Glass light guide plate lattice point manufacturing method, glass light guide plate and front light source assembly

Abstract

The invention discloses a method for manufacturing lattice points of a glass light guide plate. The method comprises the following steps: (1) screen-printing ink on a first surface of a glass plate to obtain an ink layer; (2) punching on the first surface with the ink layer of the glass plate by using laser to obtain a plurality of first blind holes; (3) an ink layer on the surface of the glass plate is removed, then the glass plate is put into pure water to be cleaned, and glass powder and ink residues in the first blind holes are removed; and (4) etching the cleaned glass plate in a hydrofluoric acid solution to obtain a plurality of sunken lattice points. Since the ink layer can absorb part of energy of the laser, the central area with the maximum energy density in the laser spots can penetrate through the ink layer to form the concave holes in the first surface of the glass plate, so that the finally obtained concave lattice points are small in size, the lattice points cannot be directly seen by human eyes, a displayed picture is clearer, and the display effect is better. And the display light and shade contrast can be improved. The invention further discloses a glass light guide plate and a front light source assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of reflective liquid crystal display, and in particular to a new method for manufacturing glass light guide plate dots, a glass light guide plate and a front light source assembly. Background Art

[0002] Reflective liquid crystal display (R-LCD) is a kind of display that relies on the metal reflective layer in the liquid crystal panel to reflect ambient light, so it does not need a backlight source, and has great advantages in power consumption and thickness. However, when the ambient light is weak, for example, when there is no sunlight at night or when the indoor lighting brightness is low, the reflective liquid crystal display needs a front light source to provide the light required for display.

[0003] The core component of the front light source is the front light guide plate, which is usually made of polymer optical materials, such as polycarbonate (PC). However, PC materials will turn yellow and bubble under long-term exposure to outdoor sunlight. In order to avoid the above problems, the industry began to use glass materials to make front light guide plates.

[0004] See also Figure 1 As shown, the upper surface of the existing front glass light guide plate 110' is provided with recessed micro-structure dots 111'. When in use, the glass light guide plate 110' is placed above the reflective liquid crystal display 130', and the side of the glass light guide plate 110' is provided with an LED side light source 120'. After the light emitted by the LED enters the glass light guide plate 110', the recessed micro-structure dots 111' will reflect part of the light to the liquid crystal display 130' below for display. This part of the light is marked as L 下 At the same time, part of the light will be refracted upward through the concave microstructure dots 111' and will not participate in the display of the liquid crystal display 130'. This part of the light is marked as L 上 , this part of the light L 上 It will also bring display noise, increase the brightness of black screens, and reduce the display contrast.

[0005] At present, the process for manufacturing the front glass light guide plate is: first, a layer of metal film is coated on the surface of the glass plate, and then a yellow light process is used to make a pattern window on the surface of the metal film, and then the glass plate is placed in a hydrofluoric acid solution to etch the glass surface in the pattern window area, thereby forming glass recessed dots. The disadvantages of the existing recessed dots manufactured using the yellow light process and the hydrofluoric acid etching process are: 1. When the glass in the pattern window area is etched in a hydrofluoric acid solution, the glass plate is etched horizontally by hydrofluoric acid, causing the pattern window size to become larger, and finally resulting in a larger size of the recessed dots, generally greater than 50 microns, and the human eye can directly see the dots, the displayed image is grainy and unclear, and the clarity of the displayed image is reduced. 2. The depth, width, slope, curvature and other morphologies of the recessed microstructure are not easy to control, which ultimately results in different three-dimensional shapes of the recessed microstructure.

[0006] Another existing process for manufacturing a front glass light guide plate is to use a laser to directly punch holes on the glass surface. Although the laser can punch holes with a small diameter and a deep depth on the glass surface, since the laser spot energy distribution is generally a Gaussian distribution, the glass area around the edge of the hole 111' will also be affected by the energy of the laser spot edge, resulting in the edge of the hole 111' becoming a rough surface, making it difficult for the light guide plate 110' to form a smooth dot surface, affecting the display contrast, such as Figure 2 At the same time, direct laser drilling can easily lead to different hole depths, widths, slopes, curvatures, etc., which in turn make the three-dimensional shapes of the holes different. Therefore, it is difficult to make ideal dot morphology by laser drilling. It is very difficult and unattainable to modify the three-dimensional morphology of dots by laser energy.

