US5616936A
Expired / Lapsed
US
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Active matrix assembly with signal line crossing to equalize stray capacitance
Assignee: Seiko Epson Corp
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Filing: 1995-03-10
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Granted: 1997-04-01
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Expires: 2015-03-10
Abstract
Abstract An active matrix panel including a matrix of driving electrodes couples through thin film transistor switches to a corresponding source line and gate line and at least one of a driver circuit including complementary thin film transistors for driving the source and/or gate lines of the picture elements on the substrate. The thin film transistors of the active matrix have the same cross-sectional structure as the P-type or the N-type thin film transistors forming the driver circuit and are formed during the same patterning process.
Inventors
- 👤 Toshiyuki Misawa
- 👤 Hiroyuki Oshima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:57
CPC Classifications
H; H10; H10D; H10D84/00; H10D84/80; H10D84/82; H10D84/83; H10D84/85; H10D84/859; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1345; G02F1/13454; G09; G09G; G09G3/00; G09G3/001; G09G3/002; G09G3/003; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3648; G09G3/3674; G09G3/3677; G09G3/3685; G09G3/3688; H10D84/01; H10D84/0123; H10D84/0126; H10D84/0165; H10D84/0191; H10D86/00; H10D86/40; H10D86/441; H10D86/60; H10W; H10W20/00; H10W20/40; G02F1/133345; G02F1/136; G02F1/1362; G02F1/136213; G02F1/136254; G09G2300/00; G09G2300/04; G09G2300/0404; G09G2300/0408; G09G2300/08; G09G2300/0809; G09G2330/00; G09G2330/12; G09G3/006; G09G3/2007; G09G3/2011; G09G3/3659; H10D30/00; H10D30/60; H10D30/67; H10D30/6704; H10D30/6713; H10W72/00; H10W72/01; H10W72/015; H10W72/01515; H10W72/071; H10W72/075; Y; Y10; Y10S; Y10S257/00; Y10S257/923; Y10S345/00; Y10S345/904
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
151 words
An active matrix assembly for an electro-optical device comprising: a picture element matrix, the picture element matrix including a plurality of source lines and a plurality of picture elements electrically coupled to the plurality of source lines; and a source line driving circuit electrically coupled to the picture element matrix through the plurality of source lines, the source line driving circuit comprising a shift register, at least a first clock signal line and a second clock signal line and a signal bus electrically coupled to the picture element matrix and the source line driving circuit, wherein the first clock signal line crosses the second clock signal line at substantially center points of the first and second clock signal lines so as to substantially equalize an average distance between the first clock signal line and the signal bus and an average distance between the second clock signal line and the signal bus.
Claim 2
Dependent Claim
151 words
An active matrix assembly for an electro-optical device comprising: a picture element matrix, the picture element matrix including a plurality of source lines and a plurality of picture elements electrically coupled to the plurality of source lines; and a source line driving circuit electrically coupled to the picture element matrix through the plurality of source lines, the source line driving circuit comprising a shift register, at least a first clock signal line and a second clock signal line and a signal bus electrically coupled to the picture element matrix and the source line driving circuit, wherein the first clock signal line crosses the second clock signal line at substantially center points of the first and second clock signal lines so as to substantially equalize an average distance between the first clock signal line and the signal bus and an average distance between the second clock signal line and the signal bus.
Claim 3
Dependent Claim
24 words
The active matrix assembly of claim 1, wherein each of the plurality of picture elements includes a thin film transistor as a switching element.
Claim 4
Dependent Claim
36 words
The active matrix assembly of claim 1, wherein a capacitance between the first clock signal line and the signal bus is substantially equal to a capacitance between the second clock signal line and the signal bus.
