LED显示屏白场显示品质成为行业内日益关注的焦点, 白场显示品质主要表现为白场的亮度和色度, 而显示屏的基色亮度是影响白场亮度和色度的重要因素之一。为了得到基色亮度与白场亮色度的数学关系, 量化基色亮度变化引起白场亮色度的偏差, 本文在CIE-Yxy颜色空间中建立三基色亮度与白场亮色度的映射模型, 得到红基色、绿基色、蓝基色各自亮度变化以及混合变化引起的白场亮色度偏差的空间模型, 并在空间模型的正投影平面上着重分析了三基色亮度对变化白场的色度影响。该关系式在CIE-Yxy颜色空间中具有通用性, 可以快速确定任意LED显示屏基色亮度变化引起的白场亮色度偏差。

The white filed display quality of LED panel is increasingly focused. The white field display quality is mainly the luminance and chromaticity, and the primary luminance of the LED panel is one of the important factors affecting the luminance and chromaticity of the white field. In order to obtain the mathematical relationship between primary luminance and brightness and chromaticity of white field, quantificat the deviation of luminance and chromaticity of the white field caused by primary luminance deviation, according to establish the mapping model of the three primary luminance and the luminance and chromaticity of the white field in the CIE-Yxy color space, this paper obtains the spatial model of deviation of the luminance and chromaticity of the white field deviation caused by the brightness variation of red, green and blue primary individually or compounded. The influence on luminance and chromaticity of the white field by the primaries variation has been analyzed in the orthographic plane of the color space model. The mathematical relationship has a general form in CIE-Yxy color space, and can quickly determine the deviation of luminance and chromaticity of white field caused by the variation of primary luminance of any LED panel.