Reflection Module Guide Groove Asymmetry for Stable Carrier Rotation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional camera modules in mobile devices face issues with inconsistent driving performance due to the high degree of freedom of ball bearings, which affects the rotation of reflection members, leading to variability in performance based on the ball bearing's position.
Innovation Solution
A reflection module design featuring a housing with guide grooves of varying slopes and asymmetrical configurations for ball members to stabilize the rotation of a carrier, ensuring consistent performance by controlling the movement of ball bearings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a ball bearing is used to support rotation of the reflection member, then the reflection member can rotate with relatively small force, but the driving performance varies depending on the position of the ball bearing due to its high degree of freedom
Solution Approach 1:
The patent applies asymmetry by providing guide grooves with different slope angles on opposite sides of the rotation module. Specifically, one guide groove has a first slope angle while the opposite guide groove has a second slope angle that is different from the first, creating an asymmetric structure that compensates for the high degree of freedom of ball bearings and ensures consistent driving performance across different positions
Solution Approach 2:
The patent implements local quality by making each guide groove have a specific slope angle tailored to its position. The guide grooves are not uniform but have locally optimized slope angles that account for their specific locations and the forces acting on them, thereby achieving overall rotational consistency despite the inherent variability of ball bearing positions
2Reliability
If guide grooves with different slope angles are provided, then driving performance consistency is improved, but the structural complexity increases
Solution Approach 1:
The asymmetric guide groove configuration is implemented directly in the structure, where guide grooves at different positions have different slope angles. This asymmetric design achieves consistent driving performance by compensating for positional variations of ball bearings, while the complexity is managed by integrating the guide grooves into the existing housing and rotation module structures
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 provides stable and consistent optical image stabilization and auto focus functions by maintaining precise rotational control of reflection and lens modules, enhancing camera module performance.
Implementation Method 1
The two side surfaces contact one ball member of the plurality of ball members accommodated in a corresponding one of the one or more guide grooves
Data Source
AI summary
A reflection module includes a housing having an internal space; a reflection member disposed in the internal space; a carrier rotatably disposed with the reflection member in the internal space; and a plurality of ball members disposed between the housing and the carrier to support rotation of the carrier. The carrier and the housing include a plurality of guide grooves disposed to face each other. one or more guide grooves, among the plurality of guide grooves, include two side surfaces having different slopes with respect to a plane perpendicular to a rotational axis of the carrier. The two side surfaces contact one ball member of the plurality of ball members accommodated in a corresponding one of the one or more guide grooves.