Auto-focusing apparatus and method for camera
First Claim
Patent Images
1. A method of auto focusing a camera, comprising the steps of:
- measuring an initial value of an encoder corresponding to a first control signal necessary for initial movements of a focus lens;
measuring a distance value of a subject using a distance measuring sensor;
determining a displacement that a focus lens has to be moved based on the measured distance value; and
adjusting a position of the focus lens to be moved by a driver, such that a position value of the focus lens moved is substantially the same as the displacement value by transferring a second control signal according to the initial value of the encoder and the displacement value to the driver.
1 Assignment
0 Petitions
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.
-
Citations
16 Claims
-
1. A method of auto focusing a camera, comprising the steps of:
-
measuring an initial value of an encoder corresponding to a first control signal necessary for initial movements of a focus lens; measuring a distance value of a subject using a distance measuring sensor; determining a displacement that a focus lens has to be moved based on the measured distance value; and adjusting a position of the focus lens to be moved by a driver, such that a position value of the focus lens moved is substantially the same as the displacement value by transferring a second control signal according to the initial value of the encoder and the displacement value to the driver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. An apparatus for auto-focusing a camera, comprising:
-
an encoder, wherein an initial value of the encoder corresponds to a first control signal necessary for initial movements of a focus lens; a distance measuring sensor for measuring a distance to a subject and transferring the measured distance value to an image signal processor (ISP); the ISP receiving the initial value of the encoder and determining a displacement which a focus lens has to be moved based on the measured distance value received from the distance measuring sensor; and a controller for adjusting a position value of the focus lens to be moved by a driver, such that a position of the moved focus lens is the same as the displacement value by transferring a second control signal according to the initial value of the encoder and the displacement value to the driver. - View Dependent Claims (11, 12, 13, 14, 15, 16)
-
Specification