Light guide plate, display device and manufacturing method of light guide plate

Abstract

The invention discloses a light guide plate, a display device and a manufacturing method of the light guide plate. The light guide plate comprises a main body part and a plurality of lattice points. The main body part comprises a first surface, a second surface and a light incident surface, the second surface is opposite to the first surface, and the light incident surface is connected with the first surface and the second surface. The plurality of lattice points are arranged on the first surface, and each lattice point comprises a protruding structure and an embedded structure. The protruding structure is located on the first side of the first surface, the embedded structure is located on the second side of the first surface, and the second side is opposite to the first side and is the side, closer to the second surface, of the first surface.

Description

Technical Field

[0001] The present invention relates to a light guide plate, and in particular to a light guide plate comprising a plurality of grid points, a display device used therein, and a method for manufacturing the light guide plate. Background Art

[0002] Light guide plates are widely used in various display devices with light sources, such as notebooks, smart phones, wearable devices, smart watches, and car displays. Light guide plates can be designed with various types of dots, such as laser dots or etched dots, to adjust the light transmission effect. Depending on the product, there will be different requirements for the light guide effect of the light guide plate, and there are higher expectations for its more diversified functions. Therefore, the structural design of the light guide plate is still one of the important topics today. Summary of the invention

[0003] One of the purposes of the present invention is to provide a light guide plate, a display device used therein and a method for manufacturing the light guide plate. By designing the structure of the main body and the dots of the light guide plate, an effective light guiding effect can be achieved and the surface of the light guide plate can have paper-like functions.

[0004] To achieve the above-mentioned purpose, the present invention provides a light guide plate, including a main body and a plurality of mesh points. The main body includes a first surface, a second surface and a light incident surface, the second surface is opposite to the first surface, and the light incident surface connects the first surface and the second surface. A plurality of mesh points are arranged on the first surface, and each mesh point includes a protruding structure and an embedded structure. The protruding structure is located on a first side of the first surface, and the embedded structure is located on a second side of the first surface, wherein the second side is opposite to the first side and is a side of the first surface closer to the second surface.

[0005] To achieve the above object, the present invention provides a display device, including a display panel and a front light module. The front light module is arranged on the display panel, and the front light module includes the light guide plate and the light emitting element as described above. The light emitting element is arranged corresponding to the light incident surface, and the light generated by the light emitting element is incident on the light guide plate from the light incident surface.

[0006] To achieve the above-mentioned purpose, the present invention provides a method for manufacturing a light guide plate, comprising: providing a main body; forming a plurality of depressions on a first surface of the main body; forming a first material layer in the plurality of depressions to form a plurality of embedded structures, wherein the upper surface of each embedded structure is flush with the first surface; and forming a second material layer on the first surface at positions corresponding to the plurality of depressions to form a plurality of protruding structures. Each protruding structure corresponds to one of the plurality of embedded structures and together forms a dot.

[0007] According to the light guide plate, the display device used therein and the method for manufacturing the light guide plate according to the embodiments of the present invention, through the structural design of the main body and the dots of the light guide plate, its embedded structure can achieve the function of guiding light, and the raised structure can make the surface of the light guide plate have paper-like functions and provide a protective effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a partial cross-sectional schematic diagram of a light guide plate and a light emitting element used in combination according to an embodiment of the present invention.

[0009] Figure 2 The diagram is a top view of a light guide plate and a light emitting element used in combination according to an embodiment of the present invention.

[0010] Figure 3 FIG. 4 is a three-dimensional schematic diagram of dots of a light guide plate according to an embodiment of the present invention.

[0011] Figure 4 for Figure 3 A schematic cross-sectional view of the network point shown.

[0012] Figure 5 for Figure 3 Schematic diagram of the rear view of the network points shown.

[0013] Figure 6 FIG. 4 is a cross-sectional schematic diagram of a protruding structure of a dot according to an embodiment of the present invention.

[0014] Figure 7 It is a partial cross-sectional schematic diagram of a light guide plate and a light emitting element used in combination according to an embodiment of the present invention.

[0015] Figure 8 for Figure 7 The schematic top view and the schematic cross-sectional view of the main body of the light guide plate are shown.

[0016] Fig. 9 FIG. 1 is a schematic diagram of a dot configuration structure of a light guide plate according to an embodiment of the present invention.

[0017] Fig.10 FIG. 1 is a schematic diagram of the structure of a display device according to an embodiment of the present invention.

[0018] Fig.11 The figure is a flow chart of the steps of a method for manufacturing a light guide plate according to an embodiment of the present invention.

[0019] Figures 12 to 15 FIG. 4 is a schematic diagram of a manufacturing process of a light guide plate according to an embodiment of the present invention.

