AUTO-FOCUSING APPARATUS AND METHOD FOR CAMERA
First Claim
1. A method of auto focusing a camera, comprising the steps of:
- detecting an initial value of an encoder by measuring an initial position of a lens system;
matching the detected initial value of the encoder with an initial position value of the lens system;
measuring a distance value of a subject using a distance measuring sensor;
determining a displacement that a focus lens has to be moved with respect to the measured distance value; and
adjusting a position of the focus lens such that a position value of the focus lens moved is substantially the same as the displacement value.
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Accused Products
Abstract
Disclosed is an apparatus and method for auto-focusing a camera, which includes the steps of detecting an initial value of an encoder by measuring an initial position of a lens system, matching the measured initial value of the encoder with the initial position value of the lens system to be moved, measuring a distance value of a subject through a distance measuring sensor, determining a displacement that a focus lens has to be moved with respect to the measured distance value, and adjusting a position of the focus lens such that a position value of the focus lens actually moved is the same as the displacement value.
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Citations
16 Claims
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1. A method of auto focusing a camera, comprising the steps of:
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detecting an initial value of an encoder by measuring an initial position of a lens system; matching the detected initial value of the encoder with an initial position value of the lens system; measuring a distance value of a subject using a distance measuring sensor; determining a displacement that a focus lens has to be moved with respect to the measured distance value; and adjusting a position of the focus lens such that a position value of the focus lens moved is substantially the same as the displacement value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 14, 15)
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8. An apparatus for auto-focusing a camera, comprising:
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an encoder for detecting an initial value by measuring an initial position of a lens system; a distance measuring sensor for measuring a distance to a subject and transferring the measured value to an image signal processor (ISP); the ISP for receiving the initial value and matching the initial value with a starting position of auto-focusing, and for detecting a displacement which a focus lens has to be moved with respect to the measured value received from the distance measuring sensor; and a controller for adjusting a position value of the focus lens such that a position of the moved focus lens is the same as the displacement value. - View Dependent Claims (9, 10, 11, 12, 13, 16)
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Specification