US 12,347,307 B2
Remote control for flash device
Mazda Imani, Sunbyberg (SE); Mathias Nord, Sollentuna (SE); Anton Falk, Huddinge (SE); Göran Maren, Vendelsö (SE); and Emanuel Schütt, Farsta (SE)
Assigned to Profoto Aktiebolag, Sundbyberg (SE)
Filed by Profoto Aktiebolag, Sundbyberg (SE)
Filed on Jun. 13, 2023, as Appl. No. 18/334,027.
Claims priority of application No. 2250750-3 (SE), filed on Jun. 20, 2022.
Prior Publication US 2023/0410640 A1, Dec. 21, 2023
Int. Cl. G08C 17/02 (2006.01); G03B 15/05 (2021.01); H05B 47/19 (2020.01)
CPC G08C 17/02 (2013.01) [G03B 15/05 (2013.01); H05B 47/19 (2020.01); G03B 2215/0546 (2013.01); G03B 2215/0557 (2013.01); G08C 2201/93 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A remote control for controlling at least one group of flash devices for photography, the remote controller comprising:
a display,
wherein the remote control is configured:
to send, after receiving a trigger signal TC from a camera, a wireless pre-flash trigger signal, TPF, to the flash devices for initiating a pre-flash (PF) from the flash devices, wherein each flash device has a preset pre-flash strength, EPF, and the sum of all pre-flash strengths, EPF, corresponds to a total pre-flash strength ETPF, and
to receive from the camera, after sending the pre-flash trigger signal, TPF, a flash adjustment value, VA, corresponding to the exponent in the relationship
EDMF=ETPF·XVA,
wherein EDMF is a desired sum of main flash strengths from the flash devices, and X is a predetermined factor,
to determine a main flash strength value, VMF, based on a pre-flash strength value, VPF, stored in the remote control, the flash adjustment value VA, and a predetermined relationship between the pre-flash strength value, VPF, the flash adjustment value, VA, and the main flash strength value, VMF,
to display the main flash strength value, VMF, on the display,
to send a wireless control signal, SC, to each flash device for adjustment of the flash strength from each flash device at least according to the flash adjustment value, VA, and
to send a wireless main flash trigger signal, TMF, to the flash devices, for initiating a main flash, MF, with the adjusted flash strength, from each flash device.