Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yoshiharu Hirakata0
Jun Koyama0
Satoshi Teramoto0
Shunpei Yamazaki0
Date of Patent
March 6, 2007
0Patent Application Number
106336760
Date Filed
August 5, 2003
0Patent Primary Examiner
Patent abstract
An image display system comprises a first liquid crystal projector which projects a counterclockwise-rotating, circularly polarized light beam to form an image containing specific visual information on a screen and a second liquid crystal projector which projects a clockwise-rotating, circularly polarized light beam to form a white image on the same screen. When viewed with the naked eye, a combination of the two images projected on the screen appears totally white. A viewer wearing a dedicated viewing device equipped with an optical filter which allows counterclockwise-rotating, circularly polarized light to pass through can selectively see the image projected by the first liquid crystal projector.
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