Patent US5146356A successfully refreshed from Google Patents.
US5146356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Active matrix electro-optic display device with close-packed arrangement of diamond-like shaped
Assignee: Philips North America LLC
•
Filing: 1991-02-04
•
Granted: 1992-09-08
•
Expires: 2011-02-04
Abstract
Abstract An active matrix liquid crystal display device has diamond-shaped pixels arrayed in a close-packed arrangement, and interconnected by row and column electrodes which zigzag between the pixels, each column electrode extending between and being common to two columns of pixels and their associated thin film switches, and the column electrode-switch connections alternating sequentially between pixel columns.
Inventors
- 👤 Allan I. Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:18
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G02F1/1362
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
95 words
An active matrix electro-optic display device comprising an electro-optic material sandwiched between opposing walls, at least one of which is transparent, on one of the walls: an array of pixel electrodes; a switch associated with each pixel electrode, and an array of row and column electrodes interconnecting the pixel electrodes via the switches, the pixel electrodes being diamond-like shaped and arrayed in a close-packed arrangement; characterized in that: each column electrode extends between and is common to two columns of pixels and their associated switches; and the column electrode-switch connections alternate sequentially between pixel columns.
Claim 2
Dependent Claim
95 words
An active matrix electro-optic display device comprising an electro-optic material sandwiched between opposing walls, at least one of which is transparent, on one of the walls: an array of pixel electrodes; a switch associated with each pixel electrode, and an array of row and column electrodes interconnecting the pixel electrodes via the switches, the pixel electrodes being diamond-like shaped and arrayed in a close-packed arrangement; characterized in that: each column electrode extends between and is common to two columns of pixels and their associated switches; and the column electrode-switch connections alternate sequentially between pixel columns.
Claim 3
Dependent Claim
42 words
The device of claim 1 in which the row electrodes comprise legs extending between adjacent sides of the pixel electrodes and in close proximity near the corners of the pixel electrodes, thereby following a zig-zag pattern between the rows of pixel electrodes.
Claim 4
Dependent Claim
20 words
The device of claim 2 in which the column electrodes follow a zig-zag pattern between the columns of pixel electrodes.
Claim 5
Dependent Claim
21 words
The device of claim 3 in which the row and column electrodes cross over along adjacent sides of the pixel electrodes.
Claim 6
Dependent Claim
17 words
The device of claim 4 in which cross-over occurs substantially at the mid-points of the adjacent sides.
Claim 7
Dependent Claim
25 words
The device of claim 1 in which the switches comprise thin film transistors having source, drain and channel regions, and source, drain and gate electrodes.
Claim 8
Dependent Claim
39 words
The device of claim 2 in which the source electrode of each switch is connected to a column electrode, the gate electrode is a portion of a row electrode, and the drain electrode is connected to a pixel electrode.
Claim 9
Dependent Claim
22 words
The device of claim 6 in which the source, drain and channel regions of the thin film transistor switch comprise polycrystalline silicon.
Claim 10
Dependent Claim
20 words
The device of claim 8 in which each switch also comprises a second gate electrode extending from the row electrode.
Claim 11
Dependent Claim
38 words
The device of claim 9 in which the second gate electrode extends from one leg of the row electrode near and in a direction parallel to the gate electrode portion of an adjoining leg of the row electrode.
Claim 12
Dependent Claim
33 words
The device of claim 8 in which at least a portion of the row electrode adjacent to the top sides of a pixel comprise one electrode of a storage capacitor for the pixel.
Claim 13
Dependent Claim
21 words
The device of claim 1 in which the adjacent sides of the pixels are at approximately right angles to one another.
Claim 14
Dependent Claim
15 words
The device of claim 1 in which the electro-optic material is a liquid crystal material.
References Cited (Backward Citations)
US4373784A
Cited
US4761058A
Cited
US4778257A
Cited
US4907861A
Cited
JPS61254928A
Cited
JPS63142330A
Cited
US4986637A
Cited
US4811003A
Cited
US4922240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-09-08 | 1996-03-09 | 1996-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-08 | 2000-03-09 | 2000-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-08 | 2004-03-09 | 2004-09-08 | $7700.00 | Window Closed / Lapsed |