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:
Aug. 23, 2011
Filed:
Sep. 23, 2008
Takahiro Nakamura, Gunma, JP;
Takahiro Nakamura, Gunma, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A projection-type image display device generates projection light by modulating light beams of at least three primary colors in accordance with image information and synthesizing the modulated light beams. The display device includes a light source unit constituted by arranging a plurality of light source elements each having light source arrays being arranged on heat receiving plates respectively so as to conduct the light beams of the colors to irradiation surfaces of a synthesizing prism, a refrigerating unit including at least a refrigerant compressor, a condenser, a pressure reducing unit and a refrigerant pipe constituting an evaporator, and an air cooling device lower in cooling capacity than the refrigerating unit. Of the plural light source arrays, those relatively large in the amount of heat generated are connected to the refrigerating unit, while the others are connected to the air cooling unit.