LED显示屏亮色度分离采集混合校正方法

摘要

本发明涉及一种LED显示屏亮色度分离采集混合校正方法，该方法包括下述步骤：检测LED显示屏各模块内任一像素的色度参数作为该像素所在的模块的色度坐标；对显示屏上各个显示像素进行亮度采集，得到各个显示像素的亮度参数；确定显示屏各基色基准色度坐标和各个基色的基准亮度；确定任意像素的色度空间；确定各个显示像素的色度空间变换参数矩阵；利用各个显示像素的色度空间变换参数矩阵得到各像素的实时驱动显示数据；利用实时驱动显示数据驱动显示屏。本发明能够有效解决LED显示屏的色度均匀性校正方面存在的问题，并且色度参数采集效率高。

主权项

1.一种LED显示屏亮色度分离采集混合校正方法，其特征在于包括下述步骤：一、设定显示模块内的各像素色度参数都相等，则对于其中m_n模块的i_j像素，有：$\left\{\begin{array}{c}{x}_{r\_[m,n][i,j]}=x_{r\_[m,n]}\\ y_{r\_[m,n][i,j]}=y_{r\_[m,n]}\\ x_{g\_[m,n][i,j]}=x_{g\_[m,n]}\\ y_{g\_[m,n][i,j]}=y_{g\_[m,n]}\\ x_{b\_[m,n][i,j]}=x_{b\_[m,n]}\\ y_{b\_[m,n][i,j]}=y_{b\_[m,n]}\end{array}\right.---\left(14\right)$其中m、n分别为像素所在的显示模块的行序数和列序数，i、j分别为显示模块内像素所在的行序数和列序数；利用亮色度检测仪获得LED显示屏M×N个模块内任一像素的色度参数x_{r_[m，n][i，j]}、y_{r_[m，n][i，j]}、x_{g_[m，n][i，j]}、y_{g_[m，n][i，j]}、x_{b_[m，n][i，j]}、y_{b_[m，n][i，j]}作为m_n模块的色度坐标x_{r_[m，n]}、y_{r_[m，n]}、x_{g_[m，n]}、y_{g_[m，][i，j]}、x_{b_[m，n]}、y_{b_[m，n]}；对显示屏上各个显示像素进行亮度采集；得到各个显示像素的亮度参数[B_{r_[m，n][i，j]}、B_{g_[m，n][i，j]}、B_{b_[m，n][i，j]}]；二、确定显示屏上所有显示像素的色度坐标围成的最小色度三角形覆盖范围，该最小色度三角形的各个顶点的色度坐标[x_{r_min}、y_{r_min}、x_{g_min}、y_{g_min}、x_{b_min}、y_{b_min}]即为整个显示屏各基色基准色度坐标；确定各个基色的基准亮度[B_{r_min}、B_{g_min}、B_{b_min}]，即基准色度空间的基色空间内切最小亮度数值；则LED平板显示屏基准色度空间可以表示为：$\left[\begin{array}{c}{X}_{\min }\\ Y_{\min }\\ Z_{\min }\end{array}\right]=\left[\begin{array}{ccc}{C}_{r\_\min }{x}_{r\_\min }& C_{g\_\min }{x}_{g\_\min }& C_{b\_\min }{x}_{b\_\min }\\ C_{r\_\min }{y}_{r\_\min }& C_{g\_\min }{y}_{g\_\min }& C_{b\_\min }{y}_{b\_\min }\\ C_{r\_\min }{z}_{r\_\min }& C_{g\_\min }{z}_{g\_\min }& C_{b\_\min }{z}_{b\_\min }\end{array}\right]\left[\begin{array}{c}R\\ G\\ B\end{array}\right]---\left(15\right)$其中Z_{r_min}＝1-x_{r_min}-y_{r_min}；Z_{g_min}＝1-x_{g_min}-y_{g_min}；Z_{b_min}＝1-x_{b_min}-y_{b_min}；R、G、B为红、绿、蓝输入显示数据；$\left[\begin{array}{c}{C}_{r\_\min }\\ C_{g\_\min }\\ C_{b\_\min }\end{array}\right]=\left[\begin{array}{c}{B}_{r\_\min }/y_{r\_\min }\\ B_{g\_\min }/y_{g\_\min }\\ B_{b\_\min }/y_{b\_\min }\end{array}\right]---\left(16\right)$三、对于m_n模块的i_j像素，它的色度空间为：$\left[\begin{array}{c}{X}_{[m,n][i,j]}\\ Y_{[m,n][i,j]}\\ Z_{[m,n][i,j]}\end{array}\right]=\left[\begin{array}{ccc}{C}_{r\_[m,n][i,j]}{x}_{r\_[m,n]}& C_{g\_[m,n][i,j]}{x}_{g\_[m,n]}& C_{b\_[m,n][i,j]}{x}_{b\_[m,n]}\\ C_{r\_[m,n][i,j]}{y}_{r\_[m,n]}& C_{g\_[m,n][i,j]}{y}_{g\_[m,n]}& C_{b\_[m,n][i,j]}{y}_{b\_[m,n]}\\ C_{r\_[m,n][i,j]}{z}_{r\_[m,n]}& C_{g\_[m,n][i,j]}{z}_{g\_[m,n]}& C_{b\_[m,n][i,j]}{z}_{b\_[m,n]}\end{array}\right]\left[\begin{array}{c}R\\ G\\ B\end{array}\right]---\left(17\right)$其中Z_{r_[m，n]}＝1-x_{r_[m，n]}-y_{r_[m，n]}；Z_{g_[m，n]}＝1-x_{g_[m，n]}-y_{g_[m，n]}；Z_{b_[m，n]}＝1-x_{b_[m，n]}-y_{b_[m，n]}；$\left[\begin{array}{c}{C}_{r\_[m,n][i,j]}\\ C_{g\_[m,n][i,j]}\\ C_{b\_[m,n][i,j]}\end{array}\right]=\left[\begin{array}{c}{B}_{r\_[m,n][i,j]}/y_{r\_[m,n]}\\ B_{g\_[m,n][i,j]}/y_{g\_[m,n]}\\ B_{b\_[m,n][i,j]}/y_{b\_[m,n]}\end{array}\right]---\left(18\right)$式(17)采用驱动显示数据[R_{[m，n][i，j]}G_{[m，n][i，j]}B_{[m，n][i，j]}]就表示为：$\left[\begin{array}{c}{X}_{[m,n][i,j]}\\ Y_{[m,n][i,j]}\\ Z_{[m,n][i,j]}\end{array}\right]\left[\begin{array}{ccc}{C}_{r\_[m,n][i,j]}{x}_{r\_[m,n]}& C_{g\_[m,n][i,j]}{x}_{g\_[m,n]}& C_{b\_[m,n][i,j]}{x}_{b\_[m,n]}\\ C_{r\_[m,n][i,j]}{y}_{r\_[m,n]}& C_{g\_[m,n][i,j]}{y}_{g\_[m,n]}& C_{b\_[m,n][i,j]}{y}_{b\_[m,n]}\\ C_{r\_[m,n][i,j]}{z}_{r\_[m,n]}& C_{g\_[m,n][i,j]}{z}_{g\_[m,n]}& C_{b\_[m,n][i,j]}{z}_{b\_[m,n]}\end{array}\right]\left[\begin{array}{c}{R}_{[m,n][i,j]}\\ G_{[m,n][i,j]}\\ B_{[m,n][i,j]}\end{array}\right]---\left(19\right)$四、以公式(15)作为色度空间变换的标准，确定各个显示像素的色度空间变换参数矩阵：$T_{[m,n][i,j]\_\min }=\left[\begin{array}{ccc}{C_{[m,n][i,j]\_\min }}^{\mathrm{rr}}& {C_{[m,n][i,j]\_\min }}^{\mathrm{rg}}& {C_{[m,n][i,j]\_\min }}^{\mathrm{rb}}\\ {C_{[m,n][i,j]\_\min }}^{\mathrm{gr}}& {C_{[m,n][i,j]\_\min }}^{\mathrm{gg}}& {C_{[m,n][i,j]\_\min }}^{\mathrm{gb}}\\ {C_{[m,n][i,j]\_\min }}^{\mathrm{br}}& {C_{[m,n][i,j]\_\min }}^{\mathrm{bg}}& {C_{[m,n][i,j]\_\min }}^{\mathrm{bb}}\end{array}\right]---\left(20\right)$五、将步骤四中的各个显示像素的色度空间变换参数矩阵的各项元素代入式(21)，得到各像素的实时驱动显示数据R_{[m，n][i，j]}、G_{[m，n][i，j]}、B_{[m，n][i，j]}；$\left[\begin{array}{c}{R}_{[m.n][i,j]}\\ G_{[m,n][i,j]}\\ B_{[m,n][i,j]}\end{array}\right]T_{[m,n][i,j]\_\min }\left[\begin{array}{c}R\\ G\\ B\end{array}\right]=\left[\begin{array}{ccc}{C_{[m,n][i,j]\_\min }}^{\mathrm{rr}}& {C_{[m,n][i,j]\_\min }}^{\mathrm{rg}}& {C_{[m,n][i,j]\_\min }}^{\mathrm{rb}}\\ {C_{[m,n][i,j]\_\min }}^{\mathrm{gr}}& {C_{[m,n][i,j]\_\min }}^{\mathrm{gg}}& {C_{[m,n][i,j]\_\min }}^{\mathrm{gb}}\\ {C_{[m,n][i,j]\_\min }}^{\mathrm{br}}& {C_{[m,n][i,j]\_\min }}^{\mathrm{bg}}& {C_{[m,n][i,j]\_\min }}^{\mathrm{bb}}\end{array}\right]\left[\begin{array}{c}R\\ G\\ B\end{array}\right]---\left(21\right)$六、采用步骤五计算得到的实时驱动显示数据[R_{[m，n][i，j]}、G_{[m，n][i，j]}、B_{[m，n][i，j]}]驱动显示屏。