LED lighting using spectral notching
First Claim
1. A LED lighting apparatus comprising:
- a base including multiple electrical contacts;
a LED device including a submount, at least one LED arranged on or over the submount, and a lens arranged to transmit light emitted by the at least one LED, the LED device emitting visible light;
a body arranged between the base and the LED device;
a light-transmissive optical enclosure including an edge arranged proximate to the body, including a distal end arranged distal from the body, and defining an interior containing the LED device, wherein the optical enclosure is remotely located from the LED device, and the submount is arranged at an elevated position within the interior between the edge and the distal end,the LED lighting apparatus is embodied in a LED light bulb, wherein the optical enclosure is arranged along an external surface of the LED light bulb; and
the optical enclosure comprises a notch filtering material configured to receive at least some light generated by the LED device to cause emissions of the LED light bulb to exhibit a spectral notch with a portion of the visible spectrum after being affected by the notch filtering material.
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Accused Products
Abstract
LED lighting using optical elements with spectral notching is disclosed. Embodiments of the invention provide an optical element and LED devices and systems using such an optical element, where spectral notch filtering introduced by the optical element improves the color rendering index (CRI) of emitted light. In some embodiments of the invention, the optical element is made to act as a notch filter by including a rare earth compound such as neodymium oxide in or on the material of which the optical element is made. A color pigment can also be used to impart notch-filtering properties to an optical element. An optical interference film can also be used. The optical element may be included in an LED device such as a multichip component or may be used as an enclosure or reflector for an LED lighting system such as a lamp or fixture.
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Citations
61 Claims
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1. A LED lighting apparatus comprising:
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a base including multiple electrical contacts; a LED device including a submount, at least one LED arranged on or over the submount, and a lens arranged to transmit light emitted by the at least one LED, the LED device emitting visible light; a body arranged between the base and the LED device; a light-transmissive optical enclosure including an edge arranged proximate to the body, including a distal end arranged distal from the body, and defining an interior containing the LED device, wherein the optical enclosure is remotely located from the LED device, and the submount is arranged at an elevated position within the interior between the edge and the distal end, the LED lighting apparatus is embodied in a LED light bulb, wherein the optical enclosure is arranged along an external surface of the LED light bulb; and the optical enclosure comprises a notch filtering material configured to receive at least some light generated by the LED device to cause emissions of the LED light bulb to exhibit a spectral notch with a portion of the visible spectrum after being affected by the notch filtering material. - 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)
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40. A LED light bulb comprising:
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a base including multiple electrical contacts; a plurality of interconnected LED chips; an optical enclosure arranged along an external surface of the LED light bulb, wherein the optical enclosure is remotely located from the plurality of interconnected LED chips and defines an interior containing the plurality of interconnected LED chips; a circuit board including driver components arranged to supply power to the plurality of interconnected LED chips, wherein the driver components include at least one of a current control circuit, an energy storage element, a voltage control circuit, a rectifier circuit, and a current diversion circuit; and at least one lens arranged to cover each LED of the plurality of interconnected LED chips, the interior of the optical enclosure containing an optically transmissive fluid medium comprising a liquid that is thermally coupled to the plurality of interconnected LED chips, the at least one lens being arranged between the plurality of interconnected LED chips and the fluid medium, with the liquid remaining in a liquid state when the plurality of interconnected LED chips are operated to aid in cooling the plurality of interconnected LED chips; wherein the optical enclosure comprises a notch filtering material and is transmissive of at least a portion of light emitted by the plurality of interconnected LED chips while filtering the light to exhibit a spectral notch. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47)
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48. An LED lighting system comprising:
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an LED array operable to emit light when energized through an electrical connection; an optical element that filters the light to exhibit a spectral notch after being affected by the optical element; a power supply connected to the LED array through the electrical connection; and at least one lens arranged to cover each LED of the LED array; wherein the optical element comprises an optical enclosure containing an optically transmissive fluid medium comprising a liquid that is thermally coupled to the LED array, the at least one lens is arranged between the LED array and the fluid medium, and the liquid remains in a liquid state when the LED array is operated to aid in cooling LED chips of the LED array. - View Dependent Claims (49, 50, 51, 52, 53, 54, 55, 56)
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57. A LED lighting apparatus comprising:
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a plurality of LED packages arranged on a mounting surface in conductive thermal communication with at least one heatsink, each LED package of the plurality of LED packages including at least one LED and a lens arranged to transmit light emitted by the at least one LED, the LED packages emitting visible light; the LED lighting apparatus is embodied in a troffer-type LED ceiling fixture; and the at least one heatsink is arranged to dissipate heat to an environment proximate to the troffer-type LED ceiling fixture; wherein the LED lighting apparatus comprises at least one of the following features (a) or (b); (a) a reflector spatially separated from the plurality of LED packages, the reflector comprising a reflective material coated with a notch filtering material configured to receive at least some light generated by the plurality of LED packages to cause emissions of the troffer-type LED ceiling fixture to exhibit a spectral notch within a portion of the visible spectrum after being affected by the notch filtering material;
or(b) at least one lens plate spatially separated from the plurality of LED packages, the at least one lens plate comprising a light transmissive material and a notch filtering material configured to receive at least some light produced by the plurality of LED packages to cause emissions of the troffer-type LED ceiling fixture to exhibit a spectral notch within a portion of the visible spectrum after being affected by the notch filtering material. - View Dependent Claims (58, 59, 60, 61)
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Specification