Camera Module Gyro Sensor Leveling and OIS Magnetic Isolation
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Solution Overview
Problem
Existing camera modules face challenges in achieving ultra-slim, ultra-thin designs with high precision gyro sensors, securing sufficient light, minimizing optical misalignment, preventing magnetic interference, and reducing power consumption while implementing Optical Image Stabilization (OIS) technology.
Innovation Solution
The design includes a novel actuator configuration with a gyro sensor positioned on a circuit board perpendicular to the optical axis, a shield cover with a guide groove for precise leveling, and an OIS unit with a variable prism and magnet driving unit, allowing for compact size, precise light control, and low power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the gyro sensor is positioned on a circuit board perpendicular to the optical axis, then the camera module achieves ultra-thin design, but the precision of gyro sensor leveling becomes difficult to secure
Solution Approach 1:
A guide groove structure is introduced as an intermediary element between the circuit board and the gyro sensor. The guide groove receives and positions the gyro sensor, ensuring precise leveling perpendicular to the optical axis while maintaining the ultra-thin form factor. This mediator structure resolves the conflict between thinness and positioning precision.
2Volume of moving object
If the camera module is designed to be micro-miniature and ultra-thin, then the size is reduced, but the amount of light received by the image sensor decreases
Solution Approach 1:
The optical system is designed to utilize light in multiple dimensions and paths. By optimizing the optical path length and using reflective surfaces, the system maximizes light collection efficiency within the constrained volume, allowing the ultra-thin camera module to receive sufficient light for high-quality imaging.
3Reliability
If OIS technology is implemented to correct image shake, then image quality is improved, but magnetic interference from the magnet driving unit affects the gyro sensor
Solution Approach 1:
The magnet driving unit for OIS is spatially separated from the gyro sensor position. The magnetic field generation is extracted to a location where it does not interfere with the gyro sensor's sensitive measurements, while still maintaining effective OIS correction capability through optimized magnetic field distribution and driving coil positioning.
4Use of energy by stationary object
If the actuator configuration is optimized for low power consumption, then energy efficiency is improved, but the structural complexity increases
Solution Approach 1:
The actuator system is designed with multi-functionality, where a single integrated structure performs multiple functions including focus adjustment, OIS correction, and positioning. This universal design reduces the number of separate components needed, thereby lowering overall power consumption while managing structural complexity through functional integration.
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 creation of micro-miniature, ultra-thin camera modules with improved precision, reduced magnetic interference, and efficient OIS functionality, enhancing image quality and resolution while minimizing power consumption.
Implementation Method 1
OIS technology detects the movement of the camera through a gyro sensor and calculates the distance for the image sensor to move
Implementation Method 2
a magnet disposed on the second circuit board, and a coil disposed on the third circuit board
Data Source
AI summary
A camera module can include a first circuit board on which an image sensor is disposed, a first housing disposed on the first circuit board, a lens assembly disposed in the first housing, a second circuit board disposed on a first side portion of the first housing, a gyro sensor disposed on a second side portion of the first housing, a prism disposed in the first housing, and an OIS unit disposed between the first housing and the prism.