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. 02, 1991
Filed:
Feb. 09, 1989
Kazuo Uesaka, Amagasaki, JP;
Kozo Shimamoto, Amagasaki, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
The invention relates to a large-size image display panel for outdoor use. The image display panel related to the invention has a number of cathode ray tubes which are respectively provided with a plurality of red luminous bodies, green luminous bodies, and blue luminous bodies illuminating themselves by receiving irradiation of electron beams in the inside of the face plate, while each of those cathode ray tubes is also provided with a red filter, a green filter, and a blue filter which are disposed in the outside of the face plate in correspondence with red luminous bodies, green luminous bodies, and blue luminous bodies. Using these filters provided in correspondence with those luminous bodies, electron beams having specific wavelengths from respective luminous bodies are selectively filtered out. As a result, the image display panel related to the invention sufficiently secures the needed luminance intensity of image and reliably generates a satisfactory image exhibiting sharp contrast and high brilliance constantly.