Electrophoretic display device

Details Electrophoretic display device Electrophoretic display device

2006-12-05

2006-12-05

Lefkowitz, Sumati (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C359S296000

Reexamination Certificate

active

07145547

ABSTRACT:
The invention relates to a display device for displaying information comprising a plurality of display elements with an electrophoretic medium, a first electrode (6), a second electrode (6′) and a third electrode (7) associated with each display element for receiving a drive signal, and control means for supplying, in correspondence with the information to be displayed, the drive signal to the electrodes for realizing intermediate optical states. In order to omit reset pulses, which cause a temporary blanking of the display device, the electrophoretic medium of the display device comprises two groups of electrophoretic particles, one group of positively charged electrophoretic particles (14) and one group of negatively charged particles (14′) and the color of the electrophoretic particles of the first group is equal to the color of the electrophoretic particles of the second group.

REFERENCES:
patent: 6462859 (2002-10-01), Bastiaens et al.
patent: 6538801 (2003-03-01), Jacobson et al.
patent: 6741385 (2004-05-01), Ikeda et al.
patent: 6822783 (2004-11-01), Matsuda et al.
patent: 2005/0012707 (2005-01-01), Liu

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