emit light, and the light is transmitted to the optical lens 23. The optical lens 23 adjusts the transmission direction of the light so that the transmission direction of the light points to the right eye of the viewer 1, so that the right eye of the viewer 1 receives the right eye image. The turned-on backlight units 210#5 and 210#8 emit light, and the light is transmitted to the optical lens 23. The optical lens 23 adjusts the transmission direction of the light so that the transmission direction of the light points to the right eye of the viewer 2, so that the right eye of the viewer 2 receives the right eye image.

When the refresh rate of the display device 10 is 60 Hz, the interval between the above-mentioned one moment and another moment is short, so the time interval between the time when the viewer 1 receives the left eye image and the time interval between the viewer 1 receiving the right eye image is very short. Based on the principle of visual persistence, the viewer 1 is equivalent to receiving the left eye image and the right eye image at the same time, and the viewer 1 can then watch the stereoscopic image. The time interval between the time when the viewer 2 receives the left eye image and the time interval between the viewer 2 receiving the right eye image is very short. Based on the principle of visual persistence, the viewer 2 is equivalent to receiving the left eye image and the right eye image at the same time, and the viewer 2 can then watch the stereoscopic image.

Exemplarily, in another example, step S104 specifically includes the display device 10 turning on the backlight unit corresponding to the left eye of each specified viewer in multiple backlight units in sequence according to a preset order. Exemplarily, the viewer's data includes the start time of the viewer watching the display device 10, and the preset order is the order from early to late start time of watching the display device 10, wherein the start time of viewer 1 watching the display device 10 is moment t1, and the start time of viewer 2 watching the display device 10 is moment t2, and moment t1 is earlier than moment t2, so the preset order is viewer 1-viewer 2.

Specifically, at the first moment, the processor 25 in the display device 10 controls the backlight module 21 to turn on the backlight unit 210#1 and the backlight unit 210#4 corresponding to the left eye of the viewer 1 among the multiple backlight units 210, and the other backlight units 210 are turned off. The processor 25 controls the display panel 22 to display the left eye image corresponding to the left eye of the viewer 1 based on the backlight unit 210 corresponding to the left eye of the viewer 1. The turned-on backlight unit 210#1 and the backlight unit #4 emit light, and the light is transmitted to the optical lens 23. The optical lens 23 adjusts the transmission direction of the light so that the transmission direction of the light points to the left eye of the viewer 1, so that the left eye of the viewer 1 receives the left eye image. At a second moment after the first moment, the processor 25 in the display device 10 further controls the backlight module 21 to turn on the backlight unit 210#2 and the backlight unit 210#5 corresponding to the left eye of the viewer 2 among the multiple backlight units 210, and the processor 25 further controls the display panel 22 to display the left eye image corresponding to the left eye of the viewer 2 based on the backlight unit 210 corresponding to the left eye of the viewer 2. The turned-on backlight unit 210#2 and the backlight unit 210#5 emit light, and the light is transmitted to the optical lens 23, and the optical lens 23 adjusts the transmission direction of the light so that the transmission direction of the light points to the left eye of the viewer 2, so that the left eye of the viewer 2 receives the left eye image.

Step S105 specifically includes the display device 10 turning on the backlight unit corresponding to the right eye of each specified viewer in a plurality of backlight units in sequence according to a preset order. Exemplarily, the viewer data includes the start time of the viewer viewing the display device 10, and the preset order is the order from early to late in terms of the start time of viewing the display device 10, wherein the start time of viewer 1 viewing the display device 10 is moment t1, and the start time of viewer 2 viewing the display device 10 is moment t2, and moment t1 is earlier than moment t2, so the preset order is viewer 1-viewer 2.

Specifically, at a third moment after the second moment, the processor 25 in the display device 10 controls the backlight module 21 to turn on the backlight unit 210#4 and the backlight unit 210#7 corresponding to the right eye of the viewer 1 among the multiple backlight units 210, and the other backlight units 210 are turned off. The processor 25 controls the display panel 22 to display the right eye image corresponding to the right eye of the viewer 1 based on the backlight unit 210 corresponding to the right eye of the viewer 1. The turned-on backlight unit 210#1 and the backlight unit #4 emit light, and the light is transmitted to the optical lens 23. The optical lens 23 adjusts the transmission direction of the light so that the transmission direction of the light points to the right eye of the viewer 1, so that the right eye of the viewer 1 receives the right eye image. At a fourth moment after the third moment, the processor 25 in the display device 10 controls the backlight module 21 to turn on the backlight unit 210#5 and the backlight unit 210#8 corresponding to the right eye of the viewer 2 among the multiple backlight units 210, and the processor 25 controls the display panel 22 to display the right eye image corresponding to the right eye of the viewer 2 based on the backlight unit 210 corresponding to the right eye of the viewer 2. The turned-on backlight unit 210#5 and the backlight unit 210#8 emit light, and the light is transmitted to the optical lens 23, and the optical lens 23 adjusts the transmission direction of the light so that the transmission direction of the light points to the right eye of the viewer 2, so that the right eye of the viewer 2 receives the right eye image.

Among them, when the refresh rate of the display device 10 is 120 Hz, the interval between two adjacent moments in the above-mentioned first moment, second moment, third moment and fourth moment is short, so the time interval between the time when viewer 1 receives the left eye image and the time interval between viewer 1 receiving the right eye image is very short. Based on the principle of visual persistence, viewer 1 is equivalent to receiving the left eye image and the right eye image at the same time, and viewer 1 can then watch a stereoscopic image. The time interval between the time when viewer 2 receives the left eye image and the time interval between viewer 2 receiving the right eye image is very short. Based on the principle of visual persistence, viewer 2 is equivalent to receiving the left eye image and the right eye image at the same time, and viewer 2 can then watch a stereoscopic image.

Among them, when the backlight module 21 in the display device 10 sequentially turns on the backlight unit corresponding to the left eye of the viewer 1 and then turns on the backlight unit corresponding to the left eye of the viewer 2 in a preset order, synchronously, the display panel 22 in the display device 10 also first displays the left eye image corresponding to the left eye of the viewer 1 and then displays the left eye image corresponding to the left eye of the viewer 2 in a preset order. When the backlight module 21 in the display device 10 sequentially turns on the backlight unit corresponding to the right eye of the viewer 1 and then turns on the backlight unit corresponding to the right eye of the viewer 2 in a preset order, synchronously, the display panel 22 in the display device 10 also first displays the right eye image corresponding to the right eye of the viewer 1 and then displays the right eye image corresponding to the right eye of the viewer 2 in a preset order. When the left eye image corresponding to the left eye of the viewer 1 displayed by the display device 10 is different from the left eye image corresponding to the left eye of the viewer 2, and the right eye image corresponding to the right eye of the viewer 1 displayed by the display device 10 is different from the right eye image corresponding to the right eye of the viewer 2, the viewer 1 and the viewer 2 can watch different stereoscopic images. This makes the display device 10 display stereoscopic images with better effect and can meet different needs.

