lamp device and a method for operating a lamp device
First Claim
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1. A lamp device comprising:
- a lighting module including a first and a second terminal;
a first and a second pair of connection pins for connecting the lamp device to a lighting fixture, wherein a first connection pin of the second pair is connected to the second terminal;
a switch operable to connect a first pin of the first pair to the first terminal when closed; and
circuitry arranged to close the switch in response to a voltage difference between the pins of the first pair exceeding a first threshold voltage and a voltage difference between the pins of the second pair exceeding a second threshold voltage.
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Abstract
According to one embodiment there is provided a lamp device (1) having a lighting module (3) and two pairs of external connection pins (5aa, 5ab, 5ba, 5bb) for connecting the lamp device to a supply voltage of a lighting fixture. A first terminal of the lighting module is connected to a pin of a first pair of pins by a switch which is closed in response to a voltage difference between both the pins of the first pair of pins and the pins of the second pair of pins exceeding a respective threshold voltage. The lamp is therefore safe to handle even in a condition where one pair of pins is connected and the other is not.
29 Citations
15 Claims
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1. A lamp device comprising:
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a lighting module including a first and a second terminal; a first and a second pair of connection pins for connecting the lamp device to a lighting fixture, wherein a first connection pin of the second pair is connected to the second terminal; a switch operable to connect a first pin of the first pair to the first terminal when closed; and circuitry arranged to close the switch in response to a voltage difference between the pins of the first pair exceeding a first threshold voltage and a voltage difference between the pins of the second pair exceeding a second threshold voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of operating a lamp device comprising a lighting module including a first and a second terminal and a first and a second pair of connection pins for connecting the lamp device to a lighting fixture, wherein a first connection pin of the second pair of pins is connected to the second terminal the method comprising:
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monitoring a first voltage difference between the pins of the first pair and a second voltage difference between the pins of the second pair; and in response to the first voltage difference exceeding a first threshold voltage at a same time as the second voltage difference exceeding a second threshold voltage, connecting a first pin of the first pair of pins to the first terminal.
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Specification