Analog video signal correction device and tft liquid crystal display device

PURPOSE: To provide a TFT liquid crystal display panel driver having the capability of coping with the dispersion of devices as well as the fluctuation of temperature and power voltage. (differential amplifier, analog driver). CONSTITUTION: Reference voltage generated with a reference voltage generator 7 is supplied to a buffer amplifier equivalent circuit via a control circuit and to a display cell equivalent circuit actuated with the control circuit, and a response signal to the inputted voltage is sent out from a TFT emulator circuit 11. In addition, the output signal and the reference voltage generated with the reference voltage generator 7 are compared with each other in a difference detection circuit, and an output signal corresponding to the difference is sent to a correction circuit 5. Then, the correction circuit 5 corrects an analog video signal generated at a prestage by use of the output. The corrected analog video signal is outputted to a TFT liquid crystal display panel 23 via a sample hold circuit and a buffer amplifier 21. COPYRIGHT: (C)1996,JPO