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:
Nov. 27, 2012
Filed:
Aug. 08, 2011
Method and device for converting an emission beam from a laser light source into 2-dimensional light
Kenichi Kasazumi, Osaka, JP;
Yasuo Kitaoka, Osaka, JP;
Kiminori Mizuuchi, Osaka, JP;
Kazuhisa Yamamoto, Osaka, JP;
Kenichi Kasazumi, Osaka, JP;
Yasuo Kitaoka, Osaka, JP;
Kiminori Mizuuchi, Osaka, JP;
Kazuhisa Yamamoto, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A 2-dimensional beam scan unit reflects emission beams from a red laser light source, a green laser light source and a blue laser light source and scans in a 2-dimensional direction. Diffusion plates diffuse the respective light beams scanned in the 2-dimensional direction to introduce them to corresponding spatial light modulation elements. The respective spatial light modulation elements modulate the respective lights in accordance with video signals of the respective colors. A dichroic prism multiplexes the lights of the three colors after the modulation and introduces the multiplexed lights to a projection lens so that a color image is displayed on a screen. Since the 2-dimensional light emitted from the beam scan unit is diffused to illuminate the spatial light modulation element, it is possible to change the optical axis of the beam emerging from the light diffusion member for irradiating the spatial light modulation element moment by moment, thereby effectively suppressing speckle noise.