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.
Recent Advances in Cholesteric Displays
Cholesteric displays are under development for handheld devices where bistability is used to minimize power consumption. Cholesteric materials and cell designs are optimized for full-color reflective brightness, contrast and view angle. Recent advances in power-efficiency, full color, brightness and plastic displays are described.
Super High Brightness Reflective Cholesteric Display
A unique way to dramatically enhance the brightness of single layer and stacked reflective cholesteric LCDs is shown. The LC aligning surfaces are treated to provide varying degrees of homogeneity while maintaining the bistability. The result is reflective displays with exceptionally high brightness approaching that of printed paper.
New Techniques for Fabrication of Flexible Plastic LCDs
We report simple techniques to manufacture low-powered, high-resolution, reflective cholesteric displays using flexible plastic substrates. We use wax transfer printing to replace photo-lithography and incorporate polymer walls to increase the mechanical strength and lifetime of the displays. These printing methods can easily be adapted to roll-to-roll production.
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.
Study of Relaxations in Cholseteic Liquid Crystals after Reduction of an Electric Field
It is well known that, upon reduction of an applied electric field, cholesteric systems transform to their equilibrium state through a 'transient planar' state. However the detailed description of this transformation, as a function of bias voltage, has not been known. In this paper we study a cholesteric sample having a thickness of 15µm and a pitch of 5.36 µm using both experimental and numerical simulation. We show the details of the director filed dynamics as these systems transform from the high field homeotropic state to the equilibrium state, as a function of voltage. From this understanding we will suggest improvements for increasing the speed of these transactions.