Patent US5576859A successfully refreshed from Google Patents.
US5576859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for improving the contrast of a liquid crystal screen and its method of manufacture through the use of opaque bands
Assignee: Thomson-LCD
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Filing: 1992-10-09
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Granted: 1996-11-19
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Expires: 2012-10-09
Abstract
Abstract A device for improving a contrast of a liquid crystal screen by using an opaque mask. The display screen includes a first plate, on one face of which are deposited elements with controlled transparence or reflectance and thin film components controlling these elements, and a back plate covering a face of the first plate including the elements with controlled transparence or reflectance and the thin film components. The elements are separated by opaque bands into lines and columns forming a grid. The opaque bands are deposited at least partially on the plate including the elements and the thin film components.
Inventors
- 👤 Donald Castleberry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:14
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G02F1/1362; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133512
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
111 words
A display screen comprising: a first plate on one face of which are deposited electrodes, thin film components controlling the electrodes and contact lines to which the thin film components are connected; a back plate comprising a counter-electrode covering a face of the first plate; a liquid crystal material formed between the first plate and the back plate; and opaque bands separating the deposited electrodes into lines and columns forming a criss-cross network, and the opaque bands being deposited at least partially on the first plate and partially on the back plate, at least a part of the opaque bands being deposited under the thin film components and the contact lines.
Claim 2
Dependent Claim
111 words
A display screen comprising: a first plate on one face of which are deposited electrodes, thin film components controlling the electrodes and contact lines to which the thin film components are connected; a back plate comprising a counter-electrode covering a face of the first plate; a liquid crystal material formed between the first plate and the back plate; and opaque bands separating the deposited electrodes into lines and columns forming a criss-cross network, and the opaque bands being deposited at least partially on the first plate and partially on the back plate, at least a part of the opaque bands being deposited under the thin film components and the contact lines.
Claim 3
Dependent Claim
117 words
A display screen comprising: a first plate on one face of which are deposited electrodes, thin film components controlling the electrodes and contact lines to which the thin film components are connected; a back plate comprising a counter-electrode covering a face of the first plate; a liquid crystal material formed between the first plate and the back plate; opaque bands separating the deposited electrodes into lines and columns forming a criss-cross network, and the opaque bands being deposited at least partially on the first plate, at least a part of the opaque bands being deposited under the thin film components and the contact lines; and opaque zones deposited on the back-plate to cover the thin film components.
Claim 4
Dependent Claim
117 words
A display screen comprising: a first plate on one face of which are deposited electrodes, thin film components controlling the electrodes and contact lines to which the thin film components are connected; a back plate comprising a counter-electrode covering a face of the first plate; a liquid crystal material formed between the first plate and the back plate; opaque bands separating the deposited electrodes into lines and columns forming a criss-cross network, and the opaque bands being deposited at least partially on the first plate, at least a part of the opaque bands being deposited under the thin film components and the contact lines; and opaque zones deposited on the back-plate to cover the thin film components.
Claim 5
Dependent Claim
23 words
The display screen according to claim 2, wherein the opaque bands cover the deposited electrodes over a width of 0.5 to 3 microns.
Claim 6
Dependent Claim
18 words
The display screen according to claim 2, wherein the opaque zones have a circular, square or hexagonal shape.
Claim 7
Dependent Claim
34 words
The display screen according to claim 2, wherein the opaque bands and opaque zones are at least partially made from a metal selected from the group consisting of titanium, chromium, molybdenum, aluminum and tungsten.
Claim 8
Dependent Claim
15 words
The display screen according to claim 2, wherein the thin film components comprise two terminations.
Claim 9
Dependent Claim
15 words
The display screen according to claim 2, wherein the thin film components comprise three terminations.
Claim 10
Dependent Claim
18 words
The display screen according to claim 2, wherein the display screen is a projection or direct vision screen.
Claim 11
Dependent Claim
114 words
A display screen comprising: a first plate on one face of which are deposited electrodes, thin film components controlling the electrodes and contact lines to which the thin film components are connected; a back plate comprising a counter-electrode covering a face of the first plate; a liquid crystal material formed between the first plate and the back plate; and opaque bands separating the deposited electrodes into lines and columns forming a criss-cross network, wherein the opaque bands comprise first segments extending between neighboring thin film components while covering corresponding contact lines of the neighboring thin film components, and second segments covering the thin film components while masking an interval between two consecutive first segments.
Claim 12
Dependent Claim
114 words
A display screen comprising: a first plate on one face of which are deposited electrodes, thin film components controlling the electrodes and contact lines to which the thin film components are connected; a back plate comprising a counter-electrode covering a face of the first plate; a liquid crystal material formed between the first plate and the back plate; and opaque bands separating the deposited electrodes into lines and columns forming a criss-cross network, wherein the opaque bands comprise first segments extending between neighboring thin film components while covering corresponding contact lines of the neighboring thin film components, and second segments covering the thin film components while masking an interval between two consecutive first segments.
Claim 13
Dependent Claim
20 words
The display screen according to claim 9, wherein the first opaque segments are deposited on or below the contact lines.
Claim 14
Dependent Claim
24 words
The display screen according to claim 9, wherein the second opaque segments are deposited on the back plate and cover the thin film components.
Claim 15
Dependent Claim
17 words
The display screen according to claim 9, wherein the second opaque segments are deposited under the counter-electrode.
Claim 16
Dependent Claim
25 words
The display screen according to claim 9, wherein the second opaque segments are deposited on the counter-electrode which is deposited directly on the back plate.
Claim 17
Dependent Claim
24 words
The display screen according to claim 9, wherein the first opaque segments cover the deposited electrodes over a width of 0.5 to 3 microns.
Claim 18
Dependent Claim
19 words
The display screen according to claim 9, wherein the second opaque segments have a circular, square or hexagonal shape.
Claim 19
Dependent Claim
34 words
The display screen according to claim 9, wherein the first and second opaque segments are at least partially made from a metal selected from the group consisting of titanium, chromium, molybdenum, aluminum and tungsten.
Claim 20
Dependent Claim
15 words
The display screen according to claim 9, wherein the thin film components comprise two terminations.
Claim 21
Dependent Claim
15 words
The display screen according to claim 9, wherein the thin film components comprise three terminations.
Claim 22
Dependent Claim
18 words
The display screen according to claim 9, wherein the display screen is a projection or direct vision screen.
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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) | 1999-11-19 | 2000-05-20 | 2000-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-19 | 2004-05-20 | 2004-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-19 | 2008-05-20 | 2008-11-19 | $7700.00 | Window Closed / Lapsed |