Slim Lens Driving Structure for OIS Shock Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge is to develop a slim-structured lens driving device for thinner smartphones that can effectively support the Optical Image Stabilizer (OIS) function while preventing lens deviation due to shock and ensuring improved auto focusing and zoom capabilities in high-pixelated, miniaturized camera modules.
Innovation Solution
The lens driving device incorporates a bobbin with a first coil and magnet, an upper and bottom elastic member, a substrate with a second coil, and a terminal member with connectors, which includes a support member to elongate the elastic deformable section, reducing the device's overall length and tilt angle during handshake correction, thereby enhancing image quality and preventing lens disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the camera module is miniaturized to fit thinner smartphones, then the overall device size is reduced, but the activating length of the elastic member for OIS function becomes insufficient
Solution Approach 1:
The patent repositions the second connector to be disposed under the first connector in the vertical direction, creating a multi-level terminal member structure. This dimensional arrangement allows the elastic member to achieve sufficient activating length for OIS function within the miniaturized camera module volume, resolving the contradiction between device miniaturization and elastic member length requirements.
2Ease of manufacture
If the lens driving device structure is simplified for miniaturization, then manufacturing becomes easier, but the device becomes more susceptible to shock-induced lens deviation
Solution Approach 1:
The patent incorporates an elastic member that provides cushioning protection to the lens module against shock forces. The elastic member is pre-configured to absorb and dampen impact forces, preventing shock-induced lens deviation while maintaining a compact structure suitable for miniaturized devices.
Solution Approach 2:
The terminal member acts as an intermediary component between the support member and substrate, providing both mechanical support and electrical connection. This intermediary structure enhances lens stability under shock while maintaining manufacturing simplicity through integrated design.
3Manufacturing precision
If the elastic member length is increased to improve OIS function, then the tilt angle during handshake correction is reduced, but the overall device length increases
Solution Approach 1:
The patent utilizes vertical stacking of connectors (second connector under the first connector) to accommodate the extended elastic member length without increasing the horizontal device footprint. This dimensional reorganization allows sufficient elastic member length for precise handshake correction while maintaining a compact overall device length.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows for a slim lens driving device that maintains effective OIS performance, reduces screen quality degradation from excessive tilt, and inhibits lens deviation due to shocks, enabling improved auto focusing and zoom functions in compact camera modules.
Implementation Method 1
a first coil disposed on the bobbin; a magnet which is disposed on the housing and faces the first coil; an upper elastic member disposed on an upper portion of the bobbin and coupled to the bobbin and the housing; a circuit member including a second coil facing the magnet
Implementation Method 2
an upper elastic member disposed on an upper portion of the bobbin and coupled to the bobbin and the housing
Data Source
AI summary
The present embodiment of the present invention relates to a lens driving device, comprising: a housing; a bobbin disposed in the housing; a first coil disposed on the bobbin; a magnet which is disposed on the housing and faces the first coil; a base disposed under the housing; a substrate which is disposed on an upper surface of the base and comprises a circuit member including a second coil facing the magnet; an upper elastic member disposed on an upper portion of the bobbin and coupled to the bobbin and the housing; a support member coupled to the upper elastic member; and a terminal member elastically connecting the support member with the substrate, wherein the terminal member comprises; a first connector coupled to the substrate; and a second connector coupled to the support member; and wherein the second connector is disposed at a position lower than the first connector.