Light guide plate assembly structure with good uniformity

Abstract

The utility model discloses a light guide plate assembly structure with good uniformity, which comprises a circular light guide, an LED light source and a light guide plate, the LED light source and the light guide plate are arranged at the end part of the circular light guide, one plate surface of the light guide plate is provided with a fully reflecting surface, and the other plate surface of the light guide plate is arranged as a first light emitting surface for realizing surface light emitting; the first light incoming surface in the thickness direction of the light guide plate corresponds to the second light outgoing surface of the circular light guide and is used for receiving light transmitted by the circular light guide. Light rays emitted by the LED light source enter along the end of the circular light guide to form a thin and long light band, the light rays propagating in the circular light guide can be emitted out from the second light-emitting face of the circular light guide, enter the light guide plate and can be emitted out from the first light-emitting face of the light guide plate after passing through the light guide plate, the large-area surface light emitting effect is achieved, and through two times of light diffusion of the circular light guide and the light guide plate, the large-area surface light emitting effect is achieved. The method has the advantage of good uniformity. The circular light guide is in butt joint with the LED light sources, light uniformity can be improved, meanwhile, the number of the LED light sources is reduced, and the advantage of saving cost is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of car lamp accessories, in particular to a light guide plate assembly structure with good uniformity. BACKGROUND

[0002] With the people's higher and higher requirements for the appearance of the car, more and more car lamps have higher requirements for regional lighting effect and light color.

[0003] The light guide structure used in the car lamp plays an important role in the regional lighting effect, especially the light guide structure can improve the light uniformity effect.

[0004] The Chinese utility model patent with the application number 202323101842.X discloses a light guide structure, which comprises a circuit board, a light source and a light guide strip, the light source is fixed on the circuit board, the light guide strip is arranged on the side of the light source away from the circuit board, and further comprises a cover plate connected between the circuit board and the light guide strip, configured to shield the bright spot formed by the direct light of the light source and the high-energy bright area of the incident end area of the light guide strip. In this technical solution, the light emitted by the light source enters the light guide strip through the incident end of the light guide strip and is emitted from the light guide strip through the light outlet of the light guide strip. Since the cover plate is arranged between the circuit board and the light guide strip, it can shield the bright spot formed by the direct light of the light source and the high-energy bright area of the incident end area of the light guide strip, avoiding the bright spot in the incident end area, ensuring the light emitting width, and making the light uniform.

[0005] However, the above light guide structure only uses the light guide strip to achieve the effect of uniform light, and has the advantages of fewer LED light sources and cost saving, but the lighting is only a thin light strip, the light uniformity is not high enough, and it cannot meet the large-area lighting to realize the effect of large-panel light emission.

[0006] Therefore, the present inventors propose the following technical solution. UTILITY MODEL CONTENT

[0007] The utility model aims at overcoming the defects of the prior art, and provides a light guide plate assembly structure with good uniformity.

[0008] In order to solve the above technical problems, the utility model adopts the following technical scheme: the light guide plate assembly structure with good uniformity comprises a circular light guide and an LED light source installed at the end of the circular light guide, and further comprises a light guide plate, one plate surface of the light guide plate is provided with a total reflection surface, the other plate surface of the light guide plate is provided with a first light outlet surface for realizing surface light emission, and the first light inlet surface in the thickness direction of the light guide plate corresponds to the second light outlet surface of the circular light guide and is used for receiving the light propagated by the circular light guide.

[0009] Further in the technical solution, the thickness of the light guide plate gradually decreases from one end to the other end; wherein the total reflection surface is an inclined surface, which is inclined relative to the first light exit surface.

[0010] Further in the technical solution, a light uniformity plate is further arranged between the first light entrance surface of the light guide plate and the second light exit surface of the circular light guide, and the light propagated by the circular light guide is diffused by the light uniformity plate before entering the first light entrance surface.

[0011] Further in the technical solution, the total reflection surface is further provided with a plurality of first light guide teeth which are recessed from outside to inside and are spaced apart.

[0012] Further in the technical solution, the first light exit surface is further provided with a light exit skin pattern for improving light uniformity.

[0013] Further in the technical solution, the first light exit surface is further provided with a light plane on both sides, which is located outside the light exit skin pattern.

[0014] Further in the technical solution, the light exit skin pattern is a plurality of continuously distributed wavy grooves or V-shaped grooves.

[0015] Further in the technical solution, the rear side of the circular light guide is provided with a plurality of second light guide teeth which are recessed from outside to inside and are spaced apart.

