IMAGE DISPLAY DEVICE WITH MEMORY - NLT TECHNOLOGIES LTD

Title:

IMAGE DISPLAY DEVICE WITH MEMORY

Document Type and Number:

WIPO Patent Application WO/2013/114536

Kind Code:

A1

Abstract:

[Problem] To provide an image display device having improved image retention capability by analyzing the mechanism behind the creation of an unwanted electric field applied to an element after a power supply is turned off, and devising a drive method and so forth for compensating for the same. [Solution] Electrophoretic particles (41) contain three types of charged particles, C (cyan), M (magenta), and Y (yellow) that are mutually different in color and threshold voltage for starting electrophoresis. When the threshold voltages of C (cyan), M (magenta) and Y (yellow) are respectively Vth3, Vth2, and Vth3, these satisfy the relationship |Vth3| < |Vth2| < |Vth1|. Further, a voltage application unit applies a voltage (VE) different from a reference potential during the final period of image update period. The voltage (VE) is a compensation voltage that suppresses the movement of charged particles.

Inventors:

SAKAMOTO MICHIAKI (JP)
SHIGEMURA KOJI (JP)

Application Number:

PCT/JP2012/052000

Publication Date:

August 08, 2013

Filing Date:

January 30, 2012

Export Citation:

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Assignee:

NLT TECHNOLOGIES LTD (JP)
SAKAMOTO MICHIAKI (JP)
SHIGEMURA KOJI (JP)

International Classes:

G02F1/167

Foreign References:

JP2006133332A	2006-05-25
JP2010210899A	2010-09-24
US20090046052A1	2009-02-19
JP4049202B1	2008-02-20
JP4385438B2	2009-12-16
JP4269605B2	2009-05-27
JP2007316594A	2007-12-06
JP4811510B2	2011-11-09
JP4806634B2	2011-11-02
JP2005326883A	2005-11-24
JP2010210806A	2010-09-24
JP2010210660A	2010-09-24

Other References: