Sughrue Mion, PLLC
System for measuring modulation transfer function and method for evaluating image quality of color liquid crystal displays using the system
A method for evaluating the image quality of a color liquid crystal display (LCD), and a system for measuring the modulation transfer function (MTF) for use in the evaluation of the image quality. The image quality evaluation method involves measuring the MTF at a predetermined position on the screen of an LCD, and the image quality is evaluated using the measured MTF. The MTF measuring system, which includes a linear charge coupled device (CCD) camera equipped with a V(&lgr;) filter, is able to accurately measure the image quality of a color LCD by setting the measuring conditions through computer simulation. In addition, the resolution and signal-to-noise characteristics of an image displayed on the screen can be evaluated based on the measured MTF. Also, the problem of truncation of the line spread function (LSF) can be solved by fixing the scanning width. The spectral response characteristics of detectors can be made like those of the human eye using the V(&lgr;) filter. The MTF measurement can be effectively used in evaluating the image quality of color CRTs.
Samsung Electronics Co., Ltd.
H G
H04N G02F
inventional additional
Yun-woo Tae-hee
Lee Kim