CN115981027A - Horizontal parallax three-dimensional display device and method based on multilayer liquid crystal - Google Patents
Horizontal parallax three-dimensional display device and method based on multilayer liquid crystal Download PDFInfo
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- CN115981027A CN115981027A CN202211484031.XA CN202211484031A CN115981027A CN 115981027 A CN115981027 A CN 115981027A CN 202211484031 A CN202211484031 A CN 202211484031A CN 115981027 A CN115981027 A CN 115981027A
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Abstract
The invention discloses a horizontal parallax three-dimensional display device based on multilayer liquid crystal, which comprises a collimation backlight source, a horizontal orientation diffuser, a multilayer liquid crystal display panel and a vertical orientation diffuser, wherein the collimation backlight source, the horizontal orientation diffuser, the multilayer liquid crystal display panel and the vertical orientation diffuser are sequentially arranged along the direction of an optical path; the collimation backlight source is used for emitting collimation light; the horizontal directional diffuser is used for uniformly dispersing the incoming collimated light rays in a specific horizontal angle; the multilayer liquid crystal display panel is used for displaying the calculated projection image; the vertically oriented diffuser is used for uniformly diffusing the incoming light rays in a specific vertical angle. The invention also discloses a horizontal parallax three-dimensional display method based on the multilayer liquid crystal. The horizontal parallax three-dimensional display device and method based on the multilayer liquid crystal can solve the problem of resolution reduction in the process of three-dimensional display.
Description
Technical Field
The invention relates to the technical field of three-dimensional display, in particular to a horizontal parallax three-dimensional display device and method based on multilayer liquid crystal.
Background
Nowadays, three-dimensional display technologies such as 3D movies are increasingly closely related to the production and life of people. Compared with the traditional two-dimensional display, the three-dimensional display has the advantages that the depth information of the displayed object can be provided for an observer, and a real stereoscopic feeling is given to a user.
Among three-dimensional display techniques, there is a technique of rendering an image of a three-dimensional spatial object by reconstructing a four-dimensional light field of the object, which is called a spatial light field reconstruction technique. The display technology based on multilayer liquid crystal is one of the spatial light field reconstruction technologies. The three-dimensional scene image with binocular parallax can be reconstructed by arranging the multiple layers of liquid crystals in a stacking mode and then obtaining the transmittance distribution of all pixels of each layer of liquid crystal through iterative calculation. For example, chinese patent publication No. CN106842597A discloses a large depth of field near-to-eye light field three-dimensional display device capable of continuously and clearly focusing based on multilayer liquid crystal, which includes a backlight source, a multilayer liquid crystal screen, an optical switch, a multi-focal-length lens and a control terminal; the backlight source is used for providing uniform brightness backlight or directional backlight for the multilayer liquid crystal screen; the multilayer liquid crystal screen is used for modulating the intensity of backlight and generating a light field with shallow depth of field; the optical switch is used for controlling the optical fields optimized by different depths to enter human eyes; the multi-focal-length lens is formed by periodically arranging lens strips with different concentric focal lengths, the lens strips with the same focal length image a light field generated by the multilayer liquid crystal screen at a specific depth position, and thus a large-depth-of-field three-dimensional near-to-eye light field formed by combining a plurality of shallow-depth-of-field three-dimensional light fields is formed; the control terminal is used for controlling the transmittance of the RGB channel of each pixel on each layer of liquid crystal screen.
In order to present depth information that is lacking in conventional two-dimensional displays, a stereoscopic three-dimensional scene is presented to a user, and the three-dimensional display often needs to provide one more dimension of information. Therefore, when the multilayer liquid crystal-based three-dimensional display technology displays a stereoscopic image, the light field spatial depth information needs to be displayed on a fixed number of pixels, which causes the current multilayer liquid crystal display technology that the displayed stereoscopic image includes a certain degree of blur, i.e., the display resolution is seriously reduced.
Disclosure of Invention
The invention aims to provide a horizontal parallax three-dimensional display device and method based on multilayer liquid crystal, which can relieve the problem of reduced resolution in the process of three-dimensional display.
The specific technical scheme of the invention is as follows:
a horizontal parallax three-dimensional display device based on multilayer liquid crystal comprises a collimation backlight source, a horizontal orientation diffuser, a multilayer liquid crystal display panel and a vertical orientation diffuser which are sequentially arranged along the direction of an optical path;
collimated backlight source: emitting collimated light;
a horizontally oriented diffuser: uniformly dispersing the incoming collimated light rays at a specific horizontal angle;
multilayer liquid crystal display panel: modulating light in a horizontal direction;
vertically oriented diffusers: the incoming light is uniformly dispersed over a specific vertical angle.
When a user views a stereoscopic image, horizontal parallax contributes much more to the comfort of the stereoscopic image than vertical parallax. Based on the above, the device only contains the horizontal parallax with higher benefit by removing the vertical parallax information contained in the multilayer liquid crystal, so that the device can improve the presentation resolution of the stereoscopic image, reduce the calculation amount of the multilayer image, improve the calculation speed of the multilayer image and increase the dynamic display frame rate under the condition of providing the same depth information.
Preferably, the collimated backlight source and the horizontally oriented diffuser are closely attached to produce a backlight effect that diverges at a specific angle in the horizontal direction and is collimated in the vertical direction.
Wherein the collimated backlight and horizontally oriented diffuser section can be replaced with a custom backlight that diverges horizontally and is collimated vertically.
Preferably, the multi-layer liquid crystal display panel comprises more than two layers of liquid crystal display panels, the resolution size is the same, the interval is uniform, and the multi-layer liquid crystal display panel is closely attached to the horizontal orientation diffuser. The multilayer liquid crystal display panel modulates light rays scattered in the horizontal direction, and provides a stereoscopic effect image with horizontal parallax for a plurality of viewers in a set horizontal viewpoint range.
Preferably, the vertical directional diffuser is attached to the last layer of the liquid crystal display panel, and can vertically diffuse light, and vertically diffuse the modulated horizontal divergent light, so that a viewer can see a stereoscopic image with horizontal parallax within a visual angle range.
The invention also provides a horizontal parallax three-dimensional display method based on multilayer liquid crystal, which comprises the following steps:
(1) Rendering a set three-dimensional scene by a computer, and uniformly sampling N (N > 1) horizontal viewpoint images according to a set viewpoint range;
(2) Analyzing the rendered horizontal viewpoint image by the computer, and obtaining a display image corresponding to each layer of liquid crystal display panel according to the set horizontal diffusion angle, the multi-layer liquid crystal display space, the liquid crystal resolution, the number of the viewed viewpoints and the viewpoint position parameters;
(3) Displaying the display image obtained by calculation on each layer of liquid crystal display panel, and performing micro offset calibration on each layer of liquid crystal display panel to enable the central point of the display image to be on the central light line;
(4) The horizontal parallax images superposed on the liquid crystal display panels are visible in the vertical direction after passing through the vertical diffuser;
(5) And (4) modifying the coordinates of the object in the three-dimensional scene, and continuing the steps from 1 to 4 to realize the three-dimensional display effect of the dynamic horizontal parallax.
According to the three-dimensional display method, a plurality of viewpoint images in the horizontal direction of a three-dimensional scene are collected, a multilayer projection image is analyzed according to the light path characteristics of the three-dimensional display device provided by the invention and is displayed on a multilayer liquid crystal panel respectively, and a horizontal parallax image is formed on two eyes in the viewpoint range by modulating light in the horizontal direction through the multilayer liquid crystal panel. According to the invention, through specific sequential light path divergence setting and multilayer liquid crystal light modulation, only horizontal divergent light is debugged, and the horizontal parallax display is focused on, so that the display resolution and the display speed are improved while the three-dimensional image with the horizontal parallax is displayed, and the purpose of improving the three-dimensional display effect is achieved.
Drawings
FIG. 1 is a schematic diagram of a multi-layer liquid crystal based horizontal parallax three-dimensional display device of the present invention;
FIG. 2 is a schematic diagram of the optical path for achieving horizontal parallax according to the present invention;
fig. 3 is a schematic diagram of the optical path of the present invention to achieve visualization of the same image in the vertical range.
Detailed Description
For a clearer understanding of the technical features, objects, and effects of the present invention, the present invention will be described in detail with reference to the accompanying drawings and embodiments.
Fig. 1 is a schematic diagram of a horizontal parallax three-dimensional display device based on multilayer liquid crystal according to an embodiment of the present invention, as shown in fig. 1, including a collimated backlight 1, a horizontal orientation diffuser 2, a liquid crystal display panel array 5 composed of a first liquid crystal display panel 3 and a second liquid crystal display panel 4, and a vertical orientation diffuser 6, which are sequentially arranged along an optical path direction.
For a stereoscopic image, the importance of horizontal parallax is much higher than that of vertical parallax, and the three-dimensional display device provided by the embodiment of the invention focuses on the modulation of horizontal parallax, so that the image analysis speed can be increased, and the resolution of three-dimensional display can also be increased.
Specifically, the collimated backlight source 1 in the embodiment of the present invention uses a white light collimated light source;
specifically, the horizontally oriented diffuser 2 and the vertically oriented diffuser 6 in the embodiment of the present invention are selected to be 60 ° oriented diffuser films. After the light passes through the directional diffusion film, the light can be uniformly scattered on the surface of the directional diffusion film, and the divergence angle is controllable.
Specifically, the multi-layer lcd panel array in the embodiment of the present invention uses two identical lcd panels, the display resolution is 1920 × 1080, the panel interval is 50mm, and each layer of lcd panel displays a calculated specific image to modulate the light in the horizontal direction.
As shown in fig. 2, the horizontal parallax is realized by modulating light rays diverging only in the horizontal direction by a multi-layer liquid crystal display panel (liquid crystal display panel array 5), and finally, after the light rays pass through a vertical diffuser, stereoscopic effect images with the horizontal parallax are provided for a plurality of viewers within a set horizontal viewpoint range.
As shown in fig. 3, the vertical directional diffuser diffuses the light vertically, so that the viewer can see the same stereoscopic image with horizontal parallax on the same vertical line.
Taking the three-dimensional display device shown in fig. 1 as an example, the invention further provides a horizontal parallax three-dimensional display method based on multilayer liquid crystal, and the display method comprises the following steps:
(1) Rendering a set three-dimensional scene by a computer, and uniformly sampling N (N > 1) horizontal viewpoint images according to a set viewpoint range;
(2) Analyzing all horizontal dot diagrams obtained by rendering through the computer, and obtaining a display image corresponding to each layer of liquid crystal display panel through iterative calculation according to the set horizontal diffusion angle, the set multilayer liquid crystal display interval, the set liquid crystal resolution, the set number of the view points and the set parameters of the view point positions;
(3) Displaying the display image obtained by calculation on each layer of liquid crystal display panel, and performing translation calibration on the display image of each layer of liquid crystal display panel to ensure that the central point of the display image is on the central light ray, thereby ensuring the accuracy of light modulation;
(4) The horizontal parallax images superposed on the liquid crystal display panels are visible in the vertical direction after passing through the vertical diffuser;
(5) And (4) modifying the coordinates of the object in the three-dimensional scene, and continuing the steps from 1 to 4 to realize the three-dimensional display effect of the dynamic horizontal parallax.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can understand that the modifications or substitutions within the technical scope of the present invention are included in the scope of the present invention.
Claims (6)
1. A horizontal parallax three-dimensional display device based on multilayer liquid crystal is characterized in that the three-dimensional display device comprises a collimation backlight source, a horizontal orientation diffuser, a multilayer liquid crystal display panel and a vertical orientation diffuser which are sequentially arranged along the direction of an optical path;
the collimation backlight source is used for emitting collimation light;
the horizontal directional diffuser is used for uniformly dispersing the incoming collimated light rays in a specific horizontal angle;
the multilayer liquid crystal display panel is used for displaying the calculated projection image;
the vertically oriented diffuser is used for uniformly diffusing the incoming light rays in a specific vertical angle.
2. The multi-layer liquid crystal-based horizontal parallax three-dimensional display device of claim 1, wherein the collimated backlight and the horizontally oriented diffuser are in close proximity.
3. The multi-layer liquid crystal-based horizontal parallax three-dimensional display device of claim 1, wherein the collimated backlight and horizontally oriented diffuser sections are replaced with a custom backlight that is divergent in the horizontal direction and collimated in the vertical direction.
4. The device of claim 1, wherein the multi-layered liquid crystal display panel comprises two or more layers of liquid crystal display panels with equal resolution and uniform spacing, and is closely attached to a horizontal orientation diffuser.
5. The device as claimed in claim 4, wherein the vertical directional diffuser is closely attached to the last liquid crystal display panel to diffuse the modulated horizontal divergent light at a specific angle.
6. A horizontal parallax three-dimensional display method based on multilayer liquid crystal is characterized by comprising the following steps:
(1) Rendering a set three-dimensional scene by a computer, and uniformly sampling N horizontal viewpoint images according to a set viewpoint range, wherein N is greater than 1;
(2) Analyzing the rendered horizontal viewpoint image by the computer, and obtaining a display image corresponding to each layer of liquid crystal display panel according to the set horizontal diffusion angle, the multi-layer liquid crystal display space, the liquid crystal resolution, the number of the viewed viewpoints and the viewpoint position parameters;
(3) Displaying the display image obtained by calculation on each layer of liquid crystal display panel, and performing micro offset calibration on each layer of liquid crystal display panel to enable the central point of the display image to be on the central light line;
(4) The horizontal parallax images superposed by the liquid crystal display panels are visible in the vertical direction after passing through the vertical diffuser;
(5) And (4) modifying the coordinates of the object in the three-dimensional scene, and continuing the steps from 1 to 4 to realize the three-dimensional display effect of the dynamic horizontal parallax.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211484031.XA CN115981027A (en) | 2022-11-24 | 2022-11-24 | Horizontal parallax three-dimensional display device and method based on multilayer liquid crystal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211484031.XA CN115981027A (en) | 2022-11-24 | 2022-11-24 | Horizontal parallax three-dimensional display device and method based on multilayer liquid crystal |
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| CN115981027A true CN115981027A (en) | 2023-04-18 |
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| CN202211484031.XA Pending CN115981027A (en) | 2022-11-24 | 2022-11-24 | Horizontal parallax three-dimensional display device and method based on multilayer liquid crystal |
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