CN211293334U - Light guide plate and light source module - Google Patents

Abstract

A light guide plate has a light incident surface, a light emitting surface and a bottom surface. The bottom surface is provided with a first edge, a second edge, a plurality of convex strip-shaped structures and a plurality of concave strip-shaped structures. The first edge is opposite to the second edge, and the light incident surface is connected between the first edge and the second edge. Each protruding strip-shaped structure and each recessed strip-shaped structure extend from the first edge to the second edge and are arranged from the light incident surface close to the light incident surface to the arrangement direction far away from the light incident surface. Each protruding strip-shaped structure comprises a first reflecting surface, and a first angle is formed between the first reflecting surface and the bottom surface. Each concave strip-shaped structure comprises a second reflecting surface, and a second angle is formed between the second reflecting surface and the bottom surface. The first angle is equal to the second angle. The utility model discloses provide a light source module who has this light guide plate in addition. The utility model provides a light guide plate and light source module can reduce the absorption phenomenon of reflector plate.

Description

Light guide plate and light source module

Technical Field

The present invention relates to a light source module, and more particularly, to a light guide plate and a light source module using the same.

Background

In general, a liquid crystal display device includes a liquid crystal display panel and a backlight module, and since the liquid crystal display panel itself does not emit light, the backlight module is required to provide an illumination light source to the liquid crystal display panel. Therefore, the main function of the backlight module is to provide an illumination source with high luminance and high uniformity.

The backlight module can be divided into a side-in type backlight module and a direct type backlight module. In the conventional side-in backlight module, a groove-shaped structure (such as a V groove, an R groove, etc.) is sometimes designed on the bottom surface of the light guide plate to adjust light to achieve specific effects (such as control of light emitting direction, scattering light, etc.), however, when a part of the optical films (such as a reflective sheet, etc.) are matched with the light guide plate designed in this way, an adsorption phenomenon is generated due to large-area contact between the optical films and the light guide plate, which is easy to cause brightness inconsistency of each region on a display screen, resulting in problems of dark and bright regions.

On the other hand, although the dot structure is designed on the bottom surface of the light guide plate, the effects of light emitting and uniform light can be achieved, and the adsorption phenomenon can be reduced, the arc-shaped surface of the dot structure can change the angle of the emitted light along with the change of curvature, so that the angles of the emitted light are inconsistent, and the effects on the control of the light condensing and emitting directions are poor.

The background section is provided to aid in understanding the present invention, and therefore the disclosure of the background section may include other art that does not constitute a part of the common general knowledge of the skilled person. Furthermore, the statements in the "background" section do not represent that section or the problems which may be solved by one or more embodiments of the present invention, nor are they intended to be known or appreciated by those skilled in the art prior to the present application.

SUMMERY OF THE UTILITY MODEL

The utility model provides a light guide plate can reduce the absorption phenomenon of reflector plate, and then promotes the luminance degree of consistency to promote directive property's spotlight effect.

The utility model provides a light source module can reduce the absorption phenomenon between reflector plate and the light guide plate, and then promotes the luminance degree of consistency to promote directive property's spotlight effect.

Other objects and advantages of the present invention can be further understood from the technical features disclosed in the present invention.

In order to achieve one or a part of or all of the above or other purposes, an embodiment of the present invention provides a light guide plate having a light incident surface, a light emitting surface and a bottom surface. The light-out surface is opposite to the bottom surface, and the light-in surface is connected with the light-out surface and the bottom surface. The bottom surface is provided with a first edge, a second edge, a plurality of convex strip-shaped structures and a plurality of concave strip-shaped structures. The first edge is opposite to the second edge, and the light incident surface is connected between the first edge and the second edge. Each protruding strip-shaped structure and each recessed strip-shaped structure extend from the first edge to the second edge and are arranged from the light incident surface close to the light incident surface to the arrangement direction far away from the light incident surface. Each protruding strip-shaped structure comprises a first reflecting surface, and a first angle is formed between the first reflecting surface and the bottom surface. Each concave strip-shaped structure comprises a second reflecting surface, and a second angle is formed between the second reflecting surface and the bottom surface. The first angle is equal to the second angle.

In order to achieve one or a part of or all of the above or other objects, an embodiment of the invention provides a light source module including a light emitting element and the light guide plate. The light emitting element is arranged opposite to the light incident surface of the light guide plate.

