Michikazu Noguchi

Bend Transition in Pi-cell

Despite lack of knowledge on the nucleation process, the bend domain growth is observed as a motion of disclinations, whose velocity can be determined from the energy difference between two states by applying the boundary-layer model and a damping factor. The disclination velocity is proportional to the electric field across the cell. Upon application of a bias, a transient splay state having a fast bend spreading velocity emerges, which then changes into the asymmetric splay state very quickly, leaving the average bend spreading velocity very low. When the bias voltage drops down to zero, the asymmetric splay state relaxes back to a homogenous state, which, applying the bias voltage again, returns to the transient splay. The repetition of turning on and off the bias voltage enhances the average bend advancing velocity, and therefore is useful for fast bend transitions in an active-matrix liquid crystal display.

A novel dot‐pattern generation to improve luminance uniformity of LCD backlight

We report on a novel theoretical approach to generate irregular dot patterns, providing an integrated solution to difficulties peculiar to collimated -type backlight units. By applying this technology to a light guide and a diffuser film, the

43.1: Color Filterless Liquid Crystal Display Illuminated with LEDs

We have prototyped a 13.3-inch diagonal color filterless LCD illuminated with LEDs. A new color directional backlight combined with a microlens attached liquid crystal cell plate shows the feasibility of a new power efficient LCD with better color and lead-free features.

Seal characterization for supernarrow periphery LCD panel

Control of the seal edge of LC cells with super narrow periphery is very important for the application to compact AM-LCD designs. Several thermal cure epoxy resins have been studied as candidates for LC panel seal materials, with emphasis on characterizing the seal edge. The factors affecting material selection are its effect on LC alignment, the seal edge waviness or straightness, the formation of the seal edge boundary during lamination and cure and finally, its compatibility with standard cell processing techniques. Optimal seal material selection is discussed in view of its application to the design and fabrication of super narrow periphery LC cells. Cell design of seal edge control is also discussed in view of application of seal characterization and structural contribution, including material and process matching.