Periscope Zoom Camera Module with Segmented Autofocus Actuation
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Solution Overview
Problem
Periscope-type zoom cameras with autofocusing and optical imaging stabilization functions face decreased auto-focusing speed and precision due to actuators driving lens members in multiple directions.
Innovation Solution
A fast-focusing zoom camera module utilizing single-direction actuators for the reflecting, lens, and light sensing assemblies, allowing independent movement in one direction each, combined with optical image stabilization through a third actuator, to enhance focusing speed and precision while reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple actuators are used to drive lens members in two or three directions for autofocusing and optical image stabilization, then the camera module achieves both autofocusing and stabilization functions, but the auto-focusing speed and precision decrease
Solution Approach 1:
The patent divides the actuator system into separate single-direction actuators for different functions. Specifically, it uses a first actuator for reflecting assembly rotation, a second actuator for lens assembly movement along the optical axis, and a third actuator for light sensing assembly stabilization. This segmentation allows each actuator to operate independently in one direction only, eliminating the interference that occurs when multiple actuators drive the same lens member in multiple directions, thereby improving auto-focusing precision while maintaining both autofocusing and stabilization functions
2Adaptability or versatility
If multiple actuators are used to drive lens members in two or three directions for autofocusing and optical image stabilization, then the camera module achieves both autofocusing and stabilization functions, but the auto-focusing speed decreases
Solution Approach 1:
The patent segments the actuator system so that the second actuator is dedicated exclusively to driving the lens assembly along the optical axis for autofocusing, while the third actuator handles light sensing assembly stabilization. This functional segmentation eliminates the time conflict and mechanical interference that occur when multiple actuators share the same lens member, enabling faster and more precise auto-focusing responses
3Adaptability or versatility
If multiple actuators are used to drive lens members in two or three directions, then both autofocusing and optical image stabilization functions are achieved, but the device complexity increases
Solution Approach 1:
Instead of using complex multi-directional actuators, the patent segments the system into three simple single-direction actuators, each responsible for a specific function. This approach reduces the mechanical complexity of individual actuators while achieving the same functional versatility through coordinated operation of multiple simple components
Solution Approach 2:
The patent achieves multi-functionality (autofocusing, optical image stabilization, and reflecting assembly rotation) through the coordinated operation of three single-direction actuators. Each actuator performs one function, but together they enable the camera module to achieve multiple functions, demonstrating that distributed simple actuators can be as versatile as complex multi-directional actuators
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
The solution enables rapid focusing and stabilization with improved precision and reduced costs by using single-direction actuators, optimizing the movement of lens components and stabilizing the imaging process.
Implementation Method 1
The reflecting assembly (2) reflects light rays towards the lens assembly (3)
Implementation Method 2
the lens assembly (3) focuses the reflected light rays to form an image onto the light sensing assembly (4)
Implementation Method 3
multiple actuators, such as voice coil motors or optical image stabilizers
Implementation Method 4
optical image stabilizers
Data Source
AI summary
A fast-focusing zoom camera module with precise and high-speed autofocus function includes a reflecting assembly, a lens assembly, and a light sensing assembly, the lens assembly is arranged between the reflecting assembly and the light sensing assembly. The reflecting assembly comprises a reflecting member and a first actuator, the first actuator driving the reflecting member to rotate around a second direction. The lens assembly comprises a lens member and a second actuator, the second actuator drives the lens member to move along a first direction. The light sensing assembly comprises a first circuit board, a sensor, and a third actuator, the sensor is electrically connected to the first circuit board, the third actuator drives the sensor to move along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other.