US5764321A
Expired / Lapsed
US
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Active matrix type liquid crystal display device having non-overlapping peripheral circuits
Assignee: Semiconductor Energy Laboratory Co Ltd
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Filing: 1997-05-21
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Granted: 1998-06-09
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Expires: 2017-05-21
Abstract
Abstract In an active matrix type liquid crystal display device which a liquid crystal is arranged between a pair of substrates, two TFTs are connected with each of the corresponding electrodes (for one pixel) formed on the substrates. The liquid crystal is driven and switched by the two TFTS. Since a voltage applied to the liquid crystal is divided by the two TFTS, a higher voltage than a withstanding voltage of a TFT is applied to the liquid crystal, so that voltages applied to the TFTs, that is, voltages applied between a source and a drain of each TFT are decreased. The voltages each has an opposite phase.
Inventors
- 👤 Jun Koyama
- 👤 Yuji Kawasaki
- 👤 Satoshi Teramoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:19
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G02F1/1362; G02F1/13624; G02F1/1368; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3614; G09G3/3648; G09G3/3659; H; H10; H10D; H10D30/00; H10D30/60; H10D30/67; G02F1/136213; G09G2300/00; G09G2300/08; G09G2300/0809
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
147 words
An active matrix type liquid crystal display device comprising: a first substrate having a first pixel electrode thereon; a second substrate having a second pixel electrode thereon, said first and second pixel electrodes facing each other; a first transistor on said first substrate for supplying a first voltage to said first pixel electrode; a second transistor on said second substrate for supplying a second voltage to said second pixel electrode; a first peripheral circuit on said first substrate having a third transistor for driving said first transistor; a second peripheral circuit on said second substrate having a fourth transistor for driving said second transistor; and a liquid crystal material interposed between said first and second pixel electrodes, wherein said liquid crystal material is switched by a voltage generated by said first and second voltages, wherein said first and second peripheral circuits are not overlapped with each other.
Claim 2
Dependent Claim
147 words
An active matrix type liquid crystal display device comprising: a first substrate having a first pixel electrode thereon; a second substrate having a second pixel electrode thereon, said first and second pixel electrodes facing each other; a first transistor on said first substrate for supplying a first voltage to said first pixel electrode; a second transistor on said second substrate for supplying a second voltage to said second pixel electrode; a first peripheral circuit on said first substrate having a third transistor for driving said first transistor; a second peripheral circuit on said second substrate having a fourth transistor for driving said second transistor; and a liquid crystal material interposed between said first and second pixel electrodes, wherein said liquid crystal material is switched by a voltage generated by said first and second voltages, wherein said first and second peripheral circuits are not overlapped with each other.
Claim 3
Dependent Claim
19 words
A device according to claim 1, wherein said first and second pixel electrodes do not completely overlap each other.
Claim 4
Dependent Claim
19 words
A device according to claim 1, wherein said first and second voltages have an opposite polarity to each other.
Claim 5
Dependent Claim
19 words
A device according to claim 1 wherein said first to fourth transistors include a P-channel type thin film transistor.
Claim 6
Dependent Claim
19 words
A device according to claim 1 wherein said first to fourth transistors include an N-channel type thin film transistor.
Claim 7
Dependent Claim
21 words
A device according to claim 1, wherein said first and second thin film transistors are operated in synchronism with each other.
Claim 8
Dependent Claim
15 words
A device according to claim 1, wherein said first peripheral circuit comprises a decoder circuit.
Claim 9
Dependent Claim
24 words
A device according to claim 1, wherein an absolute value of said first voltage is approximately the same as that of said second voltage.
Claim 10
Dependent Claim
158 words
An active matrix type liquid crystal display device comprising: a first substrate having a first pixel electrode thereon; a second substrate having a second pixel electrode thereon, said first and second pixel electrodes facing each other; a first transistor on said first substrate for supplying a first voltage to said first pixel electrode; a second transistor on said second substrate for supplying a second voltage to said second pixel electrode; a first peripheral circuit on said first substrate having a third transistor for driving said first transistor; a second peripheral circuit said second substrate having a fourth transistor for driving said second transistor; and a liquid crystal material interposed between said first and second pixel electrodes; wherein said first and second transistors are overlapped with each other, wherein said liquid crystal material is switched by a voltage generated by said first and second voltages, and wherein said first and second peripheral circuits are not overlapped with each other.
