Patent ID: 6906763

Claim:
A liquid crystal display device comprising: a displaying liquid crystal cell having a liquid crystal layer sandwiched by a pair of transparent substrates with transparent electrodes so as to maintain a state of twisted alignment when a voltage applied to the liquid crystal layer is not more than the threshold voltage, a compensation cell having a liquid crystal layer sandwiched by a pair of transparent substrates so as to maintain a state of twisted alignment in which the direction of twisting is opposite to that in the displaying liquid crystal cell and the twist angle is substantially the same as that of the displaying liquid crystal, the compensation cell having substantially the same retardation value as the displaying liquid crystal cell, wherein the displaying liquid crystal cell and the compensation cell are arranged so that directions of alignment of liquid crystal molecules at sides of adjacent transparent substrates are substantially perpendicular to each other, and a pair of polarizing plates disposed to sandwich the displaying liquid crystal cell and the compensation cell so that their polarization axes are substantially perpendicular to each other, the liquid crystal display device being characterized in that: a backlight is disposed to irradiate light whose half value width with respect to the peak luminance is at least 5 nm, and there is a difference of thickness of at least 0.05 mm between the thickness of the transparent substrate of the displaying liquid crystal cell at a side of compensation cell and the thickness of the transparent substrate of the compensation cell at a side of displaying liquid crystal cell.