CN116500804B - Time division multiplexing's three-dimensional display device of retroreflection - Google Patents
Time division multiplexing's three-dimensional display device of retroreflection Download PDFInfo
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- CN116500804B CN116500804B CN202310780862.XA CN202310780862A CN116500804B CN 116500804 B CN116500804 B CN 116500804B CN 202310780862 A CN202310780862 A CN 202310780862A CN 116500804 B CN116500804 B CN 116500804B
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- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000003384 imaging method Methods 0.000 abstract description 3
- 239000011521 glass Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/30—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving parallax barriers
- G02B30/31—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving parallax barriers involving active parallax barriers
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Abstract
In order to solve the problem that the traditional device cannot display the same parallax image at different viewing distances in the technical field of stereoscopic display, the invention provides a time division multiplexing retro-reflective stereoscopic display device. The time division multiplexing type three-dimensional retroreflection display device is composed of a transparent liquid crystal display panel, a semi-reflecting and semi-transmitting plate, a retroreflection plate and a light source array. Light rays emitted by any group of light sources in the light source array can form mirror image real images through the semi-reflective plate and the retro-reflective plate, and the mirror image real images are viewing areas corresponding to the group of light sources. The imaging light passes through the transparent liquid crystal display panel, thereby projecting image information. Each group of light sources in the light source array are sequentially lightened; meanwhile, the transparent liquid crystal display panel sequentially provides parallax images corresponding to the respective groups of light sources, thereby forming stereoscopic display. Because the light source mirror image real image positions of each group in the structure can cover different space positions in front and back. Therefore, the invention can enable viewers to see identical parallax images at different viewing distances.
Description
Technical Field
The invention belongs to the technical field of stereoscopic display, and particularly relates to a time division multiplexing retroreflective stereoscopic display device.
Background
In general, a stereoscopic display device is composed of a 2D display panel and a spectroscopic element, which can project parallax images on the 2D display panel to different viewpoint positions in a space, and viewers located at the different viewpoint positions can see the parallax images corresponding thereto, thereby generating stereoscopic vision. However, the conventional stereoscopic display device has an optimal viewing distance, and when a viewer moves away from or approaches a screen, the viewer's eyes simultaneously see a plurality of parallax images, thereby forming crosstalk.
In order to solve the above problems, the present invention provides a time-division multiplexing retroreflective stereoscopic display device. The time division multiplexing type three-dimensional retroreflection display device is composed of a transparent liquid crystal display panel, a semi-reflecting and semi-transmitting plate, a retroreflection plate and a light source array. The semi-reflection semi-transparent plate, the retro-reflection plate and the light source array are used for projecting light rays; the transparent liquid crystal display panel is used for providing parallax images. The light source array is provided with a plurality of groups of light sources, and the light rays emitted by any group of light sources can form a mirror image real image through the semi-reflective semi-transparent plate and the retro-reflective plate, and the mirror image real image is a viewing area corresponding to the group of light sources. When a certain group of light sources are lighted in a time division multiplexing mode, the transparent liquid crystal display panel provides parallax images corresponding to the watching area, so that the invention can respectively provide parallax images in the areas corresponding to the groups of light sources in the light source array and form three-dimensional display. The position of the light source is changed, so that the position of the mirror image real image is changed, and when the light source covers different front and rear space positions, the position of the mirror image real image can also cover different front and rear space positions. Therefore, the invention can enable viewers to see identical parallax images at different viewing distances.
Disclosure of Invention
In order to solve the problem that the traditional stereoscopic display device has the optimal viewing distance, when viewers cannot see the identical parallax images at different viewing distances, the invention provides a time division multiplexing retro-reflective stereoscopic display device.
The time division multiplexing type three-dimensional retroreflection display device is composed of a transparent liquid crystal display panel, a semi-reflecting and semi-transmitting plate, a retroreflection plate and a light source array. The light source array is arranged behind the semi-reflecting and semi-transmitting plate, and the transparent liquid crystal display panel is arranged in a retro-reflecting light path of the retro-reflecting plate.
Preferably, the transparent liquid crystal display panel is placed in front of the half-reflecting and half-transmitting plate.
The transparent liquid crystal display panel is used for providing parallax images. The propagation direction is not changed when the light passes through the transparent liquid crystal display panel.
The semi-reflection semi-transparent plate, the retro-reflection plate and the light source array are used for projecting light rays and forming a viewing area.
The semi-reflective semi-transparent plate can realize the transmission and specular reflection of light at the same time; the retroreflection plate can reflect light rays according to the original incident direction of the light rays.