The utility model discloses among the light source module, by disposing a plurality of protruding strip structures in the bottom surface of light guide plate, can reduce the absorption phenomenon between reflector plate and the light guide plate, and then promote the luminance degree of consistency. In addition, a first angle between the first reflecting surface and the bottom surface of each protruding strip-shaped structure is the same as a second angle between the second reflecting surface and the bottom surface of each recessed strip-shaped structure. Therefore, after the light is reflected by the first reflecting surface and the second reflecting surface, the light has the same light-emitting angle, so that the directional light-gathering effect of the light guide plate can be improved, and the light-emitting brightness is further improved.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic perspective view of a light source module according to an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of fig. 1.

Fig. 3 is a schematic view of a light source module according to another embodiment of the present invention.

Fig. 4 is a schematic view of a light source module according to another embodiment of the present invention.

Fig. 5 is a schematic view of a light source module according to another embodiment of the present invention.

Detailed Description

The foregoing and other features, aspects and utilities of the present invention will be apparent from the following more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.

Fig. 1 is a schematic perspective view of a light source module according to an embodiment of the present invention. Fig. 2 is a schematic cross-sectional view of fig. 1. Referring to fig. 1 and 2, a light source module 1 of the present embodiment includes a light guide plate 10 and a light emitting device 20, and optionally includes a reflective sheet 30. The light emitting element 20 is disposed opposite to the light incident surface 100 of the light guide plate 10. The light guide plate 10 has a light incident surface 100, a light emitting surface 200 and a bottom surface 300. The light incident surface 100 is connected to the light emitting surface 200 and the bottom surface 300, and the light emitting surface 200 is opposite to the bottom surface 300. The reflective sheet 30 is disposed beside the bottom surface 300. The bottom surface 300 has a first side 301, a second side 302, a plurality of protruding stripe structures 310 and a plurality of recessed stripe structures 320. The first side 301 is opposite to the second side 302, and the light incident surface 100 is connected between the first side 301 and the second side 302. Each protruding stripe 310 and each recessed stripe 320 extends from the first edge 301 to the second edge 302. Specifically, in the present embodiment, each of the protruding stripe structures 310 and each of the recessed stripe structures 320 extend along an extending direction E, and the extending direction E is, for example, parallel to the light incident surface 100, but not limited thereto. In another embodiment, the extending direction E is, for example, a straight line extending parallel to the light incident surface 100 and the light exit surface 200, or a straight line extending non-parallel to the light incident surface 100, or an extending curve extending the extending direction E, such that each of the convex strip structures 310 and each of the concave strip structures 320 are curved toward the light incident surface 100 or away from the light incident surface 100. In addition, the protruding direction of the plurality of protruding stripe structures 310 and the recessed direction of the plurality of recessed stripe structures 320 are opposite to each other with respect to the bottom surface 300.

The light emitting device 20 is used to provide light L, and the light emitting device 20 is, for example, a strip light source (such as a lamp), but not limited thereto. The light emitting element 20 may also be a light source assembly including a plurality of point light sources, such as Light Emitting Diodes (LEDs), and the present invention is not limited to the type of light source. When the light emitting device 20 uses a point light source, it can be matched with the embodiments of the curved convex stripe structures 310 and the concave stripe structures 320. It should be noted that the light L shown in the drawings of the present invention is only for illustration and is not intended to limit the traveling direction of the light L.

The plurality of convex bar-shaped structures 310 and the plurality of concave bar-shaped structures 320 are, for example, arranged from being close to the light incident surface 100 toward being far from the light incident surface 100 in the arrangement direction a, and in the embodiment, the plurality of convex bar-shaped structures 310 and the plurality of concave bar-shaped structures 320 are, for example, alternately arranged along the arrangement direction a, but not limited thereto. The present invention is not limited to the arrangement between the plurality of protruding bar-shaped structures 310 and the plurality of recessed bar-shaped structures 320, and can be adjusted according to different design requirements. The number of the plurality of protruding bar-shaped structures 310 and the plurality of recessed bar-shaped structures 320 in fig. 1 is only illustrated, and the present invention is not particularly limited to the number of the protruding bar-shaped structures 310 and the number of the recessed bar-shaped structures 320, and the number of the protruding bar-shaped structures 310 is not necessarily the same as the number of the recessed bar-shaped structures 320.

