US6642985B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fringe field mode LCD shielded from electrostatic disturbances
Assignee: Hydis Technologies Co Ltd
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Filing: 2001-05-31
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Granted: 2003-11-04
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Expires: 2021-05-31
Abstract
Abstract The present invention discloses a fringe field switching mode liquid crystal display. The disclosed comprises: a lower and an upper substrates disposed opposite to each other at a predetermined distance, having transparency; a counter electrode and a pixel electrode disposed on the inner surface of the lower substrate with a gate insulating layer interposed and made of transparent conductors, forming a fringe field when a electric field is applied; a black matrix and color filter formed on the inner surface of the upper substrate; an ITO layer disposed on the inner surface of the upper substrate which has the black matrix and the color filter therein; and a liquid crystal layer interposed between the lower and the upper substrates, including a plurality of liquid crystal molecules of negative dielectric anisotropy. In the FFS mode LCD of the present invention, the counter electrode has a plate shape and the pixel electrode has a slit shape. And the counter electrode has one or more grooves whose width is smaller than that of the slit of the pixel electrode, preferably 2 or 3 μm and the ITO layer includes a window region therein.
Inventors
- 👤 Hyang Yul Kim
- 👤 Seung Hee Lee
- 👤 Seung Ho Hong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:38
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G02F1/1333; G02F1/1343; G02F1/134309; G02F1/134363; G02F2201/00; G02F2201/12; G02F2201/121
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
139 words
A fringe field switching mode liquid crystal display comprising: a lower substrate and an upper substrate disposed opposite to each other at a predetermined distance, each said substrate having transparency; a counter electrode and a pixel electrode disposed on the inner surface of the lower substrate with a gate insulating layer interposed and made of transparent conductors, forming a fringe field when an electric field is applied; a black matrix and color filter formed on the inner surface of the upper substrate; an ITO layer disposed on the inner surface of the upper substrate directly adjacent the black matrix and color filter; a first horizontal alignment layer disposed on the ITO layer of the upper substrate; and a liquid crystal layer interposed between the lower and upper substrates, including a plurality of liquid crystal molecules having negative dielectric anisotropy.
Claim 2
Dependent Claim
139 words
A fringe field switching mode liquid crystal display comprising: a lower substrate and an upper substrate disposed opposite to each other at a predetermined distance, each said substrate having transparency; a counter electrode and a pixel electrode disposed on the inner surface of the lower substrate with a gate insulating layer interposed and made of transparent conductors, forming a fringe field when an electric field is applied; a black matrix and color filter formed on the inner surface of the upper substrate; an ITO layer disposed on the inner surface of the upper substrate directly adjacent the black matrix and color filter; a first horizontal alignment layer disposed on the ITO layer of the upper substrate; and a liquid crystal layer interposed between the lower and upper substrates, including a plurality of liquid crystal molecules having negative dielectric anisotropy.
Claim 3
Dependent Claim
101 words
The fringe field switching mode liquid crystal display according to claim 1 , further comprising: a second horizontal alignment layer being disposed on the top of the lower substrate, having a predetermined rubbing axis, in an anti-parallel direction with that of the first horizontal alignment layer; a lower polarizing plate disposed on the outer surface of the lower substrate, having a polarizing axis in parallel with the rubbing axis of the first horizontal alignment layer; and an upper polarizing plate disposed on the outer surface of the upper substrate, having a polarizing axis perpendicular to that of the lower polarizing plate.
Claim 4
Dependent Claim
29 words
The fringe field switching mode liquid crystal display according to claim 1 , wherein the counter electrode has a plate shape and the pixel electrode has a slit shape.
Claim 5
Dependent Claim
22 words
The fringe field switching mode liquid crystal display according to claim 1 , wherein the counter electrode has one or more grooves.
Claim 6
Dependent Claim
22 words
The fringe field switching mode liquid crystal display according to claim 4 , wherein the groove is disposed under the pixel electrode.
Claim 7
Dependent Claim
29 words
The fringe field switching mode liquid crystal display according to claim 4 , wherein the width of the groove is smaller than that of slit of the pixel electrode.
Claim 8
Dependent Claim
24 words
The fringe field switching mode liquid crystal display according to claim 6 , wherein the width of the groove is 2 or 3 μm.
Claim 9
Dependent Claim
21 words
The fringe field switching mode liquid crystal display according to claim 1 , wherein the ITO layer includes a window region.
Claim 10
Dependent Claim
27 words
The fringe field switching mode liquid crystal display according to claim 1 , wherein the liquid crystal molecules has a phase retardation of 0.20 to 0.50 μm.
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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) | 2006-11-03 | 2007-05-05 | 2007-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-11-03 | 2011-05-05 | 2011-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-11-03 | 2015-05-05 | 2015-11-04 | $7700.00 | Window Closed / Lapsed |