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Title: Organic electroluminescent devices and method for improving energy efficiency and optical stability thereof

Abstract

An organic electroluminescent device ("OELD") has a controllable brightness, an improved energy efficiency, and stable optical output at low brightness. The OELD is activated with a series of voltage pulses, each of which has a maximum voltage value that corresponds to the maximum power efficiency when the OELD is activated. The frequency of the pulses, or the duty cycle, or both are chosen to provide the desired average brightness.

Inventors:
Issue Date:
Research Org.:
GE Global Research, Niskayuna, New York (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1174827
Patent Number(s):
6727660
Application Number:
10/400,859
Assignee:
General Electric Company (Niskayuna, NY)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02B - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES
DOE Contract Number:  
FC26-00NT40989
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION

Citation Formats

Heller, Christian Maria. Organic electroluminescent devices and method for improving energy efficiency and optical stability thereof. United States: N. p., 2004. Web.
Heller, Christian Maria. Organic electroluminescent devices and method for improving energy efficiency and optical stability thereof. United States.
Heller, Christian Maria. Tue . "Organic electroluminescent devices and method for improving energy efficiency and optical stability thereof". United States. https://www.osti.gov/servlets/purl/1174827.
@article{osti_1174827,
title = {Organic electroluminescent devices and method for improving energy efficiency and optical stability thereof},
author = {Heller, Christian Maria},
abstractNote = {An organic electroluminescent device ("OELD") has a controllable brightness, an improved energy efficiency, and stable optical output at low brightness. The OELD is activated with a series of voltage pulses, each of which has a maximum voltage value that corresponds to the maximum power efficiency when the OELD is activated. The frequency of the pulses, or the duty cycle, or both are chosen to provide the desired average brightness.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2004},
month = {4}
}

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Works referenced in this record:

Efficient blue LEDs from a partially conjugated Si-containing PPV copolymer in a double-layer configuration
journal, February 1997


Multilayer White Light-Emitting Organic Electroluminescent Device
journal, March 1995


Organic electroluminescent devices based on molecularly doped polymers
journal, August 1992


High brightness and efficiency blue light-emitting polymer diodes
journal, August 1998


Near-ultraviolet electroluminescence from polysilanes
journal, October 1998