Stylus with Integrated Capacitive Touch and Wireless Charging
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Solution Overview
Problem
Existing styluses for electronic devices are limited in providing expanded input capabilities and require mechanical coupling for charging, which can impose mechanical stresses and restrict user interaction.
Innovation Solution
A stylus with integrated capacitive touch input, magnetic coupling, and wireless charging capabilities, allowing for tactile input detection, magnetic interaction with a host device, and power reception without mechanical connections, thereby enhancing user experience and input flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If mechanical coupling is used for charging the stylus, then power can be transferred to the stylus, but mechanical stresses are imposed and user interaction is restricted
Solution Approach 1:
The patent replaces the mechanical coupling system with a wireless power transfer system using electromagnetic fields. The stylus includes a wireless power receiver that can wirelessly receive power from a power source, eliminating the need for mechanical connections during charging and allowing free user interaction without mechanical stress constraints
2Volume of moving object
If the stylus structure is made compact, then it is more portable and easier to handle, but integrating multiple input capabilities becomes more difficult
Solution Approach 1:
The patent combines multiple input capabilities (capacitive touch input, magnetic coupling, and wireless charging) into a single integrated stylus structure. The housing integrates capacitive touch sensors on its surface, magnetic coupling components for attachment, and a wireless power receiver for charging, all within a compact form factor that maintains portability while providing expanded input functionality
Solution Approach 2:
The stylus housing serves multiple functions simultaneously: it provides structural support, contains capacitive touch sensors for input detection, incorporates magnetic coupling components for device attachment, and includes a wireless power receiver for charging. This multi-functionality allows the compact stylus to provide expanded input capabilities without requiring separate devices
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 stylus provides expanded input capabilities, secure assembly, accurate touch detection, and reduced mechanical stress through capacitive touch and wireless charging, improving user interaction and device functionality.
Implementation Method 1
The touch sensor can include capacitive sensing devices that detect contact by measuring changes in capacitance
Implementation Method 2
The stylus can include magnetic coupling components that enable magnetic coupling to a host device
Implementation Method 3
The stylus can include wireless power receiver components that enable wireless power reception from a power source
Data Source
AI summary
Touch-based input devices, such as a stylus, can receive tactile input from a user. The tactile input functions can be performed by a touch sensor, such as a capacitive sensing device. A touch sensor can be integrated into a stylus in a low profile form. Wireless charging and magnetic coupling with a host device are also facilitated. The stylus can be provided with the above features in a small form factor that improves a user experience with the stylus.