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:
Sep. 18, 1990
Filed:
Jun. 29, 1989
Hidetoshi Suzuki, Atsugi, JP;
Mitsuru Yamamoto, Atsugi, JP;
Toshiaki Majima, Tokyo, JP;
Ichiro Nomura, Yamato, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A display device has an electron ray generating unit of matrix electrode structure in which a plurality of cold cathodes generating electron rays are arranged two-dimensionally, image storing apparatus for storing therein image information as an amount of charges by a variation in a surface potential produced by the application of the electron rays from the electron ray generating unit, and a display for receiving the application of the electron rays applied from the electron ray generating unit and modulated by the electric charge stored in the image storing apparatus and visualizing the image information.