Patent ID: 7456915

Claim:
A liquid crystal display panel with improved image contrast comprising an array of pixel regions and a sequence of elements comprising a recycling backlight structure comprising a broadband rear interference polar (RI-Polar) having a transmission axis AB with preset orientation, a spatial intensity modulation structure for modulating the light of each pixel region, a broadband front interference polar (FI-Polar) having a transmission axis approximately parallel to the transmission axis AB, a spectral filtering structure associated with each said pixel region, wherein said RI-Polar and said FI-Polar are multilayer structures of stacked layers and at least one layer of each multilayer structure is optically anisotropic, being made by means of Cascade Crystallization Process and characterized by a globally ordered biaxial crystalline structure with an intermolecular spacing of 3.4±0.3Å in the direction approximately parallel to the transmission axis AB, is transparent in the wavelength band of visible light, and is formed by rodlike supramolecules which represent at least one polycyclic organic compound with a conjugated π-system and ionogenic groups, wherein at least one optically anisotropic layer is manufactured from a lyotropic liquid crystal based on at least one dichroic dye and said lyotropic liquid crystal comprises sulfoderivatives of acenaphto[1,2-b] quinoxaline.