Tsuyoshi Uemura

Shock-problem free flcds and mechanism of alignment destruction by mechanical shock

Abstract The mechanism of alignment destruction of FLCDs by a mechanical shock is discussed and a radical solution for the problem is suggested. It is cleared by computer simulation that the alignment destruction is caused by shear between both substrates when a panel is deformed. Against a general concept that stiffer panels can resist more shock, we found that very thin and light panels with a flexible substrate like a plastic film are free from such shock-problem. The reason why AFLCDs is more durable against shock than FLCDs is also discussed.

Multi-color projection display

Abstract A large size, ultra-high resolution display has been demanded for the computer systems such as CAD and workstation. In order to realize the demand beyond the ability of CRT, the laser-addressing liquid crystal projection displays have already been in practical use. However, those type of projection displays have a disadvantage that it takes a few minutes to redraw the entire screen.

AC-field-stabilized matrix ferroelectric LCD

Abstract Using a newly developed driving method for AC-field-stabilized matrix ferroelectric LCDs, high contrast and flickerless displays are obtained in 1000 line multiplexing for rubbed and oblique-evaporated panels, each of them possessing 640 × 400 pixels of size 12 inch, 4 μm thick. In this paper, the novel driving method, the display performance, and dependancy of the AC stabilizing effect on cell thickness, are described.

Molecular Reorientaion Process in Chiral Smectic I Liquid Crystal

The molecular alignment in chiral smectic I (SmI*) phase with the bond orientational hexatic ordering in the layer has been studied by observing surface stabilized ferroelectric liquid crystal cells of 8SI* under an optical polarizing microscope. With decreasing temperature from SmC* to SmI*, two twisted states change to two corresponding uniform states. Under an appropriate condition in SmI*, there appear four distinct states which are corresponding to the in-plane projection of the six sites of the hexagonal net. These four states are divided by two kinds of boundaries, which rotate the C-director by ±π/3 and ±π, respectively.

P‐35: Simulation Study of Light Emission of a Backlight System with a Broad Band Cholesteric Liquid Crystal Polarizer

We analyzed the light emission from a backlight system with a cholesteric broad band polarizer by using Berrman 4×4 method. We found that light intensity in directions with polar angle smaller than 30°o was increased and higher than the back light system with only a linear polarizer. We also designed a light recycling backlight system and calculated the light efficiency.