Abstract:
Methods and systems for an electro-optic filter that operates in two modes-a homogeneous mode and a heterogeneous mode. The homogeneous mode maintains a relatively homogeneous shading/attenuation range across specified viewing angles in both the vertical and horizontal directions. The heterogeneous mode provides for relatively homogeneous shading/attenuation range across specified viewing angles in the horizontal direction but allows for gradual and a more varying (e.g., wider) range of shading/attenuation changes across the specified viewing angles in the vertical direction, e.g., as compared to the horizontal direction.
Abstract:
Disclosed is a birefringent film containing an ester polymer having high solubility. The birefringent film has a high birefringence ?nxz (= nx - nz) in the thickness direction. The ester polymer used in this invention comprises at least a repeating unit represented by formula (I), wherein A and B independently represent a substituent substituting a stilbene group, namely a hydrogen atom, a halogen atom, an alkyl group having 1-6 carbon atoms, or a substituted or unsubstituted aryl group; a and b represent the respective numbers of substitution of A and B, which is independently an integer of 0-4; R1 represents a hydrogen atom, a linear or branched alkyl group having 1-10 carbon atoms, or a substituted or unsubstituted aryl group; R2 represents a linear or branched alkyl group having 2-10 carbon atoms; R3-R6 independently represent a hydrogen atom, a halogen atom, a linear or branched alkyl group having 1-6 carbon atoms, or a substituted or unsubstituted aryl group; and n represents an integer of not less than 2.
Abstract:
The present invention relates to a colour liquid crystal display (LCD) device and, more particularly, to the improvement of colour LCDs aimed to achieving a high contrast ratio and better colour rendering at wide viewing angles. The disclosed colour liquid crystal display comprises first and second polarizing plates facing each other, a liquid crystal cell situated between said first and second polarizing plates, and at least one compensation panel situated between said first and second polarizing plates. The compensation panel comprises at least one matrix of patterned birefringent elements of / kinds having different retardation, wherein / is 3, 4 or 5. The patterned birefringent elements comprise at least one retardation layer comprising at least one polycyclic organic compound with a conjugated p-system and functional groups which are capable of forming non-covalent bonds.
Abstract:
The invention relates to the preparations and uses of cellulose esters with a high degree of substitution of hydroxyl groups (also called high DS OH cellulose esters) as substrates and/or negative C-plate optical compensation films in LCD applications.