[0007] Therefore, it is necessary to provide a new method for manufacturing dots of a glass light guide plate to reduce the size of the recessed microstructure dots and obtain a better dot morphology, thereby solving the above-mentioned problems. Summary of the invention

[0008] An object of the present invention is to provide a new method for manufacturing dots of a glass light guide plate, so as to reduce the size of the dots of a recessed microstructure and obtain a better dot morphology.

[0009] Another object of the present invention is to provide a glass light guide plate having smaller-sized recessed microstructure dots and better dot morphology.

[0010] Another object of the present invention is to provide a front light source assembly having a glass light guide plate with smaller-sized recessed microstructure dots and better dot morphology.

[0011] To achieve the above object, the technical solution of the present invention is to provide a method for manufacturing dots of a glass light guide plate, which comprises the following steps:

[0012] (1) providing a glass plate, and silk-screening ink on a first surface of the glass plate to obtain an ink layer;

[0013] (2) placing the glass plate having the ink layer below a laser generator, and drilling holes on the first surface of the glass plate using a laser, thereby obtaining a plurality of first blind holes;

[0014] (3) removing the ink layer on the surface of the glass plate, and then washing the glass plate in pure water to remove glass powder and ink residue in the first blind hole;

[0015] (4) placing the cleaned glass plate into a hydrofluoric acid solution for etching, and etching the inner sidewalls of each of the first blind holes to obtain a plurality of recessed dots.

[0016] Preferably, the aperture of the first blind hole gradually decreases from the top to the bottom, thereby forming a structure that is larger at the top and smaller at the bottom, so as to ensure the shape of the recessed dots obtained by subsequent etching.

[0017] Preferably, the inner side wall of the first blind hole is inclined and the inner side wall of the first blind hole is in an upward expansion state as a whole, and in a cross section perpendicular to the first surface of the glass plate, the slope angle of the inner side wall of the first blind hole is greater than 55 degrees.

[0018] Preferably, the bottom surface of the first blind hole is flat, the inner side wall of the first blind hole is inclined upward and expanded compared to the bottom surface, and in a cross section perpendicular to the first surface of the glass plate, the slope angle of the inner side wall of the first blind hole is greater than 55 degrees.

[0019] Preferably, the first blind hole is conical, and in a cross section perpendicular to the first surface of the glass plate, a slope angle of an inner side wall of the first blind hole is greater than 55 degrees.

[0020] Preferably, the maximum aperture of the first blind hole is less than 20 microns, and the depth of the first blind hole is greater than 10 microns, so that the first blind hole has a smaller size to ensure that the overall size of the recessed dots obtained by subsequent etching is smaller, and the dots cannot be directly seen by the naked eye during use, thereby improving the clarity of the displayed image.

[0021] Preferably, the aperture of the recessed dots gradually decreases from the top to the bottom.

[0022] Preferably, the diameter of the sunken dots is greater than the diameter of the first blind hole, and the depth of the sunken dots is the same as the depth of the first blind hole.

[0023] Preferably, the maximum aperture of the sunken dots is less than or equal to 30 microns, and the depth of the sunken dots is greater than 10 microns. Therefore, the size of the sunken dots is much smaller than the dot size greater than 50 microns in the prior art, and the dots cannot be directly seen by the naked eye during use, thereby improving the clarity of the displayed image.

[0024] Preferably, the inner sidewalls of the recessed dots are inclined and are in an upwardly expanding state as a whole. In a cross section perpendicular to the first surface of the glass plate, the slope angle of the inner sidewalls of the recessed dots is between 41 degrees and 47 degrees.

[0025] Preferably, the bottom surface of the recessed dots is flat, the inner side walls of the recessed dots are inclined upward and expanded compared to the bottom surface, and in a cross section perpendicular to the first surface of the glass plate, the slope angle of the inner side walls of the recessed dots is between 41 degrees and 47 degrees. The shape of the recessed dots and the slope angle design of their inner side walls enable the light entering the glass light guide plate to be reflected by the recessed dots, thereby increasing the proportion of light emitted to the second surface of the glass plate and reducing the proportion of light emitted to the first surface of the glass plate, thereby improving the displayed light and dark contrast.

