Optical waveguide device and light output system

Abstract

The present invention discloses a light guide device, comprising: a light source and a light guide plate. A light homogenizing structure is provided at the bottom end of the light guide plate facing the light source, and the light homogenizing structure is fixedly connected to the light guide plate; the light guide plate includes a main body, a first inclined portion and a second inclined portion. The first inclined portion and the second inclined portion are respectively located on the left and right sides of the main body, and both the first inclined portion and the second inclined portion are fixedly connected to the main body, and the tops of the first inclined portion and the second inclined portion are both higher than the top of the main body; wherein, the light homogenizing structure includes a first light homogenizing portion, a second light homogenizing portion and a third light homogenizing portion. The first light homogenizing portion and the third light homogenizing portion are respectively located on the left and right sides of the second light homogenizing portion, and both the first light homogenizing portion and the third light homogenizing portion are fixedly connected to the second light homogenizing portion; the first light homogenizing portion is used to diverge the light emitted by the light source towards the first inclined portion, the third light homogenizing portion is used to diverge the light emitted by the light source towards the second inclined portion, and the second light homogenizing portion is used to diverge the light emitted by the light source towards the main body. By using the present invention, the light guide plate can be evenly illuminated.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive headlights, and particularly to a light guide device and a light-emitting system. Background Art

[0002] With the iterative development of automobiles, the structures of chassis, body, etc. are becoming increasingly mature, and it is increasingly difficult to form differentiation. Therefore, the importance of appearance differentiation competition, including headlights, has become increasingly prominent. How to achieve more complex lighting effects with fewer light sources has become a research hotspot.

[0003] Due to advantages such as the total internal reflection principle and high energy utilization rate, light guides are commonly used in automotive headlight lighting systems. However, when the angle between the extension direction of the light guide plate and the light-emitting direction of the light source is too large (i.e., the angle exceeds 15°), the phenomenon of uneven brightness will occur, that is, the area near the light source is brighter, while the area far from the light source is darker, thus affecting the visual experience. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in order to solve the technical problem of uneven brightness of the light guide plate in the prior art, the present invention provides a light guide device that can evenly illuminate the light guide plate.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a light guide device, including: a light source and a light guide plate. A light homogenizing structure is provided at the bottom end of the light guide plate facing the light source, and the light homogenizing structure is fixedly connected to the light guide plate; the light guide plate includes a main body, a first inclined portion, and a second inclined portion. The first inclined portion and the second inclined portion are respectively located on the left and right sides of the main body, and both the first inclined portion and the second inclined portion are fixedly connected to the main body, and the tops of the first inclined portion and the second inclined portion are both higher than the top of the main body; wherein, the light homogenizing structure includes a first light homogenizing portion, a second light homogenizing portion, and a third light homogenizing portion. The first light homogenizing portion and the third light homogenizing portion are respectively located on the left and right sides of the second light homogenizing portion, and both the first light homogenizing portion and the third light homogenizing portion are fixedly connected to the second light homogenizing portion; the first light homogenizing portion is used to diverge the light emitted by the light source towards the first inclined portion, the third light homogenizing portion is used to diverge the light emitted by the light source towards the second inclined portion, and the second light homogenizing portion is used to diverge the light emitted by the light source towards the main body.

[0006] Further, the first light homogenizing portion includes a plurality of first light homogenizing units, and the plurality of first light homogenizing units are connected end to end in sequence. The first light homogenizing unit includes a first connection surface, a first light incident surface, a second light incident surface, a third light incident surface, a second connection surface, and a first reflection surface; the first connection surface, the first light incident surface, the second light incident surface, the third light incident surface, the second connection surface, and the first reflection surface are connected in sequence from left to right.

[0007] Furthermore, both the first light incident surface and the second connection surface are horizontal planes, and the first connection surface, the second light incident surface, the third light incident surface, and the first reflection surface are all inclined planes; the inclination directions of the second light incident surface and the third light incident surface are opposite, and the connection between the second light incident surface and the third light incident surface is an arc surface that is recessed away from the light source; the inclination direction of the first connection surface is the same as that of the third light incident surface, and the inclination direction of the first reflection surface is the same as that of the second light incident surface.

[0008] Furthermore, the first reflection surface of the previous first light homogenizing unit and the first connection surface of the subsequent first light homogenizing unit are connected by a first horizontal plane, and a recessed shape that is recessed towards the body is formed among the first reflection surface, the first horizontal plane, and the first connection surface.

[0009] Furthermore, the third light homogenizing part includes a plurality of third light homogenizing units that are connected end to end in sequence. The third light homogenizing unit includes a third connection surface, a fourth light incident surface, a fifth light incident surface, a sixth light incident surface, a fourth connection surface, and a second reflection surface; the third connection surface, the fourth light incident surface, the fifth light incident surface, the sixth light incident surface, the fourth connection surface, and the second reflection surface are connected in sequence from right to left.

[0010] Furthermore, both the fourth light incident surface and the fourth connection surface are horizontal planes, and the third connection surface, the fifth light incident surface, the sixth light incident surface, and the second reflection surface are all inclined planes; the inclination directions of the fifth light incident surface and the sixth light incident surface are opposite, and the connection between the fifth light incident surface and the sixth light incident surface is an arc surface that is recessed away from the light source; the inclination direction of the third connection surface is the same as that of the sixth light incident surface, and the inclination direction of the second reflection surface is the same as that of the fifth light incident surface.

[0011] Furthermore, the second reflection surface of the previous third light homogenizing unit and the third connection surface of the subsequent third light homogenizing unit are connected by a second horizontal plane, and a recessed shape that is recessed towards the body is formed among the second reflection surface, the second horizontal plane, and the third connection surface.

[0012] Furthermore, the inclination direction of the first inclined part is the same as that of the first connection surface, the inclination direction of the second inclined part is the same as that of the third connection surface, and the inclination directions of the first connection surface and the third connection surface are opposite.

[0013] Furthermore, taking the plane perpendicular to the light guide plate as the reference plane Y, the reference plane Y is a vertical plane, and the angles between the first connection surface and the third connection surface and the reference plane Y are both A, and the angles between the first inclined part and the second inclined part and the reference plane Y are both B; the angle A is greater than the angle B.

[0014] Further, taking the plane perpendicular to the light guide plate as the reference plane Y, the reference plane Y is a vertical plane, the included angles between the third light incident surface and the sixth light incident surface and the reference plane Y are both C, the included angles between the first reflecting surface and the second reflecting surface and the reference plane Y are both D, the included angle C is greater than the included angle D, and the height of the first reflecting surface is greater than the height of the third light incident surface, and the height of the second reflecting surface is greater than the height of the sixth light incident surface.

[0015] Further, diffusion patterns are provided on one side surface of the light homogenizing structure.

[0016] Further, a homogenizing layer is further provided between the light homogenizing structure and the light source.

[0017] The present invention further provides a light emitting system, including: a back plate, and the above-mentioned light guide device, and the back plate is connected to the light guide plate.

[0018] The beneficial effect of the present invention is that for the light guide device of the present invention, by providing a light homogenizing structure, the first light homogenizing part diverges the light emitted by the light source towards the first inclined part, and the third light homogenizing part diverges the light emitted by the light source towards the second inclined part, so that the top end (i.e., the end far from the light source) of the light guide plate with a large inclination angle can also be illuminated, keeping the overall brightness of the light guide plate uniform and presenting a better visual effect. Description of the Drawings

[0019] The present invention will be further described below with reference to the drawings and embodiments.

[0020] Figure 1 is a schematic structural diagram of the light guide device of the present invention.

[0021] Figure 2 is a schematic diagram of the propagation of light rays in the light guide device of the present invention.

[0022] Figure 3 is an enlarged view of the first light homogenizing unit of the present invention.

[0023] Figure 4 is a schematic diagram of the propagation of light rays in the first light homogenizing unit of the present invention.

[0024] Figure 5 is an enlarged view of the third light homogenizing unit of the present invention.

[0025] Figure 6 is a schematic diagram of the propagation of the light source in the third light homogenizing unit of the present invention.

[0026] Figure 7 is a cross-sectional view of the light guide plate of the present invention.

