Power supply having an auxiliary power stage for sustaining sufficient post ignition current in a DC lamp
AssigneeDelta Electronics, Inc.
InventorsYuequan Hu, Milan M. Jovanović
Life of this patent
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Abstract
The current invention provides a power supply that includes an igniter that generates an ignition voltage for igniting a DC lamp; an auxiliary power stage that outputs an auxiliary voltage for sustaining sufficient current in the DC lamp after the DC lamp is ignited; a voltage conversion stage coupled to the auxiliary power stage and generating a voltage at a level that is higher than the auxiliary voltage; and a switch that couples the auxiliary voltage to the DC lamp and the voltage conversion stage for a predefined period of time.
Claims20
A power supply for a DC lamp, comprising:
- an igniter that generates an ignition voltage for igniting the DC lamp;
- an auxiliary power stage that outputs an auxiliary voltage for sustaining sufficient current in the DC lamp after the DC lamp is ignited;
- a voltage conversion stage coupled to said auxiliary power stage, said voltage conversion stage generating an output voltage at a level that is higher than said auxiliary voltage;
- and
- a switch that couples the auxiliary voltage to the DC lamp for a predefined period of time after the DC lamp is ignited.
A power supply for a DC lamp, comprising:
- an auxiliary power stage that outputs an auxiliary voltage for sustaining sufficient current in the DC lamp after the DC lamp is ignited;
- a voltage conversion stage coupled to said auxiliary power stage, said voltage conversion stage generating an output voltage coupled in series with the auxiliary voltage to generate an igniter input voltage;
- a switch that couples the auxiliary voltage to the DC lamp for a predefined period of time after the DC lamp is ignited;
- and
- an igniter that generates an ignition voltage for igniting the DC lamp using the igniter input voltage.
A power supply for a DC lamp, comprising:
- an igniter that generates an ignition voltage for igniting the DC lamp;
- an auxiliary power stage that outputs an auxiliary voltage for sustaining sufficient current in the DC lamp after the DC lamp is ignited and outputs a second auxiliary voltage;
- a voltage conversion stage coupled to said auxiliary power stage and having an input receiving the second auxiliary voltage, said voltage conversion stage generating an output voltage from the second auxiliary voltage;
- and
- a switch that couples the auxiliary voltage to the DC lamp for a predefined period of time after the DC lamp is ignited.
Dependencies are inferred from the claim text.