It should be understood that the control method described in the present application may not be limited to that shown in FIG. 9 , where S104 is executed first and then S105. In some embodiments, step S105 may be executed first so that each designated observer receives the right eye image first, and then step S104 may be executed so that each designated observer receives the left eye image. In this way, the designated observer can also view a stereoscopic image.

In the control method of the display device 10, the display device 10 can obtain data of multiple viewers, and the display device 10 determines the priority level of each of the multiple viewers according to the data of each of the multiple viewers; wherein the priority level of the viewer is used to characterize the priority of displaying images to the viewer, and the display device 10 further determines M designated viewers with high priority levels from the multiple viewers based on the priority levels of the multiple viewers. Wherein, M is a positive integer, and M is less than or equal to the maximum number of viewers supported by the display device 10. Subsequently, the display device 10 displays a stereoscopic image to the M designated viewers. Specifically, the display device 10 may turn on the backlight unit corresponding to the left eye of each designated viewer among the multiple backlight units, and display the left eye image based on the backlight unit corresponding to the left eye. Subsequently, the display device 10 turns on the backlight unit corresponding to the right eye of each designated viewer among the multiple backlight units, and displays the right eye image based on the backlight unit corresponding to the right eye. Alternatively, the display device 10 may turn on the backlight unit corresponding to the right eye of each designated viewer among the multiple backlight units, and display the right eye image based on the backlight unit corresponding to the right eye. Subsequently, the display device 10 turns on the backlight unit corresponding to the left eye of each designated viewer among the multiple backlight units, and displays the left eye image based on the backlight unit corresponding to the left eye. The display device 10 projects the left eye image to the left eye of each designated viewer among the M designated viewers, and projects the right eye image to the right eye of each designated viewer among the M designated viewers, so that the M designated viewers can view the stereoscopic image. Among them, since the display device determines the priority level of each of the multiple viewers according to the data of each of the multiple viewers, M designated viewers with high priority levels are determined from the multiple viewers. M is less than or equal to the maximum number of viewers supported by the display device 10. Therefore, when the number of viewers watching the display device 10 is greater than the maximum number of viewers supported by the display device 10, the display device 10 selects M designated viewers with high priority levels from the multiple viewers, and the display device 10 displays a stereoscopic image to the designated viewers, thereby avoiding the display device 10 from having a control confusion problem caused by the number of viewers of the display device 10 being greater than the maximum number of viewers supported by the display device 10.

Exemplarily, the viewer's data may include but is not limited to the viewer's facial information, the viewer's location information, the viewer's gesture information and the start time of the viewer viewing the display device. Therefore, the above step S102 includes: determining the priority level of each viewer based on the facial information of each viewer among multiple viewers, and/or determining the priority level of each viewer based on the location information of each viewer among multiple viewers, and/or determining the priority level of each viewer based on the start time of each viewer viewing the display device among multiple viewers, and/or determining the priority level of each viewer based on the gesture information of each viewer among multiple viewers.

Specifically, when the viewer data includes the viewer's facial information, as shown in FIG. 10 , step S102 determines the priority level of each viewer according to the facial information of each viewer among the multiple viewers, and specifically includes:

S201, obtaining multiple preset face information.

Among them, each preset face information in the multiple preset face information is correspondingly set with a priority level.

Exemplarily, the display device 10 obtains multiple preset face information, wherein each of the multiple preset face information is correspondingly set with a priority level. Specifically, the face detector 24 in the display device 10 obtains multiple preset face information, wherein each of the multiple preset face information is correspondingly set with a priority level. For example, the face detector 24 uses the facial information of multiple viewers in the image within the field of view obtained at a predetermined time as multiple preset facial information, and transmits the multiple preset facial information to the processor 25 of the display device 10, wherein the processor 25 in the display device 10 receives the multiple preset facial information, and further, the processor 25 of the display device 10 stores the received multiple preset facial information locally, such as in a storage unit. The predetermined time is, for example, the configuration time of the display device 10.

Exemplarily, the number of multiple preset facial information is less than or equal to the maximum number of viewers supported by the display device 10, where the maximum number of viewers can refer to the situation where the stereoscopic image displayed by the display device 10 meets user requirements. It can be understood that the display device 10 can display stereoscopic images to at most the maximum number of viewers.

In other embodiments, an acquisition device may also be provided in the display device, and the acquisition device of the display device 10 receives multiple preset facial information transmitted from an external device to the display device 10, which is not limited in the embodiments of the present application.

Exemplarily, the acquisition device of the display device 10 may receive multiple preset face information input by the administrator of the display device 10, wherein, as shown in FIG. 11, the multiple preset face information is specifically input in the format of a two-dimensional list, wherein FIG. 11 shows 2*2 preset face information, each preset face information corresponds to a specified viewer, and each preset face information is set with a priority level. For example, the priority levels of any two preset face information in the 2*2 preset face information may be the same, and the priority level of each preset face information in the 2*2 preset face information may be 1; for another example, the priority levels of any two preset face information in the 2*2 preset face information may be different, and the priority level of the preset face information in the first row and first column of the 2*2 preset face information may be 1, the priority level of the preset face information in the first row and second column of the 2*2 preset face information may be 2, the priority level of the preset face information in the second row and first column of the 2*2 preset face information may be 3, and the priority level of the preset face information in the second row and second column of the 2*2 preset face information may be 4.

S202: For any viewer, match the viewer's facial information with each preset facial information.

The matching result includes a successful match or a failed match; or it can be understood that the matching result includes a match or a mismatch.

Exemplarily, the display device 10 matches the facial information of each of the multiple viewers with each preset facial information. Specifically, the processor 25 in the display device 10 matches the facial information of each of the multiple viewers with each preset facial information.

Exemplarily, in step S101, the processor 25 of the display device 10 receives the data of viewer 1, viewer 2, and viewer 3 acquired by the face detector 24 of the display device 10, wherein the data of viewer 1 includes the facial information of viewer 1, and the processor 25 of the display device 10 matches the facial information of viewer 1 with the 2*2 preset facial information shown in FIG11, for example, the facial information of viewer 1 matches the preset facial information of the first row and the second column in the 2*2 preset facial information shown in FIG11. The data of viewer 2 includes the facial information of viewer 2, and the processor 25 of the display device 10 matches the facial information of viewer 2 with the 2*2 preset facial information shown in FIG11, for example, the facial information of viewer 2 matches the preset facial information of the second row and the first column in the 2*2 preset facial information shown in FIG11. The data of viewer 3 includes the facial information of viewer 3. The processor 25 of the display device 10 matches the facial information of viewer 3 with the 2*2 preset facial information shown in Figure 11. For example, the facial information of viewer 3 does not match any of the 2*2 preset facial information shown in Figure 11.

S203: Determine the priority level of the viewer according to the priority level of preset facial information matched by the viewer.

Exemplarily, the display device 10 determines the priority level of the viewer according to the priority level of the preset facial information matched by the viewer. Specifically, the processor 25 in the display device 10 determines the priority level of the viewer according to the priority level of the preset facial information matched by the viewer.