[0020] Explanation of reference numerals: 100-main body; 101, 102-end; 103-end; 104-center; 110-first surface; 110a-first side; 110b-second side; 120-second surface; 130-light incident surface; 200-dot; 210-convex structure; 212-base; 214-convex portion; 220-embedded structure; 221-upper surface; 222-lower surface; 223-first side surface; 224-second side surface; 300, 310-imprinting mold; a1-first angle; a2-second angle; a3-third angle; a4-fourth angle; BD-reference direction; BS-reference plane; C1-first corner; C2-second corner; C3-third corner; C4-fourth corner; D-diameter; D1, D2, D3, D4-long axis direction; DD-display device; DL-display medium layer; D P-display panel; EL-light-emitting element; EU-electronic unit; FLM-front light module; FR, FR1, FR2, FR3, FR4, FR5, FR6, FR7, FR8-blocks; GC-geometric center; GR-recess; H1, H2, T1, T2, T3, T4-thickness; L, LGL-length; LG-light guide plate; LT-light; M1-first material layer; M2-second material layer; P1-first part; P2-second part; P3-third part; P4-fourth part; POL-polarizer; R1-first area; R2-second area; R3-third area; R4-fourth area; S100, S200, S300, S400-steps; SB1-first substrate; SB2-second substrate; W, LGW-width; X, Y, Z-direction; θ1, θ2, θ3, θ4-angle. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to further understand the present invention, the preferred embodiments of the present invention are listed below, and the components of the present invention and the effects to be achieved are described in detail with the accompanying drawings. It should be noted that the drawings are simplified schematic diagrams, and therefore, only the components and combination relationships related to the present invention are shown to provide a clearer description of the basic architecture or implementation method of the present invention, while the actual components and layout may be more complex. In addition, for the convenience of explanation, the components shown in the drawings of the present invention are not drawn in proportion to the actual number, shape, and size, and the detailed proportions can be adjusted according to the design requirements.

[0022] In the following description and claims, words such as "include", "contain", "have" and the like are open-ended words, and therefore should be interpreted as "including but not limited to..." Therefore, when the terms "include", "contain" and / or "have" are used in the description of the present invention, they specify the existence of corresponding features, regions, steps, operations and / or components, but do not exclude the existence of one or more corresponding features, regions, steps, operations and / or components.

[0023] The ordinal numbers used in the specification and claims, such as "first", "second", etc., are used to modify the elements. They do not imply or represent any previous ordinal numbers of the elements, nor do they represent the order of one element to another element, or the order of the manufacturing method. The use of these ordinal numbers is only used to make the element with a certain name clearly distinguishable from another element with the same name. The claims and the specification may not use the same words. Accordingly, the first component in the specification may be the second component in the claims.

[0024] It should be noted that the following embodiments can replace, reorganize, or mix features in several different embodiments to complete other embodiments without departing from the spirit of the present invention. The features between the embodiments can be mixed and matched as long as they do not violate the spirit of the invention or conflict with each other.

[0025] Please refer to Figure 1 , Figure 2 and Figure 3 . Figure 1 It is a partial cross-sectional schematic diagram of a light guide plate and a light emitting element used in combination according to an embodiment of the present invention. Figure 2 FIG. 1 is a top view schematic diagram of a light guide plate and a light emitting element used in combination according to an embodiment of the present invention, wherein Figure 1 Can be along Figure 2 Sectional view along line A-A'. Figure 3 FIG. 1 is a three-dimensional schematic diagram of the dots of a light guide plate according to an embodiment of the present invention. Figure 1 , Figure 2 and Figure 3 As shown, the light guide plate LG includes a main body 100 and a plurality of dots 200. The main body 100 includes a first surface 110, a second surface 120 and a light incident surface 130. The second surface 120 is opposite to the first surface 110, and the light incident surface 130 connects the first surface 110 and the second surface 120. In other words, the light incident surface 130 serves as a side surface connecting the first surface 110 and the second surface 120 that are opposite to each other in a direction Z, wherein the direction Z may be parallel to the normal direction of the second surface 120. The light incident surface 130 may be used to be arranged corresponding to at least one light emitting element EL, and the light generated by the light emitting element EL may be incident into the light guide plate LG via the light incident surface 130, Figure 2In the embodiment, three light-emitting elements EL are arranged corresponding to the light incident surface 130, but the present invention is not limited thereto. The light-emitting element EL may be, for example, a light-emitting diode (LED) or other suitable light-emitting element. The light guide plate LG and one or more light-emitting elements EL arranged corresponding to the light incident surface 130 of the light guide plate LG may be used as a light source in a display device, for example, as a front light module (e.g., a front light module) of the display device. Fig.10 shown).

