US6449025B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-domain liquid crystal display device having field affecting electrode
Assignee: LG Display Co Ltd
•
Filing: 1999-07-20
•
Granted: 2002-09-10
•
Expires: 2019-07-20
Abstract
Abstract The present multi-domain liquid crystal display device includes first and second substrates facing each other, a liquid crystal layer between the first and second substrates, a plurality of gate bus lines arranged in a first direction on the first substrate and a plurality of data bus lines arranged in a second direction on the first substrate to define a pixel region, a thin film transistor positioned at a crossing area of the data bus line and the gate bus line and comprising a gate electrode, a semiconductor layer, and source/drain electrodes, a pixel electrode in the pixel region, a subsidiary electrode on the second substrate, a color filter layer on the subsidiary electrode, a common electrode on the color filter layer, and an alignment layer on at least one substrate between the first and second substrates.
Inventors
- 👤 Yun Bok Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:36
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133707; G02F1/1343; G02F1/134309; G02F1/134336; G02F2201/00; G02F2201/12; G02F2201/121; G02F2201/128
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
164 words
A multi-domain liquid crystal display device comprising: first and second substrates facing each other; a liquid crystal layer between said first and second substrates; a plurality of gate bus lines arranged in a first direction on said first substrate and a plurality of data bus lines arranged in a second direction on said first substrate to define a pixel region; a thin film transistor positioned at a crossing area of said data bus line and said gate bus line and comprising a gate electrode, a semiconductor layer and source/drain electrodes; a pixel electrode in said pixel region; a field-affecting electrode for having a voltage applied thereto on said second substrate; a color filter layer on said field-affecting electrode; and a common electrode on said color filter layer; wherein the field-affecting electrode and the common electrode distort electric field applied between said first and second substrate, and whereby the field-affecting electrode is formed surrounding said pixel region enabling a multi-domain effect within the pixel region.
Claim 2
Dependent Claim
164 words
A multi-domain liquid crystal display device comprising: first and second substrates facing each other; a liquid crystal layer between said first and second substrates; a plurality of gate bus lines arranged in a first direction on said first substrate and a plurality of data bus lines arranged in a second direction on said first substrate to define a pixel region; a thin film transistor positioned at a crossing area of said data bus line and said gate bus line and comprising a gate electrode, a semiconductor layer and source/drain electrodes; a pixel electrode in said pixel region; a field-affecting electrode for having a voltage applied thereto on said second substrate; a color filter layer on said field-affecting electrode; and a common electrode on said color filter layer; wherein the field-affecting electrode and the common electrode distort electric field applied between said first and second substrate, and whereby the field-affecting electrode is formed surrounding said pixel region enabling a multi-domain effect within the pixel region.
Claim 3
Dependent Claim
23 words
The multi-domain liquid crystal display device according to claim 1 , wherein said field-affecting electrode is located corresponding to said thin film transistor.
Claim 4
Dependent Claim
21 words
The multi-domain liquid crystal display device according to claim 1 , wherein said field-affecting electrode acts as a light shielding layer.
Claim 5
Dependent Claim
27 words
The multi-domain liquid crystal display device according to claim 1 , further comprising an alignment layer on at least one substrate between said first and second substrates.
Claim 6
Dependent Claim
41 words
The multi-domain liquid crystal display device according to claim 4 , wherein said alignment layer is divided into at least two portions, liquid crystal molecules in said liquid crystal layer corresponding to said two portions are aligned differently from each other.
Claim 7
Dependent Claim
22 words
The multi-domain liquid crystal display device according to claim 5 , wherein at least one portion of said alignment layer is alignment-treated.
Claim 8
Dependent Claim
21 words
The multi-domain liquid crystal display device according to claim 5 , wherein all portions of said alignment layer portions are non-alignment-treated.
Claim 9
Dependent Claim
22 words
The multi-domain liquid crystal display device according to claim 5 , wherein at least one portion of said alignment layer is rubbing-treated.
Claim 10
Dependent Claim
35 words
The multi-domain liquid crystal display device according to claim 8 , wherein said alignment layer includes a material selected from the group consisting of polyimide and polyamide based materials, PVA(polyvinylalcohol), polyamic acid, and silicon dioxide.
Claim 11
Dependent Claim
22 words
The multi-domain liquid crystal display device according to claim 5 , wherein at least one portion of said alignment layer is photo-alignment-treated.
Claim 12
Dependent Claim
30 words
The multi-domain liquid crystal display device according to claim 10 , wherein said alignment layer includes a material selected from the group consisting of PVCN(polyvinylcinnamate), PSCN(polysiloxanecinnamate), and CelCN(cellulosecinnamate) based materials.
Claim 13
Dependent Claim
22 words
The multi-domain liquid crystal display device according to claim 10 , wherein said at least one portion is photo-alignment-treated with ultraviolet light.
Claim 14
Dependent Claim
26 words
The multi-domain liquid crystal display device according to claim 10 , wherein said at least one portion is photo-alignment-treated by irradiating light at least one time.
Claim 15
Dependent Claim
21 words
The multi-domain liquid crystal display device according to claim 1 , further comprising an overcoat layer on said color filter layer.
Claim 16
Dependent Claim
21 words
The multi-domain liquid crystal display device according to claim 1 , further comprising a gate insulator on said gate bus lines.
Claim 17
Dependent Claim
20 words
The multi-domain liquid crystal display device according to claim 15 , said gate insulator has an electric field inducing window.
Claim 18
Dependent Claim
20 words
The multi-domain liquid crystal display device according to claim 1 , further comprising a passivation layer below said pixel electrode.
Claim 19
Dependent Claim
21 words
The multi-domain liquid crystal display device according to claim 17 , wherein said passivation layer has an electric field inducing window.
Claim 20
Dependent Claim
30 words
The multi-domain liquid crystal display device according to claim 1 , wherein said pixel electrode includes a material selected from the group consisting of ITO(indium tin oxide), aluminum, and chromium.
Claim 21
Dependent Claim
18 words
The multi-domain liquid crystal display device according to claim 1 , wherein said field-affecting electrode includes a metal.
Claim 22
Dependent Claim
16 words
The multi-domain liquid crystal display device according to claim 20 , wherein said metal includes chromium.
Claim 23
Dependent Claim
19 words
The multi-domain liquid crystal display device according to claim 1 , wherein said common electrode includes ITO(indium tin oxide).
Claim 24
Dependent Claim
21 words
The multi-domain liquid crystal display device according to claim 1 , wherein said pixel region has an electric field inducing window.
Claim 25
Dependent Claim
17 words
The multi-domain liquid crystal display device according to claim 1 , wherein said pixel electrode is patterned.
Claim 26
Dependent Claim
41 words
The multi-domain liquid crystal display device according to claim 1 , wherein said pixel region is divided into at least two portions, liquid crystal molecules in said liquid crystal layer corresponding to said two portions are driven differently from each other.
Claim 27
Dependent Claim
24 words
The multi-domain liquid crystal display device according to claim 1 , wherein said liquid crystal layer includes liquid crystal molecules having positive dielectric anisotropy.
Claim 28
Dependent Claim
24 words
The multi-domain liquid crystal display device according to claim 1 , wherein said liquid crystal layer includes liquid crystal molecules having negative dielectric anisotropy.
Claim 29
Dependent Claim
23 words
The multi-domain liquid crystal display device according to claim 1 , wherein said liquid crystal layer includes liquid crystal molecules having chiral dopants.
Claim 30
Dependent Claim
28 words
The multi-domain liquid crystal display device according to claim 1 , further comprising: a negative uniaxial film on at least one substrate between said first and second substrates.
Claim 31
Dependent Claim
28 words
The multi-domain liquid crystal display device according to claim 1 , further comprising: a negative biaxial film on at least one substrate between said first and second substrates.
Claim 32
Dependent Claim
30 words
The multi-domain liquid crystal display device according to claim 1 , wherein said liquid crystal layer includes liquid crystal molecules aligned homogeneously to surfaces of said first and second substrates.
Claim 33
Dependent Claim
30 words
The multi-domain liquid crystal display device according to claim 1 , wherein said liquid crystal layer includes liquid crystal molecules aligned homeotropically to surfaces of said first and second substrates.
Claim 34
Dependent Claim
30 words
The multi-domain liquid crystal display device according to claim 1 , wherein said liquid crystal layer includes liquid crystal molecules aligned tiltedly to surfaces of said first and second substrates.
Claim 35
Dependent Claim
30 words
The multi-domain liquid crystal display device according to claim 1 , wherein said liquid crystal layer includes liquid crystal molecules aligned twistedly to surfaces of said first and second substrates.
Claim 36
Dependent Claim
49 words
The multi-domain liquid crystal display device according to claim 1 , wherein said liquid crystal layer includes liquid crystal molecules aligned homogeneously to a surface of one of said first and second substrates and are aligned homeotropically to a surface of the other of said first and second substrates.
Claim 37
Dependent Claim
107 words
A multi-domain liquid crystal display device comprising: first and second substrates facing each other; data bus lines crossing on said first substrate; a pixel electrode on said first substrate; gate bus lines crossing said data bus lines to define a pixel region; a light shielding subsidiary electrode for having a voltage applied thereto on said second substrate; a common electrode on said light shielding subsidiary electrode; wherein the light shielding subsidiary electrode and the common electrode distort electric field applied between said first and second substrate, and whereby the light shielding subsidiary electrode is formed surrounding said pixel region enabling a multi-domain effect within the pixel region.
Claim 38
Dependent Claim
107 words
A multi-domain liquid crystal display device comprising: first and second substrates facing each other; data bus lines crossing on said first substrate; a pixel electrode on said first substrate; gate bus lines crossing said data bus lines to define a pixel region; a light shielding subsidiary electrode for having a voltage applied thereto on said second substrate; a common electrode on said light shielding subsidiary electrode; wherein the light shielding subsidiary electrode and the common electrode distort electric field applied between said first and second substrate, and whereby the light shielding subsidiary electrode is formed surrounding said pixel region enabling a multi-domain effect within the pixel region.
Claim 39
Dependent Claim
29 words
The multi-domain liquid crystal display device according to claim 36 , further comprising an n-line thin film transistor at a crossing area of said gate and data bus lines.
Claim 40
Dependent Claim
24 words
The multi-domain liquid crystal display device according to claim 36 , further comprising a gate insulator and a passivation layer on said first substrate.
Claim 41
Dependent Claim
21 words
The multi-domain liquid crystal display device according to claim 38 , wherein said gate insulator has an electric field inducing window.
Claim 42
Dependent Claim
21 words
The multi-domain liquid crystal display device according to claim 38 , wherein said passivation layer has an electric field inducing window.
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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) | 2005-09-09 | 2006-03-11 | 2006-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-09-09 | 2010-03-11 | 2010-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-09-09 | 2014-03-11 | 2014-09-10 | $7700.00 | Window Closed / Lapsed |