Haptic Feedback System With Magnetic Position Sensing
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Solution Overview
Problem
Conventional portable electronic devices are unable to execute optimal haptic feedback due to degradation of feedback components, such as springs, which prevents them from accurately reflecting the current state and delivering multiple overlapping haptic feedback events effectively.
Innovation Solution
A haptic feedback system in a portable electronic device that includes a mass coupled to a magnetic element and variable magnetic elements, allowing for the generation of a magnetic field that displaces the mass based on processor instructions, with a magnetic field sensor detecting the mass's position to adjust subsequent haptic feedback events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional haptic feedback components are used without position sensing, then the device structure remains simple, but the haptic feedback cannot compensate for component degradation and cannot execute multiple overlapping events accurately
Solution Approach 1:
The patent implements a feedback mechanism where a magnetic field sensor detects the position of the movable mass and provides this information back to the processor. The processor then adjusts subsequent haptic feedback events based on the detected position, creating a closed-loop system that compensates for component degradation and enables accurate execution of multiple overlapping haptic events.
Solution Approach 2:
The patent replaces traditional mechanical position sensing mechanisms with a magnetic field-based sensing system. The magnetic field sensor non-contactively detects the position of the movable mass by sensing changes in the magnetic field, eliminating the need for complex mechanical encoders or contact-based sensors.
2Duration of action of stationary object
If component degradation is not monitored, then the system operates continuously, but the haptic feedback quality deteriorates over time
Solution Approach 1:
By continuously monitoring the position of the movable mass through the magnetic field sensor, the system detects changes in component characteristics over time. The processor uses this feedback information to adjust haptic feedback parameters, compensating for spring degradation and maintaining consistent haptic quality throughout the component's service life.
Solution Approach 2:
The system performs self-diagnosis and self-adjustment by monitoring its own component state through the magnetic field sensor. The processor automatically compensates for degradation without external intervention, allowing the system to maintain optimal performance throughout its operational lifetime.
3Productivity
If multiple haptic feedback events are executed without position awareness, then user interactions are responsive, but subsequent events cannot be optimized based on current mass position
Solution Approach 1:
The magnetic field sensor provides real-time position feedback of the movable mass during haptic event execution. The processor uses this feedback to optimize subsequent haptic events by adjusting their timing, amplitude, and duration based on the current mass position, ensuring optimal haptic perception while maintaining rapid response to user interactions.
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
Enables the execution of multiple haptic feedback events by determining the position of the movable mass, ensuring optimal and accurate haptic feedback perception despite component degradation, allowing for seamless integration of user and device-initiated requests.
Implementation Method 1
variable magnetic elements capable of establishing a magnetic field in communication with the magnetic element that varies in accordance with instructions received from the processor... where the magnetic field causes displacement of the magnetic element
Implementation Method 2
a magnetic field sensor in communication with the processor, wherein the magnetic field sensor is capable of (i) detecting a change in the magnetic field that is induced by the displacement of the magnetic element, and (ii) providing a detection signal to the processor that corresponds to a current position of the mass
Data Source
AI summary
According to some embodiments, an electronic device can include a processor and a haptic feedback system. The haptic feedback system can include a mass that is coupled to a magnetic element and variable magnetic elements capable of establishing a magnetic field in communication with the magnetic element that varies in accordance with the processor receiving a signal that indicates that a touch event is detected at a touch sensitive layer, where the magnetic field causes displacement of the magnetic element. The haptic feedback system can further include a magnetic field sensor in communication with the processor, where the magnetic field sensor is capable of (i) detecting a change in the magnetic field that is induced by the displacement of the magnetic element, and (ii) providing a detection signal to the processor that corresponds to a current position of the mass that is coupled to the magnetic element.