Driving a lighting device
First Claim
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1. A system for driving a lighting device comprising:
- a driving circuit for providing driving power for driving a lighting device including an anode and a cathode, the driving circuit comprising a voltage supply and a switching unit;
a lighting circuit comprising the lighting device, such that the anode is at ground potential of the driving circuit and the cathode is at a potential negative to the ground potential, and an inductance connected between the anode of the lighting device and the driving circuit; and
a decoupling unit for electrically decoupling the potential at the cathode from a positive potential of the driving circuit,wherein the switching unit is configured to selectively operate a driving current which flows through the decoupling unit, the inductance storing power when the switching unit is in an on-state and providing power to the lighting device when the switching unit is in an off-state, andwherein the anode is electrically coupled to a cooling unit via a slug directly mounted to the cooling unit to enhance thermal conductivity between the lighting device and the cooling unit.
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Abstract
Driving a lighting device by a driving circuit for providing driving power for driving a lighting device, and by a decoupling unit for electrically decoupling the driving circuit from a lighting circuit. The driving power is transferred at least partially from the driving circuit to the lighting circuit, and the lighting device is arranged within the lighting circuit such that its anode is at ground potential of the driving circuit.
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Citations
19 Claims
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1. A system for driving a lighting device comprising:
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a driving circuit for providing driving power for driving a lighting device including an anode and a cathode, the driving circuit comprising a voltage supply and a switching unit; a lighting circuit comprising the lighting device, such that the anode is at ground potential of the driving circuit and the cathode is at a potential negative to the ground potential, and an inductance connected between the anode of the lighting device and the driving circuit; and a decoupling unit for electrically decoupling the potential at the cathode from a positive potential of the driving circuit, wherein the switching unit is configured to selectively operate a driving current which flows through the decoupling unit, the inductance storing power when the switching unit is in an on-state and providing power to the lighting device when the switching unit is in an off-state, and wherein the anode is electrically coupled to a cooling unit via a slug directly mounted to the cooling unit to enhance thermal conductivity between the lighting device and the cooling unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system comprising:
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a driving circuit comprising a DC voltage supply having a negative pole connected to ground potential; a lighting circuit comprising; a lighting device having an anode connected to the ground potential and a cathode connected to a potential negative to the ground potential; a shunt resistance connected in series with the lighting device; and a capacitor connected in parallel with the series connected shunt resistance and lighting device; a decoupling unit comprising a decoupling diode having an anode connected to the cathode of the lighting device and a cathode connected to the driving circuit, and a coil connected between the cathode of the decoupling diode arid the ground potential, the decoupling unit electrically decoupling the cathode of the lighting device from a positive potential of the driving circuit; and a slug thermally coupled to a heat sink and configured to transfer heat from the light device, wherein the anode of the lighting device is electrically coupled to the heat sink via the slug, wherein the driving circuit provides power to the lighting circuit and the coil stores energy when the driving circuit is in an on-state. - View Dependent Claims (10)
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11. A system comprising:
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a driving circuit for providing driving power for driving a lighting device; a lighting circuit comprising; a lighting device having an anode connected to ground potential of the driving circuit; and a decoupling unit configured to electrically decouple the cathode of the lighting device from a positive potential of the driving circuit, the decoupling unit comprising a decoupling diode having an anode connected to the cathode of the lighting device and a cathode connected to the driving circuit; and a coil connected between the cathode of the decoupling diode and the ground potential; and a slug thermally coupled to a heat sink and configured to transfer heat from the light device, wherein the anode of the lighting device is electrically coupled to the heat sink via the slug. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A system comprising:
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a driving circuit comprising a DC voltage supply having a negative pole connected to ground potential; a lighting circuit comprising; a lighting device having an anode connected to the ground potential and a cathode connected to a potential negative to the ground potential; and an inductance connected in series with the anode of the lighting device, the inductance adapted to store energy for providing current to the lighting device; a transformer comprising first and second primary coils located in the driving circuit and a secondary coil located in the lighting circuit, the transformer electrically decoupling the cathode of the lighting device from a positive potential of the driving circuit; and a slug thermally coupled to a heat sink and configured to transfer heat from the light device, wherein the anode of the lighting device is electrically coupled to the heat sink via the slug. - View Dependent Claims (18, 19)
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Specification