Method for generating data for driving a display panel, data driving circuit for performing the same and display device having the data driving circuit

摘要

A method for generating data for driving a display panel is provided in which first compensation data of (N+k) bits, corresponding to grayscale data of N bits, is generated, wherein values of N and k are natural numbers. A first gamma curve is applied to the first compensation data of (N+k) bits. Second compensation data of (N+k) bits, corresponding to the grayscale data of N bits, is generated. A second gamma curve is applied to the second compensation data of (N+k) bits. The first compensation data or the second compensation data are selectively output and converted into analog data signals. The analog data signals are output to a data line. Accordingly, the first compensation data and second compensation data includes a multidomain structure which improves display quality. A data driving circuit and a display device including the data driving circuit for performing the method are also provided.

主权项

1. A data driving circuit comprising:
a first compensating section which receives a first gamma curve and generates first compensation data of (N+k) bits corresponding to received current grayscale data of N bits, wherein values of N and k are natural numbers, the current grayscale data comprising current red grayscale data, current green grayscale data and current blue grayscale data; a second compensating section which receives a second gamma curve different from the first gamma curve and generates second compensation data of (N+k) bits corresponding to the current grayscale data of N bits; and a digital-to-analog converter (“DAC”) outputting the first compensation data and second compensation data as analog data signals, wherein the first compensating section comprises:
a first storage section which stores a first red lookup table comprising first red sample compensation data corresponding to first sample red grayscale data of m bits sampled from the current red grayscale data of N bits, wherein a value of m is a natural number and smaller than N, a first green lookup table comprising first sample green compensation data corresponding to first sample green grayscale data of m bits sampled from the current green grayscale data of N bits, and a first blue lookup table comprising first sample blue compensation data corresponding to first sample blue grayscale data of m bits sampled from the current blue grayscale data of N bits, wherein the second compensating section comprises: a second storage section which stores a second red lookup table comprising second sample red compensation data corresponding to second sample red grayscale data of m bits sampled from the current red grayscale data of N bits, a second green lookup table comprising second sample green compensation data corresponding to second sample green grayscale data of m bits sampled from the current green grayscale data of N bits, and a second blue lookup table comprising second sample blue compensation data corresponding to second sample blue grayscale data of m bits sampled from the current blue grayscale data of N bits.