Patent ID: 7612768

Claim:
A display driver, comprising: a scan driver and a data driver which drive a display panel; a one-time PROM (OTP) circuit which includes a plurality of OTP cells; a control circuit; and a control register, a display characteristic parameter corresponding to display characteristics of the display panel being written into the OTP circuit during initialization, the control register stores the display characteristic parameter supplied from the OTP circuit, each of the plurality of OTP cells including a floating-gate transistor which has a floating gate, the control circuit outputting a read signal to the OTP circuit when the control circuit reads the display characteristic parameter from the OTP circuit, the control circuit outputting a write signal to the OTP circuit when writing the display characteristic parameter into the OTP circuit, the control circuit performing refresh operation at a predetermined timing set in a first half of a non-display period of the display panel, the refresh operation including reading the display characteristic parameter from the OTP circuit and rewriting the display characteristic parameter into the control register, each of the plurality of OTP cells including a decision transistor provided between a node of a first power supply and a node of a second power supply, a reference voltage being input to a gate of the decision transistor, the OTP circuit including a reference cell that includes the floating-gate transistor, and the reference cell generating the reference voltage.