In an active matrix LCD, different signal voltages are applied to adjacent pixels or sub-pixels. Averaged brightness of the adjacent pixels or sub-pixels displays a typical γ curve while viewing right from the front, and on the other hand, displays a constant γ curve within a specified color level (signal voltage) range while viewing at a skew angle from the front. Accordingly, a true image can be seen from the front while the image becomes visibly unidentified at a skew angle from the front.