Patent ID: 11961493
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 14:
15. The display device of claim 1, wherein the current control circuit includes:
a gray-luminance converter configured to convert gray levels represented by pixel data included in the first through N-th line data for the first through the N-th pixel rows into pixel luminances for each of the first through the N-th pixel rows;
a line luminance calculator configured to calculate a line luminance for each of the first through the N-th pixel rows by summing the pixel luminances for each of the first through the N-th pixel rows;
an average luminance level determiner configured to store line luminances for the first through the N-th pixel rows in a first-in first-out (FIFO) manner, and to determine an average panel luminance level based on the line luminances for the first through the N-th pixel rows;
a luminance domain scale factor determiner configured to determine a luminance domain scale factor corresponding to the average panel luminance level;
a scaled panel luminance calculator configured to multiply the line luminances for the first through the N-th pixel rows by luminance domain scale factors for the first through the N-th pixel rows, respectively, and to calculate a scaled panel luminance by summing results of the multiplication;
an overcurrent protector configured to compare the scaled panel luminance with a panel luminance limit value, and to decrease the luminance domain scale factor output from the luminance domain scale factor determiner when the scaled panel luminance exceeds the panel luminance limit value; and
a gray domain scale factor determiner configured to convert the luminance domain scale factor output from the overcurrent protector into a gray domain scale factor as the current control value.