Dual-Actuator Optical Stabilization for Lens and Sensor
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Solution Overview
Problem
Current camera modules face challenges in achieving sufficient optical image stabilization stroke and response speed due to the increasing weight and size of lenses, which limits the driving force provided by motors, leading to compromised imaging quality and longer compensation times.
Innovation Solution
A driving structure for optical actuators comprising a first part for translating a lens in the x-axis and y-axis directions and a second part for translating and rotating a photosensitive chip, with a driving logic module maintaining a preset ratio between lens and photosensitive chip movement distances to optimize optical image stabilization performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the lens weight and size are increased to improve imaging quality, then the imaging quality is improved, but the driving force provided by the motor is insufficient and the response speed decreases
Solution Approach 1:
The patent divides the optical actuator into two independent driving systems: a first driving part for driving the lens and a second driving part for driving the photosensitive chip. This segmentation allows each motor to be optimized for its specific load, with the second motor driving the lighter photosensitive chip to achieve fast response speed while the first motor handles the heavier lens for imaging quality.
Solution Approach 2:
Instead of the conventional approach where only the lens is driven, this patent inverts the approach by also driving the photosensitive chip in the opposite direction. This creates a dual-driven system where both components contribute to the optical image stabilization, effectively doubling the stabilization capability.
2Manufacturing precision
If the lens weight is increased to improve imaging quality, then the imaging quality is improved, but the optical image stabilization stroke is reduced
Solution Approach 1:
By separating the driving functions into two independent systems (lens driving and photosensitive chip driving), the patent enables the photosensitive chip to provide additional stabilization stroke independent of the lens movement, effectively increasing the total stabilization stroke available.
Solution Approach 2:
The patent drives the photosensitive chip in the opposite direction to the lens movement, creating a synergistic effect that extends the total stabilization stroke beyond what would be achievable by lens movement alone.
3Device complexity
If a single motor drives both lens and photosensitive chip, then the structure is simplified, but the driving force is insufficient for optimal stabilization performance
Solution Approach 1:
The patent divides the optical actuator into two independent driving systems: a first driving part for driving the lens and a second driving part for driving the photosensitive chip. This segmentation allows each motor to be optimized for its specific load, with the second motor driving the lighter photosensitive chip to achieve fast response speed while the first motor handles the heavier lens for imaging quality.
Solution Approach 2:
Both the first driving part and second driving part work together to achieve optical image stabilization, making the system multi-functional. The first motor handles lens positioning and stabilization, while the second motor handles photosensitive chip positioning and stabilization, creating a redundant and robust stabilization system.
Data Source
AI summary
The present invention relates to a driving structure for use in an optical actuator, including: a first driving part, which is suitable for mounting a lens and driving the lens to move transversely in the x-axis and y-axis directions; and a second driving part, which is suitable for driving a photosensitive chip to move transversely in the x-axis and y-axis directions, where the lens and the photosensitive chip are configured to be driven simultaneously and to move in opposite directions. Also provided in the present invention are a corresponding photographing method, an optically stabilizing photographing module, and a corresponding assembly method. The present application increases the stabilization travel and the stabilization response speed of the photographing module.