| 摘要 |
Disclosed is a color wheel apparatus for a DLP type display device having a color wheel unit, which has a color filter and a rotation part for supporting the color filter and rotating integrally with the color filter; a color wheel supporter for rotatably supporting the color wheel unit; a sensor having a light emitter provided in the color wheel supporter and emitting light to the rotation part, and a light receiver to receive the light reflected from the rotation part; and an index part patterned on a predetermined region of a circumference of the rotation part to irregularly reflect the light emitted from the light emitter.
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