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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：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：US20140217884A1
公开(公告)日：2014-08-07
申请号：US14130866
申请日：2012-05-03
Applicant: Anton Falk , Ulf Carlsson
Inventor： Anton Falk , Ulf Carlsson
IPC: H01J11/28
CPC classification number: H01J11/28 , G03B15/05 , G03B2215/0575 , G03B2215/0578 , H01J61/547 , H01J61/90 , H05B41/32
Abstract: The present invention relates to the field of flash tubes for photographic use, in particular to a flash tube comprising a trigger element for triggering a flash in the flash tube. Accordingly, a flash tube is provided. The flash tube comprises a glass envelope enclosing a gas for use in a flash tube; a first electrode inside the glass envelope; a second electrode inside the glass envelope; and an electrically conductive trigger element being configured to receive a high voltage pulse for at least partly ionizing the gas inside the glass envelope in order to trigg a flash in said flash tube, wherein said electrically conductive trigger element extends along the glass envelope from a first point on the glass envelope adjacent to the first electrode to a second point on the glass envelope adjacent to the second electrode such that a single unified spark stream which bridges the first and second electrodes inside the glass envelope is formed in the at least partly ionized gas adjacent to said electrically conductive trigger element when said electrically conductive trigger element receives the high voltage pulse.
Abstract translation: 本发明涉及用于照相用途的闪光管的领域，特别涉及一种闪光管，其包括用于触发闪光管中的闪光的触发元件。 因此，提供闪光管。 闪光管包括封闭用于闪光管的气体的玻璃封套; 玻璃封套内的第一电极; 玻璃外壳内的第二电极; 以及导电触发器元件，其被配置为接收用于至少部分电离玻璃外壳内的气体的高电压脉冲，以便触发所述闪光管中的闪光，其中所述导电触发元件沿着玻璃封套从第一 指向与第一电极相邻的玻璃封套上的玻璃封套上的第二点，使与玻璃封套相邻的玻璃封套内的第一和第二电极桥接的单个统一的火花流形成在至少部分电离的气体 当所述导电触发元件接收高压脉冲时，与所述导电触发元件相邻。
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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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Patent Agency Ranking
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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公开(公告)号：US09420675B2
公开(公告)日：2016-08-16
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：US10197250B2
公开(公告)日：2019-02-05
申请号：US15525542
申请日：2015-10-28
Applicant: PROFOTO AB
Inventor： Pär Blixt , John Carrick
Abstract: A support ring is for mounting of a soft box on a light source. The support ring includes a connector for attachment of the support ring to the light source, and at least one cavity configured to receive support pins of the soft box. The cavity further includes a first and a second support element arranged to counteract a torque from the support pins, when the support pins are in an inserted position in the cavity. At least one entry element on a radial outside of the cavity is arranged to counteract a force required to bend the support pin to an angle where the support pin can be inserted into the cavity.
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