Light guide plate, backlight module, display panel, light guide plate mold and manufacturing method therefor

Abstract

A light guide plate (100), a backlight module (200), a display panel (300), a light guide plate mold (400), and a manufacturing method therefor. In a first reflection region (R1) of a reflection surface (S3) of the light guide plate (100), the reflection surface (S3) comprises a plurality of reflection elements (110), each reflection element (110) comprising a first convex surface (111) and a second convex surface (112) protruding in a direction away from a light-emitting surface (S2), and the first convex surface (111) and the second convex surface (112) intersecting with each other; the maximum distance between an edge line (113) where the first convex surface (111) and the second convex surface (112) intersect and the light-emitting surface (S2) is a first distance (D1), and the maximum distance between an edge of the first convex surface (111) away from the second convex surface (112) and the light-emitting surface (S2) is a second distance (D2), the first distance (D1) being greater than the second distance (D2). The light-emitting surface (S2) of the light guide plate (100) comprises a plurality of first protrusions (131), each first protrusion (131) comprising a pair of first sub-protrusions (1311) and a first sub-arc-shaped protrusion (1312), the two first sub-protrusions (1311) being respectively located on two sides of a second hole edge (H2), two ends of the first sub-arc-shaped protrusion (1312) being respectively connected to end portions of the pair of first sub-protrusions (1311) away from a light incidence surface (S1), and the first sub-arc-shaped protrusion (1312) being located on one side of the second hole edge (H2) away from the light incidence surface (S1). Thus, the present application can improve the brightness of areas behind holes.

Description

Light guide plate, backlight module, display panel, light guide plate mold and manufacturing method thereof

[0001] This application claims priority to Chinese Patent Application No. 202411018402.4, filed on July 26, 2024, the disclosure of which is incorporated herein in its entirety by reference as part of the present application. TECHNICAL FIELD

[0002] Embodiments of the present disclosure relate to a light guide plate, a backlight module, a liquid crystal display panel and a light guide plate mold and a manufacturing method thereof. BACKGROUND

[0003] The light guide plate (LGP) in the liquid crystal display panel is a key optical component, which mainly converts linear light sources at the side or bottom into a uniform surface light source to provide uniform backlight for the liquid crystal panel.

[0004] The high screen ratio of the full screen is one of the key technical directions of the development of mobile phones using liquid crystal display (LCD) technology, and is also one of the strong driving agents for catching up with mobile phones using organic light-emitting diode (OLED) technology. The opening in the full screen has an important influence on the full screen. The improvement and optimization of the performance such as the brightness uniformity of the opening area can bring better visual experience to consumers. SUMMARY

[0005] The light guide plate provided by at least one embodiment of the present disclosure comprises a light-in surface, a light-out surface intersecting the light-in surface, and a reflection surface oppositely arranged to the light-out surface, and further comprises an opening, the opening comprises a first hole edge located at the reflection surface, the reflection surface comprises a first reflection area, the first reflection area is located at a side of the first hole edge away from the light-in surface, a projection of the first hole edge on the light-in surface falls within a projection of the first reflection area on the light-in surface, in the first reflection area, the reflection surface comprises a plurality of reflection elements, the reflection elements comprise a first convex surface and a second convex surface protruding away from the light-out surface, the first convex surface and the second convex surface intersect, a maximum distance between a line of intersection of the first convex surface and the second convex surface and the light-out surface is a first distance, a maximum distance between an edge of the first convex surface away from the second convex surface and the light-out surface is a second distance, the first distance is greater than the second distance, and / or the opening further comprises a second hole edge located at the light-out surface, the light-out surface comprises a plurality of protrusions, the plurality of protrusions comprises a plurality of first protrusions, each of the first protrusions comprises a pair of first sub-protrusions and a first sub-arc-shaped protrusion, in a first direction, two first sub-protrusions of the pair of first sub-protrusions are respectively located at two sides of the second hole edge, the pair of first sub-protrusions extends in a second direction, the first direction is parallel to the light-in surface, the second direction is parallel to the light-out surface and perpendicular to the first direction, a virtual line passing through an end of the first sub-protrusion away from the light-in surface and parallel to the first direction passes through the second hole edge, two ends of the first sub-arc-shaped protrusion are respectively connected to ends of the pair of first sub-protrusions away from the light-in surface, the first sub-arc-shaped protrusion is located at a side of the second hole edge away from the light-in surface, and the first sub-arc-shaped protrusions of the plurality of first protrusions are arranged at intervals.

[0006] For example, in the light guide plate provided by an embodiment of the present disclosure, the opening comprises a first hole edge located at the reflection surface, the reflection surface comprises a first reflection area, the first reflection area is located at a side of the first hole edge away from the light-in surface, a projection of the first hole edge on the light-in surface falls within a projection of the first reflection area on the light-in surface, in the first reflection area, the reflection surface comprises a plurality of reflection elements, the reflection elements comprise a first convex surface and a second convex surface protruding away from the light-out surface, the first convex surface and the second convex surface intersect, a maximum distance between a line of intersection of the first convex surface and the second convex surface and the light-out surface is a first distance, a maximum distance between an edge of the first convex surface away from the second convex surface and the light-out surface is a second distance, and the first distance is greater than the second distance.

[0007] For example, in the light guide plate provided by the embodiment of the present disclosure, the plurality of reflecting elements comprises a first reflecting element, the first reflecting element comprises three first convex surfaces and one second convex surface, and the second convex surface intersects with each of the three first convex surfaces.

[0008] For example, in the light guide plate provided by the embodiment of the present disclosure, the gap between the three first convex surfaces in the orthographic projection of the light exit surface overlaps with the orthographic projection of the second convex surface on the light exit surface.

[0009] For example, in the light guide plate provided by the embodiment of the present disclosure, the reflecting surface further comprises a reflecting plane, the first convex surface and the second convex surface are located on one side of the reflecting plane away from the light exit surface, the first convex surface comprises a first edge located on the reflecting plane, the first edge comprises a first circular arc, the second convex surface comprises a plurality of second edges located on the reflecting plane, and the plurality of second edges are approximately located on the same virtual circle.

[0010] For example, in the light guide plate provided by the embodiment of the present disclosure, the virtual circle is equidistant from the center of the orthographic projection of the light exit surface and the center of the orthographic projection of the first edge of the three first convex surfaces on the light exit surface.

[0011] For example, in the light guide plate provided by the embodiment of the present disclosure, the diameter of the virtual circle is less than or equal to the diameter of the first edge.

[0012] For example, in the light guide plate provided by the embodiment of the present disclosure, the plurality of reflecting elements comprises a second reflecting element, the second reflecting element comprises two first convex surfaces and one second convex surface, and the second convex surface intersects with each of the two first convex surfaces.

[0013] For example, in the light guide plate provided by the embodiment of the present disclosure, the gap between the two first convex surfaces in the orthographic projection of the light exit surface overlaps with the orthographic projection of the second convex surface on the light exit surface.

[0014] For example, in the light guide plate provided by the embodiment of the present disclosure, the plurality of reflecting elements comprises a third reflecting element, the third reflecting element comprises one first convex surface and one second convex surface.

[0015] For example, in the light guide plate provided by the embodiment of the present disclosure, the surface roughness of the first convex surface is less than the surface roughness of the second convex surface.

[0016] For example, in the light guide plate provided by the embodiment of the present disclosure, the edge of the first convex surface in the orthographic projection of the light exit surface comprises a second circular arc, and the length of the edge line where the first convex surface intersects with the second convex surface in the orthographic projection of the light exit surface is not greater than 0.9 times the diameter of the second circular arc.

[0017] For example, in the light guide plate provided by an embodiment of the present disclosure, the distance between the edge line where the first convex surface intersects the second convex surface and the center of the orthographic projection of the light exit surface on the second circular arc is not less than 0.6 times the diameter of the second circular arc.

[0018] For example, in the light guide plate provided by an embodiment of the present disclosure, the distance between the centers of the orthographic projections of the second convex surfaces of two adjacent reflective elements on the light exit surface is not less than 2 times the diameter of the second circular arc.

[0019] For example, in the light guide plate provided by an embodiment of the present disclosure, the minimum distance between two adjacent reflective elements is greater than or equal to zero.

[0020] For example, in the light guide plate provided by an embodiment of the present disclosure, in the first reflective region, the reflective surface further comprises reflective dots, the reflective dots comprise third convex surfaces protruding away from the light exit surface, the minimum distance between adjacent reflective dots and reflective elements is greater than or equal to zero, and / or the minimum distance between two adjacent reflective dots is greater than or equal to zero.

[0021] For example, in the light guide plate provided by an embodiment of the present disclosure, the roughness of the first convex surface of the reflective element is substantially equal to the roughness of the third convex surface of the reflective dot.

[0022] For example, in the light guide plate provided by an embodiment of the present disclosure, in the first reflective region, the ratio of the number of second convex surfaces to the sum of the number of first convex surfaces and the number of third convex surfaces is in the range of 1 / 9 to 1 / 3.

[0023] For example, in the light guide plate provided by an embodiment of the present disclosure, the orthographic projection of the edge of the reflective dot on the light exit surface comprises a circle, the orthographic projection of the edge of the first convex surface on the light exit surface comprises a second circular arc, and the diameter of the orthographic projection of the edge of the third convex surface on the light exit surface is equal to the diameter of the orthographic projection of the edge of the first convex surface on the light exit surface.

[0024] For example, in the light guide plate provided by an embodiment of the present disclosure, the reflective surface further comprises a second reflective region surrounding the first reflective region at least partially, in the second reflective region, the reflective surface comprises a plurality of reflective dots, the reflective dots comprise third convex surfaces protruding away from the light exit surface, and the minimum distance between two adjacent third convex surfaces is greater than or equal to zero.

[0025] For example, in the light guide plate provided by the embodiment of the present disclosure, the edge of the first convex surface in the orthographic projection of the light-out surface comprises a second circular arc, the diameter of the second circular arc ranges from 40 μm to 50 μm, and the center distance of the orthographic projection of the second convex surfaces of two adjacent reflecting elements on the light-out surface ranges from 80 μm to 100 μm.

[0026] For example, in the light guide plate provided by the embodiment of the present disclosure, the opening comprises a second hole edge on the light-out surface, the light-out surface comprises a plurality of protrusions, the protrusions protrude away from the reflecting surface, the plurality of protrusions comprises a plurality of first protrusions, each of the first protrusions comprises a pair of first sub-protrusions and a first sub-arc-shaped protrusion, in a first direction, two first sub-protrusions of the pair of first sub-protrusions are respectively located on two sides of the second hole edge, the pair of first sub-protrusions extends in a second direction, a virtual line passing through the second hole edge and parallel to the first direction at the end of the first sub-protrusion away from the light-in surface, two ends of the first sub-arc-shaped protrusion are respectively connected to the ends of the pair of first sub-protrusions away from the light-in surface, the first sub-arc-shaped protrusion is located on the side of the second hole edge away from the light-in surface, and the first sub-arc-shaped protrusions of the plurality of first protrusions are arranged at intervals.

[0027] For example, in the light guide plate provided by the embodiment of the present disclosure, the plurality of first sub-protrusions on the same side of the second hole edge are arranged at equal intervals, and the ratio of the interval between two adjacent first sub-arc-shaped protrusions to the interval between two adjacent first sub-protrusions ranges from 0.25 to 4.

[0028] For example, in the light guide plate provided by the embodiment of the present disclosure, the first sub-arc-shaped protrusion of the first protrusion is tangent to the pair of first sub-protrusions.

[0029] For example, in the light guide plate provided by the embodiment of the present disclosure, in the first direction, the plurality of first sub-protrusions comprises a farthest first sub-protrusion farthest from the second hole edge, and in the first direction, the distance between the farthest first sub-protrusion and the second hole edge ranges from 1 mm to 3 mm.

[0030] For example, in the light guide plate provided by the embodiment of the present disclosure, the light exit surface further comprises a first light exit edge, the first light exit edge is located on the side of the second hole edge away from the light entrance surface, the plurality of protrusions further comprises a plurality of second protrusions, each of the second protrusions comprises a second sub-protrusion and a second sub-arc-shaped protrusion, along the first direction, the second sub-protrusion is located on the side of the first sub-protrusion away from the second hole edge, the end of the second sub-protrusion close to the first light exit edge is closer to the first light exit edge than the end of the first sub-protrusion close to the first light exit edge, one end of the second sub-arc-shaped protrusion is connected to the end of the second sub-protrusion close to the first light exit edge, the other end of the second sub-arc-shaped protrusion is connected to the first light exit edge, and the curvature center of the second sub-arc-shaped protrusion is located on the side of the second sub-arc-shaped protrusion close to the second hole edge, and the second sub-arc-shaped protrusions of the plurality of second protrusions are arranged at intervals.

[0031] For example, in the light guide plate provided by the embodiment of the present disclosure, the second sub-protrusions located on the same side of the second hole edge are arranged at equal intervals, and the ratio of the interval between two adjacent second sub-arc-shaped protrusions to the interval between two adjacent second sub-protrusions is in the range of 0.25-4.

