CN120215006A - Method for preparing patterned light guide plate - Google Patents
Method for preparing patterned light guide plate Download PDFInfo
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- CN120215006A CN120215006A CN202311816295.5A CN202311816295A CN120215006A CN 120215006 A CN120215006 A CN 120215006A CN 202311816295 A CN202311816295 A CN 202311816295A CN 120215006 A CN120215006 A CN 120215006A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
- G02B6/006—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to produce indicia, symbols, texts or the like
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
- G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0065—Manufacturing aspects; Material aspects
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
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- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
本申请提供一种图案化导光板的制备方法。图案化导光板上形成有至少一组微结构阵列，可与目标方向上的入射光耦合以显示目标图案；制备方法包括：获取目标图案；像素化目标图案，并将像素化的目标图案中的各像素划分为多个不同的像素组合；获取与每个像素组合匹配的微结构模板，并为像素化的目标图案中的各像素匹配对应的微结构模板；根据各像素的微结构模板形成微结构阵列图文，并根据所述微结构阵列图文在导光板上形成所述至少一组微结构阵列。上述制备方法可对原本一整块微结构掩模有效分割，进而在需要改变微结构的方向或者尺寸时，通过改变相应的微结构模板来满足微结构的变化要求，提高了图案化导光板制备的灵活性。
The present application provides a method for preparing a patterned light guide plate. At least one group of microstructure arrays is formed on the patterned light guide plate, which can be coupled with incident light in a target direction to display a target pattern; the preparation method includes: obtaining a target pattern; pixelating the target pattern, and dividing each pixel in the pixelated target pattern into a plurality of different pixel combinations; obtaining a microstructure template that matches each pixel combination, and matching the corresponding microstructure template to each pixel in the pixelated target pattern; forming a microstructure array image according to the microstructure template of each pixel, and forming the at least one group of microstructure arrays on the light guide plate according to the microstructure array image. The above preparation method can effectively divide the original whole microstructure mask, and then when the direction or size of the microstructure needs to be changed, the change requirements of the microstructure can be met by changing the corresponding microstructure template, thereby improving the flexibility of the preparation of the patterned light guide plate.
Description
Technical Field
The invention relates to the technical field of display, in particular to a preparation method of a patterned light guide plate.
Background
The light guide plate is a key core component in the backlight module and can be used for providing a uniform surface light source. Typically, the light guide dots on the reflective surface of the light guide plate are circular laser dots, which are randomly arranged. In order to obtain a uniform surface light source, the dot density is in a proportional relationship with the distance from the light incident surface. If the dot arrangement of the reflecting surface of the light guide plate is in a specific array or a specific pattern arrangement, when light is incident to the region with the dots, the light can be directly emitted from the light guide plate after being reflected or scattered by the light guide dots, so that the bright region is displayed at the position, otherwise, if the region on which the light is incident does not have the dot arrangement, the dark region is displayed. Therefore, if the reflecting surface of the light guide plate is provided with a specific pattern, the light coupled into the light guide plate can show specific pattern display after the specific arranged dot patterns, and the light guide plate can be called a patterned light guide plate. The patterned light guide plate can display specific design patterns, can be applied to a light-facing panel of a game machine and other display scenes at present, and has certain advantages.
However, with the continuous progress of display technology, consumers have increasingly demanded display effects. At present, how to improve the display effect of the patterned light guide plate, such as brightness and uniformity of the pattern, detailed expression capability and viewing angle of the pattern, gray level expression of the pattern or smooth transition of the gray level of the pattern, how to improve the transparency (transmittance) of the patterned light guide plate, etc., also becomes a technical problem or development bottleneck of the patterned light guide plate for display. Even a light guide plate is sometimes needed to realize the display of two or more patterns, and how to avoid the mutual interference of the two or more patterns is also a technical problem to be solved urgently in the industry.
The microstructure of the existing light guide plate can meet the requirement of an observation visual angle after being specially designed, and display of images with different gray scales is realized, for example, black and white or color display of any pattern is realized, and meanwhile, the fineness and brightness uniformity of the pattern can be improved. However, the conventional light guide plate microstructure is formed by machining or a processing manner of mask exposure. The machining mode is low in machining efficiency, microstructures in multiple directions, different angles and different sizes cannot be machined at one time, the requirement on alignment precision is high, and the process difficulty is high. In the mask exposure processing method, although one gray-scale mask may be processed in advance, when the direction or the size of the microstructure needs to be changed, the mask needs to be processed again, so that the manufacturing period is long and the cost is high.
Disclosure of Invention
Based on this, the present invention aims to provide an improved method for manufacturing a patterned light guide plate, to solve at least one of the above problems.
