US3861783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal display featuring self-adjusting mosaic panel
Assignee: Raytheon Co
•
Filing: 1973-06-28
•
Granted: 1975-01-21
•
Expires: 1993-06-28
Abstract
Abstract A large liquid crystal display is formed by combining a plurality of semiconductor wafers carrying an X Y array of reflective back electrodes with a single large transparent front electrode.
Inventors
- 👤 Hans G Dill
- 👤 Alex M Leupp
- 👤 Darrell M Erb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:09
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/136; G02F1/1362; G02F1/136277; G02F1/13336; G02F2201/00; G02F2201/12; G02F2201/123; G02F2203/00; G02F2203/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
174 words
A liquid crystal display panel comprising in combination: a. a transparent front plate having a transparent electrode thereon; b. a plurality of semiconductor wafers arranged side-by-side to form a coplanar array, each having 1. a plurality of electrodes distributed over one of its faces, 2. a spacer structure of uniform height extending from said one of its faces into abutment against said front plate, and 3. contacts on the opposite one of its faces and means for operatively connecting said plurality of electrodes to said contacts; c. a backing plate extending parallel to and maintained a fixed distance from said front plate; d. a flexible insulating sheet compressed between the said opposite faces of said wafers and said backing plate; and e. a plurality of flexible conducting pads on said insulating sheEt located to provide a bridging contact between contacts of adjacent ones of said wafers, whereby random variations in wafer thickness are compensated by differential compression of said insulating sheet; f. a nematic liquid crystal material confined between said front and back plates.
Claim 2
Dependent Claim
174 words
A liquid crystal display panel comprising in combination: a. a transparent front plate having a transparent electrode thereon; b. a plurality of semiconductor wafers arranged side-by-side to form a coplanar array, each having 1. a plurality of electrodes distributed over one of its faces, 2. a spacer structure of uniform height extending from said one of its faces into abutment against said front plate, and 3. contacts on the opposite one of its faces and means for operatively connecting said plurality of electrodes to said contacts; c. a backing plate extending parallel to and maintained a fixed distance from said front plate; d. a flexible insulating sheet compressed between the said opposite faces of said wafers and said backing plate; and e. a plurality of flexible conducting pads on said insulating sheEt located to provide a bridging contact between contacts of adjacent ones of said wafers, whereby random variations in wafer thickness are compensated by differential compression of said insulating sheet; f. a nematic liquid crystal material confined between said front and back plates.
Claim 3
Dependent Claim
20 words
a spacer structure of uniform height extending from said one of its faces into abutment against said front plate, and
Claim 4
Dependent Claim
20 words
a spacer structure of uniform height extending from said one of its faces into abutment against said front plate, and
Claim 5
Dependent Claim
37 words
The liquid crystal display panel of claim 1 characterized further in that said electrical contacts comprise a plurality of edge connectors which extend around the edges of said wafers from said one surface to said opposite surface.
Claim 6
Dependent Claim
108 words
contacts on the opposite one of its faces and means for operatively connecting said plurality of electrodes to said contacts; c. a backing plate extending parallel to and maintained a fixed distance from said front plate; d. a flexible insulating sheet compressed between the said opposite faces of said wafers and said backing plate; and e. a plurality of flexible conducting pads on said insulating sheEt located to provide a bridging contact between contacts of adjacent ones of said wafers, whereby random variations in wafer thickness are compensated by differential compression of said insulating sheet; f. a nematic liquid crystal material confined between said front and back plates.
Claim 7
Dependent Claim
108 words
contacts on the opposite one of its faces and means for operatively connecting said plurality of electrodes to said contacts; c. a backing plate extending parallel to and maintained a fixed distance from said front plate; d. a flexible insulating sheet compressed between the said opposite faces of said wafers and said backing plate; and e. a plurality of flexible conducting pads on said insulating sheEt located to provide a bridging contact between contacts of adjacent ones of said wafers, whereby random variations in wafer thickness are compensated by differential compression of said insulating sheet; f. a nematic liquid crystal material confined between said front and back plates.
Claim 8
Dependent Claim
139 words
The liquid crystal display panel of claim 1 characterized further in that: a. said plurality of electrodes on each said wafer is arranged in an ordered array of spaced apart columns and rows, b. said means for operatively connecting includes a set of individual X and Y drive line segments running along said one surface of said wafer between said columns and rows of electrodes and means for establishing electrical contact between the respective ends of said drive line segments on said one surface and a respecstive pair of said contacts on said opposite surface, and c. said conducting pads are located on said flexible sheet in registry with the corresponding X and Y electrical contacts of adjacent pairs of said wafers so as to establish continuity between corresponding X and Y drive line segments of said adjacent wafers.
Claim 9
Dependent Claim
126 words
A liquid crystal display panel comprising in combination: a. a transparent electrode and means for maintaining it flat and rigid, b. a plurality of four-sided semiconductor wafers arranged side-by-side, parallel to and equally spaced from said electrode, said wafers randomly varying in thickness and having electrodes facing said transparent electrode, c. a backing plate extending parallel to and maintained a fixed distance from said transparent electrode, d. compressable means extending between said wafers and said backing plate to compensate for said random wafer thickness in variation, and e. means including flexible conductors between said flexible means and said wafers, for establishing common electrical connections to the electrodes of several of said wafers, f. a nematic liquid material confined between said backing plate and said transparent electrode.
Claim 10
Dependent Claim
126 words
A liquid crystal display panel comprising in combination: a. a transparent electrode and means for maintaining it flat and rigid, b. a plurality of four-sided semiconductor wafers arranged side-by-side, parallel to and equally spaced from said electrode, said wafers randomly varying in thickness and having electrodes facing said transparent electrode, c. a backing plate extending parallel to and maintained a fixed distance from said transparent electrode, d. compressable means extending between said wafers and said backing plate to compensate for said random wafer thickness in variation, and e. means including flexible conductors between said flexible means and said wafers, for establishing common electrical connections to the electrodes of several of said wafers, f. a nematic liquid material confined between said backing plate and said transparent electrode.
Claim 11
Dependent Claim
52 words
A liquid crystal display panel in accordance with claim 4 and characterized further in that: a. said flexible means is in the form of a common insulating sheet extending under a plurality of said wafers, and b. said flexible conductors comprise a patterned metal layer adherent to and flexible with said sheet.
Claim 12
Dependent Claim
117 words
A liquid crystal display panel in accordance with claim 4 and characterized further in that said wafers have: a. arrays of electrodes arranged in mutually aligned columns and rows so as to collectively form a single, large coplanar array of such electrodes, b. row and column drive line segments operatively connected to said electrodes and arranged in mutually aligned columns and rows so as to collectively form parts of row and column drive lines for each row and each column of said large array, and c. said display panel being further characterized in that said flexible conductors are positioned to provide bridging contacts between the column and row drive line segments of adjacent ones of said wafers.
Claim 13
Dependent Claim
44 words
A liquid crystal display panel in accordance with claim 6 characterized further in that said drive line segments extend along the top surfaces of said wafers and terminate in edge connectors which extend around the four edges of said wafers to their bottom surfaces.
Claim 14
Dependent Claim
57 words
A liquid crystal display panel in accordance with claim 7 and characterized further in that said flexible means is in the form of a common sheet extending under said wafers and said flexible conductors are comprised of a patterned metal layer carried by such sheet, elements of said patterned metal layer underlying the edges of said wafers.
References Cited (Backward Citations)
US3765011A
Cited
US3716290A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |