LIQUID CRYSTAL DISPLAY Russian patent published in 2012 - IPC G02F1/13363 

FIELD: physics.

SUBSTANCE: liquid crystal display device includes a double-layer dispersion-type delay film with inverse wavelength dispersion, having R0(B)/R0(G) and Rth(B)/Rth(G) not greater than 0.965, and R0(R)/R0(G) and Rth(R)/Rth(G) not less than 1.015; and a liquid crystal cell with vertical molecule alignment, which has layers of blue, green and red colour filters and which satisfies the relationships Rth_LC(B)/Rth_LC(G)≥1.000 and Rth_LC(R)/ Rth_LC(G)> 1.000. R0(B), R0(G) and R0(R) denote delay in the plane of the delay film at wavelengths 450 nm, 550 nm and 650 nm. Rth(B), Rth(G) and Rth(R), and Rth_LC(B), Rth_LC(G) and Rth_LC(R), respectively, denote delay in the direction of the thickness of the delay film and the liquid crystal cell at wavelengths 450 nm, 550 nm and 650 nm.

EFFECT: device has high contrast and does not have colouring when displaying black colour in a wide range of viewing angles.

5 cl, 8 dwg, 2 tbl