In a first aspect, the present application provides a method of manufacturing a patterned light guide plate having formed thereon at least one set of micro-structured arrays configured to couple light with incident light in a target direction to display a target pattern;
The method comprises the following steps:
Obtaining a target pattern;
pixelating the target pattern and dividing each pixel in the pixelated target pattern into a plurality of different pixel combinations;
obtaining a microstructure template matched with each pixel combination, and matching a corresponding microstructure template for each pixel in the pixelated target pattern;
And forming a microstructure array image-text according to the microstructure template of each pixel, and forming at least one group of microstructure arrays on the light guide plate according to the microstructure array image-text.
According to the preparation method of the patterned light guide plate, each pixel in the pixelated target pattern is divided into a plurality of different pixel combinations, the microstructure template matched with each pixel combination is obtained, the corresponding microstructure template is matched with each pixel in the pixelated target pattern, the original whole microstructure mask is effectively divided, and when the direction or the size of the microstructure needs to be changed, the change requirement of the microstructure can be met by changing the corresponding microstructure template without reprocessing the whole microstructure mask, so that the flexibility of microstructure preparation is greatly improved, the processing period is shortened, and the preparation cost is reduced.
In one embodiment, the dividing each pixel in the pixelated target pattern into a plurality of different pixel combinations includes obtaining a gray level of each pixel in the pixelated target pattern, dividing each pixel into a plurality of different pixel combinations according to the gray level of each pixel, wherein the different pixel combinations have different gray levels.
In one embodiment, the method comprises the steps of obtaining a microstructure template matched with each pixel combination, determining a first structural parameter of a microstructure corresponding to each pixel combination according to the gray level of each pixel combination, wherein the first structural parameter is configured to enable a light incident surface of the microstructure to reflect a preset amount of incident light, and preparing the microstructure template at least according to the first structural parameter of the microstructure.
In one embodiment, the patterned light guide plate is provided with a pattern area corresponding to each pixel in a pixelated target pattern, the microstructure is formed in the pattern area, and the first structural parameter comprises at least one of the following parameters, namely the area ratio of orthographic projection of the microstructure in the pattern area to the pattern area, the length of the microstructure and a first included angle between a light-facing surface of the microstructure and the target direction.
In one embodiment, the microstructure further has a second structural parameter configured to enable the light-receiving surface of the microstructure to reflect incident light in a target direction to a viewing range of human eyes, wherein the second structural parameter comprises a second included angle between the light-receiving surface of the microstructure and a surface forming the microstructure, the microstructure template is prepared according to at least the first structural parameter of the microstructure, the method comprises determining the second structural parameter of the microstructure, and the microstructure template is prepared according to at least the first structural parameter and the second structural parameter of the microstructure.
In one embodiment, the at least two target patterns are displayed by incident light in different target directions, and the patterned light guide plate is provided with at least two groups of microstructure arrays, wherein the patterned light guide plate is provided with a pattern area corresponding to each pixel in the at least two pixelated target patterns, and at least part of the pattern area is provided with at least two microstructures respectively belonging to different microstructure arrays.
In one embodiment, at least part of the microstructures further have a third structural parameter configured to enable the surface opposite to the light-receiving surface of the microstructure to reflect incident light in other target directions out of the observation range of human eyes, wherein the third structural parameter comprises a third included angle between the surface opposite to the light-receiving surface of the microstructure and the surface forming the microstructure, the microstructure template is prepared according to at least the first structural parameter and the second structural parameter of the microstructure, the microstructure template comprises a third structural parameter of the microstructure in each group of microstructure arrays, and the microstructure template is prepared according to the first structural parameter, the second structural parameter and the third structural parameter of the microstructure.
In one embodiment, the third included angle is greater than the second included angle.
In one embodiment, the micro-structure array graphics context is formed according to the micro-structure templates of the pixels, and comprises the steps of combining the micro-structure templates of the pixels in each pixelated target pattern to form micro-structure array sub graphics context, combining the micro-structure array sub graphics context to form the micro-structure array graphics context, and forming the at least two groups of micro-structure arrays on the light guide plate by utilizing the micro-structure array graphics context.
In one embodiment, the light-receiving surface of the microstructure is any one of a trapezoid plane, an arc surface, a combination of the plane and the arc surface, and the value range of the side length of the pixel in the pixelated target pattern is 100-250 micrometers.
