CN104216130A - Naked eye 3D display method, device and system with adjustable depth of visual area - Google Patents

Abstract

The invention discloses a naked-eye 3D display method, device and system with a deep viewing zone. The method includes: arranging several light-emitting modules along a direction perpendicular to the image display layer, and the light-emitting modules correspond to a viewing zone; detecting both eyes The observation distance between the image display layer and the observation position of the two eyes is obtained; according to the observation position, the light-emitting module corresponding to the viewing area where the two eyes are located is selected for projection. The present invention selects a suitable light-emitting module by detecting the observation distance between the eyes and the image display layer, so that the viewing area corresponding to the light-emitting module is at the position of the eyes.

Description

A naked-eye 3D display method, device and system with depth viewing area

technical field

The invention belongs to the field of stereoscopic image display, and specifically discloses a naked-eye 3D display method, device and system with a depth viewing area.

Background technique

Glasses-free 3D display, as an inevitable technology for the development of the display field, has attracted the attention of scientific research, industry and entertainment circles. The mainstream naked-eye 3D display technologies mainly include the mainstream architecture of naked-eye 3D display based on cylindrical lenses or gratings. Through the directional transmission of images, parallax images are provided to both eyes. After the left and right eye parallax images enter the left and right eye images respectively, after being fused by the brain, the viewer can see a three-dimensional picture.

At present, the naked-eye 3D display technology based on cylindrical lenses or gratings generally has a sweet spot in the viewing area, that is, there is an optimal viewing distance for the left and right eyes at the same time. The best quality stereoscopic images can only be seen by the viewer within a short distance before and after the optimum viewing distance. However, when the user watches away from this optimal viewing distance, both the crosstalk rate and the image uniformity will be deteriorated to a certain extent, so that the image quality of the 3D image is greatly reduced. This severely limits the viewing freedom of the viewer.

Contents of the invention

Aiming at the deficiencies of the prior art, the object of the present invention is to provide a naked-eye 3D display method, device and system with a depth viewing area, aiming to solve the problem existing in the field of 3D display that only within a certain range can obtain better Technical flaws of stereoscopic images.

For this reason, the technical scheme adopted by the naked-eye 3D display method with depth viewing area described in the present invention is as follows:

A naked-eye 3D display method with a deep viewing zone, comprising the following steps:

A plurality of light-emitting modules are arranged at different distances along a direction perpendicular to the image display layer, and each distance light-emitting module corresponds to a viewing area with a different observation distance, and all the light-emitting modules form a depth viewing area;

At a position close to the image display layer, a light beam shaping diffuser layer (LSD) is arranged to increase the uniformity of image display, and a lens array unit is also arranged.

Detecting the relative position between the two eyes and the image display layer to obtain the observation position of the two eyes, wherein the light sources corresponding to the left and right eyes need to cooperate with the refreshing state of the left and right eye parallax images of the image display unit;

According to the observation position, the light-emitting module corresponding to the viewing area where the two eyes are located is selected for projection to form viewing areas of different depths.

As a preferred technical solution, the method further includes: adjusting the light emitting unit of the light emitting module according to the observation position.

The light-emitting state of the light-emitting unit corresponding to each viewing area needs to be synchronized with the refresh state of the parallax image of the image display unit.

The present invention also provides a technical solution of a naked-eye 3D display device with a depth viewing area as follows:

A naked-eye 3D display device with a depth viewing area, comprising:

The configuration module is used to configure several light-emitting modules at different distances along the direction perpendicular to the image display layer, and configure a lens unit array and a light beam shaping diffuser (LSD) at a position close to the image display layer. The light emitting modules at each distance The modules correspond to a viewing area with different viewing distances; all the light emitting modules form a deep viewing area.

The detection module is used to detect the relative position between the two eyes and the image display layer to obtain the observation positions of the two eyes. Among them, the light sources corresponding to the left and right eyes need to cooperate with the refreshing state of the left and right eye parallax images of the image display unit;

The adjustment module is used to select, according to the observation position, the light-emitting modules corresponding to the viewing areas where the two eyes are located for projection, so as to form viewing areas of different depths.

The present invention also provides a technical scheme of a naked-eye 3D display system with a depth viewing zone as follows:

A naked-eye 3D display system with a depth viewing area, comprising a backlight unit, a light beam shaping diffuser (LSD), a lens unit array, an image display layer, and a distance detection module for detecting the distance between the eyes and the image display layer ,

The side of the image display layer close to the backlight unit is provided with a beam shaping diffuser (LSD) and a lens unit array;

The light beam shaping diffuser (LSD) is a film layer capable of weakly diffusing light in one direction and strongly diffusing in an orthogonal direction.

