US Patent No. 10,798,793

STROBE DEVICE CAPABLE OF EMITTING ASSIST CONTINUOUS LIGHT, AND METHOD OF CONTROLLING SAME


Patent No. 10,798,793
Issue Date October 06, 2020
Title Strobe Device Capable Of Emitting Assist Continuous Light, And Method Of Controlling Same
Inventorship Azusa Sugawara, Yokohama (JP)
Assignee CANON KABUSHIKI KAISHA, Tokyo (JP)

Claim of US Patent No. 10,798,793

1. A strobe device for use with an external camera, including a flashlight emission section, and an assist continuous light section which emits an assist continuous light using first and second LEDs which emit lights different in color temperature from each other, respectively, comprising:at least one processor or circuit configured to perform the operations of the following units:
an adjustment unit configured to adjust a color temperature of the assist continuous light by either lighting one of the first and second LEDs or simultaneously lighting the first and second LEDs at an adjusted light amount ratio between the two LEDs;
a first determination unit configured to determine whether a lighting mode of the assist continuous light section is a still image pre-check mode or a moving image mode;
a color temperature acquisition unit configured to acquire a color temperature of an ambient light; and
a second determination unit configured to determine, in a case where it is determined by the first determination unit that the lighting mode is the still image pre-check mode, whether or not the color temperature is higher than a threshold value,
wherein the adjustment unit adjusts, in a case where it is determined by the second determination unit that the color temperature is higher than the threshold value, the light amount ratio such that a light amount of the first LED is larger than a light amount of the second LED, and
adjusts, in a case where it is determined by the second determination unit that the color temperature is not higher than the threshold value, the light amount ratio such that the light amount of the second LED is larger than the light amount of the first LED.