등색함수 필터의 설계와 이를 이용한 LCD 평판 디스플레이의 색채 측정에 대한 오차 분석

Abstract

Filter colorimeters have a set of spectral bands for which spectral responsivity is the same as the color matching function defined by CIE (Commission Internationale de I'Eclairage). We have designed a set of color matching function filters denoted by ?? -filter, ?? -filter, and ?? -filter. Because the ?? - function has two transmission bands, two ?? -filters are designed to cover the ?? - function. To design the filters, we developed a nonlinear least square fit program which determines the thickness of the color glasses by minimizing its spectral mismatch value (ƒ1΄ ) to below 3 %. The design has been validated by fabrication of the ??-bar filter, of which ƒ1΄ was measured to be 2.8 %. Considering a LCD flat panel display as a device under test, we have calculated the systematic error of the colorimetric measurement using the designed filters.