Method for evaluating color filter, color filter and liquid crystal display device
US7948623B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 18, 2009 |
| Grant date | May 24, 2011 |
| Priority date | — |
| Expiry date | Sep 25, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133514
- WIPO fieldOptics
- WIPO sectorInstruments
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 ξ1 obtained from the equation (1):ξ1=∫abΔ(λ)·T(λ)dλ (1)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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.