The backlight unit includes several light-emitting modules arranged along a direction perpendicular to the image display layer, and the distance detection module is connected to the light-emitting modules of the backlight unit.

The light-emitting module includes several light-emitting units, and the combination of the light-emitting units forms an arc-shaped light-emitting curved surface.

As a preferred technical solution, the lens unit array includes a single or multiple lenses.

As a preferred technical solution, the lens unit array includes a Fresnel lens array.

As a preferred technical solution, the image display unit includes a transmissive display panel.

As a preferred technical solution, a polarizing film layer is further included, and the polarizing film layer is arranged between the backlight unit and the image display layer.

As a preferred technical solution, the polarizing film layer is arranged on a side of the light-emitting module close to the image display layer, and/or on a side of the lens unit array close to the light-emitting module side.

The naked-eye 3D display method, device and system with depth viewing area according to the present invention selects a suitable light-emitting module by detecting the observation distance between the eyes and the image display layer, so that the viewing area corresponding to the light-emitting module is in the position of the two eyes. Location. The light-emitting module can be automatically adjusted again during the movement of the eyes, and the best quality stereoscopic images can always be obtained during the viewing process, improving the viewing freedom of the observer.

Description of drawings

FIG. 1 is a schematic flowchart of an embodiment of a naked-eye 3D display method with a depth viewing area according to the present invention;

Fig. 2 is a structural schematic diagram of an embodiment of a naked-eye 3D display device with a depth viewing area according to the present invention;

Fig. 3a is a structural schematic diagram of an embodiment of a naked-eye 3D display system with a depth viewing area according to the present invention, in which both eyes are at a position closer to the image display layer;

Fig. 3b is a structural schematic diagram of an embodiment of a naked-eye 3D display system with a depth viewing area according to the present invention, in which both eyes are at a position far from the image display layer;

Fig. 4 is a structural schematic diagram of another embodiment of a naked-eye 3D display system with a depth viewing area according to the present invention;

Fig. 5 is a structural schematic diagram of another embodiment of a naked-eye 3D display system with a depth viewing area according to the present invention;

In the picture:

10: backlight unit; 11: first light emitting module; 111: first light emitting unit; 112: second light emitting unit; 12: second light emitting module; 121: third light emitting unit; 122: fourth light emitting unit; 21: light beam shaping diffuser (LSD); 22: lens unit array; 23: image display layer; 24: polarizing film layer; 30: viewing area unit; 41: right eye; 42: left eye.

Detailed ways

Several embodiments of the present invention will be further described below in conjunction with the accompanying drawings. The method, device and system involved in the embodiments of the present invention select the corresponding light-emitting module for projection by detecting the distance between the eyes (such as human eyes) and the image display layer 23, so that the position of the eyes is within the viewing area of the 3D display, Therefore, a good 3D display picture can be given to the observer.

Referring to FIG. 1 , FIG. 1 is a schematic flowchart of an embodiment of a naked-eye 3D display method with a depth viewing area according to the present invention. In the embodiment shown in Figure 1, the method includes:

Step S101: arranging several light emitting modules at different distances along a direction perpendicular to the image display layer, each distance light emitting module corresponds to a viewing area with a different observation distance, and all the light emitting modules form a depth viewing area;

At the position close to the image display layer, a light beam shaping diffuser layer (LSD) is arranged to increase the uniformity of image display.

Step S102: Detect the observation distance between the two eyes and the image display layer 23, and obtain the observation positions of the two eyes;

Step S103: According to the observation position, select the light-emitting module corresponding to the viewing area where the two eyes are located for projection.

In some preferred embodiments, it further includes adjusting the light emitting unit of the light emitting module according to the observation position. The 3D display method involved in this embodiment can select a corresponding light-emitting module according to the positions of the two eyes, so that the positions of the two eyes are within the viewing area of the 3D display. When the positions of both eyes (such as human eyes) move back and forth, the new positions of the human eyes are re-judged. By changing the brightness and darkness of the backlight at different depth levels, the "best viewing distance adjustable naked-eye 3D display" can be realized.

