Lenticular gratings with interlaced lenticular units, 3D display screens, and methods for fabricating lenticular gratings.

Abstract

This invention discloses a lenticular lens grating with interlaced lenticular lens units, comprising a plurality of lenticular lens grating sheets. Each lenticular lens grating sheet has a plurality of lenticular lens units along its length direction. The width direction of each lenticular lens unit corresponds to the length direction of the lenticular lens grating sheet, and the length direction of each lenticular lens unit corresponds to the thickness direction of the lenticular lens grating sheet. The plurality of lenticular lens grating sheets are stacked sequentially along the thickness direction and interlaced sequentially along the length direction by a distance of M / N fractions of the width of each lenticular lens unit, where M is an integer greater than or equal to 2, and N is an integer greater than or equal to 1 and less than M. This invention also discloses a corresponding 3D display screen and a method for manufacturing the lenticular lens grating. Compared with the prior art, the lenticular lens grating of this invention allows for a greater number of viewpoints within a single display unit while maintaining a balance in horizontal and vertical resolution loss, resulting in better display performance.

Description

Technical Field

[0001] This invention relates to a lenticular lens grating and a 3D display screen, and more particularly to a lenticular lens grating with interlaced lenticular lens units and a 3D display screen. Background Technology

[0002] Referring to Chinese Patent CN 201310693259.4, in existing stereoscopic display panels, to prevent resolution loss in one direction, pixel units are set as tilted pixel units, and gratings are set as lenticular lenses parallel to the pixel units. This results in a reduction in resolution for each disparity map in both the length and width directions of the display panel during stereoscopic display, avoiding a single-eye resolution loss in only one direction. However, while this display panel improves the display effect compared to previous technologies, the reduction in resolution is only slight in the vertical direction. The difference in resolution loss between the same horizontal and vertical length areas is significant, and it still cannot sufficiently balance the horizontal and vertical resolution of the stereoscopic display.

[0003] Therefore, there is an urgent need for a 3D display screen that can solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a lenticular grating with interlaced lenticular lens units and a 3D display screen. The lenticular grating does not require reducing the number of viewpoints per unit distance in the horizontal direction, but can increase the distribution of viewpoints in a unit area in the vertical direction over a larger range. This results in a larger number of viewpoints in a single display unit, while maintaining a balance between horizontal and vertical resolution loss, and thus a better display effect.

[0005] To achieve the above objectives, the present invention discloses a lenticular lens grating with interlaced lenticular lens units, comprising a plurality of lenticular lens grating sheets, each lenticular lens grating sheet having a plurality of lenticular lens units along its length direction, the width direction of the lenticular lens units corresponding to the length direction of the lenticular lens grating sheets, the length direction of the lenticular lens units corresponding to the thickness direction of the lenticular lens grating sheets, the plurality of lenticular lens grating sheets being stacked sequentially along the thickness direction, and interlaced sequentially along the length direction by a distance of M / N fractions of the width of the lenticular lens units, where M is an integer greater than or equal to 2, and N is an integer greater than or equal to 1 and less than M.

[0006] Preferably, the edge of the lenticular lens unit is perpendicular to the width direction of the lenticular lens unit and extends along the thickness direction of the lenticular lens grating sheet. The lenticular lens grating of the present invention can be used in conventional display screens where the edges of pixel units are not tilted, and has wide applicability.

[0007] The present invention also discloses a lenticular grating with interlaced lenticular lens units. The front side of the lenticular grating with lenticular lenses is divided into several rows of lenticular gratings along the longitudinal direction. Each row of lenticular gratings has several lenticular lens units along the transverse direction. The length direction of each lenticular lens unit corresponds to the longitudinal direction, and the width direction of the lenticular lens unit corresponds to the transverse direction. The lenticular grating rows are interlaced along the transverse direction by a distance of M / N times the width of the lenticular lens units, where M is an integer greater than or equal to 2, and N is an integer greater than or equal to 1 and less than M.

[0008] Preferably, the edge of the cylindrical lens unit extends along the longitudinal direction.