Exemplarily, in the above step S202, the facial information of viewer 1 obtained by the processor 25 matches the preset facial information of the first row and the second column in the 2*2 preset facial information shown in FIG11. For example, the priority level of the preset facial information of the first row and the second column in the 2*2 preset facial information shown in FIG11 is 2, and the processor 225 determines that the priority level of viewer 1 is 2. The facial information of viewer 2 obtained by the processor 25 matches the preset facial information of the second row and the first column in the 2*2 preset facial information shown in FIG11. For example, the priority level of the preset facial information of the second row and the first column in the 2*2 preset facial information shown in FIG11 is 3, and the processor 225 determines that the priority level of viewer 2 is 3. The facial information of viewer 3 obtained by the processor 25 does not match any of the preset facial information in the 2*2 preset facial information shown in FIG11, and the processor 25 determines that the priority level of viewer 3 is empty, which is the lowest priority level.

Then in step S103, based on the priority level of viewer 1, the priority level of viewer 2, and the priority level of viewer 3, two designated viewers with high priority levels are determined from viewer 1, viewer 2, and viewer 3, specifically, viewer 1 and viewer 2 with high priority levels are determined as designated viewers. The display device 10 displays stereoscopic images to viewer 1 and viewer 2, and the display device 10 does not display stereoscopic images to viewer 3.

Then, step S104 and step S105 may be executed, and the display device 10 displays the stereoscopic image to the two designated viewers.

In this way, the priority level of each viewer is determined based on the method shown in Figure 10. Since it is only necessary to match the viewer's facial information with the preset facial information, the priority level of the preset facial information that matches the viewer is determined as the viewer's priority level, and the viewer with a high priority level is the designated viewer. Therefore, this solution can directly control the number of designated viewers by setting the number of preset facial information. The control method is simple and has high accuracy.

Specifically, the viewer data includes the viewer's location information. As shown in FIG. 12 , step S102 determines the priority level of each viewer according to the location information of each viewer among the multiple viewers, and specifically includes:

S301: For any viewer, determine the viewing area where the viewer is located according to the viewer's position information.

The viewing area includes a plurality of viewing areas, the plurality of viewing areas are obtained by dividing a display area corresponding to a display device, and each of the plurality of viewing areas is correspondingly set with a priority level.

Exemplarily, for any viewer, the display device 10 determines the viewing area where the viewer is located according to the position information of the viewer. The viewing area includes multiple viewing areas, which are obtained by dividing the display area corresponding to the display device, and each viewing area in the multiple viewing areas is correspondingly set with a priority level; specifically, the processor 25 in the display device 10 determines the viewing area where the viewer is located according to the position information of the viewer. The viewing area includes multiple viewing areas, which are obtained by dividing the display area corresponding to the display device, and each viewing area in the multiple viewing areas is correspondingly set with a priority level.

Exemplarily, the display area corresponding to the display device 10 is shown in FIG. 13, wherein an embodiment of the present application provides a schematic diagram of the display area corresponding to the display device 10, as shown in FIG. 13, according to the placement position shown in FIG. 13, the horizontal axis is the x-axis of the display area, the vertical axis is the y-axis of the display area, the range of the x-axis of the display area is [0, x3], and the range of the y-axis of the display area is [0, y3]. Referring to FIG. 13, 0<x1<x2<x3, 0<y1<y2<y3. Among them, the plane formed by the x-axis of the display area and the y-axis of the display area is parallel to the plane where the display panel 22 of the display device 10 is located, or the plane formed by the x-axis of the display area and the y-axis of the display area are at a preset angle to the plane where the display panel 22 of the display device 10 is located, and the preset angle is less than or equal to 10 degrees, which is also considered that the plane formed by the x-axis of the display area and the y-axis of the display area is parallel to the plane where the display panel 22 of the display device 10 is located. When the display area is divided into a plurality of viewing areas, only the x-axis and the y-axis of the display area are considered for division, and the distance between any point in a viewing area and the display device 10 is not considered.

Exemplarily, the display area corresponding to the display device 10 is divided into multiple viewing areas. As shown in FIG13 , the range of the x-axis of the display area is [0, x3], and the range of the y-axis of the display area is [0, y3]. The multiple viewing areas include viewing area 1, viewing area 2, viewing area 3, viewing area 4, viewing area 5, viewing area 6, viewing area 7, viewing area 8, and viewing area 9. Among them, the range of the x-axis of viewing area 1 is [0, x1], the range of the y-axis of viewing area 1 is (y2, y3], and the priority level of viewing area 1 is 1, which is the highest priority level. The range of the x-axis of viewing area 2 is (x1, x2], the range of the y-axis of viewing area 2 is (y2, y3], and the priority level of viewing area 2 is 2, which is the second highest priority level. The range of the x-axis of viewing area 3 is (x2, x3], the range of the y-axis of viewing area 3 is (y2, y3], and the priority level of viewing area 3 is 3, which is the third highest priority level. The range of the x-axis of viewing area 4 is [0, x1], the range of the y-axis of viewing area 4 is (y1, y2], and the priority level of viewing area 4 is 4, which is the fourth highest priority level. The range of the x-axis of viewing area 5 is (x1, x2], the range of the y-axis of viewing area 5 is (y1, y2], and the priority level of viewing area 5 is The priority level of domain 5 is 5, which is the fifth highest priority level. The range of the x-axis of viewing area 6 is (x2, x3], the range of the y-axis of viewing area 6 is (y1, y2], and the priority level of viewing area 6 is 6, which is the sixth highest priority level. The range of the x-axis of viewing area 7 is [0, x1], the range of the y-axis of viewing area 7 is [0, y1], and the priority level of viewing area 7 is 7, which is the seventh highest priority level. The range of the x-axis of viewing area 8 is (x1, x2], the range of the y-axis of viewing area 8 is [0, y1], and the priority level of viewing area 8 is 8, which is the eighth highest priority level. The range of the x-axis of viewing area 9 is (x2, x3], the range of the y-axis of viewing area 9 is [0, y1], and the priority level of viewing area 9 is 9, which is the lowest priority level. Among them, the priority levels of any two viewing areas among the multiple viewing areas are different.