Referring to FIG. 2 , FIG. 2 is a schematic structural diagram of an embodiment of a naked-eye 3D display device with a depth viewing area according to the present invention. In the embodiment shown in FIG. 2, the naked-eye 3D display device with a depth viewing area includes:

The configuration module 201 is used to configure several light-emitting modules at different distances along the direction perpendicular to the image display layer, and configure a lens unit array and a light beam shaping diffuser (LSD) at a position close to the image display layer. The light-emitting modules correspond to a viewing area with different observation distances; all the light-emitting modules form a deep viewing area;

A detection module 202, configured to detect the observation distance between the two eyes and the image display layer 23, and obtain the observation positions of the two eyes;

The adjustment module 203 is configured to select the light-emitting module corresponding to the viewing area where the two eyes are located for projection according to the observation position.

The device arranges the light-emitting modules along a direction perpendicular to the image display layer 23 by configuring the modules. When in use, the relative position between the two eyes and the image display layer 23 is detected by the detection module to obtain the observation position of the two eyes, and then the corresponding light-emitting module is selected by the adjustment module, so that the position of the two eyes is in the position of the 3D display within the viewing area. When the positions of both eyes (such as human eyes) move back and forth, the new positions of the human eyes are re-judged. By changing the brightness and darkness of the backlight at different depth levels, the "best viewing distance adjustable naked-eye 3D display" can be realized, that is, the naked-eye 3D display with a deep viewing area can be realized.

Referring to Fig. 3a and Fig. 3b, Fig. 3a is a structural schematic diagram of an embodiment of a naked-eye 3D display system with a depth viewing area according to the present invention, in which both eyes are in a position closer to the image display layer 23; Fig. 3b is the present invention A structural schematic diagram of an embodiment of a naked-eye 3D display system with a depth viewing area described in the invention, in which both eyes are located far away from the image display layer 23 . In the implementation of a naked-eye 3D display system with a depth viewing area shown in FIG. 3a and FIG. 3b, it includes a backlight unit 10, an image display layer 23, and an For the distance detection module, the side of the image display layer 23 close to the backlight unit 10 is provided with a light beam shaping diffuser (LSD) 21 and a lens unit array 22 .

The backlight unit 10 includes several light-emitting modules, and the light-emitting modules are arranged along a direction perpendicular to the image display layer 23, that is, the light-emitting modules are arranged along a direction far from the image display layer 23, and each light-emitting module The groups have different distances from the image display layer 23 . Therefore, the distance between the viewing area corresponding to each light emitting module and the image display layer 23 is also different. For the convenience of illustration, in the embodiment shown in Fig. 3a and Fig. 3b, the backlight unit 10 only shows two light emitting modules arranged along the direction perpendicular to the image display layer 23: the first light emitting module 11 and the second light emitting module Light emitting modules 12, wherein the first light emitting module 11 is farther away from the image display layer 23, and the second light emitting module 12 is closer to the image display layer 23. However, in practical applications, the number of light emitting modules can be set according to actual conditions, which is not limited in the present invention.

In this embodiment, each backlight module includes several light-emitting units, and the bright and dark states and switch states of each light-emitting unit can be independently controlled. These light emitting units in the backlight module are distributed in an arc along the curved surface. The backlight module is used to provide illumination, and the light-emitting unit in the backlight module is also used to cooperate with the light beam shaping diffuser (LSD) 21 and the lens unit array 22 to form a viewing area. Similarly, for the convenience of illustration, the first light emitting module 11 in the embodiment in Fig. 3a and Fig. 3b only shows the first light emitting unit 111 and the second light emitting unit 112, and the second light emitting module 12 only shows the third The light emitting unit 121 and the fourth light emitting unit 122 . However, in practical applications, the number of light emitting units of the light emitting module can be set according to actual conditions, which is not limited in the present invention.

The light emitted by the light emitting unit passes through the light beam shaping diffuser (LSD) 21 , the lens unit array 22 and the image display unit to form a corresponding viewing area unit 30 . The viewing area formed by the adjacent light-emitting units of the same backlight module in cooperation with the diffusion film layer and the lens unit array 22 should be continuous and uninterrupted.

The image display layer 23 is a transmissive display panel. In this embodiment, it is a liquid crystal panel for alternately displaying parallax images in a time-division manner. The liquid crystal panel is arranged in front of the optical film layer,

The diffusion film layer can be a weak diffusion film layer, or a one-dimensional but strong diffusion film layer in the orthogonal dimension, or a film layer with a combination of the functions of the above two film layers, which is used to make the screen display effect more uniform and achieve Optimize the brightness uniformity of the viewing area and the effect of expanding the viewing angle.

