Claims
- 1. A color liquid crystal display device comprising:a color filter having a thickness of from 1 to 2.5 μm, and comprising at least one red filter segment, at least one green filter segment, and at least one blue filter segment, said at least one blue filter segment being prepared from a blue-colored composition comprising a colorant carrier selected from the group consisting of a transparent resin, a precursor of a transparent resin and a mixture thereof and a blue colorant dispersed in said colorant carrier and consisting of a copper phthalocyanine pigment and a dioxazine violet pigment wherein a content of said dioxazine violet pigment is from 0.5% to 7% by weight based on the total weight of said blue colorant; and a backlight unit having a three-band fluorescent lamp as a light source; wherein a distribution I(λ) of light intensity of backlight emitted from said backlight unit relative to wavelength satisfies the following conditions: 0.35≦α≦0.5 where α is: α=∑λ=400700I(λ)·z_(λ)/∑λ=400700I(λ)·{x_(λ)+y_(λ)+z_(λ)}wherein λ is wavelength; and {overscore (x)}(λ), {overscore (y)}(λ), and {overscore (z)}(λ) are color matching functions of the XYZ color specification system.
- 2. The device according to claim 1, wherein said dioxazine violet pigment is C.I. Pigment Violet 23.
- 3. The device according to claim 1, wherein not less than 80% by weight of said copper phthalocyanine pigment is constituted by C.I. Pigment Blue 15:6.
- 4. The device according to claim 1, which has a thickness of from 1 to 2 μm.
- 5. The device according to claim 1, wherein the content of said dioxazine violet pigment is from 3% to 7% by weight based on the total weight of said blue colorant.
- 6. The device according to claim 1, wherein said blue color filter segment contains a transparent resinous binder provided by said colorant carrier, and from 10% to 40% by weight of said blue colorant.
- 7. The device according to claim 1, wherein said fluorescent lamp is provided with a phosphor layer containing 20 to 55% by weight of at least one blue-emitting phosphor selected from the group consisting of Sr5(PO4)3Cl:Eu, (SrCaBa)5(PO4)3Cl:Eu, and BaMg2Al16O27:Eu, 20 to 55% by weight of at least one green-emitting phosphor selected from the group consisting of LaPO4:Ce, Tb, and (CeTb)MgAl14O19, and 20 to 45% by weight of red-emitting phosphor formed of Y2O3:Eu.
Priority Claims (1)
Number |
Date |
Country |
Kind |
11-240802 |
Aug 1999 |
JP |
|
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 11-240802, filed Aug. 27, 1999, the entire contents of which are incorporated herein by reference.
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