CN207301514U - For obtaining the display screen of focal length cognition and wearing display device - Google Patents

Abstract

The utility model discloses a kind of display screen for obtaining focal length cognition and wear display device, the display screen includes display panel and original screen panel, the original screen panel includes spaced euphotic zone, the original screen panel is located at the front or behind of the display panel, the euphotic zone of the original screen panel is provided so that the light light splitting of display panel output is projected to two viewpoints, and between described two viewpoints be smaller than or the pupil diameter equal to human eye.Display screen according to the present utility model, can enable a viewer to obtain accurate focal length cognition when carrying out virtual reality experience by wearing display device, improve feeling of immersion.

Description

Display screen and head-mounted display device for focal distance awareness

technical field

The utility model relates to the field of optical technology, more specifically, the utility model relates to a display screen for obtaining focus recognition and a head-mounted display device.

Background technique

People's physical perception of three-dimensional images mainly depends on four factors, namely, the parallax of the left and right eye images of viewing objects, the angle of left and right eyes viewing objects (amplitude angle), the focus of eyes on objects when viewing objects, and motion parallax.

The current three-dimensional display of virtual reality equipment (Virtual Reality, VR) is mainly designed from the above three aspects of parallax, amplitude angle, and motion parallax, but it has to avoid accurate focal length cognition.

As shown in Figure 1a and Figure 1b, the role of focal length cognition is reflected in: when people look at the object A in front of them, the light reflected by the object A will form multiple images on the retinas of the left eye EL and right eye ER respectively. , in order to see the object A clearly, the brain will control the contraction of the eye muscles to deform the lens, and then combine multiple images to form a clear image. At the same time, the degree of contraction of the eye muscles will give the brain a feedback Information about the depth of focus, which is the vertical distance between the object (light source) A and the human eye.

For the virtual reality device, as shown in Figure 2, when the viewer watches the video through the virtual reality device, the light emitted by the homologous image points LA and RA representing the same object A in the left and right parallax images respectively enter the left eye EL, right eye ER, the viewer sees the stereoscopic image A' of the object A under the induction of the parallax images of the left and right eyes, and the stereoscopic image A' will be drawn closer to the display module DM that is drawn deeper by the lens module to a position closer to the viewer, where the vertical distance between the stereoscopic image A' and the human eye is the parallax angle depth Ad, while the focus obtained by the viewer through the focal length cognition falls on the point that is drawn deep by the lens module on the display module DM. This shows that for object A, its focus depth AD will be greater than the parallax angle depth Ad, and then it will not be possible to realize the accurate focus distance cognition that the parallax angle depth is consistent with the focus depth. It can also cause eye fatigue and, for some people, 3D dizziness. Therefore, it is very necessary to provide a solution that enables viewers to obtain accurate focal length perception through virtual reality equipment.

Utility model content

An object of the embodiments of the present invention is to provide a technical solution that enables the viewer to obtain accurate focal length perception.

According to the first aspect of the present utility model, there is provided a display screen for obtaining focus recognition, which includes a display panel and a grating panel, the grating panel includes light-transmitting strips arranged at intervals, and the grating panel is located in front of the display panel Or at the rear, the light transmission zone of the grating panel is set so that the light output by the display panel is split and projected to two viewpoints, and the distance between the two viewpoints is smaller than or equal to the pupil diameter of the human eye.

Optionally, the grating panel is a liquid crystal panel, and the grating panel is configured to form light-transmitting strips arranged at intervals by controlling the deflection of liquid crystal molecules.

Optionally, the grating panel forms each of the light-transmitting bands through light-transmitting gaps.

Optionally, the width of each light-transmitting zone of the grating panel enables light output by pixels in two adjacent rows or two adjacent columns of the display panel to be respectively projected to different viewpoints.

Optionally, the grating panel is located behind the display panel, and the display screen also includes a diffusion plate, which is located between the display panel and the grating panel; the diffusion direction of the diffusion plate, the red and green color of each pixel in the display panel The arrangement direction of the blue sub-pixels is consistent with the length extension direction of the light-transmissive strips of the grating panel.

According to the second aspect of the present invention, a head-mounted display device is also provided, including a window, a lens module and a display module, the lens module is located between the window and the display module, and the display module includes two According to the first aspect of the utility model, the display screens are respectively used as a left-eye display screen and a right-eye display screen, and the left-eye display screen and the right-eye display screen are arranged side by side in the left and right directions of the head-mounted display device; the left-eye display screen forms The two viewpoints formed by the display screen for the right eye are located at the position of the pupil of the left eye defined by the window, and the two viewpoints formed by the display screen for the right eye are located at the position of the pupil of the right eye defined by the window.

Optionally, the lens module is configured to project the display module within a range less than or equal to 10m from the viewing window.

Optionally, each display screen is configured such that the length extending direction of each light-transmitting strip of the grating panel is consistent with the left-right direction of the head-mounted display device.

Optionally, the lens module includes a left-eye lens assembly corresponding to the left eye and a right-eye lens assembly corresponding to the right eye, and each lens assembly includes an independent lens barrel and a lens installed in the lens barrel.

Optionally, the lens includes a convex lens and a concave lens, and the convex lens is disposed close to the window relative to the concave lens.

A beneficial effect of the utility model is that, since the display screen of the utility model forms two viewpoints through the spectroscopic action of the grating panel, and the distance between the two viewpoints is less than or equal to the pupil diameter of the human eye, the grating panel can The display area of the display panel is divided into a first display area corresponding to a first viewpoint of one eye of the viewer, and a second display area corresponding to a second viewpoint of the same eye. In this way, if the display screen is set to simultaneously display homologous image points of the same object through the first display area and the second display area, the focal point of the eye for the object will fall on the intersection of the output rays of the same source image points, Instead of falling on the display screen that is drawn deep by the lens module like the existing technology. On this basis, according to the head-mounted display device of the present invention, by setting two such display screens to respectively display the parallax image for the left eye and the parallax image for the right eye, the effect that the depth of focus for the same object is equal to the depth of the parallax angle can be obtained, Furthermore, the viewer can obtain accurate focal length cognition through the head-mounted display device, enhance the immersion of the viewer, and reduce visual fatigue and 3D vertigo.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principle of the invention.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principle of the invention.

