CN102213398A - Light guide plate and light source module - Google Patents

Abstract

A light guide plate and a light source module are provided, the light guide plate comprises a first surface, a second surface, at least one light incident surface and a plurality of groove sets. The second surface is opposite to the first surface. The light incident surface is connected with the first surface and the second surface. The groove groups are dispersedly arranged on the second surface. Each groove group comprises a plurality of curved grooves, each curved groove is provided with a curved inclined reflecting surface and a curved backlight side surface which are connected, and the curved inclined reflecting surface is inclined relative to the first surface. The curved grooves in each groove group are curved in the same direction, and the curved inclined reflection surface of one of the two adjacent curved grooves is connected with the curved backlight side surface of the other of the two adjacent curved grooves. A light source module is also provided.

Description

Light guide plate and light source module

【Technical field】

The invention relates to an optical element and a light source, and in particular to a light guide plate and a light source module.

【Background technique】

In the existing side light source module, the light guide plate is used to guide the light beam emitted by the light-emitting element disposed beside the light guide plate to the front of the light guide plate to form a surface light source. Generally speaking, when the light beam emitted by the light-emitting element enters the light guide plate through the side of the light guide plate, it will be continuously totally reflected by the upper and lower surfaces of the light guide plate, and be confined in the light guide plate. However, the microstructures on the surface of the light guide plate can destroy the total reflection, so that the light beam enters the upper surface at an angle smaller than the critical angle and penetrates the upper surface.

Although the microstructure can achieve the effect of destroying total reflection, most of the light beams affected by the microstructure exit obliquely from the upper surface of the light guide plate instead of forwardly exiting from the upper surface. In order to make the light beams exit in the forward direction, a prism sheet is usually disposed on the upper surface of the light guide plate of the existing light source module to guide the light beams in a direction close to directly above. In addition, the prism sheet will totally reflect a part of the light beam at the traveling angle back to the light guide plate to reuse the light beam. However, when the light beam passes through one more prism sheet and the light beam is totally reflected back to the light guide plate, light loss will be caused, and the brightness provided by the light source module will be reduced.

China Taiwan Patent No. I282021 discloses a light guide plate microstructure, which is repeatedly arranged on the bottom surface of the light guide plate. China Taiwan Patent No. I296352 discloses a light guide plate with a multi-layer ring structure. The light guide plate has a first annular microstructure and a second annular microstructure. The first and second annular microstructures have different bottom widths. The microstructure can be located on the lower surface of the light guide plate. US Patent No. 6454452 discloses that the bottom surface of the light guide plate has a wedge-shaped groove, wherein the angle between the slope of the groove and the bottom surface can be 43 degrees, 45 degrees and 47 degrees. China Taiwan Patent No. M321111 discloses a light guide plate with a microstructure arranged in a certain order. US Patent No. 6612722 discloses a light guide plate with microstructures. US Patent No. 6834973 discloses that the bottom surface of the light guide plate has a micro-reflection structure.

【Content of invention】

The invention provides a light guide plate capable of reducing light loss.

The invention provides a light source module with high light utilization rate.

Other purposes 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 part or all of the above objectives or other objectives, an embodiment of the present invention provides a light guide plate, including a first surface, a second surface, at least one light incident surface and several groove groups . The second surface is opposite to the first surface. The light incident surface connects the first surface and the second surface. These groove groups are distributed on the second surface. Each groove group includes several curved grooves, each curved groove has a curved inclined reflective surface connected with a curved backlight side, and the curved inclined reflective surface is inclined relative to the first surface. These curved grooves in each groove group are curved in the same direction, and the curved inclined reflective surface of one of the adjacent two curved grooves is connected with the curved backlight side of the other of the adjacent two curved grooves .

Another embodiment of the present invention provides a light source module, including the above-mentioned light guide plate and at least one light emitting element. The light emitting element is arranged beside the light incident surface and is suitable for emitting a light beam, wherein the light beam is suitable for entering the light guide plate through the light incident surface, and is suitable for passing out of the light guide plate through the first surface. The curved and inclined reflective surface is suitable for reflecting the light beam from the light incident surface to the first surface.

