LED lamps
First Claim
Patent Images
1. An LED lamp for producing incoherent visible light comprising:
- an LED semiconductor structure comprising an n-layer and a p-layer overlying most of the n-layer;
first and second terminals; and
a plurality of spaced conductors on said LED semiconductor structure, each for energizing an associated underlying portion of said n-layer, the associated underlying portion being electrically common to neighboring light-generating portions of the semiconductor structure that are on opposite sides of the spaced conductor;
said plurality of spaced conductors being connected to said first terminal; and
wherein a light-generating portion of the semiconductor structure extends continuously from a vicinity of one of said spaced conductors to a vicinity of another of said spaced conductors, andwherein, for each of said plurality of spaced conductors, there is an adjacent light-generating portion of the semiconductor structure that extends from one side of the spaced conductor to an opposite side of the spaced conductor, andwherein, for each of at least two of said plurality of spaced conductors, p-layer parts of neighboring light generating portions of the semiconductor structure that are on opposite sides of the spaced conductor are connected to said second terminal.
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Abstract
A high power LED lamp has a GaN chip placed over an AlGaInP chip. A reflector is placed between the two chips. Each of the chips has trenches diverting light for output. The chip pair can be arranged to produce white light having a spectral distribution in the red to blue region that is close to that of daylight. Also, the chip pair can be used to provide an RGB lamp or a red-amber-green traffic lamp. The active regions of both chips can be less than 50 microns away from a heat sink.
36 Citations
18 Claims
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1. An LED lamp for producing incoherent visible light comprising:
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an LED semiconductor structure comprising an n-layer and a p-layer overlying most of the n-layer; first and second terminals; and a plurality of spaced conductors on said LED semiconductor structure, each for energizing an associated underlying portion of said n-layer, the associated underlying portion being electrically common to neighboring light-generating portions of the semiconductor structure that are on opposite sides of the spaced conductor;
said plurality of spaced conductors being connected to said first terminal; andwherein a light-generating portion of the semiconductor structure extends continuously from a vicinity of one of said spaced conductors to a vicinity of another of said spaced conductors, and wherein, for each of said plurality of spaced conductors, there is an adjacent light-generating portion of the semiconductor structure that extends from one side of the spaced conductor to an opposite side of the spaced conductor, and wherein, for each of at least two of said plurality of spaced conductors, p-layer parts of neighboring light generating portions of the semiconductor structure that are on opposite sides of the spaced conductor are connected to said second terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An LED lamp for producing incoherent visible light comprising:
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an LED semiconductor structure comprising an n-layer and a p-layer overlying most of the n-layer; first and second terminals; a plurality of spaced conductors on said LED semiconductor structure, each for energizing an associated underlying portion of said n-layer, the associated underlying portion being electrically common to neighboring light-generating portions of the semiconductor structure that are on opposite sides of the spaced conductor;
more than one of said plurality of spaced conductors being connected to said first terminal; andwherein a first light-generating portion of the semiconductor structure lies between a pair of said spaced conductors, and wherein, for each of at least two of said plurality of spaced conductors, p-layer parts of neighboring light generating portions of the semiconductor structure that are on opposite sides of the spaced conductor are connected to said second terminal, and wherein the semiconductor structure has a first group of light generating portions that are connected in parallel, and a second ground of light generating portions that are connected in parallel, said first group connected in series with said second group. - View Dependent Claims (11, 12)
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13. An LED lamp for producing incoherent visible light comprising:
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an LED semiconductor structure comprising an n-layer and a p-layer overlying the n-layer; first and second terminals; and a plurality of spaced conductors on said LED semiconductor structure, each of said plurality of spaced conductors being configured to energize an associated underlying portion of said n-layer, the associated underlying portion being electrically common to neighboring light-generating portions of the semiconductor structure, said plurality of spaced conductors being connected to said first terminal, wherein a light-generating portion of the semiconductor structure extends continuously from a vicinity of one conductor of said spaced conductors to a vicinity of another conductor of said spaced conductors, wherein, for said one conductor, there is an adjacent light-generating portion of the semiconductor structure that extends from one side of said one conductor to an opposite side of said one conductor, and wherein, for said one conductor, p-layer parts of neighboring light generating portions of the semiconductor structure that are on opposite sides of said one conductor are connected to said second terminal.
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14. An LED lamp comprising:
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an LED semiconductor structure comprising an n-layer and a p-layer overlying the n-layer; a first terminal; a second terminal; a plurality of n-layer conductors connected to said first terminal, said plurality of n-layer conductors extending along said n-layer to define a plurality of light emitting element areas; and a plurality of p-layer conductors connected to said second terminal, said plurality of p-layer conductors extending along said p-layer, wherein a first light emitting element area is provided with a first n-layer conductor extending along a side thereof and a second n-layer conductor extending along an opposite side thereof, wherein said first n-layer conductor is provided along a boundary between said first light emitting element area and a directly adjacent second light emitting element area provided on an opposite side of said first n-layer conductor from said first light emitting element area; and wherein a light-generating portion of said first light emitting element area extends continuously from a vicinity of said first n-layer conductor to a vicinity of said second n-layer conductor. - View Dependent Claims (15, 16, 17, 18)
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Specification