Jpn. J. Appl. Phys. 38 (1999) pp. L646-L648  |Next Article|  |Table of Contents|
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Target Response Times of Liquid Crystal Displays Estimated by Analyzing the Front and Rear Part Gray Levels of Moving Square Patterns

Guo-Ping Chen, Masahiko Yamaguti, Naoki Ito, Takayuki Aoki¹ and Atsuo Fukuda¹

(Received February 19, 1999; accepted for publication April 21, 1999)

The slow response of nematic materials causes the blurring of moving pictures on commercial liquid crystal displays (LCDs). We have estimated the critical response time τ₉₀ necessary for apparently eliminating the blurring as a function of the gray level difference ΔG. The estimation is based on the observation that a running square pattern is hardly perceived when it differs from the background only by one in the 256 gray scale. For example, τ₉₀ is 300 µs for ΔG=255 and 10 ms for ΔG=3, which can be attained by using advanced smectic materials with ferro- and/or antiferroelectricity. Comments are given on another cause of blurring due to the characteristic feature of hold-type displaying in LCDs.

URL: http://jjap.jsap.jp/link?JJAP/38/L646/
DOI: 10.1143/JJAP.38.L646

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