Liquid crystal display module and liquid crystal display comprising the same
A liquid crystal display module includes first and second polarizing plates, and a liquid crystal panel between the polarizing plates. The second polarizing plate comprises an optical film on a polarizer. The optical film comprises a high refractive index pattern layer having at least one engraved pattern, and a low refractive index pattern layer having a filling pattern that fills at least a portion of the engraved pattern. The high refractive index pattern layer has a higher refractive index than the low refractive index pattern layer. The optical film is disposed such that light emitted from the liquid crystal panel will enter the low refractive index pattern layer and then be emitted through the high refractive index pattern layer. A liquid crystal display includes the liquid crystal display module.
1. A liquid crystal display module comprising:
a first polarizing plate;
a second polarizing plate comprising:
a polarizer, and
an optical film on the polarizer, the optical film comprising:
a high refractive index pattern resin layer having at least one engraved pattern having an aspect ratio of about 0.7 to about 1.0, and
a low refractive index pattern resin layer having a filling pattern completely filling the at least one engraved pattern,
wherein:
the high refractive index pattern resin layer has a higher refractive index than the low refractive index pattern resin layer; and
a liquid crystal panel between the first polarizing plate and the second polarizing plate, wherein the optical film is disposed such that light emitted from the liquid crystal panel will enter the low refractive index pattern resin layer and then be emitted through the high refractive index pattern resin layer,
wherein in the second polarizing plate, the polarizer, the low refractive index pattern resin layer and the high refractive index pattern resin layer are in this order from the liquid crystal panel.
2. The liquid crystal display module according to claim 1 , wherein the liquid crystal panel is a patterned vertical alignment (PVA) mode panel.
3. The liquid crystal display module according to claim 1 , wherein the at least one engraved pattern comprises a lenticular lens pattern, a prism pattern having a triangular to decagonal cross-section, or a prism pattern having a triangular to decagonal cross-section and a curved surface at a top portion thereof.
4. The liquid crystal display module according to claim 1 , wherein the high refractive index pattern resin layer has a ratio (P3/C) of a maximum pitch (P3) of the engraved pattern to a cycle (C) of about 0.5 or lower.
5. The liquid crystal display module according to claim 1 , wherein the at least one engraved pattern comprises a plurality of engraved patterns, and the high refractive index pattern resin layer further comprises a flat portion between the plurality of engraved patterns.
6. The liquid crystal display module according to claim 1 , wherein the low refractive index pattern resin layer has a refractive index of lower than about 1.50.
7. The liquid crystal display module according to claim 1 , wherein the high refractive index pattern resin layer has a refractive index of about 1.50 or greater.
8. The liquid crystal display module according to claim 1 , wherein the second polarizing plate further comprises a second protective layer, and the polarizer, the low refractive index pattern resin layer, the high refractive index pattern resin layer, the second protective layer and a functional layer are sequentially formed in this order.
9. The liquid crystal display module according to claim 1 , wherein the second polarizing plate further comprises a second protective layer, and the polarizer, the second protective layer, the low refractive index pattern resin layer, and the high refractive index pattern resin layer are sequentially layered in this order, the low refractive index pattern resin layer contacting the second protective layer, and the high refractive index pattern resin layer being directly layered on the low refractive index pattern layer.
10. The liquid crystal display module according to claim 9 , wherein the second protective layer is formed of at least one resin selected from the group consisting of polyethyleneterephthalate, triacetylcellulose, acrylic, and cyclic olefin polymer resins.
11. The liquid crystal display module according to claim 9 , wherein the second protective layer is formed of at least one resin selected from the group consisting of polyethyleneterephthalate, triacetylcellulose, acrylic, and cyclic olefin polymer resins.
12. The liquid crystal display module according to claim 1 , further comprising:
a composite optical sheet configured to emit light at an exit angle of about −40° to about +40°.
13. The liquid crystal display module according to claim 1 , wherein at least one of the high refractive index pattern resin layer and the low refractive index pattern resin layer further comprises a light diffusing agent.
14. The liquid crystal display module according to claim 13 , wherein the light diffusing agent is present in an amount of about 0.1 wt % to about 20 wt % in the high refractive index pattern resin layer, the low refractive index pattern resin layer, or the total of the high refractive index pattern resin layer and the low refractive index pattern resin layer.
15. A liquid crystal display comprising the liquid crystal display module according to claim 1 .