Exemplarily, in step S101, the processor 25 of the display device 10 receives the data of viewer 1, viewer 2, and viewer 3 acquired by the face detector 24 of the display device 10. The data of viewer 1 includes the position information of viewer 1, and the position information of viewer 1 includes the x-coordinate value x(R1) of viewer 1 in the display area and the y-coordinate value y(R1) of viewer 1 in the display area. The processor 25 determines the viewing area where viewer 1 is located in the display area corresponding to the display device 10 according to the position information of viewer 1, wherein the processor 25 determines that x1<x(R1)<x2, y1<y(R1)<y2, and the processor 25 determines that the viewing area where viewer 1 is located is viewing area 5, and the priority level of viewing area 5 is 5, which is the fifth highest priority level. The data of viewer 2 includes the position information of viewer 2, and the position information of viewer 2 includes the x-coordinate value x(R2) of viewer 2 in the display area and the y-coordinate value y(R2) of viewer 2 in the display area. The processor 25 determines the viewing area where viewer 2 is located according to the position information of viewer 2, wherein the processor 25 determines that x2<x(R2)<x3, y1<y(R2)<y2. The processor 25 determines that the viewing area where viewer 2 is located is viewing area 6, and the priority level of viewing area 6 is 6, which is the sixth highest priority level. The data of viewer 3 includes the position information of viewer 3, and the position information of viewer 3 includes the x-coordinate value x(R3) of viewer 3 in the display area and the y-coordinate value y(R3) of viewer 3 in the display area. The processor 25 determines the viewing area where viewer 3 is located according to the position information of viewer 3, wherein the processor 25 determines that x2<x(R3)<x3,0<y(R3)<y1. The processor 25 determines that the viewing area where viewer 3 is located is viewing area 9, and the priority level of viewing area 9 is 9, which is the lowest priority level.

Exemplarily, the field of view angle of the display area of the display device 10 overlaps with the field of view angle of the face detector 24. Specifically, the face detector 24 of the display device 10 obtains the x-coordinate value of the viewer in the pixel coordinate system, and determines the x-coordinate value of the viewer in the display area according to the correspondence between the pixel coordinate system and the coordinate system of the display area; the face detector 24 of the display device 10 obtains the y-coordinate value of the viewer in the pixel coordinate system, and determines the y-coordinate value of the viewer in the display area according to the correspondence between the pixel coordinate system and the coordinate system of the display area.

S302: Determine the priority level of the viewer according to the priority level of the viewing area where the viewer is located.

Exemplarily, the display device 10 determines the priority level of the viewer according to the priority level of the viewing area where the viewer is located. Specifically, the processor 25 in the display device 10 determines the priority level of the viewer according to the priority level of the viewing area where the viewer is located.

Exemplarily, in step S301, the processor of the display device 10 has determined that the viewing area corresponding to the viewer 1 in the preset plane is the viewing area 5, and the priority level of the viewing area 5 is 5, so the display device 10 determines the priority level of the viewer 1 to be the priority level of the viewing area 5, which is the fifth highest priority level. The processor of the display device 10 has determined that the viewing area corresponding to the viewer 2 in the preset plane is the viewing area 6, and the priority level of the viewing area 6 is 6, so the display device 10 determines the priority level of the viewer 2 to be the priority level of the viewing area 5, which is the sixth highest priority level. The processor of the display device 10 has determined that the viewing area corresponding to the viewer 3 in the preset plane is the viewing area 9, and the priority level of the viewing area 9 is 9, so the display device 10 determines the priority level of the viewer 3 to be the priority level of the viewing area 9, which is the lowest priority level.

Then in step S103, based on the priority level of viewer 1, the priority level of viewer 2, and the priority level of viewer 3, two designated viewers with high priority levels are determined from viewer 1, viewer 2, and viewer 3, specifically, viewer 1 and viewer 2 with high priority levels are determined as designated viewers. The display device 10 displays stereoscopic images to viewer 1 and viewer 2, and the display device 10 does not display stereoscopic images to viewer 3.

Then, step S104 and step S105 may be executed, and the display device 10 displays the stereoscopic image to the two designated viewers.

In other embodiments, the display area corresponding to the display device 10 is divided into multiple viewing areas, and a priority level is set corresponding to each viewing area. Among them, the priority level of the viewing area at the center of the display area is higher than the priority level of the viewing area at other positions other than the center of the display area. As shown in FIG. 13, the multiple viewing areas include viewing area 1, viewing area 2, viewing area 3, viewing area 4, viewing area 5, viewing area 6, viewing area 7, viewing area 8, and viewing area 9. Among them, the range of the x-axis of viewing area 1 is [0, x1], the range of the y-axis of viewing area 1 is (y2, y3], and the priority level of viewing area 1 is 4, which is the fourth highest priority level. The range of the x-axis of viewing area 2 is (x1, x2], the range of the y-axis of viewing area 2 is (y2, y3], and the priority level of viewing area 2 is 3, which is the third highest priority level. The range of the x-axis of viewing area 3 is (x2, x3], the range of the y-axis of viewing area 3 is (y2, y3], and the priority level of viewing area 3 is 4, which is the fourth highest priority level. The range of the x-axis of viewing area 4 is [0, x1], the range of the y-axis of viewing area 4 is (y1, y2], and the priority level of viewing area 4 is 2, which is the second highest priority level. The range of the x-axis of viewing area 5 is (x1, x2], the range of the y-axis of viewing area 5 is (y1, y2], and the priority level of viewing area 5 is The level is 1, the highest priority level, and viewing area 5 is in the center of the display area. The range of the x-axis of viewing area 6 is (x2, x3], the range of the y-axis of viewing area 6 is (y1, y2], and the priority level of viewing area 6 is 2, which is the second highest priority level. The range of the x-axis of viewing area 7 is [0, x1], the range of the y-axis of viewing area 7 is [0, y1], and the priority level of viewing area 7 is 5, which is the fifth highest priority level. The range of the x-axis of viewing area 8 is (x1, x2], the range of the y-axis of viewing area 8 is [0, y1], and the priority level of viewing area 8 is 3, which is the third highest priority level. The range of the x-axis of viewing area 9 is (x2, x3], the range of the y-axis of viewing area 9 is [0, y1], and the priority level of viewing area 9 is 5, which is the fifth highest priority level. Among the multiple viewing areas, two viewing areas have the same priority level.

In this way, the priority level of each viewer is determined based on the method shown in Figure 12. Since the viewing area where the viewer is located is determined based on the viewer's position information, the priority level is set for the viewing area, and the priority level of the viewer is determined based on the priority level of the viewing area where the viewer is located, the display device 10 can customize the viewing area with the highest priority level, thereby improving the adaptability of the display device 10.

Specifically, the viewer data includes the viewer's location information. As shown in FIG. 14 , step S102 determines the priority level of each viewer according to the location information of each viewer among the multiple viewers, and specifically includes:

S401: Determine the distance between each viewer and a reference point according to the position information of each viewer among a plurality of viewers and the position information of a reference point.

Exemplarily, the display device 10 determines the distance between each viewer and the reference point based on the position information of each viewer among the multiple viewers and the position information of the reference point. Specifically, the processor 25 in the display device 10 determines the distance between each viewer and the reference point based on the position information of each viewer among the multiple viewers and the position information of the reference point.

Exemplarily, as shown in FIG. 15 , the display area corresponding to the display device 10 has a field of view FOV, and the FOV includes a vertical field of view (vertical-field of view, V-FOV) and a horizontal field of view (horizontal-field of view, H-FOV). The V-FOV is divided into five equal parts, and the H-FOV is divided into five equal parts. The overlapping point of the center line of the V-FOV and the center line of the H-FOV is found, and the overlapping point is the reference point. The d shown in FIG. 15 represents the distance from the reference point to the display device 10, and the value of d is positively correlated with the size of the H-FOV, and the value of d is positively correlated with the size of the V-FOV. The embodiment of the present application does not limit the value of d.

