公开(公告)号：US20180109877A1

公开(公告)日：2018-04-19

申请号：US15555229

申请日：2016-02-25

Applicant: PROFOTO AB

Inventor： Anton FALK ,  Ulf CARLSSON

IPC: H04R5/04 ,  H04M1/60 ,  H04M1/725

CPC classification number: H04R5/04 ,  G03B7/26 ,  G03B15/02 ,  G03B15/05 ,  G03B2215/0557 ,  H04M1/6058 ,  H04M1/72527 ,  H05B41/32

Abstract: A flash generator is capable of identifying which type of flash head and flash head extension cables that is connected to the flash generator. A flash head and flash head extension cable can be identified by the flash generator. The flash generator provides a power supply to a flash head. Further the flash generator includes a first current generator for charging the capacitor. The flash generator further includes a second current generator or a voltage generator connected to an output of the flash generator and arranged to provide a current or a voltage to create a voltage UID over a component in a flash head or a flash head extension cable connected to the flash generator. Processing means are arranged to identify the flash head or the flash head extension cable by the measured voltage UID.

公开(公告)号：US20180052384A1

公开(公告)日：2018-02-22

申请号：US15555240

申请日：2016-02-25

Applicant: PROFOTO AB

Inventor： Anton FALK ,  Ulf CARLSSON ,  Carl Johan GRUBBSTRÖM

IPC: G03B15/05 ,  H01T1/22 ,  H01T1/24 ,  H05B41/32 ,  H01J11/28 ,  H01J61/54 ,  H01J61/90

CPC classification number: G03B15/05 ,  G03B2215/0575 ,  G03B2215/0578 ,  H01J1/30 ,  H01J11/28 ,  H01J61/0672 ,  H01J61/547 ,  H01J61/90 ,  H01T1/22 ,  H01T1/24 ,  H05B41/32

Abstract: Flash tubes for photographic use, in particular a flash tube is adapted to provide a light output adapted to FP-sync, Flat Peak. The flash tube includes a length of glass tubing enclosing a gas for use in the flash tube, a cathode inside a first end part of glass tubing and an anode inside a second end part of glass tubing. The cathode includes an element that helps to ionize the gas that is wound around the cathode, such that a spark stream starts from the upper part of the cathode and is prevented from spreading down wards on the cathode and changing the arc length during the light output adapted to FP-sync.