Liquid crystal display apparatus.

摘要

Provided is a liquid crystal display apparatus of active matrix type, in which a large number of gray levels can be displayed. A drive circuit for driving a plurality of display panels comprises a plurality of sections each including a sample-and-hold circuit 22. The sample-and-hold circuit 22 has a plurality of switches Sw 1 through Sw 4. To these switches are separately supplied different ramp signals Vr 1 through Vr 4 from a ramp generator circuit 24 shared by all the sections. These ramp signals have waveforms which respectively assume a plurality of voltage levels and are shifted relative to each other by a predetermined level. A decoder 21 controls one of the switches Sw 1 through Sw 4 so that a specific order of voltage level in one of the ramp signals Vr 1 through Vr 4 is selected depending on the gray scale data in the latch 20. The output of the sample-and-hold circuit is transmitted to the data line 7a via a buffer 23. <IMAGE>