[0027] Figure 8 is an enlarged view of the second light homogenizing unit of the present invention.

[0028] In the figure: 1. Light source; 2. Light guide plate; 3. Light homogenizing structure; 4. Diffusion pattern; 21. Body; 22. First inclined part; 23. Second inclined part; 31. First light homogenizing part; 32. Second light homogenizing part; 33. Third light homogenizing part; 34. First light homogenizing unit, 341. First connection surface, 342. First light incident surface, 343. Second light incident surface, 344. Third light incident surface, 345. Second connection surface, 346. First reflection surface, 347. First horizontal plane; 35. Third light homogenizing unit, 351. Third connection surface, 352. Fourth light incident surface, 353. Fifth light incident surface, 354. Sixth light incident surface, 355. Fourth connection surface, 356. Second reflection surface, 357. Second horizontal plane; 36. Second light homogenizing unit. Detailed implementation mode

[0029] Now, the present invention will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only showing the basic structure of the present invention in a schematic way, so they only show the components related to the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0031] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0032] As Figure 1 to Figure 2As shown in the figure, an optical waveguide device includes a light source 1 and a light guide plate 2. The number of light sources 1 can be multiple. The light source 1 can be, for example, an LED. The light-emitting angle of the LED is conical, and it can emit light beams at different angles simultaneously. One end of the light guide plate 2 facing the light source 1 is provided with a light homogenizing structure 3, and the light homogenizing structure 3 is fixedly connected to the light guide plate 2. Multiple light sources 1 can be arranged directly below the light guide plate 2, and the light-emitting surface of the light source 1 faces the light homogenizing structure 3 of the light guide plate 2 directly. The light guide plate 2 includes a main body 21, a first inclined portion 22, and a second inclined portion 23. The first inclined portion 22 and the second inclined portion 23 are respectively located on the left and right sides of the main body 21. The first inclined portion 22 and the second inclined portion 23 are both fixedly connected to the main body 21, and the tops of the first inclined portion 22 and the second inclined portion 23 are both higher than the top of the main body 21. In other words, the light guide plate 2 as a whole presents a "concave" shape, and the left and right sides of the light guide plate 2 are inclined.

[0033] The light homogenizing structure 3 includes a first light homogenizing portion 31, a second light homogenizing portion 32, and a third light homogenizing portion 33. The first light homogenizing portion 31 and the third light homogenizing portion 33 are respectively located on the left and right sides of the second light homogenizing portion 32, and the first light homogenizing portion 31 and the third light homogenizing portion 33 are both fixedly connected to the second light homogenizing portion 32. For example, the first light homogenizing portion 31, the second light homogenizing portion 32, and the third light homogenizing portion 33 can be integrally formed, and the second light homogenizing portion 32 is located between the first light homogenizing portion 31 and the third light homogenizing portion 33. The first light homogenizing portion 31 and the third light homogenizing portion 33 are symmetrically arranged about the vertical center line of the second light homogenizing portion 32. The first light homogenizing portion 31, the second light homogenizing portion 32, and the third light homogenizing portion 33 are used to receive the light beams emitted by the light source 1. For example, the first light homogenizing portion 31 is used to diverge the light emitted by the light source 1 towards the first inclined portion 22, the third light homogenizing portion 33 is used to diverge the light emitted by the light source 1 towards the second inclined portion 23, and the second light homogenizing portion 32 is used to diverge the light emitted by the light source 1 towards the main body 21. Specifically, the first light homogenizing portion 31 and the second light homogenizing portion 33 can reflect the light beams with a relatively large angle emitted by the light source 1, making the overall light-emitting effect of the light guide plate 2 more uniform.

