Image display device and method of driving liquid crystal panel

1. An image display device, comprising:

a liquid crystal panel for displaying an image, the liquid crystal panel having plural pixels, each pixel having a respective transmissivity, the image comprising plural frames,

a light source;

a light transmission unit that makes a light from the light source pass through the pixels only for a length of time within a frame cycle of the image;

a drive signal-generating unit that generates a drive signal to periodically vibrate the transmissivity of each pixel of the liquid crystal panel between a maximum value of the transmissivity and a minimum value of the transmissivity, wherein the drive signal is a successive rectangular wave including a first voltage level and a second voltage level that are independent of a tone data carried by an image signal, and that are never changed according to the tone data; and

a phase control unit that controls the drive signal in phase based on the tone data to express a tone corresponding to the tone data.

2. The image display device of claim 1 , further comprising:

a correction unit that changes the drive signal so as to make time variations in the transmissivities of the pixels uniform.

3. The image display device of claim 1 ,

the light source being a solid-state light source; and

the light transmission unit being a drive circuit, the drive circuit forcing the solid-state light source to blink periodically.