Optics: image projectors – Color filter
Reexamination Certificate
2011-06-07
2011-06-07
Epps, Georgia Y (Department: 2878)
Optics: image projectors
Color filter
C348S743000
Reexamination Certificate
active
07954960
ABSTRACT:
A video image display apparatus for displaying a video image in accordance with a video image signal including: a light source for emitting an illumination light to a color wheel driven by a color wheel driving unit to rotate the color wheel for filtering and transmitting lights of different colors therefrom; a spatial light modulator (SLM) for receiving the lights of different colors projected from the color wheel; a master clock signal generation unit for generating a master clock signal constituting a reference for transferring data to the SLM; a frame start signal generation unit for generating, from the master clock signal, a frame start signal indicating the start of a frame; a wheel position detection unit for detecting an angular position of the wheel; a phase comparison unit for comparing a phase of the frame start signal with a wheel index signal generated from the wheel position detection unit indicating a position of the color wheel; and a motor control unit for receiving a phase comparison signal from the phase comparison unit for controlling a rotation speed of a motor for driving the color wheel to rotate at a controlled rotation speed.
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Endo Taro
Ishii Fusao
Shirai Akira
Sugimoto Naoya
Epps Georgia Y
Lin Bo-In
Olympus Corporation
Silicon Quest Kabushiki-Kaisha
Williams Don
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