Electrophoretic display

• US 5,872,552 A
• Filed: 05/29/1997
• Issued: 02/16/1999
• Est. Priority Date: 12/28/1994
• Status: Expired due to Term

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: McKean, Dennis Richard, Homola, Andrew Marian, Schein, Lawrence Brian, Gordon, Joseph Grover II, Hart, Mark Whitney, Smith, Barton Allen, Swanson, Sally Ann
• Primary Examiner(s): BRIER, JEFFERY A
• Application Number:
  US08/864,806
• Time in Patent Office: 628 Days
• Field of Search: 345/48, 345/107, 359/296
• US Class Current: 345/107
• CPC Class Codes: G02F 1/167 by electrophoresis
• CPC Class Codes: G02F 1/1677 Structural association of cells with optical devices, e.g. reflectors or illuminating devices

Abstract

The invention relates to an ambient light electrophoretic display comprising a plurality of cells containing a suspension of charged pigment particles in a light-transmissive fluid. Each cell comprises a light-transmissive front window, a nonobstructing collecting electrode and counter electrode disposed in the cell, and a panel having a reflective or absorbing surface.

Claims

1. An electrophoretic cell for use in displays containing a suspension of charged pigment particles in a light-transmissive fluid, the cell comprising:

(a) a light-transmissive front window;

(b) a nonobstructing collecting electrode disposed at the side of the cell; and

(c) a pedestal shaped counter electrode.

2. An electrophoretic display comprising a plurality of cells containing a suspension of charged pigment particles in a light-transmissive fluid, each cell comprising:

(a) a light-transmissive front window;

(b) a nonobstructing collecting electrode disposed at the side of the cell;

(c) a pedestal shaped counter electrode; and

(d) rear panel.