Figure 1a is a schematic diagram of the formation of multiple images on the retinas of the left eye and the right eye by light rays reflected by an object;

Figure 1b is a schematic diagram of combining the multiple images formed in Figure 1a by the left eye and the right eye to form a clear image;

Fig. 2 is the visual effect schematic diagram of existing virtual reality equipment;

3 is a schematic structural diagram of a display screen according to an embodiment of the present invention;

4 is a schematic structural view of a display screen according to another embodiment of the present invention;

5 is a schematic structural diagram of a head-mounted display device according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of the visual effect of realizing accurate focal length cognition based on the head-mounted display device shown in FIG. 5;

7 is a schematic flowchart of a display control method according to an embodiment of the present invention;

Fig. 8 is a functional block diagram of a display control device according to an embodiment of the present invention;

9 is a functional block diagram of a hardware structure of a display control device according to an embodiment of the present invention;

Fig. 10 is a functional block diagram of a virtual reality device according to an embodiment of the present invention;

Fig. 11a is a schematic diagram of displaying the first left-eye parallax image or right-eye parallax image through the display screen in Fig. 3;

FIG. 11b is a schematic diagram of displaying a second left-eye parallax image or a right-eye parallax image through the display screen in FIG. 3 .

Detailed ways

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature, and in no way serves as any limitation of the invention and its application or use.

Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the description.

In all examples shown and discussed herein, any specific values should be construed as exemplary only, and not as limitations. Therefore, other instances of the exemplary embodiment may have different values.

It should be noted that like numerals and letters denote like items in the following figures, therefore, once an item is defined in one figure, it does not require further discussion in subsequent figures.

<display>

Fig. 3 is a schematic structural diagram of a display screen for obtaining focus distance recognition according to an embodiment of the present invention.

According to FIG. 3 , the display screen 300 of this embodiment of the present invention includes a display panel 310 and a grating panel 320 .

The display panel 310 is used to present images.

The light output from the display panel 310 enters the pupil of the viewer through the light-emitting surface of the display panel 310 , and then enters the viewer's eyes for imaging.

The grating panel 320 includes light-transmitting strips 321 arranged at intervals. This shows that the grating panel 320 includes a light-transmitting strip 321 and a light-shielding strip 322 , and the light-transmitting strip 321 and the light-shielding strip 322 are arranged at intervals.

The grating panel 320 may form a part of the light-transmitting belt 321 through a light-transmitting material, or form a part of the light-transmitting belt 321 through a light-transmitting gap, and form a part of the above light-shielding belt 322 through an opaque material.

The grating panel 320 is configured to split and project the light output by the display panel 310 to two viewpoints, namely the first viewpoint E1 and the second viewpoint E2, and the distance between the two viewpoints E1 and E2 is smaller than or equal to that of the human eye. The diameter of the pupil is such that the light rays reaching the two viewpoints E1 and E2 can enter the same eye of the viewer for imaging.

In this embodiment, the grating panel 320 is located behind the display panel 310 .

In this embodiment, the function of the grating panel 320 is as follows: through the light-transmitting strip 321 on the grating panel 320, the light output by the backlight panel 330 is split and projected onto the display panel 310, thereby dividing the display area of the display panel 310 It is the first display area corresponding to the first viewpoint E1 of one eye E of the viewer, and the second display area corresponding to the second viewpoint E2 of the eye E, so that the light output through the first display area can reach the first The viewpoint E1 cannot reach the second viewpoint E2, and the light output through the second display area can reach the second viewpoint E2 but cannot reach the first viewpoint E1. Therefore, those skilled in the art know that the display screen 300 also includes a backlight panel 330, and the grating panel 320 is arranged between the display panel 310 and the backlight panel 330. The display panel 310 is a panel structure without an active light source, such as a liquid crystal panel. .

In another embodiment of the present invention, the grating panel 320 may also be located in front of the display panel 310 , that is, located at one side of the light-emitting surface of the display panel 310 .

In this other embodiment, the function of the grating panel 320 is: splitting and projecting the light output by the display panel 310 to the first viewpoint E1 and the second viewpoint E2, and then dividing the display area of the display panel 310 into corresponding viewing The first display area of the first viewpoint E1 of one eye E, and the second display area corresponding to the second viewpoint E2 of the eye E, so that the light output through the first display area can reach the first viewpoint E1, However, it cannot reach the second viewpoint E2, and the light output through the second display area can reach the second viewpoint E2, but cannot reach the first viewpoint E1.

In another embodiment, the display panel 310 may be a panel structure without an active light source, such as a liquid crystal panel, where a backlight panel also needs to be configured.

In another embodiment, the display panel 310 may also be a panel structure with an active light source, such as an LED panel.

Regardless of whether the grating panel 320 is arranged in front of or behind the display panel 310, as shown in FIG. A light-transmitting strip divides the corresponding pixel area into two parts, respectively the first pixel area 310a corresponding to the first viewpoint E1 and the second pixel area 310b corresponding to the second viewpoint E2. Furthermore, the grating panel 320 can divide the display area of the display panel 310 into a first pixel area 310a and a second pixel area 310b arranged at intervals in the arrangement direction of the light-transmitting strips, so that the light output by the first pixel area 310a will project The light that reaches the first viewpoint E1 and causes the output of the second pixel region 310b will be projected to the second viewpoint E2.

The set of all the first pixel regions 310a obtained by splitting light through the grating panel 320 constitutes the above-mentioned first display region, and the set of all the second pixel regions 310b obtained by splitting light through the grating panel 320 constitutes the above-mentioned second display region.

According to the display screen 300 of the present invention, the grating panel 320 can divide the display area of the display panel 310 into a first display area corresponding to the first viewpoint E1 of one eye of the viewer, and a second display area corresponding to the second viewpoint E2 of the eye. Second display area. In this way, by setting the display panel 310 to present homologous image points representing the same object F in the first display area and the second display area, the light output from the homologous image points will converge at the position between the display panel 310 and the viewer. Then projected to the first viewpoint E1 and the second viewpoint E2 of the eye, and then as shown in Figure 1a, multiple images of the object F will be formed on the retina of the eye, and will be shown in Figure 1b, in the Under the action of the brain controlling the contraction of the eye muscles to deform the lens, multiple images are combined to form a clear image of the object F. At the same time, the degree of contraction of the eye muscles will give the brain a feedback on the depth of focus of the object F , the focal depth is equal to the vertical distance from the intersection point of the light output from the homologous image point of the object F to the eye.

Further, in the case where the head-mounted display device is provided with two display screens 300 according to this embodiment of the present invention, one display screen is used as a left-eye display screen corresponding to the left eye, and the other display screen is used as a display screen corresponding to the right eye. For the right-eye display screen, by setting the pixel coordinate relationship of the left-eye display screen with respect to the homologous image points of the object F, and the pixel coordinate relationship of the right-eye display screen with respect to the homologous image points of the object F, the following conditions are satisfied: The vertical distance from the intersection point to the eyes is equal to the vertical distance from the eyes of the stereoscopic image of the object F seen by the viewer through the left and right parallax images, so that the viewer's perception of the parallax angle depth for the object F is the same as for the object F In this way, the viewer can obtain accurate focus distance cognition through the head-mounted display device, and enhance the immersion of the viewer.

In one embodiment of the present invention, the grating panel 320 is a liquid crystal panel, and the grating panel 320 is configured to form light-transmitting strips 321 arranged at intervals by controlling the state of liquid crystal molecules of the liquid crystal panel.

Since the liquid crystal panel includes pixels arranged in a matrix structure, each pixel has liquid crystal molecules, and when the liquid crystal molecules are not deflected, the corresponding pixel appears white that can transmit light, and when the liquid crystal molecules are deflected by an electric field, the corresponding The pixels appear opaque black. In this way, a light-transmitting strip 321 extending in the column direction can be obtained by controlling the non-deflection of liquid crystal molecules in at least one column of pixels, and a light-shielding strip 321 extending in the column direction can be obtained by controlling the deflection of liquid crystal molecules in at least one column of pixels. Take 322. Similarly, a light-transmitting band 321 extending in the row direction can be obtained by controlling the non-deflection of liquid crystal molecules in at least one row of pixels, and a light-shielding band extending in the row direction can be obtained by controlling the deflection of liquid crystal molecules in at least one row of pixels 322.

According to this embodiment of the utility model, the width of the light-transmitting belt 321 and the light-shielding belt 322 can be adjusted at any time according to the design requirements, and the positions of the light-transmitting belt 321 and the light-shielding belt 322 can also be changed arbitrarily according to the design needs, which improves the design of the grating panel 320 flexibility.

In one embodiment of the present invention, the width of each light-transmitting zone 321 of the grating panel 320 is such that the light output by the pixel points in two adjacent rows or in two adjacent columns of the display panel 321 is respectively projected to different viewpoints. .

In this embodiment, the pixel area corresponding to each light-transmitting zone 321 includes two adjacent columns of pixel points or two adjacent rows of pixel points. Taking two adjacent columns of pixel points as an example, through the light splitting effect of the grating panel 320, In each pixel area, light output from one column of pixels is projected to the first viewpoint E1, and light output from another column of pixel points is projected to the second viewpoint E2.

According to this embodiment of the utility model, the distance between the display panel 310 and the grating panel 320 can be compressed under the condition that the distance between the two viewpoints E1 and E2 is constant, so that the display screen 300 has a smaller thickness, so as to It is beneficial to be used in a head-mounted display device.

Fig. 4 is a schematic structural diagram of a display screen according to another embodiment of the present invention.

As shown in FIG. 4 , the display screen in this embodiment of the present invention has a diffuser plate 340 added to the display screen shown in FIG. 3 .

In this embodiment, the grating panel 320 is required to be located behind the display panel 310 , and the diffusion plate 340 is located between the display panel 310 and the grating panel 320 .

The diffusion direction of the diffusion plate 340 is consistent with the arrangement direction of the red, green and blue (RGB) sub-pixels of each pixel in the display panel 310 , and the length extension direction of the light-transmissive strips of the grating panel 320 is also consistent with the diffusion direction.

For example, if RGB sub-pixels of a pixel point are arranged in a horizontal direction, the diffusion direction of the diffusion plate 340 and the length extension method of the light-transmissive strip are also horizontal.

For another example, if the RGB sub-pixels of a pixel point are arranged vertically, the diffusion direction of the diffusion plate 340 and the length extension method of the light-transmitting strip are also vertical.

Here, since the display panel 310 and the grating panel 320 are stacked together, moiré fringe interference will be generated under the periodic structure of the grating panel 320 that needs to switch the position of the light-transmitting belt 321 , which in turn will affect the picture presented by the display panel 310 quality. However, according to this embodiment of the present invention, the periodic structure of the grating panel 320 can be resolved by increasing the diffuser plate 340 to diffuse in the arrangement direction of the sub-pixels, thereby eliminating the moiré fringe interference phenomenon. The extending direction of the length of the light strip is parallel to the diffusion direction, which can ensure that the diffusion effect and the light splitting effect of the grating panel 320 will not interfere with each other.

