US5986735A
Expired / Lapsed
US
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In-plane switching mode liquid crystal display with alignment layers of different anchoring energies
Assignee: LG Display Co Ltd
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Filing: 1997-09-22
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Granted: 1999-11-16
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Expires: 2017-09-22
Abstract
Abstract An in-plane switching liquid crystal display device includes an inorganic alignment layer having low anchoring energy and an organic alignment layer having higher anchoring energy than that of the inorganic alignment layer. Applying the voltage between electrodes, only liquid crystal molecules in the vicinity of the inorganic alignment layer are affected by the electric field to be twisted about 90° in the liquid crystal layer.
Inventors
- 👤 Hiroshi Komatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:50
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G02F1/1333; G02F1/1337; G02F1/1343; G02F1/134309; G02F1/134363; G02F1/137; G02F1/139; G02F1/1396
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
140 words
A liquid crystal display device comprising: first and second substrates; a liquid crystal layer between the first substrate and the second substrate; a gate bus line and a data bus line crossing each other on the first substrate, the gate bus line and the data bus line defining a pixel region; a thin film transistor at a crossing region of the gate bus line and the data bus line; at least one pair of electrodes in the pixel region, the at least one pair of electrodes applying an electric field parallel to one of the first substrate and second substrate; a first alignment layer over the first substrate and having a first anchoring energy; and a second alignment layer over the second substrate and having a second anchoring energy different from the first anchoring energy of the first alignment layer.
Claim 2
Dependent Claim
140 words
A liquid crystal display device comprising: first and second substrates; a liquid crystal layer between the first substrate and the second substrate; a gate bus line and a data bus line crossing each other on the first substrate, the gate bus line and the data bus line defining a pixel region; a thin film transistor at a crossing region of the gate bus line and the data bus line; at least one pair of electrodes in the pixel region, the at least one pair of electrodes applying an electric field parallel to one of the first substrate and second substrate; a first alignment layer over the first substrate and having a first anchoring energy; and a second alignment layer over the second substrate and having a second anchoring energy different from the first anchoring energy of the first alignment layer.
Claim 3
Dependent Claim
28 words
The liquid crystal display device according to claim 1, wherein the first alignment layer and the second alignment layer include an inorganic layer and an organic layer respectively.
Claim 4
Dependent Claim
31 words
The liquid crystal display device according to claim 1, wherein the first anchoring energy of the first alignment layer is lower than the second anchoring energy of the second alignment layer.
Claim 5
Dependent Claim
25 words
The liquid crystal display device according to claim 1, wherein alignment directions of the first and second alignment layers are substantially parallel to each other.
Claim 6
Dependent Claim
25 words
The liquid crystal display device according to claim 4, wherein the alignment directions of the first and second alignment layers correspond to a rubbing process.
Claim 7
Dependent Claim
38 words
The liquid crystal display device according to claim 1, further comprising: a passivation layer over the first substrate; a shielding layer on the second substrate; and a color filter layer on the shielding layer and the second substrate.
Claim 8
Dependent Claim
18 words
The liquid crystal display device according to claim 1, wherein the liquid crystal layer includes a negative-type layer.
Claim 9
Dependent Claim
18 words
The liquid crystal display device according to claim 1, wherein the liquid crystal layer includes a positive-type layer.
Claim 10
Dependent Claim
152 words
A liquid crystal display device, comprising: first and second substrates; a liquid crystal layer between the first and second substrates; a plurality of the gate bus line and the data bus line respectively crossing each other on the first substrate, the gate bus line and the data bus line defining a plurality of pixel regions; a plurality of thin film transistors respectively at crossing regions of the gate bus line and the data bus line; at least one pair of electrodes in the pixel region over the first substrate; a first alignment layer over the first substrate, the first alignment layer having a first anchoring energy lower than a turning effect of the liquid crystal layer by the electric field; and a second alignment layer over the second substrate, the second alignment layer having a second anchoring energy higher than the turning effect of the liquid crystal layer by the electric field.
