Optical display device and control method thereof

Abstract

This invention discloses an optical display device and its control method. The optical display device includes: a grating layer and a display screen stacked together; the display screen includes a pixel layer; the pixel layer includes arrayed sub-pixels and black matrix regions between the sub-pixels; the grating layer includes a first surface; the first surface includes a first region and a second region, the roughness of the first region being greater than the roughness of the second region; along the thickness direction of the optical display device, the projection of the first region onto the first plane and the projection of the black matrix regions onto the first plane at least partially overlap. The technical solution of this invention, by setting a first region with a larger roughness on the first surface of the grating layer and ensuring that the first region at least partially overlaps with the black matrix regions, causes the imaging light to be scattered in the first region, achieving a uniform light distribution, thus improving the problem of discontinuity in the light-emitting surface caused by the black matrix regions and reducing the rainbow effect.

Description

Technical Field

[0001] This invention relates to the field of optical equipment technology, and in particular to an optical display device and its control method. Background Technology

[0002] Existing light field products with lenses, such as grating cards and head-up displays (HUDs), exhibit a "rainbow pattern" phenomenon during use, which affects the user experience.

[0003] Taking a lenticular lens grating as an example, in the design of the light field, the lenticular lens grating has both beam splitting and magnification functions. With appropriate parameter settings, two different images can be projected into the left and right eyes of the human eye, allowing each eye to receive different images, thus forming a 3D visual experience in the brain. However, because the lenticular lens magnifies the pixels within its coverage area, the resolution of this product decreases. Furthermore, due to the magnification effect of the lenticular lens grating, the pixels below it are magnified. For light sources like liquid crystal displays (LCDs), pixels are not continuous; there are black matrix (BM) regions between pixels and even between sub-pixels, used to obscure circuit traces. These BM regions cause discontinuities in the LCD's light-emitting surface, which are amplified by the lenticular lens grating, resulting in uneven brightness in the perceived image. Additionally, because different wavelengths of light have different refractive indices in the lens, dispersion occurs, causing the "rainbow pattern" observed in the image. Summary of the Invention

[0004] This invention provides an optical display device and its control method to solve the rainbow effect problem in existing optical display devices.

[0005] According to one aspect of the present invention, an optical display device is provided, comprising: a grating layer and a display screen stacked together; The display screen includes a pixel layer; the pixel layer includes sub-pixels arranged in an array and black matrix areas between the sub-pixels; The grating layer includes a first surface; the first surface includes a first region and a second region, wherein the roughness of the first region is greater than that of the second region; Along the thickness direction of the optical display device, the projection of the first region onto the first plane overlaps at least partially with the projection of the black matrix region onto the first plane.

[0006] Optionally, along the thickness direction of the optical display device, the projection of the first region onto the first plane coincides with the projection of the black matrix region onto the first plane; the projection of the second region onto the first plane coincides with the projection of the sub-pixel onto the first plane.

[0007] Optionally, the first side is the side of the grating layer away from the display screen.

[0008] Optionally, the grating layer includes an array of cylindrical lens gratings.

[0009] Optionally, the arithmetic mean roughness of the first region is between 0.1 μm and 3.0 μm; the arithmetic mean roughness of the second region is less than 0.1 μm.

[0010] Optionally, the haze value in the first region is between 20% and 80%; the haze value in the second region is less than 10%.

[0011] Optionally, the first region is distributed in a periodic strip pattern on the first surface, and the period of the periodic strip pattern is the same as the period of the black matrix region.

[0012] Optionally, along the thickness direction of the optical display device, the overlapping area of ​​the projection of the first region onto the first plane and the projection of the black matrix region onto the first plane accounts for more than 80% of the projected area of ​​the first region onto the first plane.

[0013] According to another aspect of the present invention, a method for manufacturing an optical display device is provided, for manufacturing an optical display device; Preparation methods include: Provides raster layers and displays; The first surface of the grating layer is surface-treated to form a first region; wherein the display screen includes a pixel layer; the pixel layer includes sub-pixels arranged in an array and black matrix regions between the sub-pixels; along the thickness direction of the optical display device, the projection of the first region onto the first plane overlaps with the projection of the black matrix regions onto the first plane; The processed grating layer is bonded to the display screen to form an optical display device.

