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:
Dec. 14, 2004
Filed:
Jun. 04, 2002
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A liquid crystal display device according to the present invention includes an active matrix array made up of switching elements provided at each intersection between a plurality of scanning lines and a plurality of signal lines, and a vertical drive circuit for driving the active matrix array, in which the vertical drive circuit includes: scanning circuits N in number (N being a positive integer), which receive a start pulse and output pulse signals, the respective scanning circuits sequentially shifting the pulse signal by one-half of a clock signal cycle each; AND gate circuits N×M in number (M being an integer no less than 2), each provided with a first control terminal and a second control terminal, every M adjacent AND gate circuits being connected together via the first control terminals thereof, which receive a signal from one of the N scanning circuits, and every Mth AND gate circuit being connected together via the second control terminals thereof, which receive one of M kinds of second control signal; and NAND gate circuits, each of which receives an output from one of the AND gate circuits and one of two kinds of third control signal outputted by a third control terminal.