Bipolar electroluminescent device
First Claim
Patent Images
1. A bipolar electroluminescent device comprising:
- a) an electroluminescent organic light-emitting material;
b) a first electrically insulating material contacting said electroluminescent organic light-emitting material;
c) a second electrically insulating material contacting said electroluminescent organic light-emitting material;
d) said electroluminescent organic light-emitting material, said first electrically insulating material and said second electrically insulating material positioned and of a thickness to emit light in both a forward and a reverse current direction;
e) a first electrode in electrical contact with said first electrically insulating material;
f) a second electrode in electrical contact with said second electrically insulating material, andg) connection means for electrically connecting said first electrode and said second electrode to a voltage source.
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Abstract
Light emitting bipolar devices consist of an electroluminescent organic light emitting material sandwiched between two layers of insulating material each of which is in contact with an electrode. The devices operate with AC voltage at voltages of less than twenty four volts and in some instances at less than five volts. Under AC driving, the device produces modulated light output that can be frequency or amplitude modulated. Under DC driving, the device operates in both forward and reverse bias.
98 Citations
47 Claims
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1. A bipolar electroluminescent device comprising:
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a) an electroluminescent organic light-emitting material; b) a first electrically insulating material contacting said electroluminescent organic light-emitting material; c) a second electrically insulating material contacting said electroluminescent organic light-emitting material; d) said electroluminescent organic light-emitting material, said first electrically insulating material and said second electrically insulating material positioned and of a thickness to emit light in both a forward and a reverse current direction; e) a first electrode in electrical contact with said first electrically insulating material; f) a second electrode in electrical contact with said second electrically insulating material, and g) connection means for electrically connecting said first electrode and said second electrode to a voltage source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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Specification