[0014] Optionally, the first surface of the grating layer is subjected to surface treatment, including: Obtain the distribution parameters of the black matrix region in the display screen; where the distribution parameters are the projection parameters of the black matrix region on the first plane; The first surface of the grating layer is surface-treated according to the distribution parameters.

[0015] Optionally, the grating layer includes an array of lenticular gratings; Before providing the raster layer, the following are also included: Obtain the preset crosstalk threshold; The radius value of the cylindrical lens grating is determined according to a preset crosstalk threshold; wherein the actual crosstalk value of the optical display device is less than or equal to the preset crosstalk threshold.

[0016] Optionally, after bonding the processed grating layer to the display screen to form an optical display device, the device further includes: Acquire simulated images of optical display devices; The stripe severity value of the optical display device is determined based on the pixel brightness deviation between the simulated image and the theoretical image; When the stripe severity value exceeds a preset threshold, the optical display device is deemed unqualified.

[0017] Optionally, the grating layer includes an array of lenticular gratings; After determining that the optical display equipment is unqualified, the following steps are also taken: The grating layer is replaced with a modified grating layer and bonded to the display screen; wherein the radius value of the cylindrical lens grating in the modified grating layer is smaller than the radius value of the cylindrical lens grating in the grating layer.

[0018] The technical solution of the present invention provides a first region with a large roughness on the first surface of the grating layer, and the first region overlaps with the black matrix region to at least partially, so that the imaging light is scattered in the first region to achieve the effect of uniform light, thereby improving the problem of discontinuity of the light-emitting surface caused by the black matrix region and improving the rainbow effect.

[0019] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a cross-sectional structural diagram of an optical display device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a display screen according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the first type of grating layer provided according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the second type of grating layer provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the first surface of the first type of grating layer provided in an embodiment of the present invention; Figure 6 This is a simulation diagram of an optical display device in the prior art; Figure 7This is a simulation diagram of an optical display device according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the first surface of the second type of grating layer provided in an embodiment of the present invention; Figure 9 This is a flowchart of a first method for manufacturing an optical display device according to an embodiment of the present invention; Figure 10 This is a flowchart of a second manufacturing method for an optical display device according to an embodiment of the present invention; Figure 11 This is a flowchart of a third method for manufacturing an optical display device according to an embodiment of the present invention; Figure 12 This is a flowchart of a fourth method for manufacturing an optical display device according to an embodiment of the present invention; Figure 13 This is a flowchart of a fifth method for manufacturing an optical display device according to an embodiment of the present invention. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0023] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0024] Figure 1 This is a cross-sectional structural diagram of an optical display device according to an embodiment of the present invention. Figure 2 This is a schematic diagram of a display screen according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the structure of the first type of grating layer provided in an embodiment of the present invention. Figure 4This is a schematic diagram of the structure of the second type of grating layer provided in an embodiment of the present invention. Figure 5 This is a schematic diagram of the structure of the first surface of the first type of grating layer provided according to an embodiment of the present invention. (Combined with...) Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the optical display device includes: A grating layer 1 and a display screen 2 are stacked together; The display screen 2 includes a pixel layer 20; the pixel layer 20 includes sub-pixels 201 arranged in an array and black matrix regions 202 between the sub-pixels 201; The grating layer 1 includes a first surface 10; the first surface 10 includes a first region 101 and a second region 102, wherein the roughness of the first region 101 is greater than the roughness of the second region 102; Along the thickness direction y of the optical display device, the projection of the first region 101 onto the first plane overlaps at least partially with the projection of the black matrix region 202 onto the first plane.

[0025] The display screen 2 can be used to emit imaging light. The display screen 2 includes a pixel layer 20, which includes red, green and blue sub-pixels arranged in an array. There is a black matrix region 202 between the sub-pixels 201, which can be used to block circuit traces.

