Liquid crystal display apparatus having level conversion circuit

Abstract

A liquid crystal display apparatus including a level conversion circuit in which a high speed operation can be attained and also a small transistor capacity can be obtained. In the liquid crystal display apparatus, a signal circuit for driving pixel elements of a display unit and a scanning circuit are provided. The level conversion circuit is constituted of first and second transistors and , the respective gate electrodes of which are connected to a first bias voltage power supply, and third and fourth transistors and , the respective gate electrodes of which are connected to a second bias voltage power supply and the respective source electrodes of which are connected to a power supply. The drain electrodes of the first and the second transistors and are connected to the respective drain electrodes of the third and the fourth transistors and . To the respective source electrodes of the first and the second transistors and , signals having a mutually different polarity and a low amplitude are inputted and from the respective drain electrodes of the first and the second transistors and , signals having a mutually different polarity and a high amplitude are taken out.