Projector and color wheel module thereof

Abstract

The invention discloses a color wheel module and a projector provided with the color wheel module. The color wheel module is arranged on an optical machine and comprises a rotating device, a fixing seat, a color wheel and an optical sensor, wherein the color wheel is fixed on a rotating piece of the rotating device; both the rotating device and the optical sensor are fixed on the fixing seat; the fixing seat comprises a dustproof structure; the dustproof structure has an arc-shaped curved surface opposite to the rotating surface of the rotating piece and extending along the rotating direction of the rotating piece; the arc-shaped curved surface and the optical sensor are sequentially arranged along the rotating direction; and through enabling the distance between the arc-shaped curved surface and the rotating surface to be narrowed in the rotating direction or arranging a guide groove beside the arc-shaped curved surface basically extending along the rotating direction and lower than the arc-shaped curved surface, the color wheel module can effectively restrain the dust deposition amount on the optical sensor.

Description

[0001] This divisional application is based on the divisional application of the Chinese patent application with the application number 201410486624.9, the application date is September 22, 2014, and the invention title is "projector and its color wheel module". technical field [0002] The present invention relates to a projector, in particular to a projector using a color wheel and a color wheel module thereof. Background technique [0003] In traditional projectors that use color wheel light splitting, the color wheel of the color wheel module is driven by a motor, and the rotational position of the color wheel is determined by an optical sensor sensing a mark attached to the motor shaft. The motor usually uses The fixed frame made of metal sheet metal parts is used for fixing, and the optical sensor is also fixed on the fixed frame. However, since the optical sensor is independent from the motor, it is difficult for the optical sensor to avoid dust deposition on the opti...

AI Technical Summary

Problems solved by technology

However, in actual operation, based on the consideration of the mechanical action of the motor shaft (such as the rotation stability of the motor shaft, the decrease in rotation stability caused by the wear of the shaft, etc.), the stopper structure cannot be placed close to the motor shaft without limit; In other words, there must be a certain flow of airflow between the stopper structure and the motor shaft

In addition, this structure has no other mechanism for further suppressing dust deposition for the airflow that has entered between the block structure and the motor shaft, so the structure has its limit on the effect of suppressing dust deposition

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