[0032] For example, in the light guide plate provided by the embodiment of the present disclosure, along the first direction and in the direction away from the second hole edge, the interval between the end of the second sub-protrusion close to the first light exit edge and the first light exit edge located on the same side of the second hole edge becomes smaller and smaller.

[0033] For example, in the light guide plate provided by the embodiment of the present disclosure, the second protrusion comprises a second sub-protrusion and a plurality of second sub-arc-shaped protrusions, and the second sub-arc-shaped protrusions located on the same side of the second hole edge are arranged at equal intervals.

[0034] For example, in the light guide plate provided by the embodiment of the present disclosure, along the first direction, the second sub-protrusions located on the same side of the second hole edge comprise a farthest second sub-protrusion farthest from the second hole edge and a nearest second sub-protrusion nearest to the second hole edge, and the distance between the farthest second sub-protrusion and the nearest second sub-protrusion along the first direction is in the range of 0.5mm-5mm.

[0035] For example, in the light guide plate provided by an embodiment of the present disclosure, the plurality of protrusions further include a plurality of third protrusions and a plurality of fourth protrusions, the plurality of third protrusions are located on both sides of the second hole edge along the first direction and on the side of the second sub-protrusion away from the second hole edge, each of the third protrusions extends along the second direction, the plurality of fourth protrusions are located on the side of the second hole edge close to the light-in surface, each of the second protrusions extends along the second direction and intersects with the second hole edge, the first sub-protrusions of the plurality of first protrusions, the second sub-protrusions of the plurality of second protrusions, the plurality of third protrusions and the plurality of fourth protrusions are arranged at equal intervals.

[0036] For example, in the light guide plate provided by an embodiment of the present disclosure, the opening includes a second hole edge of the light-out surface, the light-out surface includes a first light-out edge, the first light-out edge is located on the side of the second hole edge away from the light-in surface, the light-out surface includes a plurality of protrusions, the plurality of protrusions include: a plurality of fifth protrusions extending along the first direction, located on both sides of the second hole edge along the first direction, one end of the fifth protrusion intersects with the second hole edge; a plurality of sixth protrusions extending along the first direction, located on the side of the second hole edge close to the first light-out edge, and not intersecting with the second hole edge; a plurality of seventh protrusions extending along the second direction, located on both sides of the second hole edge along the first direction; and a plurality of eighth protrusions extending along the second direction, located on the side of the second hole edge close to the first light-out edge, one end of the eighth protrusion intersects with the second hole edge, the seventh protrusion intersects with the fifth protrusion and the sixth protrusion, and the eighth protrusion intersects with the sixth protrusion.

[0037] For example, in the light guide plate provided by an embodiment of the present disclosure, the light-out surface further includes a second light-out edge and a third light-out edge, the second light-out edge and the third light-out edge are respectively located on both sides of the second hole edge along the first direction, one end of the fifth protrusion between the second hole edge and the second light-out edge is connected with the second light-out edge, one end of the fifth protrusion between the second hole edge and the third light-out edge is connected with the third light-out edge, and both ends of the sixth protrusion are connected with the second light-out edge and the third light-out edge respectively.

[0038] For example, in the light guide plate provided by the embodiment of the present disclosure, along the second direction, the plurality of fifth protrusions include a farthest fifth protrusion farthest from the first light-out edge, the plurality of sixth protrusions include a nearest sixth protrusion nearest to the first light-out edge, an end of the farthest fifth protrusion away from the second hole edge between the second hole edge and the second light-out edge is a first end, an end of the farthest fifth protrusion away from the second hole edge between the second hole edge and the third light-out edge is a second end, an end of the nearest sixth protrusion close to the second light-out edge is a third end, an end of the nearest sixth protrusion close to the third light-out edge is a fourth end, an included angle between a first virtual connecting line connecting the first end and the third end and the first direction is in a range of 45 degrees to 90 degrees, an included angle between a second virtual connecting line connecting the second end and the fourth end and the first direction is in a range of 45 degrees to 90 degrees, and fifth protrusions and sixth protrusions between the farthest fifth protrusion and the nearest sixth protrusion are also located in a region defined by the first virtual connecting line and the second virtual connecting line.

[0039] For example, in the light guide plate provided by the embodiment of the present disclosure, a distance between two adjacent protrusions in the plurality of protrusions is in a range of 25 μm to 100 μm, and a height of the plurality of protrusions is in a range of 0.3 μm to 2 μm.

[0040] The backlight module provided by at least one embodiment of the present disclosure includes the light guide plate and a light source, and the light source is located on one side of the light-in surface of the light guide plate.

[0041] The liquid crystal display panel provided by at least one embodiment of the present disclosure includes the backlight module and a liquid crystal display module, and the liquid crystal display module is located on one side of the light-out surface of the light guide plate.

[0042] The light guide plate mold for the light guide plate provided by at least one embodiment of the present disclosure includes a first surface and a second surface opposite to each other, the first surface includes a plurality of forming grooves recessed toward the second surface to form the plurality of reflecting elements of the light guide plate at the plurality of forming grooves, each of the forming grooves includes a first concave surface and a second concave surface to form the first convex surface and the second convex surface of the reflecting element at the first concave surface and the second concave surface, the first concave surface and the second concave surface intersect, a maximum distance between an edge of the first concave surface away from the second concave surface and the second surface is a third distance, a maximum distance between an edge of the first concave surface away from the second concave surface and the second surface is a fourth distance, and the third distance is smaller than the fourth distance.

[0043] For example, in the light guide plate mold provided by the embodiment of the present disclosure, the plurality of forming grooves comprises a first forming groove, the first forming groove comprises three first concave surfaces and one second concave surface, and the second concave surface intersects with each of the three first concave surfaces.

[0044] For example, in the light guide plate mold provided by the embodiment of the present disclosure, the first surface further comprises a forming plane, the first concave surface and the second concave surface are located on one side of the forming plane close to the second surface, the first concave surface comprises a first forming edge located on the forming plane, the first forming edge comprises a circular arc, and the second concave surface comprises a plurality of second forming edges located on the forming plane, and the plurality of second forming edges are substantially located on the same forming virtual circle.

[0045] For example, in the light guide plate mold provided by the embodiment of the present disclosure, the diameter of the forming virtual circle is less than or equal to the diameter of the first forming edge.

[0046] For example, in the light guide plate mold provided by the embodiment of the present disclosure, the plurality of forming grooves further comprises a second forming groove, the second forming groove comprises two second concave surfaces and one second concave surface, and / or the plurality of forming grooves further comprises a third forming groove, the third forming groove comprises one second concave surface and one second concave surface.

[0047] The embodiment of the present disclosure provides a manufacturing method of a light guide plate mold, comprising: providing a light guide plate mold base material, wherein the light guide plate mold base material comprises a first initial surface and a second surface opposite to each other, and the first initial surface comprises a first preset area; forming a plurality of first initial concave surfaces in the first preset area of the first initial surface; and forming a plurality of second concave surfaces in the first preset area, wherein the second concave surface is overlapped with the first initial concave surface in the orthographic projection of the second surface, after the second concave surface is formed, the first initial concave surface becomes the first concave surface and intersects with the second concave surface, the first initial surface becomes a first surface, the light guide plate mold base material becomes a light guide plate mold, the maximum distance between the edge line where the first concave surface and the second concave surface intersect and the second surface is a third distance, and the maximum distance between the edge of the first concave surface away from the second concave surface and the second surface is a fourth distance, and the third distance is less than the fourth distance.

[0048] For example, in the manufacturing method provided by the embodiment of the present disclosure, at least part of the first initial concave surfaces of the plurality of first initial concave surfaces are tangent to each other.

[0049] For example, in a manufacturing method provided in an embodiment of this disclosure, the first initial surface further includes a second preset region that at least partially surrounds the first preset region. The manufacturing method further includes forming a plurality of third concave surfaces in the second preset region of the first initial surface, wherein the third concave surfaces and the first initial concave surfaces are formed using the same molding process.

[0050] In the light guide plate provided in this embodiment, the intersecting first and second convex surfaces of the reflective element allow the reflective element to have a larger reflective surface area, and the area ratio of the reflective surface of the reflective element per unit area is larger, thereby increasing the reflection efficiency of the light guide plate in the first reflective region. By setting multiple first protrusions, the backlight source on the light-incident surface side can be introduced to the side of the second aperture edge away from the light-incident surface through the first sub-protrusions and the first sub-arc-shaped protrusions, thereby improving the brightness of the area on the side of the second aperture edge away from the light-incident surface. Attached Figure Description

[0051] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this disclosure and are not intended to limit this disclosure.

[0052] Figure 1 is a schematic diagram of the structure of a liquid crystal display panel;

[0053] Figure 2 shows a display defect diagram of the area behind the hole in a display panel and an optical simulation diagram of the area around the hole;

[0054] Figure 3 is a schematic diagram of the structure of a light guide plate provided in an embodiment of this disclosure;

[0055] Figure 4 is a schematic diagram of the structure of the first reflective region in Figure 3;

[0056] Figure 5 is a partial enlarged view of the reflective element in Figure 4;

[0057] Figure 6 is a projection schematic diagram of the reflective element in Figure 4;

[0058] Figure 7 is a cross-sectional schematic diagram of the reflective element in Figure 6 along the illustrated section line EE;

[0059] Figure 8 is a schematic diagram of another reflective element provided in an embodiment of this disclosure;

[0060] Figure 9 is a partial enlarged view of a reflective dot pattern provided in an embodiment of this disclosure;

[0061] Figure 10 is a product schematic diagram of a light guide plate provided in an embodiment of this disclosure;

[0062] Figure 11 is a schematic diagram of the light-emitting surface of a light guide plate;

[0063] Fig. 12 is a schematic plan view of the light-exit face of the light guide plate of Fig. 3;

[0064] Fig. 13 is a schematic sectional view of the light guide plate of Fig. 12 along section line FF;

[0065] Fig. 14 is another schematic plan view of the light-exit face of the light guide plate of Fig. 3;

[0066] Fig. 15 is another schematic plan view of the light-exit face of the light guide plate of Fig. 3;

[0067] Fig. 16 is another schematic plan view of the light-exit face of the light guide plate of Fig. 3;

[0068] Fig. 17 is another schematic plan view of the light-exit face of the light guide plate of Fig. 3;

[0069] Fig. 18 is another schematic plan view of the light-exit face of the light guide plate of Fig. 3;

[0070] Fig. 19 is a schematic enlarged view of a portion of the light-exit face of the light guide plate of Fig. 18;

[0071] Fig. 20 is another schematic plan view of the light-exit face of the light guide plate of Fig. 3;

[0072] Fig. 21 is a schematic view of the improved effect of a display panel using the light guide plate provided by an embodiment of the present disclosure;

[0073] Fig. 22 is a schematic view of a backlight module provided by an embodiment of the present disclosure;

[0074] Fig. 23 is a schematic view of a liquid crystal display panel provided by an embodiment of the present disclosure;

[0075] Fig. 24 is a schematic view of the projection of a light guide plate mold provided by an embodiment of the present disclosure;

[0076] Fig. 25 is a schematic sectional view of the light guide plate mold of Fig. 24 along section line GG;

[0077] Fig. 26 is another schematic view of the structure of a forming groove of a light guide plate mold provided by an embodiment of the present disclosure;

[0078] Fig. 27 is another schematic view of the structure of a forming groove of a light guide plate mold provided by an embodiment of the present disclosure;

[0079] Fig. 28 is a flowchart of a manufacturing method of a light guide plate mold provided by an embodiment of the present disclosure; and

[0080] Fig. 29 is a schematic view of a partial structure of a light guide plate mold formed according to the manufacturing method of the present disclosure. DETAILED DESCRIPTION

[0081] In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the following will be used in conjunction with the accompanying drawings of the embodiments of the present disclosure to make a clear and complete description of the technical solutions of the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present disclosure.

[0082] Unless otherwise defined, technical terms or scientific terms used in the present disclosure shall have the ordinary meaning of the terms to a person of ordinary skill in the art to which the present disclosure belongs. The terms "first", "second" and similar terms used in the present disclosure do not denote any order, quantity or importance, but are used to distinguish different components. The terms "include" or "contain" and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connect" or "connected" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0083] Unless otherwise defined, the terms "parallel", "perpendicular" and "same" and the like used in the embodiments of the present disclosure include the cases of "strictly parallel", "strictly perpendicular", "strictly same" and the like, and the cases of "approximately parallel", "approximately perpendicular", "approximately same" and the like with certain errors. For example, the above "approximately" can mean that the difference between the compared objects is within 10% or 5% of the average value of the compared objects. In the following of the embodiments of the present disclosure, when the number of a component or element is not specifically indicated, it means that the component or element can be one or multiple, or can be understood as at least one. "At least one" means one or more, and "multiple" means at least two. In the embodiments of the present disclosure, "same layer" refers to the relationship between multiple film layers formed by the same material after the same step (for example, one patterning process). Here, "same layer" does not always mean that the thicknesses of the multiple film layers are the same or the heights of the multiple film layers in the cross-sectional view are the same.

