Optical laminate film, and polarizer and liquid crystal display device using the film
AssigneeFUJIFILM Corporation
InventorsJun TAKEDA, Masato NAKAO
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Abstract
An optical laminate film that comprises a layer B satisfying 1.0≦Nz≦3.0, 70 nm≦Re(550) and 0 nm≦Rth(550)≦200 nm, and a layer C satisfying Re(550)≦10 nm and −200 nm≦Rth(550)≦−50 nm, wherein the layer B and the layer C are adjacent to each other, the absolute value of the difference in SP between the main ingredient of the layer B and the main ingredient of the layer C is from 2.6 to 10.0, contribute toward improving the viewing angle characteristics of horizontal alignment mode liquid crystal display devices without causing problems of front contrast ratio reduction and display unevenness.
Claims10
An optical laminate film that comprises a layer B satisfying the following three formulae (Ib) to (IIIb):
- 1.0≦Nz≦3.0 (Ib):
- 70 nm≦Re(550) (IIb):
- 0 nm≦Rth(550)≦200 nm, (IIIb):
- and a layer C satisfying the following two formulae (Ic) and (IIc):
- Re(550)≦10 nm (Ic):
- −200 nm≦Rth(550)≦−50 nm, (IIc):
- wherein the layer B and the layer C are adjacent to each other, the absolute value of the difference in SP, as calculated on the basis of the Hoy method, between the main ingredient of the layer B and the main ingredient of the layer C, |ΔSP| is from 2.6 to 10.0.
A polarizer comprising a polarizing element and a optical laminate film, wherein the optical laminate film comprises a layer B satisfying the following three formulae (Ib) to (IIIb):
- 1.0≦Nz≦3.0 (Ib):
- 70 nm≦Re(550) (IIb):
- 0 nm≦Rth(550)≦200 nm, (IIIb):
- and a layer C satisfying the following two formulae (Ic) and (IIc):
- Re(550)≦10 nm (Ic):
- −200 nm≦Rth(550)≦−50 nm, (IIc):
- wherein the layer B and the layer C are adjacent to each other, the absolute value of the difference in SP, as calculated on the basis of the Hoy method, between the main ingredient of the layer B and the main ingredient of the layer C, |ΔSP| is from 2.6 to 10.0.
A horizontal alignment mode liquid crystal display device having a optical laminate film comprising a layer B satisfying the following three formulae (Ib) to (IIIb):
- 1.0≦Nz≦3.0 (Ib):
- 70 nm≦Re(550) (IIb):
- 0 nm≦Rth(550)≦200 nm, (IIIb):
- and a layer C satisfying the following two formulae (Ic) and (IIc):
- Re(550)≦10 nm (Ic):
- −200 nm≦Rth(550)≦−50 nm, (IIc):
- wherein the layer B and the layer C are adjacent to each other, the absolute value of the difference in SP, as calculated on the basis of the Hoy method, between the main ingredient of the layer B and the main ingredient of the layer C, |ΔSP| is from 2.6 to 10.0.
Dependencies are inferred from the claim text.