Patent ID: 11929002
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A method of calculating a gamma value for a display panel having first to kth display areas, wherein the method calculates first to kth RGB gamma values, where k is an integer greater than or equal to 2, to be applied to the first to kth display areas, the method comprising:
displaying a first color test image having a first target gray level using two or more first color pixels included in a jth display area on the display panel, and then measuring a first average luminance value of a first light having only a first color emitted from the two or more first color pixels included in the jth display area, where j is an integer between 1 and k, by using a luminance measurement device;
displaying a second color test image having the first target gray level using two or more second color pixels included in the jth display area on the display panel, and then measuring a second average luminance value of a second light having only a second color different from the first color emitted from the two or more second color pixels included in the jth display area by using the luminance measurement device, wherein the displaying of the second color test image and the measuring of the second average luminance value is performed after the displaying of the first color test image and the measuring of the first average luminance value;
obtaining an estimated driving current flowing the second color pixel at the first target gray level from a second color gray level-driving current curve of RGB gray level-driving current curves,
wherein the RGB gray level-driving current curves include a first color gray level-driving current curve which maps a gray level of the first color pixel to an estimated driving current flowing the first color pixel, and the second color gray level-driving current curve which maps a gray level of the second color pixel to an estimated driving current flowing the second color pixel;
obtaining a second target gray level of the first color pixel at the estimated driving current of the second color pixel from the first color gray level-driving current curve of the RGB gray level-driving current curves; and
calculating a target gamma value to be applied to the first color pixel included in the jth display area based on the first target gray level, the second target gray level, the first average luminance value, and the second average luminance value.