A reflective car tail light using a dlp projector as a light source

Abstract

The invention belongs to the field of vehicle signal devices, and provides a reflecting type automobile tail lamp adopting a digital light processing (DLP) projection system as a light source. The DLP projection system is fixedly connected with a projection lens into a whole; light rays projected by the DLP projection system form the light source of the automobile tail lamp; the light rays projected by the DLP projection system are reflected by a reflector and then penetrate through an outer lens to form emitted light of the reflecting type automobile tail lamp; by adjusting a digital micromirror device (DMD) lens of the DLP projection system, the output light pattern of the automobile tail lamp is dynamic and variable; and by adjusting a color wheel of the DLP projection system, the color of the light rays projected by the DLP projection system is changed, the color of the light rays projected by the automobile tail lamp is controlled, and therefore switching of different functions of the tail lamp is achieved. The DLP projection system is applied to the field of automobile tail lamps, the changeless light pattern effect of the automobile tail lamp is changed, free switching of different colors and different light patterns can be achieved, and the intelligent tail lamp is truly realized. The reflecting type automobile tail lamp can be widely applied to the field of design and manufacturing of automobile tail lamps.

Description

technical field [0001] The invention belongs to the field of vehicle lighting or signal devices, in particular to a signal device for taillights of automobiles. Background technique [0002] DLP (Digital Light Processing, Digital Light Processing) is a revolutionary new method of projecting and displaying information, designed and developed by TI Corporation of the United States. Through a highly reflective DMD (Digital Micromirror Device, digital micromirror) lens (also known as a chip, the same below), it can project a picture composed of three primary colors (RGB). [0003] Compared with traditional projectors using LCD as light source, this technology shows great advantages in terms of lumens, image resolution and high contrast. A DLP-based projection system includes memory and signal processing to support an all-digital approach. [0004] Other elements of a DLP projector (also known as a projector or projection system) typically include a light source, a color filter...

AI Technical Summary

Problems solved by technology

[0008] However, once the structure of the reflective surface / light concentrator is determined in the taillight of the car using this working mode, the light pattern of the taillight is also determined, and the light pattern of the light emission cannot be changed.

[0009] In addition, since the color of the light emitted by the existing light source (bulb / LED) is fixed, the taillight of the car using the above working mode cannot change the color of the light projected by the taillight of the car. Therefore, if the existing taillight of the car needs to When emitting light signals of different colors, it is necessary to set at least two light sources with different light colors to meet the needs of different light colors

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