White balance adjustment method for a display device

A white balance adjustment method for a display device, comprising:

• 1) acquiring RXq, RYq, RZq which are spectrum stimulus values of q gray scale of red of a display panel of a tested displayed device, GXq, GYq, GZq which are spectrum stimulus values of q gray scale of green of the display panel of the tested display device, BXq, BYq, BZq which are spectrum stimulus values of q gray scale of blue of the display panel of the tested display device, and WXq, WYq, WZq which are spectrum stimulus values of q gray scale of white of the display panel of the tested display device, wherein q is a gray level and is an integer, X, Y, Z are spectrum stimulus values of the display panel of the tested display device;
• 2) determining WYq which is spectrum stimulus value of q gray scale of white of the display panel of the tested display device as brightness of q gray scale of white;
• and determining GYq which is spectrum stimulus value of q gray scale of green of the display panel of the tested display device as brightness of q gray scale of green;
• 3) dividing WYq which is brightness of q gray scale of white of the display panel of the tested display device, into i segments between q gray scale and q−1 gray scale by using an interpolation method;
• and dividing GYq which is brightness of q gray scale of green of the display panel of the tested display device, into i segments between q gray scale and q−1 gray scale by using the interpolation method, wherein i is an integer that is not less than 2;
• 4) normalizing values from WY0 which is brightness of 0 gray scale to WYmax which is brightness of max gray scale, which have been divided, as WN0 to WNmax, on the basis of WYmax which is brightness of max gray scale of white of the display panel of the tested display device and WY0 which is brightness of 0 gray scale;
• and normalizing values from GY0 which is brightness of 0 gray scale to GYmax which is brightness of max gray scale, which have been divided, as GN0 to GNmax, on the basis of GYmax which is brightness of max gray scale of green of the display panel of the tested display device and GY0 which is brightness of 0 gray scale, wherein the max gray scale means the maximum gray scale;
• 5) acquiring WMq which is an ideal brightness normalized value of q gray scale of white of the display panel of the tested display device;
• and acquiring GMq which is an ideal brightness normalized value of q gray scale of green of the display panel of the tested display device;
• 6) comparing the ideal brightness normalized value WMq and each of the values from WY0 which is brightness of 0 gray scale to WYmax which is brightness of max gray scale, which have been divided, determining an optimal gray scale of white of the display panel of the tested display device, which corresponds to q gray scale, based on the closest principle;
• and comparing the ideal brightness normalized value GMq and each of the values from GY0 which is brightness of 0 gray scale to GYmax which is brightness of max gray scale, which have been divided, determining an optimal gray scale of green of the display panel of the tested display device, which corresponds to q gray scale, based on the closest principle;
• and
• 7) determining a target chromaticity, changing the gray scales of red and blue of the display panel of the tested display device, acquiring different RGBW combinations, measuring a chromaticities of the different RGBW combinations, and determining a RGBW combination which is closest to the target chromaticity based on the measured chromaticities of the different RGBW combinations.