Wireless Power Receiver Touchscreen Interference Control
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Solution Overview
Problem
Wireless charging systems often cause interference with touchscreens of electronic devices, leading to false contacts and operational issues, as the magnetic or electromagnetic fields can incorrectly register interactions.
Innovation Solution
A wireless power device equipped with a sensor circuit to detect signals from the touchscreen and a processor to determine if they are caused by false contacts due to the charging field, transmitting a message to adjust the charging field's strength to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wireless charging field strength is increased to improve charging efficiency, then charging power is improved, but touchscreen false contact interference increases
Solution Approach 1:
The patent implements dynamic adjustment of wireless charging field strength based on real-time touchscreen interference detection. The system continuously monitors touchscreen signals and adjusts the charging field strength accordingly, transitioning from static to dynamic operation to resolve the contradiction between charging efficiency and touchscreen interference.
Solution Approach 2:
The patent establishes a feedback loop where touchscreen sensor circuits detect false contact signals and feed this information back to the wireless charging control system. The system processes this feedback and adjusts the charging field strength to eliminate interference while maintaining charging efficiency,实现ing closed-loop control.
2Reliability
If wireless charging field strength is decreased to reduce touchscreen interference, then touchscreen performance is improved, but charging efficiency deteriorates
Solution Approach 1:
The system dynamically adjusts the wireless charging field strength based on real-time touchscreen interference levels. When interference is detected, the field strength is temporarily reduced to maintain touchscreen performance, then restored when interference subsides, optimizing both reliability and productivity dynamically.
Solution Approach 2:
The patent implements periodic monitoring of touchscreen signals during wireless charging operation. The system checks for false contact signals at regular intervals and adjusts the charging field strength in periodic cycles, allowing the system to maintain touchscreen performance while ensuring adequate charging efficiency over time.
3Measurement precision
If touchscreen sensitivity is increased to improve user interaction detection, then interaction detection accuracy is improved, but false contact from wireless charging field increases
Solution Approach 1:
The patent applies preliminary anti-action by detecting the characteristic patterns of wireless charging field interference before they register as false user interactions. The system identifies and filters out these predetermined interference patterns from the touchscreen sensor signals, preventing them from being processed as valid touch inputs.
Solution Approach 2:
The touchscreen control system receives feedback about detected signals and uses this information to distinguish between genuine user touches and false contacts caused by wireless charging interference. The system processes this feedback to selectively filter false contact signals while preserving accurate touch detection, maintaining high measurement precision.
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
Effectively reduces false touch occurrences, maintaining optimal touchscreen performance while ensuring efficient charging by dynamically adjusting the wireless charging field's strength based on detected interference.
Implementation Method 1
a wireless charging field of a wireless charging device
Implementation Method 2
a sensor circuit configured to detect at least one signal from a touchscreen
Data Source
AI summary
This application describes methods and apparatus for controlling touchscreen interferences. In one aspect, a wireless power device for receiving charging power via a wireless charging field of a wireless charging device is provided. The wireless power device comprises a sensor circuit configured to detect at least one signal from a touchscreen, the detected at least one signal indicating an interaction with the touchscreen. The wireless power device further comprises a processor circuit configured to determine whether the detected at least one signal is a result of a false contact with the touchscreen resulting from the wireless charging field. The wireless power device further comprises a transmitter circuit configured to transmit, based on determining that the detected at least one signal is a result of the false contact with the touchscreen, a first message to the wireless charging device to lower a strength of the wireless charging field.