for darkening the darkest level value 0 in a specified range of the lower portion is used as the overdrive value on the other hand as shown in fig7 b with regards to the second lookup table 24 the predicted level value in the hatching portion near the diagonal is consistent to the target level value since these hatching portions are defined by single values as shown in fig8 the two lookup tables can be combined by recording overdrive values in the area near the diagonal predicted level value target level value and recording predicted level values in the other area overdrive value 0 or 255 the block diagram of the lcd according to this embodiment is illustrated in fig9 in which the second lookup table 24 and the second memory 25 are omitted the predicted value d u2032 n outputted from the first lookup table 22 is inputted into the second frame memory this embodiment differs from the embodiment shown in fig3 only in the operation that two values i e a value acquired from fig8 according to the initial level value and the target level value and a value required to be hidden are used as the overdrive value and the predicted level value depending on area the other parts are similar therefore it is not to be redundantly described furthermore it is feasible to apply a voltage higher than the preset voltage corresponding to the level value 255 as the overdrive voltage please refer to fig1 it can be seen that when the driving voltage is increased from the starting voltage 0v black level to an overdrive voltage 5v white level the.