[0026] A plurality of dots 200 of the light guide plate LG are disposed on the first surface 110, and each dot 200 includes a protruding structure 210 and an embedded structure 220. The protruding structure 210 is located on the first side 110a of the first surface 110, and the embedded structure 220 is located on the second side 110b of the first surface 110, wherein the second side 110b is opposite to the first side 110a and is the side of the first surface 110 closer to the second surface 120, and the first side 110a is the outer side of the first surface 110. Specifically, the extension of the plane where the first surface 110 is located may be a reference plane BS, a side higher than the reference plane BS in the normal direction of the reference plane BS is the first side 110a, and a side lower than the reference plane BS in the normal direction of the reference plane BS is the second side 110b. Figure 2 As shown, the plurality of dots 200 may be arranged in an array, for example, arranged in an array at equal intervals. That is, the plurality of dots 200 may be arranged in a plurality of horizontal rows extending along a direction X, and the horizontal rows are arranged side by side along a direction Y, wherein the directions X and Y may be perpendicular to each other and perpendicular to the direction Z at the same time, and the direction X may be a horizontal direction and perpendicular to the normal direction of the second surface 120.

[0027] In the present invention, the refractive indexes of any two of the main body 100, the protruding structure 210 and the embedded structure 220 are different, that is, the main body 100, the protruding structure 210 and the embedded structure 220 have different refractive indices. The refractive index of the main body 100 can range from 1.4 to 1.6, the refractive index of the protruding structure 210 can range from 1.61 to 1.81, and the refractive index of the embedded structure 220 can range from 1.5 to 1.65. The embedded structure 220 of the dot 200 can make the light (e.g. Figure 1 The light LT) shown in the figure produces reflection and / or refraction, so that the light entering the light guide plate LG is reflected and / or refracted and emitted from the light guide plate LG from the second surface 120 to achieve the light guiding effect, and the protruding structure 210 of the dot 200 can make the surface of the light guide plate LG have paper-like functions and provide a protective effect.

[0028] The following will describe the structural design of the protruding structure 210 and the embedded structure 220 of the dot 200. Figure 3 and Figure 4 , and cooperate with Figure 1 and Figure 2 . Figure 4 for Figure 3 A schematic cross-sectional view of the network point shown, for example Figure 4 Can be along Figure 3 The cross-sectional view of the BB' section line, and Figure 4 Can Figure 1 The local enlarged schematic diagram of the network point is shown. Figure 3 and Figure 4 As shown, in the cross-sectional profile of the mesh point 200, the embedded structure 220 may include an upper surface 221, a lower surface 222, a first side surface 223, and a second side surface 224. The upper surface 221 is flush with the first surface 110 of the main body 100 (eg, Figure 1 As shown in FIG. 2 , the lower surface 222 is opposite to the upper surface 221, the first side surface 223 connects the upper surface 221 and the lower surface 222, and the second side surface 224 is opposite to the first side surface 223 and connects the upper surface 221 and the lower surface 222, wherein the first side surface 223 is closer to the light incident surface 130 of the main body 100 than the second side surface 224. That is, in the direction X, the distance between the first side surface 223 and the light incident surface 130 is smaller than the distance between the second side surface 224 and the light incident surface 130. According to Figure 4 In the illustrated embodiment, the angle θ1 between the first side surface 223 and the upper surface 221 may range from 30 to 60 degrees (i.e., 30°≤θ1≤60°), the angle θ2 between the first side surface 223 and the lower surface 222 may range from 113 to 143 degrees (i.e., 113°≤θ2≤143°), the angle θ3 between the second side surface 224 and the upper surface 221 may range from 90 degrees, and the angle θ4 between the second side surface 224 and the lower surface 222 may range from 97 to 100 degrees (i.e., 97°≤θ4≤100°). For example, the angle θ1 may be 60 degrees, the angle θ2 may be 113 degrees, and the angle θ4 may be 97 degrees, but the present invention is not limited thereto.

[0029] Please refer to Figure 3 , Figure 4 and Figure 5 , and cooperate with Figure 1 and Figure 2 . Figure 5 for Figure 3 The rear view of the network point is shown in Figure 1. Figure 3 , Figure 4 and Figure 5 As shown, the projection shape of the protrusion structure 210 of the dot 200 on the first surface 110 may be a circle (eg Figure 2) and has a diameter D, the embedded structure 220 of the dot 200 has a length L in the direction X and a width W in the direction Y. The ratio of the length L of the embedded structure 220 to the diameter D of the protruding structure 210 ranges from 0.89 to 1.48 (i.e., 0.89≤L / D≤1.48), and the ratio of the width W of the embedded structure 220 to the length L of the embedded structure 220 ranges from 0.79 to 1 (i.e., 0.79≤W / L≤1). For example, the diameter D of the protruding structure 210 may be 0.48 millimeters (mm), the length L of the embedded structure 220 may be 0.708 millimeters, and the width W of the embedded structure 220 may be 0.56 millimeters, but the present invention is not limited thereto. The protrusion structure 210 may include a base 212 and a protrusion 214, wherein the protrusion 214 is disposed on the base 212 and has a curved surface 214S, and the geometric centers GC of the projection shapes of the base 212 and the protrusion 214 on the first surface 110 overlap with each other (eg, Figure 2 In addition, the geometric centers GC of the projection shapes of the protruding structures 210 and the embedded structures 220 on the first surface 110 also overlap with each other.