Further, the display panel 310 and the grating panel 320 may both be liquid crystal panels.

<head-mounted display device>

Fig. 5 is a schematic structural diagram of a head-mounted display device according to an embodiment of the present invention.

As shown in FIG. 5 , the head-mounted display device 500 of the embodiment of the present invention includes a display module 510 , a lens module 520 and a window 530 .

The lens module 520 is located between the display module 510 and the window 530 in the front-back direction P1 of the head-mounted display device 500, so that the light output by the display module 510 reaches the window 530 through the lens module 520, and then enters the viewer. s eyes.

The display module 510 includes two display screens 300 according to any embodiment of the present invention, which are respectively used as a left-eye display screen 300a corresponding to the left eye and a right-eye display screen 300b corresponding to the right eye, which means that the left-eye display screen 300a and the right-eye display screen 300b are arranged side by side in the left-right direction P2.

The above front and rear directions P1 and left and right directions P2 are defined according to the orientation of the head-mounted display device 500 when it is in use, wherein the direction pointing to the front of the viewer is the front, the direction pointing to the back of the viewer is the rear, and the direction pointing to the left of the viewer The direction of is left, and the direction pointing to the viewer's right is right.

The two viewpoints formed by the left-eye display screen 300 a are located at the position of the left eye pupil defined by the window 530 , and the two viewpoints formed by the right-eye display screen 300 b are located at the position of the right eye pupil defined by the window 530 .

Since the viewer wears the head-mounted display device 500 , the gap between the viewer's eyes and the window 530 is small, therefore, the positions of the left eye pupil and the right eye pupil defined by the above window 530 can be considered to be on the window 530 .

The position of the pupil of the left eye and the position of the pupil of the right eye defined by the above window 530 can also be located behind the window 530, so that when the viewer wears the head-mounted display device 500, the position of the pupil of the left eye and the position of the pupil of the right eye can be basically located at the position of the viewer. corresponding to the pupil. In this example, the two viewpoints formed by the display screens 300a and 300b can be determined as positions according to the gap between the viewer's eyes defined by the window 530 and the window 530 .

According to this embodiment of the present invention, as shown in FIG. 6, the head-mounted display device 500 can present the left-eye parallax image through the left-eye display screen 300a and the right-eye display screen 300b according to the design of obtaining the stereoscopic display effect through the parallax angle. The parallax image for the right eye is presented, so that for the object F on the parallax image for the left eye and the parallax image for the right eye, the viewer can see the stereoscopic image F' of the object F under the induction of the left and right parallax images, and the stereoscopic image F ′ is closer to the viewer than the display module 510 ′ drawn deep by the lens module 520 . At the same time, by setting the pixel coordinate relationship of a pair of homologous image points FL1 and FL2 of the object F on the left-eye display screen 300a and another pair of homologous image points FR1 and FR2 of the object F on the right-eye display screen 300b satisfy : The vertical distance from the intersection point of the rays output by each pair of homologous image points to the eye is equal to the vertical distance from the stereoscopic image F′ to the eye, that is, the parallax angle depth Fd for the object F can be consistent with the focal depth FD for the object F, In this way, an accurate focus distance cognition can be obtained through the head-mounted display device 500, and the immersion of the viewer can be enhanced.

In addition, for existing head-mounted display devices, since the viewer's focus on the object presented in the image is located on the display module that is drawn deep by the lens module, when the viewer looks at the object F, other objects within the visual range Objects will also be clear, which is inconsistent with human visual habits and will reduce the immersion of the head-mounted display device. However, according to the head-mounted display device 500 of this embodiment of the present invention, since the viewer can obtain accurate focus distance cognition, when the viewer looks at the stereoscopic image F' of the object F, the focal point of the eyes will fall on the object The position of the stereoscopic image F' of F, while the stereoscopic images at other positions will become blurred because the corresponding focus depth is different from that of the object F, which will be more in line with people's perception habits and enhance the immersion of the viewer.

Furthermore, as shown in FIG. 2 , since the viewer cannot obtain accurate focal length cognition through the existing head-mounted display device, in order to alleviate the discomfort caused by this phenomenon, the existing head-mounted display device is basically set so that the lens The module can put the display module at a position more than 10m away from the window, even up to 50m, to avoid the close-range area where the eyes are sensitive to the focus perception, which also prevents the viewer from getting close-up information through the existing head-mounted display device. The main reason for the virtual reality experience at your fingertips. For the head-mounted display device 500 of the embodiment of the present utility model, since the viewer can obtain accurate focal length cognition, even if the lens module 520 is set to place the display module 510 at a position closer to the window 530 (eyes are relatively close to The area where the focal length perception is more sensitive), the viewer will not have any discomfort and dizziness.

Based on the above reasons, in one embodiment of the present invention, the lens module 520 can be set to place the display module 510 within a range less than or equal to 10m from the window 530, for example, to place the display module 510 at a distance of 5m from the window 530 .

According to this embodiment of the utility model, the viewer will be able to obtain a virtual reality experience close at hand through the head-mounted display device.

According to an embodiment of the present invention, the head-mounted display device 500 may include an outer cover, the display module 510 and the lens module 520 are installed in the outer cover, and the window 530 is exposed outside through the outer cover.

In one embodiment of the present invention, the lens module 520 includes a left-eye lens assembly corresponding to the left eye and a right-eye lens assembly corresponding to the right eye, and each lens assembly includes an independent lens barrel and a lens installed in the lens barrel.

In this embodiment of the present invention, each lens assembly adopts a separate lens barrel, which can realize light blocking between the two display screens 300a, 300b.

Each lens assembly can adopt the most basic optical structure, that is, only one convex lens is provided.

