Light guide plate, lighting device and vehicle lamp

Abstract

The invention provides a light guide plate, a lighting device and a vehicle lamp. The light guide plate comprises a lower surface, an upper surface and at least one side face located between the lower surface and the upper surface. The lower surface is provided with a first optical structure, and the first optical structure is used for uniformly reflecting light entering the light guide plate from at least one side surface to the upper surface; the upper surface is provided with a second optical structure, and the second optical structure is used for enabling light rays from the first optical structure to be evenly scattered to the outside of the light guide plate. By the adoption of the technical scheme, light entering the light guide plate from the side face can be evenly emitted outwards from the upper surface of the light guide plate, and even face light emitting can be achieved only through a small number of LED light sources.

Description

technical field [0001] The invention relates to the technical field of lighting devices, in particular to a light guide plate, a lighting device and a vehicle lamp. Background technique [0002] At present, the shapes of car lights are becoming more and more complex, and the requirements for uniformity are getting higher and higher. [0003] In the prior art, in order to achieve uniform light output on one surface, usually a plurality of circular light guides are spliced ​​together as a surface light source, or many LEDs are evenly distributed on the PCB to form a surface light source. When the light guides are spliced ​​together, there will be dark areas at the splicing area, and the uniformity of the light output is poor; the cost of the solution of evenly distributing many LEDs on the PCB is relatively high, the heat generation is relatively serious, and the requirements for heat dissipation are high. Contents of the invention [0004] In order to overcome the above-me...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, in order to achieve uniform light output on one surface, usually a plurality of circular light guides are spliced ​​together as a surface light source, or many LEDs are evenly distributed on the PCB to form a surface light source. When the light guides are spliced ​​together, there will be dark areas in the splicing area, and the uniformity of the light output is poor; the cost of the solution of evenly distributing many LEDs on the PCB is relatively high, the heat generation is relatively serious, and the requirements for heat dissipation are high.

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