[0030] Please refer to Figure 6 , which is a cross-sectional schematic diagram of a raised structure of a dot according to an embodiment of the present invention. Figure 6 In the embodiment shown, the projection shape of the base 212 of the protrusion structure 210 on the first surface 110 may be a circle (eg Figure 2 ) and has a diameter D, wherein the diameter D of the base 212 is the diameter D of the aforementioned protruding structure 210. The diameter D of the base 212 may be twelve times the thickness H1 of the base 212 in the direction Z, that is, the thickness H1 may be one twelfth of the diameter D. Moreover, the thickness H2 of the protruding structure 210 as a whole in the direction Z may be three times the thickness H1 of the base 212, and the radius of curvature R of the curved surface 214S of the protruding portion 214 may be twice the thickness H1 of the base 212. For example, the diameter D of the protruding structure 210 may be 0.48 mm, the thickness H1 of the base 212 may be 0.04 mm, the thickness H2 of the protruding structure 210 may be 0.12 mm, and the radius of curvature R of the curved surface 214S may be 0.08 mm, but the present invention is not limited thereto.

[0031] Can have Figure 6 The light guide plate LG of the convex structure 210 shown is applied to a display device (eg Fig.10In the display device DD shown in the figure. When the display device displays a white picture, the glossiness of the display device ranges from 0.7 to 0.8 gloss units (GU) at an angle of 20 degrees, ranges from 1.0 to 1.1 gloss units at an angle of 60 degrees, and ranges from 1.1 to 1.2 gloss units at an angle of 85 degrees. When the display device displays a black picture, the glossiness of the display device is 0 gloss units at an angle of 20 degrees, 0 gloss units at an angle of 60 degrees, and 1.1 gloss units at an angle of 85 degrees. According to the structure and glossiness design of the above-mentioned protruding structure 210, the surface of the light guide plate LG and / or the display screen of the display device to which it is applied can have a paper-like effect.

[0032] When the diameter D of the protruding structure 210 is larger, the value of the gloss unit is higher, and the glossiness is higher. The "gloss" described in the present invention refers to a physical quantity that quantifies the ability of a material surface to reflect light under a set of geometric conditions, which describes the reflective property with direction selection. The glossiness of the surface of an object can be measured by a gloss meter to obtain gloss units at different angles (e.g., 20 degrees, 60 degrees, and 85 degrees), wherein the standard specifications of the gloss meter at different angles can be, for example, referenced to DIN-67530, ISO-2813, ASTM-D2457, GB 9754, GB 8807, ISO-8254 and / or ASTM-D523, etc., but is not limited thereto.

[0033] Please refer to Figure 7 and Figure 8 . Figure 7 It is a partial cross-sectional schematic diagram of a light guide plate and a light emitting element used in combination according to an embodiment of the present invention. Figure 8 for Figure 7 The schematic top view and cross-sectional view of the main body of the light guide plate are shown, wherein the cross-sectional view along the AA' section line of the top view is shown on the lower side of the top view of the main body, and the cross-sectional view along the BB' section line of the top view is shown on the right side of the top view of the main body. Figure 7 and Figure 8 As shown, the main body 100 of the light guide plate LG may have a thickness variation in direction Z along directions X and Y to enhance the light guiding effect. Figure 8 As shown in the cross-sectional view on the lower left side, the thickness T1 of the end 101 of the main body 100 adjacent to the light incident surface 130 in the direction Z may be less than the thickness T2 of the end 102 of the main body 100 away from the light incident surface 130 in the direction Z. Along the direction X, the thickness of the main body 100 in the direction Z may present a linear change that gradually increases from the end 101 adjacent to the light incident surface 130 to the end 102 away from the light incident surface 130. Furthermore, as Figure 8As shown in the cross-sectional view on the right, the main body 100 includes two end portions 103 and a central portion 104, wherein the two end portions 103 are respectively connected to the first surface 110 and the second surface 120, and the thickness T3 of the two end portions 103 in the direction Z may be less than the thickness T4 of the central portion 104 in the direction Z. Along the direction Y, the thickness of the main body 100 in the direction Z may present a linear change that gradually increases from one of the end portions 103 to the central portion 104 and then gradually decreases from the central portion 104 to the other end portion 103, that is, the thickness of the main body 100 in the direction Z may present a linear change that gradually increases from the two end portions 103 to the central portion 104.

