彩色显示器呈色域的确定是彩色管理系统中实现颜色空间转换的前提。不考虑亮度因素Ｙ而仅把在ＣＩＥ１９３１色度图上连接Ｒ、Ｇ、Ｂ三原色点形成的三角形区域认为是彩色显示器的呈色域，尚不能全面地描述显示器的呈色域。如果考虑亮度因素Ｙ，那么，在不同的呈色亮度下，其呈色域的形状与大小是不同的。本文就彩色显示器在不同呈色亮度下呈色域的确定问题进行实验研究，得出相应结论 Color display color gamut determination is the color management system to achieve the premise of color space conversion. Regardless of the brightness factor Y, only the triangular region formed by connecting R, G, and B primary color points on the CIE 1931 chromaticity diagram is considered as the color gamut of the color display, and the color gamut of the display can not be fully described. If you consider the brightness factor Y, then, in different color brightness, its color gamut shape and size are different. In this paper, color display at different color brightness of the color gamut to determine the issue of experimental study, draw the corresponding conclusion