[0084] Figure 1 is a structural schematic diagram of a liquid crystal display panel. As shown in Figure 1, the liquid crystal display panel includes a glass cover plate 01, optical glue 02, polarizer 031 and polarizer 032, liquid crystal cell 04, glue frame 05, iron frame 06, reflective sheet 07, light guide plate 08, diffusion sheet 09, light enhancement sheet 010, light shielding glue 011, glue coating 012, etc. The glass cover plate 01 is used to protect the liquid crystal cell 04 and reduce the risk of screen breakage. The optical glue 02 can be a double-sided adhesive tape without a base material, which bonds the glass cover plate 01 and the liquid crystal cell 04 together. The polarizer 031 and the polarizer 032 are optical devices for polarization, which are used to generate available polarized light. The liquid crystal cell 04 is composed of a color filter layer, a pixel driving circuit layer, a liquid crystal layer, etc., and is the core display imaging component of the liquid crystal display panel. The glue frame 05 and the iron frame 06 play a supporting and fixing role. The reflective sheet 07 can reflect the light transmitted by the light guide plate 08 to improve the brightness of the module. The light guide plate 08 plays a role of light transmission, which converts the LED point light source into a surface light source. The diffusion sheet 09 can scatter the light transmitted by the light guide plate 08 to display more uniformly. The light enhancement sheet 010 can converge light to improve the brightness of the backlight. The light shielding glue 011 can block the edge light of the opening 013 and fix the film material and the liquid crystal cell 04, etc. The glue coating 012 can block the light of the backlight module to prevent light leakage.

[0085] For the LCD display panel of the side-in type backlight, a plurality of conventional convex surfaces are usually arranged on the reflection surface of the light guide plate, and the projection of the conventional convex surface on the light exit surface of the light guide plate is a circle. Due to the structure of the opening separating and blocking the light source, the light in the hole rear area of the display panel away from the backlight is sparse, and the hole rear area has problems such as dark display and uneven display, causing customer complaints, and the smaller the size of the hole rear area, the more serious the problem of the hole rear area.

[0086] Figure 2 is a display defect diagram of the hole rear area of a display panel and an optical simulation diagram of the hole periphery. The arrow indicating position 015 in Figure 2(a) shows that the hole rear area has a dark area with low brightness compared with other areas. Figure 2(b) shows the optical simulation of the hole rear area, which can be seen that the light in the hole rear area is sparse, resulting in low brightness in the hole rear area.

[0087] The embodiment of the present disclosure provides a light guide plate. The light guide plate comprises a light-in surface, a light-out surface intersecting the light-in surface, and a reflecting surface oppositely arranged with the light-out surface, and further comprises an opening. The opening comprises a first hole edge located at the reflecting surface, the reflecting surface comprises a first reflecting area, the first reflecting area is located at a side of the first hole edge away from the light-in surface, a projection of the first reflecting area on the light-in surface overlaps a projection of the first hole edge on the light-in surface, in the first reflecting area, the reflecting surface comprises a plurality of reflecting elements, the reflecting element comprises a first convex surface and a second convex surface protruding away from the light-out surface, the first convex surface and the second convex surface intersect, a maximum distance between the intersection line of the first convex surface and the second convex surface and the light-out surface is a first distance, and a maximum distance between an edge of the first convex surface away from the second convex surface and the light-out surface is a second distance, the first distance is greater than the second distance.

[0088] The convex surface on the reflecting surface can converge the light emitted by the light source. The larger the area of the convex surface is, the higher the brightness of the backlight module in which the light guide plate is located is. By arranging the reflecting elements in the first reflecting area, the first convex surface and the second convex surface of the reflecting element intersect, and the first distance between the intersection line of the first convex surface and the second convex surface and the light-out surface is greater than the second distance between the edge of the first convex surface away from the second convex surface and the light-out surface. Compared with a plurality of independent conventional convex surfaces arranged at intervals, the first convex surface and the second convex surface of the reflecting element intersect, the intersecting first convex surface and the second convex surface of the reflecting element can make the reflecting element have a larger area of the reflecting surface, and the area ratio of the reflecting surface of the reflecting element in a unit area is larger, thereby increasing the reflecting efficiency of the light guide plate in the first reflecting area, improving the brightness of the display panel at the first reflecting area, and improving the display effect and display uniformity of the display panel at the first reflecting area. In addition, the second convex surface can also utilize the space between adjacent first convex surfaces to make the reflecting element have a larger reflecting area. The improvement of the reflecting efficiency of the first reflecting area by the reflecting element does not involve an increase in material cost and manufacturing cost, and does not require the module or the display panel in which the light guide plate is located to increase the avoiding space.

[0089] The opening further comprises a second hole edge located at the light-out surface, the light-out surface comprises a plurality of protrusions, the plurality of protrusions comprises a plurality of first protrusions, each first protrusion comprises a pair of first sub-protrusions and a first sub-arc-shaped protrusion, along a first direction, two first sub-protrusions of the pair of first sub-protrusions are respectively located at two sides of the second hole edge, the pair of first sub-protrusions extends along a second direction, the first direction is parallel to the light-in surface, the second direction is parallel to the light-out surface and perpendicular to the first direction, a virtual line passing through the end of the first sub-protrusion away from the light-in surface and parallel to the first direction passes through the second hole edge, two ends of the first sub-arc-shaped protrusion are respectively connected to the ends of the pair of first sub-protrusions away from the light-in surface, the first sub-arc-shaped protrusion is located at a side of the second hole edge away from the light-in surface, and the first sub-arc-shaped protrusions of the plurality of first protrusions are arranged at intervals.

[0090] By arranging the plurality of first protrusions, the backlight on the light-in surface side can be introduced to the side of the second hole edge far from the light-in surface through the first sub-protrusion and the first sub-arc-shaped protrusion, so that the brightness of the area on the side of the second hole edge far from the light-in surface can be improved, the brightness of the display panel at the area is improved, and the display effect and display uniformity of the display panel at the area are improved.

[0091] The embodiment of the present disclosure provides a light guide plate mold for manufacturing a light guide plate. The light guide plate mold comprises a first surface and a second surface opposite to each other, the first surface comprises a plurality of forming grooves recessed towards the second surface to form a plurality of reflecting elements of the light guide plate in the preceding text at the plurality of forming grooves, each forming groove comprises a first concave surface and a second concave surface to form a first convex surface and a second convex surface of the reflecting element of the light guide plate at the first concave surface and the second concave surface. The first concave surface and the second concave surface intersect, the maximum distance between the intersection line of the first concave surface and the second concave surface and the second surface is a third distance, and the maximum distance between the edge of the first concave surface away from the second concave surface and the second surface is a fourth distance. The third distance is smaller than the fourth distance. The light guide plate mold provided by the embodiment of the present disclosure can form the light guide plate in the preceding text, so that the light guide plate mold has the beneficial technical effects corresponding to the beneficial technical effects of the light guide plate in the preceding text, which will not be repeated here.

[0092] In the following, the light guide plate, the backlight module, the liquid crystal display panel, the light guide plate mold and the manufacturing method thereof provided by the embodiment of the present disclosure will be described in detail in combination with the drawings.

[0093] The embodiment of the present disclosure provides a light guide plate. Fig. 3 is a structural schematic diagram of a light guide plate provided by an embodiment of the present disclosure; Fig. 4 is a structural schematic diagram of a first reflecting region of Fig. 3; Fig. 5 is a partial enlarged view of a reflecting element in Fig. 4; Fig. 6 is a projection schematic diagram of the reflecting element of Fig. 4; and Fig. 7 is a sectional schematic diagram of the reflecting element of Fig. 6 along the indicated section line EE. It should be noted that, in order to more clearly show the reflecting element 110, Fig. 4 only schematically shows the reflecting element 110 in the first reflecting region R1, and the reflecting structure in the second reflecting region R2 is omitted.

[0094] As shown in Figs. 3 to 7, the light guide plate 100 comprises a light-in surface S1, a light-out surface S2 intersecting the light-in surface S1, a reflecting surface S3 oppositely arranged with the light-out surface S2, and an opening H. The opening H comprises a first hole edge H1 located at the reflecting surface S3, the reflecting surface S3 comprises a first reflecting region R1 located at the side of the first hole edge H1 far from the light-in surface S1, and the orthographic projection of the first reflecting region R1 on the light-in surface S1 overlaps the orthographic projection of the first hole edge H1 on the light-in surface S1.

[0095] In the first reflection region R1, the reflecting surface S3 includes a plurality of reflecting elements 110, and the reflecting elements 110 include a first convex surface 111 and a second convex surface 112 which protrude away from the light emitting surface S2. As shown in FIG. 5, the reflecting elements 110 include three first convex surfaces 111 and one second convex surface 112, however, the number of the first convex surfaces is not limited in the present disclosure.

[0096] The first convex surface 111 and the second convex surface 112 intersect, and the maximum distance between the intersection line 113 of the first convex surface 111 and the second convex surface 112 and the light emitting surface S2 is a first distance D1, and the maximum distance between the edge of the first convex surface 111 away from the second convex surface 112 and the light emitting surface S2 is a second distance D2, and the first distance D1 is greater than the second distance D2.

[0097] The convex surfaces on the reflecting surface can converge the light emitted by the light source, and the greater the area of the convex surface, the higher the brightness of the backlight module in which the light guide plate is located. The reflecting elements are arranged in the first reflection region, and the reflecting elements have intersecting first convex surfaces and second convex surfaces, and the first distance from the intersection line of the first convex surface and the second convex surface to the light emitting surface is greater than the second distance from the edge of the first convex surface away from the second convex surface to the light emitting surface. Compared with a plurality of independent conventional convex surfaces arranged at intervals or even closely arranged, the first convex surface and the second convex surface of the reflecting element intersect, and the intersecting first convex surface and the second convex surface of the reflecting element can make the reflecting element have a larger area of the reflecting surface, and the area ratio of the reflecting surface of the reflecting element in a unit area is larger, thereby increasing the reflection efficiency of the light guide plate in the first reflection region, improving the brightness of the display panel at the first reflection region, and improving the display effect and display uniformity of the display panel at the first reflection region. In addition, the second convex surface can also utilize the space between adjacent first convex surfaces, so that the reflecting element has a larger reflecting area. The improvement of the reflection efficiency of the reflecting element in the first reflection region does not involve the increase of material cost and manufacturing cost, and does not require the module or the display panel in which the light guide plate is located to increase the avoiding space.

[0098] For example, as shown in FIGS. 4 and 5, two adjacent reflecting elements 110 can be arranged closely. Thus, the reflection efficiency of the light guide plate 100 in the first reflection region R1 can be increased. For example, the minimum distance between the two adjacent reflecting elements 110 is greater than or equal to zero.

[0099] In some examples, as shown in FIG. 3 and FIG. 4, the first hole edge H1 falls within the orthogonal projection of the first reflection region R1 on the light-incident surface S1. Of course, the present disclosure does not limit this. For example, the orthogonal projection of the first hole edge on the light-incident surface can coincide with the orthogonal projection of the first reflection region on the light-incident surface. For example, the orthogonal projection of the first reflection region on the light-incident surface can fall within the orthogonal projection of the first hole edge on the light-incident surface. Thus, the light-extraction efficiency of the light guide plate in the region on the side of the first hole edge away from the light-incident surface can be improved, and the display effect and display uniformity in this region can be improved.

[0100] For example, as shown in FIG. 5 and FIG. 6, the edge line 113 where the first convex surface 111 and the second convex surface 112 intersect is an arc. For example, the orthogonal projection of the edge line 113 on the light-exit surface S2 can be a straight line. However, the present disclosure does not limit this, and the orthogonal projection of the edge line 113 on the light-exit surface S2 can also be an arc.

[0101] In some examples, as shown in FIG. 5 to FIG. 7, the plurality of reflection elements 110 includes a first reflection element 110a, the first reflection element 110a includes three first convex surfaces 111 and one second convex surface 112, and the second convex surface 112 intersects all three first convex surfaces 111. Thus, the reflecting surface of the first reflection element 110a has a larger area and a larger area ratio, and the reflection efficiency of the light guide plate 100 is increased. Compared with three independent conventional convex surfaces arranged in a spaced manner, for example, the positions of the three conventional convex surfaces are approximately equal to those of the three first convex surfaces 111, however, the first reflection element 110a of the present disclosure further includes the second convex surface 112 intersecting the three first convex surfaces 111, and thus the total area of the convex surfaces of the first reflection element 110a is larger than the sum of the areas of the three independent conventional convex surfaces, and the area ratio of the convex surfaces of the first reflection element 110a in a unit area is greater than the area ratio of the convex surfaces of the three independent conventional convex surfaces, and thus the first reflection element 110a has a higher reflection efficiency. The improvement principles of the second reflection element 110b and the third reflection element 110c mentioned later are the same as those of the first reflection element 110a, and thus will not be described again.

[0102] For example, as shown in FIG. 5 to FIG. 7, the shapes of the three first convex surfaces 111 are approximately the same. For example, the orthogonal projections of the three first convex surfaces 111 on the light-exit surface S2 are approximately the same. For example, the three first convex surfaces 111 are centrally symmetric. For example, the first reflection element 110a is centrally symmetric. Thus, the emitted light of the reflection element can be made more symmetrical and uniform, and the light-exit of the light guide plate can be made more uniform.