Each lens assembly can also adopt a combined structure of a convex lens and a concave lens to solve problems such as color reproduction distortion, wherein the convex lens can be disposed close to the window 530 relative to the concave lens.

In an embodiment of the present invention, the window 530 may include a left-eye window corresponding to the left eye and a right-eye window corresponding to the right eye, both of which are independently arranged on the cover of the head-mounted display device 500 .

In one embodiment of the present invention, each display screen 300a, 300b can be set so that the length extension direction of each light-transmitting strip in the grating panel 320 is consistent with the left-right direction P2 of the head-mounted display device, so that each The two viewpoints of the display screens 300a, 300b are aligned in the height direction.

The height direction of the head-mounted display device is perpendicular to the front-back direction P1 and the left-right direction P2 shown in FIG. 5 .

According to this embodiment of the present invention, the diffusion direction of the diffusion plate 340, the arrangement direction of the red, green and blue sub-pixels of the pixel points of the display panel 310, and the length extension of the light transmission zone of the grating panel 330 can be set when the diffusion plate 340 is set. The directions are both the left and right direction P2 to conform to the normal usage habits of the display panel 310 , that is, the width of the display panel 310 is greater than the height of the display panel 310 .

In another embodiment of the present utility model, each display screen 300a, 300b can also be configured such that the length extension direction of each light-transmitting strip in the grating panel 320 is consistent with the left-right direction of the head-mounted display device. In this way, the two viewpoints of each display screen 300a, 300b will be aligned in the height direction.

<Display control method>

FIG. 7 is a schematic flowchart of a display control method of any one of the above head-mounted display devices according to an embodiment of the present invention.

According to Fig. 5 and Fig. 7, the display control method of the embodiment of the present invention includes the following steps:

Step S710, acquiring the left eye's first viewpoint collected by the camera corresponding to the first viewpoint of the left eye, the camera corresponding to the second viewpoint of the left eye, the camera corresponding to the first viewpoint of the right eye, and the camera corresponding to the second viewpoint of the right eye respectively at the same time. An image, a second image for the left eye, a first image for the right eye, and a second image for the right eye.

The camera corresponding to the first viewpoint of the left eye and the camera corresponding to the second viewpoint of the left eye are set according to the positions and parallax angles of the two viewpoints formed by the left-eye display screen 300a.

The camera corresponding to the first viewpoint of the right eye and the camera corresponding to the second viewpoint of the right eye are set according to the positions and parallax angles of the two viewpoints formed by the right-eye display screen 300b.

The four cameras operate synchronously to shoot scene images, and the first image for the left eye (from the camera corresponding to the first viewpoint of the left eye) and the second image for the left eye (from the camera corresponding to the second viewpoint of the left eye) collected at the same time can be obtained , the first image for the right eye (from the camera corresponding to the first viewpoint of the right eye), and the second image for the right eye (from the camera corresponding to the second viewpoint of the right eye).

In this way, referring to FIG. 6 , the vertical distance between the object F and each camera in the scene is the parallax angle depth Fd of the corresponding object F. The vertical distance h between the display modules 510' drawn by the lens module 520, and the distance eg between the two viewpoints of the left eye and the two viewpoints of the right eye can be obtained corresponding to the two viewpoints of the left eye and the distance between the two viewpoints of the right eye. The pixel coordinate difference ΔP between the focused homologous image points of two viewpoints:

Further, technicians can design the lens module 520 of the head-mounted display device, the light-transmitting band width of the grating panel 320 , and the distance between the grating panel 320 and the display panel 310 according to formula (1) and the pixel size of the display panel 310 , and the distance eg between the two viewpoints E1 and E2, so as to achieve the purpose of splitting and projecting the light output by the display panel 310 to the two viewpoints. The parameter matching design of the above parts is well known in the art, so it will not be described in detail here.

Step S721, extract each left image area located in odd columns from the left eye first image, and extract each left image area located in even columns from the left eye second image, wherein each left image area located in odd columns The areas and the left two image areas located in the even columns are in one-to-one correspondence with the light-transmitting strips 321 of the grating panel 320 of the left-eye display screen 300a.

Each left first image area and each left second image area have the same width, and the number of pixel columns or pixel rows corresponding to the width has been determined by the above matching design structure.

Step S722, extract the first right image areas located in odd columns from the first image for the right eye, and extract the second right image areas located in even columns from the second image for the right eye, wherein each right image area located in odd columns The areas and the two right image areas located in the even columns are in one-to-one correspondence with the light-transmitting zones of the grating panel of the right-eye display screen.

Each right first image area and each right second image area have the same width, and the number of pixel columns or pixel rows corresponding to this width has been determined by the structure of the above matching design.

Step S731, arranging the left-first image areas in odd-numbered columns and the left-second image areas in even-numbered columns at intervals to synthesize a first left-eye parallax image, so that the light emitted by each left-first image area in odd-numbered columns passes through the corresponding lens The light bands are incident to the first viewpoint of the left eye, and the light rays emitted by the second left image areas located in the even columns are incident to the second viewpoint of the left eye through the corresponding light transmission bands.

According to this step S731, the left-eye display screen 300a displays the first pixel area 310a divided by each light-transmitting zone 321 corresponding to the left image area of the same light-transmitting zone 321, and the first pixel area 310a divided by each light-transmitting zone 321 The second pixel area 310 b displays the second left image area corresponding to the same light-transmitting strip 321 .

Step S732, arranging the first right image areas in odd columns and the second right image areas in even columns at intervals to synthesize the first right-eye parallax image, so that the light emitted by the first right image areas in odd columns passes through the corresponding lens The light bands are incident to the first viewpoint of the right eye, and the light rays emitted by the two right image areas located in the even columns are incident to the second viewpoint of the right eye through the corresponding light transmission bands.

