Reflector drive device
By using cross-configured piezoelectric drive components and leaf spring support structures, the problem of insufficient movement speed of the optical reflector in the camera module was solved, realizing rapid movement and miniaturization of the reflector drive device.
CN115728903BActive Publication Date: 2026-07-07ALPS ALPINE CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ALPS ALPINE CO LTD
- Filing Date
- 2021-08-23
- Publication Date
- 2026-07-07
AI Technical Summary
Technical Problem
The optical reflectors in existing camera modules have insufficient movement speed, and miniaturization is difficult when driven by voice coil motors.
Method used
The first piezoelectric drive unit and the second piezoelectric drive unit are cross-configured. The first piezoelectric element and the second piezoelectric element cause the reflector holding component to swing around the first axis and the second axis. Combined with the leaf spring support structure, the rapid swing of the reflector is realized.
Benefits of technology
The speed of the reflector was increased, and the reflector drive device was miniaturized while maintaining the speed.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN115728903B_ABST
Abstract
A small-sized reflector driving device capable of improving the operation speed of a reflector. The reflector driving device includes a reflector holding member capable of holding a reflector that reflects light; a swing member linked to the reflector holding member so as to be able to swing about a first axis; a fixed side member linked to the swing member so as to be able to swing about a second axis having an axis direction perpendicular to that of the first axis; a first driving portion that causes the reflector holding member to swing about the first axis; and a second driving portion that causes the swing member to swing about the second axis. The first driving portion includes a first piezoelectric element extending along the axis direction of the first axis, and the second driving portion includes a second piezoelectric element extending along the axis direction of the second axis. The first piezoelectric element and the second piezoelectric element are arranged in a cross shape when viewed from a direction perpendicular to a reflecting surface of the reflector.
Need to check novelty before this filing date? Find Prior Art