Flat light guide for wide-light-emitting-surface signal lamp of vehicle lamp and application of flat light guide

Abstract

The invention provides a flat light guide for a vehicle lamp wide light-emitting surface signal lamp and application, the width of the flat light guide is larger than the thickness, the width and the thickness of the flat light guide are gradually changed, and the width is gradually narrowed and the thickness is gradually thinned from the end part of the light guide to the tail part of the light guide. According to the flat light guide, a single light guide body is adopted and has a wide light-emitting face, signal lamp modeling of the wide light-emitting face can be met, uniform light emitting of a modeling area is achieved, the lightening defect does not exist, and the dark space problem caused by the overlapping area of multiple light guide bodies is avoided; a width and thickness gradually changing structure is adopted from the end part to the tail part of the light guide to form a special light emitting mechanism, so that the brightness of the tail part of the light guide is ensured, and the problem that the tail part cannot realize uniform brightness due to low light efficiency in a long light guide design is solved.

Description

technical field [0001] The invention relates to the technical field of automobile lamps, in particular to a flat light guide used for a signal lamp with a wide light-emitting surface of an automobile lamp and its application. Background technique [0002] Today's headlight design not only requires uniform light emission, but also the increasingly novel shape of the light-emitting surface is more and more favored by consumers, which has spawned some light-emitting solutions that use an irregular wide light-emitting surface for some car lights and signal lights, and take into account the uniformity. requirements, it is necessary to use a light guide without dark areas. Therefore, the uniform light-emitting light guide with a single wide light-emitting surface can show greater advantages in design. [0003] At present, the width of the light-emitting area of ​​the single light guide design scheme is mostly less than 12mm. In the prior art, a light guide with a wider light-emi...

AI Technical Summary

Problems solved by technology

However, if multiple light guides are arranged side by side, there will be dark areas between the light guides in the overlapping area between the light guides, which will affect the uniformity effect; in addition, the longer light guide design needs to reduce the light guide teeth due to the higher light efficiency at the front end. In order to maintain the light output intensity, the processing difficulty of the front light guide teeth is increased. At the same time, there will be dark areas at the tail end due to the reduction of light efficiency, which cannot meet the requirement of uniform brightness of the entire light guide.

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