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US 6,081,076 AGranted
Fill-in light emitting apparatus and still video camera
AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorKimiaki Ogawa
Life of this patent
Estimating the term…
Abstract
A fill-in light emitting apparatus having an illuminating mechanism for emitting illumination light whose color temperature can be varied; a color temperature metering mechanism for measuring the color temperature of the external light; and a color temperature controlling mechanism for varying the color temperature of the illumination light in accordance with color temperature data measured by the color temperature metering mechanism.
Claims21
A strobe emission apparatus, comprising:
- a strobe light emitter that sequentially emits strobe light at different color temperatures;
- a single charge accumulator that outputs an electric charge to the strobe emitter;
- a voltage detector that detects a terminal voltage of said single charge accumulator;
- a detector that measures an amount of light of an object to be photographed;
- a color temperature detector that measures a color temperature of ambient light;
- a first system controller that sets an emission ratio of said strobe light emitter so that a resultant color temperature of said strobe light emitter corresponds to said ambient light color temperature detected by said color temperature detector, said first system controller being arranged to control said strobe light emitter so as to maintain said emission ratio of said strobe light emitter;
- a second system controller that sets a maximum light emission amount defined by a predetermined threshold value where a first strobe light emission is controlled in order to enable subsequent strobe light emissions, thus obtaining a desired color temperature from a plurality of strobe light emissions having different color temperatures;
- and
- an emission controller that terminates an emission of said strobe light emitter when one of:
- (I) an amount of light measured by said detector reaches a predetermined value, and (ii) an emission of said strobe light emitter reaches said maximum light emission amount when said predetermined threshold value is detected;
- wherein the predetermined threshold value corresponds to the maximum light amount of the first emission from the strobe light emitter, and residual electric charge in the single charge accumulator drives subsequent emissions.
8 more elements
A strobe emission apparatus, comprising:
- means for sequentially emitting strobe light at different color temperatures;
- a single charge accumulator that outputs electric charges to said emitting means;
- means for detecting a terminal voltage of said single charge accumulator;
- first means for measuring an amount of light of an object to be photographed;
- second means for measuring a color temperature of ambient light;
- means for setting an emission ratio of said emitting means so that a resultant color temperature of said emitting means corresponds to said ambient light color temperature measured by said second measuring means, said setting means controlling said emitting means to maintain said emission ratio of said emitting means;
- means for setting a maximum light emission amount defined by a predetermined threshold value where a first strobe light emission is controlled in order to enable subsequent strobe light emissions, thus obtaining a desired color temperature from a plurality of strobe light emissions having different color temperatures;
- and
- means for terminating an emission of said strobe light emitter when one of:
- (I) an amount of light measured by said first measuring means reaches a predetermined value, and (ii) an emission of said emitting means reaches said maximum light emission amount when said predetermined threshold value is detected;
- wherein the predetermined threshold value corresponds to the maximum light amount of the first emission from the strobe light emitter and residual electric charge in the single charge accumulator drives subsequent emissions.
8 more elements
A strobe emission apparatus, comprising:
- a plurality of strobe emitters that emit strobe light at different color temperatures;
- a single charge accumulator that outputs electric charge to the plurality of strobe emitters;
- a detector that measures an amount of light of an object to be photographed;
- a first controller that sets an emission ratio of said plurality of strobe emitters so that a resultant color temperature of said plurality of strobe emitters correspond to an ambient light color temperature, said first controller controlling an emission of strobe light by said plurality of strobe emitters to maintain said emission ratio;
- a second controller that sets a maximum light emission amount defined by a predetermined threshold value where a first strobe light emission is controlled in order to enable subsequent strobe light emissions, thus obtaining a desired color temperature from a plurality of strobe light emissions having different color temperatures;
- and
- a terminating controller that terminates said emission of strobe light by said plurality of strobe light emitters when one of:
- (I) an amount of light measured by said detector reaches a predetermined value, and (ii) said emission of strobe light by said plurality of strobe emitters reaches said maximum light emission amount wherein the predetermined threshold value corresponds to the maximum light amount of the first emission from the strobe light emitter, and residual electric charge in the single charge accumulator drives subsequent emissions.
5 more elements
Dependencies are inferred from the claim text.