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EP0321073A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Liquid crystal display device

Assignee: Sharp Corp
•
Filing: 1988-09-30
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Granted: —
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Expires: 2008-09-30
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Abstract

Abstract A liquid crystal display device comprising an insulating substrate, a plurality of transparent electrodes disposed on the insulating substrate in a matrix fashion to form a plurality of pixels, at least two thin film transistors (2, 3) disposed in the vicinity of each of the transparent electrodes (1) on the insulating substrate, each the thin film transistor having a drain electrode (4, 5), a source electrode (6, 7) and a gate electrode (8, 9), in which the drain electrode is connected to the transparent electrode, a gate electrode line (G1, Gm) for each line or column of the transparent electrodes disposed on the insulating substrate in the vicinity thereof, each the gate electrode of the thin film transistors connected to each of the transparent electrodes of the line or column being connected in common thereto, and source electrode lines (S1, Snt1) for each column or line of the transparent electrodes disposed on the insulating substrate in the vicinity thereof and at a right angle to the gate electrode line, the number of the source electrode lines being equal to the number of the thin film transistors connected to one transparent electrode, in each the source electrode of the thin film transistors connected to each the transparent electrode of the column or line being connected respectively thereto in a manner capable of connection to an exterior circuit.

Inventors

  • 👤 Toshifumi Mitsumune
  • 👤 Hiroshi Take
  • 👤 Kiyoshi Nakazawa

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-01 22:36
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G02F1/1362; G02F1/13624

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 211 words
A liquid crystal display device comprising an insulating substrate, a plurality of transparent electrodes disposed on the insulating substrate in a matrix fashion to form a plurality of pixels, at least two thin film transistors disposed in the vicinity of each of the transparent electrodes on the insulating substrate, each thin film transistor having a drain electrode, a source electrode and a gate electrode, in which the drain electrode is connected to the trans­parent electrode, a gate electrode line for each line or column of the transparent electrodes disposed on the insulating sub­strate in the vicinity thereof, each gate electrode of the thin film transistors connected to each of the trans­parent electrodes of the line or column being connected in common thereto, and source electrode lines for each column or line of the transparent electrodes disposed on the insulating substrate in the vicinity thereof and at a right angle to the gate electrode line, the number of the source electrode lines being equal to the number of the thin film transistors connected to one transparent electrode, in each the source electrode of the thin film transistors connected to each the transparent electrode of the column or line being connected respectively thereto in a manner capable of connection to an exterior circuit.
Claim 2
Dependent Claim 211 words
A liquid crystal display device comprising an insulating substrate, a plurality of transparent electrodes disposed on the insulating substrate in a matrix fashion to form a plurality of pixels, at least two thin film transistors disposed in the vicinity of each of the transparent electrodes on the insulating substrate, each thin film transistor having a drain electrode, a source electrode and a gate electrode, in which the drain electrode is connected to the trans­parent electrode, a gate electrode line for each line or column of the transparent electrodes disposed on the insulating sub­strate in the vicinity thereof, each gate electrode of the thin film transistors connected to each of the trans­parent electrodes of the line or column being connected in common thereto, and source electrode lines for each column or line of the transparent electrodes disposed on the insulating substrate in the vicinity thereof and at a right angle to the gate electrode line, the number of the source electrode lines being equal to the number of the thin film transistors connected to one transparent electrode, in each the source electrode of the thin film transistors connected to each the transparent electrode of the column or line being connected respectively thereto in a manner capable of connection to an exterior circuit.
Claim 3
Dependent Claim 20 words
A liquid crystal display device in accordance with claim 1, wherein the transparent electrode is an indium thin oxide film.
Claim 4
Dependent Claim 50 words
A liquid crystal display device in accordance with claim 1, wherein the gate electrode lines are provided in the vicinity of the transparent electrodes in parallel to the row direction, and the source electrodes lines are provided in the vicinity of the transparent electrodes in parallel to the column direction.
Claim 5
Dependent Claim 20 words
A liquid crystal display device in accordance with claim 3, wherein the transparent electrode is an indium tin oxide film.
Claim 6
Dependent Claim 72 words
A liquid crystal display device comprising a plurality of display elements each including a transparent display electrode for controlling the display state of that element, each said electrode being connected to a plurality of source lines by a corresponding plurality of thin film transistors arranged in parallel so as to interconnect when in their conductive states, said source lines, such source lines being arranged to be independently connectable to external test circuitry.
Claim 7
Dependent Claim 72 words
A liquid crystal display device comprising a plurality of display elements each including a transparent display electrode for controlling the display state of that element, each said electrode being connected to a plurality of source lines by a corresponding plurality of thin film transistors arranged in parallel so as to interconnect when in their conductive states, said source lines, such source lines being arranged to be independently connectable to external test circuitry.
Claim 8
Dependent Claim 34 words
A liquid crystal display device according to claim 5 wherein the gate electrodes of said plurality of thin film transistors associated with any given display element are connected to a common gate electrode line.
Claim 9
Dependent Claim 90 words
A liquid crystal display device according to claim 5 or claim 6 wherein said display elements are disposed in a matrix fashion of columns and rows and wherein in each column, the display electrodes are connected by their respective pluralities of thin film transistors to a common said plurality of source lines extending along that column, and wherein in each row the pluralities of gate electrodes of the pluralities of thin film transistors associated with the respective display elements are connected to a common gate electrode extending along that row.

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