In-plane switching liquid crystal display device and method
View Patent ↗An in-plane switching liquid crystal display device includes a first substrate, a second substrate spaced apart from the first substrate, a liquid crystal layer between the first and second substrates, a first polarizer at an outer surface of the first substrate, the first polarizer including a first polarization film and first inner and outer supporting film at both sides of the first polarization film, the first inner supporting film adjacent to the first substrate and having a retardation within a range of about −10 nm to about +10 nm, and a second polarizer at an outer surface of the second substrate, the second polarizer including a second polarization film and second inner and outer supporting film at both sides of the second polarization film, the second inner supporting film adjacent to the second substrate.
1. An in-plane switching liquid crystal display device, comprising:
a first substrate;
a second substrate spaced apart from the first substrate;
a liquid crystal layer between the first and second substrates;
a first polarizer at an outer surface of the first substrate, the first polarizer including a first polarization film and first inner and outer supporting films at opposite sides of the first polarization film, the first inner supporting film adjacent to the first substrate and having a retardation value within a range of about −10 nm to about +10 nm; and
a second polarizer at an outer surface of the second substrate, the second polarizer including a second polarization film and second inner and outer supporting films, at opposite sides of the second polarization film, the second inner supporting film adjacent to the second substrate,
wherein a color shift from viewing the in-plane switching liquid crystal display device is minimized to a range of about 0.2-0.3 for “x” coordinate and 0.2-0.3 for “y” coordinate in the International Commission on Illumination (CIE) chromaticity diagram.
2. The device according to claim 1 , wherein the second inner supporting film has a retardation value within a range of about −10 nm to about +10 nm.
3. The device according to claim 2 , wherein the second inner supporting film includes a material selected from the group consisting of polyethylene terephthalate polymer, polyethylene naphthalate polymer, polyester polymer, polyethylene polymer, polypropylene polymer, polyvinylidene chloride polymer, polyvinyl alcohol polymer, polyethylene vinyl alcohol polymer, polystyrene polymer, polycarbonate polymer, norbomene polymer, poly methyl pentene polymer, polyether ketone polymer, polyether sulfone polymer, polysulfone polymer, polyether ketone imide polymer, polyamide polymer, polymethacrylate polymer, polyacrylate polymer, polyarylate polymer and fluoropolymer polymer.
4. The device according to claim 1 , wherein the liquid crystal layer has a rubbing direction substantially parallel to the first light transmissive axis.
5. The device according to claim 1 , wherein the first polarizer has a first light transmissive axis substantially perpendicular to a second light transmissive axis of the second polarizer.
6. The device according to claim 1 , wherein the first and second polarization films include poly-vinyl alcohol.
7. The device according to claim 1 , wherein the first inner and outer supporting films and the second inner and outer supporting films include tri-acetyl cellulose.
8. The device according to claim 1 , wherein light passes from the first polarizer to the second polarizer.
9. The device according to claim 1 , further comprising a thin film transistor, a pixel electrode and a common electrode on the first substrate.
10. The device according to claim 9 , further comprising a color filter layer and a black matrix on the second substrate.
11. The device according to claim 1 , wherein the first inner supporting film includes a material selected from the group consisting of polyethylene terephthalate polymer, polyethylene naphthalate polymer, polyester polymer, polyethylene polymer, polypropylene polymer, polyvinylidene chloride polymer, polyvinyl alcohol polymer, polyethylene vinyl alcohol polymer, polystyrene polymer, polycarbonate polymer, norbomene polymer, poly methyl pentene polymer, polyether ketone polymer, polyether sulfone polymer, polysulfone polymer, polyether ketone imide polymer, polyamide polymer, polymethacrylate polymer, polyacrylate polymer, polyarylate polymer and fluoropolymer polymer.
12. A method of manufacturing a liquid crystal display device comprising:
providing first and second substrates;
providing liquid crystal between the first and second substrates;
providing a first polarizer on an outer surface of the first substrate, the first polarizer including a first polarization film and first inner and outer supporting films, at opposite sides of the first polarization film, the first inner supporting film adjacent to the first substrate and having a retardation value within a range of about −10 nm to about +10 nm; and
providing a second polarizer on an outer surface of the second substrate, the second polarizer including a second polarization film and second inner and outer supporting films at opposite sides of the second polarization film, the second inner polarization film adjacent to the second substrate,
wherein a color shift from viewing the in-plane switching liquid crystal display device is minimized to a range of about 0.2-0.3 for “x” coordinate and 0.2-0.3 for “y” coordinate in the Intematinal Commission on Illumination (CIE) chromaticity diagram.
13. The method according to claim 12 , wherein the second inner supporting film has a retardation value within a range of about −10 nm to about +10 nm.
14. The method according to claim 13 , wherein the second inner supporting film includes a material selected from the group consisting of polyethylene terephthalate polymer, polyethylene naphthalate polymer, polyester polymer, polyethylene polymer, polypropylene polymer, polyvinylidene chloride polymer, polyvinyl alcohol polymer, polyethylene vinyl alcohol polymer, polystyrene polymer, polycarbonate polymer, norbornene polymer, poly methyl pentene polymer, polyether ketone polymer, polyether sulfone polymer, polysulfone polymer, polyether ketone imide polymer, polyamide polymer, polymethacrylate polymer, polyacrylate polymer, polyarylate polymer and fluoropolymer polymer.
15. The method according to claim 12 , wherein the liquid crystal layer has a rubbing direction substantially parallel to the first light transmissive axis.
16. The method according to claim 12 , wherein the first polarizer has a first light transmissive axis substantially perpendicular to a second light transmissive axis of the second polarizer.
17. The method according to claim 12 , wherein the first and second polarization films include poly-vinyl alcohol.
18. The method according to claim 12 , wherein the first inner and outer supporting films and the second inner and outer supporting films include tri-acetyl cellulose.
19. The method according to claim 12 , wherein light passes from the first polarizer to the second polarizer.
20. The method according to claim 12 , further comprising a step of forming a thin film transistor, a pixel electrode and a common electrode on the first substrate.
21. The method according to claim 20 , further comprising a step of forming a color filter layer and a black matrix on the second substrate.
22. The method according to claim 12 , wherein the first inner supporting film includes a material selected from the group consisting of polyethylene terephthalate polymer, polyethylene naphthalate polymer, polyester polymer, polyethylene polymer, polypropylene polymer, polyvinylidene chloride polymer, polyvinyl alcohol polymer, polyethylene vinyl alcohol polymer, polystyrene polymer, polycarbonate polymer, norbomene polymer, poly methyl pentene polymer, polyether ketone polymer, polyether sulfone polymer, polysulfone polymer, polyether ketone imide polymer, polyamide polymer, polymethacrylate polymer, polyacrylate polymer, polyarylate polymer and fluoropolymer polymer.
23. An in-plane switching liquid crystal display device, comprising:
a first substrate;
a second substrate spaced apart from the first substrate;
a liquid crystal layer between the first and second substrates;
a first polarizer at an outer surface of the first substrate, the first polarizer including a first polarization film and first inner and outer supporting films at opposite sides of the first polarization film, the first inner supporting film adjacent to the first substrate; and
a second polarizer at an outer surface of the second substrate, the second polarizer including a second polarization film and second inner and outer supporting films, at opposite sides of the second polarization film, the second inner supporting film adjacent to the second substrate, wherein a color shift from viewing the in-plane switching liquid crystal display device is minimized to a range of about 0.2-0.3 for “x” coordinate and 0.2-0.3 for “y” coordinate in the International Commission on Illumination (CIE) chromaticity diagram.