Patent US557117A successfully refreshed from Google Patents.
Patent US5404236A successfully refreshed from Google Patents.
US5404236A
Expired / Lapsed
US
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Display device with crossing electrodes with specific ratio for gray scale
Assignee: US Philips Corp
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Filing: 1994-07-08
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Granted: 1995-04-04
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Expires: 2014-07-08
Abstract
Abstract An electro-optic display device with grey scale set by areas of crossing electrodes. In one embodiment, there are 3 strip-shaped sub electrodes with a width relationship of 4:2:1, and two strip shaped column electrodes with a relationship of 8:1. In a second embodiment, there are 4 strip-shaped sub electrodes with a width relationship of 8:4:2:1, and two strip shaped column electrodes with a relationship of 16:1.
Inventors
- 👤 Wilbert J. A. M. Hartmann
- 👤 Johannes A. M. M. Van Haaren
- 👤 Antonius G. H. Verhulst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:57
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1343; G02F1/134309; G02F1/134336; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3607; G02F1/134345; G09G3/2007; G09G3/2074
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
85 words
A display device comprising an electro-optical medium between two supporting plates comprising a plurality of display cells at the area of crossings of strip-shaped row and column electrodes, the column and row electrodes being divided into strip-shaped sub-electrodes characterized in that the column electrodes are divided into three strip-shaped sub-electrodes having a width ratio 4:2:1 and the row electrodes are divided into two strip-shaped sub-electrodes the sub-electrodes of the row electrodes at the area of the crossing having a width ratio of at least 8:1.
Claim 2
Dependent Claim
85 words
A display device comprising an electro-optical medium between two supporting plates comprising a plurality of display cells at the area of crossings of strip-shaped row and column electrodes, the column and row electrodes being divided into strip-shaped sub-electrodes characterized in that the column electrodes are divided into three strip-shaped sub-electrodes having a width ratio 4:2:1 and the row electrodes are divided into two strip-shaped sub-electrodes the sub-electrodes of the row electrodes at the area of the crossing having a width ratio of at least 8:1.
Claim 3
Dependent Claim
30 words
A display device as claimed in claim 1, characterized in that each strip-shaped sub-electrode of a row electrode is passed to the exterior at different sides of the cross-bar system.
Claim 4
Dependent Claim
24 words
A device as claimed in claim 2, characterized in that at least one sub-electrode is located at least partially between portion of another sub-electrode.
Claim 5
Dependent Claim
19 words
A device as claimed in claim 2, characterized in that the electro-optical medium is a ferro-electric liquid crystal material.
Claim 6
Dependent Claim
21 words
A device as claimed in claim 1, characterized in that at least one sub-electrode is located between parts of other sub-electrodes.
Claim 7
Dependent Claim
19 words
A device as claimed in claim 5, characterized in that the electro-optical medium is a ferro-electric liquid crystal material.
Claim 8
Dependent Claim
25 words
The device as claimed in claim 5, characterized in that a sub-electrode is at least partially surrounded by another sub-electrode having the next larger surface.
Claim 9
Dependent Claim
26 words
A device as claimed in claim 7, characterized in that a sub-electrode which is the next larger in surface area size substantially entirely surrounds a sub-electrode.
Claim 10
Dependent Claim
19 words
A device as claimed in claim 7, characterized in that the electro-optical medium is a ferro-electric liquid crystal material.
Claim 11
Dependent Claim
19 words
A device as claimed in claim 8, characterized in that the electro-optical medium is a ferro-electric liquid crystal material.
Claim 12
Dependent Claim
19 words
A device as claimed in claim 1, characterized in that the electro-optical medium is a ferro-electric liquid crystal material.
Claim 13
Dependent Claim
19 words
A device as claimed in claim 1, characterized in that the electro-optical medium is a ferro-electric liquid crystal material.
Claim 14
Dependent Claim
34 words
The display device of claim 1 wherein the narrowest and the widest of the sub-electrodes of a column electrode are passed to the exterior at one and the same side of the cross-bar system.
Claim 15
Dependent Claim
24 words
A device as claimed in claim 13, characterized in that at least one sub-electrode is located at least partially between portions of another sub-electrode.
Claim 16
Dependent Claim
85 words
A display device comprising an electro-optical medium between two supporting plates comprising a plurality of display cells at the area of crossings of strip-shaped row and column electrodes, the column and row electrodes being divided into strip-shaped sub-electrodes characterized in that the column electrodes are divided into four strip-shaped sub-electrodes having a width ratio 8:4:2:1 and the row electrodes are divided into two strip-shaped sub-electrode the sub-electrodes of the row electrodes at the area of the crossing having a width ratio of at least 16:1.
Claim 17
Dependent Claim
85 words
A display device comprising an electro-optical medium between two supporting plates comprising a plurality of display cells at the area of crossings of strip-shaped row and column electrodes, the column and row electrodes being divided into strip-shaped sub-electrodes characterized in that the column electrodes are divided into four strip-shaped sub-electrodes having a width ratio 8:4:2:1 and the row electrodes are divided into two strip-shaped sub-electrode the sub-electrodes of the row electrodes at the area of the crossing having a width ratio of at least 16:1.
Claim 18
Dependent Claim
30 words
A display device as claimed in claim 15, characterized in that each strip-shaped sub-electrode of a row electrode is passed to the exterior at different sides of the cross-bar system.
Claim 19
Dependent Claim
22 words
A device as claimed in claim 16, characterized in that at least one sub-electrode is located between parts of the other sub-electrodes.
Claim 20
Dependent Claim
24 words
A device as claimed in claim 15, characterized in that at least one sub-electrode is located at least partially between portions of another sub-electrode.
Claim 21
Dependent Claim
25 words
The device as claimed in claim 18, characterized in that a sub-electrode is at least partially surrounded by another sub-electrode having the next lager surface.
Claim 22
Dependent Claim
25 words
A device as claimed in claim 19, characterized in that a sub-electrode is the next larger in surface area size substantially entirely surrounds a sub-electrode.
Claim 23
Dependent Claim
19 words
A device as claimed in claim 19, characterized in that the electro-optical medium is a ferro-electric liquid crystal material.
Claim 24
Dependent Claim
19 words
A device as claimed in claim 15, characterized in that the electro-optical medium is a ferro-electric liquid crystal material.
Claim 25
Dependent Claim
34 words
The display device of claim 15 wherein the narrowest and the widest of the sub-electrodes of a column electrode are passed to the exterior at one and the same side of the cross-bar system.
Claim 26
Dependent Claim
24 words
A device as claimed in claim 23, characterized in that at least one sub-electrode is located at least partially between portions of another sub-electrode.
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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) | 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 |