PCT No. PCT/JP95/02369 Sec. 371 Date Oct. 28, 1996 Sec. 102(e) Date Oct. 28, 1996 PCT Filed Nov. 21, 1995 PCT Pub. No. WO96/16347 PCT Pub. Date May 30, 1996A video signal is sampled by sequential switches (104), etc. and the voltage held in capacitors (150) after passing through switches (110). Next, switches (120), (130) turn on, the hold for capacitor (152) is carried out, and that voltage buffered by analog buffer (170), then output. The switch on-off control is performed by means of lines L1 and L2. The control of the supply voltage is performed by V1+ to V4+, and the polarity of analog buffers (170), (172), etc. is controlled. By means of the switch on-off control and the supply voltage control, four driving methods for alternating liquid crystal driving can be realized. Further, the analog buffers are composed of TFTs; and positive and negative polarity inversion can be performed through supply voltage shift.