[0026] The grating layer 1 can be used to split and amplify the imaging light. The grating layer 1 can project the imaging light into the left and right eyes respectively, so that the left and right eyes receive different images, thereby forming a 3D visual perception in the brain. In some embodiments, the grating layer 1 includes an array of cylindrical lens gratings, which serve the functions of splitting and amplifying the light. The grating layer 1 includes a first surface 10, which includes a first region 101 and a second region 102 with different roughnesses. In some embodiments, the first region 101 of the first surface 10 of the grating layer 1 can be processed to obtain a roughness greater than that of the second region 102. This processing can include sandblasting, acid etching, coating, plating, impact, etc.

[0027] The first surface 10 of the grating layer 1 can be either the light-incident surface or the light-exit surface of the grating layer 1. When the first surface 10 is the light-incident surface of the grating layer 1, since the roughness of the first region 101 is greater than that of the second region 102, and the projection of the first region 101 onto the first plane along the thickness direction y of the optical display device overlaps at least partially with the projection of the black matrix region 202 onto the first plane, the imaging light rays incident on the first surface 10 are more easily scattered in the first region 101, changing the distribution of the imaging light rays before entering the grating layer 1. This makes the distribution of imaging light rays in the overlapping part of the first region 101 and the black matrix region 202 more uniform, improving rainbow effect. Rainbow pattern problem: When the first surface 10 is the light-emitting surface of the grating layer 1, since the roughness of the first region 101 is greater than that of the second region 102, and the projection of the first region 101 onto the first plane and the projection of the black matrix region 202 onto the first plane overlap at least partially along the thickness direction y of the optical display device, the imaging light is normally incident on the grating layer 1. When it exits from the grating layer 1, due to the roughness of the first region 101, the emitted imaging light is scattered in the first region 101, and the imaging light corresponding to the black matrix region 202 is uniformly processed, thus improving the rainbow pattern problem.

[0028] The first plane can be the plane where the grating layer 1 and the display screen 2 meet.

[0029] In some embodiments, the first surface 10 is set to be the side of the grating layer 1 away from the display screen 2, so that the first area 101 of the grating layer 1 can be roughened after the grating layer 1 is attached to the display screen 2.

[0030] It is understandable that the roughness of the first region 101 of the first surface 10 of the grating layer 1 is greater than that of the second region 102, and the first region 101 and the black matrix region 202 partially overlap. When the first surface 10 is the light-emitting surface (e.g.) Figure 3 As shown, the imaging light undergoes certain scattering in the first region 101 corresponding to the beam splitting to achieve homogenization. When the first surface 10 is the incident surface (as shown), Figure 4 As shown, when the imaging light enters the first region 101 corresponding to the grating layer 1, heat dissipation and light homogenization are performed, which improves the rainbow effect.

[0031] For example, Figure 6 This is a simulation diagram of an optical display device in existing technology. From... Figure 6 As can be seen, uneven brightness stripes can be observed in the simulated image. Figure 6The dark areas in the image represent areas whose brightness decreases due to magnification by the black matrix. The optical display device provided in this embodiment of the invention roughens the first surface 10 of the grating layer 1 to form a first region 101, and then attaches the roughened grating layer 1 to one side of the display screen 2. When the optical display device is working, the presence of the first region 101 causes light scattering for uniform illumination. Figure 7 This is a simulation diagram of an optical display device according to an embodiment of the present invention. Figure 7 The rainbow pattern has been significantly improved.

[0032] The technical solution of this invention provides a first region 101 with a large roughness on the first surface 10 of the grating layer 1, and the first region 101 overlaps with the black matrix region 202 at least partially, so that the imaging light is scattered in the first region 101 to achieve the effect of uniform light, thereby improving the problem of discontinuity of the light-emitting surface caused by the black matrix region 202 and improving the rainbow effect.

[0033] Optional, continue to refer to Figure 1 , Figure 2 、 and 3、 Figure 4 and Figure 5 As shown, along the thickness direction y of the optical display device, the projection of the first region 101 onto the first plane coincides with the projection of the black matrix region 202 onto the first plane; the projection of the second region 102 onto the first plane coincides with the projection of the sub-pixel 201 onto the first plane.