[0103] In some examples, as shown in FIG. 6, the gap between the orthographic projections of the three first convex surfaces 111 on the light-exit face S2 overlaps with the orthographic projection of the second convex surface 112 on the light-exit face S2. Thus, the second convex surface 112 can increase the area of the reflective face of the first reflective element 110a, so that the reflective face of the first reflective element 110a has a larger area and a larger area ratio, and the reflective efficiency of the light guide plate 100 is increased.

[0104] In some examples, as shown in FIG. 5 and FIG. 7, the reflective face S3 further comprises a reflective plane S30, the first convex surface 111 and the second convex surface 112 are located on a side of the reflective plane S30 away from the light-exit face S2, the first convex surface 111 comprises a first edge 1110 located on the reflective plane S30, the first edge 1110 comprises a first circular arc. The second convex surface 112 comprises a plurality of second edges 1120 located on the reflective plane S30, and the plurality of second edges 1120 are substantially located on the same virtual circle 001. By making the plurality of second edges 1120 substantially located on the same virtual circle 001, not only can the molding process of the reflective element 110 be simplified, but also the light emission can be more uniform.

[0105] For example, as shown in FIG. 5, the second edges 1120 are located between two adjacent first convex surfaces 111 in the same first reflective element 110a. Thus, the second convex surface can better cover the gap between the two adjacent first convex surfaces 111, so that the first reflective element has a larger reflective area.

[0106] For example, as shown in FIG. 5, the diameter of the virtual circle 001 can be equal to or less than the diameter of the first edge 1110. For example, the same diameter can make the light emission more uniform.

[0107] For example, as shown in FIG. 5, the diameter of the first edge 1110 is in the range of 40-50 μm. For example, the diameter of the virtual circle 001 is in the range of 40-50 μm.

[0108] In some examples, the surface roughness of the first convex surface is less than the surface roughness of the second convex surface. For example, the mold surface of the first convex surface and the mold surface of the second convex surface are formed by different molding processes. For example, one molding process can be used to form the mold surface of the first convex surface, and another molding process can be used to form the mold surface of the second convex surface. For example, the mold surface of the first convex surface can be formed by a point-impact process. For example, the mold surface of the second convex surface can be formed by a laser process.

[0109] In some examples, the surface roughness of the first convex surface is in the range of 0-1 μm, and the surface roughness of the second convex surface is in the range of 1-2 μm. For example, the above-mentioned surface roughness can use the profile arithmetic mean deviation Ra.

[0110] In some examples, as shown in FIG. 5, the first edge 1110 of the first convex surface 111 on the reflection plane S30 can be continuous. For example, the second edge 1120 of the second convex surface 112 can be discontinuous. For example, the second edge 1120 of the second convex surface 112 can be jagged. For example, the intersecting edge line 113 of the first convex surface 111 and the second convex surface 112 can be discontinuous. For example, the intersecting edge line 113 can be jagged.

[0111] In some examples, as shown in FIG. 5 and FIG. 6, the edge of the first convex surface 111 in the orthographic projection of the light-exit surface S2 includes a second circular arc, and the length L1 of the intersecting edge line 113 of the first convex surface 111 and the second convex surface 112 in the orthographic projection of the light-exit surface S2 is not greater than 0.9 times the diameter d1 of the second circular arc. By making the length L1 not greater than 0.9 times d1, the problem of white spot failure can be avoided, and the yield of the product can be improved. The projection of the intersecting edge line 113 is schematically shown as a straight line in the figure, however, the embodiments of the present disclosure are not limited thereto, and the projection of the intersecting edge line can also be a curve.

[0112] In some examples, as shown in FIG. 6, the distance D3 between the orthographic projection of the intersecting edge line 113 of the first convex surface 111 and the second convex surface 112 on the light-exit surface S2 and the center of the second circular arc is not less than 0.6 times the diameter d1 of the second circular arc. Thus, the problem of white spot failure can be avoided.

[0113] In some examples, as shown in FIG. 6, the distance D4 between the centers of the orthographic projections of the second convex surfaces 112 of two adjacent reflective elements 110 on the light-exit surface S2 is not less than 2 times the diameter d1 of the second circular arc. Thus, the problem of white spot failure can be avoided.

[0114] In some examples, as shown in FIG. 6, the distance D4 between the centers of the orthographic projections of the second convex surfaces of two adjacent reflective elements on the light-exit surface is in the range of 80 μm-100 μm.

[0115] For example, as shown in FIG. 5 and FIG. 6, the first edge 1110 of the first convex surface 111 in the orthographic projection of the light-exit surface S2 includes a second circular arc, and the diameters of the second circular arcs of the three first convex surfaces 111 are equal. For example, the three first convex surfaces 111 are centrally symmetric. For example, the first reflective element 110a is centrally symmetric.

[0116] In some examples, as shown in FIG. 5 and FIG. 6, the first edge 1110 of the first convex surface 111 includes a first circular arc, the first edge 1110 of the first convex surface 111 is at the center O1 of the orthographic projection of the light-exit surface S2, the second convex surface 112 includes a plurality of second edges 1120 located on the reflection plane S30, the plurality of second edges 1120 are approximately located on the same virtual circle 001, the virtual circle 001 is at the center O2 of the orthographic projection of the light-exit surface S2, and the virtual circle 001 is equidistant from the center O1 of the orthographic projection of the light-exit surface S2 and the center O2 of the orthographic projection of the light-exit surface S2. Thus, the second convex surface 112 can more evenly cover the gaps between the three first convex surfaces 111, which can on the one hand better increase the area of the reflection surface of the first reflection element 110a, and on the other hand can make the light-exit more uniform.

[0117] It should be noted that the center of the orthographic projection of the virtual circle 001 on the light-exit surface S2 and the center of the orthographic projection of the second convex surface 112 on the light-exit surface S2 can be coincident. The center of the orthographic projection of the virtual circle 001 on the light-exit surface S2 is the center of the orthographic projection of the virtual circle 001 on the light-exit surface S2. The center of the orthographic projection of the first edge 1110 of the first convex surface 111 on the light-exit surface S2 is the center of the orthographic projection of the circle on which the first edge 1110 is located on the light-exit surface S2.

[0118] For example, as shown in FIG. 5 and FIG. 6, the line connecting the three centers O1 is an equilateral triangle, and the center point of the equilateral triangle is the center O2. For example, the smallest gap between the three first convex surfaces 111 can be zero.

[0119] For example, as shown in FIG. 5 and FIG. 6, the second convex surface 112 is a central symmetric figure,

[0120] In some examples, the first edge of the first convex surface includes a first circular arc, and the edge of the second convex surface is approximately located on the same virtual circle. In the same reflection element, the center of the orthographic projection of the virtual circle on the light-exit surface and the center of the orthographic projection of the first edge of the plurality of first convex surfaces on the light-exit surface can also be unequal. For example, such an arrangement can simplify the manufacturing process, improve the manufacturing efficiency, improve the yield, etc.

[0121] In some examples, as shown in FIG. 6, the circles on which the first edges 1110 of the adjacent two first convex surfaces 111 of the same reflection element 110 are located can be tangent. Thus, the number of reflection elements per unit area can be increased as much as possible.

[0122] In some examples, as shown in FIG. 6, the first edge 1110 of the first convex surface 111 has a radius of r in the orthogonal projection of the light-exit surface S2, and the center distance between two adjacent first convex surfaces 111 of the same reflective element 110 is D5. For example, when the first edges 1110 of two adjacent first convex surfaces 111 of the same reflective element 110 are tangent to a circle, D5 = 2r. The distance between the center O2 of the orthogonal projection of the second convex surface 112 on the light-exit surface S2 and the center O1 of the first convex surface 111 is D6.

[0123] For example, the diameter of the second circular arc is in the range of 40-50 μm.

[0124] FIG. 8 is a structural schematic diagram of another reflective element provided by an embodiment of the present disclosure. As shown in FIGS. 8(a) and (b), the plurality of reflective elements 110 includes a second reflective element 110b, and FIGS. 8(a) and (b) show two different arrangement modes of the second reflective element 110b. The second reflective element 110b includes two first convex surfaces 111 and one second convex surface 112, and the second convex surface 112 intersects with the two first convex surfaces 111. Thus, the second convex surface 112 can increase the area of the reflective surface of the second reflective element 110b, so that the reflective surface of the second reflective element 110b has a larger area and a larger area ratio, and the reflective efficiency of the light guide plate 100 is increased.

[0125] In some examples, as shown in FIGS. 8(a) and (b), the gap between the orthogonal projections of the two first convex surfaces 111 on the light-exit surface S2 overlaps with the orthogonal projection of the second convex surface 112 on the light-exit surface S2. Thus, the second convex surface 112 can increase the area of the reflective surface of the second reflective element 110b, so that the reflective surface of the second reflective element 110b has a larger area and a larger area ratio, and the reflective efficiency of the light guide plate 100 is increased.

[0126] For example, as shown in FIG. 8(a), the second convex surface 112 of the second reflective element 110b is located between the two first convex surfaces 111, and the three convex surfaces are arranged in a straight line. For example, as shown in FIG. 8(b), the three convex surfaces of the second reflective element 110b are arranged in a triangle. The arrangement mode of the three convex surfaces is not limited in the embodiments of the present disclosure. For example, the arrangement can be made according to the shape of the space, etc.

[0127] In some examples, as shown in FIG. 8(c), the plurality of reflective elements 110 includes a third reflective element 110c, and the third reflective element 110c includes one first convex surface 111 and one second convex surface 112.

[0128] It should be noted that the second reflective element 110b and the third reflective element 110c of the embodiments of the present disclosure are not limited to the above specific embodiments, and the description of the size, roughness, etc. of the first convex surface 111 and the second convex surface 112 in the second reflective element 110b and the third reflective element 110c can be the same as the first reflective element 110a, and thus the relevant description of the first reflective element 110a is also applicable to the second reflective element 110b and the third reflective element 110c, which will not be repeated here.

[0129] In some examples, the reflective element can include a plurality of first convex surfaces and one second convex surface. In addition to the embodiments shown above, for example, the reflective element can also include four first convex surfaces and one second convex surface. For example, the reflective element can also include five first convex surfaces and one second convex surface. For example, the reflective element can also include six first convex surfaces and one second convex surface. This will not be repeated here.

[0130] In some examples, as shown in FIGS. 3 and 4, in the first reflection region R1, the reflective surface S3 can include at least one of the first reflective element 110a, the second reflective element 110b, and the third reflective element 110c. For example, the reflective surface S3 can be all the first reflective element 110a, or can include three kinds of reflective elements 110 or any two kinds of reflective elements 110. The arrangement manner, number, etc. of the first reflective element, the second reflective element, and the third reflective element of the embodiments of the present disclosure are not limited. For example, a plurality of reflective elements can be arranged in close proximity. For example, the gap between the two adjacent reflective elements can be equal to 0.

[0131] FIG. 9 is a partial enlarged view of a reflective dot provided by the embodiments of the present disclosure. As shown in FIG. 9, in the first reflection region R1, the reflective surface S3 further includes a reflective dot 120, and the reflective dot 120 includes a third convex surface 121 convexly facing away from the light exit surface S2. For example, by setting the reflective dot in the first reflection region, the number of reflective elements can be controlled to adjust the reflectivity. For example, the size of the reflective dot is smaller than the size of the reflective element, and in some small size positions, the reflective dot can be set, so that the effective area of the convex surface in the first reflection region can be improved.

[0132] For example, as shown in FIGS. 6 and 9, the edge of the reflective dot 120 in the orthographic projection of the light exit surface S2 includes a circle. For example, the diameter of the orthographic projection of the edge of the third convex surface 121 on the light exit surface S2 is equal to the diameter d1 of the orthographic projection of the edge of the first convex surface 111 on the light exit surface S2. Thus, the light emitted by the light guide plate 100 can be made more uniform. Of course, the embodiments of the present disclosure are not limited thereto.

[0133] In some examples, the adjacent reflective dots and the reflective elements can be arranged closely. Thus, more reflective surfaces can be provided in the first reflective region. For example, the minimum distance between the adjacent reflective dots and the reflective elements is greater than or equal to zero.

[0134] In some examples, in the first reflective region, the reflective surfaces further include a plurality of reflective dots. Two adjacent reflective dots can be arranged closely. Thus, more reflective surfaces can be provided in the first reflective region. For example, the minimum distance between the adjacent reflective dots is greater than or equal to zero.

[0135] In some examples, the roughness of the first convex surface of the reflective elements is substantially equal to the roughness of the third convex surface of the reflective dots. For example, the same molding process is used to form the mold surface of the first convex surface and the third convex surface.

[0136] In some examples, in the first reflective region, the ratio of the number of the second convex surfaces to the number of the first convex surfaces ranges from 1 / 9 to 1 / 3. For example, the ratio can be 1 / 6, 1 / 5, 1 / 4, etc. For example, the first convex surfaces are processed first, and then the second convex surfaces are processed. By making the ratio not greater than 1 / 3, the white spot problem can be avoided.

[0137] In some examples, in the first reflective region, the reflective surfaces further include reflective dots, and the ratio of the number of the second convex surfaces to the sum of the number of the first convex surfaces and the number of the third convex surfaces ranges from 1 / 9 to 1 / 3. For example, the ratio can be 1 / 6, 1 / 5, 1 / 4, etc. By making the ratio not greater than 1 / 3, the white spot problem can be avoided.

