Liquid crystal display device.

摘要

In an STN type liquid crystal display device, two retardation plates (112, 113) are located one on each side of an STN liquid crystal cell (101). A twist angle m0 of the liquid crystal material (109) is set to fall within the range of 200 DEG to 240 DEG , and the DELTA n.d value of the liquid crystal is set to fall within the range of 700 nm to 900 nm (measurement wavelength: 589 nm). With respect to the direction of aligning treatment of an incident-side substrate (104), the light-transmitting axis of a polarizer (110) is inclined at an angle falling within the range of 140 DEG to 180 DEG , the light-transmitting axis of an analyzer (111) is inclined at an angle falling within the range of (270 DEG -¦ phi 0¦/2) +/- 10 DEG , the phase delay axis of the first retardation plate (112) is inclined at an angle falling within the range of (180 DEG -¦ phi 0¦/2) to (180 DEG - ¦ phi 0¦/2) + 30 DEG , and the phase delay axis of the second retardation plate (113) is inclined at an angle falling within the range of (180 DEG -¦ phi 0¦/2) to (180 DEG -¦ phi 0¦/2) - 30 DEG . The DELTA n.d value of each of the first and second retardation plates (112, 113) is preferably set to be 1/2 (i.e., 2 in 1/2 represents the number of retardation plates) a value obtained by multiplying the DELTA n.d value of the liquid crystal with 0.80 to 0.95. <IMAGE>