[0034] In this configuration, along the thickness direction y of the optical display device, the projection of the first region 101 onto the first plane coincides with the projection of the black matrix region 202 onto the first plane, and the projection of the second region 102 onto the first plane coincides with the projection of the sub-pixel 201 onto the first plane. This allows the imaging light scattered by the first region 101 to uniformly illuminate the entire black matrix region 202, thereby improving the rainbow effect.

[0035] Optional, continue to refer to Figure 1 , Figure 2 、 and 3、 Figure 4 and Figure 5 As shown, the arithmetic mean roughness of the first region 101 is between 0.1 μm and 3.0 μm; the arithmetic mean roughness of the second region 102 is less than 0.1 μm.

[0036] Specifically, the arithmetic mean roughness of the first region 101 can be set between 0.1 μm and 3.0 μm, and the arithmetic mean roughness of the second region 102 can be less than 0.1 μm, thereby ensuring the scattering effect of the first region 101.

[0037] For example, a grating layer 1 is provided, the arithmetic mean roughness of the first surface 10 of the grating layer 1 being less than 0.1 μm. The first surface 10 of the grating layer 1 is roughened to form a first region 101. The arithmetic mean roughness of the first region 101 is between 0.1 μm and 3.0 μm. The arithmetic mean roughness of the first region 101 can be set according to the requirements of the optical display device.

[0038] Optional, continue to refer to Figure 1 , Figure 2 、 and 3、 Figure 4 and Figure 5 As shown, the haze value of the first region 101 is less than 10%; the haze value of the second region 102 is between 20% and 80%.

[0039] To ensure the uniformity of brightness between the first region 101 and the second region 102, the haze value of the first region 101 is set to be lower than that of the second region 102. A higher haze value indicates lower light transmittance. Since the first region 101 overlaps with the black matrix region 202 and the second region 102 overlaps with the pixel layer 20, this light transmittance setting makes the light emitted from the first region 101 and the second region 102 more uniform, thereby improving the problem of discontinuity in the light-emitting surface and enhancing the light output effect of the optical display device.

[0040] Optional, Figure 8 This is a schematic diagram of the structure of the first surface of the second type of grating layer provided in the embodiment of the present invention, combined with... Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 8 As shown, the first region 101 is distributed in a periodic strip pattern on the first surface 10, and the period of the periodic strip pattern is the same as the period of the black matrix region 202.

[0041] Specifically, the first region 101 is set as a strip-shaped region, and the strip-shaped regions are periodically spaced. When the period of the periodic strip distribution is the same as the period of the black matrix region 202, the first region 101 and the black matrix region 202 partially overlap.

[0042] For example, the size of the first region 101 along the first direction is set to be greater than or equal to the size of the black matrix region 202 along the first direction. This setting allows all black matrix regions 202 along the first direction to undergo uniform light processing through the first region 101, thereby improving the display effect of the optical display device.

[0043] The technical solution of this invention simplifies the manufacturing process and improves the display effect of the optical display device by setting the first region 101 to be periodically striped on the first surface 10, and the period of the periodic striped distribution is the same as the period of the black matrix region 202.

[0044] Optional, continue to refer to Figure 1 , Figure 2 、 and 3、 Figure 4 and Figure 8 As shown, along the thickness direction y of the optical display device, the overlapping area of ​​the projection of the first region 101 onto the first plane and the projection of the black matrix region 202 onto the first plane accounts for more than 80% of the projected area of ​​the first region 101 onto the first plane.

[0045] In order to ensure uniform lighting effect on the corresponding part of the black matrix region 202, the overlapping area of ​​the projection of the first region 101 on the first plane and the projection of the black matrix region 202 on the first plane is set to account for more than 80% of the projection area of ​​the first region 101 on the first plane, thereby improving the rainbow effect problem.

[0046] Based on the same inventive concept. Figure 9 This is a flowchart of a first method for manufacturing an optical display device according to an embodiment of the present invention, combined with... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 9 As shown, this embodiment of the invention provides a method for manufacturing an optical display device, used to manufacture an optical display device; Preparation methods include: S10 provides a raster layer and a display screen.