According to this step S732, the right-eye display screen 300b displays the first pixel area 310a divided by each light-transmitting zone 321 corresponding to the right image area of the same light-transmitting zone 321, and the first pixel area 310a divided by each light-transmitting zone 321 The second pixel area displays the second right image area corresponding to the same light-transmitting strip 321 .

Step S740, controlling the left-eye display to display the first left-eye parallax image, and the right-eye display to display the first right-eye parallax image.

The left-eye disparity image and the right-eye disparity image provide binocular disparity information for both eyes of the viewer. The image points formed by the same object in the left and right parallax images in the space scene are called homologous image points, which are defined here as the parallax homologous image points used to form parallax, and the parallax homologous image points in the left eye parallax The difference in pixel coordinates in the image and the right-eye disparity image is the disparity.

Parallax includes vertical parallax and horizontal parallax. Because horizontal parallax is the main factor to achieve stereoscopic display, and vertical parallax will cause visual fatigue to the viewer, therefore, the left-eye parallax image and right-eye parallax image can be image pairs with only horizontal parallax .

According to the division of the above step S721, in the left-eye parallax image, the pixel coordinate difference between the homologous image points representing the same object in the first left image area and the second left image area will satisfy: The focal depths of the two viewpoints E1 and E2 are equal to the parallax angle depth of the stereoscopic image presented by the object.

According to the division of the above step S722, in the parallax image for the right eye, the pixel coordinate difference between the homologous image point representing the object in the first right image area and the second right image area will satisfy: The depth of focus of the viewpoints E1 and E2 is also equal to the depth of the parallax angle of the stereoscopic image formed by the object.

Here, the homologous image points representing the same object in the first left image area and the second left image area, and the homologous image points representing the object in the first right image area and the second right image area are defined as being used to make the viewer Gain focus on homologous image points for focal length awareness.

According to the control display of step S740, as shown in FIG. 6, when the viewer looks at the stereoscopic image F' of the object F through the head-mounted display device 500, the left eye EL passes through the corresponding two viewpoints E1 and E2 to form the object F. The depth of focus and the depth of focus of the object F formed by the right eye ER through the corresponding two viewpoints E1 and E2 will be equal to the parallax angle depth Fd of the stereoscopic image F′ presented by the object F, so as to obtain accurate focus distance cognition. Here, since the focus depth FD of both eyes on the object F is consistent with the parallax angle depth Fd of the stereoscopic image F′ viewed, and the feedback of these visual information corresponds to the same object, the viewer will These visual information are aggregated together to obtain a visual effect similar to that shown in FIG. 6 , that is, the viewer's visual perception of the object F will be that the focal points of the eyes for the object F overlap with the stereoscopic image.

Further, the utility model method may also include the following steps:

Step S810, after controlling the left-eye display to display the first left-eye parallax image and the right-eye display to display the first right-eye parallax image in the above step S740, replace the light-transmitting zone and the light-shielding band of the grating panel of the left-eye display The position of the band, and the position of the light-transmitting band and the light-shielding band of the grating panel of the right-eye display.

Referring to Fig. 11a and Fig. 11b, by replacing the position of the light-transmitting strip and the light-shielding strip of the grating panel of the left-eye display screen 300a, it is still possible to change the order of the first left image area and the second left image area. The light emitted by each left image area in even columns is projected to the first left eye point of view, and the light emitted by each left two image areas in odd columns is projected to the left eye's second point of view.

Referring to Fig. 11a and Fig. 11b, by replacing the positions of the light-transmitting strip and the light-shielding strip of the grating panel of the right-eye display screen 300b, it is still possible to change the sequence of the first right image area and the second right image area. The light beams emitted by the first right image areas in the even columns are projected to the first right eye point of view, and the light beams emitted by the second right image areas in the odd columns are projected to the second right eye point of view.

Step S821, extracting each left first image area located in even columns from the left eye first image, and extracting each left second image areas located in odd columns from the left eye second image, wherein each left image area located in even columns The areas and the left two image areas located in odd columns are in one-to-one correspondence with the replaced light-transmitting zones of the grating panel 320 of the left-eye display screen 300a.

This step S821 can be executed synchronously with the above step S721, or executed sequentially.

Step S822, extracting the first right image areas located in the even columns from the first image for the right eye, and extracting the second image areas located in the odd columns from the second image for the right eye, wherein each right image area located in the even columns The areas and the two right image areas located in the odd columns are in one-to-one correspondence with the replaced light-transmitting zones of the grating panel 320 of the right-eye display screen 300b.

This step S822 can be executed synchronously with the above step S722, or executed sequentially.

Step S831, arranging the first left image areas in the even columns and the second left image areas in the odd columns at intervals to synthesize a second left-eye parallax image, so that the light rays emitted by the first left image areas in the even columns are replaced by The corresponding translucent zone is incident to the first viewpoint of the left eye, and the light rays emitted by the second left image areas located in odd columns are incident to the second viewpoint of the left eye through the corresponding transmissive zone after replacement.

This step S831 can be executed synchronously with the above step S731, or executed sequentially.

According to the step S831 and the above step S731, it can be seen that the first left-eye parallax image and the second left-eye parallax image are complementary images, and in the complementary image, the order of the first left image area and the second left image area is swapped.

For the first left-eye parallax image, see Fig. 11a, the first left-eye parallax image includes the first left image area A1, A3...A13 on the odd-numbered columns, and the second left-eye image area B2, B4... on the even-numbered columns. B14, for the first left-eye parallax image, the first pixel area 310a is located in an odd column, and the corresponding left image area A1, A3....A13 is displayed through the first pixel area 310a arranged at intervals, and the second pixel area 310b is located in Even columns, and display the corresponding left two image areas B2, B4 . . . B14 through the second pixel areas 310b arranged at intervals.

