Evaluation of color CRT monitor by MTFA

MTFA에 의한 칼라 CRT의 화질 평가

  • Published : 1998.06.01

Abstract

The MTF(modulation transfer function) measuring system with a linear CCD(charge coupled-device) was constructed to cvaluate a color CRT(catode ray tube). The measured MTF values were corrected by considering the spectral response and the pixel sizes of CCD. The effects of a spot size, video bandwidth, pitch of shadow mask holes, display luminance, and ambient illumination on image quality were studied. The uniformity of resolution and the contrast Ioss by ambient light of the color CRT monitor were measured, and the results were analyzed by MTFA(modulation threshold area).

칼라 CRT(cathode ray tube)의 화질을 평가하기 위하여 일차원 CCD(charge coupled-device)를 사용한 MTF(modulation transfer function)측정장치를 구성하였다. CCD의 분광감도와 화소의 크기와 간격을 고려하여 MTF 측정값을 보정하였다. Spot 크기, 비디오 대역폭, 새도우 마스크, 디스플레이 휘도, 그리고 주변 조명이 디스플레이의 미치는 영향에 대하여 연구하였다. 칼라 CRT 모니터에서 화면의 균일성과 주변 조명에 따른 화질 평가하였으며, 그 결과를 MTFA(modulation transfer function area)를 사용하여 나타내었다.

Keywords

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