The plurality of protruding stripe structures 310 are adapted to abut against the reflective sheet 30 to avoid an absorption phenomenon between the reflective sheet 30 and the light guide plate 10 (fig. 2 shows the protruding stripe structures 310 on the bottom surface 300 of the light guide plate 10 for clarity, so the reflective sheet 30 and the protruding stripe structures 310 are illustrated as being separated, but not limited thereto), but the invention is not limited thereto. In other embodiments, the reflective sheet 30 may be other optical films, such as an absorbing sheet, or a back frame element of the light source module 1.

The specific structure design of the raised stripe 310 and the recessed stripe 320 will be described in detail below. Referring to fig. 2, each of the protruding stripe structures 310 of the present embodiment includes a first reflective surface 311, and a first angle θ 1 is formed between the first reflective surface 311 and the bottom surface 300. Each of the recessed stripe structures 320 includes a second reflective surface 321, and a second angle θ 2 is formed between the second reflective surface 321 and the bottom surface 300. In the present embodiment, the first angle θ 1 is equal to the second angle θ 2, so that the light-emitting angles of the light beams L can be controlled to be substantially oriented in the same direction. Specifically, due to the manufacturing tolerance problem that the light guide plate 10 may encounter during the manufacturing process, the first angle θ 1 and the second angle θ 2 may have a slight angle difference, which is within 1 °, but not limited thereto. In other embodiments, the first angle θ 1 may range from 1 ° to 30 °, and the second angle θ 2 may range from 1 ° to 30 °, for example, for different optical effects.

In order to make the reflection angles of the light beams L with the same incident angle incident on any portion of the first reflection surface 311 the same, the first reflection surface 311 of the present embodiment is, for example, a plane, but is not limited thereto. Similarly, in order to make the light L with the same incident angle incident on any part of the second reflecting surface 321 have the same reflection angle, the second reflecting surface 321 of the present embodiment is also a plane, for example, but is not limited thereto. In other embodiments, the first reflective surface 311 and the second reflective surface 321 may be concave or convex to achieve different optical effects.

Each of the protruding stripe structures 310 further includes a supporting portion 312, for example, the first reflective surface 311 is connected between the supporting portion 312 and the bottom surface 300, the supporting portion 312 is disposed between the first reflective surface 311 and the light incident surface 100, a first height H1 is provided between the supporting portion 312 and the bottom surface 300, and the supporting portion 312 has a width W1 in a direction perpendicular to the light incident surface 110 (parallel to the arrangement direction a in the present embodiment). In the present embodiment, the first height H1 is, for example, 1 μm to 50 μm, and the width W1 is, for example, 500 μm or less. The supporting portion 312 shown in fig. 2 is a plane parallel to the bottom surface 300, but is not limited to the implementation aspect of the present invention, and in other embodiments, the supporting portion 312 may be a line or a plane, for example, and may be parallel or not parallel to the bottom surface 300. When the support 312 is a line, the width W1 is equal to 0. In addition, when the supporting portion 312 is not parallel to the bottom surface 300, the first height H1 is the maximum distance between the supporting portion 312 and the bottom surface 300.

Each of the concave stripe structures 320 further includes a flat portion 322, the second reflective surface 321 is connected between the flat portion 322 and the bottom surface 300, the second reflective surface 321 is disposed between the flat portion 322 and the light incident surface 100, a second height H2 is provided between the flat portion 322 and the bottom surface 300, and the flat portion 322 has a width W2 in a direction perpendicular to the light incident surface 100. In the present embodiment, the second height H2 is, for example, 1 μm to 50 μm, and the width W2 is, for example, 500 μm or less. In another embodiment, the recessed strip structure 320 may not include the flat portion 322 or the width W2 is equal to 0, and the invention is not limited thereto.

In the light source module 1 of the present embodiment, the plurality of protruding strip structures 310 are disposed on the bottom surface 300 of the light guide plate 10, so that the absorption phenomenon between the reflective sheet 30 and the light guide plate 10 can be reduced, and the brightness uniformity can be further improved. In addition, a first angle θ 1 between the first reflective surface 311 of each protruding stripe 310 and the bottom surface 300 is the same as a second angle θ 2 between the second reflective surface 321 of each recessed stripe 320 and the bottom surface 300. Therefore, the light-emitting angle θ 3 of the light L reflected by the first reflecting surface 311 and emitted out of the light guide plate 10 is the same as the light-emitting angle θ 4 reflected by the second reflecting surface 321 and emitted out of the light guide plate 10, so that the directional light-gathering effect of the light guide plate can be improved, and the light-emitting brightness can be further improved. On the other hand, compare in the light guide plate that the surface disposes ditch form and punctiform composite structure simultaneously among the known art, the utility model discloses protruding strip structure 310 and sunken strip structure 320 of embodiment because the shape is similar with structural, therefore light guide plate 10 only needs to use a processing method can produce protruding strip structure 310 and sunken strip structure 320 of this embodiment, and protruding strip structure 310 directly extends to second limit 302 with sunken strip structure 320 by first limit 301 of light guide plate 100 in addition, can reduce process time, promotes process efficiency.

