Light guide structure for improving light guide uniformity and vehicle lamp

Abstract

The utility model discloses a kind of light guide structure for improving light guide uniformity, including light guide body, LED light source;The light guide body includes light guide tooth, light guide diffusion pattern surface, light guide diffusion pattern surface every pattern has two direction adjustment diffusion surface.The utility model uses the form of corn kernel pattern at light guide near light end, the diffusion of every pattern can be controlled, the diffusion size of two directions of corresponding pattern is adjusted to solve the problem of bright spot and dark area generated in simulation design process, simultaneously, since the controllable corn kernel diffusion can also effectively solve the shielding problem of dark area, can be reduced from 40mm shielding to 35mm, improve light guide utilization rate, also can improve the area size of window, meet the modeling design requirement.

Description

Technical Field

[0001] This utility model relates to an optical system structure for use in automotive lights, belonging to the field of automotive lighting technology. Background Technology

[0002] With the rapid development of the automotive lighting industry, the requirements for the appearance and design of automotive lights are becoming increasingly stringent. At the same time, as cost pressures increase, low-cost light guide solutions are being used more and more widely in automotive lights. As the shape of automotive lights becomes more compact, the area obstructed by the light guide is required to be smaller and the uniformity requirement is also increasing. How to achieve a smaller obstructed area at the light guide head while maintaining better uniformity at all angles has become an important research topic in current design.

[0003] The shortcomings and deficiencies of existing technologies: the light guide head needs to block a sufficient area >40mm to ensure uniform illumination, and it is also impossible to precisely control some bright spots and dark areas at various angles. Utility Model Content

[0004] In view of the above problems, the purpose of this utility model is to provide a light guide structure and vehicle lamp that improves the uniformity of light guide.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a light guide structure for improving the uniformity of light guide, comprising a light guide body and an LED light source; the light guide body includes light guide teeth and a light guide diffusion pattern surface, each pattern of the light guide diffusion pattern surface having two directional adjustable diffusion surfaces.

[0006] The light-guiding diffusion patterned surface has a corn kernel structure.

[0007] A vehicle light, including the aforementioned light guide structure.

[0008] This invention employs a corn kernel pattern at the near-incident end of the light guide. The diffusion of each pattern can be controlled. By adjusting the diffusion size in two directions of the corresponding pattern, the problems of bright spots and dark areas generated during the simulation design process can be solved. At the same time, the controllable diffusion of the corn kernel pattern can also effectively solve the problem of dark area occlusion, reducing the occlusion from 40mm to 35mm. This improves the utilization rate of the light guide and also improves the area size of the window, meeting the design requirements. Attached Figure Description

[0009] Appendix Figure 1 Structural cross-sectional view of an embodiment of this utility model patent.

[0010] Appendix Figure 2 Front view of the structure of this utility model patent embodiment.

[0011] Appendix Figure 3This is a cross-sectional view of the near beam guide light end in an embodiment of this utility model patent.

[0012] Appendix Figure 4 This is the front view of a structure with conventional horizontal stripes.

[0013] Appendix Figure 5a , 5b 5c are highlights from various angles of the regular horizontal stripes.

[0014] Appendix Figure 6 It is a typical horizontal stripe pattern with large-angle bright spots and ray tracing.

[0015] Appendix Figure 7a , 7b 7c are illuminated images from various angles of the embodiments of this utility model patent.

[0016] Appendix Figure 8 This is a ray tracing diagram of an embodiment of this utility model patent. Detailed Implementation

[0017] The optical guide structure proposed in this embodiment for improving optical guide uniformity is shown in the appendix. Figure 1 It includes a light guide body 10 and an LED light source 20. The light guide body should include light guide teeth 11 and a light guide diffusion pattern surface 12, each pattern on the light guide diffusion pattern surface having the ability to adjust diffusion in two directions.

[0018] In this embodiment, the light guide diffusion pattern is a corn kernel structure. This structure controls diffusion in two directions: smaller diffusion along the light guide body direction (0° to -20°, 0° to 20°), used to diffuse and distribute light incident on the light guide pattern. The diffusion varies at different locations, effectively improving the light distribution along the light guide body direction and making the light distribution more uniform. Larger diffusion is achieved in the direction perpendicular to the light guide body (-20° to -50°, 20° to 50°).

[0019] Conventional light guides use vertical stripes above the light inlet, and only diffuser is applied in the direction perpendicular to the main body of the light guide (see appendix). Figure 4 It can optimize the problem of triangular dark areas, but it cannot completely eliminate the problem. See appendix. Figure 5a The image shows the illumination effect when viewed from the front. A dark line is still visible in the center of the light guide. Furthermore, because there is no diffusion along the main body of the light guide, the light intensity increases closer to the LED's normal plane, resulting in a noticeable bright area visible at an outer 10-degree angle. (See attached image.) Figure 5b At the same time, when the outer angle is turned to 60 degrees, a triangular dark area near the LED end can be clearly seen.

[0020] This embodiment uses a controllable corn kernel pattern; see attached document. Figure 2This allows for controllability along the direction of the light guide body, resulting in greater diffusion in the LED plane direction compared to other angles. This leads to a more uniform light distribution within the light guide. See the attached image for the lighting effect. Figure 7a There are no dark lines when looking straight ahead, attached Figure 7b There is no obvious bright area in the outer 10-degree direction, attached Figure 7c There are no triangular dark areas at an outer 60-degree angle.

[0021] From the appendix Figure 6 It can be seen that in a conventional vertical stripe light guide, the light diffusion is less in the stripe area near the LED region, compared to the attached... Figure 8 The light guide of this utility model has a larger light diffusion, which can make the light distribution more uniform and effectively improve the light distribution, thus improving the uniformity of all angles. At the same time, it solves the problems of bright spots and dark areas at different angles.

[0022] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A light guide structure for improving light guide uniformity, characterized in that: It includes a light guide body (10) and an LED light source (20); the light guide body (10) includes light guide teeth (11) and light guide diffusion pattern surface (12), each pattern of the light guide diffusion pattern surface (12) has two directional adjustable diffusion surfaces.

2. The optical guide structure for improving optical guide uniformity according to claim 1, characterized in that: The light-guiding diffusion patterned surface (12) has a corn kernel structure.

3. A vehicle light, characterized in that: Includes the optical guide structure as described in claim 1 or 2.

Images