Patent ID: 6031515
Filing Date: 2000-02-29
Classification: G09G

Abstract:
A display driver for a display unit which includes a plurality of display elements arranged in a matrix of rows and columns, comprising:a column driver for switchably outputting one of a plurality of voltages to the display elements on one of the columns, said column driver including a decoder and a plurality of analog switches, each analog switch being formed from a semiconductor switch and controlled to be opened or closed by an output signal of said decoder;one of said analog switches which outputs a voltage of the lowest potential being formed from a MOS field effect transistor connected between a potential supply point of the lowest potential to be outputted and an output point so as to form a current path;said MOS field effect transistor having a back gate electrode connected to the potential supply point of the lowest potential; anda level shift circuit for level shifting a lower side potential from among the output signals of said decoder to the lowest potential to be outputted and providing the level shifted signal to a gate electrode of said MOS field effect transistor.