Patent ID: 6674247
Filing Date: 2004-01-06
Classification: H05B

Abstract:
A photographic flash, comprising:a flash tube filled with an ionizable gas; a photoflash capacitor connected to supply energy to said flash tube; a majority-carrier switching device, responsive to a control signal, connected to conduct current through said flash tube; a trigger circuit, responsive to a trigger signal, connected to said flash tube; and a controller configured to send said trigger signal to said trigger circuit thereby to cause said gas in said flash tube to ionize, and configured to send said control signal to said majority-carrier switching device thereby to allow a flow of a current through said flash tube, thereby to initiate a flash discharge, and further configured to turn on and turn off said majority-carrier switching device a plurality of times while said gas in said flash tube remains ionized, thereby to cause a plurality of flash discharges.