[0034] Please refer to Fig. 9 , which is a schematic diagram of a dot configuration structure of a light guide plate according to an embodiment of the present invention. Fig. 9 The light guide plate LG in the figure does not show the arrangement of the plurality of dots 200. The top view of the plurality of dots 200 arranged on the first surface 110 of the main body 100 can be referred to. Figure 2 .and, Fig. 9 In the figure, the length LGL of the light guide plate LG in the direction X and the width LGW in the direction Y are divided into ten equal parts by dotted lines, thereby being divided into a plurality of blocks FR, that is, the length of a block FR is one tenth of the length LGL and the width is one tenth of the width LGW. Fig. 9 As shown, the first surface 110 of the main body 100 has a first corner C1 and a second corner C2, which are adjacent to the light incident surface 130 and opposite to each other. The first portion P1 of the plurality of dots 200 is disposed in a first region R1 adjacent to the first corner C1. Fig. 9 The lower right side of FIG. 1 shows a projection shape of one of the first parts P1 of the plurality of dots 200 located in the first region R1 in the direction Z, and the second part P2 of the plurality of dots 200 is disposed in the second region R2 adjacent to the second corner C2. Fig. 9 The upper right side of the figure shows the projection shape of one of the second parts P2 of the plurality of dots 200 located in the second region R2 in the direction Z. Furthermore, the first surface 100 of the main body 100 also has a third corner C3 and a fourth corner C4, which are away from the light incident surface 130 and opposite to each other, and the third corner C3 and the first corner C1 are located on the same side of the light guide plate LG, and the fourth corner C4 and the second corner C2 are located on the same side of the light guide plate LG. The third part P3 of the plurality of dots 200 is disposed in the third region R3 adjacent to the third corner C3, Fig. 9 The lower left side of shows the projection shape of one of the third parts P3 of the plurality of dots 200 located in the third region R3 in the direction Z, and the fourth part P4 of the plurality of dots 200 is arranged in the fourth region R4 adjacent to the fourth corner C4. Fig. 9The upper left side of shows the projection shape of one of the fourth parts P4 in the plurality of dots 200 located in the fourth region R4 in the direction Z. The first region R1, the second region R2, the third region R3 and the fourth region R4 may include one or more blocks FR respectively.

[0035] according to Fig. 9 In the illustrated embodiment, the direction perpendicular to the light incident surface 130 is defined as the reference direction BD, wherein the reference direction BD is parallel to the direction X. On the other hand, the direction of the central axis of the projection shape of each dot 200 in the direction Z is defined as the long axis direction of each dot 200. The long axis direction D1 of each dot 200 of the first part P1 has a first angle a1 with the reference direction BD in the counterclockwise direction, and the long axis direction D2 of each dot 200 of the second part P2 has a second angle a2 with the reference direction BD in the clockwise direction, and the first angle a1 and the second angle a2 can be acute angles. The first angle a1 and the second angle a2 can be, for example, 5 degrees, 10 degrees or other suitable angles. In some embodiments, the first angle a1 can decrease as the distance between the dot 200 and the first corner C1 increases, and the second angle a2 can decrease as the distance between the dot 200 and the second corner C2 increases. For example, the first region R1 may include a block FR1 closest to the first corner C1 and two blocks FR2 far from the first corner C1, the first angle a1 of each dot 200 in the block FR1 may be 10 degrees, and the first angle a1 of each dot 200 in the block FR2 may be 5 degrees. Furthermore, the second region R2 may include a block FR3 closest to the second corner C2 and two blocks FR4 far from the second corner C2, the second angle a2 of each dot 200 in the block FR3 may be 10 degrees, and the second angle a2 of each dot 200 in the block FR4 may be 5 degrees.

[0036] The long axis direction D3 of each dot 200 of the third part P3 has a third angle a3 with the reference direction BD in the clockwise direction, and the long axis direction D4 of each dot 200 of the fourth part P4 has a fourth angle a4 with the reference direction BD in the counterclockwise direction, and the third angle a3 and the fourth angle a4 may be acute angles. The third angle a3 and the fourth angle a4 may be, for example, 5 degrees, 10 degrees or other suitable angles. In some embodiments, the third angle a3 may decrease as the distance between the dot 200 and the third corner C3 increases, and the fourth angle a4 may decrease as the distance between the dot 200 and the fourth corner C4 increases. For example, the third region R3 may include a block FR5 closest to the third corner C3 and two blocks FR6 far away from the third corner C3, and the third angle a3 of each dot 200 located in the block FR5 may be 10 degrees, and the third angle a3 of each dot 200 located in the block FR6 may be 5 degrees. Furthermore, the fourth region R4 may include a block FR7 closest to the fourth corner C4 and two blocks FR8 farther from the fourth corner C4. The fourth angle a4 of each dot 200 in the block FR7 may be 10 degrees, and the fourth angle a4 of each dot 200 in the block FR8 may be 5 degrees.