Claim 5
Dependent Claim
138 words
An active matrix assembly for an electro-optical device comprising: a picture element matrix, the picture element matrix including a plurality of source lines and a plurality of picture elements coupled to the plurality of source lines; and a source line driving circuit coupled to the picture element matrix through the plurality of source lines, the source line driving circuit comprising a shift register, at least a first clock signal line and a second clock signal line and a signal bus coupled to the picture element matrix and the source line driving circuit, wherein the first clock signal line crosses the second clock signal line at more than one point substantially equalizing an average distance between the first clock signal line and the signal bus and an average distance between the second clock signal line and the signal bus.
Claim 6
Dependent Claim
138 words
An active matrix assembly for an electro-optical device comprising: a picture element matrix, the picture element matrix including a plurality of source lines and a plurality of picture elements coupled to the plurality of source lines; and a source line driving circuit coupled to the picture element matrix through the plurality of source lines, the source line driving circuit comprising a shift register, at least a first clock signal line and a second clock signal line and a signal bus coupled to the picture element matrix and the source line driving circuit, wherein the first clock signal line crosses the second clock signal line at more than one point substantially equalizing an average distance between the first clock signal line and the signal bus and an average distance between the second clock signal line and the signal bus.
Claim 7
Dependent Claim
36 words
The active matrix assembly of claim 4, wherein a capacitance between the first clock signal line and the signal bus is substantially equal to a capacitance between the second clock signal line and the signal bus.
Claim 8
Dependent Claim
69 words
The active matrix assembly of claim 1, wherein a rising edge of a first clock signal transmitted on the first clock signal line occurs at substantially a same time as a falling edge of a second clock signal transmitted on the second clock signal line and a falling edge of the first clock signal occurs at substantially a same time as a rising edge of the second clock signal.
Claim 9
Dependent Claim
22 words
The active matrix assembly of claim 1, wherein the shift register of the source line driving circuit includes CMOS thin film transistors.
Claim 10
Dependent Claim
170 words
An active matrix assembly for an electro-optical device comprising: a picture element matrix, the picture element matrix including a plurality of source lines and a plurality of picture elements coupled to the plurality of source lines; and a source line driving circuit coupled to the picture element matrix through the plurality of source lines, the source line driving circuit comprising a shift register, at least a first clock signal line and a second clock signal line for driving the shift register, and a signal bus coupled to the picture element matrix and the source line driving circuit, wherein the first clock signal line crosses the second clock signal line so as to substantially equalize an average distance between the first clock signal line and the signal bus, and an average distance between the second clock signal line and the signal bus, and to substantially equalize a capacitance between the first clock signal line and the signal bus and a capacitance between the second clock signal line and the signal bus.
Claim 11
Dependent Claim
170 words
An active matrix assembly for an electro-optical device comprising: a picture element matrix, the picture element matrix including a plurality of source lines and a plurality of picture elements coupled to the plurality of source lines; and a source line driving circuit coupled to the picture element matrix through the plurality of source lines, the source line driving circuit comprising a shift register, at least a first clock signal line and a second clock signal line for driving the shift register, and a signal bus coupled to the picture element matrix and the source line driving circuit, wherein the first clock signal line crosses the second clock signal line so as to substantially equalize an average distance between the first clock signal line and the signal bus, and an average distance between the second clock signal line and the signal bus, and to substantially equalize a capacitance between the first clock signal line and the signal bus and a capacitance between the second clock signal line and the signal bus.
Claim 12
Dependent Claim
24 words
The active matrix assembly of claim 4, wherein each of the plurality of picture elements includes a thin film transistor as a switching element.
Claim 13
Dependent Claim
69 words
The active matrix assembly of claim 4, wherein a rising edge of a first clock signal transmitted on the first clock signal line occurs at substantially a same time as a falling edge of a second clock signal transmitted on the second clock signal line and a falling edge of the first clock signal occurs at substantially a same time as a rising edge of the second clock signal.
Claim 14
Dependent Claim
22 words
The active matrix assembly of claim 4, wherein the shift register of the source line driving circuit includes CMOS thin film transistors.