Subsequently, the processor 25 in the display device 10 determines the position information of the reference point. Specifically, the position information of the reference point includes the x-coordinate value x(c) of the reference point in the x-coordinate system of the display area described in Figure 13 and the y-coordinate value y(c) of the reference point in the y-coordinate system of the display area.

16, in some embodiments, the area with the reference point as the center and L1 as the radius is considered as the best viewing area. Generally speaking, the value of L1 is proportional to the size of the display panel 22, and the embodiment of the present application does not limit the value of L1.

Exemplarily, in step S101, the processor 25 of the display device 10 receives the data of viewer 1, viewer 2, and viewer 3 acquired by the face detector 24 of the display device 10. The data of viewer 1 includes the position information of viewer 1, and the position information of viewer 1 includes the x-coordinate value x(R1) of viewer 1 in the display area and the y-coordinate value y(R1) of viewer 1 in the display area. The processor 25 determines the distance L(R1) between viewer 1 and the reference point, wherein: The data of viewer 2 includes position information of viewer 2, and the position information of viewer 2 includes an x coordinate value x(R2) of viewer 2 in the display area and a y coordinate value y(R2) of viewer 2 in the display area. Processor 25 determines a distance L(R2) between viewer 2 and a reference point, where: The data of viewer 3 includes the position information of viewer 3, and the position information of viewer 3 includes the x coordinate value x(R3) of viewer 3 in the display area and the y coordinate value y(R3) of viewer 3 in the display area. The processor 25 determines the distance L(R3) between viewer 3 and the reference point, where:

S402: Determine the priority level of each viewer according to the distance between each viewer and the reference point.

Among them, the viewer's priority level is negatively correlated with the distance between the viewer and the reference point.

Exemplarily, the display device 10 determines the priority level of each viewer based on the distance between each viewer and the reference point, wherein the priority level of the viewer is negatively correlated with the distance between the viewer and the reference point. Specifically, the processor 25 in the display device 10 determines the priority level of each viewer based on the distance between each viewer and the reference point, wherein the priority level of the viewer is negatively correlated with the distance between the viewer and the reference point.

Exemplarily, in step S401, the distance L(R1) between viewer 1 and the reference point, the distance L(R2) between viewer 2 and the reference point, and the distance L(R3) between viewer 3 and the reference point have been determined. Among them, L(R1)<L(R2)<L(R3). The processor 25 determines that the priority level of viewer 1 is 1, the highest priority level, based on the distance L(R1) between viewer 1 and the reference point; the processor 25 determines that the priority level of viewer 2 is 2, the second highest priority level, based on the distance L(R2) between viewer 2 and the reference point; the processor 25 determines that the priority level of viewer 1 is 3, the third highest priority level, based on the distance L(R3) between viewer 3 and the reference point.

Then in step S103, based on the priority level of viewer 1, the priority level of viewer 2, and the priority level of viewer 3, two designated viewers with high priority levels are determined from viewer 1, viewer 2, and viewer 3, specifically, viewer 1 and viewer 2 with high priority levels are determined as designated viewers. The display device 10 displays stereoscopic images to viewer 1 and viewer 2, and the display device 10 does not display stereoscopic images to viewer 3.

Then, step S104 and step S105 may be executed, and the display device 10 displays the stereoscopic image to the two designated viewers.

In this way, the priority level of each viewer is determined based on the method shown in Figure 14. The priority level of the viewer is determined based on the distance between the viewer's position information and a reference point, where the reference point can be, for example, an optimal viewpoint. The closer the distance between the viewer and the reference point is, the closer the viewer is to the optimal viewpoint. This enables the display device 10 to better display stereoscopic images to the viewer.

Specifically, when the viewer data includes the start time of the viewer viewing the display device 10, as shown in FIG. 17, step S102 determines the priority level of each viewer according to the start time of each viewer viewing the display device 10 among the multiple viewers, and specifically includes:

S501: Set a sequence value for each viewer according to the order from earliest to latest of the start time of each viewer viewing the display device.

Exemplarily, the display device 10 sets a sequence value for each viewer according to the order of the start time of each viewer watching the display device from early to late. Specifically, the processor 25 in the display device 10 sets a sequence value for each viewer according to the order of the start time of each viewer watching the display device from early to late.

Exemplarily, in step S101, the processor 25 of the display device 10 receives the data of viewer 1, viewer 2, and viewer 3 acquired by the face detector 24 of the display device 10, wherein the data of viewer 1 includes the start time t1 of viewer 1 viewing the display device 10; the data of viewer 2 includes the start time t2 of viewer 2 viewing the display device 10; the data of viewer 3 includes the start time t3 of viewer 3 viewing the display device 10, wherein the t1 is earlier than the t2 and the t3. Then, the processor 25 sets a sequence value of 1 to viewer 1 according to the start time t1 of viewer 1 viewing the display device, the processor 25 sets a sequence value of 2 to viewer 2 according to the start time t2 of viewer 2 viewing the display device, and the processor 25 sets a sequence value of 3 to viewer 3 according to the start time t3 of viewer 3 viewing the display device.

S502: Determine the priority level of each viewer according to the sequence value of each viewer.

Among them, the viewer's priority level is negatively correlated with the viewer's order value.

Exemplarily, the display device 10 determines the priority level of each viewer based on the order value of each viewer, wherein the priority level of the viewer is negatively correlated with the order value of the viewer. Specifically, the processor 25 in the display device 10 determines the priority level of each viewer based on the order value of each viewer, wherein the priority level of the viewer is negatively correlated with the order value of the viewer.

According to step S501, processor 25 determines that the order value of viewer 1 is 1, the order value of viewer 2 is 2, and the order value of viewer 3 is 3, 1<2<3, wherein the priority level of the viewer is negatively correlated with the order value of the viewer, then processor 25 determines that the priority level of viewer 1 is 1 based on the order value of viewer 1, which is the highest priority level; processor 25 determines that the priority level of viewer 2 is 2 based on the order value of viewer 2, which is the second highest priority level; processor 25 determines that the priority level of viewer 3 is 3 based on the order value of viewer 3, which is the third highest priority level.

Then in step S103, based on the priority level of viewer 1, the priority level of viewer 2, and the priority level of viewer 3, two designated viewers with high priority levels are determined from viewer 1, viewer 2, and viewer 3, specifically, viewer 1 and viewer 2 with high priority levels are determined as designated viewers. The display device 10 displays stereoscopic images to viewer 1 and viewer 2, and the display device 10 does not display stereoscopic images to viewer 3.

Then, step S104 and step S105 may be executed, and the display device 10 displays the stereoscopic image to the two designated viewers.

Specifically, the viewer data includes the viewer's gesture information. As shown in FIG. 18 , step S102 determines the priority level of each viewer according to the gesture information of each viewer among the multiple viewers, and specifically includes:

S601: Obtain preset gesture information.

Exemplarily, the display device 10 obtains the preset gesture information, specifically, the face detector 24 in the display device 10 obtains the preset gesture information. For example, the face detector 24 uses the gesture information of the viewer in the image within the field of view angle obtained at a predetermined time as multiple preset gesture information, and transmits the preset gesture information to the processor 25 of the display device 10, wherein the processor 25 in the display device 10 receives the preset gesture information, and further, the processor 25 of the display device 10 stores the received preset gesture information locally, such as in a storage unit. The predetermined time is, for example, the configuration time of the display device 10.

In other embodiments, the processor 25 of the display device 10 may receive preset gesture information transmitted from an external device to the display device 10, which is not limited in the embodiments of the present application. For example, the display device 10 may receive preset gesture information input by an administrator of the display device 10.

S602: Match the gesture information of each viewer among the multiple viewers with the preset gesture information to determine the priority level of each viewer.

The priority level of viewers who are successfully matched is higher than the priority level of viewers who are unmatched.

Exemplarily, the display device 10 matches the gesture information of each viewer among multiple viewers with the preset gesture information, and determines the priority level of each viewer, wherein the priority level of the viewer who successfully matches is higher than the priority level of the viewer who fails to match; specifically, the processor 25 in the display device 10 matches the gesture information of each viewer among multiple viewers with the preset gesture information, and determines the priority level of each viewer, wherein the priority level of the viewer who successfully matches is higher than the priority level of the viewer who fails to match.

Exemplarily, the display device 10 displays a prompt message, which is "If you need to watch a stereoscopic image, show the following gesture <preset gesture information>", for example, the preset gesture information of the display device 10 is "raise your hand". In step S101, the processor 25 of the display device 10 receives the data of viewer 1, viewer 2, and viewer 3 acquired by the face detector 24 of the display device 10. The data of viewer 1 includes the gesture information of viewer 1, and the gesture information of viewer 1 is "raise your hand". Then the processor 25 of the display device 10 matches the gesture information "raise your hand" of viewer 1 with the preset gesture information "raise your hand", and the obtained matching result of viewer 1 is a successful match, indicating that viewer 1 needs to watch a stereoscopic image. The data of viewer 2 includes the gesture information of viewer 2, and the gesture information of viewer 2 is "raise your hand". Then the processor 25 of the display device 10 matches the gesture information "raise your hand" of viewer 2 with the preset gesture information "raise your hand", and the obtained matching result of viewer 2 is a successful match, indicating that viewer 2 needs to watch a stereoscopic image. The data of viewer 3 includes the gesture information of viewer 3. The gesture information of viewer 3 is “Yay”. Then the processor 25 of the display device 10 matches the gesture information “Yay” of viewer 3 with the preset gesture information “raise hand”. The matching result of viewer 3 obtained is a matching failure, indicating that viewer 3 does not need to watch the stereoscopic image.

The processor 25 determines that the priority level of viewer 1 is 1 based on the successful matching of the gesture information of viewer 1 with the preset gesture information, the processor 25 determines that the priority level of viewer 2 is 1 based on the successful matching of the gesture information of viewer 2 with the preset gesture information, and the processor 25 determines that the priority level of viewer 3 is null based on the failure of matching the gesture information of viewer 3 with the preset gesture information. The priority level of viewer 1 is higher than the priority level of viewer 3, and the priority level of viewer 2 is higher than the priority level of viewer 3. Then in step S103, based on the priority level of viewer 1, the priority level of viewer 2 and the priority level of viewer 3, two designated viewers with high priority levels are determined from viewer 1, viewer 2 and viewer 3, specifically, the two viewers with high priority levels, viewer 1 and viewer 2, are determined as designated viewers. The display device 10 displays stereoscopic images to viewer 1 and viewer 2, and the display device 10 does not display stereoscopic images to viewer 3.

Then, step S104 and step S105 may be executed, and the display device 10 displays the stereoscopic image to the two designated viewers.

Exemplarily, in the above embodiments, determining the priority level of each viewer according to facial information of each viewer among multiple viewers, determining the priority level of each viewer according to location information of each viewer among multiple viewers, determining the priority level of each viewer according to the start time of each viewer among multiple viewers watching the display device, and determining the priority level of each viewer according to gesture information of each viewer among multiple viewers are separately described. In other embodiments, the processor in the display device 10 can combine any two or more of the following to determine the priority level of the viewer.

For example, the weighted value of the viewer's priority level determined according to the viewer's location information and the viewer's priority level determined according to the start time of the viewer viewing the display device is used as the viewer's priority level. Exemplarily, the weighted value of the viewer's priority level determined according to the viewer's location information is 0.9, and the weighted value of the viewer's priority level determined according to the start time of the viewer viewing the display device is 0.1. Assuming that the viewer 1's location information determines that the viewer 1's priority level is 1, and the viewer 1's priority level is determined to be 1 according to the start time of the viewer 1 viewing the display device, then the viewer 1's priority level is specifically 1*0.9+1*0.1=1. The viewer 2's location information determines that the viewer 2's priority level is 2, and the viewer 2's priority level is determined to be 2 according to the start time of the viewer 2 viewing the display device, then the viewer 1's priority level is specifically 2*0.9+2*0.1=2. The position information of viewer 3 determines that the priority level of viewer 2 is 2, and the priority level of viewer 2 is determined to be 3 according to the start time of viewer 2 viewing the display device, wherein the priority level of viewer 1 is specifically 2*0.9+3*0.1=2.1. The smaller the value, the higher the priority level, so the priority level of viewer 1 is higher than the priority level of viewer 2, which is equal to higher than the priority level of viewer 3.

As shown in FIG19 , an embodiment of the present application further provides a display device 30, which includes an acquisition module 301, a processing module 302, a backlight module 303 and a display module 304, wherein the backlight module 303 includes a plurality of backlight units; the acquisition module 301 is used to acquire data of a plurality of viewers viewing the display device 30; the processing module 302 is used to determine the priority level of each of the plurality of viewers according to the data of each of the plurality of viewers acquired by the acquisition module 301; the priority level of the viewer is used to characterize the priority of displaying an image to the viewer; the processing module 302 is used to determine the priority level of each of the plurality of viewers according to the data of each of the plurality of viewers acquired by the acquisition module 301; the priority level of the viewer is used to characterize the priority of displaying an image to the viewer; the processing module Block 302 is further used to determine M designated viewers with high priority levels from multiple viewers based on the priority levels of multiple viewers, where M is a positive integer and is less than or equal to the maximum number of viewers supported by the display device; a backlight module 303 is used to turn on the backlight unit corresponding to the left eye of each designated viewer among the multiple backlight units; a display module 304 is used to display a left-eye image based on the backlight unit corresponding to the left eye; the backlight module 303 is further used to turn on the backlight unit corresponding to the right eye of each designated viewer among the multiple backlight units; and the display module 304 is further used to display a right-eye image based on the backlight unit corresponding to the right eye.

