Patent ID: 9715849
Date: 2017-07-25
CPC Classifications: G09G

Claim:
1. A data compensation circuit for compensating a voltage drop of a power voltage applied to a display panel of an organic light-emitting diode (OLED) display, the circuit comprising: an average current calculator configured to calculate an average current value of each of M×N pixel blocks, where M and N are positive integers, based at least in part on input image data, wherein each of the M×N pixel blocks includes a plurality of pixels, and wherein a plurality of target pixel blocks are selected among the pixel blocks; a voltage drop calculator configured to calculate one or more pixel block voltage drops of the power voltage of each of the selected target pixel blocks based at least in part on an X-axis voltage drop and a Y-axis voltage drop of each of the target pixel blocks, wherein voltage drop calculator is further configured to calculate the X-axis and Y-axis voltage drops based at least in part on the product of a Y-axis voltage drop weighted value and an X-axis voltage drop distribution coefficient; an interpolator configured to interpolate the pixel block voltage drops of adjacent target pixel blocks so as to calculate a pixel voltage drop of a target pixel selected among one of the target pixel blocks; and a compensated data generator configured to compensate a data voltage of the input image data based at least in part on the pixel voltage drop so as generate a compensated data voltage.