Study of color conversion for display color appearance between three-primary colors and four-primary colors based on the matrix switching method

• Main Authors: Bo-sheng Huang, 黃伯昇
• Other Authors: Chia-Rong Sheu
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/05659345597417003090

碩士 === 國立成功大學 === 光電科學與工程研究所 === 97 === In this thesis, our major study is color conversion between three-primary and four-primary colors on the three-primary colors LCD by simulation. Matrix switching algorithm is the tool of color conversion processed in CIEXYZ color space. In order to confirm correctness of color conversion, we simulated and made comparisons of some color patterns on the LCD, which were spatial color mixing with the original three-primary colors and reconstructed four-primary colors, respectively. The pixel unit of four-primary colors was classical Bayer type, which sub-pixels were composed of original RGB stripe sub-pixels of LCD. We also used spectroradiometer to measure color characteristics of studied color patterns. From experimental results, they show that the measured color values, (x, y) of the same color pattern respectively rendered by three-primary and four-primary colors are very close, but a significantly large luminance difference exists between them. To enhance the luminance of four-primary color patterns, we multiplied a factor in the measured spatially four-primary color spectrum. The value of multiple factor was the average ratio of luminance between three-primary and four-primary in fourteen gray patterns. After luminance compensation, the four-primary color patterns are more consistent with the original three-primary color patterns.