CN210323610U - Three-dimensional display device based on front directional light source - Google Patents
Three-dimensional display device based on front directional light source Download PDFInfo
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- CN210323610U CN210323610U CN201921152153.2U CN201921152153U CN210323610U CN 210323610 U CN210323610 U CN 210323610U CN 201921152153 U CN201921152153 U CN 201921152153U CN 210323610 U CN210323610 U CN 210323610U
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Abstract
The utility model provides a three-dimensional display device based on leading directional light source. The display device comprises a directional light source, a vertical scattering layer, a reflecting layer and a liquid crystal display panel. The directional light source, the vertical scattering layer and the reflecting layer are used for controlling the direction of light propagation in the device, part of the light sources in the directional light source are selectively controlled to be lightened, light rays emitted by the directional light source are reflected by the reflecting layer, a plurality of light projection areas can be formed, the liquid crystal display panel provides parallax images corresponding to the light projection areas, a plurality of visual areas can be formed in the space, and when the human eyes are in different visual areas, the parallax images corresponding to the human eyes can be seen, so that stereoscopic vision is generated.
Description
Technical Field
The utility model relates to a display technology, more specifically say, the utility model relates to a stereoscopic display technique.
Background
The stereoscopic display device may be used for display of stereoscopic images. A common stereoscopic display device is composed of a lenticular lens grating, a 2D display panel, and other components, and provides a parallax composite image through the 2D display panel, and displays a stereoscopic image by using a lenticular lens beam splitting effect. However, it is difficult for the conventional stereoscopic display device to display images at full resolution, and therefore the present invention provides a stereoscopic display device based on a front directional light source, which provides a parallax image by using a liquid crystal display panel and controls a projection direction of the parallax image by using the front directional light source, thereby realizing stereoscopic image display. Compared with the traditional three-dimensional display device, in the same time slice gap, the liquid crystal display panel only provides one parallax image and projects the parallax image to the appointed visual area position by utilizing the front directional light source. In the time division multiplexing mode, different parallax images can be projected at different visual area positions, and therefore high-resolution stereoscopic display is achieved.
SUMMERY OF THE UTILITY MODEL
The utility model provides a three-dimensional display device based on leading directional light source. Fig. 1 is a schematic structural diagram of the stereoscopic display device based on the front directional light source. The stereoscopic display device based on the preposed directional light source consists of a directional light source, a vertical scattering layer, a reflecting layer and a liquid crystal display panel. The liquid crystal display panel, the vertical scattering layer and the reflecting layer are sequentially arranged in a close-fitting manner from front to back.
The directional light source is composed of a light source array and a first cylindrical lens grating, and the first cylindrical lens grating is formed by arranging a plurality of cylindrical lenses in the horizontal direction and is used for directionally projecting light in the horizontal direction. The vertical scattering layer is arranged in front of the reflecting layer and is composed of a second cylindrical lens grating, and the second cylindrical lens grating is formed by arranging a plurality of cylindrical lenses in the vertical direction and is used for scattering light rays in the vertical direction. The reflecting layer is a plane reflecting layer and can perform mirror reflection on incident light. The liquid crystal display panel is used to provide a parallax image, which employs a low scattering panel that does not change the traveling direction of light.
The directional light source, the vertical scattering layer and the reflecting layer are used for controlling the direction of light transmission in the device. In the directional light source, light rays emitted by the light source array are projected through the first cylindrical lens grating in the directional light source, and the light rays can be projected to the positions of the vertical scattering layer, the reflecting layer and the liquid crystal display panel and are reflected by the reflecting layer. The light sources at different positions in the light source array are lightened, the light rays of the light sources can be directionally projected through the horizontal light splitting action of the first cylindrical lens grating, and are converged to different horizontal spatial positions after being reflected by the reflecting layer. In the above process, the vertical scattering layer can scatter the light in the vertical direction, so that the projected light can be distributed in the vertical projection area of each horizontal spatial position.
At the same time, part of the light sources in the light source array are lighted, so that only one horizontal space position has light projection in the time, and meanwhile, the liquid crystal display panel provides a parallax image corresponding to the light projection, so that a visual area can be formed at the horizontal space position. In the time division multiplexing, the light sources in the light source array are sequentially turned on, and the liquid crystal display panel provides parallax images corresponding to the light sources, so that a plurality of visual regions can be formed in space. When human eyes are in different visual fields, the corresponding parallax images can be seen, and therefore stereoscopic vision is generated.
