Title:
【発明の名称】電界放出ディスプレイの輝度を制御する方法および装置
Document Type and Number:
Japanese Patent JP2001523016
Kind Code:
A
Abstract:
A method and apparatus to provide performance adjustments for FEDs during operation are provided. More specifically, the present invention provides two circuit embodiments for compensating for temperature induced brightness variations of the panel display. In a closed loop embodiment, a sample display circuit that is substantially similar to a FED being adjusted is used to generate a performance indicator signal which is compared against a reference signal to determine a difference signal. The difference signal is then used to adjust the operation performance of the FED as well as the sample display circuit. In an open loop embodiment, a current source generates a reference current across a sample resistor which is made from the same material as the resistor layer inside the FED's cathode. The voltage across the sample resistor is compared against a reference signal to determine a difference signal. The difference signal is then used to increase or decrease the brightness of the panel display, as needed, to compensate for temperature induced variations or other types of environment induced variations (e.g., humidity, aging, mild voltage drift that creates undesirable current drift, etc.) thereof.
Inventors:
Hansen, Ronald El.
Spints, Christopher Jay.
Spints, Christopher Jay.
Application Number:
JP2000519877A
Publication Date:
November 20, 2001
Filing Date:
July 23, 1998
Export Citation:
Assignee:
Candesant Technologies Corporation
International Classes:
G09G3/20; G09G3/22; (IPC1-7): G09G3/22; G09G3/20
Attorney, Agent or Firm:
Shoichi Monma