DLP (Data Leakage Prevention) projector and color wheel device thereof

Abstract

The invention discloses a DLP (Data Leakage Prevention) projector and color wheel device thereof. The color wheel device comprises a color wheel, a color wheel small plate which is arranged corresponding to a rotating shaft, a rotating speed sensor which is arranged on the color wheel small plate, and a first color wheel brush which is fixedly arranged on the periphery of the rotating shaft, wherein the color wheel comprises a color wheel turntable and the rotating shaft which is perpendicularly and fixedly connected with the middle part of the color wheel turntable, the color wheel turntable comprises a plurality of light filters in different colors, the rotating shaft rotates with the color wheel turntable and the light filters are arranged around the rotating shaft; the rotating speed sensor is arranged opposite to the periphery of the rotating shaft and is used for sensing the rotating speed of the rotating shaft; the first color wheel brush rotates with the rotating shaft, and when the first color wheel rotates to a position opposite to the rotating speed sensor, the first color brush cleans the sensing surface of the rotating speed sensor. The color wheel device can solve the problem that the projector is caused to be powered off as dust is attached onto the rotating speed sensor, and the normal heat dissipation of the color wheel is not influenced.

Description

【Technical field】 [0001] The invention relates to a projector, in particular to a DLP projector and a color wheel device thereof. 【Background technique】 [0002] Color wheel (Color Wheel) is an important part of DLP (Data Leakage Prevention) projector, it is responsible for color separation and processing. Generally speaking, the life of the color wheel is very long, 20000H, which is far longer than the life of the projector. However, dust is a fatal defect of DLP projectors. If dust is blocked on the color wheel sensor, the color wheel sensor cannot sense the color wheel operation, and the projector will shut down. [0003] The principle of DLP projector color generation is that the micromirror of the DMD (Digital Micro mirror Device, digital micromirror device) chip is responsible for reflecting red, green, and blue light on the projection surface. Due to the shaking of the micromirror of the DMD chip and the fast rotation speed of the color wheel, it creates an illusion...

AI Technical Summary

Problems solved by technology

[0006] In order to prevent dust from clogging the color wheel sensor, some DLP projectors add dust-proof nets to the air inlets, but the dust-proof nets will affect the heat dissipation of the entire projector, and the dust-proof nets are easily blocked over time, and eventually Over time, the color wheel sensor will still have dust attached

Or, some DLP projectors completely cover the color wheel, but because the color wheel needs light to pass through, it cannot be sealed on the light path, so that the color wheel cannot be completely covered, and dust enters through the light hole, which will still block the color wheel sensor, and the cover will affect the heat dissipation of the color wheel itself

Images