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. 04, 1989
Filed:
Mar. 19, 1987
Yasukazu Morito, Mobara, JP;
Yasuhiko Uehara, Chiba, JP;
Hidetsugu Matsukiya, Koganei, JP;
Hajime Yamamoto, Tokyo, JP;
Shuji Inaho, Flanders, NJ (US);
Takashi Hase, Ebina, JP;
Shinji Yokota, Isehara, JP;
Hitachi, Ltd., Tokyo, JP;
Kasei Optonix Ltd., Tokyo, JP;
Abstract
In a projection type color picture display system having red, green and blue picture producing cathode-ray tubes in which the green picture producing cathode-ray tube is capable of emitting green light defined as x.ltorsim.0.330 and y.gtorsim.0.570 in the CIE chromaticity diagram, use is made of a ZnS: Ag, Al phosphor material for forming the phosphor screen of the blue picture producing cathode-ray tube. The projection type display system thus obtained is capable of displaying color pictures with a high color purity and a high saturation.