[0026] Preferably, the recessed dots are conical in shape, and in a cross section perpendicular to the first surface of the glass plate, a slope angle of an inner side wall of the recessed dots is between 41 degrees and 47 degrees.

[0027] Correspondingly, the present invention also provides a glass light guide plate manufactured using the glass light guide plate dot manufacturing method as described above, wherein the glass light guide plate includes a first surface and a second surface arranged opposite to each other; the first surface is concavely provided with a plurality of recessed dots, and the aperture of each of the recessed dots gradually decreases from the top to the bottom.

[0028] Preferably, the inner side walls of the recessed dots are inclined, and the inner side walls of the recessed dots are in an upwardly expanding state as a whole. In a cross section perpendicular to the first surface of the glass plate, the slope angle of the inner side walls of the recessed dots is between 41 degrees and 47 degrees. The shape of the recessed dots and the slope angle design of their inner side walls enable the light entering the glass light guide plate to be reflected by the recessed dots, thereby increasing the proportion of light emitted to the second surface of the glass plate and reducing the proportion of light emitted to the first surface of the glass plate, thereby improving the displayed light and dark contrast.

[0029] Preferably, the bottom surface of the recessed dots is flat, and the inner sidewalls of the recessed dots are inclined upward and expanded compared to the bottom surface.

[0030] Preferably, the recessed dots are conical in shape.

[0031] Correspondingly, the present invention also provides a front light source assembly, which includes a side light source and the glass light guide plate as described above, wherein the side light source is arranged at one end of the glass light guide plate, and after the light emitted by the side light source enters the glass light guide plate, the light entering each of the recessed grid points is reflected and partially emitted through the first surface of the glass plate, and partially emitted through the second surface of the glass plate.

[0032] Compared with the prior art, the method for manufacturing dots of a glass light guide plate of the present invention first screen prints an ink layer on the first surface of the glass plate, and then uses a laser to punch holes on the first surface of the glass plate on the ink layer to obtain a plurality of first blind holes. Firstly, since the ink layer absorbs part of the energy of the laser, only the central area with the highest energy density in the laser spot can penetrate the ink layer to form a concave hole on the first surface of the glass plate, thereby preventing the edge area of ​​the first blind hole from being affected by the edge energy of the laser spot and becoming a rough surface, and finally, after etching to form the concave dots, the first surface can form a smooth dot surface; secondly, since the energy of the laser spot is concentrated, it is easier to control the depth, width, slope, curvature, etc. of the first blind hole during the punching process, so that the first blind hole has a regular three-dimensional morphology, thereby ensuring that the concave dots obtained by subsequent chemical etching are in a frustum shape and have a regular three-dimensional morphology. The concave dots of this shape can reflect more light to the bottom of the second surface, reduce the light refracted from the first surface, and thus improve the contrast between light and dark in the display; in addition, in the aforementioned punching process, since the energy of the laser spot is concentrated, the size of the first blind hole can be controlled within a very small range, thereby greatly reducing the size of the concave dots obtained by subsequent chemical etching compared with the size of the arc dots in the prior art, so that the dots cannot be directly seen by the human eye, making the display clearer.

[0033] Correspondingly, the glass light guide plate obtained by the glass light guide plate dot manufacturing method of the present invention and the front light source assembly having the glass light guide plate both have the above-mentioned technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the reflection principle of the glass light guide plate in the prior art.

[0035] Figure 2 It is a schematic diagram of the reflection state of a glass light guide plate obtained by directly drilling holes on the glass surface by laser in the prior art.

[0036] Figure 3 It is a schematic diagram of the state in which a layer of ink is obtained by silk-screen printing on the first surface of the glass plate in the present invention.

[0037] Figure 4 Yes Figure 3 Schematic diagram of the glass plate being laser drilled.

[0038] Figure 5 yes Figure 4 Schematic diagram of the structure of the glass light guide plate obtained after removing a layer of ink from the glass plate.

[0039] Figure 6 It is a schematic diagram of the reflection principle of the glass light guide plate of the present invention.