In the present embodiment, the distance D between each protruding stripe 310 and each recessed stripe 320 is the same, and is, for example, less than or equal to 1000 μm, but not limited thereto. In another embodiment, the intervals between the protruding stripe structures 310 and two adjacent recessed stripe structures 320 are different from each other. In another embodiment, the space D between each protruding stripe 310 and each recessed stripe 320 is not provided, i.e., each protruding stripe 310 is directly connected to each recessed stripe 320.

Each of the raised stripe structures 310 further includes a first surface 313, for example. The first surface 313 is connected between the supporting portion 312 and the bottom surface 300 and is close to the light incident surface 100. The first surface 313 is not mainly used for reflecting the light L. Each recessed stripe structure 320 further includes a second surface 323, for example. The second surface 323 is connected between the flat portion 322 and the bottom surface 300 and is away from the light incident surface 100. The second surface 323 is, for example, mainly not used for reflecting the light L.

Fig. 3 is a schematic view of a light source module according to another embodiment of the present invention. Referring to fig. 3, the light source module 1a of the present embodiment has a similar structure and advantages to the light source module 1 described above, and only the main differences of the structure will be described below. In the light source module 1a of the present embodiment, the first height H1 of each of the protruding stripe structures 310a on the bottom surface 300a of the light guide plate 10a gradually increases from the position close to the light incident surface 100 toward the arrangement direction a; the second height H2 of each of the recessed stripe structures 320a gradually increases from a position near the light incident surface 100 toward the arrangement direction a. When the first height H1 becomes gradually larger, the first angle θ 1 remains unchanged; similarly, when the second height H2 gradually increases, the second angle θ 2 also remains constant, and thus there is no variation in the light exit angle. Since the end of the light guide plate 10a farther from the light incident surface 100 may have insufficient light emitting brightness, under the design adjustment of the present embodiment, the protrusion strip structure 310a farther from the light incident surface 100 has a larger first height H1, in other words, the area of the first reflection surface 311 is larger, so that more light L can be reflected, and the light emitting brightness of the end of the light guide plate 10a farther from the light incident surface 100 is improved. Similarly, the concave stripe structures 320a farther from the light incident surface 100 have a larger second height H2, in other words, the area of the second reflective surfaces 321 is larger, so that more light L can be reflected, and the same function as the convex stripe structures 310a can improve the light emitting brightness of the end of the light guide plate 10a farther from the light incident surface 100. Therefore, the uniformity of the light emitted from the light guide plate 10a can be further improved. Specifically, the gradually increasing height in the present embodiment may mean that the heights of the adjacent protruding bar structures 310a or the adjacent recessed bar structures 320a are gradually increased, or a plurality of adjacent protruding bar structures 310a or adjacent recessed bar structures 320a may be a group, the heights of the protruding bar structures 310a or the recessed bar structures 320a in each group are the same, and the heights of the protruding bar structures 310a or the recessed bar structures 320a in the adjacent groups are gradually increased, but the present invention is not limited thereto.

In the present embodiment, the first height H1 and the second height H2 are designed to be gradually increased from the position close to the light incident surface 100 toward the arrangement direction a, but the present invention is not limited thereto. For example, according to different design requirements, only the first height H1 of each protruding bar-shaped structure 310a may be gradually increased from the position close to the light incident surface 100 toward the arrangement direction a, or only the second height H2 of each recessed bar-shaped structure 320a may be gradually increased from the position close to the light incident surface 100 toward the arrangement direction a.

