Patent ID: 8223142

Claim:
A display panel drive apparatus that drives a current drive type of display panel via data lines, comprising: a current controlling voltage generating circuit to generate a current control voltage; a plurality of output drivers to supply brightness pulses based on said current control voltage respectively onto said data lines in synchronization with a clock signal; and a clock generating circuit to generate a pulse signal having a pulse period based on said current control voltage, said pulse signal being used as said clock signal; wherein each of said plurality of output drivers comprises: a drive pulse generating circuit to generate a drive pulse whose pulse width corresponds to brightness data in synchronization with said clock signal; and a current source circuit to be switched on and off by said drive pulse, thereby generating a current pulse whose amplitude corresponds to said current control voltage, said current pulse being used as said brightness pulse, and wherein said clock generating circuit comprises: at least one minor current source circuit to generate a minor current having a magnitude based on said current control voltage; an integration circuit to integrate said mirror current; and a pulse signal generating unit to generate, as said clock signal, a pulse signal having a pulse period based on integration time required by said integration circuit until an integral calculated by said integration circuit reaches a threshold value.