Technology Papers
A brief abstract of the paper is provided under the title. Should you wish more, simply clicking on the title will open the full paper in a new window.
A brief abstract of the paper is provided under the title. Should you wish more, simply clicking on the title will open the full paper in a new window.
Dynamically Driven Polymer Stabilized Black and White Cholesteric Liquid Crystal Display
A polymer stabilized reflective black and white cholesteric LCD addressed with the dynamic drive scheme is reported. The polymer matrix is optimized to produce a broad reflective spectrum from the planar texture and also produce a response characteristic adapted for the dynamic drive scheme.
High Twisting Power Chiral Materials for Cholesteric Displays
New chiral non-racemic compounds are developed that provide, for the first time, a high twisting power additive for nematic liquid crystals, available in both left and right-handed enantiomers, suitable as single chiral components for reflective cholesteric displays. A unique feature of the chiral compounds is that only a single chiral compound is required to achieve a temperature independent twisting power over a wide temperature range.
Optimization of Dye Concentration in Reflective Cholesteric Displays
The detailed study of the relationship between dye concentration and optical characteristics of reflective cholesteric LCDs is presented. It is found that color purity, chromaticity, lightness, and contrast ratio are dependent on the dye concentration. This provides a method to achieve the optimal optical characteristics of Ch-LCDs by simply adjusting the dye concentration.
Reflective Cholesteric Display Technology and Its Application
Reflective cholesteric displays are beginning to be adapted into the portable instrumentation and public signage applications. This is because of their low power capability and unique optical performance. This technology is compatible with existing STN display infrastructures, such as drive, control, and manufacturing. With the recent development of the ebook market, more interest is emerging for this technology. In this paper we will present a technological review of ChLCDs and their applications as well as the most recent developments from our company. We will address display optical properties, display drive methods, gray scale and full color, lighting methods, and peripheral drive and control electronics. Efforts towards full video will be discussed as well.
Transflective Bistable Cholesteric Liquid Crystal Display
The first transflective bistable cholesteric liquid crystal display is described. Both the transmissive and the reflective modes of operation are explained and discussed. The dual mode display greatly enhances the usefulness of the cholesteric display technology by enabling its use in low ambient lighting conditions.