US6853425B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal display device and a method of manufacturing a viewing angle compensation film for the same
Assignee: LG Display Co Ltd
•
Filing: 2003-06-30
•
Granted: 2005-02-08
•
Expires: 2023-06-30
Abstract
Abstract A liquid crystal display (LCD) device include: first and second substrates, the first and second substrates having a plurality of pixels divided into at least two domains; a liquid crystal layer between the first and the second substrates, the liquid crystal layer having a different alignment direction in each domain; and first and second compensation films on outer surfaces of the first and second substrates, the first and second compensation films having a negative refractive anisotropy and having a triangle pattern.
Inventors
- 👤 Do-Sung Kim
- 👤 Seung-Jun Moon
- 👤 Do-Yeon Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:16
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/1337; G02F1/133753; G02F1/13363; G02F1/133632; G02F1/133707
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
87 words
A liquid crystal display (LCD) device, comprising: first and second substrates, the first and second substrates having a plurality of pixels divided into at least two domains; a liquid crystal layer between the first and the second substrates, the liquid crystal layer having a different alignment direction in each domain; and first and second compensation films on outer surfaces of the first and second substrates, respectively, the first and second compensation films having a negative refractive anisotropy and each having a cross section having a triangle pattern.
Claim 2
Dependent Claim
87 words
A liquid crystal display (LCD) device, comprising: first and second substrates, the first and second substrates having a plurality of pixels divided into at least two domains; a liquid crystal layer between the first and the second substrates, the liquid crystal layer having a different alignment direction in each domain; and first and second compensation films on outer surfaces of the first and second substrates, respectively, the first and second compensation films having a negative refractive anisotropy and each having a cross section having a triangle pattern.
Claim 3
Dependent Claim
14 words
The device of claim 1 , wherein the triangle pattern includes an isosceles triangle.
Claim 4
Dependent Claim
18 words
The device of claim 1 , wherein the first and second compensation films include a discotic liquid crystal.
Claim 5
Dependent Claim
29 words
The device of claim 3 , wherein the discotic liquid crystal has a tilt angle corresponding to an angle between a side and the base of the triangle pattern.
Claim 6
Dependent Claim
36 words
The device of claim 4 , wherein the liquid crystal layer includes TN (twisted nematic) mode liquid crystal molecules, and the discotic liquid crystal has a tilt angle between about ±0° (degree) and about ±15° (degree).
Claim 7
Dependent Claim
27 words
The device of claim 1 , wherein the pixel has two domains and a vertex of the triangle pattern corresponds to a boundary between the two domains.
Claim 8
Dependent Claim
58 words
The device of claim 1 , wherein the first substrate includes: gate and data lines crossing each other; a thin film transistor at a crossing portion of the gate and data lines; a pixel electrode connected to the thin film transistor; an auxiliary electrode substantially surrounding the pixel electrode; and a first alignment layer covering the pixel electrode.
Claim 9
Dependent Claim
38 words
The device of claim 1 , wherein the second substrate includes: a common electrode; a protrusion on the common electrode at a boundary between the two domains; and an alignment layer covering the common electrode and the protrusion.
Claim 10
Dependent Claim
46 words
The device of claim 1 , further comprising: a common electrode on the second substrate; a pixel electrode on the first substrate, the pixel electrode having a slit therein; and protrusions on the common electrode corresponding to edges of the pixel electrode on the first substrate.
Claim 11
Dependent Claim
17 words
The device of claim 9 , wherein the slit corresponds to a boundary between the two domains.
Claim 12
Dependent Claim
39 words
The device of claim 6 , wherein the second substrate includes: a common electrode; a protrusion on the common electrode at a boundary between the two domains; and a second alignment layer covering the common electrode and the protrusion.
Claim 13
Independent Claim
67 words
A method for manufacturing a viewing angle compensation film for a liquid crystal display (LCD) device, comprising: forming a compensation film material having a negative refractive anisotropy; forming a patterned mask on the compensation film material, the patterned mask having a plurality of triangle patterns; and forming a plurality of triangle patterns on the compensation film material by pressing the compensation film material against the patterned mask.
