Image Sensor Shift Camera Module for Heavy-Lens Shake Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing weight of lenses due to higher pixel density in camera devices makes it difficult to secure electromagnetic force for moving the lens in a limited space, hindering effective handshake correction.
Innovation Solution
The camera device moves the image sensor in three axes (x-axis shift, y-axis shift, and z-axis rolling) instead of the lens, using a connection substrate with terminal parts to facilitate movement and integrate Hall sensors or driver ICs for precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the lens diameter is increased to achieve higher pixel density, then the image quality is improved, but the lens weight increases making it difficult to secure electromagnetic force for moving the lens in a limited space
Solution Approach 1:
Instead of moving the lens for handshake correction as in conventional designs, this patent inverts the approach by moving the image sensor while keeping the lens stationary. This allows the use of a heavier lens for high pixel density without compromising the ability to perform handshake correction, as the electromagnetic actuator now moves the lighter image sensor assembly rather than the heavy lens.
Solution Approach 2:
The patent segments the moving components into separate functional units: the lens remains fixed in one position while the image sensor is moved independently by an electromagnetic actuator. This segmentation allows the lens to be optimized for image quality with higher pixel density while the image sensor assembly is optimized for ease of movement during handshake correction.
2Measurement precision
If the lens weight is increased for higher pixel density, then the image resolution is improved, but the electromagnetic force required for moving the lens becomes insufficient in a limited space
Solution Approach 1:
The patent inverts the conventional handshake correction mechanism by making the lens stationary and moving the image sensor instead. This inversion reduces the weight of the moving component, allowing sufficient electromagnetic force to be generated in a limited space while maintaining high image resolution through the heavier, stationary lens with higher pixel density.
Solution Approach 2:
The patent applies local quality by optimizing different components for different functions: the lens is designed with high pixel density for image resolution while the image sensor assembly is designed for ease of movement. The electromagnetic actuator is positioned to optimally move the image sensor, creating localized optimization of force application where it is most effective.
3Reliability
If the lens is moved for handshake correction, then the image shake is corrected, but the heavy lens cannot be moved effectively in a limited space
Solution Approach 1:
The patent fundamentally inverts the handshake correction approach by keeping the lens stationary and moving the image sensor instead. This ensures reliable handshake correction while avoiding the problem of moving a heavy lens, as the image sensor assembly is significantly lighter and can be effectively moved by a compact electromagnetic actuator in the limited space available.
Solution Approach 2:
The patent segments the optical system into fixed and movable parts: the lens remains fixed to maintain stability and reduce moving mass, while the image sensor is separated and made movable by the electromagnetic actuator. This segmentation enables reliable handshake correction through image sensor movement without the constraints of moving a heavy lens assembly.
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 approach inhibits interference between the sensing substrate for AF drive control and the connection substrate for electrical conduction, allowing for effective handshake correction without the limitations of moving heavy lenses.
Implementation Method 1
there is a problem in that it is difficult to secure electromagnetic force for moving the lens in a limited space
Implementation Method 2
a connection substrate connecting the image sensor and the first substrate, wherein the connection substrate may comprise a first terminal part being connected to the first substrate and a second terminal part being connected to the sensing substrate
Data Source
AI summary
The present embodiment relates to a camera device comprising: a first substrate; a base being disposed on the first substrate; an image sensor being disposed on the first substrate to move in a direction perpendicular to an optical axis; a housing coupling with the base; a bobbin being disposed on the base and disposed to move in a direction of the optical axis; a sensing substrate being disposed in the housing; and a connection substrate connecting the image sensor and the first substrate, wherein the connection substrate may comprise a first terminal part being connected to the first substrate and a second terminal part being connected to the sensing substrate.