[0016] After the above technical solution is adopted, the present application has the following advantages compared with the prior art: in specific use, the light emitted by the LED light source enters along the end of the circular light guide, so that the circular light guide is lit to form an elongated light strip, and the light propagated in the circular light guide is emitted from the second light exit surface and enters the light guide plate along the first light entrance surface in the thickness direction of the light guide plate, and is emitted from the first light exit surface of the light guide plate after passing through the light guide plate, so as to realize the large-area surface light emitting effect, and since the light guide plate is provided with the total reflection surface, most or even all of the light can be reflected to the first light exit surface to complete the uniform lighting of the light guide plate, so that the light emitting effect of the first light exit surface is better and the light is more uniform, and the present application has the advantage of good uniformity through the two diffusions of light by the circular light guide and the light guide plate, so as to meet the use requirements of the lamp. In addition, the present application adopts the circular light guide to butt joint the LED light source, which can improve the light uniformity while reducing the number of LED light sources, so as to save the cost. Furthermore, a light uniformity plate is further arranged between the first light entrance surface of the light guide plate and the second light exit surface of the circular light guide, and the light entering the light guide plate is diffused by the light uniformity plate, so as to further improve the light uniformity effect. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 is a perspective view of an embodiment of the present application;

[0018] Fig. 2 is another perspective view of the embodiment one of the utility model;

[0019] Fig. 3 is the light path propagation diagram of the embodiment one of the utility model;

[0020] Fig. 4 is the perspective view of the embodiment one of the utility model;

[0021] Fig. 5 is another perspective view of the embodiment one of the utility model;

[0022] Fig. 6 is the light path propagation diagram of the embodiment one of the utility model. DETAILED DESCRIPTION

[0023] The utility model is further explained in connection with specific embodiment and drawing.

[0024] Embodiment one

[0025] see Figs. 1-3 As shown in, it is a light guide plate assembly structure with good uniformity, it includes round light guide 1 and the LED light source 2 installed in the end of round light guide 1.

[0026] The utility model also includes light guide plate 3, a board surface of this light guide plate 3 is provided with total reflection surface 31, another board surface of this light guide plate 3 is set to be used to realize the first light outlet surface 32 of surface light emitting, the first light inlet surface 33 of thickness direction of this light guide plate 3 corresponds with the second light outlet surface 11 of round light guide 1 and is used to receive the light ray propagation of round light guide 1.The utility model adopts round light guide 1 and connects LED light source 2, it can reduce the number of LED light source while improving the light uniformity, reaches the advantage of saving cost.In specific use, the light ray of LED light source 2 enters along the end of round light guide 1, makes round light guide 1 form an elongated light band after lighting, and the light ray propagation in this round light guide 1 will be emitted from its second light outlet surface 11, and is shot into light guide plate 3 along the first light inlet surface 33 of thickness direction of light guide plate 3, will be emitted from the first light outlet surface 32 of light guide plate 3 after passing through light guide plate 3, to realize the surface light emitting effect of large area, simultaneously, since light guide plate 3 is provided with total reflection surface 31, it can reflect most or even all light rays to the first light outlet surface 32, completes the uniform lighting of light guide plate 3, and then makes the light emitting effect of first light outlet surface 32 better, and the light ray is more uniform, and the utility model passes through round light guide 1 and light guide plate 3 and diffuses light twice, it has the advantage of good uniformity to meet the use requirement of lamp.

[0027] In order to further improve the uniformity of light effect, the utility model discloses still made the following design: the first light entrance surface 33 of light guide plate 3 with the second light exit surface 11 of round light guide 1 still is provided with a light uniformity plate 4, and the light that the round light guide 1 spreads diffuses after entering the first light entrance surface 33 again and shoots. That is to say, the light of LED light source 2 is entered along the end of round light guide 1, makes the round light guide 1 form an elongated light band after lighting, and the light that the round light guide 1 spreads will be shot from its second light exit surface 11, and is entered light uniformity plate 4, and the light is then entered light guide plate 3 along the first light entrance surface 33 of the thickness direction of light guide plate 3 after the secondary diffusion of the light uniformity plate 4, and the light is shot from the first light exit surface 32 of light guide plate 3 after passing through light guide plate 3, to realize the large-area surface light emitting effect, simultaneously, since light guide plate 3 is provided with total reflection surface 31, it can reflect most or even all light to the first light exit surface 32, completes the uniform lighting of light guide plate 3, and then makes the light emitting effect of first light exit surface 32 better, and the light is more uniform, and the utility model discloses three times diffusion of light through round light guide 1, light uniformity plate 4 and light guide plate 3, and it has the advantages of good uniformity, to meet the use requirement of lamp.

[0028] In the embodiment, the thickness dimension of the light guide plate 3 gradually decreases from one end to the other end; wherein the total reflection surface 31 is an inclined surface, which is inclined relative to the first light exit surface 32, so that the total reflection surface 31 can better reflect light to the first light exit surface 32, thereby improving the uniform lighting effect of the light guide plate, i.e. the uniformity is better.

[0029] In the embodiment, the total reflection surface 31 is also provided with a plurality of first light guide teeth 311 recessed from outside to inside and spaced apart, which can further improve the uniformity of light by increasing the reflection surface.

