Color wheel motor, color wheel module and projection device

Abstract

The invention discloses a color wheel motor, a color wheel module thereof and a projection device. The motor comprises a shell, a rotor rotation shaft and a position detection module. The shell comprises a sealed containing space and a through hole communicated to the containing space. The rotor rotation shaft comprises a first part arranged in the containing space and a second part protruded to the shell from the through hole. The second part can be provided with the color wheel fixedly. The position detection module comprises a detection material arranged on the first part and a detection element which is arranged on the shell and is capable of detecting the detection material, and the position detection module is used for detecting the rotation position of the rotor rotation shaft. Therefore, the color wheel motor, the color wheel module thereof and the projection device provided by the invention have the advantages that the detection environment with less dust can be provided to the detection module by means of the dust-proof design of shell of the motor, and the influences of dust and particles and the like to the detection can be inhibited effectively.

Description

technical field [0001] The present invention relates to a color wheel motor, a color wheel module and a projection device, in particular to a color wheel motor with a rotating shaft position detection function, a color wheel module and a projection device. Background technique [0002] With the development of projection technology and the reduction in the price of related components, projectors have been widely used in various occasions. At present, it is mainly projected in the way of synthesizing color images through multiple color light projections. For projectors on the market that use an incandescent light source and a rotating color wheel to provide multiple colors of light, in order to accurately project the correct color image, the synchronization of the color wheel and the digital micromirror device (Digital Micromirror Device, DMD) Effective control is necessary, so the detection of the relative position of the color wheel is indispensable. Since the rotation of ...

AI Technical Summary

Problems solved by technology

However, the motor is a high-speed electronic device, and it is often accompanied by high heat generation. If the heat is not dissipated in time, the stability of the motor itself will be affected, and the above-mentioned extra casing will increase the difficulty of heat dissipation of the motor.

If another open shielding structure is installed next to the optical sensor to prevent dust deposition, because this structure is still open, there is still dust deposition on the optical sensor. After a period of operation, the optical sensor is still very The detection reliability may be reduced or even invalid due to serious deposition

[0005] It is obvious that the above-mentioned method of suppressing dust deposition by using a shell or other shielding structures may introduce heat dissipation problems or fail to effectively prevent dust deposition. Therefore, it is necessary to propose a solution that avoids increasing the burden of heat dissipation and can effectively prevent dust deposition.

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