Liquid crystal display apparatus including scanning circuit having bidirectional shift register stages

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United States of America Patent

PATENT NO 6232939
SERIAL NO

09188110

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A liquid crystal display apparatus has horizontal and vertical scanning circuits for scanning an array of pixels. An image signal applied to an image signal supply circuit in the form of series of pixel signals is transferred to pixels in the array of pixels designated by the horizontal and vertical scanning circuits. Each of the horizontal and vertical scanning circuits have a series connection of bidirectional shift register stages and are capable of bidirectional scanning. Each of the bidirectional shift register stages includes a pair of latches connected in tandem and is capable of providing an intermediate output and a shift register stage output. The pair of latches of each of the bidirectional shift register stages except those located at both ends of the series connection have respective intermediate and bidirectional shift register stage outputs contributing to designation of pixels to which pixel signals are to be supplied, while the pair of latches of the shift register stages located at each end of the series connection have their bidirectional shift register stage outputs contributing to such designation of pixels and their intermediate output terminals not contributing to such designation of pixels.

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First Claim

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Patent Owner(s)

  • PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Matsumoto, Katsumi Mobara, JP 67 779
Saito, Katsutoshi Mobara, JP 9 227
Sato, Hideo Hitachi, JP 351 3934
Takemoto, Iwao Mobara, JP 83 1434

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