Following the above, the present invention provides a light guide plate, including:

a first surface;

a second surface, opposite to the first surface;

at least one light incident surface connecting the first surface and the second surface; and

A plurality of groove groups are dispersedly arranged on the second surface, wherein each groove group includes several curved grooves, and each curved groove has a curved inclined reflective surface connected with a The curved backlight side, the curved inclined reflective surface is inclined relative to the first surface, the curved grooves in each groove group are curved in the same direction, and the curved grooves of one of the two adjacent curved grooves are The curved inclined reflective surface is connected with the curved backlight side of the other of the two adjacent curved grooves.

The light guide plate is characterized in that: the average inclination angles of the curved inclined reflective surfaces of the curved grooves of each groove group relative to the first surface are substantially different.

The light guide plate is characterized in that: the average inclination angles of the curved slanted reflective surfaces of the curved grooves of each groove group relative to the first surface are classified in descending order , the difference between any two adjacent average inclination angles in the order of size is less than or equal to 10 degrees.

The light guide plate is characterized in that: the average inclination angle of each curved inclined reflective surface is greater than or equal to 30 degrees to less than or equal to 60 degrees.

The light guide plate is characterized in that each of the curved grooves is an arc groove, and the curved inclined reflective surface of the arc groove is located between the curved backlight side and the light incident surface.

The light guide plate is characterized in that each of the curved grooves is an annular groove.

The light guide plate is characterized in that: the curved inclined reflective surface of the curved groove is located between the curved backlight side of the curved groove and a center of curvature of the curved groove.

The light guide plate is characterized in that: the curved backlight side of the curved groove is located between the curved inclined reflective surface of the curved groove and a center of curvature of the curved groove.

The present invention also provides a light source module, including:

A light guide plate, comprising:

a first surface;

a second surface, opposite to the first surface;

at least one light incident surface connecting the first surface and the second surface; and

A plurality of groove groups are dispersedly arranged on the second surface, wherein each groove group includes several curved grooves, and each curved groove has a curved inclined reflective surface connected with a The curved backlight side, the curved inclined reflective surface is inclined relative to the first surface, the curved grooves in each groove group are curved in the same direction, and the curved grooves of one of the two adjacent curved grooves are A curved inclined reflective surface is connected to the curved backlight side of the other of the two adjacent curved grooves; and

At least one light-emitting element is arranged beside the light incident surface and is suitable for emitting a light beam, wherein the light beam is suitable for entering the light guide plate through the light incident surface, and is suitable for passing out of the light guide plate through the first surface , the curved inclined reflective surface is suitable for reflecting the light beam from the incident surface to the first surface.

The light source module is characterized in that: the average inclination angles of the curved inclined reflective surfaces of the curved grooves of each groove group relative to the first surface are substantially different.

The light source module is characterized in that: the minimum difference between the average inclination angles of the curved inclined reflective surfaces of the curved grooves of each groove group relative to the first surface is less than or equal to 10 Spend.

The light source module is characterized in that: the average inclination angle of each curved inclined reflective surface is greater than or equal to 30 degrees to less than or equal to 60 degrees.

The light source module is characterized in that each of the curved grooves is an arc-shaped groove, and the curved inclined reflective surface of the arc-shaped groove is located between the curved backlight side and the light-incident surface.

The light source module is characterized in that each of the curved grooves is an annular groove.

The light source module is characterized in that: the at least one light incident surface is two opposite light incident surfaces, the at least one light emitting element is two light emitting elements respectively arranged beside the two light incident surfaces, and the light source module is further It includes a control unit electrically connected to the two light-emitting elements to drive the two light-emitting elements to flash alternately.

The light source module is characterized in that: the average inclination angle of each curved inclined reflective surface is greater than or equal to 30 degrees to less than or equal to 50 degrees.

The light source module is characterized in that: the average inclination angle of each curved inclined reflective surface is greater than or equal to 40 degrees to less than or equal to 60 degrees.

The light source module is characterized in that: the curved inclined reflective surface of the curved groove is located between the curved backlight side of the curved groove and a center of curvature of the curved groove.

The light source module is characterized in that: the curved backlight side of the curved groove is located between the curved inclined reflective surface of the curved groove and a center of curvature of the curved groove.

