Camera Lens Anti-Shake Control Under Driving Force Limits
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Solution Overview
Problem
The maximum driving force provided by the driving device of a camera device is often insufficient to meet large anti-shake compensation amounts, leading to a decrease in anti-shake performance.
Innovation Solution
An anti-shake compensation method using a PID control algorithm calculates the compensation amount, sets it to a fixed amount not exceeding a rated threshold, and adjusts the compensation based on image stabilization effects to ensure the driving force meets the required anti-shake performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the anti-shake compensation amount is directly applied to the driving device, then the anti-shake compensation algorithm is simple, but the maximum driving force of the driving device cannot meet large anti-shake compensation amounts, leading to decreased anti-shake performance
Solution Approach 1:
The patent segments the anti-shake compensation process into multiple stages: calculating initial compensation amount, comparing with threshold, and conditionally applying either the calculated amount or a fixed compensation amount. This segmentation allows the system to handle both small and large compensation scenarios optimally, ensuring driving device capabilities are not exceeded while maintaining anti-shake effectiveness.
Solution Approach 2:
The patent introduces dynamic adjustment of the anti-shake compensation amount based on real-time comparison with the rated compensation threshold. The system dynamically switches between using the calculated compensation amount and the fixed compensation amount, adapting to different vibration scenarios while ensuring the driving device operates within its capability limits.
2Force
If the anti-shake compensation amount is limited to a fixed amount not greater than the rated compensation threshold, then the driving force meets the compensation requirements, but the anti-shake compensation amount cannot fully compensate for large vibrations
Solution Approach 1:
The patent applies partial action by using the fixed compensation amount (which is less than or equal to the rated compensation threshold) for large vibrations where full compensation is not feasible, and uses the calculated compensation amount for small vibrations where full compensation can be achieved. This partial application of compensation strategies ensures the driving device operates within its capabilities while maintaining optimal anti-shake performance for each scenario.
Solution Approach 2:
The patent changes the compensation amount parameter dynamically based on the vibration magnitude. When the calculated compensation amount exceeds the rated threshold, the system changes to using the fixed compensation amount parameter, ensuring the driving force remains within safe operational limits while still providing anti-shake protection.
3Reliability
If the rated compensation threshold is set to 70%-80% of the maximum anti-shake amount, then the driving device operates within safe limits, but the anti-shake compensation capability is reduced compared to using the full maximum amount
Solution Approach 1:
The patent establishes a safety buffer by setting the rated compensation threshold at 70%-80% of the maximum anti-shake amount, creating a cushion before the driving device reaches its absolute limit. This beforehand cushioning prevents over-stressing the driving device while maintaining sufficient compensation capability for most practical vibration scenarios.
Solution Approach 2:
The patent accepts partial compensation (using the fixed amount at 70%-80% of maximum) for severe vibrations where full compensation would exceed safe operating limits, while providing full compensation for moderate vibrations. This partial action strategy prioritizes long-term reliability over maximum theoretical compensation capability.
Data Source
AI summary
An anti-shake compensation method, a camera device, and a computer-readable storage medium relate to a field of optical image stabilization are provided. The anti-shake compensation method includes determining, according to sensor data of an actuator in a camera device, whether a lens module where the actuator is located is affected by gravity; when the lens module where the actuator is located is affected by the gravity, determining an anti-shake compensation amount according to a gravity compensation coefficient of the camera device; and performing anti-shake compensation on the lens module where the actuator is located in the camera device according to the anti-shake compensation amount. The anti-shake compensation amount overcomes an influence of the gravity. The influence of the gravity in an anti-shake process is considered, so as to improve an anti-shake capability of the camera device and further improve stability of an image.