The light source array is provided with a plurality of groups of light sources, and the light rays emitted by any group of light sources can form a mirror image real image through the semi-reflective semi-transparent plate and the retro-reflective plate, and the mirror image real image is a viewing area corresponding to the group of light sources. In the process of back reflection, the light rays pass through the transparent liquid crystal display panel, so that a viewer in a viewing area can see parallax image information on the transparent liquid crystal display panel; and the space position outside the viewing area cannot be seen by the viewer due to no light projection.
Specifically, based on the positional relationship of the transparent liquid crystal display panel, the semi-reflective semi-transparent plate, the retro-reflective plate and the light source array, the imaging and display processes and principles are as follows:
light emitted by any point light source on any group of light sources can reach the retroreflecting plate after being reflected by the half-reflecting and half-reflecting plate; the retroreflective sheet reflects light rays in the original incident direction; after the light reflected by the retro-reflecting plate is transmitted through the semi-reflecting and semi-transmitting plate, a real image is formed at the mirror image position of the point light source in the semi-reflecting and semi-transmitting plate; all point light sources forming the group of light sources form mirror image real images according to the principle, so that the group of light sources also form mirror image real images; the mirror image real image of the group of light sources is a viewing area corresponding to the group of light sources; because the transparent liquid crystal display panel is arranged in the retroreflection light path of the retroreflection plate, a viewer in the viewing area can see parallax image information on the transparent liquid crystal display panel; the spatial position outside the viewing area is not visible to the viewer due to the lack of light projection.
Each group of light sources in the light source array is sequentially lighted. Meanwhile, the transparent liquid crystal display panel sequentially provides parallax images corresponding to the groups of light sources, so that the invention can respectively provide parallax images in the viewing areas corresponding to the groups of light sources in the light source array and form stereoscopic display.
Because the mirror image real images formed by the light sources of the groups through the semi-reflection semi-transparent plates define the viewing range, when the light sources cover different front and rear space positions, the mirror image real image positions can also cover different front and rear space positions. Therefore, the invention can enable viewers to see identical parallax images at different viewing distances.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic diagram of the present invention.
Icon: 100-transparent liquid crystal display panel; 200-semi-reflecting and semi-transmitting plates; 300-retroreflective sheet; 400-an array of light sources; 410-the light source array mirrors a real image.
It should be understood that the above-described figures are merely schematic and are not drawn to scale.
Description of the embodiments
Fig. 1 is a time division multiplexing retroreflective stereoscopic display device according to the present embodiment. In fig. 1, x is defined as the front-back direction in space, wherein the positive x direction is the back, the negative x direction is the front, y is the horizontal direction in space, z is the vertical direction in space, and k is the long axis direction of the light source group.
The time-division multiplexing type three-dimensional display device comprises a transparent liquid crystal display panel 100, a semi-reflective and semi-transmissive plate 200, a retroreflective plate 300 and a light source array 400. After the retro-reflective plate 300 is placed on the semi-reflective plate 200, the light source array 400 is placed on the semi-reflective plate 200, and the transparent liquid crystal display panel 100 is placed in the retro-reflective light path of the retro-reflective plate 300.
The transparent liquid crystal display panel 100 is placed in front of the transflective plate 200.
The transparent liquid crystal display panel 100 is used to provide parallax images. The propagation direction is not changed when the light passes through the transparent liquid crystal display panel 100.
The half-reflection and half-transmission plate 200, the retro-reflection plate 300 and the light source array 400 are used for projecting light and forming a viewing area.
The semi-reflective and semi-permeable plate 200 is made of a glass plate and a glass semi-permeable film, and can realize transmission and specular reflection of light at the same time; the retroreflective sheet 300 is made of a 3M diamond-grade cubic crystal structured retroreflective film, and reflects light in the original incident direction.
The light source array 400 is provided with a plurality of groups of light sources, the groups of light sources are arranged in the horizontal y direction, and the light rays emitted by any group of light sources can form a mirror image real image through the semi-reflective and semi-reflective plate 200 and the retro-reflective plate 300, and the mirror image real image is the viewing area corresponding to the group of light sources. The light passes through the transparent liquid crystal display panel 100 during the back reflection, so that a viewer in the viewing area can see parallax image information on the transparent liquid crystal display panel 100; and the space position outside the viewing area cannot be seen by the viewer due to no light projection.
Specifically, based on the positional relationship among the transparent liquid crystal display panel 100, the transflective plate 200, the retroreflective plate 300 and the light source array 400, the imaging and displaying process and principle are as follows:
referring to fig. 2, light emitted from any one point light source a on any one group of light sources can reach the retroreflective sheet 300 after being reflected by the transflective sheet 200; the retroreflective sheet 300 reflects light rays in the original incident direction; after the light reflected by the retro-reflection plate 300 is transmitted through the semi-reflection and semi-transmission plate 200, a real image is formed at a mirror image position A' of the point light source A in the semi-reflection and semi-transmission plate 200; all point light sources forming the group of light sources form mirror image real images according to the principle, so that the group of light sources also form mirror image real images; similarly, the light source array 400 will also form a light source array mirror real image 410 at the mirror position in the half-reflecting half-transmitting plate 200; the mirror image real image of the group of light sources is a viewing area corresponding to the group of light sources; since the transparent liquid crystal display panel 100 is disposed in the retro-reflective optical path of the retro-reflective plate 300, a viewer in the viewing area can see parallax image information on the transparent liquid crystal display panel 100; the spatial position outside the viewing area is not visible to the viewer due to the lack of light projection.
When a certain group of light sources is turned on in a time division multiplexing manner, the transparent liquid crystal display panel 100 provides a parallax image corresponding to the viewing area, so that the present invention can provide parallax images in viewing areas corresponding to the respective groups of light sources in the light source array 400, respectively. Since the respective groups of light sources in the light source array 400 are arranged in the horizontal y direction, they can provide parallax image display at different horizontal spatial positions, respectively, thereby forming a stereoscopic display.
Because the mirror image real images formed by the light sources of the groups through the semi-reflection semi-transparent plates define the viewing range, when the light sources cover different front and rear space positions, the mirror image real image positions can also cover different front and rear space positions. Specifically, as shown in fig. 2, the long axis direction of each group of light sources is distributed along the k axis, so that the mirror image real images of each group of light sources are distributed along the k 'axis, and k' and k are in mirror image relationship. Because the k' axis covers different front and rear space ranges along the front and rear directions of the x axis, the invention can enable viewers to see identical parallax images at different viewing distances along the front and rear directions of the x axis.
Claims (2)
1. A time division multiplexed retro-reflective stereoscopic display device, characterized by:
the time division multiplexing type three-dimensional retroreflection display device consists of a transparent liquid crystal display panel, a semi-reflecting and semi-transmitting plate, a retroreflection plate and a light source array; the light source array is arranged behind the semi-reflecting and semi-transmitting plate, and the transparent liquid crystal display panel is arranged in a retro-reflecting light path of the retro-reflecting plate;
the transparent liquid crystal display panel is used for providing parallax images; the propagation direction is not changed when the light passes through the transparent liquid crystal display panel;
the semi-reflection semi-transparent plate, the retro-reflection plate and the light source array are used for projecting light rays and forming a viewing area;
the semi-reflective semi-transparent plate can realize the transmission and specular reflection of light at the same time; the retroreflective sheet can reflect light rays in the original incident direction of the light rays;
the light source array is internally provided with a plurality of groups of light sources which are arranged in the horizontal y direction, and the light rays emitted by any group of light sources can form mirror image real images through the semi-reflective semi-transparent plate and the retro-reflective plate; light emitted by any point light source A on any group of light sources can reach the retroreflecting plate after being reflected by the half-reflecting and half-reflecting plate; the retroreflective sheet reflects light rays in the original incident direction; after the light reflected by the retro-reflecting plate is transmitted through the semi-reflecting and semi-transmitting plate, a real image is formed at a mirror image position A' of the point light source A in the semi-reflecting and semi-transmitting plate; all point light sources forming the group of light sources form mirror image real images according to the principle, so that the group of light sources also form mirror image real images, and the mirror image real images are the viewing areas corresponding to the group of light sources; in the process of back reflection, the light rays pass through the transparent liquid crystal display panel, so that a viewer in a viewing area can see parallax image information on the transparent liquid crystal display panel; the space position outside the watching area cannot be seen by the viewer due to no light projection;
each group of light sources in the light source array are sequentially lightened; meanwhile, the transparent liquid crystal display panel sequentially provides parallax images corresponding to the respective groups of light sources, thereby forming stereoscopic display.
2. A time division multiplexed retro-reflective stereoscopic display device according to claim 1, wherein: the transparent liquid crystal display panel is placed in front of the transflective plate.
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| CN202310780862.XA CN116500804B (en) | 2023-06-29 | 2023-06-29 | Time division multiplexing's three-dimensional display device of retroreflection |
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