Specifically, in the light source array, a part of light sources are lighted, light rays emitted by the light sources are projected through the first cylindrical lens grating in the directional light source and enter the liquid crystal display panel, the relay direction of the light rays is not changed by the liquid crystal display panel, and the light rays reach the second cylindrical lens grating after passing through the liquid crystal display panel. At this time, the propagation of the light is explained in the vertical and horizontal directions.
In the horizontal direction, the second lenticular lens grating is formed by arranging a plurality of lenticular lenses in the vertical direction, does not have a lens condensing effect in the horizontal direction, does not change the light propagation direction in the horizontal direction, and can be ignored. Therefore, after being reflected by the reflecting layer, the light rays are finally converged in the horizontal direction to form a visual area. This process is understood to mean that the mirror image of the directional light source in the reflective layer focuses and projects light to the viewing area location due to the planar reflection of the reflective layer.
In the vertical propagation direction, the second lenticular lens grating is formed by arranging a plurality of cylindrical lenses in the vertical direction, and has a lens condensing effect in the vertical direction. Therefore, after the light passes through the second cylindrical lens grating, the propagation direction of the light is changed in the vertical direction. Then, the light reaches the reflective layer and is specularly reflected, passes through the second lenticular lens again, and is scattered again in the vertical propagation direction.
Therefore, the light rays can form different visual regions in the horizontal direction through the process, and the corresponding parallax images can be seen in the vertical projection region in the visual region.
Preferably, the pixel pitch of the liquid crystal display panel should be greater than the second lenticular grating pitch.
Alternatively, the front and rear positions of the liquid crystal display panel and the vertical scattering layer may be interchanged.
Alternatively, the first cylindrical lenticulation in a directional light source may be replaced by a slit grating.
Alternatively, the second lenticular lens grating may be replaced with other optical structures having one-dimensional scattering power, such as a cylindrical concave lens array, a holographic optical element, an irregular prism array, or the like.
The utility model discloses in, because the parallax image resolution ratio in each visual area all is unanimous with liquid crystal display panel's resolution ratio, so do not have the resolution ratio loss in the traditional structure, can realize the stereoscopic image of high resolution and show.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the directional light source of the present invention.
Fig. 3 is a light path diagram of the horizontal direction in the present invention.
Fig. 4 is a light path diagram of the present invention in the vertical direction.
Icon: 010-stereoscopic display devices based on front-facing directional light sources; 100-a reflective layer; 200-a vertical scattering layer; 300-a liquid crystal display panel; 400-a directional light source; 020-directional light source structure diagram; 410-an array of light sources; 420-a first cylindrical lenticulation; 030-horizontal splitting principle; 301-image of liquid crystal display panel in reflective layer; 411-image of light source array in reflective layer; 421 — the image of the first cylindrical lenticulation in the reflective layer; 040-principle of vertical scattering, 210-second cylinder grating.
It should be understood that the above-described figures are merely schematic and are not drawn to scale.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Examples
Fig. 1 is a schematic structural diagram of a stereoscopic display device 010 based on a front directional light source according to this embodiment. In the figure, the x-coordinate represents the horizontal direction in space, the y-coordinate represents the vertical direction in space, and z represents the direction perpendicular to the x-y plane. Referring to fig. 1, the present embodiment provides a stereoscopic display device 010 based on a front directional light source, which comprises a directional light source 400, a vertical scattering layer 200, a reflective layer 100 and a liquid crystal display panel 300. The liquid crystal display panel 300, the vertical scattering layer 200, and the reflective layer 100 are closely attached in this order.
The directional light source 400 is composed of a light source array 410 and a first lenticular lens 420, and the first lenticular lens 420 is composed of a plurality of cylindrical lenses arranged in a horizontal direction for directionally projecting light in the horizontal direction, please refer to fig. 2. The vertical diffusion layer 200 is disposed in front of the reflective layer 100 and is formed of a second lenticular lens 210, and the second lenticular lens 210 is formed by a plurality of lenticular lenses arranged in a vertical direction and used for diffusing light in the vertical direction. The reflective layer 100 is a planar reflective layer, and can perform specular reflection on incident light. The liquid crystal display panel 300 is used to provide a parallax image, which employs a low scattering panel that does not change the traveling direction of light.
The stereoscopic display device 010 based on the front directional light source according to the embodiment will be further described below.
The directional light source 400, the vertical scattering layer 200 and the reflective layer 100 are used to control the direction of light propagation in the device. In the directional light source 400, light emitted from the light source array 410 is projected through the first lenticular lens 420 in the directional light source, and the light is projected to the positions of the vertical scattering layer 200, the reflective layer 100 and the liquid crystal display panel 300 and reflected by the reflective layer 100. The light sources at different positions in the light source array 410 are illuminated, and the light rays of the light sources can be directionally projected through the horizontal light splitting effect of the first cylindrical lenticulation 420, and are converged to different horizontal spatial positions after being reflected by the reflecting layer. In the above process, the vertical diffusion layer 200 can diffuse the light in the vertical direction, so that the projected light can be distributed in the vertical projection area of each horizontal spatial position.