[0138] In some examples, in the first reflective region, the number of the second convex surfaces per square millimeter ranges from 100 to 300, and the sum of the number of the first convex surfaces and the number of the third convex surfaces ranges from 300 to 900.

[0139] In some examples, as shown in FIG. 3, the reflective surface S3 further includes a second reflective region R2 surrounding the first reflective region R1 at least partially.

[0140] For example, as shown in FIG. 3 and FIG. 9, in the second reflective region R2, the reflective surface S3 includes a plurality of reflective dots 120, the reflective dots 120 include third convex surfaces 121 protruding away from the light-out surface S2, and the minimum distance between two adjacent third convex surfaces 121 is greater than or equal to zero.

[0141] For example, as shown in FIG. 3 and FIG. 9, in the second reflective region R2, the reflective surface S3 can only be provided with the reflective dots 120.

[0142] For example, along the direction from the light-incident surface to the opening, the number of the reflective dots in a unit area increases, the density of the reflective dots increases, and the distance between two adjacent reflective dots decreases. Thus, the light rays entering from the light-incident surface can be reflected better.

[0143] For example, the distance between two adjacent reflective dots in the first direction is substantially equal.

[0144] For example, as shown in FIG. 9, the reflective dot 120 includes a third edge 1210. For example, the third edge 1210 can be a circle. For example, the first edge 1110 of the first convex surface 111 of the reflective element 110 located in the first reflective region R1 is a first circular arc, and the diameter of the first circular arc can be equal to the diameter of the third edge 1210. Thus, the processing of the light guide plate can be simplified, the processing efficiency can be improved, and the yield can be improved. For example, the number of the first convex surfaces in a unit area in the first reflective region is greater than the number of the second convex surfaces in a unit area in the second reflective region.

[0145] FIG. 10 is a product schematic diagram of a light guide plate according to an embodiment of the present disclosure. As shown in FIG. 10, in the first reflective region, the reflective surface of the light guide plate includes reflective elements, and the reflective elements include the first convex surface 111 and the second convex surface 112. For example, the second convex surface 112 of the reflective element of the light guide plate can intersect with different numbers of the first convex surface 111.

[0146] FIG. 11 is a schematic diagram of the light-incident surface of a light guide plate. As shown in FIG. 11, the protrusions 014 on the light-incident surface for conducting and converging light rays are disconnected at the opening 013, and the light rays cannot be transmitted to the area behind the opening, resulting in problems such as darkening of the area behind the opening.

[0147] FIG. 12 is a top view of the light-incident surface of the light guide plate of FIG. 3, and FIG. 13 is a sectional view of the light guide plate of FIG. 12 along the section line FF. As shown in FIG. 12 and FIG. 13, the opening H further includes a second hole edge H2 located on the light-incident surface S2, and the light-incident surface S2 includes a plurality of protrusions 130 protruding away from the reflective surface S3. The plurality of protrusions 130 include a plurality of first protrusions 131, and each first protrusion 131 includes a pair of first sub-protrusions 1311 and a first sub-arc-shaped protrusion 1312. It should be noted that, referring to the top view of FIG. 12 and the top views of FIG. 14 to FIG. 20 in the following description, in the top view, the protrusions are in the form of lines, for example, the protrusions extend in the first direction or the second direction in the form of straight lines. For example, the protrusions extend in the form of arcs.

[0148] In the first direction X, two first sub-protrusions 1311 of the pair of first sub-protrusions 1311 are respectively located on two sides of the second hole edge H2, and the pair of first sub-protrusions 1311 extends in the second direction Y. The first direction X is parallel to the light-incident surface S1, and the second direction Y is parallel to the light-emitting surface S2 and perpendicular to the first direction X.

[0149] A virtual line 002 passing through the end 13110 of the first sub-protrusion 1311 away from the light-incident surface S1 and parallel to the first direction X passes through the second hole edge H2. Two ends of the first sub-arc-shaped protrusion 1312 are respectively connected to the end 13110 of the pair of first sub-protrusions 1311 away from the light-incident surface S1, and the first sub-arc-shaped protrusion 1312 is located on the side of the second hole edge H2 away from the light-incident surface S1, and the first sub-arc-shaped protrusions 1312 of the plurality of first protrusions 131 are arranged at intervals.

[0150] The protrusions 130 on the light-emitting surface S2 of the light guide plate 100 can conduct and converge the light source on the side of the light-incident surface S1. Through the arrangement of the plurality of first protrusions 131, the backlight on the side of the light-incident surface S1 can be introduced to the side of the second hole edge H2 away from the light-incident surface S1 through the first sub-protrusion 1311 and the first sub-arc-shaped protrusion 1312. Thus, the brightness of the area on the side of the second hole edge H2 away from the light-incident surface S1 can be improved, the brightness of the display panel at this area is improved, and the display effect and display uniformity of the display panel at this area are improved. In addition, the improvement of the brightness of this area by the first protrusion 131 does not involve an increase in material cost, has little effect on manufacturing cost, and does not require the module or display panel in which the light guide plate is located to increase the avoidance space.

[0151] For example, the virtual line 002 can pass through the center of the second hole edge H2. Of course, the embodiments of the present disclosure are not limited in this regard.

[0152] For example, as shown in FIG. 12, the end 13110 of the plurality of first sub-protrusions 1311 is located on the same virtual line 002. Thus, not only is the machining and manufacturing of the first sub-protrusion 1311 and the first sub-arc-shaped protrusion 1312 facilitated, but also the light efficiency of the area where the end is located is more uniform.

[0153] In some examples, as shown in FIG. 12, the plurality of first sub-protrusions 1311 located on the same side of the second hole edge H2 are equidistantly arranged, and the ratio of the interval D6 between two adjacent first sub-arc protrusions 1312 to the interval D7 between two adjacent first sub-protrusions 1311 is in the range of 0.25-4. For example, the ratio can be 0.3, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, etc., and the present disclosure does not limit this, which can be set according to requirements. The ratio is 1 in the figure. For example, when the second hole edge H2 is closer to the first light-emitting edge S21 of the light-emitting surface S2 or the diameter of the opening H is larger, the interval D6 between two adjacent first sub-arc protrusions 1312 can be as small as possible, and at this time, the ratio can be less than 1.

[0154] For example, along the direction away from the light-incident surface S1 of the second hole edge H2, the intervals of the plurality of first sub-arc protrusions 1312 can be equal. For example, along the direction away from the light-incident surface S1 of the second hole edge H2, the intervals of the plurality of first sub-arc protrusions 1312 can gradually increase. According to different shapes of the display panel, shapes of the opening, and sizes of the distance between the opening and the first light-emitting edge, etc., different interval arrangement modes can be selected, so that the display effect of the area on the side of the second hole edge away from the light-incident surface can be more uniform.

[0155] In some examples, as shown in FIG. 12, the arc where the first sub-arc protrusion 1312 of the first protrusion 131 is located is tangent to the straight line where the pair of first sub-protrusions 1311 is located. Thus, not only does the arc of the first sub-arc protrusion 1312 become more rounded, but also the transition of the first protrusion 131 and the first sub-arc protrusion 1312 at the intersection position is more uniform, and the light effect at the intersection position is more uniform.

[0156] For example, as shown in FIG. 12, the shape of the first sub-arc protrusion 1312 can be a semicircle.

[0157] In some examples, as shown in FIG. 12, along the first direction X, the plurality of first sub-protrusions 1311 include a farthest first sub-protrusion 13111 farthest from the second hole edge H2. Along the first direction X, the distance D8 between the farthest first sub-protrusion 13111 and the second hole edge H2 is in the range of 1mm-3mm. For example, the distance can be 1.5mm, 2mm, 2.5mm, etc., and the present disclosure does not limit this.

[0158] FIG. 14 is another top view of the light-exit face of the light guide plate of FIG. 3. As shown in FIG. 14, the ratio of the distance D6 between two adjacent first sub-arc protrusions 1312 to the distance D7 between two adjacent first protrusions 1311 is 2. For example, the distance between two adjacent first sub-arc protrusions 1312 is equal. Thus, the display effect of the area on the side of the second hole edge H2 away from the light-incident face S1 can be improved, and the display effect can be more uniform.

[0159] The other structures, sizes, etc. of the embodiment shown in FIG. 14 can be the same as those of the embodiment shown in FIG. 12, and thus are not described again here.

[0160] FIG. 15 is another top view of the light-exit face of the light guide plate of FIG. 3. As shown in FIG. 15, the light-exit face S2 further includes a first light-exit edge S21 on the side of the second hole edge H2 away from the light-incident face S1. The first light-exit edge S21 is shown as a straight line in the figure. For example, the first light-exit edge can also be a curved line.

[0161] The plurality of protrusions 130 further includes a plurality of second protrusions 132. Each second protrusion 132 includes a second sub-protrusion 1321 and a second sub-arc protrusion 1322. In the first direction X, the second sub-protrusion 1321 is on the side of the first sub-protrusion 1311 away from the second hole edge H2. The end 13210 of the second sub-protrusion 1321 close to the first light-exit edge S21 is closer to the first light-exit edge S21 than the end 13110 of the first sub-protrusion 1311 close to the first light-exit edge S21. One end of the second sub-arc protrusion 1322 is connected to the end 13110 of the first sub-protrusion 1311 close to the first light-exit edge S21, and the other end of the second sub-arc protrusion 1322 is connected to the first light-exit edge S21. The center of curvature of the second sub-arc protrusion 1322 is on the side of the second sub-arc protrusion 1322 close to the second hole edge H2, and the second sub-arc protrusions 1322 of the plurality of second protrusions 132 are spaced apart. The second protrusion 132 is shown as including one second sub-protrusion 1321 and one second sub-arc protrusion 1322 in the figure, but the number of second sub-arc protrusions 1322 included in one second protrusion 132 is not limited in the embodiments of the present disclosure.

[0162] By arranging the plurality of second protrusions 132, the backlight on the side of the light-incident surface S1 can be introduced to the side of the second hole edge H2 away from the light-incident surface S1 through the second sub-protrusions 1321 and the second sub-arc-shaped protrusions 1322. Thus, the brightness of the area where the second protrusions 132, especially the second sub-arc-shaped protrusions 1322, are located can be improved, the brightness of the display panel at this area is improved, and the display effect and display uniformity of the display panel at this area are improved. In addition, the improvement of the brightness of this area by the second protrusions 132 does not involve an increase in material cost, has little effect on manufacturing cost, and does not require the module or display panel where the light guide plate is located to increase the avoidance space.

[0163] In some examples, as shown in FIG. 15, the plurality of second sub-protrusions 1321 located on the same side of the second hole edge H2 are arranged at equal intervals, and the ratio of the interval D9 between two adjacent second sub-arc-shaped protrusions 1322 to the interval D10 between two adjacent second sub-protrusions 1321 is in the range of 0.25-4. The ratio is approximately 2 in the figure. For example, the ratio can also be 0.3, 0.5, 1.5, 2, 2.5, 3, 3.5, etc., which is not limited in the present disclosure and can be set according to requirements.

[0164] For example, as shown in FIG. 15, the intervals of the plurality of second sub-arc-shaped protrusions 1322 can be equal. For example, along the direction of the second hole edge H2 away from the light-incident surface S1, the intervals of the plurality of second sub-arc-shaped protrusions 1322 can gradually increase. According to different shapes of the display panel, the shape of the opening, and the size of the distance between the opening and the second hole edge, etc., different interval arrangement methods can be selected, so that the display effect of the area on the side of the second hole edge away from the light-incident surface is more uniform.

[0165] In some examples, as shown in FIG. 15, along the first direction X and in the direction away from the second hole edge H2, the end portion 13210 of the plurality of second sub-protrusions 1321 located on the same side of the second hole edge H2 and close to the first light-out edge S21 has an interval with the first light-out edge S21 that becomes smaller and smaller. Thus, the display effect of the area on the side of the second hole edge H2 away from the light-incident surface S1 is more uniform.

[0166] In some examples, as shown in FIG. 15, along the first direction X, the plurality of second sub-protrusions 1321 located at the same side of the second hole edge H2 includes a farthest second sub-protrusion 13211 farthest from the second hole edge H2 and a nearest second sub-protrusion 13212 nearest to the second hole edge H2. Along the first direction X, the distance D11 between the farthest second sub-protrusion 13211 and the nearest second sub-protrusion 13212 ranges from 0.5mm to 5mm. For example, the distance D11 can be 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, etc.

[0167] In some examples, as shown in FIG. 15, the end of the farthest second sub-protrusion 13211 close to the second light-out edge S22 can extend towards the second light-out edge S22 to be connected with the second light-out edge S22.

[0168] In some examples, as shown in FIG. 15, the plurality of protrusions 130 further includes a plurality of third protrusions 133 and a plurality of fourth protrusions 134. The plurality of third protrusions 133 is located at both sides of the second hole edge H2 along the first direction X and at the side of the second sub-protrusions 1321 away from the second hole edge H2, and each third protrusion 133 extends along the second direction Y. The plurality of fourth protrusions 134 is located at the side of the second hole edge H2 close to the light-in surface S1, and each second protrusion 132 extends along the second direction Y and intersects with the second hole edge H2. The third protrusions 133 and the fourth protrusions 134 on the light-out surface S2 of the light guide plate 100 can conduct and converge the light source on the light-in surface S1 side, thereby improving the light-out brightness and uniformity of the light guide plate 100.

[0169] For example, the two ends of the third protrusion are connected with the light-out edges of the light-out surface respectively. For example, the end of the fourth protrusion away from the second hole edge is connected with the light-out edge of the light-out surface.

[0170] In some examples, as shown in FIG. 15, the first sub-protrusions 1311 of the plurality of first protrusions 131, the second sub-protrusions 1321 of the plurality of second protrusions 132, the plurality of third protrusions 133 and the plurality of fourth protrusions 134 are arranged at equal intervals. Thus, the light-out brightness and uniformity of the light guide plate 100 can be improved better.

[0171] FIG. 16 is another top view of the light-out surface of the light guide plate of FIG. 3. As shown in FIG. 16, the second protrusion 132 includes one second sub-protrusion 1321 and two second sub-arc protrusions 1322. The increase in the number of second sub-arc protrusions 1322 can better improve the brightness of the area where the second protrusion 132 is located.

[0172] For example, as shown in FIG. 16, the ratio of the interval D9 between two adjacent second sub-arc protrusions 1322 to the interval D10 between two adjacent second sub-protrusions 1321 is approximately 1. For example, the ratio of the interval D9 between two adjacent second sub-arc protrusions 1322 to the interval D6 between two adjacent first sub-arc protrusions 1312 is approximately 1.

[0173] In some examples, as shown in FIG. 16, the multiple second sub-arc protrusions 1322 located on the same side of the second hole edge H2 are arranged at equal intervals. Thus, not only the brightness of the area on the side of the second hole edge H2 away from the light incident surface S1 can be improved, but also the brightness of the area where the second sub-arc protrusions 1322 are located can be made more uniform.

[0174] In some examples, as shown in FIG. 16, the end of the two second sub-arc protrusions 1322 of the same second protrusion 132 close to the light incident surface S1 can be connected to the same position of the same second sub-protrusion 1321. For example, the end of the two second sub-arc protrusions 1322 of the same second protrusion 132 close to the light incident surface S1 can be connected to different positions of the same second sub-protrusion 1321.

[0175] FIG. 17 is another top view of the light exit surface S2 of the light guide plate of FIG. 3. As shown in FIG. 17, the second protrusion 132 includes one second sub-protrusion 1321 and three second sub-arc protrusions 1322. The increase in the number of second sub-arc protrusions 1322 can better improve the brightness of the area where the second protrusion 132 is located. It should be noted that in order to more clearly show the structural features of the second protrusion 132, only part of the second protrusion 132 is shown in the figure, and other structural features such as the first protrusion 131 are omitted.

[0176] In some examples, as shown in FIG. 17, the multiple second sub-arc protrusions 1322 located on the same side of the second hole edge H2 are arranged at equal intervals. Thus, not only the brightness of the area on the side of the second hole edge H2 away from the light incident surface S1 can be improved, but also the brightness of the area where the second sub-arc protrusions 1322 are located can be made more uniform.

[0177] In some examples, as shown in FIG. 17, the end of the three second sub-arc protrusions 1322 of the same second protrusion 132 close to the light incident surface S1 can be connected to the same position of the same second sub-protrusion 1321. For example, the end of the three second sub-arc protrusions 1322 of the same second protrusion 132 close to the light incident surface S1 can be connected to different positions of the same second sub-protrusion 1321.

[0178] FIG. 18 is another top view of the light-exit face of the light guide plate of FIG. 3; and FIG. 19 is an enlarged view of a portion of the light-exit face of the light guide plate of FIG. 18. As shown in FIGS. 18 and 19, the hole H includes a second hole edge H2 located on the light-exit face S2, the light-exit face S2 includes a first light-exit edge S21 located on a side of the second hole edge H2 away from the light- entrance face S1, and the light-exit face S2 includes a plurality of protrusions 130. The plurality of protrusions 130 includes a plurality of fifth protrusions 135, a plurality of sixth protrusions 136, a plurality of seventh protrusions 137, and a plurality of eighth protrusions 138.

[0179] The plurality of fifth protrusions 135 extend along the first direction X and are located on both sides of the second hole edge H2 along the first direction X, and one end of the fifth protrusions 135 intersects the second hole edge H2. The plurality of sixth protrusions 136 extend along the first direction X and are located on a side of the second hole edge H2 closer to the first light-exit edge S21, and do not intersect the second hole edge H2. The plurality of seventh protrusions 137 extend along the second direction Y and are located on both sides of the second hole edge H2 along the first direction X. The plurality of eighth protrusions 138 extend along the second direction Y and are located on a side of the second hole edge H2 closer to the first light-exit edge S21, and one end of the eighth protrusions 138 intersects the second hole edge H2. The seventh protrusions 137 intersect the fifth protrusions 135 and the sixth protrusions 136, and the eighth protrusions 138 intersect the sixth protrusions 136.

[0180] By having the seventh protrusions 137 intersect the fifth protrusions 135 and the sixth protrusions 136, and the eighth protrusions 138 intersect the sixth protrusions 136, the backlight on the side of the light-entrance face S1 can be introduced to the side of the second hole edge H2 away from the light-entrance face S1 through the fifth protrusions 135, the sixth protrusions 136, the seventh protrusions 137, and the eighth protrusions 138, thereby improving the brightness of the area on the side of the second hole edge H2 away from the light-entrance face S1, improving the brightness of the display panel at the area, and improving the display effect and display uniformity of the display panel at the area. In addition, the improvement of the brightness of the area by the above-mentioned solution does not involve an increase in material cost, has little effect on manufacturing cost, and does not require the module or the display panel in which the light guide plate is located to increase the avoiding space.

[0181] For example, as shown in FIG. 19, some of the eighth protrusions 138 can also intersect the fifth protrusions 135.

[0182] In some examples, as shown in FIGS. 18 and 19, the light-exit surface S2 further comprises a second light-exit edge S22 and a third light-exit edge S23, which are respectively located on two sides of the second hole edge H2 along the first direction X. One end of the fifth protrusion 135 located between the second hole edge H2 and the second light-exit edge S22 is connected to the second light-exit edge S22. One end of the fifth protrusion 135 located between the second hole edge H2 and the third light-exit edge S23 is connected to the third light-exit edge S23. Two ends of the sixth protrusion 136 are respectively connected to the second light-exit edge S22 and the third light-exit edge S23. Thus, the brightness of the area where the fifth protrusion 135 and the sixth protrusion 136 are located can be improved.

[0183] In some examples, as shown in FIG. 19, the plurality of fifth protrusions 135 are equidistantly arranged. For example, the plurality of sixth protrusions 136 are equidistantly arranged. For example, the plurality of seventh protrusions 137 are equidistantly arranged. For example, the plurality of eighth protrusions 138 are equidistantly arranged. For example, the plurality of protrusions 130 are equidistantly arranged.

[0184] For example, as shown in FIG. 19, the virtual extension line 003 of the fifth protrusion 135 farthest from the first light-exit edge S21 along the second direction passes through the center of the second hole edge H2.

[0185] FIG. 20 is another top view of the light-exit surface of the light guide plate of FIG. 3. FIG. 20(b) is a partial enlarged view of FIG. 20(a), and in order to clearly show the fifth protrusion 135 and the sixth protrusion 136, FIG. 20(b) only shows the fifth protrusion 135 and the sixth protrusion 136, and omits structures such as the seventh protrusion 137 and the eighth protrusion 138.

[0186] As shown in FIGS. 18 and 20, along the second direction Y, the fifth protrusion 135 and the sixth protrusion 136 can also not extend to the second light-exit edge S22 and the third light-exit edge S23, but only need to extend to the peripheral area of the second hole edge H2.

[0187] As shown in FIG. 20, the plurality of fifth protrusions 135 includes a farthest fifth protrusion 1351 farthest from the first light-emitting edge S21, and the plurality of sixth protrusions 136 includes a nearest sixth protrusion 1361 nearest to the first light-emitting edge S21. An end of the farthest fifth protrusion 1351 away from the second hole edge H2 is a first end 135a, which is located between the second hole edge H2 and the second light-emitting edge S22. An end of the farthest fifth protrusion 1351 away from the second hole edge H2 is a second end 135b, which is located between the second hole edge H2 and the third light-emitting edge S23. An end of the nearest sixth protrusion 1361 close to the second light-emitting edge S22 is a third end 136a, and an end of the nearest sixth protrusion 1361 close to the third light-emitting edge S23 is a fourth end 136b. The first virtual connecting line 004 connecting the first end 135a and the third end 136a has an included angle W with the first direction X in the range of 45 degrees to 90 degrees. The second virtual connecting line 005 connecting the second end 135b and the fourth end 136b has an included angle W with the first direction X in the range of 45 degrees to 90 degrees. The fifth protrusions 135 and the sixth protrusions 136 between the farthest fifth protrusion 1351 and the nearest sixth protrusion 1361 are also located in the area defined by the first virtual connecting line 004 and the second virtual connecting line 005. Thus, not only can the brightness in the area defined by the first virtual connecting line 004 and the second virtual connecting line 005 be improved, but also the size of the sixth protrusions 136 and the seventh protrusions 137 is simplified, and the processing technology is simplified.

[0188] For example, as shown in FIG. 20, the minimum distance between the first end 135a and the second hole edge H2 in the first direction X is in the range of 1 mm to 6 mm. For example, the distance can be 2 mm, 3 mm, 4 mm, 5 mm, etc., which is not limited in the embodiments of the present disclosure. For example, the minimum distance between the second end 135b and the second hole edge H2 in the first direction X is in the range of 1 mm to 6 mm. For example, the distance can be 2 mm, 3 mm, 4 mm, 5 mm, etc., which is not limited in the embodiments of the present disclosure.

[0189] In some examples, as shown in FIG. 12, the distance D12 between two adjacent protrusions 130 in the plurality of protrusions 130 is in the range of 25 μm to 100 μm. For example, the distance D12 can be 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, etc. For example, the plurality of protrusions 130 on the light-emitting surface S2 are arranged at equal intervals.

[0190] In some examples, as shown in FIG. 13, the height H of the plurality of protrusions 130 is in the range of 0.3 μm to 2 μm. For example, the height H can be 0.5 μm, 1 μm, 1.5 μm, 1.8 μm, etc. For example, the heights of the plurality of protrusions 130 on the light-emitting surface S2 are equal.

[0191] FIG. 21 is a diagram illustrating the improvement effect of a display panel using the light guide plate according to an embodiment of the present disclosure. The confirmation of the light efficiency of the aperture region of the display panel includes subjective effect and objective data comprehensive evaluation. As shown in (a) of FIG. 21, the objective evaluation standard uses the brightness uniformity of the 1 point of the aperture. The brightness uniformity of the 1 point is the ratio of the lowest brightness of the 1 point to the highest brightness of the 1 point.

[0192] As shown in (b) of FIG. 21, the brightness uniformity of the 1 point of the light guide plate according to the first scheme is shown in (b) of FIG. 21. The brightness uniformity of the 1 point of the light guide plate according to the second scheme is shown in (b) of FIG. 21. Thus, the brightness uniformity of the 1 point of the display panel using the light guide plate according to the present disclosure is all improved to more than 80%.

[0193] As shown in (c) of FIG. 21, the software simulation of the second scheme is shown in (c) of FIG. 21. It can be shown from the diagram that the brightness uniformity of the aperture is improved.

[0194] An embodiment of the present disclosure further provides a backlight module. FIG. 22 is a diagram illustrating a backlight module according to an embodiment of the present disclosure. As shown in FIG. 22, the backlight module 200 includes any of the light guide plates 100 and a light source described above, and the light source is located at one side of the light incident surface of the light guide plate. Thus, the backlight module 200 has the beneficial effects corresponding to the beneficial effects of the light guide plate 100, which will not be described herein again.

[0195] An embodiment of the present disclosure further provides a liquid crystal display panel 300. FIG. 23 is a diagram illustrating a liquid crystal display panel according to an embodiment of the present disclosure. As shown in FIG. 23, the liquid crystal display panel 300 includes any of the backlight modules 200 and a liquid crystal display module 301 described above, and the liquid crystal display module 301 is located at one side of the light exit surface of the light guide plate 100. Thus, the liquid crystal display panel 300 has the beneficial effects corresponding to the beneficial effects of the backlight module 200, which will not be described herein again.

[0196] For example, the liquid crystal display panel 300 can be used in any product or component having a display function, such as a television, a notebook computer, a tablet computer, a mobile phone, a navigation device, a wearable device, a virtual reality device, etc.