[0034] As Figure 3As shown in the figure, the first light homogenizing part 31 includes a plurality of first light homogenizing units 34. The plurality of first light homogenizing units 34 are connected end to end in sequence. The first light homogenizing unit 34 includes a first connection surface 341, a first light incident surface 342, a second light incident surface 343, a third light incident surface 344, a second connection surface 345, and a first reflection surface 346. The first connection surface 341, the first light incident surface 342, the second light incident surface 343, the third light incident surface 344, the second connection surface 345, and the first reflection surface 346 are connected in sequence from left to right. Both the first light incident surface 342 and the second connection surface 345 are horizontal planes, and the first connection surface 341, the second light incident surface 343, the third light incident surface 344, and the first reflection surface 346 are all inclined surfaces. The inclination directions of the second light incident surface 343 and the third light incident surface 344 are opposite, and the connection part between the second light incident surface 343 and the third light incident surface 344 is an arc surface recessed in the direction away from the light source 1. The inclination direction of the first connection surface 341 is the same as that of the third light incident surface 344, and the inclination direction of the first reflection surface 346 is the same as that of the second light incident surface 343. In this way, light rays emitted from the light source 1 at different angles can all enter the first light homogenizing unit 34. The first reflection surface 346 of the previous first light homogenizing unit 34 is connected to the first connection surface 341 of the next first light homogenizing unit 34 through a first horizontal plane 347, and a recessed shape recessed in the direction of the main body 21 is formed among the first reflection surface 346, the first horizontal plane 347, and the first connection surface 341.

[0035] Specifically, a light source 1 is provided below each first light homogenizing unit 34, and the light source 1 is as close as possible to the first light homogenizing unit 34. As Figure 4 shown in the figure, when the light source 1 emits light beams at different angles, let the light beam diverging to the left from the light source 1 be light beam one, the light beam diverging to the middle be light beam two, and the light beam diverging to the right be light beam three. Light beam one can enter the light guide plate 2 through the first light incident surface 342 and the second light incident surface 343. Light beam two can enter the light guide plate 2 through the second light incident surface 343 and the third light incident surface 344. Light beam three can enter the light homogenizing structure 3 through the third light incident surface 344 and be reflected by the first reflection surface 346 and then enter the light guide plate 2. Through the structural design of the light homogenizing unit, light rays emitted from the light source 1 at different angles can all enter the light guide plate 2, and more light rays are emitted in the direction of the first inclined part 22, making the overall light emission brightness of the light guide plate 2 more uniform.

[0036] Specifically, in the first light homogenizing unit 34, the first connection surface 341 and the third light incident surface 344 are inclined to the left, and the second light incident surface 343 and the first reflection surface 346 are inclined to the right. The inclination angle of the first reflection surface 346 should not be too large, otherwise the reflection effect cannot be achieved.

[0037] As Figure 5As shown in the figure, the third light homogenizing part 33 includes a plurality of third light homogenizing units 35. The plurality of third light homogenizing units 35 are connected end to end in sequence. The third light homogenizing unit 35 includes a third connecting surface 351, a fourth light incident surface 352, a fifth light incident surface 353, a sixth light incident surface 354, a fourth connecting surface 355 and a second reflecting surface 356. The third connecting surface 351, the fourth light incident surface 352, the fifth light incident surface 353, the sixth light incident surface 354, the fourth connecting surface 355 and the second reflecting surface 356 are connected in sequence from right to left. Both the fourth light incident surface 352 and the fourth connecting surface 355 are horizontal planes, and the third connecting surface 351, the fifth light incident surface 353, the sixth light incident surface 354 and the second reflecting surface 356 are all inclined planes. The inclination directions of the fifth light incident surface 353 and the sixth light incident surface 354 are opposite, and the connection part between the fifth light incident surface 353 and the sixth light incident surface 354 is an arc surface recessed in the direction away from the light source 1. The inclination direction of the third connecting surface 351 is the same as that of the sixth light incident surface 354, and the inclination direction of the second reflecting surface 356 is the same as that of the fifth light incident surface 353. In this way, light rays emitted from the light source 1 at different angles can all enter the third light homogenizing unit 35. The second reflecting surface 356 of the previous third light homogenizing unit 35 is connected to the third connecting surface 351 of the next third light homogenizing unit 35 through a second horizontal plane 357, and a recessed shape recessed in the direction of the main body 21 is formed between the second reflecting surface 356, the second horizontal plane 357 and the third connecting surface 351. In other words, the structure of the third light homogenizing unit 35 is the same as that of the first light homogenizing unit 34. However, the third light homogenizing unit 35 and the first light homogenizing unit 34 are symmetrically arranged left and right along the center line of the main body 21.

