Column driver for an active matrix liquid crystal display

摘要

A liquid crystal display device comprises a source follower circuit having an NMOS source follower transistor (11) with a drain thereof connected to a power supply (Vcc) and a current supply (12) connected across the source of this transistor (11) and earth. One end of a capacitor (13) is connected to the gate of the transistor (11), a first analog switch (15) is connected across the gate of the transistor (11) and a precharge supply (14), a second analog switch (16) is connected across the other end of the capacitor (13) and the source of the transistor (11), and a third analog switch (17) is connected across the other end of the capacitor (13) and a signal source (Vin). <IMAGE>