Drawings
In order to more clearly illustrate the embodiments of the present description or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present description, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 shows a flow chart of steps of an embodiment of the present application;
FIG. 2 illustrates target pattern 1 and target pattern 2 and corresponding pixelated patterns in accordance with an embodiment of the present application;
FIG. 3 is a schematic diagram of pixel combinations in a pixelated target pattern according to an embodiment of the application;
FIG. 4 is a schematic diagram of the microstructure of the target pattern 1 according to an embodiment of the application;
FIG. 5 is a schematic diagram of the microstructure of the target pattern 2 according to an embodiment of the present application;
FIG. 6 (a) is a schematic diagram showing a combination of a target pattern 1 and a target pattern 2 according to an embodiment of the present application;
FIG. 6 (b) is a schematic diagram of a microstructure array for a combined pattern according to an embodiment of the present application;
FIG. 7 is a schematic diagram showing a target pattern 1 and a target pattern 2 according to an embodiment of the present application;
fig. 8 shows a target pattern 3 and a target pattern 4 according to an embodiment of the present application;
FIG. 9 (a) illustrates a microstructure array schematic of the target pattern 3 according to an embodiment of the present application;
FIG. 9 (b) illustrates a microstructure array schematic of the target pattern 4 according to an embodiment of the present application;
FIG. 10 (a) is a schematic diagram of a microstructure array showing a combined pattern of a target pattern 3 and a target pattern 4 according to an embodiment of the present application;
fig. 10 (b) is a schematic view showing the target patterns 3 and 4 according to an embodiment of the present application;
FIG. 11 shows a schematic microstructure of a target optically variable pattern 1 according to an embodiment of the present application;
FIG. 12 shows a schematic microstructure of a target optically variable pattern 2 according to an embodiment of the application;
FIG. 13 (a) is a schematic diagram showing the microstructure of an embodiment of the present application at a first viewing angle;
FIG. 13 (b) is a schematic diagram showing the microstructure at a second viewing angle according to an embodiment of the present application;
FIG. 14 shows a schematic microstructure view of a combined pattern of a target light variation pattern 1 and a target light variation pattern 2 according to an embodiment of the present application;
fig. 15 shows a schematic diagram of a microstructure array of a combined pattern of a target light variation pattern 1 and a target light variation pattern 2 according to an embodiment of the present application.
Description of element numbers:
100. a patterned light guide plate 110, a microstructure array 111, a pattern area 200 and a patterned light guide plate;
10. microstructure, 11, light-receiving surface, 12, surface opposite to light-receiving surface, 20, microstructure, 21, light-receiving surface, 22, surface opposite to light-receiving surface, 30, microstructure, 311, pattern area, 40, microstructure, 411, pattern area.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
The embodiment of the application provides a preparation method of a patterned light guide plate, which comprises the steps of dividing a target pattern into a plurality of different pixel combinations, determining a corresponding microstructure template for each pixel combination, and further matching the corresponding microstructure template for each pixel in the target pattern so as to adapt to changeable structural parameters of a microstructure, thereby greatly improving the flexibility of microstructure preparation and reducing the preparation cost while meeting the requirements of an observation view angle and display quality.
As shown in fig. 1, an embodiment of the present application provides a method for manufacturing a patterned light guide plate.
Wherein at least one set of microstructure arrays is formed on the patterned light guide plate, the at least one set of microstructure arrays being configured to couple light with incident light in a target direction to display a target pattern.
Illustratively, when there are multiple target patterns, different target patterns are displayed by incident light in different target directions.
Illustratively, the patterned light guide plate is optically coupled to incident light in one target direction at a time to display the target pattern.
The microstructure may be any of an arc-shaped structure, a linear structure, a curved structure, and a grating structure, for example, wherein the grating structure may be used for display of a color pattern.
The microstructures in the microstructure array may include one light-receiving surface to couple light with incident light in one target direction to provide brightness required for displaying the corresponding target pattern, and may include a plurality of light-receiving surfaces to couple light with incident light in different target directions to provide brightness required for displaying the corresponding target pattern, for example, when the microstructure includes a first light-receiving surface and a second light-receiving surface, the first light-receiving surface may couple light with incident light in the first target direction to provide brightness required for displaying the first target pattern corresponding to the first target direction, and the second light-receiving surface may couple light with incident light in the second target direction to provide brightness required for displaying the second target pattern corresponding to the second target direction. The incident light can be reflected to the observation range of human eyes by the light-facing surface after entering the light-facing surface, and can be reflected to the outside of the observation range of human eyes by the surface opposite to the light-facing surface after entering the surface. Optionally, the light-facing surface of the microstructure is any one of a trapezoid plane, an arc surface, a combination of plane and arc surface. Alternatively, as shown in fig. 4, the microstructure may include a light-facing surface 11 and a surface 12 opposite to the light-facing surface on the opposite side to the light-facing surface, and optionally, as shown in fig. 13 (a), the microstructure may include a first light-facing surface ABED and a second light-facing surface ABC, and a surface ACFD opposite to the first light-facing surface ABED and a surface DEF opposite to the second light-facing surface ABC when the microstructure is a linear structure 30.
