US5404235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal device
Assignee: Canon Inc
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Filing: 1993-12-23
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Granted: 1995-04-04
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Expires: 2013-12-23
Abstract
Abstract A liquid crystal device of a matrix type, having a pair of electrode substrates disposed in spaced opposition to each other, with a liquid crystal, such as a ferroelectric liquid crystal, in the space between the substrates, which provides improved display quality. A group of scanning signal lines and a group of information signal lines are arranged on the mutually opposing surfaces of the substrates, and extend perpendicular to each other. In one form of the present invention, the scanning signal lines have a smaller resistance than the information signal lines. In another form, the scanning signal lines have a smaller resistance to the input thereto than the information signal lines. Thus, the peak value of ripple on the scanning signal lines, hence, the influence of the ripple on the non-select pixels, is reduced, thereby eliminating flickering on the screen caused by the ripple.
Inventors
- 👤 Shinjiroh Okada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:09
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1343; G02F1/134309; G02F1/134336; G02F1/13439; G09; G09G; G09G2320/00; G09G2320/02; G09G2320/0209
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
168 words
A liquid crystal device, comprising: a plurality of scanning lines to which a scanning signal is applied, said plurality of scanning lines being disposed on a first substrate; a plurality of information lines to which an information signal is applied, said plurality of information lines being disposed on a second substrate; a liquid crystal in a space between said first and second substrates; and a plurality of pixels, each of said pixels having a pixel electrode structure for providing an electric field to cause said each pixel to exhibit an optical state, said electrode structure consisting essentially of one of said scanning lines and one of said information lines, wherein said electric field for causing said each pixel to exhibit said optical state is provided only by combination of said scanning signal and said information signal and wherein a resistor is electrically connected to said scanning line in said electrode structure in which the resistance of said Scanning line is less than the resistance of said information line.
Claim 2
Dependent Claim
168 words
A liquid crystal device, comprising: a plurality of scanning lines to which a scanning signal is applied, said plurality of scanning lines being disposed on a first substrate; a plurality of information lines to which an information signal is applied, said plurality of information lines being disposed on a second substrate; a liquid crystal in a space between said first and second substrates; and a plurality of pixels, each of said pixels having a pixel electrode structure for providing an electric field to cause said each pixel to exhibit an optical state, said electrode structure consisting essentially of one of said scanning lines and one of said information lines, wherein said electric field for causing said each pixel to exhibit said optical state is provided only by combination of said scanning signal and said information signal and wherein a resistor is electrically connected to said scanning line in said electrode structure in which the resistance of said Scanning line is less than the resistance of said information line.
Claim 3
Dependent Claim
157 words
A liquid crystal device, comprising: a plurality of scanning lines to which a scanning signal is applied, said plurality of scanning lines being disposed on a first substrate; a plurality of information lines to which an information signal is applied, said plurality of information lines being disposed on a second substrate; a liquid crystal in a space between said first and second substrates; and a plurality of pixels, each of said pixels having a pixel electrode structure for providing an electric field to cause said each pixel to exhibit an optical state, said electrode structure consisting essentially of one of said scanning lines and one of said information lines, wherein said electric field for causing said each pixel to exhibit said optical state is provided only by combination of said scanning signal and said information signal and wherein the resistance of said scanning line in said electrode structure is less than the resistance of said information line.
Claim 4
Dependent Claim
157 words
A liquid crystal device, comprising: a plurality of scanning lines to which a scanning signal is applied, said plurality of scanning lines being disposed on a first substrate; a plurality of information lines to which an information signal is applied, said plurality of information lines being disposed on a second substrate; a liquid crystal in a space between said first and second substrates; and a plurality of pixels, each of said pixels having a pixel electrode structure for providing an electric field to cause said each pixel to exhibit an optical state, said electrode structure consisting essentially of one of said scanning lines and one of said information lines, wherein said electric field for causing said each pixel to exhibit said optical state is provided only by combination of said scanning signal and said information signal and wherein the resistance of said scanning line in said electrode structure is less than the resistance of said information line.
Claim 5
Dependent Claim
23 words
A device according to claim 2, wherein each of said scanning lines comprises two conductive layers, at least one of which is transparent.
Claim 6
Dependent Claim
14 words
A device according to claim 2, wherein said liquid crystal is ferroelectric liquid crystal.
Claim 7
Independent Claim
173 words
An apparatus comprising liquid crystal device comprising: a plurality of scanning lines to which a scanning signal is applied, said plurality of scanning lines being disposed on a first substrate; a plurality of information lines to which on information signal is applied said plurality of information lines being disposed on a second substrate; a liquid crystal in a space between said first and second substrates; and a plurality of pixels, each of said pixels having a pixel electrode structure for providing an electric field to cause said each pixel to exhibit an optical state, said electrode structure consisting essentially of one of said scanning lines and one of said information lines; and a controller for controlling application of said scanning signal and said information signal, wherein said electric field for causing said each pixel to exhibit said optical state is provided only by combination of said scanning signal and said information signal and wherein the resistance of said scanning line in said electrode structure is less than the resistance of said information line.
Claim 8
Independent Claim
173 words
An apparatus comprising liquid crystal device comprising: a plurality of scanning lines to which a scanning signal is applied, said plurality of scanning lines being disposed on a first substrate; a plurality of information lines to which on information signal is applied said plurality of information lines being disposed on a second substrate; a liquid crystal in a space between said first and second substrates; and a plurality of pixels, each of said pixels having a pixel electrode structure for providing an electric field to cause said each pixel to exhibit an optical state, said electrode structure consisting essentially of one of said scanning lines and one of said information lines; and a controller for controlling application of said scanning signal and said information signal, wherein said electric field for causing said each pixel to exhibit said optical state is provided only by combination of said scanning signal and said information signal and wherein the resistance of said scanning line in said electrode structure is less than the resistance of said information line.
References Cited (Backward Citations)
US4082430A
Cited
US4035060A
Cited
US4641923A
Cited
US4973135A
Cited
US4734688A
Cited
JPS6194023A
Cited
US4923285A
Cited
US4898456A
Cited
US4902107A
Cited
US4738515A
Cited
US4802744A
Cited
US4773738A
Cited
JPS63198022A
Cited
US5016989A
Cited
US5128786A
Cited
US5136407A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-04-03 | 1998-10-03 | 1999-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-03 | 2002-10-03 | 2003-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-03 | 2006-10-03 | 2007-04-04 | $7700.00 | Window Closed / Lapsed |