dlp projector and its color wheel device

Abstract

The invention discloses a DLP projector and its color wheel device. The color wheel device comprises: a color wheel, including a color wheel rotating disc and a rotating shaft vertically and fixedly connected to the middle part of the color wheel rotating disc. The color wheel rotating disc includes a plurality of filters of different colors. The light sheet and the rotating shaft rotate together with the color wheel, and a plurality of filters are arranged around the rotating shaft; the small color wheel plate is arranged corresponding to the rotating shaft; the speed sensor is arranged on the small color wheel plate, and the speed sensor is set opposite to the periphery of the rotating shaft. Used to sense the rotation speed of the rotating shaft; the first color wheel brush fixed on the periphery of the rotating shaft, the first color wheel brush rotates with the rotating shaft, when the first color wheel brush rotates to the position opposite to the rotation speed sensor, the first color wheel brush The wheel brush cleans the sensing surface of the speed sensor. The above-mentioned color wheel device can solve the problem that the rotational speed sensor is attached to dust and cause the projector to shut down, and it will not affect the normal heat dissipation of the color wheel itself.

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] The color wheel (ColorWheel) is an important part of the DLP (DataLeakagePrevention) projector, which is responsible for the separation and processing of colors. 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 Micromirror 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 crea...

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

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