Rotational actuator for optical device and camera module having the same

a technology of rotating actuator and optical device, which is applied in the field of rotating actuator for optical device and camera module having the same, can solve the problems of deteriorating photographing function of camera module compared to general digital camera, weakening color reproduction of imaging device, and serious social issues of personal information stored in portable terminals, etc., to achieve reliable operation, easy application, and sufficient heat resistance
US20180003915A1Inactive Publication Date: 2018-01-04JAHWA ELECTRONICS
4 Cites 1 Cited by

Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
JAHWA ELECTRONICS
Publication Date
2018-01-04
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

Disclosed is a rotational actuator for an optical device, which includes a rotary shaft capable of freely rotating at a fixed position; a first shape-memory alloy wire fixed in a first direction to give a rotation moment to the rotary shaft, the first shape-memory alloy wire making length contraction with respect to the rotary shaft when an electric current is applied thereto; a second shape-memory alloy wire fixed in a second direction opposite to the first direction to give a rotation moment with respect to the rotary shaft, the second shape-memory alloy wire making length contraction with respect to the rotary shaft when an electric current is applied thereto; and a control unit configured to supply an electric current to the first shape-memory alloy wire when rotating the rotary shaft in the first direction and supply an electric current to the second shape-memory alloy wire when rotating the rotary shaft in the second direction.
Need to check novelty before this filing date? Find Prior Art

Description

CROSS-REFERENCE TO RELATED APPLICATION AND CLAIM OF PRIORITY

[0001] The present application claims priority to Korean Patent Application No. 10-2016-0083741 filed on Jul. 1, 2016 in the Korea Intellectual Property Office, the disclosures of which are incorporated herein by reference.BACKGROUND1. Technical Field

[0002] The present disclosure relates to a rotational actuator for an optical device and a camera module having the same, and more particularly, to a rotational actuator for an optical device, which is integrally provided at a camera module mounted to a portable terminal but is capable of rotating without giving any serious influence on size and power consumption of the camera module, and a camera module having the same.2. Background Art

[0003] Generally, a camera module for taking an image is basically loaded on a portable terminal (hereinafter, referred to as a “portable terminal”) such as a cellular phone, a smart phone, a PDA or the like.

[0004] The camera module loaded on the po...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More