High efficiency LEDs and LED lamps
First Claim
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1. A lighting system comprising:
- an electrically insulating carrier having a plurality of conductive elements disposed thereon; and
disposed over the carrier, a light-emitting array comprising a plurality of light-emitting strings, each light-emitting string comprising a plurality of light-emitting diodes (LEDs) electrically connected in series, each LED having at least two electrical contacts on one surface thereof, wherein each electrical contact is electrically connected to a conductive element by a conductive adhesive,wherein at least one LED comprises a light-conversion material.
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Abstract
The present invention relates to a light emitting device comprising a plurality of electrically coupled light emitting elements, wherein each light emitting element has a luminous efficacy vs. current characteristic, wherein said luminous efficacy vs. current characteristic has a maximum luminous efficacy value and wherein at least one of said light emitting devices is operated at a current corresponding to a luminous efficacy value that is within 10% of said maximum luminous efficacy value. The present invention also relates to methods of making said light emitting device, to lamps comprising said light emitting device and to methods of operating said light emitting device.
199 Citations
19 Claims
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1. A lighting system comprising:
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an electrically insulating carrier having a plurality of conductive elements disposed thereon; and disposed over the carrier, a light-emitting array comprising a plurality of light-emitting strings, each light-emitting string comprising a plurality of light-emitting diodes (LEDs) electrically connected in series, each LED having at least two electrical contacts on one surface thereof, wherein each electrical contact is electrically connected to a conductive element by a conductive adhesive, wherein at least one LED comprises a light-conversion material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification