Color wheel

Abstract

The invention relates to a color wheel, which comprises a multicolor optical filter group, a motor, a supporting piece, a sensor and a processor, wherein the supporting piece comprises a first surface, a second surface which is opposite to the first surface, and a sidewall which is positioned between the first surface and the second surface; the multicolor optical filter group is fixed on the second surface of the fixed piece; the motor is used for driving the fixed piece to rotate, so as to drive the multicolor optical filter group to rotate; the sensor is provided with a shell and a sensor wafer which is used for sensing the position of the multicolor optical filter group and transmitting the position state of the current multicolor optical filter group to the processor; and the processor controls color composition processing according to the position state of the multicolor optical filter group. The color wheel also comprises a light-retaining component which is arranged on the sensor shell and used for preventing stray light from being emitted to the sensor wafer. The color wheel can prevent the stray light from interfering the sensor, and can improve the problem of timing synchronization between the processor and optical filters, thereby optimizing the representation effect of colors.

Description

technical field [0001] The invention relates to a color wheel, in particular to a color wheel capable of optimizing color expression effects. Background technique [0002] At present, projectors are mainly divided into LCD type and DLP type (Digital Light Processing), among which DLP projector adopts DMD (Digital Micromirror Device) microlens reflection technology, and uses color wheel (Color Wheel) to complete the separation of colors and processing. [0003] In the DMD projection system, the white light emitted by the light source is focused on the color wheel through the focusing lens. The color wheel is mainly composed of red, green, blue and other color filters. Color separation is performed and beams of a specific color are projected onto the DMD surface. The surface of the DMD is composed of small mirrors corresponding to the number of pixels. These small mirrors rotate according to the control of the video signal. When the small mirrors rotate until their reflected...

AI Technical Summary

Problems solved by technology

[0006] However, the projector is a high-brightness product, which will generate many stray light beams 18 inside the casing. The sensor chip 34 of the prior art sensor 30 for emitting the light beam 17 and sensing the reflected light beam 17 is directly exposed to the outside world.

The stray light beam 18 will directly impinge on the sensor chip 34 of the sensor 30, which will affect the sensitivity of the sensor chip 34, and the problem of timing asynchrony between the processor 25 and the filter group 10 will easily occur, further affecting the processor 25. Subsequent color synthesis processing is carried out, resulting in unclear picture quality and unclear colors

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