Patent ID: 9741281
Date: 2017-08-22
CPC Classifications: G09G

Claim:
1. A data voltage compensator for a display panel including a plurality of pixels, the coupling compensator comprising: a memory configured to receive a plurality of grayscale data that are digital signals and store the grayscale data; a first data converter configured to i) convert the grayscale data respectively to a plurality of grayscale data voltages that are analog signals including first and second grayscale data voltages based on a first look-up table (LUT) including a relationship between the grayscale data and the plurality of grayscale data voltages and ii) output the plurality of grayscale data voltages; a coupling voltage calculator configured to receive the grayscale data voltages and calculate a line coupling voltage, which is defined as a voltage on a parasitic capacitor formed between a selected one of the pixels and a corresponding data line, based on the difference between the first grayscale data voltage corresponding to the grayscale data provided to a first pixel of the pixels in an (N−1)th row and the second grayscale data voltage corresponding to the grayscale data provided to a second pixel of the pixels in an Nth row, where the N is an integer equal to or greater than 2; a compensating data generator configured to generate a plurality of compensating data voltages, which include a sum of the line coupling voltage and the corresponding one of the plurality of grayscale data voltages, configured to compensate the line coupling voltage; and a second data converter configured to i) convert the plurality of compensating data voltages respectively to a plurality of compensating grayscale data based on a second LUT including a relationship between the plurality of compensating data voltage and the compensating grayscale data and ii) output the compensating grayscale data to a data driver of the display panel.