Title: X-Y addressable electrophoretic display device with control electrode

Abstract: An electrophoretic display device in which an colloidal suspension of pigment particles is contained between a pair of electrodes, and means are provided in the structure of the electrodes of the cell for the establishment of a voltage threshold for the transport of pigment particles. This threshold permits the changing of the spatial distribution of pigment particles in specifically defined regions of the display cell.

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Inventors: Dalisa, Andrew L. (Yorktown Heights, NY, US)
Singer, Barry M. (New York, NY, US)

Application Number: 854117
Filing Date: 1977-11-23
Publication_date: 1980-05-13
Assignee: North American Philips Corporation (New York, NY)
Primary Class(es): 345/107 359/296
Other Classes:
US Patent Ref:

3892568	Jul, 1975	Ota	340/336.
3897137	Jul, 1975	Dobbins	350/362.
4046456	Sep, 1977	Bonne	350/362.
4071430	Jan, 1978	Liebert	350/362.

Other Refs:
Primary Examiner: Curtis, Marshall M.
Assistant Examiner:
Attorney: Briody; Thomas A., Oisher; Jack, Cannon, Jr.; James J.