Determination of Gamut Boundary Description for multi-primary color displays

Abstract

Displays with a larger color gamut to represent the images of the small color gamut are emphasized in the display development trend recently. Resulting from the vigorous development of Light Emitting Diodes (LEDs), the solutions to enlarge the color gamut which is formed a polygon area by adding multiple primary colors are possible, easier and inexpensive considerably. Therefore, how to determine the Gamut Boundary Description (GBD) plays a significant role for the applications of the multiple primary color displays, where the primaries form a convex polygon in CIE xy space. The paper proposed a method to construct the three-dimension color volume of GBD from the two-dimension polygon gamut area precisely regardless of that how many multiple primary colors the displays have. The method is examined in detail by the simulations and experiments, and proved it to fulfill from tri-primary color device to Nprimary color device.

Determination of optimal converting point of color temperature conversion complied with ANSI C78 377 for indoor solid-state lighting and display applications

“…Hence, the proposed method determines the optimal converting point on the isotemperature line first meeting by the expanded color gamut from the reference white point. Huang [9] also proved that the color gamut area must expand along the lines of center of gravity of tri-primaries. The concept of line of center of gravity was from the Centre of Gravity Law of Color Mixture [16].…”

“…This paper defines that the optimal converting point has the maximal luminance among the color points on the isotemperature line and the worst point has the minimal luminance. According to the color mixing theory and the relationship between color gamut area and luminance [9], when the color gamut area expanded to bigger one, the luminance must be decreased. Hence, the proposed method determines the optimal converting point on the isotemperature line first meeting by the expanded color gamut from the reference white point.…”

“…For display application, consumers have different preferences to the CT. According to the color mixing theory and the relationship between color gamut area and luminance [9], when the reference white point is converted to the point of target CT, the luminance must be sacrificed. In the same color perception condition, less luminance loss means less power consumption for lighting and display.…”

Color Vision Improvement of Anomalous Trichromats Based on a Wide-Color-Gamut Display

“…Ou-Yang proposed a three-dimensional color volume boundary description of color displays, which can be precisely constructed from the two-dimensional polygon gamut area [23]. As the brightness increases, the color gamut area on the color coordinates shrinks, and the color gamut polygon area under different brightness is determined by the vertices.…”