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US 9,326,365 B2Granted
Circuit for flash lamp
AssigneeXenon Corporation
InventorsRezaoul Karim, Saad Ahmed
Life of this patent
Estimating the term…
Abstract
A circuit for a gas discharge system includes a pulse forming circuit, a discharge lamp, a circuit for recovering energy from the discharge lamp when a trigger to the lamp is turned off, a high voltage switch between the lamp and ground, and a two-part dissipating circuit across the switch. The system can provide a flat response with highly controllable pulse width.
Claims21
A pulsed lamp system comprising:
- a pulsed gas discharge lamp for connection to a power source, the pulsed gas discharge lamp enclosing a gas that, when triggered, ionizes and conducts a high energy pulse;
- a switch coupled between the pulsed gas discharge lamp and ground;
- and
- a microcontroller for:
- (a) closing the switch,
- (b) after a desired time, triggering the turning on a trigger for the pulsed gas discharge lamp, and
- (c) after the trigger and after a desired pulse width time to deliver a pulse with high energy, opening the switch,
- wherein the microcontroller is configured to monitor a current level of the pulsed gas discharge lamp and, in response to the monitoring, causes the switch to open at a predetermined time after sensing an increase of the current level.
5 more elements
A system comprising:
- a pulsed gas discharge lamp for connection to a power source, the pulsed gas discharge lamp enclosing a gas that, when triggered, ionizes and conducts a high energy pulse;
- a pulse forming circuit coupled between the power source and the pulsed gas discharge lamp;
- a switch coupled between the pulsed gas discharge lamp and ground;
- and
- an RC circuit in parallel with the pulsed gas discharge lamp, the RC circuit including a capacitor that absorbs inductive current when the switch is opened after the pulsed gas discharge lamp has been discharging, wherein the pulse forming circuit includes capacitors and the pulse forming circuit and the RC circuit are each configured to store unused energy when the switch is opened and the capacitors are not fully discharged.
2 more elements
A system comprising:
- a pulsed gas discharge lamp for connection to a power source, the pulsed gas discharge lamp enclosing a gas that, when triggered, ionizes and conducts a high energy pulse;
- a pulse forming circuit coupled between the power source and the pulsed gas discharge lamp;
- a switch coupled between the pulsed gas discharge lamp and ground;
- a protection circuit coupled with the switch and including:
- a first capacitor coupled in parallel with the switch, wherein the first capacitor dissipates energy when the switch is opened after the pulsed gas discharge lamp has been discharging;
- and
- a second capacitor coupled in parallel with the switch, and a diode coupled between the switch and the second capacitor, wherein the diode permits current to flow through the second capacitor after the diode turns on and the second capacitor thereby discharges energy when the switch is open after the pulsed gas discharge lamp has been discharging.
4 more elements
Dependencies are inferred from the claim text.