Patent ID: 7580021

Claim:
A display driver, comprising: gamma correction circuits for first to p-th color components provided for first to p-th (p is an integer equal to or more than two) color components, a gamma correction circuit for an i-th (1≦i≦p, i is an integer) color component converting ki bits (k1to kp are integers) gray-scale data to converted gray-scale data of j (j >ki, j is an integer equal to or more than two) bits; a voltage selection circuit that selects a reference voltage corresponding to the converted gray-scale data of each color component among reference voltages of 2 j types and outputs the reference voltage as a data voltage for each color component; and a driving circuit that drives an electro-optical based on a data voltage of each color component for each color component; the gamma correction circuit for an i-th color component generating converted gray-scale number information of 2 ki types based on gray-scale indication information to indicate reference voltages of 2 i types among the reference voltages of 2 j types is set, the gray-scale indication information being 2 j bit information, 2 j bits being divided into a plurality of blocks to each of which block data is allocated, each block having a plurality of bits, the gamma correction circuit for an i-th color component a matching block at which the gray-scale data matches the converted gray-scale number information, and a bit position that is indicated by the gray-scale indication information in the matching block and at which the gray-scale data matches the converted gray-scale number information, and the gamma correction circuit for an i-th color component generating the converted gray-scale data based on block data allocated to the matching block and bit data corresponding to the bit position.