[0197] The embodiment of the present disclosure further provides a light guide plate mold for manufacturing the light guide plate. FIG. 24 is a projection schematic view of a light guide plate mold according to an embodiment of the present disclosure; and FIG. 25 is a cross-sectional view of the light guide plate mold of FIG. 24 along the cross-sectional line GG. As shown in FIG. 24 and FIG. 25, the light guide plate mold 400 includes a first surface 410 and a second surface 420 opposite to each other, the first surface 410 includes a plurality of forming grooves 4100 recessed towards the second surface 420 to form the plurality of reflecting elements of the light guide plate in the foregoing at the plurality of forming grooves 4100, each forming groove 4100 includes a first concave surface 4101 and a second concave surface 4102 to form the first convex surface and the second convex surface of the reflecting element in the foregoing at the first concave surface 4101 and the second concave surface 4102. The first concave surface 4101 and the second concave surface 4102 intersect, the maximum distance between the intersection line of the first concave surface 4101 and the second concave surface 4102 and the second surface 420 is a third distance D03, and the maximum distance between the edge of the first concave surface 4101 away from the second concave surface 4102 and the second surface is a fourth distance D04, the third distance D03 is less than the fourth distance D04.

[0198] The light guide plate mold provided by the embodiment of the present disclosure can form the light guide plate in the foregoing, so that the light guide plate mold has the beneficial technical effects corresponding to the beneficial technical effects of the light guide plate in the foregoing, which will not be repeated here.

[0199] In some examples, as shown in FIG. 24 and FIG. 25, the plurality of forming grooves 4100 includes a first forming groove 4100a, the first forming groove 4100a includes three first concave surfaces 4101 and one second concave surface 4102, and the second concave surface 4102 intersects with the three first concave surfaces 4101. Thus, the first reflecting element in the foregoing can be formed at the first forming groove 4100a.

[0200] In some examples, as shown in FIG. 24 and FIG. 25, the shapes of the three first concave surfaces 4101 are substantially the same. For example, the shapes of the three first concave surfaces 4101 in the orthographic projection of the second surface 420 are substantially the same. For example, the three first concave surfaces 4101 are center-symmetric. For example, the second concave surface 4102 is center-symmetric. For example, the forming groove 4100 or the first forming groove 4100a is center-symmetric. Thus, the emitted light of the reflecting element formed by the forming groove can be made more symmetrical and uniform, and the light emission of the light guide plate can be made more uniform.

[0201] In some examples, as shown in FIG. 24 and FIG. 25, the gap between the orthographic projections of the three first concave surfaces 4101 on the second surface 420 overlaps the orthographic projection of the second concave surface 4102 on the second surface 420.

[0202] In some examples, as shown in FIGS. 24 and 25, the first surface 410 further comprises a molding plane 4103, the first concave surface 4101 and the second concave surface 4102 are located on one side of the molding plane 4103 close to the second surface 420, the first concave surface 4101 comprises a first molding edge 4101a located on the molding plane 4103, the first molding edge 4101a comprises a circular arc, and the second concave surface 4102 comprises a plurality of second molding edges 4102a located on the molding plane 4103, the plurality of second molding edges 4102a are located on substantially the same molding virtual circle 006. In this way, the light guide plate described above can be obtained, and the beneficial technical effects thereof are described above and will not be repeated here.

[0203] In some examples, as shown in FIG. 24, the diameter of the molding virtual circle 006 is less than or equal to the diameter of the first molding edge 4101a.

[0204] In some examples, as shown in FIG. 24, the second molding edge 4102a is located between two adjacent first concave surfaces 4101 in the same first molding groove 4100a.

[0205] For example, as shown in FIG. 24, the diameter of the molding virtual circle 006 can be equal to or less than the diameter of the first molding edge 4101a.

[0206] For example, as shown in FIG. 24, the diameter of the first molding edge 4101a is in the range of 40-50 μm. For example, the diameter of the molding virtual circle 006 is in the range of 40-50 μm.

[0207] In some examples, the surface roughness of the first concave surface is less than the surface roughness of the second concave surface. For example, the first concave surface and the second concave surface are formed by different molding processes. For example, the first concave surface can be formed first, and then the second concave surface is formed. For example, the first concave surface can be formed by a point impact process. For example, the second concave surface can be formed by a laser process.

[0208] In some examples, the surface roughness of the first concave surface is in the range of 0-1 μm, and the surface roughness of the second concave surface is in the range of 1-2 μm. For example, the surface roughness described above can be the profile arithmetic mean deviation Ra.

[0209] In some examples, the first molding edge of the first concave surface on the second surface can be continuous. For example, the second molding edge of the second concave surface can be discontinuous. For example, the second molding edge of the second concave surface can be jagged.

[0210] In some examples, as shown in FIGS. 24 and 25, the first profiled edge 4101a of the first concave surface 4101 includes a circular arc in the orthographic projection of the second surface 420, and the length L2 of the edge line 4103 where the first concave surface 4101 intersects the second concave surface 4102 in the orthographic projection of the second surface 420 is not greater than 0.9 times the diameter d2 of the circular arc.

[0211] In some examples, as shown in FIG. 24, the distance D13 between the orthographic projection of the edge line 4103 where the first concave surface 4101 intersects the second concave surface 4102 and the center of the first profiled edge 4101a is not less than 0.6 times the diameter d2 of the circular arc.

[0212] In some examples, as shown in FIG. 24, the distance between the centers of two adjacent first profiled grooves 4100a is not less than 2 times the diameter d2 of the circular arc.

[0213] In the present disclosure, the size and other parameters of the profiled groove can be set with reference to the size and other parameters of the reflective element in the foregoing, and the profiled groove of the light guide plate mold forms the reflective element of the light guide plate, so the size of the reflective element corresponds to the size of the profiled groove, which will not be described again.

[0214] FIG. 26 is another structure of the profiled groove of the light guide plate mold according to an embodiment of the present disclosure. FIG. 26(a) and (b) show two different arrangement modes of the second profiled groove. The cross section along the section line HH of FIG. 26(a) and the cross section along the section line II of FIG. 26(b) are both with reference to FIG. 25, which will not be described again.

[0215] As shown in FIG. 26, the plurality of profiled grooves 4100 further include a second profiled groove 4100b, and the second profiled groove 4100b includes two second concave surfaces 4102 and one first concave surface 4101. Thus, a second reflective element can be formed at the second profiled groove 4100b.

[0216] FIG. 27 is another structure of the profiled groove of the light guide plate mold according to an embodiment of the present disclosure. FIG. 27(a) is a top view of a third profiled groove 4100c; and FIG. 27(b) is a cross-sectional view of the third profiled groove 4100c along the section line JJ.

[0217] As shown in FIG. 27, the plurality of profiled grooves 4100 further include a third profiled groove 4100c, and the third profiled groove 4100c includes one second concave surface 4102 and one first concave surface 4101. Thus, a third reflective element can be formed at the third profiled groove 4100c.

[0218] For example, the same light guide plate mold can include at least one of the first molding groove, the second molding groove, and the second molding groove, and the embodiments of the present disclosure are not limited in this regard. The structure of the light guide plate mold can be designed according to the specific structure of the reflecting element of the light guide plate in the foregoing.

[0219] The embodiments of the present disclosure also provide a manufacturing method of a light guide plate mold. FIG. 28 is a flowchart of a manufacturing method of a light guide plate mold according to an embodiment of the present disclosure. As shown in FIG. 28, the manufacturing method includes the following steps.

[0220] S01: providing a light guide plate mold substrate, the light guide plate mold substrate including a first initial surface and a second surface opposite to each other, the first initial surface including a first preset area;

[0221] S02: forming a plurality of first initial concaves in the first preset area of the first initial surface; and

[0222] S03: forming a plurality of second concaves in the first preset area, the second concaves overlapping the projection of the second surface and the projection of the first initial concaves on the second surface, after the second concaves are formed, the first initial concaves become first concaves and intersect with the second concaves, the first initial surface becomes a first surface, and the light guide plate mold substrate becomes a light guide plate mold.

[0223] The maximum distance between the edge line where the first concave and the second concave intersect and the second surface is a third distance, and the maximum distance between the edge of the first concave away from the second concave and the second surface is a fourth distance, the third distance is less than the fourth distance. For example, the first preset area corresponds to the first reflecting area of the light guide plate in the foregoing. The manufacturing method can form the light guide plate mold in the foregoing, so the manufacturing method has the beneficial technical effects corresponding to the beneficial technical effects of the light guide plate mold, which will not be described here.

[0224] FIG. 29 is a schematic diagram of a partial structure of a light guide plate mold formed according to the manufacturing method of the present disclosure. FIG. 29(a) shows a schematic top view of the first initial concave 41010, and FIG. 29(b) shows a schematic cross-sectional view of the first initial concave 41010. As shown in FIG. 29, a plurality of first initial concaves 41010 are formed in the first preset area of the first initial surface 4100. For example, as shown in FIG. 29, at least part of the first initial concaves 4102 of the plurality of first initial concaves 4102 are tangent to each other.

[0225] For example, the first initial concave can be formed by a point striking process. For example, the second concave can be formed by a laser process.

[0226] In some examples, the first initial surface further comprises a second preset area at least partially surrounding the first preset area, and the manufacturing method further comprises: forming a plurality of third concaves in the second preset area of the first initial surface. For example, the third concaves and the first initial concaves are formed by the same forming process.

[0227] For example, the second preset area corresponds to a second reflection area of the light guide plate, and the plurality of third concaves are formed in the second preset area of the first initial surface to form reflection dots of the light guide plate at the third concaves. For example, the third concaves have the same parameters such as size and shape as the first initial concaves, which will not be repeated here.

[0228] The following points need to be explained:

[0229] (1) In the drawings of the embodiments of the present disclosure, only the structures related to the embodiments of the present disclosure are involved, and other structures can be referred to the general design.

[0230] (2) In the case of no conflict, the features in the same embodiment and different embodiments of the present disclosure can be combined with each other.

[0231] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A light guide plate comprising a light incident surface, a light exit surface intersecting the light incident surface, and a reflection surface disposed opposite to the light exit surface, and further comprising an opening, wherein the opening comprising a first hole edge located at the reflection surface, the reflection surface comprising a first reflection region located at a side of the first hole edge away from the light incident surface, a projection of the first hole edge on the light incident surface falling within a projection of the first reflection region on the light incident surface, the reflection surface comprising a plurality of reflection elements in the first reflection region, each of the reflection elements comprising a first convex surface and a second convex surface protruding away from the light exit surface, the first convex surface and the second convex surface intersecting each other, a maximum distance between a line of intersection of the first convex surface and the second convex surface and the light exit surface being a first distance, a maximum distance between an edge of the first convex surface away from the second convex surface and the light exit surface being a second distance, the first distance being greater than the second distance, and / or the opening further comprising a second hole edge located at the light exit surface, the light exit surface comprising a plurality of protrusions, the plurality of protrusions comprising a plurality of first protrusions, each of the first protrusions comprising a pair of first sub-protrusions and a first sub-arc protrusion, the pair of first sub-protrusions being located at two sides of the second hole edge in a first direction respectively, the pair of first sub-protrusions extending in a second direction, the first direction being parallel to the light incident surface, the second direction being parallel to the light exit surface and perpendicular to the first direction, a virtual line passing through the second hole edge and parallel to the first direction at an end of the first sub-protrusion away from the light incident surface, the first sub-arc protrusion having two ends connected to the pair of first sub-protrusions respectively, the first sub-arc protrusion being located at a side of the second hole edge away from the light incident surface, the first sub-arc protrusions of the plurality of first protrusions being spaced apart.

2. The light guide plate according to claim 1, wherein the opening comprising a first hole edge located at the reflection surface, the reflection surface comprising a first reflection region located at a side of the first hole edge away from the light incident surface, a projection of the first hole edge on the light incident surface falling within a projection of the first reflection region on the light incident surface, the reflection surface comprising a plurality of reflection elements in the first reflection region, each of the reflection elements comprising a first convex surface and a second convex surface protruding away from the light exit surface, the first convex surface and the second convex surface intersecting each other, a maximum distance between a line of intersection of the first convex surface and the second convex surface and the light exit surface being a first distance, a maximum distance between an edge of the first convex surface away from the second convex surface and the light exit surface being a second distance, the first distance being greater than the second distance.

3. The light guide plate according to claim 2, wherein the plurality of reflection elements comprising a first reflection element, the first reflection element comprising three first convex surfaces and one second convex surface, the second convex surface intersecting each of the three first convex surfaces.

4. The light guide plate according to claim 3, wherein a gap between projections of the three first convex surfaces on the light exit surface overlapping a projection of the second convex surface on the light exit surface.

5. The light guide plate of claim 3, wherein, The reflective surface further comprises a reflective plane, the first convex surface and the second convex surface are located on a side of the reflective plane away from the light exit surface, the first convex surface comprises a first edge located on the reflective plane, the first edge comprises a first circular arc, the second convex surface comprises a plurality of second edges located on the reflective plane, the plurality of second edges are approximately located on the same virtual circle.

6. The light guide plate according to claim 5, wherein The virtual circle is equidistant from the center of the orthographic projection of the light exit surface and the first edges of the three first convex surfaces.

7. The light guide plate of claim 5, wherein, The diameter of the virtual circle is less than or equal to the diameter of the first edge.

8. The light guide plate of claim 2, wherein, The plurality of reflective elements comprises a second reflective element, the second reflective element comprises two first convex surfaces and one second convex surface, and the second convex surface intersects with the two first convex surfaces.

9. The light guide plate according to claim 8, wherein The gap between the orthographic projections of the two first convex surfaces on the light exit surface overlaps with the orthographic projection of the second convex surface on the light exit surface.