[0047] The display screen 2 is used to emit imaging light. The display screen 2 includes a pixel layer 20, which contains an array of red, green, and blue sub-pixels 201. Black matrix regions 202 exist between the sub-pixels 201, and these black matrix regions 202 can be used to block circuit traces. The grating layer 1 is used to split and amplify the imaging light. The grating layer 1 can project the imaging light into the left and right eyes respectively, allowing the left and right eyes to receive different images, thus forming a 3D visual experience in the brain.

[0048] S11. The first surface of the grating layer is surface-treated to form a first region. The display screen 2 includes a pixel layer 20; the pixel layer 20 includes sub-pixels 201 arranged in an array and black matrix regions 202 between the sub-pixels 201; along the thickness direction y of the optical display device, the projection of the first region 101 onto the first plane overlaps with the projection of the black matrix regions 202 onto the first plane.

[0049] The surface treatment can be sandblasting, acid etching, coating, plating, impact treatment, etc., and the embodiments of the present invention do not limit it.

[0050] It is understandable that the position of the first region 101 is determined by the position of the black matrix region 202, so as to ensure that after the grating layer 1 is attached to the display screen 2, the first region 101 and the black matrix region 202 partially overlap.

[0051] S12. The processed grating layer is bonded to the display screen to form an optical display device.

[0052] For example, a grating layer 1 and a display screen 2 are first provided. The roughness of the first surface 10 of the grating layer 1 is altered using a plasma beam impaction method according to the position of the black matrix region 202 in the display screen 2, thereby forming a first region 101. The processed grating layer 1 is then bonded to the display screen 2 to form an optical display device. The bonded first region 101 and the black matrix region 202 at least partially overlap.

[0053] The technical solution of this invention forms a first region 101 by surface processing the first surface 10 of the grating layer 1, and the first region 101 and the black matrix region 202 overlap at least partially, so that the imaging light is scattered in the first region 101 to play a role in uniform light, thereby improving the problem of discontinuity of the light-emitting surface caused by the black matrix region 202 and improving the rainbow effect.

[0054] Based on the above embodiments, Figure 10 This is a flowchart of a second manufacturing method for an optical display device according to an embodiment of the present invention, combined with... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 10 As shown, the preparation method includes: S20 provides a raster layer and a display screen.

[0055] S21. Obtain the distribution parameters of the black matrix region in the display screen. The distribution parameters are the projection parameters of the black matrix region 202 on the first plane.

[0056] The distribution parameters can characterize the shape, position, size, and other parameters of the black matrix region 202 on the first plane. Since the first region 101 needs to overlap with the black matrix region 202 at least partially, it is necessary to obtain the distribution parameters of the black matrix region 202 in the display screen 2.

[0057] S22. Perform surface treatment on the first surface of the grating layer according to the distribution parameters.

[0058] When the shape, position, and size of the black matrix region 202 on the first plane are known, the outline of the first region 101 can be determined based on the position of the grating layer 1 on the first plane. After determining the outline of the first region 101, the outline region is roughened by a process.

[0059] S23. The processed grating layer is bonded to the display screen to form an optical display device.

[0060] In order to ensure the accuracy of the preparation of the first region 101, the technical solution of this invention obtains the distribution parameters of the black matrix region 202 in the display screen 2 in advance, so as to ensure the light output effect of the optical display device.

[0061] Based on the above embodiments, Figure 11 This is a flowchart of a third manufacturing method for an optical display device according to an embodiment of the present invention, combined with... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 11 As shown, the grating layer 1 includes an array of cylindrical lens gratings; the fabrication method includes: S30. Obtain the preset crosstalk threshold.

[0062] Crosstalk value measures the degree of mutual interference between different display channels, pixels, or signals in an optical display device. The preset crosstalk threshold is the maximum allowable crosstalk value for the optical display device.

[0063] S31. Determine the radius value of the cylindrical lens grating based on the preset crosstalk threshold. The actual crosstalk value of the optical display device is less than or equal to the preset crosstalk threshold.

[0064] In this invention, since the lenticular grating is composed of convex lenses, the convex lenses magnify the black matrix region 202, leading to discontinuities in the light-emitting surface of the optical display device. Reducing the radius of the lenticular grating can change the focal length of the convex lenses, thereby altering the magnification of the lenticular grating for the black matrix region 202. The technical solution of this embodiment allows for the selection of a suitable radius value for the lenticular grating based on a preset crosstalk threshold, ensuring the imaging effect of the optical display device.

