an information signal connected to the matrix circuit of the electro optical device the driving circuit 352 comprises two parts when divided by a driving frequency system i e one is a data latch circuit system 353 which is the same as in the conventionally known driving method and which primarily comprises a basic clock clk signal circuit 355 for transferring the signals of a data signal circuit 356 in order performing one bit to twelve bits parallel processing the other is a part in accordance with the present invention and comprises a clock 357 corresponding to the degree of division necessary for gradation display a flip flop circuit 358 and a counter 360 the counter 360 forms a bipolar pulse generation timing corresponding to the gradation display data sent from the data latch system 353 further the gradation display data can be controlled in finer way when a rom table for converting u03b4t into sine is used between the exit of the latch circuit and a data line 361 the present invention is characterized in that the clear digital gradation display is possible without changing the number of frames for re writing the screen by taking two kinds of driving frequencies the generation of flickering and the like caused by the decrease in the number of frames can be prevented on the other hand a driving circuit 364 connected to signal lines 363 362 on a scanning side controls the sine wave transmitted from a sine wave oscillating circuit 365 by a flip flop circuit 366 of a clock clk 367 and the select signal is applied to the signal lines 363 362 by digitally controlling the.