Advanced ASM mode (axially symmetric aligned microcell mode): Improvement of display performance by using a negative‐dielectric liquid crystal

Abstract

Abstract— We have developed an advanced axially symmetric aligned microcell mode using negative‐dielectric liquid crystal (N‐type ASM mode), the first in the world. Using compensation film for this N‐type ASM mode cell realizes the wide viewing angle of ±,80° in all azimuths, and a high contrast ratio of 300:1. The structure of this N‐type ASM‐mode panel is suitable for large‐sized display panels. This mode is applicable for such active display panels as TFT and PALC1 displays, regardless of the difference of their drive systems. We consider that this N‐type ASM mode will be a key technology for next‐generation monitors.

P-175: Single Step Surface Alignment Patterning in Liquid Crystals Using Polarization Holography Exposure

“…To date, many groups have demonstrated methods of manipulating surfaces to achieve patterned alignment configurations of liquid crystal materials for display applications [1][2][3][4][5][6][7][8][9][10]. These methods which include patterning linear photopolymerizable polymer alignment layers using photolithography masks [1] or holography [2][3][4], electrically active and controllable surfaces [5], micro-rubbing [6], atomic force microscopy (AFM) scribing [7], self assembly of monolayers [8], direct laser writing [9], [10], azo-dye doped polyimide layers [11], and multidomain alignment established by polymer networks and [12] are examples in which liquid crystal alignment can be controlled in one or more directions, enabling novel multidomain liquid crystal geometries to expand the viewing angle capabilities in flat panel displays. These multidomain configurations thus provide larger and enhanced viewing angle cones compared to single domain liquid crystal alignment established by conventional rubbed polyimide coated surfaces.…”