Fig. 4 is a schematic view of a light source module according to another embodiment of the present invention. Referring to fig. 4, the light source module 1b of the present embodiment has a similar structure and advantages to the light source module 1 of fig. 2, and only the main differences of the structure will be described below. In the light source module 1b of the present embodiment, the distance between the protruding stripe structures 310b and the recessed stripe structures 320b gradually decreases from the position close to the light incident surface 100 toward the arrangement direction a. Specifically, the distance D1 between the plurality of protruding stripe structures 310b on the bottom surface 300b of the light guide plate 10b gradually decreases from the position near the light incident surface 100 toward the arrangement direction a; the distance D2 between the recessed stripe structures 320b gradually decreases from the position near the light incident surface 100 toward the arrangement direction a. Because the end of the light guide plate 10b farther from the light incident surface 100 may have insufficient light emitting brightness, under the design adjustment of the present embodiment, the distance D1 between the protruding strip structures 310b farther from the light incident surface 100 is smaller, in other words, the protruding strip structures 310b are distributed more densely, so that more light L can be reflected, and the light emitting brightness of the end of the light guide plate 10b farther from the light incident surface 100 is improved. Similarly, the distance D2 between the concave stripe structures 320b farther from the light incident surface 100 is smaller, in other words, the concave stripe structures 320b are distributed more densely, so that more light L can be reflected, and the light emitting brightness of the end of the light guide plate 10b farther from the light incident surface 100 can be improved as the function of the convex stripe structures 310b is the same.

In the present embodiment, the distance D1 and the distance D2 are designed to be gradually smaller from the position near the light incident surface 100 toward the arrangement direction a, but the present invention is not limited thereto. For example, according to different design requirements, the distance D1 may be gradually decreased from the position close to the light incident surface 100 toward the arrangement direction a, or the distance D2 may be gradually decreased from the position close to the light incident surface 100 toward the arrangement direction a.

The convex stripe structures 310a and 310b and the concave stripe structures 320a and 320b can also be used in the light source module 1 respectively or in combination, and different stripe structures can be selected according to different design requirements. In addition, the number of the plurality of protruding bar-shaped structures 310a and 310b and the plurality of recessed bar-shaped structures 320a and 320b in fig. 3 and 4 is only shown for illustration, the present invention is not particularly limited to the number of the protruding bar-shaped structures 310a and 310b and the number of the recessed bar-shaped structures 320a and 320b, and the number of the protruding bar-shaped structures 310a and 310b and the number of the recessed bar-shaped structures 320a and 320b are not necessarily the same.

Fig. 5 is a schematic view of a light source module according to another embodiment of the present invention. Referring to fig. 5, the light source module 1c of the present embodiment has similar structure and advantages to the light source module 1 of fig. 2, but the difference is that in the light source module 1c of the present embodiment, the plurality of concave strip-shaped structures 320 on the bottom surface 300c of the light guide plate 10c are arranged in groups of two concave strip-shaped structures, and one of the plurality of convex strip-shaped structures 310 is disposed between any two adjacent groups. The arrangement between the plurality of protruding strip-shaped structures 310 and the plurality of recessed strip-shaped structures 320 of the light source modules 1 and 1c is only an implementation manner, and the arrangement between the plurality of protruding strip-shaped structures 310 and the plurality of recessed strip-shaped structures 320 is not limited to the above-mentioned embodiment, and can be adjusted according to different design requirements.

In summary, in the light source module of the present embodiment, the plurality of protruding strip structures are disposed on the bottom surface of the light guide plate, so that the absorption phenomenon between the reflective sheet and the light guide plate can be reduced, and the brightness uniformity can be further improved. In addition, a first angle between the first reflecting surface and the bottom surface of each protruding strip-shaped structure is the same as a second angle between the second reflecting surface and the bottom surface of each recessed strip-shaped structure. Therefore, the light-emitting angle of the light reflected by the first reflecting surface and the light-emitting angle of the light reflected by the second reflecting surface are the same, so that the directional light-gathering effect of the light guide plate can be improved, and the light-emitting brightness is further improved. On the other hand, compare in the light guide plate that the surface disposes the composite construction of ditch form and punctiform simultaneously among the known art, the utility model discloses protruding strip structure and sunken strip structure of embodiment are because the shape is similar with structural, therefore the light guide plate only needs to use a processing method can produce protruding strip structure and sunken strip structure of this embodiment, can reduce process time, promotes processing procedure efficiency.

However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereto, and all simple equivalent changes and modifications made according to the claims and the contents of the present invention are still included in the scope covered by the present invention. Moreover, it is not necessary for any embodiment or claim of the invention to address all of the objects, advantages, or features disclosed herein. Furthermore, the abstract and the utility model name are only used for assisting the retrieval of patent documents and are not used for limiting the scope of rights of the utility model. Furthermore, the terms "first," "second," and the like in the description and in the claims are used for naming elements (elements) or distinguishing between different embodiments or ranges, and are not intended to limit the upper or lower limit on the number of elements.

