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:
May. 10, 2016
Filed:
Nov. 07, 2011
Kazumasa Ueoka, Ibaraki, JP;
Shinro Inui, Ibaraki, JP;
Kei Adachi, Ibaraki, JP;
Chohei Ono, Ibaraki, JP;
Takafumi Ishizu, Ibaraki, JP;
Kazuo Shikita, Ibaraki, JP;
Kazumasa Ueoka, Ibaraki, JP;
Shinro Inui, Ibaraki, JP;
Kei Adachi, Ibaraki, JP;
Chohei Ono, Ibaraki, JP;
Takafumi Ishizu, Ibaraki, JP;
Kazuo Shikita, Ibaraki, JP;
HITACHI MAXELL, LTD., Osaka, JP;
Abstract
A projection image display apparatus capable of maintaining the positional accuracy of an integrator optical system even when subjected to an external force is provided. The projection image display apparatus includes an integrator optical system which converges and uniformizes a light emitted from a light source, a color separating optical system which separates the colors of the light emitted from the integrator optical system, a color synthesizing optical system which synthesizes lights separated by the color separating optical system, a projection optical system which emits the light, which has been synthesized by the color synthesizing optical system, onto a projection surface, a first optical case which fixes and houses the integrator optical system, the color separating optical system, and the color synthesizing optical system at respective predetermined positions, and a second optical case which fixes and houses optical components of the integrator optical system at predetermined positions, and the second optical case is attached to the first optical case.