[0038] Similarly, a light source 1 is provided below each third light homogenizing unit 35, and the light source 1 is as close as possible to the third light homogenizing unit 35. As Figure 6 shown in the figure, when the light source 1 emits light beams at different angles, light beam one can enter the light guide plate 2 through the fourth light incident surface 352 and the fifth light incident surface 353, light beam two can enter the light guide plate 2 through the fifth light incident surface 353 and the sixth light incident surface 354, and light beam three can enter the light homogenizing structure 3 through the sixth light incident surface 354 and be reflected by the second reflecting surface 356 and then enter the light guide plate 2. Through the structural design of the light homogenizing unit, light rays emitted from the light source 1 at different angles can all enter the light guide plate 2, and more light rays are emitted in the direction of the second inclined part 23, making the overall light emission brightness of the light guide plate 2 more uniform. Specifically, in the third light homogenizing unit 35, the third connecting surface 351 and the sixth light incident surface 354 are inclined to the left, the fifth light incident surface 353 and the second reflecting surface 356 are inclined to the right, and the inclination angle of the second reflecting surface 356 should not be too large, otherwise the reflection effect cannot be achieved.

[0039] Further, the inclination direction of the first inclined portion 22 is the same as that of the first connection surface 341, the inclination direction of the second inclined portion 23 is the same as that of the third connection surface 351, and the inclination directions of the first connection surface 341 and the third connection surface 351 are opposite. Taking the plane perpendicular to the light guide plate 2 as the reference plane Y, the reference plane Y is a vertical plane. The angles between the first connection surface 341 and the third connection surface 351 and the reference plane Y are both A, and the angles between the first inclined portion 22 and the second inclined portion 23 and the reference plane Y are both B; the angle A is greater than the angle B. In other words, the inclination angle of the first connection surface 341 is greater than the inclination angle of the first inclined portion 22, and the inclination angle of the third connection surface 351 is greater than the inclination angle of the second inclined portion 23. In this way, it is possible to prevent the light rays emitted by the light source 1 at a large angle and the light rays reflected by the first reflecting surface 346 and the second reflecting surface 356 from directly exiting from the first connection surface 341 and the third connection surface 351, resulting in light leakage. For example, the angle between the first inclined portion 22 and the horizontal plane can be 40°-70°, and the angle between the second inclined portion 23 and the horizontal plane can be 40°-70°.

[0040] Taking the plane perpendicular to the light guide plate 2 as the reference plane Y, the reference plane Y is a vertical plane. The angles between the third light incident surface 344 and the sixth light incident surface 354 and the reference plane Y are both C, and the angles between the first reflecting surface 346 and the second reflecting surface 356 and the reference plane Y are both D. The angle C is greater than the angle D, and the height of the first reflecting surface 346 is greater than the height of the third light incident surface 344, and the height of the second reflecting surface 356 is greater than the height of the sixth light incident surface 354. In this way, in the first light homogenizing unit 34, the light beam diverging to the right from the light source 1 can be reflected by the first reflecting surface 346 and refracted in the direction of the first inclined portion 22 for exit; in the third light homogenizing unit 35, the light rays diverging to the left from the light source 1 can be reflected by the second reflecting surface 356 and refracted in the direction of the second inclined portion 23 for exit, so that a brighter effect can also be presented at a position of the light guide plate 2 farther from the light source 1, ensuring the uniformity of the overall light-emitting effect of the light guide plate 2.

[0041] As Figure 8 shown, the second light homogenizing portion 32 includes a plurality of second light homogenizing units 36, and the plurality of second light homogenizing units 36 are connected end to end in sequence. The second light homogenizing unit 36 can be semi-elliptical, and adjacent two second light homogenizing units 36 can be connected by an inclined surface. A light source 1 is provided below each second light homogenizing unit 36, and the width of the second light homogenizing unit 36 is matched with the width of the light-emitting surface of the light source 1 for diffusing the light rays emitted by the light source 1.

