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

Patent ·
OSTI ID:1174827

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.

Research Organization:
GE Global Research, Niskayuna, New York (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
FC26-00NT40989
Assignee:
General Electric Company (Niskayuna, NY)
Patent Number(s):
6,727,660
Application Number:
10/400,859
OSTI ID:
1174827
Country of Publication:
United States
Language:
English

References (6)

Efficient blue LEDs from a partially conjugated Si-containing PPV copolymer in a double-layer configuration journal February 1997
Colorfast Blue-Light-Emitting Random Copolymers Derived from Di-n-hexylfluorene and Anthracene journal September 1998
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

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