The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 07, 2011
Filed:
Dec. 03, 2008
Akira Shirai, Hino, JP;
Taro Endo, Chofu, JP;
Naoya Sugimoto, Hino, JP;
Fusao Ishii, Menlo Park, CA (US);
Akira Shirai, Hino, JP;
Taro Endo, Chofu, JP;
Naoya Sugimoto, Hino, JP;
Fusao Ishii, Menlo Park, CA (US);
Silicon Quest Kabushiki-Kaisha, , JP;
Olympus Corporation, , JP;
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.