[0042] In this embodiment, a diffusion pattern 4 is provided on one side surface of the light homogenizing structure 3. Specifically, the diffusion pattern 4 is provided on the front side surface of the light homogenizing structure 3. Please refer to Figure 7, since the light-emitting angle of the light source 1 is conical, and the light guide plate 2 and the light homogenizing structure 3 have a certain thickness, a part of the light emitted by the light source 1 can directly emit from the front side of the light homogenizing structure 3, and a part of the light can emit from the front side after being reflected by the rear side of the light homogenizing structure 3. When the light emits from the front side, the diffusion pattern 5 can diffuse the light to achieve lighting. The diffusion pattern 4 can be textures such as vertical stripes and wavy lines, which are not limited here and can be designed according to actual needs.

[0043] In this embodiment, a homogenizing layer (not shown in the figure) is further provided between the light homogenizing structure 3 and the light source 1. The homogenizing layer is used to homogenize the light emitted by the light source 1, and can be, for example, a material with good diffusion performance or good heat dissipation performance.

[0044] The present invention also provides a light-emitting system, including the above-mentioned light guide device and a back plate. The back plate is arranged on the rear side of the light guide plate 2 and is fixedly connected to the light guide plate 2. Specifically, the light guide plate is pink or transparent. In this way, when the LED light source emits red light and propagates in the light guide plate, less light is absorbed and the propagation distance is long; the back plate is pink or white, and the back plate is made of an opaque material, which has a strong reflection effect on red light, improving the utilization rate of light energy and the uniformity of light emission.

[0045] In summary, for the light guide device of the present invention, by arranging the light homogenizing structure 3 at the bottom of the light guide plate 2, and the first light homogenizing part 31 and the third light homogenizing part 33 are symmetrically arranged about the center line of the second light homogenizing part 32, a part of the light emitted by the light source 1 can be reflected by the first light homogenizing part 31 and the third light homogenizing part 33 and diverge in the direction of the two inclined parts, so that the top ends of the inclined parts on both sides of the light guide plate 2 can also be evenly lit, making the whole light guide plate 2 emit light evenly.

[0046] Taking the above-mentioned ideal embodiment of the present invention as an inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A light guide device, characterized in that, it includes: a light source (1), and a light guide plate (2), a light homogenizing structure (3) is provided at the bottom end of the light guide plate (2) facing the light source (1), and the light homogenizing structure (3) is fixedly connected to the light guide plate (2); the light guide plate (2) includes a main body (21), a first inclined portion (22) and a second inclined portion (23), the first inclined portion (22) and the second inclined portion (23) are respectively located on the left and right sides of the main body (21), the first inclined portion (22) and the second inclined portion (23) are both fixedly connected to the main body (21), and the tops of the first inclined portion (22) and the second inclined portion (23) are both higher than the top of the main body (21); the light homogenizing structure (3) includes a first light homogenizing portion (31), a second light homogenizing portion (32) and a third light homogenizing portion (33), the first light homogenizing portion (31) and the third light homogenizing portion (33) are respectively located on the left and right sides of the second light homogenizing portion (32), and the first light homogenizing portion (31) and the third light homogenizing portion (33) are both fixedly connected to the second light homogenizing portion (32); the first light homogenizing portion (31) is used for diverging the light emitted by the light source (1) towards the first inclined portion (22), the third light homogenizing portion (33) is used for diverging the light emitted by the light source (1) towards the second inclined portion (23), and the second light homogenizing portion (32) is used for diverging the light emitted by the light source (1) towards the main body (21); the first light homogenizing portion (31) includes a plurality of first light homogenizing units (34), the plurality of first light homogenizing units (34) are connected end to end in sequence, and the first light homogenizing unit (34) includes a first connection surface (341), a first light incident surface (342), a second light incident surface (343), a third light incident surface (344), a second connection surface (345) and a first reflection surface (346); the first connection surface (341), the first light incident surface (342), the second light incident surface (343), the third light incident surface (344), the second connection surface (345) and the first reflection surface (346) are connected in sequence from left to right; both the first light incident surface (342) and the second connection surface (345) are horizontal planes, and the first connection surface (341), the second light incident surface (343), the third light incident surface (344) and the first reflection surface (346) are all inclined planes; the inclination directions of the second light incident surface (343) and the third light incident surface (344) are opposite, and the connection portion between the second light incident surface (343) and the third light incident surface (344) is an arc surface recessed in the direction away from the light source (1); the inclination direction of the first connection surface (341) is the same as the inclination direction of the third light incident surface (344), and the inclination direction of the first reflection surface (346) is the same as the inclination direction of the second light incident surface (343); The first reflecting surface (346) of the previous first light homogenizing unit (34) is connected to the first connecting surface (341) of the subsequent first light homogenizing unit (34) through a first horizontal plane (347), and a concave shape that is recessed toward the body (21) is formed among the first reflecting surface (346), the first horizontal plane (347), and the first connecting surface (341).

2. The light guide device according to claim 1, wherein, the third light homogenizing part (33) includes a plurality of third light homogenizing units (35) that are connected end to end in sequence. The third light homogenizing unit (35) includes a third connecting surface (351), a fourth light incident surface (352), a fifth light incident surface (353), a sixth light incident surface (354), a fourth connecting surface (355), and a second reflecting surface (356); the third connecting surface (351), the fourth light incident surface (352), the fifth light incident surface (353), the sixth light incident surface (354), the fourth connecting surface (355), and the second reflecting surface (356) are connected in sequence from right to left.

3. The light guide device according to claim 2, wherein, both the fourth light incident surface (352) and the fourth connecting surface (355) are horizontal planes, and both the third connecting surface (351), the fifth light incident surface (353), the sixth light incident surface (354), and the second reflecting surface (356) are inclined surfaces; the inclination directions of the fifth light incident surface (353) and the sixth light incident surface (354) are opposite, and the connection part between the fifth light incident surface (353) and the sixth light incident surface (354) is an arc surface that is recessed away from the light source (1); the inclination direction of the third connecting surface (351) is the same as the inclination direction of the sixth light incident surface (354), and the inclination direction of the second reflecting surface (356) is the same as the inclination direction of the fifth light incident surface (353).

4. The light guide device according to claim 3, wherein, the second reflecting surface (356) of the previous third light homogenizing unit (35) is connected to the third connecting surface (351) of the subsequent third light homogenizing unit (35) through a second horizontal plane (357), and a concave shape that is recessed toward the body (21) is formed among the second reflecting surface (356), the second horizontal plane (357), and the third connecting surface (351).

5. The light guide device according to claim 3, wherein, the inclination direction of the first inclined part (22) is the same as the inclination direction of the first connecting surface (341), the inclination direction of the second inclined part (23) is the same as the inclination direction of the third connecting surface (351), and the inclination directions of the first connecting surface (341) and the third connecting surface (351) are opposite.

6. The light guide device according to claim 5, wherein, Taking the plane perpendicular to the light guide plate (2) as the reference plane Y, the reference plane Y is a vertical plane, the included angles between the first connecting surface (341) and the third connecting surface (351) and the reference plane Y are both A, and the included angles between the first inclined portion (22) and the second inclined portion (23) and the reference plane Y are both B; the included angle A is greater than the included angle B.

7. The light guide device according to claim 4, characterized in that Taking the plane perpendicular to the light guide plate (2) as the reference plane Y, the reference plane Y is a vertical plane, the included angles between the third light incident surface (344) and the sixth light incident surface (354) and the reference plane Y are both C, the included angles between the first reflecting surface (346) and the second reflecting surface (356) and the reference plane Y are both D, the included angle C is greater than the included angle D, and the height of the first reflecting surface (346) is greater than the height of the third light incident surface (344), and the height of the second reflecting surface (356) is greater than the height of the sixth light incident surface (354).

8. The light guide device according to claim 1, characterized in that Diffusion patterns (4) are provided on one side surface of the light homogenizing structure (3).

9. The light guide device according to claim 1, characterized in that A homogenizing layer is further provided between the light homogenizing structure (3) and the light source (1).

10. An outgoing light system, characterized in that comprising: a back plate, and the light guide device according to any one of claims 1-9, the back plate being connected to the light guide plate.

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