Prism Driving Structure for Compact Image Blur Correction Cameras
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Solution Overview
Problem
Existing camera devices face challenges in miniaturization due to the requirement of a large space for rocking the prism, which does not coincide with the reflecting surface, making it difficult to reduce the device size.
Innovation Solution
The camera device incorporates a prism driving device with a flexible printed circuit board for current supply and a supporting shaft with a unique outer peripheral surface configuration, allowing the prism to be rocked in a compact space while aligning the reflecting surface with the rocking shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the prism is rocked using a conventional supporting shaft configuration where the rocking shaft does not coincide with the reflecting surface, then the prism can be driven to correct image blur, but a large space is required for rocking the prism, making it difficult to reduce the device size
Solution Approach 1:
The patent repositions the rocking shaft to coincide with the reflecting surface of the prism, changing the spatial arrangement from a conventional offset configuration to a centered configuration. This dimensional repositioning allows the prism to rock in a compact space while maintaining the optical path for image blur correction, effectively resolving the contradiction between miniaturization and functional reliability
2Volume of moving object
If the device is miniaturized by reducing the space for rocking the prism, then the device size is reduced, but it becomes difficult to maintain proper alignment between the rocking shaft and the reflecting surface
Solution Approach 1:
The patent merges the rocking shaft position with the reflecting surface position, making them coincide at the same location. This merging eliminates the need for precise alignment between separate components, as they are now integrated at a single position. The supporting shaft is configured to directly support the prism at the reflecting surface location, simplifying the structure and enabling miniaturization without compromising alignment precision
3Volume of moving object
If a conventional prism driving configuration is used with separate current supply components, then the prism can be driven, but the device complexity and space requirements increase
Solution Approach 1:
The flexible printed circuit board serves multiple functions: it supplies current to the coil for prism driving, provides structural support, and enables flexible routing within the compact device. This multi-functional design eliminates the need for separate current supply components and rigid circuit boards, reducing both space requirements and device complexity while maintaining the prism driving function
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 enables the camera device to be miniaturized by reducing the space required for rocking the prism, while ensuring efficient light guidance and easy return to the initial position through the resilient force of the plate spring.
Implementation Method 1
a magnet and a coil generating a driving force of the prism pedestal
Implementation Method 2
easy return to the initial position through the resilient force of the plate spring
Data Source
AI summary
A camera device is described that includes a prism driving device for driving a prism, a lens driving device for driving a lens body, and a base for fixing an image sensor. These components stand in order in a straight line in a case. The prism driving device has a driving portion and a flexible printed circuit board for relaying current supply from an external portion to the driving portion. Terminals of the flexible printed circuit board are connected to terminal receiving portions of the base.