The lens unit array 22 includes an array formed by single or multiple lenses, such as a Fresnel lens array.

Wherein, the positions of the diffusion film layer and the lens unit array 22 can be interchanged, and in this embodiment, the diffusion film layer is placed on the side close to the backlight source.

The distance detection module is used to detect the distance between the eyes and the image display layer 23, and is connected with the light emitting module. The distance detection module may recognize and detect human eyes or faces, for example, it may be a face recognition module or a human eye recognition module.

In the embodiment shown in Fig. 3a, after the light emitted by the first light-emitting unit 111 passes through the diffusion film layer and the lens unit array 22, it cooperates with the image display layer 23 (liquid crystal panel) to load the left image, so that the main light beam of the left image passes to the left The viewing area where the eye 42 is located; similarly, the second light emitting unit 112 will form the right-eye image viewing area, forming the naked-eye 3D viewing area unit 30 suitable for close viewing. At the same time, in FIG. 3b, the first light-emitting unit 111 and the second light-emitting unit 112 are turned off, and the third light-emitting unit 121 and the fourth light-emitting unit 122 in another deep-level backlight module (second backlight module) are turned on. A naked-eye 3D viewing area unit 30 suitable for long-distance viewing is formed. By controlling the on and off of the light-emitting units in the backlight module of different depth levels, the adjustment of the optimal viewing distance is realized.

When a person is located near the image display layer 23 as shown in FIG. 3 a , the first light emitting unit 111 and the second light emitting unit 112 in the first backlight module are turned on. After the light from the first light emitting unit 111 and the second light emitting unit 112 passes through the light beam shaping diffuser (LSD), the lens unit and the image display layer 23 (ie, the liquid crystal display panel), the corresponding left and right eye viewing areas are respectively formed. Since the first light-emitting unit 111 and the second light-emitting unit 112 are far away from the light beam shaping diffuser (LSD), the lens unit, and the liquid crystal display panel, the viewing area formed is relatively close to the screen, which can meet the needs of people watching at a relatively short distance. Good stereoscopic images. Wherein, when the image display layer 23 (that is, the liquid crystal display panel) refreshes the left-eye image, the first light-emitting unit 111 is turned on, and the second light-emitting unit 112 is turned off, so that the left-eye main beam loads the left-eye image into the time zone where the left eye is located; When the image display layer 23 (liquid crystal display panel) refreshes the right-eye image, the first light-emitting unit 111 is turned off, and the second light-emitting unit 112 is turned on, so that the main beam of the right eye 41 loads the right-eye image into the time zone where the right eye 41 is located.

When the user's position moves back to the position shown in Figure 3b, the distance detection module (such as face recognition module or human eye recognition module) in the system recognizes that the left and right eyes of the user are gradually moving away from the screen, and judges The new positions of the user's left and right eyes. The third light-emitting unit 121 and the fourth light-emitting unit 122 in the second backlight module corresponding to the positions of the left and right eyes of the user cooperate with the diffusion film layer, the lens unit and the image display layer 23 to form corresponding left and right eye viewing areas, and project new , that is, projected in the viewport that is farther away from the screen. Wherein, when the image display layer 23 refreshes the left-eye image, the third light-emitting unit 121 is turned on, and the fourth light-emitting unit 122 is turned off, so that the left-eye main beam loads the left-eye image and passes into the time zone where the left eye 42 is located; when the image display layer 23 When refreshing the right-eye image, turn off the third light-emitting unit 121 and turn on the fourth light-emitting unit 122, so that the right-eye main beam loads the right-eye image and transmits to the time zone where the right eye 41 is located.

The embodiment shown in Figure 3a and Figure 3b only shows a structure composed of a lens unit, two backlight modules, a diffusion film layer, etc., but there may be multiple such structures in practical applications, as shown in Figure 4 In the stereoscopic effect display structure shown, the backlight unit 10 has multiple backlight modules.

As shown in FIG. 5 , FIG. 5 is a structural schematic diagram of another embodiment of a naked-eye 3D display system with a depth viewing area according to the present invention. In the embodiment shown in Fig. 5, the system can also set a polarizing film layer 24 in front of each light-emitting module, and at the same time set a corresponding polarizing film layer 24 in front of each lens unit, wherein the front of the adjacent backlight module The polarizing film layers 24 are different, and the polarizing film layers 24 attached to adjacent lens units are also different. Specifically as shown in FIG. 5 , taking one of the backlight modules as an example, by disposing polarizing film layers 24 in front of each backlight module, the polarizing film layers arranged in front of adjacent backlight modules are different and arranged alternately. The polarizing film layers arranged in front of adjacent lens unit arrays are also different and arranged alternately. The light emitted by each backlight module can pass through the corresponding lens unit, but it is difficult to pass through the adjacent lens unit. In this embodiment, the sequence of the film layers is arranged in the order of the polarizing film layer 24 , the light beam shaping diffuser (LSD), and the film layers of the lens unit array. But actually, the order of the above three film layers can be arbitrary.

