Patent ID: 9467603
Filing Date: 2016-10-11
CPC Classification: G02B,G03B,H04N

Claim Text:
1. A position detection apparatus, comprising: a first magnet for optical image stabilization configured to move as a lens moves in an optical axis direction and in an in-plane direction orthogonal to an optical axis; a second magnet for the optical image stabilization configured to move as the lens moves in the optical axis direction and in the in-plane direction orthogonal to the optical axis; a first position sensor configured to sense a first magnetic field to be changed according to a movement of the first magnet in a plane orthogonal to the optical axis direction to detect a position of the lens in the plane orthogonal to the optical axis direction; a second position sensor configured to sense a second magnetic field to be changed according to a movement of the second magnet in the plane orthogonal to the optical axis direction to detect the position of the lens in the plane orthogonal to the optical axis direction; a camera module configured to accommodate the lens, the first magnet, and the second magnet; and a lens position detector configured to detect the position of the lens based on an output of the first position sensor and an output of the second position sensor, wherein the first position sensor and the second position sensor are respectively arranged at any one of corner regions of the camera module, in a plan view when viewed from the optical axis direction, wherein the first position sensor is configured to detect the position of the lens in a first direction orthogonal to the optical axis, wherein the second position sensor is configured to detect the position of the lens in a second direction orthogonal to the optical axis, wherein when an A axis is the first direction and an X axis is an axis obtained by rotating the A axis by a predetermined angle centering around the optical axis, and when a B axis is the second direction and a Y axis is an axis obtained by rotating the B axis by the predetermined angle in a same direction as the A axis centering around the optical axis, the lens position detector is configured to detect the positions of the lens on the X axis and the Y axis, and wherein the predetermined angle is approximately 45 degrees.