Determination of starting time for flash emitted from flash tube
AssigneeProfoto AB
InventorsJohnny Svensson, Carl Johan Gurbbström
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Abstract
The invention discloses a method for determining a starting time for a flash emitted from a flash tube of a flash apparatus. The flash apparatus comprises a triggering circuit, and a drive circuit. The method comprises the steps of measuring an electric current through and/or a voltage across an electrical component of the drive circuit, and determining the starting time for the flash based on the measured electric current and/or voltage.
Claims15
A method for determining a starting time (ts0) for a flash emitted from a flash tube of a flash apparatus comprising a triggering circuit, and a drive circuit, the method comprising:
- measuring a voltage across an inductor of the drive circuit, and
- determining the starting time (ts0) for the flash based on the measured voltage,
- wherein the inductor connected in series with the flash tube.
A method for determining a starting time (ts0) for a flash emitted from a flash tube of a flash apparatus comprising a triggering circuit, and a drive circuit, the method comprising:
- measuring an electric current through and/or a voltage across an electrical component of the drive circuit,
- determining the starting time (ts0) for the flash based on the measured electric current and/or voltage,
- determining an electric current in the drive circuit from the measured current and/or voltage,
- comparing the determined electric current with a reference value, and
- determining the starting time (ts0) for the flash based on the comparison.
A flash apparatus comprising a triggering circuit, and a drive circuit, the flash apparatus comprising:
- a sensor configured to measure a voltage across an inductor of the drive circuit, and
- a control unit that is configured to determine a starting time (ts0) for the flash based on the measured voltage,
- wherein the inductor is configured to be connected in series with a flash tube during use of the flash apparatus.
A flash apparatus comprising a triggering circuit, and a drive circuit, the flash apparatus comprising:
- a sensor configured to measure an electric current through and/or a voltage across an electrical component of the drive circuit, and
- a control unit that is configured to determine a starting time (ts0) for the flash based on the measured voltage,
- wherein the control unit is configured to determine an electric current in the drive circuit from the measured current and/or voltage, compare the determined electric current with a reference value, and determine the starting time (ts0) for the flash based on the comparison.
Dependencies are inferred from the claim text.