It can be seen from the above several embodiments that the naked-eye 3D display method, device and system with a depth viewing area described in the present invention select a suitable light-emitting module by detecting the observation distance between the eyes and the image display layer 23, so that The viewing area corresponding to the light emitting module is at the position of both eyes. The light-emitting module can be automatically adjusted again during the movement of the eyes, and the best quality stereoscopic images can always be obtained during the viewing process, improving the viewing freedom of the observer.

It should be understood that the present invention is not limited to the above-mentioned embodiments, and any changes or modifications to the present invention do not depart from the spirit and scope of the present invention, provided that these changes and modifications belong to the claims and equivalent technical scope of the present invention, then The present invention is also meant to include such changes and modifications.

Claims (10)

1. A naked-eye 3D display method with a deep viewing zone, characterized in that, comprising the following steps: A number of light-emitting modules are arranged at different distances along the direction perpendicular to the image display layer, and each of the distance light-emitting modules corresponds to a viewing area with a different observation distance, and the light-emitting modules form a deep viewing area; in addition, near the image Display the position of the layer, configure the beam shaping diffusion film layer and the lens array unit; Detecting the relative position between the two eyes and the image display layer to obtain the observation position of the two eyes, wherein the light sources corresponding to the left and right eyes need to cooperate with the refreshing state of the left and right eye parallax images of the image display unit; According to the observation position, the light-emitting module corresponding to the viewing area where the two eyes are located is selected for projection to form viewing areas of different depths. 2 . The naked-eye 3D display method with depth viewing area according to claim 1 , further comprising: adjusting the light-emitting unit of the light-emitting module according to the viewing position. 3 . 3. A naked-eye 3D display device with a deep viewing zone, characterized in that it comprises: The configuration module is used to configure several light-emitting modules at different distances along the direction perpendicular to the image display layer, and arrange a lens unit array and a beam shaping diffuser at a position close to the image display layer. The light-emitting modules at each distance correspond to A viewing area with different viewing distances, all the light-emitting modules form a deep viewing area; The detection module is used to detect the relative position between the two eyes and the image display layer, and obtain the observation position of the two eyes, wherein, the light sources corresponding to the left and right eyes need to cooperate with the refreshing state of the parallax images of the left and right eyes of the image display unit; The adjustment module is used to select, according to the observation position, the light-emitting modules corresponding to the viewing areas where the two eyes are located for projection, so as to form viewing areas of different depths. 4. A naked-eye 3D display system with a deep viewing zone, comprising a backlight unit, a light beam shaping diffuser (LSD), a lens unit array, an image display layer and a distance for detecting the distance between both eyes and the image display layer The detection module is characterized in that: The side of the image display layer close to the backlight unit is provided with the beam shaping diffuser (LSD) and lens unit array; The backlight unit includes several light-emitting modules arranged along a direction perpendicular to the image display layer, and the distance detection module is connected to the light-emitting modules of the backlight unit. 5 . The naked-eye 3D display system with a deep viewing area according to claim 4 , wherein the light emitting module includes several light emitting units, and the combination of the light emitting units forms an arc-shaped light emitting surface. 6 . 6 . The naked-eye 3D display system with a depth viewing area according to claim 5 , wherein the lens unit array comprises a single lens or an array formed by multiple lenses. 7 . 7. The naked-eye 3D display system with a depth viewing area according to claim 6, wherein the lens unit array comprises a Fresnel lens array. 8. The naked-eye 3D display system with depth viewing area according to claim 4, wherein the image display unit comprises a transmissive display panel. 9. The naked-eye 3D display system with depth viewing area as claimed in claim 4, further comprising a polarizing film layer, the polarizing film layer being arranged between the backlight unit and the image display layer . 10. The naked-eye 3D display system with depth viewing area according to claim 9, characterized in that: the polarizing film layer is arranged on the side of the light-emitting module close to the image display layer, and/or On the side of the lens unit array close to the light emitting module.