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. 09, 1991
Filed:
Feb. 16, 1990
Applicant:
Inventors:
Kazuo Tsukagoshi, Nagaokakyo, JP;
Hiroshi Kawamura, Nagaokakyo, JP;
Hiroshi Tetsuda, Nagaokakyo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358 60 ; 358252 ; 358 64 ; 358237 ; 358253 ; 350417 ;
Abstract
In a projection television apparatus, a color selecting device is located on an optical light path passing through a cathode ray tube and a series of projection lenses disposed in front of the cathode ray tube. This color selecting device has a high reflection factor or a high absorption factor to light having a wavelength of at most 520 nm. With this color selecting device, the range of color reproduction can be much more improved, thus causing an increased degree of color purity of green at the central and peripheral areas of the cathode ray tube.