LCD Legibility as a Function of Resolution

Takashi NOSE  Naoyasu IKEDA  Hiroshi KANOH  Hidenori IKENO  Hiroshi HAYAMA  Setsuo KANEKO  

IEICE TRANSACTIONS on Electronics   Vol.E82-C   No.10   pp.1792-1797
Publication Date: 1999/10/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Electronic Displays)
TFT-LCD,  high resolution,  legibility,  subjective psychological experiments,  

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We proposed a new method to evaluate display legibility as a function of resolution. This method was able to evaluated display legibility without being restricted to the display resolution. Using this method, subjective psychological experiments were carried out to investigate display resolution, which provides legibility, in observing small characters. Samples viewed by subjects were images displayed on a high-resolution TFT-LCD that we developed, CRT images and printed documents for comparison. We have found that TFT-LCD legibility was much better than that of CRT, and that minimum resolution of about 175 dpi was needed for use in legible document viewers.