Level converter circuit and a liquid crystal display device employing the same

摘要

A display device includes a pixel driver circuit. Each of level converter circuits in the pixel driver circuit has an input terminal supplied with a signal swinging between a first voltage and a second voltage lower than the first voltage; a first first-conductivity-type transistor having a gate electrode coupled to the input terminal, and a source region coupled to a reference voltage; a second second-conductivity-type transistor having a gate electrode coupled to a drain region of the first transistor, a source region-coupled to a power supply, and a drain region coupled to an output terminal; one circuit element among a diode, a resistor and a fourth second-conductivity-type transistor, coupled between the gate electrode of the second transistor and the power supply; a third first-conductivity-type transistor having a source region coupled to the input terminal, a drain region coupled to the output terminal, and a gate electrode supplied with a do voltage.