Lighting device that controls light emission while suppressing temperature rise, image pickup apparatus, and method of controlling lighting device
AssigneeCanon Kabushiki Kaisha
InventorKeiichiro Saito
Life of this patent
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Abstract
A lighting device capable of performing satisfactory light emission control while suppressing a rise in the temperature of the lighting device irrespective of the attachment of an optical accessory. In the lighting device, an accessory detection section detects whether or not an optical accessory for color adjustment or light distribution angle adjustment is attached to a light emission section, and light emission performed by the light emission section is limited based on a result of detection performed by the accessory detection section.
Claims19
A lighting device comprising:
- a light emission unit;
- a detection unit configured to detect whether or not an optical accessory for color adjustment or light distribution angle adjustment is attached to said light emission unit;
- and
- a control unit configured to limit light emission performed by said light emission unit based on a result of detection by said detection unit.
A lighting device comprising:
- a light source;
- a detection unit configured to detect that a specific optical accessory for changing characteristics of light irradiated from said light source is attached;
- and
- a suppression unit configured to perform processing for suppressing a temperature rise of the lighting device, based on a result of detection by said detection unit.
An image pickup apparatus including:
- an image pickup unit configured to perform image pickup of an object via an image pickup optical system to thereby obtain an image, and a lighting device,
- wherein said lighting device comprises:
- a light emission unit;
- a detection unit configured to detect whether or not an optical accessory for color adjustment or light distribution angle adjustment is attached to said light emission unit;
- and
- a control unit configured to limit light emission performed by said light emission unit based on a result of detection by said detection unit.
An image pickup apparatus including:
- an image pickup unit configured to perform image pickup of an object via an image pickup optical system to thereby obtain an image, and
- a lighting device,
- wherein said lighting device comprises:
- a light source;
- a detection unit configured to detect that a specific optical accessory for changing characteristics of light irradiated from said light source is attached;
- and
- a suppression unit configured to perform processing for suppressing a temperature rise of said lighting device, based on a result of detection by said detection unit.
A method of controlling a lighting device, comprising:
- detecting whether or not an optical accessory for color adjustment or light distribution angle adjustment is attached to a light emission unit, by a detection unit;
- and
- limiting light emission performed by the light emission unit based on a result of detection by the detection unit, by a control unit.
A method of controlling a lighting device, comprising:
- detecting that a specific optical accessory for changing characteristics of light irradiated from a light source is attached, by a detection unit;
- and
- performing processing for suppressing a temperature rise of the lighting device, based on a result of detection by the detection unit, by a suppression unit.
Dependencies are inferred from the claim text.