Claim 14
Independent Claim
67 words
A method for manufacturing a viewing angle compensation film for a liquid crystal display (LCD) device, comprising: forming a compensation film material having a negative refractive anisotropy; forming a patterned mask on the compensation film material, the patterned mask having a plurality of triangle patterns; and forming a plurality of triangle patterns on the compensation film material by pressing the compensation film material against the patterned mask.
Claim 15
Dependent Claim
14 words
The method of claim 12 , wherein the triangle pattern includes an isosceles triangle.
Claim 16
Dependent Claim
13 words
The method of claim 12 , wherein the patterned mask includes a metal.
Claim 17
Dependent Claim
18 words
The method of claim 12 , wherein the compensation film material is formed of a discotic liquid crystal.
Claim 18
Dependent Claim
29 words
The method of claim 15 , wherein the discotic liquid crystal has a tilt angle corresponding to an angle between a side and a base of the triangle pattern.
Claim 19
Dependent Claim
23 words
The method of claim 15 , wherein the discotic liquid crystal has a tilt angle between about ±0° (degree) and about ±15° (degree).
Claim 20
Dependent Claim
39 words
The method of claim 12 , wherein the plurality of triangle patterns is formed in the patterned mask and the patterned mask is disposed on the surface of the compensation film material facing a vertex of the triangle pattern.
Claim 21
Dependent Claim
143 words
A liquid crystal display (LCD) device, comprising: first and second substrates, the first and second substrates having a plurality of pixels divided into at least two domains; a liquid crystal layer between the first and the second substrates, the liquid crystal layer having a different alignment direction in each domain; a first compensation film on an outer surface of the first substrate, the first compensation film having an upper surface and a lower surface; and a second compensation film on an outer surface of the second substrate, the second compensation film having an upper surface and a lower surface, the first and second compensation films having a negative refractive anisotropy; wherein at least one of the first compensation film upper surface and lower surface and at least one of the second compensation film upper surface and lower surface has a triangular cross section.
Claim 22
Dependent Claim
143 words
A liquid crystal display (LCD) device, comprising: first and second substrates, the first and second substrates having a plurality of pixels divided into at least two domains; a liquid crystal layer between the first and the second substrates, the liquid crystal layer having a different alignment direction in each domain; a first compensation film on an outer surface of the first substrate, the first compensation film having an upper surface and a lower surface; and a second compensation film on an outer surface of the second substrate, the second compensation film having an upper surface and a lower surface, the first and second compensation films having a negative refractive anisotropy; wherein at least one of the first compensation film upper surface and lower surface and at least one of the second compensation film upper surface and lower surface has a triangular cross section.
Claim 23
Dependent Claim
27 words
The liquid crystal display device of claim 19 , wherein the first compensation film upper surface and the second compensation film upper surface have triangular cross sections.
Claim 24
Dependent Claim
43 words
The liquid crystal display device of claim 19 , wherein the first compensation film upper surface and first compensation film lower surface have triangular cross sections and the second compensation film upper surface and second compensation film lower surface have triangular cross sections.
Claim 25
Dependent Claim
20 words
The liquid crystal display device of claim 19 , wherein a width of the first compensation film does not vary.
Claim 26
Dependent Claim
27 words
The liquid crystal display device of claim 19 , wherein a tilt angle of the discotic liquid crystal is parallel to a surface of the compensation film.
Claim 27
Dependent Claim
19 words
The liquid crystal display device of claim 19 , wherein a width of the first compensation film does vary.
References Cited (Backward Citations)
US4691995A
Cited
US5309264A
Cited
US5666179A
Cited
US5608556A
Cited
US6784961B2
Cited
US6768526B2
Cited
US6798471B2
Cited
US20030048400A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2008-02-08 | 2008-08-09 | 2009-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2012-02-08 | 2012-08-09 | 2013-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2016-02-08 | 2016-08-09 | 2017-02-08 | $7700.00 | Window Closed / Lapsed |