At the same time, some light sources in the light source array 410 are turned on, so that only a single horizontal spatial position has light projection at the time, and at the same time, the liquid crystal display panel 300 provides a parallax image corresponding to the light projection, so that a viewing zone can be formed at the horizontal spatial position. In the time division multiplexing, the light sources in the light source array 410 are sequentially turned on, and the liquid crystal display panel 300 provides a parallax image corresponding thereto, so that a plurality of viewing zones can be formed in space. When human eyes are in different visual fields, the corresponding parallax images can be seen, and therefore stereoscopic vision is generated.
Specifically, the directional light source structure is similar to that of a conventional stereoscopic display device, the light source array 410 is similar to a 2D display panel in the conventional stereoscopic display device, and the first lenticular lens is a light splitting element. Each light source in the light source array 410 can be understood as a pixel on the 2D display panel, and the spatial position of the pixel on the 2D display panel is also the same as that of the pixel on the conventional stereoscopic display device. The light sources at corresponding positions in each period can be projected by the first cylindrical lenticulation 410 and converged to form a viewing zone. The light sources corresponding to the same viewing zone in the light source array 410 are turned on, the emitted light is projected through the first lenticular lens 420 in the directional light source 400 and enters the liquid crystal display panel 300, the liquid crystal display panel 300 does not change the direction of the light, and the light passes through the liquid crystal display panel 300 and then reaches the second lenticular lens 210. At this time, the propagation of the light is explained in the vertical and horizontal directions.
In the horizontal direction, the second lenticular lens 210 is formed by arranging a plurality of lenticular lenses in the vertical direction, and does not have a lens condensing effect in the horizontal direction, and does not change the light propagation direction in the horizontal direction, so the second lenticular lens 210 can be omitted. Referring to fig. 3, for clarity of the imaging process, the imaging optical path is optically expanded after ignoring the element cylindrical grating 210 that does not change the propagation direction. In fig. 3, the light source array 410 and the first lenticular lens 420 can be imaged in the reflective layer 100, wherein the light emitted from the light source array 410 can be projected through the image 421 formed by the first lenticular lens 420. After the light source array 410 respectively illuminates three groups of light sources at different positions, the first cylindrical lens grating 421 can respectively project the light to the viewing zones 1-3. In the process, the light rays respectively pass through the image 301 of the liquid crystal display panel in the reflecting layer and the liquid crystal display panel 300, so that parallax image display is realized, and 3 visual regions are formed.
For the transmission of light in the vertical propagation direction, please refer to fig. 4. Since the second lenticular lens 210 is formed by arranging a plurality of lenticular lenses in the vertical direction, it has a lens condensing effect in the vertical direction. Therefore, the light beam passes through the second lenticular lens 210 and then the propagation direction is changed in the vertical direction. Subsequently, the light reaches the reflective layer 100 and is specularly reflected, and then passes through the second lenticular lens grating 210 again, and is scattered in the vertical propagation direction again.
Therefore, the light rays can form different visual regions in the horizontal direction through the process, and the corresponding parallax images can be seen in the vertical projection region in the visual region.
In summary, please refer to fig. 3 for a principle of implementing parallax image display in each horizontal direction in the present embodiment. At the first moment, the light source corresponding to the dot-dash line in the light source array 410 is turned on, the light beam thereof can be projected to the viewing area 1 by the first lenticular lens 420, and simultaneously, the liquid crystal display panel 300 displays the parallax image corresponding to the spatial position of the viewing area 1, thereby realizing the parallax image display of the viewing area 1. Similarly, at the second moment, the light source corresponding to the solid line in the light source array 410 is turned on, and the liquid crystal display panel 300 displays the parallax image corresponding to the spatial position of the viewing area 2, so that the parallax image display of the viewing area 2 is realized; at the third moment, the light source corresponding to the dotted line in the light source array 410 is turned on, and the liquid crystal display panel 300 displays the parallax image corresponding to the spatial position of the viewing zone 3, thereby implementing the parallax image display of the viewing zone 3. When the left eye and the right eye of a viewer are respectively positioned in different vision areas, the corresponding parallax images can be respectively seen, so that stereoscopic vision is generated.
In this embodiment, since the resolution of the parallax image in each viewing zone is consistent with the resolution of the liquid crystal display panel 300, there is no loss of resolution in the conventional structure, and high-resolution stereoscopic image display can be realized.