The light source module is characterized in that it further includes a reflection unit disposed on the second surface.

Embodiments of the present invention may have at least one of the following advantages or effects. In the light guide plate and the light source module of the embodiment of the present invention, the second surface is provided with a curved inclined reflective surface, and the curved inclined reflective surface can reflect light to a desired direction. Therefore, the amount of optical film on the first surface of the light guide plate can be reduced or no optical film can be used, so that light loss and cost can be reduced.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail together with the accompanying drawings.

【Description of drawings】

FIG. 1A is a schematic cross-sectional view of a light source module according to an embodiment of the present invention.

FIG. 1B is a three-dimensional schematic diagram of the light guide plate and the light emitting element in FIG. 1A .

FIG. 1C is a partially enlarged view of the second surface in FIG. 1A .

FIG. 2 is a light distribution diagram of the light source module in FIG. 1A .

FIG. 3 is a partially enlarged view of the second surface of the light source module according to another embodiment of the present invention.

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

4B is a schematic diagram of the cross section of the light source module in FIG. 4A along the line I-I and the cross section of the liquid crystal display panel disposed on the light source module.

5 is a schematic diagram of a section of a light source module and a section of a liquid crystal display panel disposed on the light source module according to another embodiment of the present invention.

50: LCD panel

52: Active element array substrate

54: Liquid crystal layer

56: opposite substrate

100, 100i, 100j: light source module

110, 110a, 110b: light emitting elements

112: Beam

120: reflection unit

130: Control unit

200, 200i: light guide plate

210: First Surface

220: second surface

230, 230a, 230b: light incident surface

240, 240’, 240i, 240j: groove set

242, 242', 242a, 242a', 242ai, 242aj, 242b, 242b', 242bi, 242bj, 242c, 242c', 242ci, 242cj, 242i, 242j: curved groove

243, 243', 243i, 243j: Curved inclined reflective surface

245, 245': curved backlit sides

C, C': Center of curvature

D1: first direction

D2: Second direction

H1, H2, H3: Depth

L: left eye

P1, P2, P3: Width

R: right eye

θ, θ", θ1, θ1', θ2, θ2', θ3, θ3': average tilt angle

【Detailed ways】

The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only directions referring to the attached drawings. Accordingly, the directional terms are used to illustrate and not to limit the invention.

1A is a schematic cross-sectional view of a light source module according to an embodiment of the present invention, FIG. 1B is a perspective view of a light guide plate and a light-emitting element in FIG. 1A , and FIG. 1C is a partially enlarged view of a second surface in FIG. 1A . Please refer to FIG. 1A to FIG. 1C , the light source module 100 of this embodiment includes a light guide plate 200 and at least one light emitting element 110 (in FIG. 1B , several light emitting elements 110 are taken as an example). The light guide plate 200 includes a first surface 210 , a second surface 220 , at least one light incident surface 230 (one light incident surface 230 is taken as an example in FIG. 1A and FIG. 1B ) and several groove groups 240 . The second surface 220 is opposite to the first surface 210 . The light incident surface 230 connects the first surface 210 and the second surface 220 . In this embodiment, the first surface 210 is substantially parallel to the second surface 220 , and the light incident surface 230 is substantially perpendicular to the first surface 210 and the second surface 220 , but the invention is not limited thereto.

The groove sets 240 are distributed on the second surface 220 . Each groove group 240 includes several curved grooves 242 (in FIG. The inclined reflective surface 243 and a curved backlight side 245 , wherein the curved inclined reflective surface 243 is inclined relative to the first surface 210 . In this embodiment, both the curved inclined reflective surface 243 and the curved backlight side 245 are surfaces of the light guide plate 200 . These curved grooves 242 in each groove group 240 are bent in the same direction, and the curved inclined reflective surface 243 of one of the adjacent two curved grooves 242 is the same as that of the other of the adjacent two curved grooves 242. The curved backlight side 245 is attached. For example, the curved inclined reflective surface 243 of the curved groove 242b is connected to the backlight side 245 of the curved groove 242a.

