Electrode arrays for cellular displays

• US 4,741,604 A
• Filed: 02/01/1985
• Issued: 05/03/1988
• Est. Priority Date: 02/01/1985
• Status: Expired due to Fees

• Current Assignee: Cary D. Kornfeld
• Original Assignee: Cary D. Kornfeld
• Inventors: Kornfeld, Cary D.
• Primary Examiner(s): Arnold, Bruce Y.
• Application Number:
  US06/697,344
• Time in Patent Office: 1,187 Days
• Field of Search: 350/362, 350/332, 204/209, 340/713, 340/763, 340/783, 340/787, 340/805
• US Class Current: 359/296
• CPC Class Codes: G02F 1/167 by electrophoresis
• CPC Class Codes: G02F 1/1679 Gaskets; Spacers; Sealing of cells; Filling or closing of cells

Abstract

An electric flat panel display has a matrix of flat panel display cells and a fault tolerant driver circuit and an electrode array. A folded field drive scheme applies a periodic voltage signal to a common electrode. Opposing electrodes are set to one of two voltage states by voltage setting circuits.

Claims

1. A method for driving electrophoretic cellular display device comprising,

applying a periodic voltage signal to a common electrode of an electrophoretic cellular display device, said periodic voltage signal having a low voltage and a high voltage, and

setting each cell electrode of said display device to one of two cell state non-periodic DC voltages, one of said voltages being near the low voltage of said periodic voltage signal, the other of said voltages being near the high voltage of said periodic voltage signal.

2. The method of claim 1 wherein said low voltage is zero volts.

3. The method of claim 1 wherein said high voltage is at least fifteen volts.

4. The method of claim 1 wherein said periodic voltage signal is a square wave.