[0040] Figure 7 It is a partially enlarged schematic diagram of an actual glass light guide plate obtained by the manufacturing method of the present invention.

[0041] Figure 8 It is a partial side view of an actual glass light guide plate obtained by the manufacturing method of the present invention. DETAILED DESCRIPTION

[0042] The embodiments of the present invention are now described with reference to the accompanying drawings, in which similar element numbers represent similar elements. It should be noted that the orientation descriptions involved in the present invention, such as the orientations or positional relationships indicated by up, down, left, right, front, and back, are all based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the technical solutions of the present application or / and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The first, second, etc. described are only used to distinguish technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0043] Combination Figure 3-Figure 6 As shown, the method for manufacturing the dot of the glass light guide plate provided by the present invention is used to manufacture the recessed dot 113 of the microstructure on the glass plate 110', thereby obtaining the glass light guide plate 110. The glass light guide plate 110 is mainly used as the front light guide plate of the reflective liquid crystal display. Of course, the glass light guide plate 110 is not limited to the aforementioned use, and can also be used in other similar optical components that require a higher reflectivity.

[0044] Let's combine Figure 3-Figure 5 As shown, in one embodiment of the present invention, a method for manufacturing dots on a glass light guide plate is provided, comprising the following steps:

[0045] S01, providing a glass plate 110', and screen-printing ink on a first surface of the glass plate 110' to obtain an ink layer 120';

[0046] See also Figure 3As shown, in this embodiment, the glass plate 110' has a first surface 111 and a second surface 112 opposite to each other, and the ink layer 120' is not limited to being obtained by silk-screen printing on the first surface 111, and can also be obtained by silk-screen printing on the second surface 112. Preferably, the thickness of the ink layer 120' is between 10 microns and 30 microns. Of course, the thickness of the ink layer 120' is not limited to that in this embodiment, and can be adaptively adjusted according to the energy of the laser used for processing.

[0047] In this embodiment, a glass plate 110' is used as the base material for forming a light guide plate. The glass plate 110' will not produce problems such as yellowing and bubbling under long-term exposure to outdoor sunlight. Therefore, it can effectively solve the problems of yellowing and bubbling existing in the existing light guide plates using polymer optical materials.

[0048] S02, placing the glass plate 110' with the ink layer 120' below a laser generator, and using a laser to drill holes on the first surface 111 of the glass plate 110', thereby obtaining a plurality of first blind holes 113';

[0049] See also Figure 4 As shown, in this embodiment, the ink layer 120' of the glass plate 110' is directly placed under the laser generator 200. Since the ink layer 120' absorbs part of the energy of the laser, only the central area of ​​the laser spot can penetrate the ink layer 120' and form a concave hole on the first surface 111 of the glass plate 110'. In other words, only the area with the highest energy density in the center of the laser spot can penetrate the ink layer 120', and the area with a lower energy density at the edge of the laser spot cannot penetrate the ink layer 120'. Thus, through the filtering of the ink layer 120', the laser spot can only punch holes in a smaller area of ​​the first surface 111 of the glass plate 110'. Firstly, the inner diameter of the obtained first blind hole 113' can be made very small. Secondly, since the energy of the laser spot is concentrated, the edge area of ​​the first blind hole 113' can be prevented from being affected by the edge energy of the laser spot and becoming a rough surface. Thus, the depth, width, slope, curvature, etc. of the first blind hole 113 ′ can be better controlled, so that the first blind hole 113 ′ has a regular three-dimensional shape, which is convenient for forming and controlling the recessed dots 113 .

[0050] Continue to view Figure 4As shown, in this embodiment, the power and wavelength of the laser are selected to ensure that the first blind hole 113' has a smaller size. For example, a laser generator 200 with a power of 3 watts and a wavelength of 355 nm is selected to process the first surface 111, so that the maximum aperture d' of the first blind hole 113' is less than 20 microns, and the depth h' of the first blind hole 113' is greater than 10 microns. For example, the depth h' of the first blind hole 113' is processed to 15 microns. Compared with the size of the concave dots greater than 50 microns in the prior art, the size of the first blind hole 113' in the present application is much smaller than the size of the concave dots in the prior art, thereby ensuring that the overall size of the concave dots 113 obtained by subsequent etching is reduced to obtain the concave dots 113 with an extremely fine structure. When the glass light guide plate 110 with the concave dots 113 with the extremely fine structure is applied to a reflective liquid crystal display, the dots cannot be directly seen by the naked eye, thereby improving the clarity of the displayed image.

