Light emitting device with a plurality of circuits connected in parallel
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorRyoji Nomura
Life of this patent
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Abstract
It is an object of the present invention to provide a light emitting device which is less affected by a malfunction caused in a light emitting element. It is another object of the invention to provide a light emitting device in which light emitting elements are connected in series. As to a light emitting device of the invention, groups of circuits each having a light emitting element and a limiter are connected in parallel. Here, a light emitting element and a limiter are connected in series. The number of the circuits may be at least two or more. Further, each circuit group includes at least one light emitting element.
Claims9
A lighting device comprising:
- a plurality of circuits connected in parallel with each other, each of the plurality of circuits comprising:
- at least a first light emitting element and a second light emitting element which are connected in series, each comprises:
- a first electrode over a substrate;
- a light emitting layer over the first electrode;
- and
- a second electrode over the light emitting layer;
- wherein the first electrodes of the plurality of circuits are spaced from each other,
- wherein the second electrodes of the plurality of circuits are spaced from each other, and
- wherein the light emitting layer of the first light emitting element of the plurality of circuits is continuous to the light emitting layer of an adjacent one of the first light emitting element of the plurality of circuits.
A lighting device comprising:
- a plurality of circuits connected in parallel with each other, each of the plurality of circuits comprising:
- at least a first light emitting element and a second light emitting element which are connected in series, each comprises:
- a first electrode over a substrate;
- a light emitting layer over the first electrode;
- and
- a second electrode over the light emitting layer;
- wherein the second electrodes of the plurality of circuits are spaced from each other, and
- wherein the light emitting layer of the first light emitting element of the plurality of circuits is continuous to the light emitting layer of an adjacent one of the first light emitting element of the plurality of circuits.
A lighting device comprising:
- a plurality of circuits connected in parallel with each other, each of the plurality of circuits comprising at least one light emitting element which comprises:
- a first electrode over a substrate;
- a light emitting layer over the first electrode;
- and
- a second electrode over the light emitting layer;
- wherein the first electrodes of the plurality of circuits are spaced from each other,
- wherein the second electrodes of the plurality of circuits are spaced from each other, and
- wherein the light emitting layer of the light emitting element of the plurality of circuits is continuous to the light emitting layer of an adjacent one of the light emitting element of the plurality of circuits.
Dependencies are inferred from the claim text.