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:
Feb. 04, 2014
Filed:
Apr. 01, 2011
Ryuhei Amano, Hirakata, JP;
Takashi Ikeda, Higashi Osaka, JP;
Kazuhisa Takahashi, Oshu, JP;
Yoshitsugu Kohno, Hanamaki, JP;
Osamu Nagase, Hanamaki, JP;
Ryuhei Amano, Hirakata, JP;
Takashi Ikeda, Higashi Osaka, JP;
Kazuhisa Takahashi, Oshu, JP;
Yoshitsugu Kohno, Hanamaki, JP;
Osamu Nagase, Hanamaki, JP;
Sanyo Electric Co., Ltd., Moriguchi-shi, JP;
Ricoh Optical Industries Co., Ltd., Hanamaki, JP;
Abstract
Disclosed are a projection display apparatus and a projection optics provided in the projection display apparatus. The projection optics has a refractive optics and a reflective optics. In the refractive optics, a lens (non-circular lens) provided on a reflective optics side has a non-circular shape forming part of an imaginary circular region whose center is an optical axis center of the refractive optics. In other words, the non-circular lens has a shape of a cut-out portion of an imaginary circular lens having an optical axis center coinciding with the optical axis center of the refractive optics.