For the second left-eye parallax image, see Fig. 11b, the second left-eye parallax image includes the first left image area A2, A4...A14 on the even-numbered columns, and the second left-eye image area B1, B3... on the odd-numbered columns. B13, then for the second frame of left-eye parallax image, the first pixel area 310a is located in an even column, and the corresponding left image area A2, A4....A14 is displayed through the first pixel area 310a arranged at intervals, and the second pixel area 310b The second pixel regions 310 b located in odd columns and arranged at intervals display the corresponding left two image regions B1 , B3 . . . B13 .

Step S832, arranging the first right image areas in the even columns and the second right image areas in the odd columns at intervals to synthesize a second right-eye parallax image, so that the light rays emitted by the first image areas in the even columns are replaced by The corresponding translucent zone is incident to the first viewpoint of the right eye, and the light emitted by each of the two right image areas located in odd columns is incident to the second viewpoint of the right eye through the corresponding transmissive zone after replacement.

This step S832 can be executed synchronously with the above step S732, or executed sequentially.

For the relationship between the first right-eye parallax image and the second right-eye parallax image, refer to the above description of the first left-eye parallax image and the second left-eye parallax image.

Step S840, after step S810, control the left-eye display screen 300a to display the second left-eye parallax image, and the right-eye display screen 300b to display the second right-eye parallax image.

Since the first left-eye parallax image and the second left-eye parallax image, and the first right-eye parallax image and the second right-eye parallax image are displayed on the left-eye display screen 300a and the right-eye display screen 300b respectively as two consecutive frames of images, When the display time interval between the two is less than or equal to the visual persistence time of human eyes, for the viewer, it will be considered that two consecutive frames of left-eye parallax images and two consecutive frames of right-eye parallax images are displayed at the same time .

According to this embodiment of the present utility model, when two consecutive frames of left-eye parallax images are displayed in time-division through the left-eye display screen 300a, the complete left-eye first image can be displayed through the entire display area of the left-eye display screen 300a, and can be displayed through the left-eye display screen 300a. The entire display area of the left-eye display screen 300a displays the visual effect of the complete left-eye second image corresponding to the second left-eye image area of the second viewpoint E2; similarly, two consecutive frames of right-eye parallax are displayed in time-sharing through the right-eye display screen 300b When displaying images, the visual effects of displaying a complete first image for the right eye through the entire display area of the right-eye display 300b and displaying a complete second image for the right eye through the entire display area of the right-eye display 300b can be obtained. Therefore, through this embodiment of the present invention, the display resolution of the display screens 300a, 300b can be improved.

<display control device>

Fig. 8 is a functional block diagram of a display control device of any one of the above head-mounted display devices according to an embodiment of the present invention.

As shown in Figure 8, the display control device in this embodiment of the present invention includes an image acquisition module 8100, a left-eye image extraction module 8210, a right-eye image extraction module 8220, a left-eye image synthesis module 8310, a right-eye image synthesis module 8320, And display control module 8400.

The image acquisition module 8100 is used to obtain the camera corresponding to the first viewpoint of the left eye, the camera corresponding to the second viewpoint of the left eye, the camera corresponding to the first viewpoint of the right eye, and the camera corresponding to the second viewpoint of the right eye respectively collected at the same time The first image for the left eye, the second image for the left eye, the first image for the right eye, and the second image for the right eye.

The left-eye image extraction module 8210 is used to extract each left-first image area located in odd-numbered columns from the left-eye first image, and extract each left-second image area located in even-numbered columns from the left-eye second image, wherein the left-eye image areas located in odd-numbered columns Each left first image area in a column and each left second image area in an even column are in one-to-one correspondence with the light-transmitting strips 321 of the grating panel 320 of the left-eye display screen 300a.

The left-eye image synthesis module 8310 is used to arrange and synthesize the first left-eye parallax image between each left-first image area in odd-numbered columns and each left-second image area in even-numbered columns, so that each left-first image area in odd-numbered columns The emitted light enters the first left-eye viewpoint through the corresponding light-transmitting strip 321 , and the light emitted from each left two image areas located in the even columns enters the left-eye second viewpoint through the corresponding light-transmitting strip 321 .

The right-eye image extraction module 8220 is used to extract the first right image areas located in odd-numbered columns from the first right-eye image, and extract the second right image areas located in even-numbered columns from the second right-eye image. Each right first image area in a column and each right second image area in an even column are in one-to-one correspondence with the light-transmitting strips 321 of the grating panel 320 of the right-eye display screen 300b.

The right-eye image synthesis module 8320 is used to synthesize the first right-eye parallax image by arranging the first right image areas in odd columns and the second right image areas in even columns at intervals, so that the first right image areas in odd columns The emitted light is incident to the first right eye point of view through the corresponding light-transmitting strip 321 , and the light emitted from each right two image areas located in the even columns is incident to the right-eye second point of view through the corresponding light-transmitting strip 321 .

The display control module 8400 is used to control the left-eye display screen 300a to display the first left-eye parallax image, and the right-eye display screen 300b to display the first right-eye parallax image.

In another embodiment of the utility model, the device of the utility model may further include a grating control module (not shown in the figure). The grating control module is used to replace the grating panel 320 of the left-eye display 300a after the display control module 8400 controls the left-eye display 300a to display the first left-eye parallax image and the right-eye display 300b to display the first right-eye parallax image The positions of the light-transmitting strip 321 and the light-shielding strip 322 of the right-eye display screen 300b, and the positions of the light-transmitting strip 321 and the light-shielding strip 322 of the grating panel 320 of the right-eye display screen 300b are replaced.

Further, the above-mentioned left-eye image extraction module 8210 can also be used to extract each left-first image area located in an even-numbered column from the left-eye first image, and extract each left-second image area located in an odd-numbered column from the left-eye second image , wherein, each left first image area located in even columns and each left second image area located in odd columns are in one-to-one correspondence with the replaced light-transmitting zones of the grating panel 320 of the left-eye display screen 300a.

