Digital camera
First Claim
1. A digital camera including an XY addressing image sensor having a first group of pixel circuits and a second group of pixel circuits, for displaying on a display device a video image based on a display video signal output from the first group of pixel circuits, and recording in a recording device image data based on a recording video signal output from the first and second groups of pixel circuits, comprising:
- a flicker detection circuit for detecting flicker of a light source illuminating an object based on a flicker detection video signal output from the second group of pixel circuits while the first group of pixel circuits output the display video signal;
wherein a first vertical synchronization signal utilized when the first group of pixel circuits output the display video signal and a second vertical synchronization signal utilized when the second group of pixel circuits output the flicker detection video signal are mutually asynchronous, and a cycle of the second vertical synchronization signal is determined in accordance with a cycle of fluctuation in luminance level of a light source assumed as the light source of the object.
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Accused Products
Abstract
A digital camera capable of accurately detecting flicker even while a video image is displayed on a display device is provided. In a digital camera, a video image is displayed on a display device 40 serving as a viewfinder for photographing based on a display video signal supplied from a CMOS image sensor 120 while image data based on a recording video signal supplied from the CMOS image sensor 120 is recorded in a recording unit 50. The digital camera detects flicker based on a video signal supplied from a group of pixel circuits which do not supply the display video signal among the group of pixel circuits forming the CMOS image sensor 120.
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Citations
7 Claims
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1. A digital camera including an XY addressing image sensor having a first group of pixel circuits and a second group of pixel circuits, for displaying on a display device a video image based on a display video signal output from the first group of pixel circuits, and recording in a recording device image data based on a recording video signal output from the first and second groups of pixel circuits, comprising:
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a flicker detection circuit for detecting flicker of a light source illuminating an object based on a flicker detection video signal output from the second group of pixel circuits while the first group of pixel circuits output the display video signal;
whereina first vertical synchronization signal utilized when the first group of pixel circuits output the display video signal and a second vertical synchronization signal utilized when the second group of pixel circuits output the flicker detection video signal are mutually asynchronous, and a cycle of the second vertical synchronization signal is determined in accordance with a cycle of fluctuation in luminance level of a light source assumed as the light source of the object. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification