LCDの画素密度と表示文字の読取りやすさとの関係

概要

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We investigated the effects of pixel density, character matrix size, and character size on the subjective legibility of liquid-crystal displays (LCDs). At a 30cm viewing distance, 50 subjects assessed the legibility under 33 different display conditions, we used 6 × 4.5 photographs to simulate the LCDs. We found that the character matrix for Japanese characters should be more than 10 × 10pixels when the characters are smaller than 2.7mm. For characters 2.7 to 3.5mm, the character matrixes should be 15 × 15 to 17 × 17 for single-stroke characters, and 22 × 21 to 27 × 27 for double-stroke characters. These results show that the preferred character matrix depends on pixel density, character size, and stroke width. The preferred stroke width for Japanese characters is 200 to 300 μm. From the legibility point of view, the pixel density of displays should be increased to 250 or SOOpixels per inch.
社団法人映像情報メディア学会の論文
2002-08-01