[0065] Understandably, the smaller the radius of the lenticular lens grating, the worse the beam splitting and the greater the crosstalk. Therefore, within the allowable crosstalk range, the smallest possible radius of the lenticular lens grating should be chosen to improve rainbow patterns. However, an excessively small radius of the lenticular lens grating leads to a significant decrease in beam splitting performance; therefore, the specific range of lenticular lens grating radius values ​​must be adjusted based on the optical display device.

[0066] The technical solution of this invention obtains a preset crosstalk threshold, determines the radius value of the cylindrical lens grating based on the preset crosstalk threshold, and reduces the magnification of the cylindrical lens grating to the black matrix region 202 by reducing the radius value of the cylindrical lens grating, thereby reducing the crosstalk value of the optical display device and improving the imaging effect of the optical display device.

[0067] S32 provides a raster layer and a display screen.

[0068] S33. Perform surface treatment on the first surface of the grating layer to form the first region.

[0069] S34. The processed grating layer is bonded to the display screen to form an optical display device.

[0070] Based on the above embodiments, Figure 12 This is a flowchart of a fourth manufacturing method for an optical display device according to an embodiment of the present invention, combined with... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 12 As shown, the grating layer 1 includes an array of cylindrical lens gratings; the fabrication method includes: S40 provides a raster layer and a display screen.

[0071] S41. Perform surface treatment on the first surface of the grating layer to form the first region.

[0072] S42. The processed grating layer is bonded to the display screen to form an optical display device.

[0073] S43. Obtain a simulation image of the optical display device.

[0074] One method is to obtain simulated images of optical display devices by building an optical model system.

[0075] S44. Determine the stripe severity value of the optical display device based on the pixel brightness deviation between the simulated image and the theoretical image.

[0076] The theoretical image can be a standard image. The stripe intensity value can be a parameter characterizing the degree of rainbow stripes. The stripe intensity value in the simulated image can be determined by comparing the pixel brightness deviation between the simulated image and the theoretical image.

[0077] S45. When the stripe severity value is greater than the preset threshold, the optical display device is deemed unqualified.

[0078] The preset threshold can be determined based on the human eye's perception limit of rainbow patterns. For example, if the preset threshold is set to 5%, then when the stripe intensity value is less than or equal to 5%, the optical display device is considered qualified. When the stripe intensity value is greater than 5%, the optical display device is considered unqualified.

[0079] The technical solution of this invention involves acquiring a simulation image of the optical display device after its fabrication, determining the stripe severity value using the simulation image and the theoretical image, judging whether the optical display device is qualified based on the stripe severity value, and simulating the degree of rainbow pattern perceived by the human eye using the stripe severity value, thereby fabricating an optical display device that meets the requirements of human eye perception.

[0080] Based on the above embodiments, Figure 13 This is a flowchart of a fifth method for manufacturing an optical display device according to an embodiment of the present invention, combined with... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 13 As shown, the grating layer 1 includes an array of cylindrical lens gratings; the fabrication method includes: S50 provides a raster layer and a display screen.

[0081] S51. Perform surface treatment on the first surface of the grating layer to form the first region.

[0082] S52. The processed grating layer is bonded to the display screen to form an optical display device.

[0083] S53. Obtain a simulation image of the optical display device.

[0084] S54. Determine the stripe severity value of the optical display device based on the pixel brightness deviation between the simulated image and the theoretical image.

[0085] S55. When the stripe severity value is greater than the preset threshold, the optical display device is deemed unqualified.

[0086] S56. Replace the grating layer with a modified grating layer and bond it to the display screen. The radius of the cylindrical lens grating in the modified grating layer 1 is smaller than the radius of the cylindrical lens grating in the grating layer 1.

[0087] When an optical display device is deemed unqualified, it needs to be corrected. Since reducing the radius of the lenticular grating can change the focal length of the convex lens, thereby changing the magnification of the lenticular grating for the black matrix region 202, after determining that the current optical display device is unqualified, the grating layer 1 of the optical display device is replaced with a correction grating layer 1, the radius of which is smaller than that of the grating layer 1.

