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US 5,331,447 AGranted
TFT active matrix liquid crystal display devices with plural TFTs in parallel per pixel
AssigneeHitachi, Ltd.
InventorsSakae Someya, Ryuuzoh Nashimoto, Hirofumi Suzuki, Katsuhiko Yarita, Shinji Matsumoto, Akira Sasano, Hideaki Taniguchi, Ryouji Oritsuki
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Abstract
There are disclosed various types of TFT active matrix liquid crystal display devices in which a pixel is divided into three parts, a capacitor is added to each pixel, light shielding is applied to each TFT, and the matrix is driven by a DC cancelling technique.
Claims19
A display device comprising:
- a first substrate;
- a plurality of first signal lines extending in a first direction, and provided on said first substrate;
- a plurality of second signal lines extending in a second direction, and provided on said first substrate;
- and
- a plurality of picture cells provided on said first substrate, each of said picture cells comprising:
- switching means, for turning each of said picture cells ON and OFF, electrically connected to one of said plurality of first signal lines and one of said plurality of second signal lines and,
- wherein each of said picture cells is provided in an area surrounded by said one of said plurality of first signal lines and another one of said first signal lines adjacent to said one of said plurality of first signal lines, and by said one of said plurality of second signal lines and another one of said second signal lines adjacent to said one of said plurality of second signal lines,
- wherein said switching means comprises first and second thin film transistors, said first and second thin film transistors being provided along said one of said plurality of first signal lines, wherein said one of said plurality of second signal lines is branched in the first direction so as to form a gate portion of said first and second thin film transistors, and said one of said plurality of second signal lines and said branched portion of said one of said plurality of second signal lines forms a T-like configuration, and
- wherein said first and second thin film transistors are provided in parallel so as to provide channel directions of said first and second thin film transistors in said second direction.
6 more elements
A display device comprising:
- a first substrate;
- a plurality of signal lines extending in a first direction, and provided on said first substrate;
- a plurality of scanning signal lines extending in a second direction, and provided on said first substrate;
- and
- a plurality of picture cells provided on said first substrate, each of said picture cells comprising:
- switching means for transferring picture signals, electrically connected to one of said plurality of signal lines an one of said plurality of scanning signal lines;
- and
- a pixel electrode electrically connected to said switching means,
- wherein each of said picture cells is provided in an area surrounded by said one of said plurality of signal lines and another signal line adjacent to said one of said plurality of signal lines, and by said one of said plurality of scanning signal lines and another scanning signal line adjacent to said one of said plurality of scanning signal lines, and
- wherein said switching means comprises first and second thin film transistors, said first and second thin film transistors being provided along said one of said plurality of signal lines, and a gate electrode portion of said first and second thin film transistors being protrusively extended from said one of said plurality of scanning signal lines.
7 more elements
Dependencies are inferred from the claim text.