Exemplarily, the viewer's data includes one or more of the following: viewer's facial information, viewer's location information, the start time of the viewer watching the display device 30, and viewer's gesture information.

Exemplarily, the viewer's data includes the viewer's facial information, and the acquisition module 301 is also used to obtain multiple preset facial information; wherein each of the multiple preset facial information is correspondingly set with a priority level; the processing module 302 is also used to match the viewer's facial information with each preset facial information; the processing module 302 is also used to determine the viewer's priority level based on the priority level of the preset facial information matched by the viewer.

Exemplarily, the priority levels set corresponding to any two preset facial information are the same or different.

Exemplarily, the viewer's data includes the viewer's location information; the processing module 302 is further used to determine the viewing area where the viewer is located based on the viewer's location information; wherein the viewing area includes multiple viewing areas, and the multiple viewing areas are obtained by dividing the display area corresponding to the display device 30, and each viewing area in the multiple viewing areas is correspondingly set with a priority level; the processing module 302 is further used to determine the viewer's priority level based on the priority level of the viewing area where the viewer is located.

Exemplarily, the priority level of a viewing area at the center of the display area is higher than the priority level of a viewing area at other locations of the display area except the center.

Exemplarily, the viewer's data includes the viewer's location information; the processing module 302 is also used to determine the distance between each viewer and the reference point based on the location information of each viewer among the multiple viewers and the location information of the reference point; the processing module 302 is also used to determine the priority level of each viewer based on the distance between each viewer and the reference point, wherein the viewer's priority level is negatively correlated with the distance between the viewer and the reference point.

Optionally, the viewer's data includes the start time of the viewer watching the display device 30; the processing module 302 is also used to set a sequence value for each viewer according to the start time of each viewer watching the display device 30 in order from early to late; the processing module 302 is also used to determine the priority level of each viewer according to the sequence value of each viewer, wherein the priority level of the viewer is negatively correlated with the sequence value of the viewer.

Optionally, the viewer's data includes the viewer's gesture information; the acquisition module 301 is also used to obtain preset gesture information; the processing module 302 is also used to match the gesture information of each viewer among multiple viewers with the preset gesture information, and determine the priority level of each viewer, wherein the priority level of a viewer who successfully matches is higher than the priority level of a viewer who fails to match.

Exemplarily, the display device 30 further includes an optical module 305 , and the optical module 305 has a field of view angle; the maximum number of viewers is positively correlated with the field of view angle of the optical module 305 ; and the maximum number of viewers is positively correlated with the number of the plurality of backlight units.

Exemplarily, the backlight module 303 is further used to sequentially turn on the backlight unit corresponding to the left eye of each designated viewer among the multiple backlight units in a preset order; the backlight module 303 is further used to sequentially turn on the backlight unit corresponding to the right eye of each designated viewer among the multiple backlight units in a preset order.

Exemplarily, the viewer's data includes the start time of the viewer viewing the display device 30 ; the preset order is the order from early to late according to the start time of viewing the display device 30 .

Exemplarily, the display device 30 further includes a storage module 306. The storage module 306 is used to store computer-executable instructions, and other units in the computing device can perform corresponding actions according to the computer-executable instructions stored in the storage module 306.

For the detailed description of the above exemplary manner, please refer to the above method embodiment, which will not be repeated here. In addition, the explanation of any display device 30 provided above and the description of the beneficial effects can refer to the above corresponding method embodiment, which will not be repeated here.

The embodiment of the present application also provides a computer-readable storage medium, in which a computer program code is stored. When the computer executes the computer program code, the computer executes the control method of the display device in the above embodiment. Based on such an understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program codes.

The embodiments of the present application further provide a computer program product. When the computer program product is run on a computer, the computer is enabled to execute the above-mentioned related steps to implement the control method of the display device in the above-mentioned embodiment.

In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. The above content is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Although the present application has been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely exemplary illustrations of the present application as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims (27)