Further, the preparation method comprises the following steps:
s100, acquiring a target pattern;
S200, pixelating a target pattern, and dividing each pixel in the pixelated target pattern into a plurality of different pixel combinations;
for example, there may be a plurality of target patterns, as shown in fig. 2 (a) and (b), where the target pattern 1 is pixelated to obtain the fig. 2 (c) and the target pattern 2 is pixelated to obtain the fig. 2 (d). In the pixelated target pattern, the size of each pixel may be determined based on the fineness of the pattern to be presented, and the exemplary range of the edge length of the pixel may be 100 micrometers to 250 micrometers, for example, may be 100 micrometers, 120 micrometers, 140 micrometers, 160 micrometers, 180 micrometers, 200 micrometers, 220 micrometers, and 250 micrometers, and may be specifically determined according to the display requirement of the pattern, so that the fineness of the pattern and the uniformity of the brightness may be improved by making the edge length of the pixel satisfy the above range.
The pixels in the target pattern are arranged according to a certain rule, for example, at least one of orthogonal arrangement, staggered arrangement and interval arrangement.
Illustratively, each pixel may be divided by its gray scale, type, size. For example, pixels of the same gray level may be divided into one group according to the gray level size, or pixels within a predetermined gray level range may be divided into one group according to the gray level range, for example, pixels of the same color (e.g., red/green/blue) may be divided into one group according to the color displayed when the pixels are divided into one group by the type, and pixels of the same length may be divided into one group according to the side length/diagonal length of the pixels when the pixels are divided into one group by the size.
S300, obtaining a microstructure template matched with each pixel combination, and matching the corresponding microstructure template for each pixel in the pixelated target pattern.
The method is characterized in that the method comprises the steps of determining the type of a microstructure template, determining the type of the microstructure template, and matching each pixel in a pixelated target pattern with the corresponding microstructure template on the basis of determining the type of the microstructure template.
S400, forming a microstructure array image-text according to the microstructure template of each pixel, and forming at least one group of microstructure arrays on the light guide plate according to the microstructure array image-text.
The micro-structure templates of each pixel can be combined into micro-structure array graphics context, and the micro-structure array graphics context is taken as a mask to carry out photoetching on the light guide plate, so that a corresponding micro-structure array is finally formed, and the patterned light guide plate is obtained.
According to the preparation method of the patterned light guide plate, each pixel in the pixelated target pattern is divided into a plurality of different pixel combinations, the microstructure template matched with each pixel combination is obtained, the corresponding microstructure template is matched with each pixel in the pixelated target pattern, the original whole microstructure mask is effectively divided, and when the direction or the size of the microstructure needs to be changed, the change requirement of the microstructure can be met by changing the corresponding microstructure template without reprocessing the whole microstructure mask, so that the preparation flexibility of the patterned light guide plate is greatly improved, the processing period is shortened, and the preparation cost is reduced.
In some embodiments of the present application, step S200 may further include:
S210, acquiring gray scales of pixels in a pixelated target pattern;
S220, dividing each pixel into a plurality of different pixel combinations according to the gray scale of each pixel, wherein the different pixel combinations have different gray scales.
For example, as shown in fig. 3, a pixel group 1 may be formed by combining pixels having a first gray level in the target pattern 1, a pixel group 2 may be formed by combining pixels having a second gray level, a pixel group 3 may be formed by combining pixels having a third gray level, and a pixel group 4 may be formed by combining pixels having a fourth gray level, wherein the first gray level, the second gray level, the third gray level, and the fourth gray level are different from each other, and so on, thereby dividing the target pattern 1 into a plurality of different pixel groups. Of course, the target pattern 2 may be divided according to the above manner to obtain a plurality of different pixel combinations, and the different pixel combinations have different gray scales.
In some embodiments of the present application, the microstructure may display gray scales of corresponding pixels when the light-receiving surface is coupled with incident light in a preset direction, so the step S300 may further include:
S310, determining a first structural parameter of a microstructure corresponding to each pixel combination according to the gray scale of each pixel combination, wherein the first structural parameter is configured to enable a light-receiving surface of the microstructure to reflect a preset amount of incident light;
s320, preparing a microstructure template at least according to the first structural parameters of the microstructure.
Wherein the first structural parameter is configured to cause the microstructure to reflect a predetermined amount of incident light. For example, the first structural parameters such as density (area ratio), length, angle and the like of the microstructures in different areas on the patterned light guide plate can change the energy of the emergent light, so that different gray scale displays are realized. Therefore, on the basis of determining the gray level of each pixel combination, the first structural parameters such as the density (area ratio), the length, the angle and the like of the microstructure can be designed to enable the microstructure to display the corresponding gray level when being coupled with the incident light in the preset direction, and then the corresponding microstructure template is prepared according to the determined first structural parameters.
Optionally, the patterned light guide plate has a pattern area corresponding to each pixel in the pixelated target pattern, the pattern area having a microstructure formed therein, the first structural parameter comprising at least one of:
(1) The length of the microstructure;
as shown in fig. 4 and 5, the longer the microstructures 10 and 20, the more incident light they reflect, the higher the gray scale displayed, and the brighter the corresponding displayed pattern;
(2) The area ratio of the orthographic projection of the microstructure in the pattern area to the pattern area;
As shown in fig. 6 (b), a microstructure array 110 is formed on the patterned light guide plate 100, and the microstructure array 110 has a plurality of pattern areas 111, and a microstructure 10 and a microstructure 20 are provided in each pattern area 111. The front projection of the microstructure 10 in the pattern area 111 and the pattern area 111 have a certain area ratio, when the first incident light is incident, the larger the area ratio of the microstructure 10 to the pattern area 111 is, the higher the displayed gray scale is, the brighter the corresponding displayed pattern is, and in the same way, the larger the area ratio of the microstructure 20 to the pattern area 111 is, the higher the displayed gray scale is, and the brighter the corresponding displayed pattern is.
(3) A first included angle between the light-facing surface of the microstructure and the incident light direction;
As shown in fig. 11 and fig. 12, the first angles between the light-receiving surface of the microstructure 30 and the incident light direction may be different, that is, the different first angles may enable the microstructure 30 to display different gray scales when the incident light in the preset direction is coupled.
Further, the pattern area is provided with a plurality of microstructures, and the directions of the light facing surfaces of the different microstructures are different. By arranging a plurality of microstructures in the pattern area, different patterns can be displayed in different incident light directions through one patterned light guide plate, and the display performance of the patterned light guide plate is improved. Optionally, the directions of the light facing surfaces of two adjacent microstructures in the pattern area are orthogonal, so that different target patterns can be effectively separated in the light entering direction, and interference among different patterns is further reduced.
Further, the microstructure further has a second structural parameter configured to enable the light-facing surface of the microstructure to reflect the incident light in the target direction to the observation range of the human eye, wherein the second structural parameter includes a second included angle between the light-facing surface of the microstructure and the surface forming the microstructure, so that the step S320 may include:
S321, determining a second structural parameter of the microstructure;
s322, preparing a microstructure template according to at least the first structural parameter and the second structural parameter of the microstructure.
Illustratively, as shown in FIG. 4, the light-facing surface 11 of the microstructure 10 forms a second angle with the surface forming the microstructure 10, wherein the surface forming the microstructure 10 is parallel to the direction of the incident light, and as shown in FIGS. 13 (a) and (b), the first light-facing surface ABED of the microstructure 30 forms a second angle δ with the surface CBEF forming the microstructure 30, and the second light-facing surface ABC of the microstructure 30 forms a second angle α with the surface CBEF forming the microstructure 30. By configuring the proper second structural parameters, the incident light can be reflected to the observation range of human eyes by the light-receiving surface of the microstructure so as to meet the field-of-view observation requirement of human eyes.
The patterned light guide plate is provided with at least two pattern areas corresponding to pixels in the at least two pixelated target patterns, and at least two microstructures respectively belonging to different microstructure arrays are formed in at least part of the pattern areas. Taking fig. 6 as an example, when there are two target patterns, the microstructures 10 and 20 may be disposed in the pattern area where the pixels of the two target patterns overlap, where the microstructures 10 and 20 respectively belong to different microstructure arrays, the microstructures 10 are optically coupled with the incident light in the first target direction to provide the brightness required for displaying the first target pattern, and the microstructures 20 are optically coupled with the incident light in the second target direction to provide the brightness required for displaying the second target pattern.
Further, at least part of the microstructures further have a third structural parameter configured to enable the surface opposite to the light-receiving surface of the microstructure to reflect the incident light in other target directions out of the observation range of human eyes, wherein the third structural parameter includes a third included angle between the surface opposite to the light-receiving surface of the microstructure and the surface forming the microstructure, so that the step S322 may include:
S322A, determining a third structural parameter of the microstructure in each group of microstructure arrays;
S322B, preparing a microstructure template according to the first structural parameter, the second structural parameter and the third structural parameter of the microstructure.
Illustratively, as shown in FIG. 4, the surface 12 of the microstructure 10 opposite to the light-receiving surface 11 forms a third angle with the surface forming the microstructure 10, wherein the surface forming the microstructure 10 is parallel to the direction of the incident light, the surface ACFD of the microstructure 30 opposite to the first light-receiving surface ABED forms a third angle γ with the surface CBEF forming the microstructure 30, and the surface DEF of the microstructure 30 opposite to the second light-receiving surface ABC forms a third angle β with the surface CBEF forming the microstructure 30.
By setting the third structural parameters, the patterned light guide plate can realize the display of different patterns, avoid the mutual interference of different patterns and realize high-quality multi-image display.
Further, the third included angle is larger than the second included angle. As shown in fig. 4, the third angle between the surface 12 opposite to the light-receiving surface 11 and the surface forming the microstructure 10 is larger than the second angle between the light-receiving surface 11 and the surface forming the microstructure 10, and as shown in fig. 13 (a) and (b), γ > δ, β > α. Therefore, the light energy can be fully utilized, the energy utilization rate is improved, the transparency of the patterned light guide plate can be effectively improved, the mutual interference condition among different patterns in the process of displaying a plurality of patterns is reduced, and the overall display effect of the patterned light guide plate is improved.