The light emitting element 110 is disposed beside the light incident surface and is suitable for emitting a light beam 112 . In this embodiment, each light emitting element 110 is, for example, a light-emitting diode (LED). However, in other embodiments, the light emitting diodes 110 can also be replaced by a fluorescent lamp or other suitable light emitting elements. The light beam 112 is suitable for entering the light guide plate 200 through the light incident surface 230 , and is suitable for passing out of the light guide plate 200 through the first surface 210 . In addition, the curved inclined reflective surface 243 is suitable for reflecting the light beam 112 from the light incident surface 230 to the first surface 210 .

In the light guide plate 200 and the light source module 100 of this embodiment, the curved inclined reflective surface 243 provided on the second surface 220 can reflect the light beam 112 to a desired direction. Therefore, the amount of optical film on the first surface 210 of the light guide plate 200 can be reduced (such as using a lens array film) or no optical film can be used, thus reducing light loss and cost. For example, when the inclination of the curved inclined reflective surface 243 is properly designed, the curved inclined reflective surface 243 can make the light beam 112 emit from the light guide plate 200 in a direction approximately perpendicular to the first surface 210, so that the first surface 210 The transmission direction of the light beam 112 can be corrected without disposing a prism sheet on the top, thereby reducing light loss and cost.

In this embodiment, each curved groove 242 is an arc groove, and the curved inclined reflective surface 243 of the arc groove is located between the curved backlight side 245 and the light incident surface 230 . In this embodiment, the curved inclined reflective surface 243 of the curved groove 242 is located between the curved backlight side 245 of the curved groove 242 and a center of curvature C of the curved groove 242 . In addition, in this embodiment, the centers of curvature C of the curved grooves 242 a , 242 b , 242 c in each groove set 240 substantially coincide with each other, that is, the curved grooves 242 are concentric arc-shaped grooves.

In addition, in this embodiment, the curved groove 242 , the curved inclined reflective surface 243 and the curved side surface 245 are curved in a direction substantially parallel to the first surface 210 . In this way, the light beam 112 reflected by the curved inclined reflective surface 243 can spread in a direction parallel to the first surface 210 instead of being limited to a specific direction. In addition, in this embodiment, the section line obtained by cutting the curved inclined reflective surface 243 along the direction perpendicular to the first surface 210 is also curved (as shown in FIG. 1A ), so that the light beam 112 is developed on a plane perpendicular to the first surface 210 and not limited to a specific direction. Since the curved inclined reflective surface 243 can expand the light beam, the light beam 112 emitted from the first surface 210 can have a relatively smooth light distribution, and can meet the requirements of a wider viewing angle, and is suitable for being used as a backlight for a liquid crystal display panel. source, or as other lighting that requires smooth light distribution or wide viewing angles. However, in other embodiments, the section line of the curved inclined reflective surface 243 in the direction perpendicular to the first surface 210 may also be straight.

In this embodiment, the average inclination angle θ of the curved inclined reflective surfaces 243 of the curved grooves 242 of each groove group 240 relative to the first surface 210 is substantially different, for example, the curved concave The average inclination angles θ1, θ2, θ3 of the inclined reflective surfaces 243 of the grooves 242a, 242b, 242c are not equal to each other. Since the section line of the curved inclined reflective surface 243 in the direction perpendicular to the first surface 210 is curved (the curved section line shown in FIG. 1A ), the tangent direction at different points on the section line The angle of inclination relative to the first surface 210 may also be different. The average inclination angle is defined as the addition of the inclination angles of the tangent direction of each point on the section line relative to the first surface 210 , and then dividing by the number of points on the section line. Since the average inclination angles θ1, θ2, and θ3 are not equal to each other, the travel direction of the light beam 112 reflected by the curved inclined reflective surface 243 of the curved grooves 242a, 242b, 242c will also be on the plane perpendicular to the first surface 210 In this way, the outgoing light beam 112 can have a relatively smooth light distribution and meet the requirement of a wider viewing angle.

In this embodiment, after the average inclination angle θ of the curved and inclined reflective surfaces 243 of the curved grooves 242 of each groove group 240 relative to the first surface 210 is sorted in descending order, the The difference between any two adjacent average inclination angles θ in size order is less than or equal to 10 degrees. For example, the average inclination angle θ1, the average inclination angle θ2 and the average inclination angle θ3 are, for example, 44 degrees, 50 degrees and 56 degrees, and the difference between 44 degrees and 50 degrees is less than or equal to 10 degrees, and 50 degrees and 56 degrees The difference in degrees is also less than or equal to 10 degrees. In addition, the present invention does not limit the size of the average inclination angles θ1, θ2, θ3 from small to large, and they can also be arranged from large to small or randomly.

