Camera Module Chip Drive With Magnetic Centering and Dual Motion
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Solution Overview
Problem
The challenge of miniaturizing camera modules with high-pixel and high-frame rate requirements is hindered by the need for increased motor size and weight to accommodate larger lenses, leading to reduced focusing and anti-vibration capabilities due to limited driving force and increased friction.
Innovation Solution
A photosensitive chip driving device utilizing magnetic members and magnets along the optical axis to maintain stability and centering, separate optical anti-vibration and auto-focus functions, and employ guiding slots and supporting apparatuses for precise movement, ensuring miniaturization and improved displacement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the lens size and weight are increased to meet high-pixel imaging requirements, then the light-focusing function is improved, but the motor driving force becomes insufficient and the camera module size increases
Solution Approach 1:
The patent divides the motor system into two independent parts: a first motor dedicated to auto-focus driving and a second motor dedicated to optical anti-vibration driving. This segmentation allows each motor to be optimized for its specific function, with the second motor providing additional stabilization capability without compromising the first motor's focusing performance, thereby resolving the driving force insufficiency issue
Solution Approach 2:
The second motor is designed to serve dual purposes: it provides optical anti-vibration stabilization while also being able to assist in auto-focus operations when needed. This multi-functionality allows the system to maintain high-pixel imaging capability with a smaller overall motor configuration, addressing the driving force limitation
2Force
If the motor size is increased to provide sufficient driving force for heavier lenses, then the driving force is improved, but the camera module thickness and complexity increase
Solution Approach 1:
By segmenting the motor functions into two separate motors with specialized roles, the patent avoids the need for a single large, complex motor. Each motor can be smaller and simpler in design, reducing overall device complexity while providing sufficient combined driving force for both focusing and stabilization
Solution Approach 2:
The patent replaces the traditional single mechanical motor system with a dual-motor system that incorporates magnetic driving mechanisms. This substitution enables more efficient force application and control, reducing the mechanical complexity required to achieve the necessary driving force
3Manufacturing precision
If the lens weight is increased to improve imaging quality, then the light-gathering capability is improved, but the motor-driven lens moves slowly and friction increases
Solution Approach 1:
The patent segments the movement control into two independent systems: one for auto-focus and one for anti-vibration. This allows the heavier lens to be moved and stabilized more efficiently by distributing the control tasks, improving response speed and reducing the impact of increased weight on overall system performance
4Length of moving object
If the motor driving distance is limited due to insufficient driving force, then the focusing and anti-vibration ability deteriorates, but increasing motor size is not feasible
Solution Approach 1:
By dividing the driving functions between two motors, the patent enables each motor to operate within optimized distance ranges for its specific task. The first motor handles focus adjustments while the second motor manages stabilization movements, allowing sufficient driving distance for both functions without requiring a single oversized motor
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 solution allows for larger anti-vibration and focusing distances without increasing motor size, maintaining miniaturization, and reducing friction, thereby enhancing imaging quality and stability.
Implementation Method 1
a magnetic force generated between a magnetic member and a magnet along the optical axis direction is conducive to maintaining the stability of a movable carrier
Implementation Method 2
the diving apparatus comprises at least one group of coils and at least one group of magnets... drive the lens to move in multiple directions
Data Source
AI summary
Disclosed is a photosensitive chip driving device and a camera module. The photosensitive chip driving device, adapted for a photosensitive assembly, includes: a movable carrier for carrying the photosensitive assembly; a fixed base, wherein the fixed base and the movable carrier are disposed correspondingly at intervals along an optical axis direction; a diving apparatus comprising at least one group of coils and at least one group of magnets mounted on the peripheral side of the fixed base, and at least one group of coils being mounted on the peripheral side of the movable carrier; a guiding slot disposed between the movable carrier and the fixed base; a supporting apparatus movably disposed in the guiding slot; and a magnetic member mounted on the movable carrier and disposed corresponding to the magnets, so that a magnetic force along the optical axis direction is generated between the magnetic member and the magnets.