Position detection apparatus

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 lens position detector is configured to carry out an axis conversion for the A axis and the B axis based on the output of the first position sensor and the output of the second position sensor, and to detect the position of the lens in the X axis and in the Y-axis.

A position detection apparatus that detects a position of a lens in a plane orthogonal to an optical axis direction of the lens to detect a position for optical image stabilization, the position detection apparatus comprising:

• a first magnet for optical image stabilization configured to move as the lens moves in the 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 for the optical image stabilization 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 for the optical image stabilization 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, the camera module being configured to have a square shape in a top view;
• 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 four corners 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.

A position detection apparatus that detects a position of a lens in a plane orthogonal to an optical axis direction of the lens to detect a position for optical image stabilization, the position detection apparatus comprising:

• a first magnet for optical image stabilization configured to move as the lens moves in the 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 for the optical image stabilization 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 for the optical image stabilization 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, the camera module being configured to have a square shape in a top view;
• 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 four corners 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 lens position detector is configured to carry out an axis conversion for the A axis and the B axis based on the output of the first position sensor and the output of the second position sensor, and to detect the position of the lens in the X axis and in the Y-axis.

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;
• and
• a camera module configured to accommodate the lens, the first magnet, and the second magnet,
• 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 when an A axis is a first direction orthogonal to the optical axis and an X axis is an axis obtained by rotating the A axis, the first position sensor is configured to detect the position of the lens on the A axis and the position of the lens on the X axis, and
• wherein when a B axis is a second direction orthogonal to the optical axis and the first direction and a Y axis is an axis obtained by rotating the B axis, the second position sensor is configured to detect the position of the lens on the B axis and the position of the lens on the Y axis.

A position detection apparatus that detects a position of a lens in a plane orthogonal to an optical axis direction of the lens to detect a position for optical image stabilization, the position detection apparatus comprising:

• a first magnet for optical image stabilization configured to move as the lens moves in the 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 for the optical image stabilization 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 for the optical image stabilization 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;
• and
• a camera module configured to accommodate the lens, the first magnet, and the second magnet, the camera module being configured to have a square shape in a top view;
• wherein the first position sensor and the second position sensor are respectively arranged at any one of four corners of the camera module, in a plan view when viewed from the optical axis direction,
• wherein when an A axis is a first direction orthogonal to the optical axis and an X axis is an axis obtained by rotating the A axis, the first position sensor is configured to detect the position of the lens on the A axis and the position of the lens on the X axis, and
• wherein when a B axis is a second direction orthogonal to the optical axis and the first direction and a Y axis is an axis obtained by rotating the B axis, the second position sensor is configured to detect the position of the lens on the B axis and the position of the lens on the Y axis.

A correction mechanism comprising:

• a camera module configured to accommodate a lens, a first magnet for optical image stabilization, and a second magnet for optical image stabilization;
• the first magnet being arranged at a corner region in a first direction orthogonal to an optical axis direction in the camera module and configured to move as the lens moves in an in-plane direction orthogonal to an optical axis;
• the second magnet being arranged at a corner region in a second direction orthogonal to the optical axis direction different from the first direction in the camera module and configured to move as the lens moves in the in-plane direction orthogonal to the optical axis;
• a first hall element configured to be arranged oppositely to the first magnet in the optical axis direction and to sense a first magnetic field to be changed according to a movement of the first magnet in the plane orthogonal to the optical axis direction of the first magnet;
• a second hall element configured to be arranged oppositely to the second magnet in the optical axis direction and 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 of the second magnet;
• a first coil for the optical image stabilization configured to be provided in a vicinity of the first magnet and configured such that an axial direction is arranged in parallel to the optical axis direction;
• and
• a second coil for the optical image stabilization configured to be provided in a vicinity of the second magnet and configured such that an axial direction is arranged in parallel to the optical axis direction,
• wherein when an A axis is a first direction orthogonal to the optical axis and an X axis is an axis obtained by rotating the A axis, the first hall element is configured to detect the position of the lens on the A axis and the position of the lens on the X axis, and
• wherein when a B axis is a second direction orthogonal to the optical axis and the first direction and a Y axis is an axis obtained by rotating the B axis, the second hall element is configured to detect the position of the lens on the B axis and the position of the lens on the Y axis.