Image sensing apparatus and control method thereof
AssigneeCanon Kabushiki Kaisha
InventorTatsuyuki Tokunaga
Life of this patent
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Abstract
An image sensing apparatus, having an image sensor for sensing an image of an object and an analog-digital converter which operates at a predetermined frequency and converts an analog signal read from the image sensor to a digital signal, controls the relationship between a phase of the analog signal read from the image sensor and a phase of a timing signal for operating the analog-digital converter in accordance with the peripheral condition.
Claims5
An image sensing apparatus having an image sensor, which has a first area for sensing an image of an object and a second area which is shielded from light, for sensing an image of an object, comprising:
- an analog-digital converter that operates at a predetermined frequency and converts an analog signal read from the image sensor to a digital signal;
- and
- a controller that controls a relationship between a phase of a timing signal for reading out the analog signal from the image sensor and a phase of a timing signal for operating said analog-digital converter on the basis of signals obtained from the second area by relatively shifting the phase of the timing signal for reading out the analog signal and the phase of the timing signal for operating said analog-digital converter, and converting the analog signal by said analog-digital converter for each shifted phase.
A control method of an image sensing apparatus having an image sensor, which has a first area for sensing an image of an object and a second area which is shielded from light, for sensing an image of an object, and an analog-digital converter which operates at a predetermined frequency and converts an analog signal read from the image sensor to a digital signal, comprising:
- determining a relationship between a phase of a timing signal for reading out the analog signal from the image sensor and a phase of a timing signal for operating said analog-digital converter on the basis of signals obtained from the second area by relatively shifting the phase of the timing signal for reading out the analog signal and the phase of the timing signal for operating said analog-digital converter, and converting the analog signal by said analog-digital converter for each shifted phase.
Dependencies are inferred from the claim text.