Projector and color wheel module thereof

Abstract

The invention discloses a projector and a color wheel module of the projector. The color wheel module is arranged on an optical machine and comprises a rotating device, a fixing base, a color wheel and an optical sensor. The color wheel is fixed to a rotating piece of the rotating device. The rotating device and the optical sensor are both fixed to the fixing base. The fixing base comprises a dustproof structure, and the dustproof structure is provided with an arc-shaped curved surface and extends in the rotating direction of the rotating device relative to the rotating surface of the rotating piece. The arc-shaped curved surface and the optical sensor are arranged in sequence in the rotating direction. According to the color wheel module, the amount of dust accumulated on the optical sensor can be effectively reduced by reducing the distance between the arc-shaped curved surface and the rotating surface in the rotating direction or arranging a guide groove which is approximately extends in the rotating direction and lower than the arc-shaped curved surface besides the arc-shaped curved surface.

Description

technical field [0001] The present invention relates to a projector, in particular to a projector using a color wheel and a color wheel module thereof. Background technique [0002] 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 optical sensor. When the dust covering the optical sensor reaches a certain amount or thickness, the optical sensor may fail. At present, some color wheel modules have used a stopper structure, which is placed close to the motor shaft and adjacent to the optical senso...

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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