Digital camera
First Claim
Patent Images
1. A digital camera comprising:
- an image sensor having an array of pixels for performing photoelectric conversion on received light;
a first scanning circuit that selects a first portion of the array of pixels for output as a first signal used for a purpose other than flicker detection;
a second scanning circuit that selects a second portion of the array of pixels for output as a second signal used alternately for either flicker detection or for still image production, wherein the first and second portion of pixels are interleaved throughout the array of pixels;
a flicker detection circuit that, in a first mode, receives the second signal from the second scanning circuit for detecting flicker of a light source illuminating an object based on the second signal and that outputs a flicker signal; and
an image processor that, in the first mode, receives the flicker signal and the first signal and adjusts the first signal based on the flicker signal for outputting a video signal;
wherein, in a second mode, the image processor receives the first signal from the first scanning circuit and the second signal from the second scanning circuit and combines the first and second signals for producing a still image from the combined first and second signals.
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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.
42 Citations
12 Claims
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1. A digital camera comprising:
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an image sensor having an array of pixels for performing photoelectric conversion on received light; a first scanning circuit that selects a first portion of the array of pixels for output as a first signal used for a purpose other than flicker detection; a second scanning circuit that selects a second portion of the array of pixels for output as a second signal used alternately for either flicker detection or for still image production, wherein the first and second portion of pixels are interleaved throughout the array of pixels; a flicker detection circuit that, in a first mode, receives the second signal from the second scanning circuit for detecting flicker of a light source illuminating an object based on the second signal and that outputs a flicker signal; and an image processor that, in the first mode, receives the flicker signal and the first signal and adjusts the first signal based on the flicker signal for outputting a video signal;
wherein, in a second mode, the image processor receives the first signal from the first scanning circuit and the second signal from the second scanning circuit and combines the first and second signals for producing a still image from the combined first and second signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification