US5128663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display device incorporating separately operable pixels and method for operating same
Assignee: Central Research Laboratories Ltd
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Filing: 1989-04-13
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Granted: 1992-07-07
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Expires: 2009-04-13
Abstract
Abstract A method of addressing a display device comprising a matrix of separately operable pixels is provided. The method comprises the step of applying across a given pixel a voltage waveform comprising a latching pulse and an auxiliary pulse of amplitude smaller than the latching pulse. The amplitude of the auxiliary pulse is modulated to determine the latching effect of the latching pulse.
Inventors
- 👤 Ian Coulson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:49
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3622; G09G3/3629; G09G2310/00; G09G2310/06; G09G2310/061; G09G2310/065; G09G2320/00; G09G2320/02; G09G2320/0209; G09G2320/04; G09G2320/041
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
60 words
A method of addressing a display device comprising a matrix of separately operable pixels, the method comprising the step of applying across a given pixel a voltage waveform comprising a latching pulse and an auxiliary pulse of amplitude smaller than the latching pulse, the amplitude of the auxiliary pulse being modulated to determine the latching effect of the latching pulse.
Claim 2
Independent Claim
60 words
A method of addressing a display device comprising a matrix of separately operable pixels, the method comprising the step of applying across a given pixel a voltage waveform comprising a latching pulse and an auxiliary pulse of amplitude smaller than the latching pulse, the amplitude of the auxiliary pulse being modulated to determine the latching effect of the latching pulse.
Claim 3
Dependent Claim
15 words
A method according to claim 1, the amplitude of the latching pulse also being modulated.
Claim 4
Dependent Claim
18 words
A method according to claim 1 wherein the auxiliary pulse and the latching pulse have the same polarity.
Claim 5
Dependent Claim
16 words
A method according to claim 1 wherein the auxiliary pulse is temporally adjacent the latching pulse.
Claim 6
Dependent Claim
15 words
A method according to claim 4 wherein the auxiliary pulse immediately precedes the latching pulse.
Claim 7
Dependent Claim
15 words
A method according to claim 1 wherein said voltage waveform includes a further auxiliary pulse.
Claim 8
Dependent Claim
21 words
A method according to claim 1 wherein said voltage waveform includes a blanking pulse of opposite polarity to the latching pulse.
Claim 9
Dependent Claim
39 words
A method according to claim 1, said voltage waveform being produced by simultaneously applying a strobe voltage waveform and a data voltage waveform across said given pixel, modulation of the auxiliary pulse being effected by the data voltage waveform.
Claim 10
Dependent Claim
29 words
A method according to claim 8 including effecting temperature compensation by introducing a variable voltage component in the portion of the strobe voltage waveform corresponding to the auxiliary pulse.
Claim 11
Dependent Claim
58 words
A display device comprising a matrix of separately operable pixels and means for applying across a given pixel a voltage waveform comprising a latching pulse and an auxiliary pulse of amplitude smaller than the latching pulse, the applying means including means for modulating the amplitude of the auxiliary pulse to determine the latching effect of the latching pulse.
Claim 12
Dependent Claim
58 words
A display device comprising a matrix of separately operable pixels and means for applying across a given pixel a voltage waveform comprising a latching pulse and an auxiliary pulse of amplitude smaller than the latching pulse, the applying means including means for modulating the amplitude of the auxiliary pulse to determine the latching effect of the latching pulse.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-07-07 | 1996-01-06 | 1996-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-07 | 2000-01-06 | 2000-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-07 | 2004-01-06 | 2004-07-07 | $7700.00 | Window Closed / Lapsed |