Light-emitting device capable of adjusting light rays of light source at light entering end of light guide

Abstract

The invention relates to alight-emitting device capable of adjusting the light rays of a light source at the light entering end of a light guide. The light-emitting device comprises a light guide and a reflection bowl; the reflection bowl is arranged close to the light entering face of the light guide; the reflection bowl comprises a first focus and a second focus; an LED light source is arranged at the first focus; and light emitted by the LED light source enters the light guide through the second focus. According to the light-emitting device of the invention, the design of a reflection free-form surface can change the divergence angle of a light beam, so that the spatial position transformation of the light source can be realized, the longitudinal space can be saved, and a solution is provided for the insufficient space of the head of the light guide; and a light emitting structure is adopted, so that the stereo uniform effect of the light can be improved.

Description

technical field [0001] The invention relates to a light-emitting device for adjusting the light of a light source at a light-introducing light end, and belongs to the technical field of automobile lighting. Background technique [0002] With the rapid development of automotive lighting technology, the design of car lights is becoming smaller and narrower. While the light emitting surface is enlarged, the structure of the car lights is also reduced, and the shading width of the bezel is getting smaller and smaller. There are certain requirements for space. For a structure with a small space, it is difficult to place the light source directly on the head of the light guide, and the direction of the light source needs to be adjusted. [0003] At present, there are many forms of adding reflective surfaces to the light input end of thick-walled parts, but there are fewer forms of adding emission surfaces to the light input end of the thick-walled parts. The parallel light collima...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many forms of adding reflective surfaces to the light input end of thick-walled parts, but there are fewer forms of adding emission surfaces to the light input end of the thick-walled parts. The parallel light collimated by ordinary paraboloids is not conducive to emitting light to the light guide teeth for light output. , only a small part is used by the light guide teeth, and most of them are transmitted to the end of the light end, which will intensify the bright spots at the end; and the cross section of the light guide is generally only φ4-8mm, and the reflective surface is relatively large, which will waste a large part of the light

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