Color liquid crystal display device and liquid crystal display apparatus.

摘要

A birefringence control type of color liquid crystal display device (18) includes a liquid crystal cell (18) including first and second substrates (1,2); first and second electrodes (3,7) formed on opposing surfaces of the first and second substrates (1,2); a first aligning film (8) formed on the first electrode and subjected to an aligning treatment in a first direction (8a); a second aligning film (9) formed on the second electrode (7) and the second substrate (2) and subjected to an aligning treatment in a second direction (9a) intersecting the first direction (8a) at substantially 90 degrees; and a liquid crystal (11) sealed between the first and second aligning films (8,9) and twisted at substantially 90 degrees. The device further includes a first polarization plate (13) arranged outside of the second substrate (2) and having a transmission axis (13a) intersecting the first direction (8a) at substantially 140 to 160 degrees; a second polarization plate (14) arranged outside of the first substrate (1) and having a transmission axis (14a) intersecting the transmission axis (13a) of the first polarization plate (13) at substantially 10 to 40 degrees; a first retardation plate (17) arranged between the second substrate (2) and the second polarization plate (12), with a direction of a maximum refraction index intersecting the first direction (8a) at substantially 130 to 160 degrees; and a second retardation plate (16) arranged between the second substrate (2) and the second polarization plate (14), with a direction of a maximum refraction index intersecting the first direction (8a) at substantially 40 to 80 degrees. In a first voltage range the display colour changes in accordance with the voltage whereas in a second voltage range the display is colourless and changes its brightness in accordance with the voltage.