[0088] In some embodiments, after the modified grating layer 1 is attached, a simulation image can be acquired and the stripe severity value can be determined based on the simulation image and the theoretical image. The qualification of the optical display device can then be determined based on the stripe severity value and a preset threshold.

[0089] The technical solution of this invention improves the display effect of the optical display device by replacing the grating layer 1 of the optical display device with a correction grating layer 1 with a smaller radius value after the optical display device is defective.

[0090] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0091] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. An optical display device, characterized by include: Layered raster layers and display screen; The display screen includes a pixel layer; the pixel layer includes sub-pixels arranged in an array and black matrix regions between the sub-pixels; The grating layer includes a first surface; the first surface includes a first region and a second region, wherein the roughness of the first region is greater than the roughness of the second region; Along the thickness direction of the optical display device, the projection of the first region onto the first plane overlaps at least partially with the projection of the black matrix region onto the first plane.

2. The optical display device of claim 1, wherein, Along the thickness direction of the optical display device, the projection of the first region onto the first plane coincides with the projection of the black matrix region onto the first plane; the projection of the second region onto the first plane coincides with the projection of the sub-pixel onto the first plane.

3. The optical display device of claim 1, wherein, The first side is the side of the grating layer that is away from the display screen.

4. The optical display device of claim 1, wherein, The grating layer includes an array of cylindrical lens gratings.

5. The optical display device according to claim 1, characterized in that, The arithmetic mean roughness of the first region is between 0.1 μm and 3.0 μm; the arithmetic mean roughness of the second region is less than 0.1 μm.

6. The optical display device according to claim 1, characterized in that, The haze value in the first region is less than 10%; the haze value in the second region is between 20% and 80%.

7. The optical display device according to claim 1, characterized in that, The first region is distributed in a periodic strip pattern on the first surface, and the period of the periodic strip pattern is the same as the period of the black matrix region.

8. The optical display device according to claim 1, characterized in that, Along the thickness direction of the optical display device, the overlapping area of ​​the projection of the first region onto the first plane and the projection of the black matrix region onto the first plane accounts for more than 80% of the projected area of ​​the first region onto the first plane.

9. A method for manufacturing an optical display device, characterized in that, Used to manufacture the optical display device according to any one of claims 1-8; The preparation method includes: Provides raster layer and display screen; The first surface of the grating layer is surface-treated to form a first region; wherein the display screen includes a pixel layer; the pixel layer includes sub-pixels arranged in an array and black matrix regions between the sub-pixels; along the thickness direction of the optical display device, the projection of the first region onto a first plane overlaps with the projection of the black matrix regions onto the first plane; The processed grating layer is bonded to the display screen to form the optical display device.

10. The preparation method according to claim 9, characterized in that, The first surface of the grating layer is subjected to surface treatment, including: Obtain the distribution parameters of the black matrix region in the display screen; wherein, the distribution parameters are the projection parameters of the black matrix region on the first plane; The first surface of the grating layer is surface-treated according to the distribution parameters.

11. The preparation method according to claim 9, characterized in that, The grating layer includes an array of cylindrical lens gratings; Before providing the raster layer, the following are also included: Obtain the preset crosstalk threshold; The radius value of the cylindrical lens grating is determined according to the preset crosstalk threshold; wherein the actual crosstalk value of the optical display device is less than or equal to the preset crosstalk threshold.

12. The preparation method according to claim 9, characterized in that, After bonding the processed grating layer to the display screen to form the optical display device, the method further includes: Obtain a simulated image of the optical display device; The stripe severity value of the optical display device is determined based on the pixel brightness deviation between the simulated image and the theoretical image; When the stripe severity value is greater than a preset threshold, the optical display device is deemed unqualified.

13. The preparation method according to claim 12, characterized in that, The grating layer includes an array of cylindrical lens gratings; After determining that the optical display device is defective, the method further includes: The grating layer is replaced with a modified grating layer and bonded to the display screen; wherein the radius value of the lenticular grating in the modified grating layer is smaller than the radius value of the lenticular grating in the grating layer.

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