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:
Jul. 15, 2014
Filed:
Sep. 14, 2012
Osamu Arakawa, Shiojiri, JP;
Hiroyuki Shindo, Matsumoto, JP;
Toshiaki Hashizume, Okaya, JP;
Tatsuo Uchida, Sendai, JP;
Yoshito Suzuki, Sayama, JP;
Baku Katagiri, Warabi, JP;
Osamu Arakawa, Shiojiri, JP;
Hiroyuki Shindo, Matsumoto, JP;
Toshiaki Hashizume, Okaya, JP;
Tatsuo Uchida, Sendai, JP;
Yoshito Suzuki, Sayama, JP;
Baku Katagiri, Warabi, JP;
Seiko Epson Corporation, Tokyo, JP;
Tohoku University, Sendai-shi, JP;
Abstract
A screen in which observation distance may be adjusted while maintaining image brightness and a projection system using the screen. In a light control layer of a screen, a first angle region that determines a diffusion distribution of a reflected light is different according to the screen position in a control direction in which light diffusion control is performed. Accordingly, a diffusion distribution of image light emitted from a screen surface is adjusted to be tilted downward by an upper end and upward by a lower end according to the screen position. Thus, for example, a size of a diffused angle range is maintained to be 30°, and a direction in which the image light is diffusion-emitted corresponds to an assumed position of an observer. The projection image can be observed while maintaining brightness of an image and the observation distance L can be adjusted to be short.