1. A control method for a display device, characterized in that the display device comprises a backlight module, and the backlight module comprises a plurality of backlight units; the method comprises: Acquiring data of a plurality of viewers viewing the display device; Determining a priority level of each of the plurality of viewers according to data of each of the plurality of viewers; the priority level of the viewer is used to characterize the priority of displaying images to the viewer; Based on the priority levels of the plurality of viewers, determining M designated viewers with high priority levels from the plurality of viewers, where M is a positive integer and is less than or equal to the maximum number of viewers supported by the display device; Turning on a backlight unit corresponding to a left eye of each designated viewer among the plurality of backlight units, and displaying a left-eye image based on the backlight unit corresponding to the left eye; The backlight unit corresponding to the right eye of each designated viewer among the plurality of backlight units is turned on, and a right eye image is displayed based on the backlight unit corresponding to the right eye. 2. The control method of the display device according to claim 1, characterized in that: The viewer data includes one or more of the following: facial information of the viewer, location information of the viewer, start time of the viewer watching the display device, and gesture information of the viewer. 3. The control method of the display device according to claim 2, characterized in that the viewer data includes facial information of the viewer; and determining the priority level of each viewer according to the facial information of each of the plurality of viewers comprises: Acquire multiple preset face information; wherein each preset face information in the multiple preset face information is correspondingly set with a priority level; For any of the viewers, matching the face information of the viewer with each of the preset face information; The priority level of the viewer is determined according to the priority level of the preset facial information matched by the viewer. 4. The control method of the display device according to claim 3, characterized in that: The priority levels set corresponding to any two of the preset facial information are the same or different. 5. The control method of the display device according to claim 2, characterized in that the viewer data includes the viewer's position information; and determining the priority level of each viewer according to the position information of each of the plurality of viewers comprises: For any of the viewers, determining a viewing area where the viewer is located according to the position information of the viewer; wherein the viewing area includes a plurality of viewing areas, the plurality of viewing areas are obtained by dividing a display area corresponding to the display device, and each of the plurality of viewing areas is correspondingly set with a priority level; The priority level of the viewer is determined according to the priority level of the viewing area where the viewer is located. 6. The control method of the display device according to claim 5, characterized in that: The priority level of the viewing area located at the center of the display area is higher than the priority level of the viewing area located at other positions of the display area except the center. 7. The control method of the display device according to claim 2, characterized in that the viewer data includes the viewer's position information; and determining the priority level of each viewer according to the position information of each of the plurality of viewers comprises: Determine the distance between each of the viewers and the reference point according to the position information of each of the viewers and the position information of the reference point; The priority level of each viewer is determined according to the distance between each viewer and the reference point, wherein the priority level of the viewer is negatively correlated with the distance between the viewer and the reference point. 8. The control method of a display device according to claim 2, wherein the viewer data includes a start time of the viewer viewing the display device; and determining the priority level of each viewer according to the start time of each of the plurality of viewers viewing the display device comprises: Setting a sequence value for each of the viewers according to the order from earliest to latest of the start time of each of the viewers viewing the display device; The priority level of each viewer is determined according to the order value of each viewer, wherein the priority level of the viewer is negatively correlated with the order value of the viewer. 9. The control method of a display device according to claim 2, wherein the viewer data includes gesture information of the viewer; and determining the priority level of each viewer according to the gesture information of each of the plurality of viewers comprises: Get preset gesture information; The gesture information of each of the multiple viewers is matched with the preset gesture information to determine the priority level of each viewer, wherein the priority level of the viewer who successfully matches is higher than the priority level of the viewer who fails to match. 10. The control method of a display device according to any one of claims 1 to 9, characterized in that the display device further comprises an optical lens, and the optical lens has a field of view angle; The maximum number of viewers is positively correlated with the field of view of the optical lens; The number of the maximum viewers is positively correlated with the number of the plurality of backlight units. 11. The control method of a display device according to any one of claims 1 to 10, characterized in that: The step of turning on the backlight unit corresponding to the left eye of the designated viewer among the plurality of backlight units comprises: Turning on the backlight unit corresponding to the left eye of each designated viewer in the plurality of backlight units in sequence according to a preset order; The step of turning on the backlight unit corresponding to the right eye of the designated viewer among the plurality of backlight units comprises: The backlight unit corresponding to the right eye of each designated viewer among the plurality of backlight units is turned on in sequence according to the preset order. 12. The control method of the display device according to claim 11, characterized in that: The viewer data includes the start time of the viewer viewing the display device; The preset order is an order from early to late according to the start time of viewing the display device. 13. A computer-readable storage medium, characterized in that it comprises computer instructions, and when the computer instructions are executed on a computer, the computer executes the control method of the display device according to any one of claims 1 to 12. 14. A computer program product, characterized in that when the computer program product is run on a computer, the computer is enabled to execute the method for controlling a display device according to any one of claims 1 to 12. 15. A display device, characterized in that the display device comprises an acquisition module, a processing module, a backlight module and a display module, and the backlight module comprises a plurality of backlight units; The acquisition module is used to acquire data of multiple viewers who are viewing the display device; The processing module is used to determine the priority level of each of the multiple viewers according to the data of each of the multiple viewers acquired by the acquisition module; the priority level of the viewer is used to represent the priority of displaying images to the viewer; The processing module is further used to determine M designated viewers with high priority levels from the multiple viewers based on the priority levels of the multiple viewers, where M is a positive integer and is less than or equal to the maximum number of viewers supported by the display device; The backlight module is used to turn on the backlight unit corresponding to the left eye of each designated viewer among the plurality of backlight units; The display module is used to display a left-eye image based on the backlight unit corresponding to the left eye; The backlight module is further used to turn on the backlight unit corresponding to the right eye of each designated viewer among the plurality of backlight units; The display module is further used to display a right-eye image based on the backlight unit corresponding to the right eye. 16. The display device according to claim 15, characterized in that The viewer data includes one or more of the following: facial information of the viewer, location information of the viewer, start time of the viewer watching the display device, and gesture information of the viewer. 17. The display device according to claim 16, wherein the viewer data comprises face information of the viewer; The acquisition module is further used to acquire a plurality of preset face information; wherein each of the plurality of preset face information is correspondingly provided with a priority level; The processing module is further used to match the facial information of the viewer with each of the preset facial information; The processing module is further used to determine the priority level of the viewer according to the priority level of the preset facial information matched by the viewer. 18. The display device according to claim 17, characterized in that The priority levels set corresponding to any two of the preset facial information are the same or different. 19. The display device according to claim 16, wherein the viewer data comprises location information of the viewer; The processing module is further used to determine a viewing area where the viewer is located according to the position information of the viewer; wherein the viewing area includes a plurality of viewing areas, the plurality of viewing areas are obtained by dividing a display area corresponding to the display device, and each of the plurality of viewing areas is correspondingly set with a priority level; The processing module is further configured to determine the priority level of the viewer according to the priority level of the viewing area where the viewer is located. 20. The display device according to claim 19, characterized in that The priority level of the viewing area located at the center of the display area is higher than the priority level of the viewing area located at other positions of the display area except the center. 21. The display device according to claim 16, wherein the viewer data comprises location information of the viewer; The processing module is further used to determine the distance between each of the viewers and the reference point according to the position information of each of the viewers and the position information of the reference point; The processing module is further configured to determine a priority level of each viewer according to a distance between each viewer and the reference point, wherein the priority level of the viewer is negatively correlated with the distance between the viewer and the reference point. 22. The display device according to claim 16, characterized in that the viewer's data comprises a start time when the viewer watches the display device; The processing module is further used to set a sequence value for each of the viewers according to the order from earliest to latest of the start time of each of the viewers viewing the display device; The processing module is further configured to determine a priority level of each viewer according to the sequence value of each viewer, wherein the priority level of the viewer is negatively correlated with the sequence value of the viewer. 23. The display device according to claim 16, wherein the viewer data comprises gesture information of the viewer; The acquisition module is also used to acquire preset gesture information; The processing module is further used to match the gesture information of each of the multiple viewers with the preset gesture information, and determine the priority level of each viewer, wherein the priority level of the viewer who successfully matches is higher than the priority level of the viewer who fails to match. 24. The display device according to any one of claims 15 to 23, characterized in that the display device further comprises an optical module, and the optical module has a field of view angle; The maximum number of viewers is positively correlated with the field of view of the optical module; The number of the maximum viewers is positively correlated with the number of the plurality of backlight units. 25. The display device according to any one of claims 15 to 24, characterized in that: The backlight module is further used to sequentially turn on the backlight unit corresponding to the left eye of each designated viewer among the plurality of backlight units according to a preset order; The backlight module is further used to sequentially turn on the backlight unit corresponding to the right eye of each designated viewer among the plurality of backlight units according to the preset order. 26. The display device according to claim 25, characterized in that The viewer data includes the start time of the viewer viewing the display device; The preset order is an order from early to late according to the start time of viewing the display device. 27. A display device, characterized in that the display device comprises a face detector, a processor, a backlight module and a display panel, and the backlight module comprises a plurality of backlight units; The face detector is used to obtain data of multiple viewers viewing the display device; The processor is used to determine the priority level of each of the multiple viewers according to the data of each of the multiple viewers acquired by the face detector; the priority level of the viewer is used to represent the priority of displaying images to the viewer; The processor is further configured to determine, based on the priority levels of the plurality of viewers, M designated viewers with high priority levels from the plurality of viewers, where M is a positive integer and is less than or equal to a maximum number of viewers supported by the display device; The backlight module is used to turn on the backlight unit corresponding to the left eye of each designated viewer among the plurality of backlight units; The display panel is used to display a left-eye image based on the backlight unit corresponding to the left eye; The backlight module is further used to turn on the backlight unit corresponding to the right eye of each designated viewer among the plurality of backlight units; The display panel is further used to display a right eye image based on the backlight unit corresponding to the right eye.