[0051] See again Figure 4 As shown, in this embodiment, the aperture of the first blind hole 113' gradually decreases from its top to its bottom. That is, the first blind hole 113' forms a structure that is larger at the top and smaller at the bottom, and the aperture at its opening position is larger than the aperture at its bottom. Moreover, the aperture d' at the opening position is less than 20 microns. This shape setting of the first blind hole 113' can ensure that the recessed dots 113 obtained by subsequent etching also have a structure that is larger at the top and smaller at the bottom. Different from the arc-shaped recesses in the prior art, the special shape of the recessed dots 113 in the present application can increase the proportion of light reflected downward, thereby improving the light-dark contrast of the display, as described later.

[0052] In a specific embodiment, the first blind hole 113' is in the shape of a frustum. The bottom surface 1131' of the first blind hole 113' is a plane, the inner side wall 1132' of the first blind hole 113' is inclined upward compared to the bottom surface 1131', and the inner side wall 1132' of the first blind hole 113' is in an upward expansion state as a whole, that is, the inner side wall 1132' of the first blind hole 113' is inclined upward and has a certain slope. In a cross section perpendicular to the first surface 111 of the glass plate 110', there is an acute angle a' between the inner side wall 1132' of the first blind hole 113' and the plane where the bottom surface 1131' is located, that is, the slope angle of the inner side wall 1132' of the first blind hole 113' is a'. In this specific embodiment, the angle a' is greater than 55 degrees. Of course, in other embodiments, the angle of the angle a' can be flexibly adjusted as needed.

[0053] It should be noted that the first blind hole 113' is not limited to being in a frustum shape, and it is also feasible to directly process it into a conical shape. For the conical first blind hole 113', its inner side wall 1132' is in an inclined upward expansion state, and it is sufficient to ensure that the depth h' of the first blind hole 113' is greater than 10 microns and the slope angle a' of the inner side wall 1132' is greater than 55 degrees.

[0054] S03, removing the ink layer 120' on the surface of the glass plate 110', and then placing the glass plate 110' in pure water for cleaning to remove glass powder and ink residue in the first blind hole 113';

[0055] In this embodiment, the method of removing the ink layer 120' is a conventional method in the art and will not be described in detail.

[0056] S04, placing the cleaned glass plate 110' into a hydrofluoric acid solution for etching, and etching the inner sidewalls 1132' of each of the first blind holes 113' to obtain a plurality of recessed dots 113.

[0057] See also Figure 4-5 As shown, in this embodiment, the aperture of the recessed dot 113 gradually decreases from its top to its bottom. That is, the recessed dot 113 forms a structure that is larger at the top and smaller at the bottom, and the aperture d at its opening position is larger than the aperture at its bottom. Since the recessed dot 113 is obtained by chemical etching on the basis of the first blind hole 113', the aperture of the recessed dot 113 is slightly larger than the aperture of the first blind hole 113', and the maximum aperture of the recessed dot 113 is preferably less than or equal to 30 microns, and the depth h of the recessed dot 113 is determined by the depth h' of the first blind hole 113', that is, the depth h of the recessed dot 113 is the same as the depth h' of the first blind hole 113'. In addition, since the depth and width of the first blind hole 113' are determined during laser drilling in the aforementioned step, the final size and morphology of the recessed dot 113 can be controlled by controlling the concentration of the hydrofluoric acid solution and the etching time in this step.

