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.

Date of Patent:
Mar. 16, 1999

Filed:

Oct. 27, 1995
Applicant:
Inventors:

Hideki Asada, Tokyo, JP;

Kazunori Ozawa, Tokyo, JP;

Hiroyuki Fukumori, Tokyo, JP;

Assignee:

NEC Corporation, Tokyo, JP;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G / ;
U.S. Cl.
CPC ...
345100 ;
Abstract

A vertical drive circuit comprises a shift circuit composed of a plurality of cascaded half-bit scan circuits, a plurality of NAND gate circuits controlled by output signals of the scan circuits and control signals, and a plurality of output buffer circuits connected to the NAND gate circuits. A horizontal drive circuit comprises a shift circuit composed of a plurality of cascaded half-bit scan circuits, a plurality of first NAND gate circuits controlled by output signals of the scan circuits and control signals, a plurality of second NAND gate circuits controlled by output signals of the first NAND gate circuits and enable signals, and a plurality of data sampling and holding circuits controlled by output signals of the second NAND gate circuits.


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