Liquid crystal display device
First Claim
1. A liquid crystal display device provided with a driving circuit deposited on a substrate having formed thereon a plurality of display pixel sections, said driving circuit being provided for driving the display pixel sections, wherein:
- said driving circuit includes a buffer composed of a P-channel thin film transistor and an N-channel thin film transistor that are connected in series,at least one of said P-channel thin film transistor and said N-channel thin film transistor is composed of a plurality of thin film transistors that are connected in parallel between a power source line and an output line, andat least one of said power source line and said output line is formed in a wiring pattern composed of a main wiring section and branched wiring sections branched into respective thin film transistors, so that when any of said plurality of thin film transistors connected in parallel becomes defective, a thin film transistor which has become defective is alone disconnectable from one of said power source line and said output line.
1 Assignment
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Accused Products
Abstract
A driving circuit integrated type active-matrix liquid crystal display device is arranged such that a buffer composed of a P-channel thin film transistor and an N-channel thin film transistor that are connected in series is adopted for the P-channel thin film transistor and an N-channel thin film transistor; at least one of the P-channel thin film transistor and the N-channel thin film transistor is composed of a plurality of thin film transistors that are connected in parallel; and at least one of a power source line and an output line connected to the plurality of thin film transistors connected in parallel is formed in a wiring pattern composed of a main wiring section and a branched wiring section branched into respective thin film transistors. The described arrangement permits a line-shaped defect due to a defective thin film transistor which constitutes a buffer of the drive circuit to be eliminated with ease, while improving a yield of panels.
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Citations
19 Claims
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1. A liquid crystal display device provided with a driving circuit deposited on a substrate having formed thereon a plurality of display pixel sections, said driving circuit being provided for driving the display pixel sections, wherein:
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said driving circuit includes a buffer composed of a P-channel thin film transistor and an N-channel thin film transistor that are connected in series, at least one of said P-channel thin film transistor and said N-channel thin film transistor is composed of a plurality of thin film transistors that are connected in parallel between a power source line and an output line, and at least one of said power source line and said output line is formed in a wiring pattern composed of a main wiring section and branched wiring sections branched into respective thin film transistors, so that when any of said plurality of thin film transistors connected in parallel becomes defective, a thin film transistor which has become defective is alone disconnectable from one of said power source line and said output line. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A liquid crystal display device provided with a driving circuit deposited on a substrate having formed thereon a plurality of display pixel sections, said driving circuit being provided for driving the display pixel sections, wherein:
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said driving circuit includes a buffer composed of a P-channel thin film transistor and an N-channel thin film transistor that are connected in series, at least one of said P-channel thin film transistor and said N-channel thin film transistor is composed of a plurality of thin film transistors that are connected in parallel between a power source line and an output line, said plurality of thin film transistors connected in parallel respectively include a plurality of gates said plurality of gates being interconnected through a gate line, and said gate line is formed in a wiring pattern composed of divided wiring sections that are divided for respective gates and a connecting wiring section for connecting respective divided wiring sections provided between respective thin film transistors, so that when a gate of any of said plurality of thin film transistors connected in parallel becomes defective, a gate which has become defective is alone disconnectable from said gate line. - View Dependent Claims (9, 10, 11)
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12. A liquid crystal display device provided with a driving circuit deposited on a substrate having formed thereon a plurality of display pixel sections, said driving circuit being provided for driving the display pixel sections, wherein:
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said driving circuit includes a buffer composed of a P-channel thin film transistor and an N-channel thin film transistor that are connected in series, at least one of said P-channel thin film transistor and said N-channel thin film transistor is composed of a plurality of thin film transistors that are connected in parallel between a power source line and an output line, said plurality of thin film transistors connected in parallel respectively include a plurality of gates, said plurality of gates being interconnected through a gate line, and said gate line for connecting said plurality of gates is formed in a wiring pattern composed of divided wiring sections that are divided for respective gates and a connecting wiring section for connecting respective terminal ends of the divided wiring sections, so that when a gate of any of said plurality of thin film transistors connected in parallel becomes defective, a gate which has become defective is alone disconnectable from said gate line. - View Dependent Claims (13, 14, 15)
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16. A liquid crystal display device provided with a driving circuit deposited on a substrate having formed thereon a plurality of display pixel sections, said driving circuit being provided for driving the display pixel sections, wherein:
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said driving circuit includes a buffer composed of a P-channel thin film transistor and an N-channel thin film transistor that are connected in series, at least one of said P-channel thin film transistor and said N-channel thin film transistor is composed of a plurality of thin film transistors that are connected in parallel between a power source line and an output line, said plurality of thin film transistors connected in parallel are formed by a plurality of semiconductor pieces that are formed in one integral part, and at least one of said power source line, said output line and a gate line is formed in a wiring pattern composed of a main wiring section and a branched wiring section branched into respective thin film transistors from the main wiring section, so that when any of said plurality of thin film transistors connected in parallel becomes defective, a thin film transistor which has become defective is alone disconnectable from one of said power source line, said output line and said gate line. - View Dependent Claims (17, 18, 19)
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Specification