Description of reference numerals:

1. 1a, 1b, 1 c: light source module

10. 10a, 10b, 10 c: light guide plate

20: light emitting element

30: reflector plate

100: light incident surface

200: light emitting surface

300. 300a, 300b, 300 c: bottom surface

301: first side

302: second side

310. 310a, 310 b: protruding strip structure

311: first reflecting surface

312: supporting part

313: first surface

320. 320a, 320 b: concave strip structure

321: second reflecting surface

322: flat part

323: second surface

A: direction of arrangement

D. D1, D2: distance between each other

E: direction of extension

H1: first height

H2: second height

L: light ray

W1, W2: width of

θ 1: first angle

θ 2: second angle

θ 3, θ 4: and (4) light-emitting angle.

Claims (12)

1. A light guide plate, wherein the light guide plate has a light incident surface, a light exit surface and a bottom surface, the light exit surface is opposite to the bottom surface, the light incident surface is connected to the light exit surface and the bottom surface, the bottom surface has a first edge, a second edge, a plurality of protruding strip structures and a plurality of recessed strip structures, the first edge is opposite to the second edge, the light incident surface is connected between the first edge and the second edge, each of the plurality of protruding strip structures and each of the plurality of recessed strip structures extend from the first edge to the second edge and are arranged in a direction of arrangement away from the light incident surface, each of the plurality of protruding strip structures includes a first reflecting surface, a first angle is provided between the first reflecting surface and the bottom surface, each of the plurality of recessed strip structures includes a second reflecting surface, the second reflective surface has a second angle with the bottom surface, wherein the first angle is equal to the second angle.

2. The light guide plate according to claim 1, wherein each of the plurality of protruding stripe structures further comprises a support portion, a first height is formed between the support portion and the bottom surface, the first height is 1 μm to 50 μm, and the first reflective surface is connected between the support portion and the bottom surface.

3. The light guide plate according to claim 2, wherein the width of the supporting portion in a direction perpendicular to the light incident surface is less than or equal to 500 μm.

4. The light guide plate according to claim 1, wherein each of the plurality of concave stripe structures further includes a flat portion, a second height is provided between the flat portion and the bottom surface, the second height is 1 μm to 50 μm, the second reflective surface is connected between the flat portion and the bottom surface, and a width of the flat portion in a direction perpendicular to the light incident surface is less than or equal to 500 μm.

5. The light guide plate according to claim 2, wherein the first height of each of the plurality of protruding stripe structures gradually increases from a position near the light incident surface toward the arrangement direction.

6. The light guide plate according to claim 1, wherein the distance between the plurality of protruding stripe structures gradually decreases from the position near the light incident surface toward the arrangement direction.

7. The light guide plate according to claim 4, wherein the second height of each of the plurality of concave stripe structures is gradually increased from a position close to the light incident surface toward the arrangement direction.

8. The light guide plate according to claim 1, wherein the spacing between the plurality of concave stripe structures gradually decreases from the position near the light incident surface toward the arrangement direction.

9. The light guide plate according to claim 1, wherein the plurality of convex stripe structures and the plurality of concave stripe structures are alternately arranged along the arrangement direction.

10. The light guide plate according to claim 1, wherein the plurality of concave stripe structures are arranged in groups of two, and one of the plurality of convex stripe structures is disposed between any two adjacent groups.

11. A light source module, comprising a light guide plate and a light emitting element, wherein:

the light guide plate is provided with a light inlet surface, a light outlet surface and a bottom surface, the light outlet surface is opposite to the bottom surface, the light inlet surface is connected with the light outlet surface and the bottom surface, the bottom surface is provided with a first edge, a second edge, a plurality of convex strip-shaped structures and a plurality of concave strip-shaped structures, the first edge is opposite to the second edge, the light inlet surface is connected between the first edge and the second edge, each convex strip-shaped structure and each concave strip-shaped structure extend from the first edge to the second edge and are arranged in the arrangement direction far away from the light inlet surface, each convex strip-shaped structure comprises a first reflecting surface, a first angle is formed between the first reflecting surface and the bottom surface, each concave strip-shaped structure comprises a second reflecting surface, and a second angle is formed between the second reflecting surface and the bottom surface, wherein the first angle is equal to the second angle; and

the light emitting element is arranged opposite to the light incident surface of the light guide plate.

12. The light source module of claim 11, further comprising a reflective sheet disposed adjacent to the bottom surface.

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