Method for evaluating color filter, color filter and liquid...

Details Method for evaluating color filter, color filter and liquid... Method for evaluating color filter, color filter and liquid...

2011-05-24

2011-05-24

Lauchman, L. G (Department: 2877)

Optics: measuring and testing

By polarized light examination

With birefringent element

C349S096000, C349S061000

Reexamination Certificate

active

07948623

ABSTRACT:
A method of evaluating a color filter including a substrate, and at least three color pixels disposed thereon, the method includes determining an oblique visibility of a liquid crystal display device equipped with the color filter on the basis of value ξ1obtained from the equation (1):in-line-formulae description="In-line Formulae" end="lead"?ξ1=∫abΔ(λ)·T(λ)dλ  (1)in-line-formulae description="In-line Formulae" end="tail"?wherein “a” and “b” are values respectively representing a wavelength range of a continuous wavelength light and satisfying conditions of 380≦a, b≦780 and a<b; Δ(λ) represents an optical retardation obtained by irradiating each of color pixels with a continuous wavelength light containing light components with wavelength λ falling within a range of 380 nm to 780 nm at an incident angle, and subjecting the transmitted light to measurement using a spectroscopic ellipsometer, and T(λ) represents a spectral transmittance of the color pixels measured at the wavelength λ falling within a range of 380 nm-780 nm.

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English Translation of the International Preliminary Report on Patentability mailed Jul. 2, 2009 in corresponding International Patent Application PCT/JP2007/074227.
Japanese Office Action issued Mar. 22, 2011 in corresponding Japanese Patent Application 2006-341842.

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