Color error from an RGB‐stripe pixel structure |
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Authors: | Masaru Kanazawa Koichi Hamada Fumio Okano |
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Abstract: | Abstract— Most direct‐view color displays have a sub‐pixel structure similar to the RGB‐stripe structure. The video data for R and B are produced on the condition that they are reproduced at the same position as G but they are displayed on the screen with 1/3 of a pixel separation from the corresponding G pixel. This pixel structure thus entails a convergence error of 1/3 of a pixel. The modified s‐CIELAB method was applied to investigate color errors produced by the RGB‐stripe pixel structure. The results show that the pixel structure can degrade the image quality even for a viewing distance where the pixel structure is not visible because the color difference caused by the structure has a low‐frequency component and the human vision can detect it. The same method was applied to the convergence error and it was shown that the necessary convergence accuracy is around 1/4 of a pixel. |
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Keywords: | Modified s‐CIELAB psychophysics pixel structure color error convergence error |
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