| 摘要 |
<p>A liquid crystal unit (10) provided with a liquid crystal panel (2) having a structure where antiferroelectric liquid crystal or ferroelectric liquid crystal is held between a pair of substrates (23a, 23b), and a back light (1) for illuminating the liquid panel. In order to improve the quality of image on the dispay screen, the quantity of output light from the back light (1) is regulated in accordance with the variations of the cone angle, the temperature of the liquid crystal panel (10) when in use, the polarization inversion current and the transmitted light. The relative angles of two polarizing plates (21a, 21b) is adjusted in accordance with these variations. The display screen shows an image of an excellent quality.</p> |
