Amazon Kindle D00111 Bedienungsanleitung PDF herunterladen (Seite 14)

2.4.7.2 Bridgestone (Quick Response – Liquid Powder Display, QR-LPD)

The Quick Response–Liquid Powder Display was developed in March 2002 by Bridgestone.

“Electronic Liquid Powder®, as its name suggests, is a high-fluidity material that combines

the properties of powder and liquid and that is highly sensitive to electricity” [10]. QR-LPD is

bistable and the response time of the display is 0.2 milliseconds, which is 100 times faster

than LCD displays. As a result of its response speed simple matrix drive is used to display

text and graphics and like most reflective displays it stores its image when the electrical

power has been turned off. The simple matrix drive means that electrodes are only required

around the display as opposed to active matrix drive where every pixel requires its own

transistor. To make the displays much flexible and thin, plastic panels are used on the outer-

layer instead of glass panels [10]. Initial technological bottleneck like image distortion when

bent was solved by the use of special rib structure. The company hopes to realize true-color

by overlaying with special color filters [19]. A commercial product made by Hitachi using the

technology is already in the market namely “Albirey” the monochrome A4 size information

display module [11].

Figure 2.9: Cross-section of QR-LPD (Image courtesy of Bridgestone [19])

2.4.8 Colored E-Paper

The E-paper technology is evolving very fast and several companies are working very hard to

move to the next stage, which is incorporating color to their respective technology. Many

companies are approaching this by adding a color filter layer to their frontplane while others

like the cholesteric technology companies must add three primary color layers (RGB) to

achieve full color.

“Fujitsu's rewritable color e-paper is based on highly reflective cholesteric selective

reflection technology” [16]. This is Fujitsu announcing that they have produced a colored e-

paper (FLEPia) another company that has produced a colored e-paper using E-Ink frontplane

is LG.Philips. “LG.Philips, LCD Develops World’s First Flexible Color A4-Size E-Paper”

[7]. Liquavista and Advance Display Technologies also have colored E-Paper in the market.

The remaining companies in the E-paper manufacturing business are also in the verge of

making colored E-papers.

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 67 68

Keine Kommentare

Amazon Kindle D00111 Bedienungsanleitung Seite 14