Electrophoretic display device and driving means for...

Details Electrophoretic display device and driving means for... Electrophoretic display device and driving means for...

2006-10-24

2006-10-24

Spector, David N. (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C345S107000

Reexamination Certificate

active

07126743

ABSTRACT:
An electrophoretic display device (1) comprising one pixel (10) with an electrophoretic medium (13), electrodes (6, 7), as well as drive means (4) by which the pixels can be brought into different optical states. Some time (thold) after the application of an addressing pulse (Paddress) for setting the brightness level (Rw, Rb) of a pixel (10), a restore pulse voltage (Prestore) is applied between the electrodes (6,6′,7) for restoring the brightness level of a pixel to the set level (Rw, Rb). The restore pulse may be a set of consecutive pulses to bring the drifted brightness level even more smoothly (i.e. less perceivably) back to the original brightness level.

REFERENCES:
patent: 6842165 (2005-01-01), Inoue
patent: 2002/0036616 (2002-03-01), Inoue

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