Miniaturized Rechargeable Capacitive Stylus for Precision Input
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional capacitive touch control devices suffer from lower precision in position detection, hindering smooth operation in applications requiring more precise input, such as handheld devices, due to the lack of precise and efficient detection methods.
Innovation Solution
A miniaturization rechargeable capacitive stylus is designed with a pen-shaped casing, support structure, circuit substrate, sensor module, pen head structure, electrical connector structure, and power supply component, allowing for enhanced precision in position detection by selectively contacting the sensor module and providing power through rechargeable components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional capacitive touch control device uses a finger or simple conductor for input, then the device structure remains simple and manufacturing cost is low, but the position detection precision is insufficient
Solution Approach 1:
The stylus is divided into multiple functional modules: a conductive tip for capacitive coupling, a sensor module for detecting touch position, a power supply component for energy storage, and a support structure for assembly. This segmentation allows each module to perform its specific function efficiently while keeping the overall design manageable
Solution Approach 2:
The stylus integrates multiple functions into a single device: it serves as a capacitive input tool, incorporates a sensor module for enhanced detection, includes a rechargeable power supply for extended usage, and provides structural support through its casing. This multi-functionality resolves the contradiction by delivering high precision without requiring multiple separate devices
2Measurement precision
If an electromagnetic touch control device uses a battery-powered pen, then the position detection precision is improved, but the device requires continuous power consumption and increases operational complexity
Solution Approach 1:
The power supply component enables periodic recharging of the stylus through wireless charging or connection to the portable electronic device. This periodic energy replenishment allows the stylus to maintain operational capability without requiring continuous power draw, resolving the contradiction between precision and energy consumption
Solution Approach 2:
The stylus can recharge itself by connecting to the portable electronic device's power supply through the electrical connector structure. This self-service capability reduces the need for external charging equipment and minimizes operational interruptions, addressing the energy consumption issue while maintaining high detection precision
3Measurement precision
If a resistive touch control device applies significant force on a small area, then the touch input can be detected, but the service life is reduced due to concentrated pressure and deformation
Solution Approach 1:
The stylus replaces the mechanical pressure-based resistive touch system with a capacitive coupling system. The conductive tip creates an electric field that couples with the capacitive touch sensor, eliminating the need for physical deformation and concentrated pressure. This substitution maintains precise touch input detection while significantly extending the service life of the touch control device
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 miniaturization rechargeable capacitive stylus enhances precision in position detection and extends the service life of capacitive touch devices by eliminating the need for concentrated pressure and reducing component costs, while enabling efficient operation in portable electronic devices.
Implementation Method 1
the working principle of a capacitive touch control device relies on capacitive coupling, which takes place as soon as the capacitive touch sensor is touched by a conductive object
Data Source
AI summary
A portable electronic device uses a miniaturization rechargeable capacitive stylus including a pen-shaped casing structure, a support structure, a circuit substrate, a sensor module, a pen head structure, an electrical connector structure, and a power supply component. The pen-shaped casing structure has a retaining convex portion. The electrical connector structure includes a carrier substrate positioned on the support structure and an electrical connector disposed on the carrier substrate, and the electrical connector has an electrical connection portion exposed from the pen-shaped casing structure. When the pen-shaped casing structure is inserted into a receiving space of the portable electronic device, the pen-shaped casing structure is positioned inside the receiving space of the portable electronic device by matching the retaining convex portion of the pen-shaped casing structure and a retaining concave portion that is disposed inside the receiving space of the portable electronic device.