10. The light guide plate of claim 2, wherein, The plurality of reflective elements comprises a third reflective element, the third reflective element comprises one first convex surface and one second convex surface.

11. The light guide plate according to any one of claims 2 to 10, wherein The surface roughness of the first convex surface is less than the surface roughness of the second convex surface.

12. The light guide plate according to any one of claims 2 to 7, wherein The edge of the first convex surface in the orthographic projection of the light exit surface comprises a second circular arc, and the length of the edge line of the first convex surface intersecting with the second convex surface in the orthographic projection of the light exit surface is not greater than 0.9 times the diameter of the second circular arc.

13. The light guide plate of claim 12, wherein, The distance between the edge line of the first convex surface intersecting with the second convex surface in the orthographic projection of the light exit surface and the center of the second circular arc is not less than 0.6 times the diameter of the second circular arc.

14. The light guide plate of claim 12, wherein, The centers of the orthographic projections of the second convex surfaces of two adjacent reflective elements are not less than 2 times the diameter of the second circular arc.

15. The light guide plate of claim 14, wherein, The minimum distance between two adjacent reflective elements is greater than or equal to zero.

16. The light guide plate according to any one of claims 2 to 15, wherein In the first reflective area, the reflective surface further comprises reflective dots, the reflective dots comprise third convex surfaces protruding away from the light exit surface, The minimum distance between adjacent reflective dots and reflective elements is greater than or equal to zero, and / or The minimum distance between two adjacent reflective dots is greater than or equal to zero.

17. The light guide plate of claim 16, wherein, The roughness of the first convex surface of the reflective element is approximately equal to the roughness of the third convex surface of the reflective dot.

18. The light guide plate of claim 16, wherein, In the first reflective area, the ratio of the number of second convex surfaces to the sum of the number of first convex surfaces and third convex surfaces is in the range of 1 / 9 to 1 / 3.

19. The light guide plate of claim 16, wherein, The edge of the reflective dot in the orthographic projection of the light exit surface comprises a circle, the edge of the first convex surface in the orthographic projection of the light exit surface comprises a second circular arc, and the diameter of the edge of the third convex surface in the orthographic projection of the light exit surface is equal to the diameter of the edge of the first convex surface in the orthographic projection of the light exit surface.

20. The light guide plate according to any one of claims 2 to 19, wherein The reflective surface further comprises a second reflective area surrounding at least part of the first reflective area, in the second reflective area, the reflective surface comprises a plurality of reflective dots, the reflective dots comprise third convex surfaces protruding away from the light exit surface, and the minimum distance between two adjacent third convex surfaces is greater than or equal to zero.

21. The light guide plate according to any one of claims 2 to 20, wherein An edge of the first convex surface comprises a second circular arc in the orthographic projection of the light-exit surface, a diameter of the second circular arc ranges from 40 microns to 50 microns, A center distance of the second convex surfaces of two adjacent reflective elements in the orthographic projection of the light-exit surface ranges from 80 microns to 100 microns.

22. The light guide plate according to any one of claims 1 to 21, wherein The opening comprises a second hole edge of the light-exit surface, the light-exit surface comprises a plurality of protrusions, the protrusions protrude away from the reflective surface, the plurality of protrusions comprises a plurality of first protrusions, Each of the first protrusions comprises a pair of first sub-protrusions and a first sub-arc-shaped protrusion, in a first direction, two first sub-protrusions of the pair of first sub-protrusions are located on two sides of the second hole edge respectively, the pair of first sub-protrusions extends in a second direction, A virtual line parallel to the first direction and passing through the end of the first sub-protrusion away from the light-entrance surface passes through the second hole edge, two ends of the first sub-arc-shaped protrusion are connected to the ends of the pair of first sub-protrusions away from the light-entrance surface respectively, the first sub-arc-shaped protrusion is located on a side of the second hole edge away from the light-entrance surface, and the first sub-arc-shaped protrusions of the plurality of first protrusions are arranged at intervals.

23. The light guide plate of claim 22, wherein, The plurality of first sub-protrusions located on the same side of the second hole edge are arranged at equal intervals, and a ratio of a distance between two adjacent second sub-arc-shaped protrusions to a distance between two adjacent second sub-protrusions ranges from 0.25 to 4.

24. The light guide plate of claim 23, wherein, The first sub-arc-shaped protrusion of the first protrusion is tangent to the pair of first sub-protrusions.

25. The light guide plate of claim 22, wherein, In the first direction, the plurality of first sub-protrusions comprises a farthest first sub-protrusion farthest from the second hole edge, and a distance between the farthest first sub-protrusion and the second hole edge ranges from 1 mm to 3 mm in the first direction.

26. The light guide plate of claim 22, wherein, The light-exit surface further comprises a first light-exit edge located on a side of the second hole edge away from the light-entrance surface, and the plurality of protrusions further comprises a plurality of second protrusions, Each of the second protrusions comprises a second sub-protrusion and a second sub-arc-shaped protrusion, in the first direction, the second sub-protrusion is located on a side of the first sub-protrusion away from the second hole edge, an end of the second sub-protrusion close to the first light-exit edge is closer to the first light-exit edge than an end of the first sub-protrusion close to the first light-exit edge, one end of the second sub-arc-shaped protrusion is connected to the end of the second sub-protrusion close to the first light-exit edge, the other end of the second sub-arc-shaped protrusion is connected to the first light-exit edge, and a curvature center of the second sub-arc-shaped protrusion is located on a side of the second sub-arc-shaped protrusion close to the second hole edge, and the second sub-arc-shaped protrusions of the plurality of second protrusions are arranged at intervals.

27. The light guide plate of claim 26, wherein, The plurality of second sub-protrusions located on the same side of the second hole edge are arranged at equal intervals, and a ratio of a distance between two adjacent second sub-arc-shaped protrusions to a distance between two adjacent second sub-protrusions ranges from 0.25 to 4.

28. The light guide plate of claim 26, wherein, The end of the second sub-protrusion close to the first light-emitting edge is closer to the first light-emitting edge than the end of the second sub-protrusion far from the first light-emitting edge.

29. The light guide plate of claim 26, wherein, The second protrusion comprises a second sub-protrusion and a plurality of second sub-arc-shaped protrusions, and the plurality of second sub-arc-shaped protrusions are arranged at equal intervals on the same side of the second hole edge.

30. The light guide plate of claim 26, wherein, Along the first direction, the plurality of second sub-protrusions on the same side of the second hole edge comprises a farthest second sub-protrusion farthest from the second hole edge and a nearest second sub-protrusion closest to the second hole edge, and the distance between the farthest second sub-protrusion and the nearest second sub-protrusion along the first direction ranges from 0.5mm to 5mm.

31. The light guide plate of claim 26, wherein, The plurality of protrusions further comprises a plurality of third protrusions and a plurality of fourth protrusions, The plurality of third protrusions are located on both sides of the second hole edge along the first direction and on the side of the second sub-protrusion away from the second hole edge, and each third protrusion extends along the second direction, The plurality of fourth protrusions are located on the side of the second hole edge close to the light-incident surface, and each second protrusion extends along the second direction and intersects with the second hole edge, The first sub-protrusions of the plurality of first protrusions, the second sub-protrusions of the plurality of second protrusions, the plurality of third protrusions, and the plurality of fourth protrusions are arranged at equal intervals.

32. The light guide plate according to any one of claims 1 to 21, wherein The opening comprises a second hole edge on the light-emitting surface, the light-emitting surface comprises a first light-emitting edge, the first light-emitting edge is located on the side of the second hole edge away from the light-incident surface, and the light-emitting surface comprises a plurality of protrusions, the plurality of protrusions comprises: a plurality of fifth protrusions extending along the first direction, located on both sides of the second hole edge along the first direction, and one end of the fifth protrusion intersects with the second hole edge; a plurality of sixth protrusions extending along the first direction, located on the side of the second hole edge close to the first light-emitting edge, and not intersecting with the second hole edge; a plurality of seventh protrusions extending along the second direction, located on both sides of the second hole edge along the first direction; and a plurality of eighth protrusions extending along the second direction, located on the side of the second hole edge close to the first light-emitting edge, and one end of the eighth protrusion intersects with the second hole edge, wherein the seventh protrusion intersects with the fifth protrusion and the sixth protrusion, and the eighth protrusion intersects with the sixth protrusion.

33. The light guide plate of claim 32, wherein, The light-emitting surface further comprises a second light-emitting edge and a third light-emitting edge, and the second light-emitting edge and the third light-emitting edge are respectively located on both sides of the second hole edge along the first direction, one end of the fifth protrusion located between the second hole edge and the second light-emitting edge is connected to the second light-emitting edge, and one end of the fifth protrusion located between the second hole edge and the third light-emitting edge is connected to the third light-emitting edge, both ends of the sixth protrusion are connected to the second light-emitting edge and the third light-emitting edge, respectively.

34. The light guide plate of claim 33, wherein, In the second direction, the plurality of fifth protrusions includes a farthest fifth protrusion farthest from the first light-out edge, and the plurality of sixth protrusions includes a nearest sixth protrusion nearest to the first light-out edge, an end of the farthest fifth protrusion away from the second hole edge is a first end, and an end of the farthest fifth protrusion away from the third light-out edge is a second end, an end of the nearest sixth protrusion away from the second light-out edge is a third end, and an end of the nearest sixth protrusion away from the third light-out edge is a fourth end, an angle between a first virtual line connecting the first end and the third end and the first direction is in a range of 45 degrees to 90 degrees, and an angle between a second virtual line connecting the second end and the fourth end and the first direction is in a range of 45 degrees to 90 degrees, fifth protrusions and sixth protrusions between the farthest fifth protrusion and the nearest sixth protrusion are also located in an area defined by the first virtual line and the second virtual line.

35. The light guide plate of claim 22, wherein, a distance between two adjacent protrusions in the plurality of protrusions is in a range of 25 μm to 100 μm, and a height of the plurality of protrusions is in a range of 0.3 μm to 2 μm.

36. A backlight module comprising the light guide plate according to any one of claims 1-35 and a light source located on a side of the light-in surface of the light guide plate.

37. A liquid crystal display panel comprising the backlight module according to claim 36 and a liquid crystal display module located on a side of the light-out surface of the light guide plate.

38. A light guide plate mold for manufacturing the light guide plate according to claim 2, comprising a first surface and a second surface opposite to each other, wherein, the first surface includes a plurality of shaped grooves recessed toward the second surface to form the plurality of reflective elements of the light guide plate, each of the shaped grooves includes a first concave surface and a second concave surface to form the first convex surface and the second convex surface of the reflective element at the first concave surface and the second concave surface, the first concave surface and the second concave surface intersect, a maximum distance between an edge where the first concave surface and the second concave surface intersect and the second surface is a third distance, and a maximum distance between an edge of the first concave surface away from the second concave surface and the second surface is a fourth distance, the third distance being smaller than the fourth distance.

39. The light guide plate mold of claim 38, wherein, the plurality of shaped grooves includes a first shaped groove, the first shaped groove including three first concave surfaces and one second concave surface, the second concave surface intersecting each of the three first concave surfaces.

40. The light guide plate mold of claim 39, wherein, the first surface further includes a shaped plane, the first concave surface and the second concave surface being located on a side of the shaped plane close to the second surface, the first concave surface including a first shaped edge on the shaped plane, the first shaped edge including a circular arc, and the second concave surface including a plurality of second shaped edges on the shaped plane, the plurality of second shaped edges being substantially located on a same shaped virtual circle.

41. The light guide plate mold of claim 40, wherein, a diameter of the shaped virtual circle is smaller than or equal to a diameter of the first shaped edge.

42. The light guide plate mold of claim 38, wherein, The plurality of shaped grooves further comprises a second shaped groove comprising two of the second concave surfaces and one of the second concave surfaces, and / or The plurality of shaped grooves further comprises a third shaped groove comprising one of the second concave surfaces and one of the second concave surfaces. 43.A method for manufacturing a light guide plate mold, comprising: providing a light guide plate mold substrate, wherein the light guide plate mold substrate comprises a first initial surface and a second surface opposite to each other, the first initial surface comprises a first preset area; forming a plurality of first initial concave surfaces in the first preset area of the first initial surface; forming a plurality of second concave surfaces in the first preset area, wherein the second concave surfaces overlap the first initial concave surfaces in the projection of the second surface, after forming the second concave surfaces, the first initial concave surfaces become the first concave surfaces and intersect with the second concave surfaces, the first initial surface becomes a first surface, and the light guide plate mold substrate becomes a light guide plate mold, wherein the maximum distance between the edge line where the first concave surfaces and the second concave surfaces intersect and the second surface is a third distance, and the maximum distance between the edge of the first concave surfaces away from the second concave surfaces and the second surface is a fourth distance, the third distance is less than the fourth distance.

44. The method of manufacturing according to claim 43, wherein, At least some of the first initial concave surfaces are tangent to each other.

45. The method of manufacturing according to claim 43, wherein, The first initial surface further comprises a second preset area at least partially surrounding the first preset area, and the method further comprises: forming a plurality of third concave surfaces in the second preset area of the first initial surface, wherein the third concave surfaces and the first initial concave surfaces are formed by the same forming process.

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