Correspondingly, the above-mentioned left-eye image synthesis module 8310 is further configured to alternately arrange each left-first image area located in an even-numbered column and each left-second image area located in an odd-numbered column to synthesize a second left-eye parallax image, so that each left-eye image area located in an even-numbered column The light emitted by the left image area is incident to the first viewpoint of the left eye through the corresponding translucent zone after replacement, and the light emitted by each left second image area located in the odd column is incident to the first left eye through the corresponding translucent zone after replacement. Two viewpoints.

Further, the right-eye image extraction module 8220 is also used to extract the first right image areas located in even-numbered columns from the first right-eye image, and extract the second right image areas located in odd-numbered columns from the second right-eye image, wherein Each of the first right image areas located in the even columns and each of the second image areas located in the odd columns are in one-to-one correspondence with the replaced light-transmitting zones of the grating panel of the right-eye display screen.

Correspondingly, the right-eye image synthesis module 8320 is also configured to arrange the first right image areas in even columns and the second right image areas in odd columns to synthesize a second right-eye parallax image, so that each right image area in even columns The light emitted by an image area enters the first viewpoint of the right eye through the corresponding translucent zone after replacement, and makes the light emitted by each of the second image regions located in odd columns incident on the first right eye through the corresponding translucent zone after replacement. Two viewpoints.

Further, the display control module 8400 is further configured to control the left-eye display screen to display the second left-eye parallax image and the The right-eye display screen displays the second right-eye parallax image.

<hardware structure>

FIG. 9 is a block diagram of a hardware structure of a display control device of any one of the above head-mounted display devices according to an embodiment of the present invention.

According to FIG. 9 , the display control device may include at least one processor 910 and at least one memory 920 .

The memory 920 is used to store instructions, and the instructions are used to control the processor 910 to operate to execute the display control method according to the present invention.

The memory 920 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory.

The display control device may also include a communication device 930 to transmit data and instructions through the communication device 930. The communication device 930 may be a wired communication device, such as a USB communication device, or a wireless communication device, such as a Bluetooth communication device. , WIFI communication device, etc.

<Virtual reality device>

Fig. 10 is a functional block diagram of a virtual reality device according to an embodiment of the present invention.

As shown in FIG. 10 , the virtual reality device in this embodiment of the present invention includes a head-mounted display device 500 according to the embodiment of the present invention and a display control device according to the embodiment of the present invention, which is marked as 1010 here.

The display control device 1010 is configured to control the left-eye display screen 300a and the right-eye display screen 300b of the head-mounted display device 500 to display images according to the display control method of the embodiment of the present invention, so that the viewer can obtain an accurate focal length cognition.

The above display control device can be integrated on the head-mounted display device 500, or can be set separately from the head-mounted display device 500, for example, set in a host computer connected to the head-mounted display device.

Various embodiments of the present invention have been described above, the above description is illustrative, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and alterations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principle of each embodiment, practical application or technical improvement in the market, or to enable other ordinary skilled in the art to understand each embodiment disclosed herein. The scope of the invention is defined by the appended claims.

Claims (10)

1. A display screen for obtaining focal length cognition, characterized in that it includes a display panel and a grating panel, the grating panel includes light-transmitting strips arranged at intervals, and the grating panel is located at the front or rear of the display panel The light-transmitting zone of the grating panel is set so that the light output by the display panel is split and projected to two viewpoints, and the distance between the two viewpoints is smaller than or equal to the pupil diameter of the human eye. 2 . The display screen according to claim 1 , wherein the grating panel is a liquid crystal panel, and the grating panel is configured to form the light-transmitting strips arranged at intervals by controlling the state of liquid crystal molecules of the liquid crystal panel. 3 . The display screen according to claim 1 , wherein the grating panel forms each of the light-transmitting bands through light-transmitting gaps. 4 . 4. The display screen according to claim 1, wherein the width of each light-transmitting zone of the grating panel is such that the light output by pixels in two adjacent rows or in two adjacent columns of the display panel is respectively projected to different viewpoints. 5. The display screen according to any one of claims 1 to 4, wherein the grating panel is located behind the display panel, the display screen further comprises a diffusion plate, and the diffusion plate is located at the rear of the display panel Between the grating panel; the diffusion direction of the diffusion plate, the arrangement direction of the red, green and blue sub-pixels of each pixel in the display panel, and the length extension direction of the light transmission band of the grating panel are consistent. 6. A head-mounted display device, characterized in that it includes a window, a lens module and a display module, the lens module is located between the window and the display module, and the display module includes two The display screen according to any one of claims 1 to 5, which are respectively used as a left-eye display screen and a right-eye display screen, the left-eye display screen and the right-eye display screen are on the left and right sides of the head-mounted display device The two viewpoints formed by the left-eye display screen are located at the position of the left eye pupil defined by the window, and the two viewpoints formed by the right-eye display screen are located at the position of the right eye pupil defined by the window. 7 . The head-mounted display device according to claim 6 , wherein the lens module is configured to place the display module within a range less than or equal to 10 m from the viewing window. 8. The head-mounted display device according to claim 6, wherein each display screen is configured such that the length extension direction of each light-transmitting strip of the grating panel is aligned with the left-right direction of the head-mounted display device unanimous. 9. The head-mounted display device according to claim 6, wherein the lens module includes a left-eye lens assembly corresponding to the left eye and a right-eye lens assembly corresponding to the right eye, and each lens assembly includes an independent mirror barrel and lens installed in the barrel. 10. The head-mounted display device according to claim 9, wherein the lens comprises a convex lens and a concave lens, and the convex lens is disposed close to the window relative to the concave lens.