[0058] Continue to view Figure 5As shown, in this embodiment, the recessed dots 113 are preferably in the shape of a truncated cone. Specifically, the bottom surface 11331 of the recessed dots 113 is flat, the inner side wall 1132 of the recessed dots 113 is inclined upward compared to the bottom surface 11331, and the inner side wall 1132 of the recessed dots 113 is in an upward expansion state as a whole, that is, the inner side wall 1132 of the recessed dots 113 is inclined upward and has a certain slope. In a cross section perpendicular to the first surface 111 of the glass plate 110', there is an acute angle a between the inner side wall 1132 of the recessed dots 113 and the plane where the bottom surface 11331 is located, that is, the slope angle of the inner side wall 1132 of the recessed dots 113 is a. In this embodiment, the angle a is between 41° and 47°. The recessed dots 113 are configured in a cone-shaped structure, which is different from the arc-shaped recesses in the prior art. Moreover, the slope angle a of the inner side wall 1132 of the recessed dots 113 is configured so that after the light entering the glass light guide plate 110 is reflected by the recessed dots 113, most of the light is reflected and emitted toward the second surface 112 of the glass light guide plate 110, and a small part is emitted toward the first surface 111 of the glass light guide plate 110, thereby increasing the proportion of light emitted toward the second surface 112 of the glass light guide plate 110 and reducing the proportion of light emitted toward the first surface 111 of the glass light guide plate 110, thereby improving the displayed light and dark contrast.

[0059] like Figure 5 As shown, in a specific embodiment of the present application, the depth h of the recessed dots 113 is preferably 15 microns, and the maximum width d of the recessed dots 113 is preferably 30 microns, that is, the diameter d of the opening position of the recessed dots 113 is preferably 30 microns, and the slope angle a of the inner side wall 1132 of the recessed dots 113 is preferably 45 degrees. The size of the recessed dots 113 is much smaller than the size of the recessed dots greater than 50 microns in the prior art, and the depth, width, slope, curvature, etc. of all the recessed dots 113 can be precisely controlled, so that all the recessed dots 113 have an ideal three-dimensional morphology. When the glass light guide plate 110 with extremely small recessed dots 113 is in use, the dots cannot be directly seen by the naked eye, thereby improving the clarity of the displayed image.

[0060] In the present application, the recessed dots 113 are not limited to being in a frustum shape, and it is also feasible to directly process them into a cone shape. At this time, the inner wall 1132 is also in an inclined upward expansion state, as long as the depth h of the recessed dots 113 is greater than 10 microns and the slope angle a of the inner wall 1132 is between 41° and 47°.

[0061] See again Figure 5As shown, in another embodiment of the present invention, a glass light guide plate 110 is provided, which has a first surface 111 and a second surface 112 arranged opposite to each other. A plurality of recessed dots 113 are recessed on the first surface 111. Of course, the recessed dots 113 are not limited to being arranged on the first surface 111, and it is also feasible to arrange the recessed dots 113 on the second surface 112.

[0062] In this embodiment, the aperture of the recessed dots 113 gradually decreases from the top to the bottom. In other words, the recessed dots 113 form a structure that is larger at the top and smaller at the bottom, and the aperture d at the opening position is larger than the aperture at the bottom. Since the forming method of the recessed dots 113 is as described above, it will not be described again. Since the depth and width of the first blind hole 113' are first determined by laser drilling during the manufacturing process, and then the concentration of the hydrofluoric acid solution and the etching time are controlled, the final size and morphology of the recessed dots 113 can be controlled.

[0063] Continue to view Figure 5 As shown, in this embodiment, the recessed dots 113 are preferably in the shape of a truncated cone. Specifically, the bottom surface 11331 of the recessed dots 113 is a plane, the inner sidewall 1132 of the recessed dots 113 is inclined upward compared to the bottom surface 11331, and the inner sidewall 1132 of the recessed dots 113 is in an upward expansion state as a whole, that is, the inner sidewall 1132 of the recessed dots 113 is inclined upward and has a certain slope. In a cross section perpendicular to the first surface 111 of the glass plate 110', there is an acute angle a between the inner sidewall 1132 of the recessed dots 113 and the plane where the bottom surface 11331 is located, that is, the slope angle of the inner sidewall 1132 of the recessed dots 113 is a.

