Flash apparatus, image capture apparatus having a flash apparatus, and method of controlling a flash apparatus
AssigneeCanon Kabushiki Kaisha
InventorKei Tohyama
Life of this patent
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Abstract
A flash apparatus or an image capture apparatus includes a charging unit, configured to boost a voltage of an electric source and a control unit, configured to calculate the sum of the light emission amount within a predetermined period of time. The control unit reduces the temperature rise of components which generate heat due to the continuous light emission when the sum of the light emission amount reaches a predetermined value.
Claims24
A flash apparatus comprising:
- a charging unit configured to boost a voltage of an electric source, wherein the boost in voltage of the electric source charges a capacitor which is used for supplying a light emission energy to a discharge tube;
- a light emission amount obtaining unit configured to obtain a light emission amount;
- and
- a control unit configured to calculate the sum of the light emission amount within a predetermined period of time based on an output of the light emission amount obtaining unit.
A flash apparatus comprising:
- a charging unit configured to boost a voltage of an electric source, wherein the boost in voltage of the electric source charges a capacitor which is used for supplying a light emission energy to a discharge tube;
- a light emission amount obtaining unit configured to obtain a light emission amount;
- and
- a control unit configured to calculate the number of times the light emission is equal to or greater than or equal to a predetermined light emission amount, within a predetermined period of time, and wherein the predetermined light emission amount is based on an output of the light emission amount obtaining unit.
An image capture apparatus having a flash apparatus comprising:
- a charging unit configured to boost a voltage of an electric source, wherein the voltage boost of the electric source charges a capacitor for supplying a light emission energy to a discharge tube;
- a light emission amount obtaining unit configured to obtain a light emission amount;
- and
- a control unit configured to calculate the sum of the light emission amount within a predetermined period of time based on an output of the light emission amount obtaining unit.
An image capture apparatus comprising:
- a charging unit configured to boost a voltage of an electric source, wherein the boost in voltage of the electric source charges a capacitor for supplying a light emission energy to a discharge tube;
- a light emission amount obtaining unit configured to obtain a light emission amount;
- and
- a control unit configured to calculate the number of times light emission is greater than or equal to a predetermined light emission amount, within a predetermined period of time, based on an output of the light emission amount obtaining unit.
A method of controlling a flash apparatus having a charging unit configured to boost a voltage of an electric source in order to charge a capacitor for supplying a light emission energy to a discharge tube, comprising the steps of:
- obtaining a light emission amount;
- calculating the sum of the light emission amount within a predetermined period of time based on the obtained light emission amount;
- and
- reducing the temperature rise of a component due to heat generated by continuous flash light emission, where the sum of the light emission amount reaches a predetermined value.
A method of controlling a flash apparatus having a charging unit configured to boost a voltage of an electric source in order to charge a capacitor for supplying a light emission energy to a discharge tube, comprising the steps of:
- obtaining a light emission amount;
- calculating the number of times light emission is greater than or equal to a predetermined light emission amount within a predetermined period of time, based on the obtained light emission amount;
- and
- reducing the temperature rise of a component due to heat generated by continuous flash light emission, where the number of times of light emission calculated is greater than or equal to a predetermined number of times.
Dependencies are inferred from the claim text.