Lamp with LED array and thermal coupling medium
First Claim
1. A lamp comprising:
- an optically transmissive enclosure;
an array of LEDs disposed in the enclosure on a wire frame assembly with substantially no additional mechanical support, the array of LEDs being operable to emit light when the wire frame assembly is energized;
at least one, sealed inner envelope around the array of LEDs;
a liquid and/or gel to provide thermal coupling to the array of LEDs, at least one portion of the liquid and/or gel confined to the at least one inner envelop and at least another portion of the liquid and/or gel between the at least one inner envelope and the optically transmissive enclosure; and
a phosphor suspended in either the liquid and/or gel confined to the at least one inner envelope or the liquid and/or gel between the at least one inner envelope and the optically transmissive enclosure.
3 Assignments
0 Petitions
Accused Products
Abstract
A lamp with an LED array is disclosed. The centralized nature of the LEDs allows the LEDs to be configured in a filament-like way using a supporting power structure, near the central portion of the optical envelope of the lamp. In example embodiments, the LEDs are cooled by a fluid medium to enable the LEDs to maintain appropriate mechanical stability and operating temperature. In some embodiments, the lamp operates at a power of at least 5 watts. Since the LED array can be centralized to form a filament-like structure, the light pattern from the lamp is not adversely affected by the presence of a heat sink or mechanical supporting parts. In some embodiments, phosphor is used provide wavelength conversion. The phosphor can be suspended within the optically transmissive fluid medium, placed remotely in the lamp structure, or applied to un-encapsulated LED die.
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Citations
22 Claims
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1. A lamp comprising:
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an optically transmissive enclosure; an array of LEDs disposed in the enclosure on a wire frame assembly with substantially no additional mechanical support, the array of LEDs being operable to emit light when the wire frame assembly is energized; at least one, sealed inner envelope around the array of LEDs; a liquid and/or gel to provide thermal coupling to the array of LEDs, at least one portion of the liquid and/or gel confined to the at least one inner envelop and at least another portion of the liquid and/or gel between the at least one inner envelope and the optically transmissive enclosure; and a phosphor suspended in either the liquid and/or gel confined to the at least one inner envelope or the liquid and/or gel between the at least one inner envelope and the optically transmissive enclosure. - View Dependent Claims (2, 3, 4, 5)
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6. A lamp comprising:
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an optically transmissive enclosure; an array of LEDs disposed in the enclosure on a wire frame assembly, the array of LEDs further comprising at least a first die and a second die, and a phosphor associated with at least one of the first die and the second die; at least one, sealed inner envelope around the array of LEDs; and an index matching medium contained in the enclosure to provide optical and thermal coupling to the array of LEDs; wherein the first die, if illuminated, would emit light having a dominant wavelength from 435 to 490 nm, and the second die, if illuminated, would emit light having a dominant wavelength from 600 to 640 nm, and wherein the phosphor, when excited, emits light having a dominant wavelength from 540 to 585 nm and the lamp, when the array of LEDs is energized through the wire frame assembly, operates at a power level of at least about 5 watts. - View Dependent Claims (7, 8, 9, 10)
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11. A method of making a lamp, the method comprising:
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providing an optically transmissive enclosure; centrally locating an array of LEDs in the enclosure on a wire frame assembly, the array of LEDs further comprising at least at least a first LED and a second LED, wherein the first LED, if illuminated, would emit light having a dominant wavelength from 435 to 490 nm, and the second LED, if illuminated, would emit light having a dominant wavelength from 600 to 640 nm; coating at least one of the first LED and the second LED with a phosphor wherein the phosphor, when excited, emits light having a dominant wavelength from 540 to 585 nm; providing at least one, sealed inner envelope around the array of LEDs; connecting the wire frame assembly so that the LEDs can be energized through the wire frame assembly to emit light; and placing an index matching medium in the enclosure so that the fluid medium provides optical and thermal coupling to the LEDs. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A lamp comprising:
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an optically transmissive enclosure; an array of LEDs disposed in the enclosure to be operable to emit light when the array of LEDs is energized, the array of LEDs further comprising at least a first die and a second die, and a phosphor associated with at least one of the first die and the second die; and a phase change material contained in the enclosure to provide optical coupling to the array of LEDs and/or the optically transmissive enclosure and thermal coupling to the array of LEDs by changing to a gas in a portion of the enclosure that surrounds the array of LEDs and returning to a liquid in a fluid reservoir; wherein the first die, if illuminated, would emit light having a dominant wavelength from 435 to 490 nm, and the second die, if illuminated, would emit light having a dominant wavelength from 600 to 640 nm, and wherein the phosphor, when excited, emits light having a dominant wavelength from 540 to 585 nm. - View Dependent Claims (20, 21, 22)
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Specification