[0009] The present invention also discloses a 3D display screen with staggered lenticular lens units, including a display module and a lenticular lens grating disposed on the front side of the display module. The display module has a plurality of pixel units. The lenticular lens grating is as described above. The width of the lenticular lens unit corresponds to the horizontal direction of the pixel unit and is equal to M times the horizontal length of the pixel unit. The length of the lenticular lens unit corresponds to the vertical direction of the pixel unit and is equal to L times the vertical length of the pixel unit. The length edge and width edge of the lenticular lens unit are aligned with the vertical edge and horizontal edge of the pixel unit, respectively. L is greater than or equal to 1, and N and M are coprime integers.

[0010] Ideally, M equals 3 and N equals 1. M can also be 2, 4, 5, etc.

[0011] Ideally, L equals 1. L can also be 2, 3, 4, etc.

[0012] Preferably, the display module is a liquid crystal display screen or an LED display screen.

[0013] Specifically, the display module is a liquid crystal display screen, and the pixel unit of the liquid crystal display screen has three sub-pixels arranged in parallel along its horizontal direction and of different colors. Of course, the three sub-pixels can also be arranged in a triangular pattern or other arrangements, and the number of sub-pixels in each pixel unit is not limited to three.

[0014] Preferably, a shielding unit is provided between the pixel unit and the lenticular lens grating. The shielding unit forms a plurality of light source isolation cavities that correspond one-to-one with the pixel unit. The light source isolation cavities surround the corresponding pixel unit to shield light.

[0015] Specifically, an optical unit is also provided between the pixel unit and the lenticular grating to adjust the light emitted by the corresponding pixel unit into parallel light or spherical light and then project it into the lenticular grating.

[0016] This invention also discloses a method for manufacturing a lenticular grating with interlaced lenticular lens units, used to produce the lenticular grating as described above, comprising: providing an optical material plate; processing a plurality of lenticular lenses on the upper surface of the optical material plate to process the substrate into a first lenticular grating, wherein the plurality of lenticular lenses in the first lenticular grating are distributed laterally and the edge of each lenticular lens extends longitudinally; dividing the first lenticular grating longitudinally into a plurality of lenticular grating sheets of equal thickness; sequentially interlacing the lenticular grating sheets laterally by a distance of M / N lenticular lens unit width, and then stacking them longitudinally in an interlaced manner; fixing the stacked lenticular grating stack to a glass substrate using adhesive to form a second lenticular grating; and removing excess material from the lateral and longitudinal edges of the second lenticular grating to form the lenticular grating as described above.

[0017] Ideally, M should be 3, but M can also be 2, 4, 5, etc.

[0018] Preferably, N and M are coprime integers. This scheme ensures that each pixel unit corresponds one-to-one with the viewing angle of the interlacing degree, each pixel unit corresponds to one parallax, and M rows of one pixel unit width correspond to a complete parallax range. The interlacing of M rows of the lenticular grating is a cycle.

[0019] Compared with existing technologies, this invention divides the cylindrical lenses of the lenticular grating into several cylindrical lens units along the longitudinal direction, and arranges them alternately along the longitudinal direction. The cylindrical lens gratings are staggered in Y rows for one cycle. Based on the fact that each cylindrical lens unit can be divided into M disparity maps in the horizontal direction, M disparity maps can be divided simultaneously within a distance of 1 / M the width of a cylindrical lens unit in the M rows of cylindrical lens gratings in the longitudinal direction. This makes the horizontal resolution 1 / M of the original resolution and the vertical resolution 1 / Y of the original resolution within a display area with a width of one cylindrical lens unit and M rows of cylindrical lens units. M*Y viewing angles are formed within a display area with a width of one cylindrical lens unit and M rows of cylindrical lens units. This not only distributes the resolution loss more evenly in both the horizontal and vertical directions, resulting in more viewpoints in the same size display area, but also makes the distribution lines of viewpoints distributed in both the horizontal and vertical directions, which conforms to human viewing habits and provides a better display effect. On the other hand, the present invention not only enables the edge of the cylindrical lens unit in the cylindrical lens grating to be set at the edge of the pixel unit, preventing light interference at the edge of the cylindrical lens grating and effectively improving the display effect of the 3D display screen, but also avoids uneven viewing angle distribution at the four corners of the screen. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the stacked cylindrical lens gratings of the present invention.

[0021] Figure 2 This is a top view of the cylindrical lens grating of the present invention.

[0022] Figure 3 This is a three-dimensional view of the cylindrical lens grating of the present invention.

[0023] Figure 4 This is a view of the multilayer cylindrical grating layers stacked according to the present invention.

[0024] Figure 5 This is a structural diagram of a 3D display screen with interlaced cylindrical lens units in the first embodiment of the present invention.

[0025] Figure 6 This is a structural diagram of a 3D display screen with interlaced cylindrical lens units in the second embodiment of the present invention.

[0026] Figure 7 This is a structural diagram of a 3D display screen with interlaced cylindrical lens units in a preferred embodiment of the present invention.

[0027] Figure 8a and Figure 8b This is a partial fabrication diagram of the cylindrical lens grating of the present invention. Detailed Implementation

[0028] To illustrate the technical content, structural features, objectives, and effects of the present invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0029] refer to Figures 1 to 3 This invention discloses a lenticular lens grating 10 with staggered lenticular lens units 12, comprising a plurality of lenticular lens grating sheets 11. Each lenticular lens grating sheet 11 has a plurality of lenticular lens units 12 along its length direction. The width direction of the lenticular lens unit 12 corresponds to the length direction of the lenticular lens grating sheet 11, and the length direction of the lenticular lens unit 12 corresponds to the thickness direction of the lenticular lens grating sheet 11. The plurality of lenticular lens grating sheets 11 are stacked sequentially along the thickness direction and staggered sequentially by a distance of M / N lenticular lens unit 12 widths, so that within a distance of M / N lenticular lens unit 12 widths along the thickness direction, the lenticular lens grating 10 presents X viewing angles (the complete viewing angle of a lenticular lens) equal to the viewing angle of a lenticular lens. M*1 rows of lenticular lens grating sheets form a cycle, such that M rows of lenticular lens grating sheets form a full viewing angle within a distance of M / 1 lenticular lens unit 12 widths, thereby reducing the resolution in the thickness direction to 1 / M of the original.

[0030] In this embodiment, M equals 3, and 1 equals 1. Of course, M can also be a value greater than or equal to 2, such as 2 or 4. X is the number of angles formed by one cylindrical lens unit. N is an integer greater than or equal to 1 and less than M, and N and M are coprime integers. In this embodiment, N equals 1, but N can also equal 2.

[0031] refer to Figure 2The edge of the lenticular lens unit 12 is perpendicular to the width direction of the lenticular lens unit 12 and extends along the thickness direction of the lenticular lens grating sheet 11. The lenticular lens grating of the present invention can be used in conventional display screens where the edge of the pixel unit 21 is not tilted, and has wide applicability.

[0032] In this embodiment, adjacent lenticular lens plates 11 are in direct contact and fixed together from the bottom by a glass substrate. Several lenticular lens plates 11 are then pressed and positioned from opposite sides of the lenticular lens plate towards the center by two positioning plates. In another embodiment, a shielding strip (shielding line) is provided between pixel units every L rows to separate adjacent rows of pixel units. Adjacent lenticular lens plates 11 can be in direct contact or fixed by adhesive, specifically a transparent adhesive.

[0033] This invention also discloses a method for fabricating a lenticular grating with interlaced lenticular lens units 12, used to produce the lenticular grating as described above, comprising: providing an optical material plate (not shown); processing a plurality of lenticular lenses 102 on the upper surface of the optical material plate to process the substrate into a first lenticular grating 101 (e.g., ...). Figure 8a As shown), in the first lenticular lens grating 101, a plurality of lenticular lenses 102 are distributed laterally and the edge of each lenticular lens 102 extends longitudinally; the first lenticular lens grating 101 is longitudinally divided into a plurality of lenticular lens grating sheets 11 of equal thickness (e.g., ...). Figure 8b The lenticular lens grating 11 has a plurality of lenticular lens units 12 formed along its length; the lenticular lens grating 11 is then stacked longitudinally in an alternating pattern, with the distance of M / N lenticular lens units 12 being staggered laterally (e.g., ...). Figure 1 As shown), the stacked lenticular lens gratings are fixed to the glass substrate using adhesive to form a second lenticular lens grating; the excess material at the transverse and longitudinal edges of the second lenticular lens grating is removed to form lenticular lens grating 10 (as shown). Figure 3 (As shown). In this embodiment, M equals 3, and 1 equals 1. Of course, M can also be a value greater than or equal to 2, such as 2 or 4. N is an integer greater than or equal to 1 and less than M.

[0034] Of course, a lenticular lens grating can also be a lenticular lens grating that is integrally processed from a single plate, such as by cutting, and is not limited to stacking multiple lenticular lens grating sheets 11.

[0035] Ideally, N and M are coprime integers.

[0036] In this embodiment, multiple lenticular lens plates 11 are in direct contact and fixed together from the bottom by a glass substrate. They are then positioned by two positioning plates pressing them from opposite sides of the lenticular lens plate towards the center. In another embodiment, a shielding strip (shielding line) is provided between pixel units every L rows to separate adjacent rows of pixel units. The multiple lenticular lens plates 11 can be in direct contact or fixed by adhesive, which is a transparent adhesive.

[0037] refer to Figure 4 This is a schematic diagram of the viewing angles formed by stacking three lenticular lens gratings 11 sequentially according to the present invention. In this embodiment, each lenticular lens unit 12 of each lenticular lens grating 11 has sub-viewpoints 1, 2, 3, 4, 5, 6, 7, 8, and 9. Adjacent lenticular lens gratings 11 are staggered by a distance equal to one-third the width of a lenticular lens unit 12, that is, adjacent lenticular lens gratings 11 are staggered by three sub-viewpoints. At the positions corresponding to sub-viewpoints 1, 2, and 3 of the first row of lenticular lens gratings 11, the sub-viewpoints of the second row of lenticular lens gratings 11 correspond to 4, 5, and 6, and the sub-viewpoints of the third row of lenticular lens gratings 11 correspond to 7, 8, and 9, so that sub-viewpoints 1-9 are arranged sequentially in each row and column of a lenticular lens grating 10.

[0038] refer to Figure 3 The lenticular lens grating 10 of the present invention has its front side having lenticular lenses divided longitudinally into several rows of lenticular lens gratings. Each row of lenticular lens gratings has several lenticular lens units 12 transversely. The length direction of each lenticular lens unit 12 corresponds to the longitudinal direction, and the width direction of each lenticular lens unit 12 corresponds to the transverse direction. N and M are coprime integers, such that the lenticular lens grating rows are staggered transversely by a distance of M / N fractions of the width of lenticular lens units 12, allowing for M viewing angles (the complete viewing angle of a lenticular lens) along the thickness direction within the M rows and a distance of M / M fractions of the width of lenticular lens units 12 of the lenticular lens grating. The edges of the lenticular lens units 12 extend longitudinally.

[0039] refer to Figure 5 In a first embodiment, the present invention also discloses a 3D display screen 100 with staggered lenticular lens units 12, including a display module 20 and a lenticular lens grating 10 disposed on the front side of the display module 20. The display module has a plurality of pixel units 21. As described above, the width of the lenticular lens unit 12 corresponds to the horizontal direction of the pixel unit 21 and is equal to M times the horizontal length of the pixel unit 21. The length of the lenticular lens unit 12 corresponds to the vertical direction of the pixel unit 21 and is equal to L times the vertical length of the pixel unit 21. The length edge and width edge of the lenticular lens unit 12 are aligned with the vertical edge and horizontal edge of the pixel unit 21, respectively. L is an integer greater than or equal to 1. In this embodiment, L is equal to 1.

[0040] One cylindrical lens unit 12 corresponds to M pixel units 21, and the stagger distance between adjacent rows of cylindrical lens units 12 is the width of N pixel units 21 and less than the width of one cylindrical lens unit.

[0041] refer to Figure 4 When the 3D display screen 100 of the present invention performs 3D display, three horizontal pixel units correspond to three viewpoints, and three vertical pixel units correspond to three viewpoints, so that the resolution loss in the horizontal and vertical directions is the same, and the parallax line is maintained in the horizontal and vertical directions of the display module 20. There is no need to reduce the number of viewpoints of the same horizontal length of the display module 20, resulting in a good display effect.

[0042] refer to Figure 5 The display module 20 is a liquid crystal display screen. The pixel unit 21 of the liquid crystal display screen has three sub-pixels a, b, and c arranged in parallel along its horizontal direction and of different colors. Of course, the three sub-pixels a, b, and c can also be arranged in a triangular shape or other arrangements, and the sub-pixels a, b, and c in each pixel unit 21 are not limited to three.

[0043] refer to Figure 6 In the second embodiment, the display module 20 is an LED display screen with a plurality of LED pixel units 21a. The edge of each LED pixel unit 21a is the center line between adjacent LED pixel units 21a.