[0030] The rear side of the round light guide 1 is provided with a plurality of second light guide teeth 12 recessed from outside to inside and spaced apart, which can further improve the uniformity of light by increasing the reflection surface.

[0031] In summary, in specific use, the light emitted by the LED light source 2 enters along the end of the circular light guide 1, the circular light guide 1 is lighted to form an elongated light band, and the light propagating in the circular light guide 1 is emitted from the second light emitting surface 11 and enters the light guide plate 3 along the first light entering surface 33 in the thickness direction of the light guide plate 3, and is emitted from the first light emitting surface 32 of the light guide plate 3 after passing through the light guide plate 3, so as to realize the large-area surface light emitting effect, and since the light guide plate 3 is provided with the total reflection surface 31, most or even all of the light can be reflected to the first light emitting surface 32, the light guide plate 3 is uniformly lighted, and the light emitting effect of the first light emitting surface 32 is better, the light is more uniform, and the light is twice diffused by the circular light guide 1 and the light guide plate 3, so that the uniformity is good, and the use requirement of the lamp is met. In addition, the circular light guide 1 is used to connect the LED light source 2, so that the light uniformity is improved, and the number of LED light sources is reduced, and the cost is saved. Furthermore, the light guide plate 3 is provided with the light uniformity plate 4 between the first light entering surface 33 and the second light emitting surface 11 of the circular light guide 1, and the light entering the light guide plate 3 is diffused by the light uniformity plate 4, so that the light uniformity effect is further improved.

[0032] Embodiment two:

[0033] The difference between the embodiment two and the above-mentioned embodiment one is that the first light guide tooth is not arranged on the total reflection surface 31, but the light emitting skin pattern 321 for improving the light emitting uniformity is arranged on the first light emitting surface 32. Figs. 4-6 When the light is emitted from the first light emitting surface 32, the light emitting skin pattern improves the light uniformity, and the dark spot phenomenon is avoided. The light emitting skin pattern is a plurality of continuously distributed wave grooves or V-shaped grooves. In the embodiment, the light emitting skin pattern is a plurality of continuously distributed wave grooves.

[0034] The two sides of the first light emitting surface 32 are also provided with light planes which are located outside the light emitting skin pattern.

[0035] In addition to the above, the other structures of the embodiment two are the same as those of the above-mentioned embodiment one, and the same technical effects can be achieved, and the same will not be described again.

[0036] Of course, the above-mentioned is only a specific embodiment of the utility model, and does not limit the utility model implementation range, and the equivalent changes or modifications made according to the structure, features and principles of the utility model patent application range should be included in the utility model patent application range.

Claims

1. A light guide plate assembly structure with good uniformity, comprising a circular light guide (1) and an LED light source (2) mounted at the end of the circular light guide (1), characterized in that: a light guide plate (3) is further included, one plate surface of the light guide plate (3) is provided with a total reflection surface (31), the other plate surface of the light guide plate (3) is provided as a first light emitting surface (32) for realizing surface light emission, and a first light receiving surface (33) in the thickness direction of the light guide plate (3) corresponds to a second light emitting surface (11) of the circular light guide (1) and is used for receiving light propagated by the circular light guide (1).

2. A light guide plate assembly structure having good uniformity according to claim 1, characterized in that: The thickness dimension of the light guide plate (3) gradually decreases from one end to the other end; wherein the total reflection surface (31) is an inclined surface which is inclined relative to the first light emitting surface (32).

3. A light guide plate assembly structure having good uniformity according to claim 2, characterized in that: A light uniformity plate (4) is further arranged between the first light receiving surface (33) of the light guide plate (3) and the second light emitting surface (11) of the circular light guide (1), and the light propagated by the circular light guide (1) is diffused by the light uniformity plate (4) before being incident into the first light receiving surface (33).

4. A light guide plate assembly structure having good uniformity according to any one of claims 1 to 3, characterized in that: The total reflection surface (31) is further provided with a plurality of first light guide teeth (311) which are recessed from outside to inside and are spaced apart.

5. A light guide plate assembly structure having good uniformity according to any one of claims 1 to 3, characterized in that: The first light emitting surface (32) is further provided with a light emitting skin pattern (321) for improving light emitting uniformity.

6. A light guide plate assembly structure having good uniformity according to claim 5, characterized in that: The first light emitting surface (32) is further provided as a light plane on both sides thereof, which is located outside the light emitting skin pattern.

7. A light guide plate assembly structure having good uniformity according to claim 5, wherein: The light emitting skin pattern is a plurality of continuously distributed wavy grooves or V-shaped grooves.

8. A light guide plate assembly structure having good uniformity according to any one of claims 1 to 3, characterized in that: The rear side of the circular light guide (1) is provided with a plurality of second light guide teeth (12) which are recessed from outside to inside and are spaced apart.

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