20.3: Novel Type of Bistable Reflective Display using Quick Response Liquid Powder

Abstract

We have developed new liquid‐behavior‐powder materials that realize a novel type of bistable reflective display showing paper‐white appearance, high contrast and quick response. The demonstrated display has a 160×160 array of pixels and a 3.1‐ inch diagonal viewable image size with a pixel response less than 0.2 msec and is driven by passive‐matrix addressing.

Trends in Microencapsulation Research

“…A paper-like display system employing microparticle technology has also gathered much attention from companies in Japan in the fields of electronics and information. For example, a tonertype display system [44], an in-plain-type display system [45], a liquid powder display system [46] and a Gyricon-like cylindrical display system [47] have been developed by Fuji Xerox Co., Ltd., Canon Inc., Bridgestone Corporation, and Oji paper Co., Ltd., respectively. Powder engineers have also achieved marvelous results with the development of liquid powder that is 10 times smaller in bulk density (Figure 7).…”

An Analysis of Reflectivity and Response Time by Charge-to-Mass of Charged Particles in an Electrophoretic Display

“…To perform the above functions properly, bistability is required. Reflective electronic displays using negatively and positively charged particles, such as toner and quick responseliquid powder displays (QR-LPD), have excellent bistability, a well-defined threshold voltage, and extremely fast response time in comparison with other reflective displays [4][5][6][7][8]. Thus, images are maintained for a long time without any bias voltage.…”

Effect of Discharging Process on Electrical and Optical Properties in Charged Particle-type Reflective Electronic Display

“…Reflective electronic displays using positively and negatively charged particles, such as a quick response-liquid powder display (QR-LPD) and a toner display [1][2][3], have the following advantages: (1) images can be maintained over a long period of time without additional bias voltage; (2) such a display has a wide viewing angle and a very fast response time; and (3) both the active and the passive matrices can be driven by the intrinsic threshold voltage [4][5][6]. Despite these obvious advantages, expensive driving boards resulting from a high driving voltage, a short lifetime, and other drawbacks still impede the progress of this technology in the display market.…”