US6407727B1
Expired / Lapsed
US
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Display device
Assignee: Dynamic Data Technologies LLC
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Filing: 1999-09-03
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Granted: 2002-06-18
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Expires: 2019-09-03
Abstract
Abstract Power consumption in driving ICs for electro-optical devices is reduced by driving all pixels in a frame to one extreme state and then introducing intermediate levels (grey-levels, colours) by multiplexing, using a reduced selection pulse width. In this way the number of level transitions for the extreme states and hence power dissipation is reduced.
Inventors
- 👤 Guido Plangger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:54
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3622; G09G2310/00; G09G2310/02; G09G2310/0243; G09G2310/0245; G09G2330/00; G09G2330/02; G09G2330/021; G09G3/2007; G09G3/2014
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
124 words
A display device comprising: an electro-optical display material between a first substrate provided with row electrodes and a second substrate provided with column electrodes, in which overlapping parts of the row and column electrodes define picture elements, and driving means for providing the row electrodes with selection pulses having a selection pulse width and a selection pulse voltage and for providing the column electrodes with data pulses, wherein the device further comprises: means for diminishing in operation the selection pulse widths within a frame time based on an extreme pulse width of the data pulses to be applied to the column electrodes within the frame time, and further driving means for applying, in operation, correction voltages across the picture elements during said frame time.
Claim 2
Dependent Claim
124 words
A display device comprising: an electro-optical display material between a first substrate provided with row electrodes and a second substrate provided with column electrodes, in which overlapping parts of the row and column electrodes define picture elements, and driving means for providing the row electrodes with selection pulses having a selection pulse width and a selection pulse voltage and for providing the column electrodes with data pulses, wherein the device further comprises: means for diminishing in operation the selection pulse widths within a frame time based on an extreme pulse width of the data pulses to be applied to the column electrodes within the frame time, and further driving means for applying, in operation, correction voltages across the picture elements during said frame time.
Claim 3
Dependent Claim
39 words
A display device as claimed in claim 1 wherein the means for diminishing the selection pulse widths comprise means to diminish the selection pulse widths by the minimum pulse width of the respective data pulses within the frame time.
Claim 4
Dependent Claim
53 words
A display device as claimed in claim 2 wherein the further driving means comprise means for providing the row electrodes simultaneously with a pulse having the minimum data pulse width within the frame time during the remainder of the frame time and means for simultaneously providing the column electrodes with a data pulse.
Claim 5
Dependent Claim
34 words
A display device as claimed in claim 3 , wherein the display further includes means to diminish each data pulse width by an amount the same as the diminution of the selection pulse widths.
Claim 6
Dependent Claim
21 words
A display device as claimed in claim 3 , wherein the driving means provide the column electrodes with pulse-width modulated signals.
Claim 7
Dependent Claim
22 words
A display device as claimed in claim 3 , wherein the frame period is maintained independent of the diminished selection pulse widths.
Claim 8
Dependent Claim
32 words
A display device as claimed in claim 2 wherein the device comprises means for causing the respective data pulses for a column for two subsequent selections to be combined in one pulse.
Claim 9
Dependent Claim
34 words
A display device as claimed in claim 7 , wherein the display further includes means to diminish each data pulse width by an amount the same as the diminution of the selection pulse widths.
Claim 10
Dependent Claim
34 words
A display device as claimed in claim 2 , wherein the display further includes means to diminish each data pulse width by an amount the same as the diminution of the selection pulse widths.
Claim 11
Dependent Claim
46 words
A display device as claimed in claim 1 wherein the means for diminishing the selection pulse widths comprises means to diminish the selection pulse widths by the minimum difference between the selection pulse width and the width of the respective data pulses within the frame time.
Claim 12
Dependent Claim
61 words
A display device as claimed in claim 10 wherein the further driving means comprise means for providing the row electrodes simultaneously with a pulse having a pulse width equal to the minimum difference between the maximum pulse width within the frame time during the remainder of the frame time and means for simultaneously providing the column electrodes with a non-data pulse.
Claim 13
Dependent Claim
34 words
A display device as claimed in claim 11 , wherein the display further includes means to diminish each data pulse width by an amount the same as the diminution of the selection pulse widths.
Claim 14
Dependent Claim
21 words
A display device as claimed in claim 11 , wherein the driving means provide the column electrodes with pulse-width modulated signals.
Claim 15
Dependent Claim
22 words
A display device as claimed in claim 11 , wherein the frame period is maintained independent of the diminished selection pulse widths.
Claim 16
Dependent Claim
34 words
A display device as claimed in claim 10 , wherein the display further includes means to diminish each data pulse width by an amount the same as the diminution of the selection pulse widths.
Claim 17
Dependent Claim
34 words
A display device as claimed in claim 1 , wherein the display further includes means to diminish each data pulse width by an amount the same as the diminution of the selection pulse widths.
Claim 18
Dependent Claim
21 words
A display device as claimed in claim 1 , wherein the driving means provide the column electrodes with pulse-width modulated signals.
Claim 19
Dependent Claim
22 words
A display device as claimed in claim 1 , wherein the frame period is maintained independent of the diminished selection pulse widths.
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) | 2005-06-17 | 2005-12-17 | 2006-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-06-17 | 2009-12-17 | 2010-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-06-17 | 2013-12-17 | 2014-06-18 | $7700.00 | Window Closed / Lapsed |