Touch Device Charging Traces for Active Stylus Power Management
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Solution Overview
Problem
Users of active styluses for touch devices face inconvenience due to the need to regularly monitor and manage the power supply, as batteries can run out unexpectedly during use.
Innovation Solution
A touch device with a touch operation area, sensor layers, charging traces, and a control unit that forms charging loops to charge the stylus automatically when in use, allowing for unconscious charging without user attention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a battery is provided in the active stylus for power supply, then the stylus can transmit signals and perform touch operations, but the user must regularly monitor and manage the power supply, which causes inconvenience
Solution Approach 1:
The stylus performs self-charging by utilizing the touch device's display panel as a charging surface. When the stylus tip contacts or hovers near the display, electromagnetic induction automatically charges the stylus battery without user intervention, eliminating the need for manual power monitoring and external charging operations
2Reliability
If a battery is provided in the active stylus, then the stylus can function as an active input device with signal transmission capability, but the battery may run out unexpectedly during use
Solution Approach 1:
The charging mechanism operates continuously whenever the stylus is in use on the display surface. The multiplex unit dynamically connects charging traces to form induction charging loops as the stylus moves across the screen, ensuring uninterrupted power replenishment and maintaining continuous operation without battery depletion
3Adaptability or versatility
If multiple charging traces are arranged under the touch operation area, then charging coverage is improved, but the device complexity increases
Solution Approach 1:
The charging system is divided into multiple independent charging traces arranged in arrays under the display. Each trace can be independently controlled by the multiplex unit, allowing selective activation of specific charging segments based on stylus position, thereby achieving comprehensive coverage while maintaining system manageability
Solution Approach 2:
The multiplex unit dynamically configures the charging traces based on real-time stylus position detection. The system adapts the charging loop configuration as the stylus moves across different areas of the display, optimizing charging coverage without requiring all traces to be permanently active, thus reducing overall system 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
Enables continuous use of the stylus by automatically charging it during operation, enhancing user convenience and reducing the risk of power depletion.
Implementation Method 1
the multiplex unit electrically connecting several of the charging traces adjacent to the object based on the position of the object to form at least one charging loop
Data Source
AI summary
A touch device has multiple charging traces distributed under the touch operation area. When the object hovers over or contacts the touch operation area, the control unit of the touch device obtains the corresponding position of the object through the sensing signal of the electrode units. The control unit in turn connect the charging traces adjacent to the corresponding position of the object to form at least one charging loop. In the process of the touch operation on the touch device, the object can be charged at the same time, and the convenience of use can be improved.