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US 2013/0258123 A1Published application
Ois actuator and camera module having the same ois actuator
AssigneeLG Innotek Co., Ltd.
InventorHohwan Kim
Life of this patent
Estimating the term…
Abstract
The present invention relates to an OIS actuator and a camera module having the OIS actuator, the OIS actuator including: a horizontal driving unit; a vertical driving unit; and a support unit positioned at a periphery of the vertical driving unit and formed with a fourth electrode, wherein any one of the horizontal driving unit and the vertical driving unit is driven to compensate a warping of an optical path of an OIS lens unit.
Claims20
An OIS actuator, the OIS actuator comprising:
- a horizontal driving unit connected by wrapping an edge of an OIS lens unit positioned on an optical path, having a first combteeth-shaped first electrode at one side and a first elastic unit at the other side, and driven to a horizontal direction perpendicular to an optical axis of the OIS lens unit based on electrostatic force acting on the first electrode and elasticity force acting on the first elastic unit;
- a vertical driving unit positioned at a periphery of the horizontal driving unit, having a second electrode discretely meshed with the first combteeth-shaped first electrode, a second combteeth-shaped third electrode at one side perpendicular to the optical axis and the horizontal direction and a second elastic unit on the other side, and driven to a horizontal direction based on electrostatic force acting on the third electrode and elasticity force acting on the second elastic unit;
- and a support unit positioned at a periphery of the vertical driving unit and having a fourth electrode discretely meshed with the second combteeth-shaped third electrode, wherein a warpage of an optical path of the OIS lens unit is compensated by driving of at least any one of the horizontal driving unit and the vertical driving unit.
A camera module having an OIS actuator, the camera module comprising:
- an image sensor imaged by light;
- an OIS actuator including an OIS lens unit positioned at a front surface of the image sensor to allow light to penetrate therethrough, a horizontal driving unit connected by wrapping an edge of the OIS lens unit to drive to a horizontal direction, a vertical driving unit positioned at an edge of the horizontal driving unit to vertically drive relative to an optical axis of the OIS lens unit and the horizontal direction respectively, and a support unit positioned at a periphery of the vertical driving unit;
- an angular velocity detection unit detecting an angular velocity corresponding to a warpage of an optical path of the OIS lens unit;
- and an OIS driving unit transmitting a driving signal to the OIS actuator in response to the detected angular velocity, wherein the horizontal driving unit includes:
- a first combteeth-shaped first electrode at one side and a first elastic unit at the other side, and driven to a horizontal direction perpendicular to an optical axis of the OIS lens unit based on electrostatic force acting on the first electrode and elasticity force acting on the first elastic unit;
- a vertical driving unit having a second electrode discretely meshed with the first combteeth-shaped first electrode, a second combteeth-shaped third electrode at one side perpendicular to the optical axis and the horizontal direction and a second elastic unit on the other side, and driven to a horizontal direction based on electrostatic force acting on the third electrode and elasticity force acting on the second elastic unit;
- and a support unit having a fourth electrode discretely meshed with the second combteeth-shaped third electrode.
4 more elements
Dependencies are inferred from the claim text.