Optical Element Drive IC for Quiet High-Speed Position Control
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Solution Overview
Problem
Existing IC chip technologies for image-capturing apparatuses face challenges in effectively suppressing sound generated during the driving of optical elements, which can affect the quality of both images and audio recordings.
Innovation Solution
The implementation of a driving mechanism control unit integrated into the same IC chip as the magnetic sensor, which generates a control signal to move the optical element to a target position while suppressing sound. This is achieved through PID control and the use of correction coefficients based on the relationship between sound magnitude and optical element position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the optical element is driven at high speed to improve response time, then the convergence time is reduced, but sound generation increases
Solution Approach 1:
The system performs preliminary actions by predicting future positions of the optical element and pre-calculating correction coefficients for upcoming driving phases. The generation unit predicts position information in advance and determines appropriate correction coefficients before the actual driving occurs, allowing high-speed operation with sound suppression already prepared.
Solution Approach 2:
The system dynamically adjusts correction coefficients based on real-time position information and predicted future positions. The generation unit continuously updates correction coefficients as the optical element moves, adapting the sound suppression strategy to the current driving phase while maintaining high driving speed.
2Manufacturing precision
If PID control is used to improve positioning accuracy, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The generation unit merges multiple functions into a single integrated component: it performs PID control calculations, predicts future position information, determines correction coefficients, and generates control signals all within one unit. This consolidation maintains positioning accuracy while reducing overall system complexity by eliminating separate components for each function.
Solution Approach 2:
The generation unit is designed as a multi-functional component that handles PID control, position prediction, correction coefficient determination, and control signal generation. This universal unit serves multiple purposes simultaneously, improving positioning accuracy without proportionally increasing device complexity.
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 reduces sound generation during optical element driving, allowing for high-speed and quiet operation of image stabilization and focusing controls in image-capturing apparatuses, thereby enhancing user experience.
Implementation Method 1
This is achieved through PID control and the use of correction coefficients based on the relationship between sound magnitude and optical element position.
Implementation Method 2
a driving mechanism control unit integrated into the same IC chip as the magnetic sensor
Data Source
AI summary
An IC chip that controls a driving mechanism that drives an optical element based on a control signal is provided. The IC chip comprises a generation unit that generates the control signal for moving the optical element to a target position while suppressing sound generated due to the driving by the driving mechanism, based on a detection signal indicating a position of the optical element and relationship information indicating a relationship between an index corresponding to a magnitude of the sound generated due to the driving by the driving mechanism and a position of the optical element.