[0037] According to the angle design of the first angle a1, the second angle a2, the third angle a3 and the fourth angle a4, a portion of the dots 200 near the corners C1, C2, C3 and C4 can have a specific rotation angle to increase the probability of light entering the dots 200, thereby improving the brightness of the light after being reflected and / or refracted by the light guide plate LG. Fig. 9 In the illustrated embodiment, some dots 200 in other regions (or blocks FR) outside the aforementioned regions R1, R2, R3 and R4 may not have a rotation angle, that is, the angle between the long axis direction of each dot 200 in other regions and the reference direction BD is 0 degrees.

[0038] The following will describe a display device having the above-mentioned light guide plate LG, but the display device of the present invention is not limited to the following embodiments. Fig.10 , which is a schematic diagram of the structure of a display device according to an embodiment of the present invention. Fig.10 As shown, the display device DD includes a display panel DP and a front light module FLM. The front light module FLM is disposed on the display panel DP and is used as a light source for the display device DD. The display panel DP may include, for example, a liquid crystal display panel or other suitable display panel, wherein the display panel DP may be a reflective display panel, but is not limited thereto. The front light module FLM includes a light guide plate LG and at least one light emitting element EL, wherein the structural design of the light guide plate LG may refer to the light guide plate LG of the aforementioned embodiments, and will not be described in detail herein. Fig.10In the illustrated embodiment, the light emitting element EL is disposed corresponding to the light incident surface 130 of the light guide plate LG, and the light generated by the light emitting element EL can be incident on the light guide plate LG from the light incident surface 130. The second surface 120 of the light guide plate LG can face the display panel DP, so that the light incident on the light guide plate LG can be reflected and / or refracted to be emitted from the light guide plate LG from the second surface 120 and to be incident on the display panel DP, and the light can be reflected by the display panel DP to be incident on the light guide plate LG from the second surface 120 again, and then be incident on the light guide plate LG from the first surface 110, but the present invention is not limited thereto.

[0039] In some embodiments, Fig.10 As shown, the display panel DP may include a first substrate SB1, a second substrate SB2 and a display medium layer DL. The first substrate SB1 and the second substrate SB2 are arranged opposite to each other in the direction Z. The first substrate SB1 may be, for example, a thin film transistor substrate, and the second substrate SB2 may be, for example, a color filter substrate. The display medium layer DL is arranged between the first substrate SB1 and the second substrate SB2. The display medium layer DL may include any suitable display medium, such as (but not limited to) liquid crystal. The first substrate SB1 and the second substrate SB2 may respectively include a hard substrate or a flexible substrate. The hard substrate may include, for example, glass, ceramic, quartz or sapphire. The flexible substrate may include, for example, polyimide (PI), polycarbonate (PC), polyethylene terephthalate (PET) or poly(methyl methacrylate) (PMMA), but is not limited thereto. The display panel DP may have a display area and a peripheral area located on one side of the display area. The display area is used to display images and may include multiple display units, such as pixels or sub-pixels, and the peripheral area may include an electronic unit EU. The electronic unit EU may include, for example, a driving circuit, a circuit board, a chip, etc., but is not limited to this.

[0040] The display panel DP may also include a polarizer POL or other suitable optical films, which are disposed on the second substrate SB2. For example, the polarizer POL may be disposed between the second substrate SB2 and the light guide plate LG. The surface of the first substrate SB1 may also include a conductive layer, an insulating layer, and / or a semiconductor layer for constituting a circuit layer. The conductive layer may include, for example, a metal layer, a transparent conductive layer, or other suitable materials. The insulating layer may include, for example, inorganic insulating materials such as silicon oxide (SiOx), silicon nitride (SiNy), silicon oxynitride (SiOxNy), organic insulating materials, or other suitable materials. The circuit layer may include, for example, electronic components such as wires, switching elements, driving elements, and / or capacitors, but is not limited to the above.

[0041] The following will describe a method for manufacturing the light guide plate LG of the present invention. Fig.11and Figures 12 to 15 . Fig.11 The figure is a flow chart of the steps of a method for manufacturing a light guide plate according to an embodiment of the present invention. Figures 12 to 15 FIG. 1 is a schematic diagram of a manufacturing process of a light guide plate according to an embodiment of the present invention. Fig.11 As shown, the manufacturing method of the light guide plate LG may include the following steps:

[0042] Step S100: providing a main body;

[0043] Step S200: forming a plurality of recesses on the first surface of the main body;

[0044] Step S300: forming a first material layer in the plurality of recesses to form a plurality of embedded structures, wherein the upper surface of each embedded structure is flush with the first surface; and

[0045] Step S400: forming a second material layer on the first surface at positions corresponding to the plurality of recesses to form a plurality of protruding structures, wherein each protruding structure corresponds to one of the plurality of embedded structures to form dots together.

