×

Electrophoretic display with single character erasure

  • US 5,223,115 A
  • Filed: 08/23/1991
  • Issued: 06/29/1993
  • Est. Priority Date: 05/13/1991
  • Status: Expired due to Fees
First Claim
Patent Images

1. An electrophoretic display comprising:

  • (a) a fluid-tight envelope having a portion thereof which is at least partially transparent;

    (b) an electrophoretic fluid contained within said envelope, said fluid having pigmented particles suspended therein;

    (c) a first plurality of elongated substantially parallel horizontal conductor members disposed within a first plane and contained within said envelope;

    (d) a first plurality of elongated substantially parallel vertical conductor members contained within said envelope electrically insulated from said horizontal members and disposed within a second plane, said first and said second planes being substantially parallel, said first plurality of horizontal members and said first plurality of vertical members forming a first matrix with a plurality of intersections when viewed along a line perpendicular to said first and said second planes;

    (e) a second plurality of elongated substantially parallel horizontal conductor members disposed within a third plane and contained within said envelope;

    (f) a second plurality of elongated substantially parallel vertical conductor members contained within said envelope electrically insulated from said second plurality of horizontal members and disposed within a fourth plane, said third and said fourth planes being substantially parallel, said second plurality of horizontal members and said second plurality of vertical members forming a second matrix with a plurality of intersections when viewed along a line perpendicular to said third and said fourth planes, said second and said third planes being substantially parallel, each of said vertical and horizontal members in said first and second matrices being selectively electrically chargeable to induce movement of said particles within said fluid, said particles being at least partially visible through said transparent portion of said envelope.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×