In this embodiment, the average inclination angle θ of each curved inclined reflective surface 243 is greater than or equal to 30 degrees to less than or equal to 60 degrees, so that the light beam 210 can be emitted toward a direction nearly perpendicular to the first surface 210 . In this embodiment, the material of the light guide plate 200 is plastic (such as acrylic). However, in other embodiments, the light guide plate 200 can also be made of glass, other plastics, or other suitable transparent materials. In addition, in this embodiment, the curved backlight side 245 can be substantially perpendicular to the first surface 210 , nearly perpendicular to the first surface 210 or inclined relative to the first surface 210 .

The widths P1 , P2 , P3 of the curved grooves 242 a , 242 b , 242 c in each groove group 240 in the radial direction radiating from the center of curvature C may be substantially equal, partially equal, or completely unequal. In addition, the depths H1 , H2 , H3 of the curved grooves 242 a , 242 b , 242 c of each groove group 240 may also be substantially equal, partially equal, or completely unequal. It is worth noting that the present invention does not limit each groove group 240 to include 3 curved grooves 242, in other embodiments, each groove group 240 may also include 2 curved grooves 242 or include 4 above the curved groove 242 .

In addition, in this embodiment, the width of each groove set 240 is, for example, greater than or equal to 10 microns to less than or equal to 100 microns. Moreover, the distribution density of the groove groups 240 on the second surface 220 can be designed so that the light beam 112 emitted from the first surface 210 is uniformly distributed. For example, the number density of the groove sets 240 can increase gradually from a place close to the light incident surface 230 to a place far away from the light incident surface 230 .

In this embodiment, the light source module 100 further includes a reflection unit 120 disposed on the second surface 220 . The reflective unit 120 is, for example, a reflective sheet suitable for reflecting the light beam 112 . However, in other embodiments, the light source module 100 may not include the reflection unit 120 .

2 is a light distribution diagram of the light source module in FIG. 1A , wherein the first direction D1 is a direction parallel to the light incident surface 230 , and the second direction D2 is a direction perpendicular to the light incident surface 230 . In this embodiment, the second direction D2 is also parallel to the symmetry plane passing through the center of curvature C of the curved grooves 242 of the groove set 240 , but the invention is not limited thereto. It can be seen from Figure 2 that the light intensity distribution in the first direction D1 or the second direction D2 has a certain degree of smoothness, that is, as the viewing angle in the first direction D1 or the second direction D2 changes slowly, there is no sharp change. Variety. Such light intensity distribution meets the requirements of liquid crystal displays.

FIG. 3 is a partially enlarged view of the second surface of the light source module according to another embodiment of the present invention. Please refer to FIG. 1A , FIG. 1C and FIG. 3 , the light source module of this embodiment is similar to the light source module of FIG. 1A , and the differences between the two are as follows. In the light source module of this embodiment, the curved backlight side 245' of each curved groove 242' (such as curved grooves 242a', 242b', 242c') of the groove group 240' is located in the curved shape. Between the curved inclined reflective surface 243' of the groove 242' and a center of curvature C' of the curved groove. The curved direction of the curved inclined reflective surface 243' can also achieve the effect of expanding the light beam 112.

4A is a schematic top view of a light source module according to another embodiment of the present invention, and FIG. 4B is a schematic diagram of a cross section of the light source module of FIG. 4A along line I-I and a cross section of a liquid crystal display panel disposed on the light source module . Please refer to FIG. 4A and FIG. 4B , the light source module 100i of this embodiment is similar to the light source module 100 of FIG. 1A , and the differences between the two are as follows. In the light source module 100i of this embodiment, each curved groove 242i (such as curved grooves 242ai, 242bi, 242ci) of each groove group 240i is an annular groove. The annular curved groove 242i can be regarded as an extension of the arc-shaped curved groove 242' shown in FIG. 3 and formed in a circle. In this embodiment, the light guide plate 200i has two opposite light-incident surfaces 230 (such as light-incident surfaces 230a and 230b), and the light-emitting element 110 can be divided into light-emitting elements 110a and 110b, and the light-emitting element 110a and the light-emitting element 110b are arranged separately. Beside the two light incident surfaces 230a and 230b. In this embodiment, the light source module 100i further includes a control unit 130 electrically connected to the light emitting elements 110a and 110b to drive the light emitting elements 110a and 110b to blink alternately. In other words, when the light emitting element 110a emits the light beam 112a, the light emitting element 110b does not emit the light beam 112b, and when the light emitting element 110b emits the light beam 112b, the light emitting element 110a does not emit the light beam 112a.

In this embodiment, the average inclination angle of each curved inclined reflective surface 243i is greater than or equal to 40 degrees to less than or equal to 60 degrees. For example, the average inclination angles θ1', θ2', θ3' of the inclined reflective surfaces 243i of the curved grooves 242ai, 242bi, 242ci may be different from each other, but the present invention is not limited thereto. A liquid crystal panel 50 may be arranged above the light source module 100i of this embodiment to form a three-dimensional display. In this embodiment, the liquid crystal panel 50 includes an active element array substrate 52, a liquid crystal layer 54, and an opposite substrate 56 arranged in sequence from bottom to top, wherein the active element array substrate 52 is, for example, a thin film transistor array substrate, and the opposite The substrate 56 is, for example, a color filter array substrate. The design of the above-mentioned average inclination angle can make the light beam 112b emitted by the light-emitting element 110b be reflected toward the upper left of FIG. And the light beam 112a emitted by the light emitting element 110a is reflected by the curved inclined reflective surface 243i toward the upper right of FIG. With the light beams 112a and 112b carrying left-eye images and right-eye images alternately, a stereoscopic image can be formed in the user's brain.

5 is a schematic diagram of a section of a light source module and a section of a liquid crystal display panel disposed on the light source module according to another embodiment of the present invention. Referring to FIG. 5 , the light source module 100j of this embodiment is similar to the light source module 100i of FIG. 4B , and the main difference between them lies in the setting of the average inclination angle of the curved inclined reflective surface. In the light source module 100j of this embodiment, the average inclination angle θ" It is greater than or equal to 30 degrees to less than or equal to 50 degrees. The setting of such an average inclination angle can make the light beam 112b emitted by the light emitting element 110b reflected by the curved inclined reflective surface 243j to the upper right of FIG. The image is transmitted to the right eye R of the user, and the light beam 112a emitted by the light-emitting element 110a is reflected toward the upper left of FIG. left eye L. By the light beams 112a and 112b alternately carrying left-eye images and right-eye images, a stereoscopic image can be formed in the brain of the user. In this embodiment, the curved inclined reflective surface 243j is perpendicular to the first surface The section line in the direction of 210 is a straight line, but it may also be a curve in other embodiments.

In summary, the embodiments of the present invention may have at least one of the following advantages or effects. In the light guide plate and the light source module of the embodiment of the present invention, the second surface is provided with a curved inclined reflective surface, and the curved inclined reflective surface can reflect light to a desired direction. Therefore, the amount of optical film on the first surface of the light guide plate can be reduced or no optical film is used, thus reducing light loss and cost.

The above is only a preferred embodiment of the present invention, and should not limit the scope of the present invention, that is, all simple equivalent changes and modifications made according to the patent scope of the present invention and the content of the description of the invention are still the same. It is within the scope covered by the patent of the present invention. In addition, any embodiment or scope of claims of the present invention does not need to achieve all the objectives or advantages or features disclosed in the present invention.