[0064] In this embodiment, the angle a is between 41° and 47°. The recessed dots 113 are arranged in a frustum-shaped structure, which is different from the arc-shaped recess in the prior art. Furthermore, the angle design of the slope angle a of the inner side wall 1132 of the recessed dots 113 makes it possible for the light entering the glass light guide plate 110 to be reflected by the recessed dots 113, and most of it is reflected and emitted toward the second surface 112 of the glass light guide plate 110, and a small part is emitted toward the first surface 111 of the glass light guide plate 110, thereby increasing the proportion of light emitted toward the second surface 112 of the glass light guide plate 110, and reducing the proportion of light emitted toward the first surface 111 of the glass light guide plate 110, thereby improving the contrast between light and dark displayed.

[0065] Continue to view Figure 5As shown, in a specific embodiment of the present application, the depth h of the recessed dots 113 is preferably 15 microns, and the maximum width d of the recessed dots 113 is preferably 30 microns, that is, the diameter d of the opening position of the recessed dots 113 is preferably 30 microns, and the slope angle a of the inner side wall 1132 of the recessed dots 113 is preferably 45 degrees. The size of the recessed dots 113 in the present application is much smaller than the size of the recessed dots greater than 50 microns in the prior art, and the depth, width, slope, curvature, etc. of all the recessed dots 113 can be precisely controlled, so that all the recessed dots 113 have an ideal three-dimensional morphology. When the glass light guide plate 110 with extremely small recessed dots 113 is in use, the dots cannot be directly seen by the naked eye, thereby improving the clarity of the displayed image.

[0066] It is understandable that the recessed dots 113 are not limited to being in the shape of a truncated cone. They can be set to be in a cone or other shapes. As long as the depth h of the recessed dots 113 is greater than 10 microns and the slope angle a of the inner wall 1132 is between 41° and 47°, the above-mentioned effect can also be achieved.

[0067] In this embodiment, the recessed dots 113 are manufactured using the above-mentioned method for manufacturing dots of a glass light guide plate, and thus the description thereof will not be repeated.

[0068] Combination Figure 5-6 As shown, when the glass light guide plate 110 in the present application is used, the glass light guide plate 110 is arranged in front of a reflective liquid crystal display (not shown), so that the second surface 112 of the glass light guide plate 110 is adjacent to the reflective liquid crystal display, and the first surface 111 having the recessed dots 113 is located on the side away from the reflective liquid crystal display. The side of the glass light guide plate 110 is provided with an LED side light source 120. After the light emitted by the LED side light source 120 enters the glass light guide plate 110, the recessed dots 113 will reflect part of the light to the liquid crystal display below for display, that is, Figure 6 L shown in 下 , part of the light will be refracted upwards through the recessed dots 113 and will not participate in the display of the liquid crystal display, that is, Figure 6 L shown in 上 In the present application, since the slope angle a of the inner side wall 1132 of the recessed dots 113 is designed to be between 41° and 47°, the light entering the glass light guide plate 110 can be reflected by the recessed dots 113, and the proportion of the light emitted to the second surface 112 can be increased, while the proportion of the light emitted to the first surface 111 can be reduced, thereby improving the light-dark contrast of the display.

[0069] Recombination Figure 5-6As shown, in another embodiment of the present invention, a front light source assembly 100 is also provided, which includes an LED side light source 120 and the glass light guide plate 110 as described above, and the LED side light source 120 is arranged at one end of the glass light guide plate 110. After the light emitted by the side light source 120 enters the glass light guide plate 110, the light entering each recessed grid point 113 is partially reflected and emitted to the first surface 111, and does not participate in the display of the liquid crystal display, and most of it is emitted to the second surface 112, and is used for the display of the liquid crystal display. In addition, the proportion of light emitted to the second surface 112 is much greater than the proportion of light emitted to the first surface 111.