Claim 11
Dependent Claim
158 words
An active matrix type liquid crystal display device comprising: a first substrate having a first pixel electrode thereon; a second substrate having a second pixel electrode thereon, said first and second pixel electrodes facing each other; a first transistor on said first substrate for supplying a first voltage to said first pixel electrode; a second transistor on said second substrate for supplying a second voltage to said second pixel electrode; a first peripheral circuit on said first substrate having a third transistor for driving said first transistor; a second peripheral circuit said second substrate having a fourth transistor for driving said second transistor; and a liquid crystal material interposed between said first and second pixel electrodes; wherein said first and second transistors are overlapped with each other, wherein said liquid crystal material is switched by a voltage generated by said first and second voltages, and wherein said first and second peripheral circuits are not overlapped with each other.
Claim 12
Dependent Claim
21 words
A device according to claim 9, wherein said first and second thin film transistors are operated in synchronism with each other.
Claim 13
Dependent Claim
19 words
A device according to claim 9, wherein said first and second voltages have an opposite polarity to each other.
Claim 14
Dependent Claim
15 words
A device according to claim 9, wherein said first peripheral circuit comprises a decoder circuit.
Claim 15
Dependent Claim
24 words
A device according to claim 9, wherein an absolute value of said first voltage is approximately the same as that of said second voltage.
Claim 16
Dependent Claim
147 words
An active matrix type liquid crystal display device comprising: a first substrate having a first pixel electrode thereon; a second substrate having a second pixel electrode thereon, said first and second pixel electrodes facing each other; a first transistor on said first substrate for supplying a first voltage to said first pixel electrode; a second transistor on said second substrate for supplying a second voltage to said second pixel electrode; a first peripheral circuit on said first substrate having a third transistor for driving said first transistor; a second peripheral circuit on said second substrate having a forth transistor for driving said second transistor; and a liquid crystal material interposed between said first and second pixel electrodes, wherein said first and second transistors are not overlapped with each other, and wherein said liquid crystal material is switched by a voltage generated by said first and second voltage.
Claim 17
Dependent Claim
147 words
An active matrix type liquid crystal display device comprising: a first substrate having a first pixel electrode thereon; a second substrate having a second pixel electrode thereon, said first and second pixel electrodes facing each other; a first transistor on said first substrate for supplying a first voltage to said first pixel electrode; a second transistor on said second substrate for supplying a second voltage to said second pixel electrode; a first peripheral circuit on said first substrate having a third transistor for driving said first transistor; a second peripheral circuit on said second substrate having a forth transistor for driving said second transistor; and a liquid crystal material interposed between said first and second pixel electrodes, wherein said first and second transistors are not overlapped with each other, and wherein said liquid crystal material is switched by a voltage generated by said first and second voltage.
Claim 18
Dependent Claim
21 words
A device according to claim 14, wherein said first and second thin film transistors are operated in synchronism with each other.
Claim 19
Dependent Claim
19 words
A device according to claim 14, wherein said first and second voltages have an opposite polarity to each other.
Claim 20
Dependent Claim
15 words
A device according to claim 14, wherein said first peripheral circuit comprises a decoder circuit.
Claim 21
Dependent Claim
19 words
A device according to claim 14, wherein said first and second peripheral circuits are not overlapped with each other.
Claim 22
Dependent Claim
24 words
A device according to claim 14, wherein an absolute value of said first voltage is approximately the same as that of said second voltage.
