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:
Jun. 06, 2006
Filed:
Mar. 14, 2003
Shigeo Kubota, Kanagawa, JP;
Junichi Ohsako, Tokyo, JP;
Masayasu Kakinuma, Kanagawa, JP;
Kazuhito Shimoda, Kanagawa, JP;
Shigeo Kubota, Kanagawa, JP;
Junichi Ohsako, Tokyo, JP;
Masayasu Kakinuma, Kanagawa, JP;
Kazuhito Shimoda, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A clear image unaffected by the brightness of the projection environment. The projection screen according to the present invention is a projection screen for projecting thereupon narrow-band tricolor wavelength band light to display an image, and comprises an optical thin film () which has high reflection properties regarding the narrow-band tricolor wavelength band light, and has high transmission properties regarding at least visible wavelength band light other than the wavelength band light, on a screen base (). With the projection screen according to the present invention configured as above, the optical thin film () serves as a so-called band filter. That is to say, the optical thin film () particularly reflects narrow-band tricolor wavelength band light and transmits light of other wavelengths, thereby functioning as a narrow-band tricolor wavelength bandwidth filter acting to separate these.