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:
Jul. 24, 2012
Filed:
Jun. 04, 2008
Hiroshi Kitano, Hyogo, JP;
Yoshimasa Fushimi, Osaka, JP;
Hiroshi Kitano, Hyogo, JP;
Yoshimasa Fushimi, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
Red, green, and blue laser light emitted from laser light sources-is transformed into substantially parallel beams by collimator lenses-, collected by microlens arrays-, and rendered uniform by rod integrators-, whereupon it is used to illuminate spatial light modulation elements-and subjected to modulation. The modulated laser light exiting from the spatial light modulation elements-is recombined using a beam-combining prismand subjected to pixel separation using a birefringent plate, which is rotationally driven by a birefringent plate rotary drive unit, after which it is projected upon a screenusing a projection optical system. The birefringent platespatially separates the modulated laser light using birefringence. When pixels are spatially separated by the birefringent plate, the pixel grid region is made smaller, the distribution of brightness on the screen is rendered uniform, and speckle noise is reduced.