Patent ID: 7545104
Filing Date: 2009-06-09
Classification: H05B

Abstract:
1. A control circuit for a flash discharge tube using a charge and discharge capacitor to supply electrical charges for light emission of said flash discharge tube including a positive electrode, a negative electrode and a trigger electrode, comprising: a surge circuit constituted by a first resistor and a diode connected in series, the diode being provided for surge current and the first resistor being provided for protection of the diode; and a light emission trigger circuit, directly connected to the trigger electrode, and connected to the surge circuit only via said flash discharge tube, for supplying a trigger voltage to the flash discharge tube; wherein said surge circuit is disposed between said negative electrode and positive electrode of said flash discharge tube and connected in parallel to the charge and discharge capacitor; and wherein the cathode side of The diode is connected to The positive electrode side of the flash discharge tube.