OIS Correction Range Expansion via AF-Driven Unit Control
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Solution Overview
Problem
Existing camera systems with ball bearing type optical image stabilization (OIS) actuators face limitations in correction angle and size due to mechanically designed driving sections, which restrict the OIS correction range and require larger camera modules.
Innovation Solution
An electronic device with a lens assembly, auto focus (AF) module, and OIS module that includes a unit correction section based on the driving range and resolution of the OIS module, allowing the processor to control the AF and OIS modules to move the lens assembly along the optical axis and perpendicular to it, expanding the OIS correction range without increasing the camera module size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ball bearing type OIS actuator is used with a mechanically designed driving section, then the OIS actuator provides a larger shaking correction angle range and better shock resistance, but a driving impossible section is generated that limits the OIS correction angle or requires increasing the camera module size
Solution Approach 1:
The patent applies dynamics by making the OIS correction section variable rather than fixed. The processor dynamically determines the OIS correction section based on the AF correction section, allowing the system to adapt the correction range according to actual shooting conditions. This resolves the contradiction by enabling the OIS actuator to effectively utilize its full correction capability without being limited by static mechanical design constraints.
Solution Approach 2:
The patent changes the parameter of the OIS correction section by determining it as a variable range based on the AF correction section rather than using a fixed mechanical limit. This parameter change allows the system to expand the effective OIS correction angle beyond traditional mechanical constraints, resolving the contradiction between maintaining shock resistance and expanding correction range.
2Adaptability or versatility
If the camera module size is increased to expand the OIS correction range, then the OIS correction angle can be improved, but the overall device size and complexity increase
Solution Approach 1:
The patent replaces the traditional mechanical limitation approach with a software-based control system. Instead of increasing physical components to expand correction range, the processor determines the OIS correction section based on AF correction information, substituting mechanical expansion with intelligent control. This resolves the contradiction by achieving expanded correction range without increasing camera module size.
Solution Approach 2:
The patent makes the OIS module multi-functional by enabling it to operate effectively across a dynamically determined correction section that adapts to different AF states. This universal approach allows the same OIS hardware to provide optimized correction performance across various shooting scenarios without requiring additional components or increasing module size.
3Device complexity
If the OIS correction section is limited by mechanical design, then the camera module structure remains simple, but the shaking correction performance is restricted
Solution Approach 1:
The patent substitutes mechanical design limitations with software-based determination of the OIS correction section. The processor calculates the appropriate correction range based on AF correction information, replacing the need for complex mechanical structures while improving shaking correction performance. This resolves the contradiction by achieving better correction performance without increasing structural complexity.
Solution Approach 2:
The patent introduces the processor as an intermediary that mediates between the AF module and OIS module. By using the processor to determine the OIS correction section based on AF correction information, the system achieves improved shaking correction performance without requiring direct complex mechanical coupling between components, thus maintaining structural simplicity while enhancing performance.
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 effectively improves the shaking correction function by expanding the OIS correction range, allowing for clearer images without enlarging the camera module, by determining a unit correction section based on the OIS module's driving range and resolution, thereby overcoming physical limitations.
Implementation Method 1
a motion sensor, and at least one processor, comprising processing circuitry, electrically connected to the AF module, the OIS module, the image sensor, and the motion sensor. At least one processor... may be configured to: detect a motion of the electronic device using the motion sensor
Data Source
AI summary
An electronic device according to an embodiment comprises: a lens assembly including one or more lenses aligned along an optical axis; an auto focus (AF) module comprising circuitry configured to move the lens assembly in the direction of the optical axis; an optical image stabilization (OIS) module comprising circuitry configured to move the lens assembly in a plane perpendicular to the optical axis, wherein the OIS module includes a unit correction section based on a driving range of the OIS module, a movement range of the lens assembly in the plane according to driving of the AF module, and a resolution of the OIS module; an image sensor configured to acquire light passing through the lens assembly; a motion sensor; and at least one processor, comprising processing circuitry, electrically connected to the AF module, the OIS module, the image sensor, and the motion sensor, wherein at least one processor, individually and/or collectively, may be configured to: detect a motion of the electronic device using the motion sensor; drive the image sensor to recognize a subject; control the AF module so that the lens assembly moves to a first position on the optical axis based on the position of the subject; and control the OIS module to perform OIS based on the movement of the electronic device, the first position of the lens assembly, and the unit correction section of the OIS module.