Solid state lighting apparatus and methods using integrated driver circuitry
First Claim
Patent Images
1. A lighting apparatus comprising:
- a first substrate comprising a first port, a second port, a switching circuit having at least one terminal, and a current control circuit configured to generate a current at the second port responsive to a varying voltage at the first port; and
a second substrate mounted on the first substrate and comprising at least two LEDs having first and second end nodes electrically coupled to the second port and at least one intermediate node coupled to the at least one terminal of the switching circuit.
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Abstract
A lighting apparatus includes a first substrate including a switching circuit, the switching circuit including a first port, a second port and a current control circuit configured to generate a current at the second port of the current control circuit responsive to a varying voltage at the first port. The apparatus further includes a second substrate mounted on the first substrate and including at least two LEDs electrically coupled to the second port of the current control circuit of the first substrate.
170 Citations
31 Claims
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1. A lighting apparatus comprising:
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a first substrate comprising a first port, a second port, a switching circuit having at least one terminal, and a current control circuit configured to generate a current at the second port responsive to a varying voltage at the first port; and a second substrate mounted on the first substrate and comprising at least two LEDs having first and second end nodes electrically coupled to the second port and at least one intermediate node coupled to the at least one terminal of the switching circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A device comprising:
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a submount configured to support an LED substrate and comprising a first port, a second port, a switching circuit having at least one terminal, and a current control circuit configured to generate a current at the second port responsive to a varying voltage at the first port; and a plurality of contacts on the submount, coupled to the second port and the at least one terminal of the switching circuit and configured to mate with corresponding contacts of the LED substrate. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A lighting apparatus comprising:
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at least two LEDs, a rectifier circuit, a current control circuit and a switching circuit integrated on a common substrate, the rectifier circuit comprising a first port configured to be coupled to an AC power source, the current control circuit comprising a second port coupled to first and second end nodes of the at least two LEDs configured to generate a current at the second port responsive to a varying voltage at the first port and the switching circuit coupled to intermediate nodes of the LED string and configured to selectively bypass LEDs in the string of LEDs and comprising; a buffer circuit coupled to an output of the rectifier circuit; a resistor ladder circuit coupled to an output of the buffer circuit; and a plurality of switches, respective ones of which have control inputs coupled to respective nodes of the resistor ladder circuit. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31)
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Specification