In some embodiments of the present application, when there are at least two target patterns, step S400 may include:
s410, combining microstructure templates of pixels in each pixelized target pattern to form a microstructure array sub-graph;
s420, combining the sub-graphics and texts of each microstructure array to form a microstructure array graphics and texts;
for example, a "microstructured array pattern" may form a plurality of microstructures in the overlapping pattern areas of the pixels of the target pattern.
S430, forming at least two groups of microstructure arrays on the light guide plate by utilizing the microstructure array graphics context.
By the mode, the preparation efficiency of the patterned light guide plate displayed by multiple pictures can be improved, and the number of templates required for forming different micro-structure arrays is reduced. Of course, the light guide plate may be subjected to photolithography by using each microstructure array sub-pattern instead of the combination.
The inventive concept of the present application will be further elucidated by means of three specific embodiments.
Example 1
Referring to fig. 2 to 6, embodiment 1 provides a method for preparing a patterned light guide plate with two-way double-pattern, which includes the following steps:
and step 1, selecting a target pattern and a light incident direction matched with the target pattern. As shown in fig. 2 (a) and (b), the target pattern includes a target pattern 1 (flower) and a target pattern 2 (squirrel), wherein the light incident direction of the target pattern 1 is from left to right, and the light incident direction of the target pattern 2 is from top to bottom.
And 2, pixelating the target pattern. Fig. 2 (c) and (d) show a pixelated target pattern 1 (flower) and a pixelated target pattern 2 (squirrel), respectively. Wherein, the pixels in the target pattern 1 (flower) and the pixelated target pattern 2 (squirrel) are arranged at an orthogonal interval, and the side length of the pixels is not more than 160 micrometers in order to ensure the fineness and the transmittance of the displayed pattern.
And 3, combining the pixels in the pixelated target pattern 1 according to gray scales, namely combining the pixels with the same gray scale into a pixel combination, wherein the gray scales of different pixel combinations are different. As shown in fig. 3, the target pattern 1 (flower) has at least 4 pixel combinations of different gray levels. Likewise, each pixel in the pixelated target pattern 2 may be divided into a plurality of different gray-scale pixel combinations in gray scale.
And 4, determining the length of the arc-shaped microstructure matched with each pixel combination according to the gray scale of each pixel combination, and preparing a template of the arc-shaped microstructure according to the length. In this embodiment, the first included angle between the light incident surface and the light incident direction of each microstructure is the same. Fig. 4 shows an arc-shaped microstructure (microstructures 1-4) matched with at least part of the pixel combinations in the target pattern 1 (flower), fig. 5 shows an arc-shaped microstructure (microstructures 5-8) matched with at least part of the pixel combinations in the target pattern 2 (squirrel), and a template of a corresponding arc-shaped microstructure can be prepared according to the lengths of the arc-shaped microstructures.
And 5, combining the microstructure templates of the target pattern 1 and the target pattern 2 to form a microstructure array image-text, and photoetching the light guide plate by taking the microstructure array image-text as a mask to form a microstructure array. After each pixel in the pixelated target pattern 1 and each pixel in the pixelated target pattern 2 are combined together as shown in fig. 6 (a), there is an overlap of pixels on a part of the pattern area, so that as shown in fig. 6 (b), for the pattern area where the pixels overlap, two microstructures respectively facing the orthogonal first incident light and the second incident light are provided in the pattern area to realize bidirectional double-view display of the patterned light guide plate 100 (as shown in fig. 7), and correspondingly, the microstructure templates of the target pattern 1 and the target pattern 2 can be correspondingly combined to form the two microstructures in one pattern area by photolithography.
On the other hand, when the patterned light guide plate displays a pattern, only light in one direction is incident at a time, so in order to reduce the mutual interference degree of the two patterns, the third included angle (e.g. 70 °) between the surface 12 of the microstructure 10 opposite to the light-incident surface and the surface forming the microstructure 10 is larger than the second included angle (e.g. 45 °) between the light-incident surface 11 of the microstructure 10 and the surface forming the microstructure 10, and when the second incident light is incident, the second incident light is reflected by the surface 12 opposite to the light-incident surface and then exits from the patterned light guide plate at a larger exit angle without being observed by human eyes.
Example 2
Referring to fig. 8 to 10, embodiment 2 provides a method for manufacturing a patterned light guide plate with two-way double-sided drawings. Embodiment 2 is substantially identical to the procedure of embodiment 1, except that:
The arrangement and the size of the pixels are different. Each pixel in the pixelated target pattern 3 (squirrel) and the pixelated target pattern 4 (flower) is arranged in a staggered manner, and the side length of each pixel is not more than 120 microns. Further, fig. 9 (a) illustrates a microstructure array matching each pixel in the pixelated target pattern 3 (squirrel), and fig. 9 (b) illustrates a microstructure array matching each pixel in the pixelated target pattern 4 (flower). It can be seen that the microstructures in the figures are also correspondingly arranged in a staggered manner. Further, fig. 10 (a) illustrates a microstructure array schematic of a combined pattern of the target pattern 3 (squirrel) and the target pattern 4 (flower). It can be seen that in the pattern areas where the pixels overlap, a plurality of microstructures are also provided, and each pattern area is also arranged correspondingly in a staggered manner.
Fig. 10 (b) illustrates a schematic display diagram of the microstructure array of the combined pattern when the first incident light and the second incident light are incident. It can be seen that the patterned light guide plate 200 of fig. 10 can also achieve a better bidirectional dual-image display effect.
Example 3
Referring to fig. 11 to 15, embodiment 3 provides a method for manufacturing a patterned light guide plate with two-way double-image dimming display. Example 3 is substantially identical to example 1 except that:
(1) The target patterns are different. Specific example 3 the target pattern adopts a target light variation pattern 1 and a target light variation pattern 2. The light variation patterns are expressed in different viewing angles, and the same pattern can display different gray scales.
(2) The arrangement and the size of the pixels are different. Each pixel in the pixelated light variation pattern 1 and the pixelated light variation pattern 2 is orthogonally arranged, and the side length of each pixel is not more than 200 micrometers.
(3) The types of microstructures vary. Embodiment 3 employs a linear microstructure, as shown in fig. 13, the microstructure 30 includes a first light-facing surface ABED and a second light-facing surface ABC, and a surface ACFD opposite to the first light-facing surface ABED and a surface DEF opposite to the second light-facing surface ABC. Wherein, the area ratio of the first light-facing surface ABED to the second light-facing surface ABC is 3-15. The first light-receiving surface ABED has a trapezoid structure, and the second light-receiving surface ABC has a triangle structure. Alternatively, as shown in fig. 14, when the microstructures 30 and 40 are simultaneously formed in one pattern region, the light-incident surface of each microstructure may form an angle with the incident light at that time.
(4) The first structural parameters are different. The first structural parameter of embodiment 3 includes a first angle between the light-incident surface of the microstructures 30 and the incident light direction, and the lengths of the microstructures 30 are the same. As shown in fig. 11, the first included angle between the first light-receiving surface ABED of the microstructure 30 and the incident light direction may be 10 °,30 °, -45 °, -60 ° in order from left to right, and the bright area on the optically variable pattern 1 changes with the left and right movement of the viewing angle, so as to generate an optically variable image effect, and the first included angle between the first light-receiving surface ABED of the microstructure 40 and the incident light direction may be 10 °, 20 °, -30 °, -50 ° in order from left to right, and the bright area on the optically variable pattern 2 changes with the up and down movement of the viewing angle, so as to generate an optically variable image effect.
(5) The second structural parameter and the third structural parameter are different. As shown in fig. 13, the ranges of δ and α are 35 ° to 55 °, for example, δ=45°, and further γ > δ, β > α, and γ and β are each 35 ° to 90 °, for example, γ=80°. When the patterned light guide plate displays the optically variable pattern 2, if the microstructure 30 is formed in the non-overlapping pixel region, the second incident light is incident on the surface ACFD opposite to the first light-receiving surface ABED and/or the surface DEF opposite to the second light-receiving surface ABC, and the second incident light can exit from the patterned light guide plate at a larger angle to the outside of the observation range of the human eye, so as to reduce the display interference of different patterns.
Fig. 15 shows a schematic view of a microstructure array of a combined pattern of the target light-variable pattern 1 and the target light-variable pattern 2, by which a preferable light-variable display effect of a bidirectional double-view can be achieved when the first incident light and the second incident light are respectively incident.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A method of making a patterned light guide plate, the patterned light guide plate having at least one set of microstructure arrays formed thereon, the at least one set of microstructure arrays configured to couple light incident in a target direction to display a target pattern;
The method comprises the following steps:
Obtaining a target pattern;
pixelating the target pattern and dividing each pixel in the pixelated target pattern into a plurality of different pixel combinations;
obtaining a microstructure template matched with each pixel combination, and matching a corresponding microstructure template for each pixel in the pixelated target pattern;
And forming a microstructure array image-text according to the microstructure template of each pixel, and forming at least one group of microstructure arrays on the light guide plate according to the microstructure array image-text.
2. The method of claim 1, wherein dividing each pixel in the pixelated target pattern into a plurality of different pixel combinations comprises:
Acquiring gray scales of pixels in a pixelated target pattern;
each pixel is divided into a plurality of different pixel combinations according to the gray scale of each pixel, wherein the different pixel combinations have different gray scales.
