Patent ID: 6924601

Claim:
A display driver comprising: a first reference current source and a second reference current source both for supplying a reference current; a first current-input transistor of a first conductive type including a control portion, a second impurity diffusion layer and a first impurity diffusion layer connected to the first reference current source; a second current-input transistor of the first conductive type including a control portion, a second impurity diffusion layer and a first impurity diffusion layer connected to the second reference current source; a plurality of mirroring devices to which currents fed to the first current-input transistor and the second current-input transistor are distributed and which are composed of transistors of the first conductive type including control portions connected to one another; and current adding means connected to the plurality of mirroring devices for changing the output current by adding currents produced in the mirroring devices selected from among the plurality of mirroring devices in accordance with display data, wherein the display driver is integrated on a chip.