Light-emitting device using an organic thin-film electroluminescent light-emitting element
First Claim
1. A light-emitting device comprising:
- an organic electroluminescent light-emitting element;
a battery for supplying stored electrical power directly to the organic electroluminescent light-emitting element; and
a shared cathode layer forming both a cathode layer of the organic electroluminescent light-emitting element and at least one cathode activator layer of the battery;
whereinthe organic electroluminescent light-emitting element, the battery, and the shared cathode layer form a single body.
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Abstract
A light-emitting device using an organic EL element can be used in equipment demanding a small-scale and light-weight configuration. The light-emitting device includes an organic electroluminescent light-emitting element, a secondary battery such as a lithium battery and a shared cathode layer, which functions both as a cathode layer of the organic electroluminescent light-emitting element and as at least one cathode activator layer of the secondary battery. The organic electroluminescent light-emitting element and the secondary battery are provided in a single body manner via the shared cathode layer. The shared cathode layer comprises, for example, a metal having a work function of no greater than 4.3 eV.
78 Citations
12 Claims
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1. A light-emitting device comprising:
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an organic electroluminescent light-emitting element; a battery for supplying stored electrical power directly to the organic electroluminescent light-emitting element; and a shared cathode layer forming both a cathode layer of the organic electroluminescent light-emitting element and at least one cathode activator layer of the battery;
whereinthe organic electroluminescent light-emitting element, the battery, and the shared cathode layer form a single body. - View Dependent Claims (2, 3, 4, 5)
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6. A light-emitting device comprising:
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an organic electroluminescent light-emitting element; a lithium battery; and a shared cathode layer forming both a cathode layer of the organic electroluminescent light-emitting element and at least one cathode activator layer of the battery;
whereinthe organic electroluminescent light-emitting element, the battery, and the shared cathode layer form a single body.
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7. A light-emitting device comprising:
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an organic electroluminescent light-emitting element that comprises a transparent anode layer; a battery that comprises a plurality of unit cells in a multilayered arrangement; and a shared cathode layer forming both a cathode layer of the organic electroluminescent light-emitting element and at least one cathode activator layer of the battery; wherein the organic electroluminescent light-emitting element, the battery, and the shared cathode layer form a single body; and wherein light is emitted by electrically connecting a first anode terminal, extracted from an anode activator layer of an uppermost one of the unit cells, to a second anode terminal, extracted from the transparent anode layer. - View Dependent Claims (8)
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9. A light-emitting device comprising:
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an organic electroluminescent light-emitting element that comprises a transparent anode layer; a battery that comprises at least two unit cells, less than all of the unit cells being multilayered to form a first stack and the remaining unit cells being multilayered to form a second stack, an anode activator within each of the first and second stacks together constituting a shared anode layer; and a shared cathode layer forming both a cathode layer of the organic electroluminescent light-emitting element and at least one cathode activator layer of the battery; wherein a cathode activator within the first stack is the shared cathode layer, which is electrically connected to a cathode activator layer within the second stack; and wherein light is emitted by electrically connecting the shared anode layer to the transparent anode layer; and wherein the organic electroluminescent light-emitting element, the battery, and the shared cathode layer form a single body. - View Dependent Claims (10, 11)
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12. A light-emitting device comprising:
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an organic electroluminescent light-emitting element; a battery that constitutes the sole power source for the organic electroluminescent light-emitting element; and a shared cathode layer forming both a cathode layer of the organic electroluminescent light-emitting element and at least one cathode activator layer of the battery; wherein the organic electroluminescent light-emitting element, the battery, and the shared cathode layer form a single body.
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Specification