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:
Oct. 05, 1993
Filed:
Jul. 27, 1992
Tatsumi Fujiyoshi, Sendai, JP;
Munemitsu Abe, Miyagi, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A circuit for driving a liquid crystal panel includes an A/D converter for converting image data to digital data, a shift register for generating horizontal scanning signals, a capacitor group formed of capacitors the number of which corresponds to the number of bits of digital data, a selector for selecting none or at least one capacitor from among the capacitor group on the basis of horizontal scanning signals and digital data, a power-supply section for supplying an electric charge to each capacitor, first switch sections for charging an electric charge to selected capacitors only in every horizontal synchronization period, and second switch sections for connecting all capacitors to their corresponding signal electrodes S in every horizontal synchronization period. Even if the liquid crystal panel is formed into a large screen, neither is its parts mounting surface increased considerably, nor do the costs increase. In addition, a display having a high resolution can be realized with a simple construction.