[0070] In summary, according to the method for manufacturing dots of a glass light guide plate of the present invention, a layer of ink 120' is firstly silk-screened on the first surface 111 of the glass plate 110', and then the first surface 111 of the glass plate 110' is punched with a laser on the ink layer 120' to obtain a plurality of first blind holes 113'. In this process, since the ink layer 120' absorbs part of the energy of the laser, only the central area with the highest energy density in the laser spot can penetrate the ink layer 120' to form concave holes on the first surface 111 of the glass plate 110', thereby preventing the edge areas of the first blind holes 113' from being affected by the edge energy of the laser spot and becoming a rough surface, and finally after etching to form the concave dots 113, the first surface 111 can form a smooth dot surface; secondly, since the energy of the laser spot is concentrated, the depth, width, slope, curvature, etc. of the first blind holes 113' are easier to control during the punching process, so that the first blind holes 113' have regular three-dimensional shapes. The concave dots 113 obtained by subsequent chemical etching are in the shape of a cone and have a regular three-dimensional morphology. The concave dots 113 of this shape can reflect more light to the bottom of the second surface 112, reduce the light refracted from the first surface 111, and thus improve the displayed light and dark contrast; in addition, in the aforementioned punching process, the energy of the laser spot is concentrated, so that the size of the first blind hole 113' can be controlled within a very small range, thereby greatly reducing the size of the concave dots 113 obtained by subsequent chemical etching compared to the size of the arc dots in the prior art, so that the dots cannot be directly seen by the human eye, making the displayed image clearer.

[0071] Correspondingly, the glass light guide plate 110 obtained by the method for manufacturing the glass light guide plate dots of the present invention and the front light source assembly 100 having the glass light guide plate 110 both have the above-mentioned technical effects.

[0072] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A method for manufacturing dots of a glass light guide plate, characterized in that: The steps include: (1) providing a glass plate, and silk-screening ink on a first surface of the glass plate to obtain an ink layer; (2) placing the glass plate having the ink layer below a laser generator, and drilling holes on the first surface of the glass plate using a laser, thereby obtaining a plurality of first blind holes; (3) removing the ink layer on the surface of the glass plate, and then washing the glass plate in pure water to remove glass powder and ink residue in the first blind hole; (4) placing the cleaned glass plate into a hydrofluoric acid solution for etching, and etching the inner sidewalls of each of the first blind holes to obtain a plurality of recessed dots.

2. The method for manufacturing dots of a glass light guide plate according to claim 1, characterized in that: The aperture of the first blind hole gradually decreases from the top to the bottom.

3. The method for manufacturing dots of a glass light guide plate according to claim 1, characterized in that: The inner side wall of the first blind hole is inclined and is in an upward expansion state as a whole. In a cross section perpendicular to the first surface of the glass plate, the slope angle of the inner side wall of the first blind hole is greater than 55 degrees.

4. The method for manufacturing dots of a glass light guide plate according to claim 1, wherein: The maximum aperture of the first blind hole is less than 20 micrometers, and the depth of the first blind hole is greater than 10 micrometers.

5. The method for manufacturing dots of a glass light guide plate according to any one of claims 1 to 4, characterized in that: The aperture of the recessed dots gradually decreases from the top to the bottom.

6. The method for manufacturing dots of a glass light guide plate according to any one of claims 1 to 4, characterized in that: The maximum aperture of the recessed dots is less than or equal to 30 micrometers, and the depth of the recessed dots is the same as the depth of the first blind hole.

7. The method for manufacturing dots of a glass light guide plate according to any one of claims 1 to 4, characterized in that: The inner sidewall of the recessed dots is inclined and is in an upward expansion state as a whole. In a cross section perpendicular to the first surface of the glass plate, the slope angle of the inner sidewall of the recessed dots is between 41 degrees and 47 degrees.

8. A glass light guide plate manufactured by the method for manufacturing glass light guide plate dots according to any one of claims 1 to 7, characterized in that: The glass light guide plate comprises a first surface and a second surface which are arranged opposite to each other; a plurality of recessed dots are recessed on the first surface, and the aperture of each recessed dot gradually decreases from the top to the bottom.

9. The glass light guide plate according to claim 8, wherein: The inner sidewall of the recessed dots is inclined and is in an upward expansion state as a whole. In a cross section perpendicular to the first surface of the glass plate, the slope angle of the inner sidewall of the recessed dots is between 41 degrees and 47 degrees.

10. A front light source assembly, characterized in that: include: The glass light guide plate according to any one of claims 8 to 9, A side light source is provided at one end of the glass light guide plate. After the light emitted by the side light source enters the glass light guide plate, the light entering each of the recessed dots is reflected and then partially emitted through the first surface of the glass plate and partially emitted through the second surface of the glass plate.

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