Claim 23
Dependent Claim
164 words
An active matrix type liquid crystal display device comprising: a first substrate having a first pixel electrode thereon; a second substrate having a second pixel electrode thereon, said first and second pixel electrodes facing each other; a first transistor on said first substrate for supplying a first voltage to said first pixel electrode; a second transistor on said second substrate for supplying a second voltage to said second pixel electrode; a first peripheral circuit on first substrate having a third transistor for driving said first transistor; a second peripheral circuit on said second substrate having a fourth transistor for driving said second transistor; a first auxiliary capacitor associated with said first transistor; a second auxiliary capacitor associated with said second transistor; and a liquid crystal material interposed between said first and second electrodes, wherein said liquid crystal material is switched by a voltage generated by said first and second voltages, and wherein said first and second peripheral circuits are not overlapped with each other.
Claim 24
Dependent Claim
164 words
An active matrix type liquid crystal display device comprising: a first substrate having a first pixel electrode thereon; a second substrate having a second pixel electrode thereon, said first and second pixel electrodes facing each other; a first transistor on said first substrate for supplying a first voltage to said first pixel electrode; a second transistor on said second substrate for supplying a second voltage to said second pixel electrode; a first peripheral circuit on first substrate having a third transistor for driving said first transistor; a second peripheral circuit on said second substrate having a fourth transistor for driving said second transistor; a first auxiliary capacitor associated with said first transistor; a second auxiliary capacitor associated with said second transistor; and a liquid crystal material interposed between said first and second electrodes, wherein said liquid crystal material is switched by a voltage generated by said first and second voltages, and wherein said first and second peripheral circuits are not overlapped with each other.
Claim 25
Dependent Claim
20 words
The device of claim 20, wherein said first and second thin film transistors are operated in synchronism with each other.
Claim 26
Dependent Claim
19 words
A device according to claim 20, wherein said first and second voltages have an opposite polarity to each other.
Claim 27
Dependent Claim
15 words
A device according to claim 20, wherein said first peripheral circuit comprises a decoder circuit.
Claim 28
Dependent Claim
24 words
A device according to claim 20, wherein an absolute value of said first voltage is approximately the same as that of said second voltage.
Claim 29
Dependent Claim
165 words
An active matrix type liquid crystal display device comprising: a first substrate having a first pixel electrode thereon; a second substrate having a second pixel electrode thereon, said first and second pixel electrodes facing each other; a first transistor on said first substrate for supplying a first voltage to said first pixel electrode; a second transistor on said substrate for supplying a second voltage to said second pixel electrode; a first peripheral circuit on said first substrate having a third transistor for driving said first transistor; a second peripheral circuit on said second substrate having a fourth transistor for driving said second transistor; and a liquid crystal material interposed between said first and second electrodes, wherein each of said first to fourth transistors has at least a channel region comprising a crystalline semiconductor film, wherein said liquid crystal material is switched by a voltage generated by said first and second voltages, and wherein said first and second peripheral circuits are not overlapped with each other.
Claim 30
Dependent Claim
165 words
An active matrix type liquid crystal display device comprising: a first substrate having a first pixel electrode thereon; a second substrate having a second pixel electrode thereon, said first and second pixel electrodes facing each other; a first transistor on said first substrate for supplying a first voltage to said first pixel electrode; a second transistor on said substrate for supplying a second voltage to said second pixel electrode; a first peripheral circuit on said first substrate having a third transistor for driving said first transistor; a second peripheral circuit on said second substrate having a fourth transistor for driving said second transistor; and a liquid crystal material interposed between said first and second electrodes, wherein each of said first to fourth transistors has at least a channel region comprising a crystalline semiconductor film, wherein said liquid crystal material is switched by a voltage generated by said first and second voltages, and wherein said first and second peripheral circuits are not overlapped with each other.
Claim 31
Dependent Claim
21 words
A device according to claim 25, wherein said first and second thin film transistors are operated in synchronism with each other.
Claim 32
Dependent Claim
19 words
A device according to claim 25, wherein said first and second voltages have an opposite polarity to each other.
Claim 33
Dependent Claim
15 words
A device according to claim 25, wherein said first peripheral circuit comprises a decoder circuit.
Claim 34
Dependent Claim
24 words
A device according to claim 25, wherein an absolute value of said first voltage is approximately the same as that of said second voltage.
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