[0046] according to Figures 12 to 15 In the embodiment shown, the light guide plate LG can be formed by, for example, a stamping and coating process. Fig.12 As shown, first, step S100 may be performed to provide a main body 100, wherein the refractive index of the main body 100 is in the range of 1.4 to 1.6. Next, step S200 may be performed to form a plurality of recesses GR on the first surface 110 of the main body 100, for example, by stamping the first surface 110 of the main body 100 with a stamping mold 300 to form the plurality of recesses GR.

[0047] After step S200, step S300 may be performed to form a first material layer M1 in the plurality of recesses GR to form a plurality of embedded structures 220. Fig.13 As shown, a first material layer M1 can be formed in the plurality of recesses GR by a coating process to form a plurality of embedded structures 220 , wherein the refractive index of the first material layer M1 ranges from 1.5 to 1.65. The upper surface 221 of each embedded structure 220 is flush with the first surface 110 of the main body 100 .

[0048] After step S300, step S400 may be performed to form a second material layer M2 on the first surface 110 at positions corresponding to the plurality of recesses GR to form a plurality of protrusion structures 210. Fig.13 As shown, a second material layer M2 may be formed on the first surface 110 and the first material layer M1 by a coating process, wherein the refractive index of the second material layer M2 is in the range of 1.61 to 1.81. Fig.14As shown, the second material layer M2 can be imprinted by the imprinting mold 310 to form the positions corresponding to the multiple embedded structures 220 (ie, the positions corresponding to the multiple recesses GR) in the second material layer M2. Fig.15 The plurality of raised structures 210 are shown. Fig.15 As shown, after forming a plurality of protruding structures 210 , a light guide plate LG can be obtained, wherein each protruding structure 210 corresponds to one of the plurality of embedded structures 220 to form a grid point 200 together.

[0049] In another embodiment, the light guide plate LG may be formed by, for example, an injection process. Specifically, firstly, step S100 and step S200 are performed, and the light guide plate LG may be formed by, for example, an injection process. Fig.12 The imprint mold 300 shown is used as an upper mold and cooperates with the lower mold for forming the main body 100 to perform the first injection, thereby forming a plurality of recesses GR on the first surface 110 of the main body 100, wherein the refractive index of the main body 100 ranges from 1.4 to 1.6. Then, step S300 is performed, and a second injection can be performed to form a first material layer M1 in the plurality of recesses GR to form a plurality of embedded structures 220, wherein the refractive index of the first material layer M1 ranges from 1.5 to 1.65. Then, step S400 is performed, and a third injection can be performed, for example, Fig.14 The imprint mold 310 shown is used as a mold for the third injection molding, so as to form a second material layer M2 at the positions corresponding to the multiple embedded structures 220 (i.e., the positions corresponding to the multiple recesses GR) on the first surface 110 to form multiple protrusion structures 210, wherein the refractive index of the second material layer M2 is in the range of 1.61 to 1.81. Fig.15 The light guide plate LG is shown.

[0050] In summary, according to the light guide plate, the display device used therein, and the method for manufacturing the light guide plate according to the embodiment of the present invention, the embedded structure can achieve the function of guiding light through the structural design of the main body and the dots of the light guide plate, and the raised structure can make the surface of the light guide plate have a paper-like function and provide a protective effect. In addition, by designing the refractive index, size, shape, arrangement method, etc. of the raised structure and the embedded structure of the main body and the dots, the light guiding and / or paper-like effects can be improved.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A light guide plate, characterized in that: include: A main body, comprising a first surface, a second surface and a light incident surface, wherein the second surface is opposite to the first surface, and the light incident surface connects the first surface and the second surface; as well as A plurality of dots are arranged on the first surface, wherein each of the dots comprises: a protrusion structure located on a first side of the first surface; as well as An embedded structure is located on a second side of the first surface, wherein the second side is opposite to the first side and is a side of the first surface closer to the second surface.

2. The light guide plate according to claim 1, wherein: The refractive indexes of any two of the main body, the protruding structure and the embedded structure are different.

3. The light guide plate according to claim 2, wherein: The refractive index of the main body is in the range of 1.4 to 1.6, the refractive index of the protruding structure is in the range of 1.61 to 1.81, and the refractive index of the embedded structure is in the range of 1.5 to 1.

65.

4. The light guide plate according to claim 1, wherein: The thickness of one end of the main body portion adjacent to the light incident surface is smaller than the thickness of one end of the main body portion away from the light incident surface.

5. The light guide plate according to claim 1, wherein: The main body includes two end portions and a central portion, wherein the two end portions are respectively connected to the first surface and the second surface, and the thickness of the two end portions is smaller than the thickness of the central portion.

