Active matrix organic light emitting diode (amoled) display pixel structure and data load/illuminate circuit therefor

Patent 5952789 Issued on September 14, 1999. Estimated Expiration Date:

April 14, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

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Inventors

Assignee

Sarnoff Corporation

Application

No. 834067 filed on 04/14/1997

US Classes:

315/169.4, Gas display panel device315/169.1, Diverse-type energizing or bias supplies to different electrodes315/169.3, Electroluminescent device345/46, Light-emitting diodes345/76, Electroluminescent345/82Solid body light emitter (e.g., LED)

Examiners

Primary: Wong, Don
Assistant: Lee, Wilson

Attorney, Agent or Firm

Burke; William J.

International Class

G09G 003/10

Abstract

A pixel structure for use in a display using organic light emitting diodes (O-LEDs) is described. Each pixel structure of an overall array includes an organic light emitting diode (O-LED). Additionally, the structure includes circuitry for allowing the structure to operate in three basic modes: write select mode, write deselect mode and an illuminate mode. Hence, the structure includes circuitry for causing the pixel structure to be selected such that data can be written to the pixel structure, said data representative of a programmed current level to be applied to the O-LED; circuitry for causing the pixel structure to be deselected when a pixel structure in a different row is having data written thereto; and circuitry for applying the programmed current level to the OLED, causing the O-LED to illuminate.