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:
Feb. 07, 1984
Filed:
Jan. 12, 1981
Applicant:
Inventors:
Seigo Togashi, Tokorozawa, JP;
Akira Tsuzuki, Tokorozawa, JP;
Assignee:
Citizen Watch Company Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09G / ;
U.S. Cl.
CPC ...
340718 ; 340784 ; 340799 ; 340811 ;
Abstract
A display device of solid-state matrix type, such as a liquid crystal display device, retains display data for an unlimited period after such data has been written into the display, with no need for periodic re-writing of the display data to compensate for deterioration due to leakage effects. In addition, the display data can be read out again, if required, so that the display device can also be used as a memory. such a display device can also be utilized to perform data input, by writing in of data through application of light to the display surface, such as by using a light pen.