Patent US4943802A successfully refreshed from Google Patents.
US4943802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display device
Assignee: US Philips Corp
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Filing: 1989-03-03
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Granted: 1990-07-24
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Expires: 2009-03-03
Abstract
Abstract In an electro-optical display device (1), in which a plurality of tracks (8, 18) for the purpose of driving via active elements (9, 19) is provided on a supporting plate (2), the transparent electrodes (7, 11) on the other supporting plate (3) follow a meandering path so as to obtain an optimum color filter (21) with a so-called delta configuration.
Inventors
- 👤 Karel E. Kuijk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:49
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/367; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133514; G02F1/136; G02F1/1362; G02F1/1365; G09G3/3607; G02F1/13624; G02F2201/00; G02F2201/52; G09G2300/00; G09G2300/08; G09G2300/088; G09G2300/0895
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
161 words
A display device comprising an electro-optical display medium between two supporting plates, a system of pixels arranged in rows and columns, with each pixel being formed by picture electrodes arranged on the facing surfaces of the supporting plates, and a system of row and column electrodes for presenting selection and data signals across the pixels for the purpose of picture display, characterized in that the picture electrode on one of the supporting plates is connected in an electrically conducting manner to the common point of two non-linear switching units which are arranged in series between a column electrode for data signals and an auxiliary electrode for applying, prior to selection, an auxiliary voltage across the pixels beyond or on the limit of the voltage range to be used for picture display in that the column and the auxiliary electrodes are in a straight track and in that the other supporting plate is provided with row electrodes which follow a meandering path.
Claim 2
Dependent Claim
161 words
A display device comprising an electro-optical display medium between two supporting plates, a system of pixels arranged in rows and columns, with each pixel being formed by picture electrodes arranged on the facing surfaces of the supporting plates, and a system of row and column electrodes for presenting selection and data signals across the pixels for the purpose of picture display, characterized in that the picture electrode on one of the supporting plates is connected in an electrically conducting manner to the common point of two non-linear switching units which are arranged in series between a column electrode for data signals and an auxiliary electrode for applying, prior to selection, an auxiliary voltage across the pixels beyond or on the limit of the voltage range to be used for picture display in that the column and the auxiliary electrodes are in a straight track and in that the other supporting plate is provided with row electrodes which follow a meandering path.
Claim 3
Dependent Claim
24 words
A display device as claimed in claim 1, characterized in that the device comprises a colour filter whose colour elements coincide with the pixels.
Claim 4
Dependent Claim
34 words
A display device as claimed in claim 2, characterized in that identical colour elements of the colour filter are shifted relative to one another in the column direction over one and a half periods.
Claim 5
Dependent Claim
20 words
A display device as claimed in claim 1, characterized in that a switching unit comprises a plurality of switching elements.
Claim 6
Dependent Claim
18 words
A display device as claimed in claim 1 characterized in that the electro-optical medium is a liquid crystal.
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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) | 1993-07-23 | 1994-01-22 | 1994-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-23 | 1998-01-22 | 1998-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-23 | 2002-01-22 | 2002-07-24 | $7700.00 | Window Closed / Lapsed |