Claims (20)

1. A light guide plate, comprising: a first surface; a second surface, opposite to the first surface; at least one light incident surface connecting the first surface and the second surface; and A plurality of groove groups are dispersedly arranged on the second surface, wherein each groove group includes several curved grooves, and each curved groove has a curved inclined reflective surface connected with a The curved backlight side, the curved inclined reflective surface is inclined relative to the first surface, the curved grooves in each groove group are curved in the same direction, and the curved grooves of one of the two adjacent curved grooves are The curved inclined reflective surface is connected with the curved backlight side of the other of the two adjacent curved grooves. 2. The light guide plate according to claim 1, characterized in that: the average inclination angles of the curved inclined reflective surfaces of the curved grooves of each groove group relative to the first surface are substantially different . 3. The light guide plate according to claim 2, characterized in that: the average inclination angle of the curved inclined reflective surfaces of the curved grooves of each groove group relative to the first surface is as large as After the small order is classified, the difference between the average inclination angles of any two adjacent in the order of size is less than or equal to 10 degrees. 4 . The light guide plate as claimed in claim 1 , wherein an average inclination angle of each curved inclined reflective surface is greater than or equal to 30 degrees and less than or equal to 60 degrees. 5. The light guide plate according to claim 1, wherein each of the curved grooves is an arc-shaped groove, and the curved inclined reflective surface of the arc-shaped groove is located between the curved backlight side and the entrance between glossy surfaces. 6. The light guide plate as claimed in claim 1, wherein each of the curved grooves is an annular groove. 7. The light guide plate according to claim 1, wherein the curved inclined reflective surface of the curved groove is located at a center of curvature between the curved backlight side of the curved groove and the curved groove between. 8. The light guide plate according to claim 1, wherein the curved backlight side of the curved groove is located at a center of curvature between the curved inclined reflective surface of the curved groove and the curved groove between. 9. A light source module, comprising: A light guide plate, comprising: a first surface; a second surface, opposite to the first surface; at least one light incident surface connecting the first surface and the second surface; and A plurality of groove groups are dispersedly arranged on the second surface, wherein each groove group includes several curved grooves, and each curved groove has a curved inclined reflective surface connected with a The curved backlight side, the curved inclined reflective surface is inclined relative to the first surface, the curved grooves in each groove group are curved in the same direction, and the curved grooves of one of the two adjacent curved grooves are A curved inclined reflective surface is connected to the curved backlight side of the other of the two adjacent curved grooves; and At least one light-emitting element is arranged beside the light incident surface and is suitable for emitting a light beam, wherein the light beam is suitable for entering the light guide plate through the light incident surface, and is suitable for passing out of the light guide plate through the first surface , the curved inclined reflective surface is suitable for reflecting the light beam from the incident surface to the first surface. 10. The light source module according to claim 9, characterized in that: the average inclination angle of the curved inclined reflective surfaces of the curved grooves of each groove group with respect to the first surface is substantially the same same. 11. The light source module according to claim 10, characterized in that: the average inclination angles of the curved inclined reflective surfaces of the curved grooves of each groove group relative to the first surface The minimum difference is less than or equal to 10 degrees. 12 . The light source module as claimed in claim 9 , wherein an average inclination angle of each curved inclined reflective surface is greater than or equal to 30 degrees and less than or equal to 60 degrees. 13 . 13. The light source module according to claim 9, wherein each of the curved grooves is an arc-shaped groove, and the curved inclined reflective surface of the arc-shaped groove is located between the curved backlight side and the between the incident surfaces. 14. The light source module as claimed in claim 9, wherein each of the curved grooves is an annular groove. 15. The light source module according to claim 14, wherein the at least one light-incident surface is two opposite light-incident surfaces, and the at least one light-emitting element is two light-emitting elements respectively arranged beside the two light-incident surfaces , the light source module further includes a control unit electrically connected to the two light emitting elements to drive the two light emitting elements to blink alternately. 16 . The light source module as claimed in claim 15 , wherein an average inclination angle of each curved inclined reflective surface is greater than or equal to 30 degrees and less than or equal to 50 degrees. 17 . The light source module according to claim 15 , wherein an average inclination angle of each curved inclined reflective surface is greater than or equal to 40 degrees and less than or equal to 60 degrees. 18. The light source module according to claim 9, wherein the curved inclined reflective surface of the curved groove is located at a curvature between the curved backlight side of the curved groove and the curved groove between centers. 19. The light source module according to claim 9, wherein the curved backlight side of the curved groove is located at a curvature between the curved inclined reflective surface of the curved groove and the curved groove between centers. 20. The light source module as claimed in claim 9, further comprising a reflection unit disposed on the second surface.

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