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公开(公告)号：US10785835B2
公开(公告)日：2020-09-22
申请号：US16504181
申请日：2019-07-05
Applicant: PROFOTO AB
Inventor： Anton Falk , Michael Sundkvist
Abstract: The present disclosure relates to a flash generator for providing power supply to a flash tube so that the flash tube rapidly provides a light output adapted to FP-sync, Flat Peak. The flash generator comprises a capacitor bank, an output and a switch configured to switch a current flow from the capacitor bank via the output to provide a variable power via the output. The flash generator further comprises a controller for controlling the switch, whereby by controlling the on time of the switch, the generator is operative to provide, during a time period of 100 to 2000 μs during a peak time period within the time period, an average power at least 4 times higher than the average power provided during the other time period within the time period, whereby the flash tube during the peak time period becomes fully ignited.
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公开(公告)号：US20200008286A1
公开(公告)日：2020-01-02
申请号：US16504181
申请日：2019-07-05
Applicant: PROFOTO AB
Inventor： Anton Falk , Michael Sundkvist
Abstract: The present disclosure relates to a flash generator for providing power supply to a flash tube so that the flash tube rapidly provides a light output adapted to FP-sync, Flat Peak. The flash generator comprises a capacitor bank, an output and a switch configured to switch a current flow from the capacitor bank via the output to provide a variable power via the output. The flash generator further comprises a controller for controlling the switch, whereby by controlling the on time of the switch, the generator is operative to provide, during a time period of 100 to 2000 μs during a peak time period within the time period, an average power at least 4 times higher than the average power provided during the other time period within the time period, whereby the flash tube during the peak time period becomes fully ignited.
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公开(公告)号：US10674575B2
公开(公告)日：2020-06-02
申请号：US16331517
申请日：2017-09-05
Applicant: PROFOTO AB
Inventor： Johnny Svensson , Carl Johan Gurbbström
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.
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公开(公告)号：US20190208611A1
公开(公告)日：2019-07-04
申请号：US16331517
申请日：2017-09-05
Applicant: PROFOTO AB
Inventor： Johnny Svensson , Carl Johan Grubbström
IPC: H05B41/38 , G01R19/175 , H05B41/30
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.
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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
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.
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Patent Agency Ranking
公开(公告)号：US20170311428A1
公开(公告)日：2017-10-26
申请号：US15500507
申请日：2015-10-26
Applicant: PROFOTO AB
Inventor： Anton Falk , Michael Sundkvist
Abstract: The present disclosure relates to a flash generator for providing power supply to a flash tube so that the flash tube rapidly provides a light output adapted to FP-sync, Flat Peak. The flash generator comprises a capacitor bank, an output and a switch configured to switch a current flow from the capacitor bank via the output to provide a variable power via the output. The flash generator further comprises a controller for controlling the switch, whereby by controlling the on time of the switch, the generator is operative to provide, during a time period of 100 to 2000 μs during a peak time period within the time period, an average power at least 4 times higher than the average power provided during the other time period within the time period, whereby the flash tube during the peak time period becomes fully ignited.
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公开(公告)号：US20150373818A1
公开(公告)日：2015-12-24
申请号：US14766965
申请日：2014-02-11
Applicant: PROFOTO AB
Inventor： Anders Otterberg
Abstract: The present invention relates to a driver circuit for a flash tube. The driver circuit comprises a first and a second output for an electronic flash tube, a capacitor, an inductor and a switch. The inductor and the switch being connected in series with the first and a second output across the capacitor. A component which only allows current flow in one direction connected across the first and the second output and the inductor, with a polarity opposite to a direction of energy supply from the capacitor to the first output. The driver circuit further comprises a controller for controlling the switch. The controller comprises receiving means for receiving parameters related to desired flash characteristics. The controller being configured to control said switch based on said parameters to obtain said desired flash characteristics.
Abstract translation: 本发明涉及一种用于闪光管的驱动电路。 驱动器电路包括用于电子闪光管，电容器，电感器和开关的第一和第二输出。 电感器和开关与电容器的第一和第二输出端串联连接。 仅允许电流在连接在第一和第二输出端和电感器上的一个方向上的电流流动，其极性与从电容器向第一输出端的能量供应方向相反。 驱动器电路还包括用于控制开关的控制器。 控制器包括用于接收与期望的闪光特性相关的参数的接收装置。 控制器被配置为基于所述参数来控制所述开关以获得所需的闪光特性。
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公开(公告)号：US10602594B2
公开(公告)日：2020-03-24
申请号：US16331519
申请日：2017-09-05
Applicant: PROFOTO AB
Inventor： Johnny Svensson , Carl Johan Grubbström
Abstract: The invention discloses a drive circuit and a method for controlling a drive circuit for a flash tube. The drive circuit comprises a capacitor and a first inductor switch group comprising a first inductor and at least one first switch connected in series with each other. The first inductor switch group is configured to be connected in series with the flash tube and the capacitor. The drive unit further comprises at least a second inductor switch group comprising a second inductor and at least one second switch connected in series with each other and configured to be connected in series with the flash tube and the capacitor, and in parallel with the first inductor switch group. The method further comprises the steps of receiving input parameters related to a desired flash characteristics, and controlling the first and second switches separately based on the received input parameters to obtain the desired flash characteristics.
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公开(公告)号：US10375315B2
公开(公告)日：2019-08-06
申请号：US16031991
申请日：2018-07-10
Applicant: PROFOTO AB
Inventor： Anton Falk
Abstract: The present invention generally relates to the field of communication between electronic devices used for photography. In particular, the invention relates to a method, transmission unit, system and computer program for wireless communication between a camera and at least one remote flash device, such as photoflash units and related equipment. More in particular, the invention provides a way of controlling a plurality of flash devices from an intermediate radio transmission unit mountable on the camera, and utilized a delay a sequence flash control sequence so as to synchronize the function of the camera and the remote flash devices during image acquisition. Further the invention provides a way of controlling in the photoflash units settings for the main flash, wherein the setting are the last settings determined by the camera when the intermediate radio transmission unit was in a TTL-mode.
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公开(公告)号：US10349504B2
公开(公告)日：2019-07-09
申请号：US15500507
申请日：2015-10-26
Applicant: PROFOTO AB
Inventor： Anton Falk , Michael Sundkvist
Abstract: The present disclosure relates to a flash generator for providing power supply to a flash tube so that the flash tube rapidly provides a light output adapted to FP-sync, Flat Peak. The flash generator comprises a capacitor bank, an output and a switch configured to switch a current flow from the capacitor bank via the output to provide a variable power via the output. The flash generator further comprises a controller for controlling the switch, whereby by controlling the on time of the switch, the generator is operative to provide, during a time period of 100 to 2000 μs during a peak time period within the time period, an average power at least 4 times higher than the average power provided during the other time period within the time period, whereby the flash tube during the peak time period becomes fully ignited.
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