Reversible polarity LED lamp module using current regulator and method therefor
DCFirst Claim
1. A light emitting diode (LED) lamp module, comprising:
- a reverse polarity circuit having inputs coupled to first and second electrical contacts for receiving an input voltage and an output providing a power supply voltage having a polarity, the reverse polarity circuit accepting either a first polarity of the input voltage or a second polarity of the input voltage opposite to the first polarity and still providing the same polarity of the power supply voltage;
an electronic current regulator coupled for receiving the power supply voltage from the reverse polarity circuit and generating a selectable current regulated under load in response to a programming signal applied to a programming input of the electronic current regulator, the electronic current regulator including,(a) a control circuit having an input coupled for receiving the programming signal, and(b) a controllable current source having a control input coupled to an output of the control circuit and having an output for providing the selectable current regulated under load;
an LED matrix having an input coupled for receiving the selectable current from the electronic current regulator; and
a programming circuit providing the programming signal to the programming input of the electronic current regulator, the programming circuit including a first diode and resistor serially coupled between the first electrical contact and the programming input of the electronic current regulator.
1 Assignment
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Accused Products
Abstract
A lamp module has a base with first and second electrical contacts for inserting into a socket in alternate orientations. A printed circuit board is mounted to the base and has a reverse polarity circuit coupled to the first and second electrical contacts for converting a DC potential across the first and second electrical contacts to a power supply voltage. A current regulator has a first terminal receiving the DC power supply voltage from the reverse polarity circuit. A programming circuit provides a programming current to a second terminal of the current regulator to generate an output current in response to the programming current. An LED matrix is mounted to the base and has an input coupled for receiving the output current of the current regulator. The LED matrix has interconnected LEDs which emit a light intensity in response to the output current of the current regulator.
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Citations
23 Claims
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1. A light emitting diode (LED) lamp module, comprising:
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a reverse polarity circuit having inputs coupled to first and second electrical contacts for receiving an input voltage and an output providing a power supply voltage having a polarity, the reverse polarity circuit accepting either a first polarity of the input voltage or a second polarity of the input voltage opposite to the first polarity and still providing the same polarity of the power supply voltage; an electronic current regulator coupled for receiving the power supply voltage from the reverse polarity circuit and generating a selectable current regulated under load in response to a programming signal applied to a programming input of the electronic current regulator, the electronic current regulator including, (a) a control circuit having an input coupled for receiving the programming signal, and (b) a controllable current source having a control input coupled to an output of the control circuit and having an output for providing the selectable current regulated under load; an LED matrix having an input coupled for receiving the selectable current from the electronic current regulator; and a programming circuit providing the programming signal to the programming input of the electronic current regulator, the programming circuit including a first diode and resistor serially coupled between the first electrical contact and the programming input of the electronic current regulator. - View Dependent Claims (2, 3, 4, 5)
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6. A lamp module, comprising:
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a base having first and second electrical contacts adapted for inserting into a socket in alternate orientations; a printed circuit board mounted to the base, the printed circuit board including, (a) a reverse polarity circuit coupled to the first and second electrical contacts for converting an input voltage applied across the first and second electrical contacts to a power supply voltage, the reverse polarity circuit including a full-wave rectifier bridge having first and second inputs coupled to the first and second electrical contacts and an output for providing the power supply voltage, (b) a current regulator having a first terminal coupled for receiving the power supply voltage from the reverse polarity circuit and generating a selectable current regulated under load in response to a programming signal applied to a second terminal of the current regulator, and (c) a programming circuit providing the programming signal to the second terminal of the current regulator; and an LED matrix mounted to the base and having an input coupled for receiving the selectable current from the current regulator. - View Dependent Claims (7, 8, 9, 10)
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11. A light emitting diode (LED) lamp module having first and second electrical contacts, comprising:
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a current regulator having a first terminal coupled for receiving a power supply voltage and generating a selectable current regulated under load in response to a programming signal applied to a second terminal of the current regulator; a programming circuit providing the programming signal to the second terminal of the current regulator to generate the selectable current regulated under load; an LED matrix having an input coupled for receiving the selectable current from the current regulator; and a reverse polarity circuit having inputs coupled to the first and second electrical contacts for receiving an input voltage and an output providing the power supply voltage, the reverse polarity circuit accepting either a first polarity of the input voltage or a second polarity of the input voltage opposite to the first polarity and still providing the same polarity of the power supply voltage. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A light emitting diode (LED) lamp module, comprising:
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a reverse polarity circuit having inputs coupled to first and second electrical contacts for receiving an input voltage and an output providing a power supply voltage having a polarity, the reverse polarity circuit accepting either a first polarity of the input voltage or a second polarity of the input voltage opposite to the first polarity and still providing the same polarity of the power supply voltage; an electronic current regulator coupled for receiving the power supply voltage from the reverse polarity circuit and generating a selectable current regulated under load in response to a programming signal applied to a programming input of the electronic current regulator; an LED matrix having an input coupled for receiving the selectable current from the electronic current regulator; and a programming circuit providing the programming signal to the programming input of the electronic current regulator. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification