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Color management of liquid crystal display placed under light environment

2003; Wiley; Volume: 86; Issue: 7 Linguagem: Inglês

10.1002/ecjc.10074

1520-6440

Yasuhiro Yoshida, Yoichi Yamamoto,

Color Science and Applications

Abstract We studied the color management of liquid crystal displays (LCDs) placed in a light environment. In this paper, we first explained LCD problems related to color management and proposed an appropriate color management system when using an LCD. We also applied this system and examined the color management of an LCD placed in a light environment. Based on the proposed method, we showed that favorable color reproduction properties are obtained for LCDs in a light environment as well as a dark room. We reevaluated the LCD from the perspective of compatibility with the ICC profile. LCDs have superior γ and brightness characteristics, but have the problem of the chromaticity coordinates of reference white and the primary colors changing in response to the input signal value. This indicated a problem related to the contrast ratio of the LCD and showed that the changes in the chromaticity coordinates of the primary colors can be adequately described if the leakage light is considered. Based on this, we proposed a suitable device profile and color management system for LCDs and demonstrated excellent color reproduction in a dark room. Next, we examined the LCD placed in a light environment. We showed that if the LCD is designed so that the surface reflected light produced in a light environment is handled in the same manner as leakage light and suitable surface reflected light is produced, fluctuations in the chromaticity coordinates of reference white could be avoided. We placed a prototype of this type of LCD in an actual light environment and applied and evaluated the proposed color management system. This result showed that a low color reproduction error could be maintained even when a dark image was displayed on an LCD placed in a light environment and confirmed a subjective improvement in the image quality. © 2003 Wiley Periodicals, Inc. Electron Comm Jpn Pt 3, 86(7): 1–14, 2003; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/ecjc.10074