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:
Mar. 20, 2012
Filed:
Jul. 23, 2007
Osamu Umamine, Fussa, JP;
Masanori Ohta, Akishima, JP;
Osamu Umamine, Fussa, JP;
Masanori Ohta, Akishima, JP;
Casio Computer Co., Ltd., Tokyo, JP;
Abstract
An optical system unit of a projector of the invention includes an illumination side block, an image producing block and a projection side block, the image producing block, in which a DMD display device is fixed which reflects rays of 'off' state light to the outside of an entrance opening of a projection side optical system, has a resin accommodation case and a metallic light absorbing portion which is disposed on an inner surface of the accommodation case, an inner surface of the light absorbing portion has heat resisting properties and light absorbing properties, and the accommodation case has in an upper surface thereof a cooling opening for preventing the overheating of the resin which forms the accommodation case.