Liquid crystal display apparatus in which plural common electrodes are parallel to the pixel electrodes on the same substrate and a black matrix on the opposing substrate
First Claim
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1. An active matrix type liquid crystal display apparatus, comprising:
- a pair of opposed substrates; and
a liquid crystal layer interposed between said pair of substrates;
one of said substrates comprising;
(a) plural scanning electrodes,(b) plural image signal electrodes crossing said scanning electrodes in a matrix shape,(c) plural pixel electrodes formed on said scanning electrodes via active elements, and(d) plural common electrodes formed in parallel to said pixel electrodes, which are formed between said one substrate and said liquid crystal layer so as to generate an electric field between said pixel electrode and said common electrode in parallel to said one substrate;
wherein a shielding layer parallel to said image signal electrodes and said scanning electrodes is provided on the other substrate opposing said one substrate comprising said image signal electrodes, and a specific resistivity of at least a part of said shielding layer formed in parallel to said image signal electrodes is less than 108 Ω
·
cm.
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Abstract
In an active matrix type liquid crystal display apparatus, respective ones of the electrodes on a substrate are provided so that an electric field substantially parallel to the substrate can be supplied to a liquid crystal layer. Polarizers for changing the optical characteristics based on the alignment of the liquid crystal layer are provided, as well as a shielding layer formed in parallel to the image signal electrodes on the substrate. The specific resistivity of the shielding layer is less than 108 Ω·cm.
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Citations
15 Claims
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1. An active matrix type liquid crystal display apparatus, comprising:
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a pair of opposed substrates; and a liquid crystal layer interposed between said pair of substrates; one of said substrates comprising; (a) plural scanning electrodes, (b) plural image signal electrodes crossing said scanning electrodes in a matrix shape, (c) plural pixel electrodes formed on said scanning electrodes via active elements, and (d) plural common electrodes formed in parallel to said pixel electrodes, which are formed between said one substrate and said liquid crystal layer so as to generate an electric field between said pixel electrode and said common electrode in parallel to said one substrate; wherein a shielding layer parallel to said image signal electrodes and said scanning electrodes is provided on the other substrate opposing said one substrate comprising said image signal electrodes, and a specific resistivity of at least a part of said shielding layer formed in parallel to said image signal electrodes is less than 108 Ω
·
cm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An active matrix type liquid crystal display apparatus, comprising:
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a pair of opposed substrates; and a liquid crystal layer interposed between said pair of substrates; one of said substrates comprising; (a) plural scanning electrodes, (b) plural image signal electrodes crossing said scanning electrodes in a matrix shape, (c) plural pixel electrodes formed on said scanning electrodes via active elements, and (d) plural common electrodes formed in parallel to said pixel electrodes, which are formed between said one substrate and said liquid crystal layer so as to generate an electric field between said pixel electrode and said common electrode in parallel to said one substrate; wherein a shielding layer parallel to said image signal electrodes and said scanning electrodes is provided on the other substrate opposing said one substrate comprising said image signal electrodes, a specific resistivity of at least one part of said shielding layer formed in parallel to said image signal electrodes is no greater than 108 Ω
·
cm, and a specific resistivity of at least another part of said shielding layer formed in parallel to said scanning electrodes is greater than the specific resistivity of said at least one part. - View Dependent Claims (13, 14, 15)
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Specification
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Current AssigneePanasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
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Original AssigneeHitachi, Ltd.
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InventorsAratani, Sukekazu, Matsuyama, Shigeru, Asuma, Hiroaki, Kinugawa, Kiyoshige, Oh-e, Masahito
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Primary Examiner(s)Sikes, William L.
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Assistant Examiner(s)MALINOWSKI, WALTER J
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Application NumberUS08/731,162Time in Patent Office698 DaysField of Search349/42, 349/110, 349/111US Class Current349/42CPC Class CodesG02F 1/133512 Light shielding layers, e.g...G02F 1/134363 for applying an electric fi...G02F 1/1368 in which the switching elem...