Claims (5)
1. A stereoscopic display device based on a front directional light source is characterized in that: the stereo display device based on the preposed directional light source consists of a directional light source, a vertical scattering layer, a reflecting layer and a liquid crystal display panel, wherein the liquid crystal display panel, the vertical scattering layer and the reflecting layer are sequentially and closely arranged in front and at the back, wherein the directional light source is composed of a light source array and a first cylindrical lens grating, the first cylindrical lens grating is formed by arranging a plurality of cylindrical lenses in the horizontal direction, for directing the projected light in a horizontal direction, said vertical scattering layer being placed in front of the reflecting layer, which is composed of a second cylindrical lens grating formed by a plurality of cylindrical lenses arranged in the vertical direction, the liquid crystal display panel is used for scattering light rays in the vertical direction, the reflecting layer is a plane reflecting layer and can perform mirror reflection on incident light rays, the liquid crystal display panel is used for providing parallax images, and the low-scattering panel is adopted and does not change the propagation direction of the light rays.
2. The stereoscopic display apparatus based on the front directional light source as claimed in claim 1, wherein: the directional light source, the vertical scattering layer and the reflecting layer are used for controlling the direction of light transmission in the device, in the directional light source, light emitted by the light source array is projected through a first cylindrical lens grating in the directional light source, the light can be projected to the positions of the vertical scattering layer, the reflecting layer and the liquid crystal display panel and reflected by the reflecting layer, light sources at different positions in the light source array are lightened, the light can be directionally projected through the horizontal light splitting action of the first cylindrical lens grating and is converged to different horizontal spatial positions after being reflected by the reflecting layer, in the process, the vertical scattering layer can scatter the light in the vertical direction, so that the projected light can be distributed in the vertical projection area of each horizontal spatial position, and partial light sources in the light source array are lightened at the same moment, so that only the only one horizontal spatial position has light projection in the moment, meanwhile, the liquid crystal display panel provides parallax images corresponding to the parallax images, so that a visual area can be formed at the horizontal space position, the light sources in the light source array are sequentially turned on in a time division multiplexing mode, the liquid crystal display panel provides the parallax images corresponding to the parallax images, a plurality of visual areas can be formed in the space, and when human eyes are in different visual areas, the parallax images corresponding to the human eyes can be seen, so that stereoscopic vision is generated.
3. The stereoscopic display apparatus based on the front directional light source as claimed in claim 1, wherein: the front and back positions of the liquid crystal display panel and the vertical scattering layer can be interchanged.
4. The stereoscopic display apparatus based on the front directional light source as claimed in claim 1, wherein: the first cylindrical lenticulation in a directional light source may be replaced by a slit grating.
5. The stereoscopic display apparatus based on the front directional light source as claimed in claim 1, wherein: the second lenticular lens grating may be replaced by an array of cylindrical concave lenses or an array of irregular prisms.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921152153.2U CN210323610U (en) | 2019-07-22 | 2019-07-22 | Three-dimensional display device based on front directional light source |
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| CN201921152153.2U CN210323610U (en) | 2019-07-22 | 2019-07-22 | Three-dimensional display device based on front directional light source |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110286496A (en) * | 2019-07-22 | 2019-09-27 | 成都工业学院 | A kind of 3 d display device based on preposition directional light |
| CN112684610A (en) * | 2021-03-11 | 2021-04-20 | 成都工业学院 | Slit grating 3D display with high optical efficiency |
| CN115981026A (en) * | 2023-03-22 | 2023-04-18 | 成都工业学院 | Crosstalk-free grating stereoscopic display |
-
2019
- 2019-07-22 CN CN201921152153.2U patent/CN210323610U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110286496A (en) * | 2019-07-22 | 2019-09-27 | 成都工业学院 | A kind of 3 d display device based on preposition directional light |
| CN110286496B (en) * | 2019-07-22 | 2024-01-30 | 成都工业学院 | Stereoscopic display device based on front directional light source |
| CN112684610A (en) * | 2021-03-11 | 2021-04-20 | 成都工业学院 | Slit grating 3D display with high optical efficiency |
| CN112684610B (en) * | 2021-03-11 | 2021-06-18 | 成都工业学院 | Slit grating 3D display with high optical efficiency |
| CN115981026A (en) * | 2023-03-22 | 2023-04-18 | 成都工业学院 | Crosstalk-free grating stereoscopic display |
| CN115981026B (en) * | 2023-03-22 | 2023-05-12 | 成都工业学院 | Crosstalk-free grating stereoscopic display |
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