Claim 11
Dependent Claim
152 words
A liquid crystal display device, comprising: first and second substrates; a liquid crystal layer between the first and second substrates; a plurality of the gate bus line and the data bus line respectively crossing each other on the first substrate, the gate bus line and the data bus line defining a plurality of pixel regions; a plurality of thin film transistors respectively at crossing regions of the gate bus line and the data bus line; at least one pair of electrodes in the pixel region over the first substrate; a first alignment layer over the first substrate, the first alignment layer having a first anchoring energy lower than a turning effect of the liquid crystal layer by the electric field; and a second alignment layer over the second substrate, the second alignment layer having a second anchoring energy higher than the turning effect of the liquid crystal layer by the electric field.
Claim 12
Dependent Claim
17 words
The liquid crystal display device according to claim 9, wherein the first alignment layer includes inorganic layer.
Claim 13
Dependent Claim
17 words
The liquid crystal display device according to claim 9, wherein the second alignment layer includes organic layer.
Claim 14
Dependent Claim
15 words
The liquid crystal display device according to claim 11, wherein the organic layer includes polyimide.
Claim 15
Dependent Claim
31 words
The liquid crystal display device according to claim 8, wherein the first anchoring energy of the first alignment layer is lower than the second anchoring energy of the second alignment layer.
Claim 16
Dependent Claim
25 words
The liquid crystal display device according to claim 9, wherein alignment directions of the first and second alignment layers are substantially parallel to each other.
Claim 17
Dependent Claim
24 words
The liquid crystal display device according to claim 9, wherein alignment directions of the first and second alignment layers correspond to a rubbing process.
Claim 18
Dependent Claim
38 words
The liquid crystal display device according to claim 9, further comprising: a passivation layer over the first substrate; a shielding layer on the second substrate; and a color filter layer on the shielding layer and the second substrate.
Claim 19
Dependent Claim
18 words
The liquid crystal display device according to claim 9, wherein the liquid crystal layer includes a negative-type layer.
Claim 20
Dependent Claim
18 words
The liquid crystal display device according to claim 9, wherein the liquid crystal layer includes a positive-type layer.
Claim 21
Dependent Claim
194 words
A liquid crystal display device comprising: a first substrate having a first alignment layer over the first substrate; a second substrate having a second alignment layer over the second substrate; a liquid crystal layer between the first and second substrate; a gate bus line and a data bus line crossing each other on the first substrate, the gate bus line and the data bus line defining a pixel region; a thin film transistor at a crossing region of the gate bus line and the data bus line; at least one pair of electrodes in the pixel region, the at least one pair of electrodes applying an electric field parallel to one of the first substrate and second substrate; a passivation layer over the first substrate; a shielding layer on the second substrate; and a color filter layer on the shielding layer and the second substrate; wherein the first alignment layer has a first anchoring energy lower than a turning effect of the liquid crystal layer by the electric field; and wherein the second alignment layer has a second anchoring energy higher than the turning effect of the liquid crystal layer by the electric field.
Claim 22
Dependent Claim
194 words
A liquid crystal display device comprising: a first substrate having a first alignment layer over the first substrate; a second substrate having a second alignment layer over the second substrate; a liquid crystal layer between the first and second substrate; a gate bus line and a data bus line crossing each other on the first substrate, the gate bus line and the data bus line defining a pixel region; a thin film transistor at a crossing region of the gate bus line and the data bus line; at least one pair of electrodes in the pixel region, the at least one pair of electrodes applying an electric field parallel to one of the first substrate and second substrate; a passivation layer over the first substrate; a shielding layer on the second substrate; and a color filter layer on the shielding layer and the second substrate; wherein the first alignment layer has a first anchoring energy lower than a turning effect of the liquid crystal layer by the electric field; and wherein the second alignment layer has a second anchoring energy higher than the turning effect of the liquid crystal layer by the electric field.
Claim 23
Dependent Claim
18 words
The liquid crystal display device according to claim 19, wherein the liquid crystal layer includes a negative-type layer.
Claim 24
Dependent Claim
18 words
The liquid crystal display device according to claim 19, wherein the liquid crystal layer includes a positive-type layer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-11-15 | 2003-05-17 | 2003-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-11-15 | 2007-05-17 | 2007-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-11-15 | 2011-05-17 | 2011-11-16 | $7700.00 | Window Closed / Lapsed |