Abstract:
Generally, this disclosure concerns the angle sensitivity of polarization switch elements and the resulting impact of the ray direction on performance. More specifically, apparatus and techniques for compensating the angular sensitivity of liquid crystal (LC) polarization switches are described that enhance the performance of polarization switches. For example, a polarization switch is disclosed that transforms linearly polarized light of an initial polarization orientation that includes a first and second liquid crystal cell with a compensator located between the LC cells. The compensator layer is operable to enhance the field of view through the polarization switch. Such compensation techniques are particularly useful for short-throw projection environments.
Abstract:
Generally, this disclosure concerns the angle sensitivity of polarization switch elements and the resulting impact of the ray direction on performance. More specifically, apparatus and techniques for compensating the angular sensitivity of liquid crystal (LC) polarization switches are described that enhance the performance of polarization switches. For example, a polarization switch is disclosed that transforms linearly polarized light of an initial polarization orientation that includes a first and second liquid crystal cell with a compensator located between the LC cells. The compensator layer is operable to enhance the field of view through the polarization switch. Such compensation techniques are particularly useful for short-throw projection environments.
Abstract:
The present invention relates to a phase difference film, to a method for manufacturing same, and to a liquid crystal display device comprising the phase difference film. In detail, the present invention relates to a phase difference film comprising: 1) an acrylic film; and 2) a coating layer made of a negative C-type material. The phase difference film according to the present invention can be applied to an in-plane switching mode liquid crystal display device. The phase difference film of the present invention has an adjustable ratio between a plane direction phase difference value and a thickness direction phase difference value.
Abstract:
This invention relates to novel compositions comprising regioselectively substituted cellulose esters. One aspect of the invention relates to processes for preparing regioselectively substituted cellulose esters from cellulose dissolved in ionic liquids. Another aspect of the invention relates to the utility of regioselectively substituted cellulose esters in applications such as protective and compensation films for liquid crystalline displays.
Abstract:
The invention relates to the preparations and uses of cellulose esters with a high degree of substitution of hydroxyl groups (also called high DSoh cellulose esters from 0.40 to 2.00 as substrates and/or negative C-plate optical compensation films in LCD applications.