Camera flash control device and method thereof for preventing red-eye phenomenon
AssigneeSamsung Aerospace Industries, Ltd.
InventorsBon-Jeong Goo, Cha-Woon Choo
Life of this patent
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Abstract
A camera flash control device and method thereof for preventing red-eye phenomenon which can prevent red-eye phenomenon by controlling the amount of light and a number of times the light is emitted from a flash according to a distance measured from an object to a camera with a built-in flash. The camera flash control device comprises a first photographic mode selector, an automatic distance measuring circuit, a zoom position sensor, a second photographic mode selector, a micro-controller and a flash.
Claims15
A camera flash control device for preventing red-eye phenomenon, comprising:
- first photographic mode selecting means for selecting a red-eye phenomenon prevention emitting mode;
- automatic distance measuring means for measuring a distance from an object;
- zoom position sensing means for sensing a present zoom position of lenses;
- second photographic mode selecting means for selecting a red-eye phenomenon prevention photographic mode;
- control means for controlling a pre-emitting operation by outputting a flash driving signal according to a first set amount when the distance from the object is long and outputting a flash driving signal according to a second set amount when the distance from the object is short after determining whether the distance from the object measured according to the present zoom position of the lenses is long or short when the red-eye phenomenon prevention photographic mode is selected;
- and
- emitting means driven according to the flash driving signal outputted from the control means and for emitting a predetermined amount of light.
A method for preventing red-eye phenomenon, comprising the steps of:
- sensing a present zoom position of lenses when a red-eye phenomenon prevention photographic mode is selected;
- measuring a distance from an object and determining whether the measured distance from the object according to the sensed zoom position is long or short;
- emitting a predetermined amount of light by driving an emitting means according to a first set amount when the measured distance from the object is long;
- and
- emitting a predetermined amount of light by driving the emitting means according to a second set amount when the measured distance from the object is short.
A camera flash control device for preventing red-eye phenomenon, comprising:
- first photographic mode selecting means for selecting a red-eye phenomenon prevention emitting mode;
- automatic distance measuring means for measuring a distance from an object;
- zoom position sensing means for sensing a present zoom position of lenses;
- second photographic mode selecting means for selecting a red-eye phenomenon prevention photographic mode;
- control means for dividing a distance from the object according to a zoom position of the lenses into a plurality of regions, setting the amount of light and a number of times the light is emitted differently from one another at every region, and outputting a flash driving signal according to the amount of light and a number of times the light is emitted in the region corresponding to the measured distance from the object according to the present zoom position when the red-eye phenomenon prevention photographic mode is selected;
- and
- emitting means driven according to the flash driving signal outputted from the control means and for emitting a predetermined amount of light.
Dependencies are inferred from the claim text.