Claim 15
Dependent Claim
136 words
An active matrix assembly for an electro-optical device comprising: A picture element matrix, the picture element matrix including a plurality of source lines and a plurality of picture elements electrically coupled to the plurality of source lines; and a source line driving circuit electrically coupled to the picture element matrix through the plurality of source lines, the source line driving circuit comprising a shift register, at least a first clock signal line and a second clock signal line and a signal bus electrically coupled to the picture element matrix and the source line driving circuit, wherein the first clock signal line crosses the second clock signal line and a capacitance between the first clock signal line and the signal bus is substantially equal to a capacitance between the second clock signal line and the signal bus.
Claim 16
Dependent Claim
136 words
An active matrix assembly for an electro-optical device comprising: A picture element matrix, the picture element matrix including a plurality of source lines and a plurality of picture elements electrically coupled to the plurality of source lines; and a source line driving circuit electrically coupled to the picture element matrix through the plurality of source lines, the source line driving circuit comprising a shift register, at least a first clock signal line and a second clock signal line and a signal bus electrically coupled to the picture element matrix and the source line driving circuit, wherein the first clock signal line crosses the second clock signal line and a capacitance between the first clock signal line and the signal bus is substantially equal to a capacitance between the second clock signal line and the signal bus.
Claim 17
Dependent Claim
197 words
A projection type color display device including a light source, at least one light valve, and at least one projecting optical system for projecting a color image, the at least one light valve including a plurality of liquid crystal cells, wherein data signals are supplied to the plurality of liquid crystal cells through a plurality of field effect transistors arranged in a plurality of picture elements, the light valve comprising: a picture element matrix, the picture element matrix including a plurality of source lines and a plurality of picture elements electrically coupled to the plurality of source lines; and a source line driving circuit electrically coupled to the picture element matrix through the plurality of source lines, the source line driving circuit comprising a shift register, at least a first clock signal line and a second clock signal line and a signal bus electrically coupled to the picture element matrix and the source line driving circuit, wherein the first clock signal line crosses the second clock signal line and a capacitance between the first clock signal line and the signal bus is substantially equal to a capacitance between the second clock signal line and the signal bus.
Claim 18
Dependent Claim
197 words
A projection type color display device including a light source, at least one light valve, and at least one projecting optical system for projecting a color image, the at least one light valve including a plurality of liquid crystal cells, wherein data signals are supplied to the plurality of liquid crystal cells through a plurality of field effect transistors arranged in a plurality of picture elements, the light valve comprising: a picture element matrix, the picture element matrix including a plurality of source lines and a plurality of picture elements electrically coupled to the plurality of source lines; and a source line driving circuit electrically coupled to the picture element matrix through the plurality of source lines, the source line driving circuit comprising a shift register, at least a first clock signal line and a second clock signal line and a signal bus electrically coupled to the picture element matrix and the source line driving circuit, wherein the first clock signal line crosses the second clock signal line and a capacitance between the first clock signal line and the signal bus is substantially equal to a capacitance between the second clock signal line and the signal bus.
Claim 19
Dependent Claim
26 words
The projection type color display device of claim 13, wherein each of the plurality of picture elements includes a thin film transistor as a switching element.
Claim 20
Dependent Claim
71 words
The projection type color display device of claim 13, wherein a rising edge of a first clock signal transmitted on the first clock signal line occurs at substantially a same time as a falling edge of a second clock signal transmitted on the second clock signal line and a falling edge of the first clock signal occurs at substantially a same time as a rising edge of the second clock signal.
Claim 21
Dependent Claim
24 words
The projection type color display device of claim 13, wherein the shift register of the source line driving circuit includes CMOS thin film transistors.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-03-31 | 2000-09-30 | 2001-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-31 | 2004-09-30 | 2005-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-03-31 | 2008-09-30 | 2009-04-01 | $7700.00 | Window Closed / Lapsed |