[0044] For the better option, refer to Figure 7 A shielding unit 30 is provided between the LED pixel unit 21a and the lenticular lens grating 10. The shielding unit 30 forms a plurality of light source isolation cavities 31 corresponding one-to-one with the pixel unit 21. The light source isolation cavities 31 surround the corresponding pixel unit 21 to shield light. The edge of the LED pixel unit 21a is the sidewall of the light source isolation cavity 31. In this embodiment, the shielding unit 30 is a shielding frame composed of shielding walls of a certain height.

[0045] Specifically, an optical unit 40 is also provided between the pixel unit 21a and the lenticular lens grating 10 to adjust the light emitted by the corresponding pixel unit 21a into parallel light or spherical light and then into the lenticular lens grating 10.

[0046] In this embodiment, the display module 20 is an LED display screen, which can be used in large LED displays. However, the structure of the shielding unit 30 can also be used in a liquid crystal display screen, in which case the shielding unit 30 is a simple shielding mesh.

[0047] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A method for fabricating a cylindrical grating with interlaced cylindrical lens units, characterized in that: Used in the production of cylindrical lens gratings, including: Provide an optical material plate; A plurality of cylindrical lenses are processed on the upper surface of the optical material plate to process the substrate into a first cylindrical lens grating. The plurality of cylindrical lenses in the first cylindrical lens grating are distributed laterally and the edge of each cylindrical lens extends longitudinally. The first cylindrical lens grating is longitudinally divided into several cylindrical lens grating sheets of equal thickness; After the lenticular lens grating sheets are staggered in the transverse direction by a distance of M / N lenticular lens unit width, they are stacked in the longitudinal direction. The stacked lenticular lens grating stack is then fixed to the glass substrate with glue. Two positioning plates are then used to press and position the stack from the two opposite sides towards the middle, so that multiple lenticular lens grating sheets are in direct contact to form a second lenticular lens grating. The second lenticular lens grating is formed by removing excess material from its transverse and longitudinal edges. The lenticular lens grating includes several lenticular lens grating sheets, each lenticular lens grating sheet having several lenticular lens units along its length direction. The width direction of the lenticular lens unit corresponds to the length direction of the lenticular lens grating sheet, and the length direction of the lenticular lens unit corresponds to the thickness direction of the lenticular lens grating sheet. Several lenticular lens grating sheets are stacked sequentially along the thickness direction and staggered along the length direction by a distance of M / N lenticular lens unit width, where M is an integer greater than or equal to 2 and N is an integer greater than or equal to 1 and less than M.

2. The method for fabricating a cylindrical grating with interlaced cylindrical lens units as described in claim 1, characterized in that: The edge of the cylindrical lens unit is perpendicular to the width direction of the cylindrical lens unit and extends along the thickness direction of the cylindrical lens grating.

3. A 3D display screen with interlaced lenticular lens units, comprising a display module and a lenticular lens grating disposed on the front side of the display module, wherein the display module has a plurality of pixel units, characterized in that: The lenticular lens grating is a lenticular lens grating fabricated by the lenticular lens unit interlacing lenticular lens grating fabrication method as described in any one of claims 1-2. The width of the lenticular lens unit corresponds to the horizontal direction of the pixel unit and is equal to M times the horizontal length of the pixel unit. The length of the lenticular lens unit corresponds to the vertical direction of the pixel unit and is equal to L times the vertical length of the pixel unit. The length edge and width edge of the lenticular lens unit are respectively aligned with the vertical edge and horizontal edge of the pixel unit. L is an integer greater than or equal to 1.

4. The 3D display screen with interlaced cylindrical lens units as described in claim 3, characterized in that: M equals 3, N equals 1.

5. The 3D display screen with interlaced cylindrical lens units as described in claim 3, characterized in that: N and M are coprime integers.

6. The 3D display screen with interlaced cylindrical lens units as described in claim 3, characterized in that: The display module is a liquid crystal display or an LED display.

7. The 3D display screen with interlaced cylindrical lens units as described in claim 3, characterized in that: A shielding unit is provided between the pixel unit and the lenticular lens grating. The shielding unit forms a plurality of light source isolation cavities that correspond one-to-one with the pixel unit. The light source isolation cavities surround the corresponding pixel unit to shield light.

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