3. The method of preparing according to claim 2, wherein the obtaining a microstructure template matched to each pixel combination comprises:
Determining a first structural parameter of a microstructure corresponding to each pixel combination according to the gray scale of each pixel combination, wherein the first structural parameter is configured to enable a light-incident surface of the microstructure to reflect a preset amount of incident light;
The microstructure template is prepared according to at least a first structural parameter of the microstructure.
4. The method of manufacturing according to claim 3, wherein the patterned light guide plate has a pattern region corresponding to each pixel in a pixelated target pattern, the pattern region having the microstructure formed therein;
the first structural parameter includes at least one of the following parameters:
The area ratio of the orthographic projection of the microstructure on the pattern area to the pattern area;
the length of the microstructure;
And a first included angle between the light-facing surface of the microstructure and the target direction.
5. The method of claim 3, wherein the microstructure further has a second structural parameter configured to cause a light-receiving surface of the microstructure to reflect incident light in a target direction into an observation range of a human eye, wherein the second structural parameter includes a second angle between the light-receiving surface of the microstructure and a surface forming the microstructure;
The preparing the microstructure template according to at least a first structural parameter of the microstructure comprises:
determining a second structural parameter of the microstructure;
the microstructure template is prepared according to at least a first structural parameter and a second structural parameter of the microstructure.
6. The method according to claim 5, wherein,
At least two target patterns are arranged, and different target patterns are displayed through incident light in different target directions;
At least two groups of microstructure arrays are formed on the patterned light guide plate, wherein the patterned light guide plate is provided with a pattern area corresponding to each pixel in at least two pixelated target patterns, and at least two microstructures respectively belonging to different microstructure arrays are formed in at least part of the pattern area.
7. The method according to claim 6, wherein,
At least a portion of the microstructures also have a third structural parameter configured to cause a face of the microstructure opposite the light-receiving face to reflect incident light in other target directions out of the viewing range of a human eye, wherein the third structural parameter includes a third included angle of the face of the microstructure opposite the light-receiving face and a surface forming the microstructure;
The preparing the microstructure template according to at least the first structural parameter and the second structural parameter of the microstructure comprises the following steps:
determining a third structural parameter of the microstructures in each set of microstructure arrays;
And preparing the microstructure template according to the first structural parameter, the second structural parameter and the third structural parameter of the microstructure.
8. The method of claim 7, wherein the third included angle is greater than the second included angle.
9. The method of claim 6, wherein the forming the micro-structured array pattern from the micro-structured templates of each pixel comprises:
Combining the microstructure templates of the pixels in each pixelized target pattern to form a microstructure array sub-graph;
combining the microstructure array sub-graphics and texts to form the microstructure array graphics and texts;
and forming at least two groups of microstructure arrays on the light guide plate by utilizing the microstructure array graphics context.
10. The method according to any one of claims 1 to 9, wherein the light-facing surface of the microstructure is any one of a trapezoid plane, an arc surface, a combination of the plane and the arc surface, and the value range of the side length of the pixel in the pixelated target pattern is 100 micrometers to 250 micrometers.
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| CN202311816295.5A CN120215006A (en) | 2023-12-27 | 2023-12-27 | Method for preparing patterned light guide plate |
| PCT/CN2024/142237 WO2025140293A1 (en) | 2023-12-27 | 2024-12-25 | Preparation method for patterned light guide plate |
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| CN202311816295.5A CN120215006A (en) | 2023-12-27 | 2023-12-27 | Method for preparing patterned light guide plate |
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| CN102418302B (en) * | 2011-10-21 | 2013-10-09 | 苏州大学 | An Optical Invisible Watermark Security Paper |
| CN104460115B (en) * | 2014-12-31 | 2017-09-01 | 苏州大学 | A multi-view pixel pointing type backlight module and naked-eye 3D display device |
| CN105372824B (en) * | 2015-12-22 | 2017-12-29 | 苏州苏大维格光电科技股份有限公司 | A kind of bore hole 3D laser display apparatus |
| WO2017214481A1 (en) * | 2016-06-10 | 2017-12-14 | Corning Incorporated | Microstructured and patterned light guide plates and devices comprising the same |
| CN108287388A (en) * | 2018-02-23 | 2018-07-17 | 京东方科技集团股份有限公司 | Light guide plate, backlight module, display device and its driving method |
| CN215867196U (en) * | 2021-06-22 | 2022-02-18 | 吴丽莹 | Light guide plate with blast function |
| CN215375842U (en) * | 2021-06-22 | 2021-12-31 | 吴丽莹 | Graphical light guide plate |
| CN114217374B (en) * | 2021-09-30 | 2022-10-18 | 东莞市元立电子科技有限公司 | Light guide plate for improving brightness |
| CN121171101A (en) * | 2022-06-29 | 2025-12-19 | 中国印钞造币集团有限公司 | Patterned optical anti-counterfeiting structures and their manufacturing methods and coins |
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