6. The light guide plate according to claim 1, wherein: The projection shape of the protruding structure on the first surface is circular and has a diameter, the ratio of the length of the embedded structure to the diameter of the protruding structure ranges from 0.89 to 1.48, and the ratio of the width of the embedded structure to the length of the embedded structure ranges from 0.79 to 1.

7. The light guide plate according to claim 1, wherein: The protrusion structure includes a base and a protrusion. The protrusion is arranged on the base and has a curved surface. The geometric centers of the projection shapes of the base and the protrusion on the first surface overlap with each other.

8. The light guide plate according to claim 7, wherein: The projection shape of the base on the first surface is circular and has a diameter, the diameter of the base is twelve times the thickness of the base, the thickness of the protruding structure is three times the thickness of the base, and the curvature radius of the arc surface of the protruding portion is twice the thickness of the base.

9. The light guide plate according to claim 1, wherein: In a cross-sectional profile of the dot, the embedded structure includes: an upper surface, flush with the first surface; a lower surface, opposite to the upper surface; a first side surface connecting the upper surface and the lower surface; and a second side surface, opposite to the first side surface and connecting the upper surface and the lower surface, wherein the first side surface is closer to the light incident surface than the second side surface; Among them, the angle between the first side surface and the upper surface ranges from 30 to 60 degrees, the angle between the first side surface and the lower surface ranges from 113 to 143 degrees, the angle between the second side surface and the upper surface is 90 degrees, and the angle between the second side surface and the lower surface ranges from 97 to 100 degrees.

10. The light guide plate according to claim 1, wherein: The first surface has a first corner and a second corner, which are adjacent to the light incident surface and opposite to each other, a first portion of the plurality of dots is disposed in a first area adjacent to the first corner, and a second portion of the plurality of dots is disposed in a second area adjacent to the second corner; Among them, the long axis direction of each of the dots in the first part has a first angle with a reference direction perpendicular to the light incident surface in the counterclockwise direction, and the long axis direction of each of the dots in the second part has a second angle with the reference direction in the clockwise direction, and the first angle and the second angle are acute angles.

11. The light guide plate according to claim 10, wherein: The first angle decreases as the distance between the screen dot and the first corner increases, and the second angle decreases as the distance between the screen dot and the second corner increases.

12. The light guide plate according to claim 10, wherein: The first surface further has a third corner and a fourth corner, which are away from the light incident surface and opposite to each other, and the third corner and the first corner are located on the same side of the light guide plate, and the fourth corner and the second corner are located on the same side of the light guide plate, a third portion of the plurality of dots is disposed in a third area adjacent to the third corner, and a fourth portion of the plurality of dots is disposed in a fourth area adjacent to the fourth corner; Among them, the long axis direction of each of the dots in the third part has a third angle with the reference direction in the clockwise direction, and the long axis direction of each of the dots in the fourth part has a fourth angle with the reference direction in the counterclockwise direction, and the third angle and the fourth angle are acute angles.

13. The light guide plate according to claim 12, wherein: The third angle decreases as the distance between the grid point and the third corner increases, and the fourth angle decreases as the distance between the grid point and the fourth corner increases.

14. A display device, characterized in that: include: a display panel; as well as A front light module is arranged on the display panel, and the front light module comprises: The light guide plate as claimed in claim 1; as well as A light emitting element is disposed corresponding to the light incident surface, and the light generated by the light emitting element is incident into the light guide plate from the light incident surface.

15. The display device according to claim 14, wherein: When the display device displays a white picture, the glossiness of the display device ranges from 0.7 to 0.8 glossiness units at an angle of 20 degrees, ranges from 1.0 to 1.1 glossiness units at an angle of 60 degrees, and ranges from 1.1 to 1.2 glossiness units at an angle of 85 degrees. When the display device displays a black picture, the glossiness of the display device is 0 glossiness units at an angle of 20 degrees, 0 glossiness units at an angle of 60 degrees, and 1.1 glossiness units at an angle of 85 degrees.

16. A method for manufacturing a light guide plate, characterized in that: include: Providing a main body; forming a plurality of depressions on a first surface of the main body; forming a first material layer in the plurality of recesses to form a plurality of embedded structures, wherein an upper surface of each of the embedded structures is flush with the first surface; and forming a second material layer on the first surface at positions corresponding to the plurality of recesses to form a plurality of protrusion structures; Wherein, each of the protruding structures corresponds to one of the plurality of embedded structures and together form a mesh point.

17. The method for manufacturing a light guide plate according to claim 16, wherein: The refractive index of the main body is in a range of 1.4 to 1.6, the refractive index of the first material layer is in a range of 1.5 to 1.65, and the refractive index of the second material layer is in a range of 1.61 to 1.81.

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