| 摘要 |
PURPOSE:To obtain a time divided driving method which lowers a high-frequency voltage and does not deteriorate an element by the DC by impressing writing voltage pulses to determine a light transmission state to a liquid crystal layer in the writing period of a light transmission and impressing the synthesized voltage of a 1st AC voltage and 2nd AC voltage in a period when the state is maintained. CONSTITUTION:The 1st AC voltage Vac1 is smaller in the absolute value of a crest value and lower in the frequency than the 2nd AC voltage Vac2 and the inversion torque directions based on the interaction of the spontaneous polarization vary at all times when the AC voltage is impressed and, therefore, the change in the light transmission quantity is small. The dielectric torque required to suppress the change in the light transmission quantity is required small in the case of impressing the 2nd AC voltage Vac2 in this state. The crest value of Vac1 can eventually be made smaller in the absolute value and is maintained with the good state maintaining effect. For example, the absolute value of the crest value of the voltage which impresses a difference between the scanning voltage VX and the signal voltage VY to the liquid crystal layer and is impressed on the liquid crystal layer in the non-selection period is the synthesized waveform of the AC voltages Vac1 and Vac2(VH) in which the absolute value of the crest value is VO and the pulse width is equal to the pulse width of the signal voltage. The maintenance characteristic thereof is thereby greatly improved.
|
