Rechargeable Capacitive Stylus with Rotating Connector
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Solution Overview
Problem
Capacitive touch control devices face challenges with lower precision in position detection, hindering smooth operation in applications requiring more precise input, such as handheld devices, and there is a need for a more efficient and cost-effective input method.
Innovation Solution
A rechargeable capacitive stylus with a pen-shaped casing, rotatable ring, support structure, circuit substrate, sensor module, pen head structure, and electrical connector structure, which includes a chargeable power supply component and rotatable connectors for easy charging, enhancing precision and longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a capacitive touch control device is used without a specialized pen, then the device has longer service life and lower cost, but position detection precision is lower
Solution Approach 1:
The patent introduces a capacitive stylus pen as an intermediary tool between the user and the capacitive touch screen. The stylus pen with its conductive tip enhances the capacitive coupling effect, allowing for more precise position detection while maintaining compatibility with standard capacitive screens. This mediator enables fine-grained input without requiring specialized hardware modifications to the screen itself.
Solution Approach 2:
The patent changes the electrical parameters of the input device by using a capacitive stylus that modifies the capacitance distribution on the screen surface. The stylus pen alters the capacitive field characteristics, enabling precise detection of touch position through variations in capacitance measurements, thereby improving measurement precision without changing the screen hardware.
2Measurement precision
If a resistive touch control device is used, then position detection can be achieved, but significant force must be applied and the device has shorter service life
Solution Approach 1:
The patent replaces the mechanical pressure-based resistive touch system with an electrical field-based capacitive touch system. Instead of requiring physical deformation of a resistive layer through applied force, the capacitive stylus utilizes electrical capacitance coupling to detect touch positions, eliminating the need for significant mechanical pressure and thereby extending device service life.
3Ease of operation
If an electromagnetic touch control device is used, then input can be achieved, but a special battery-powered pen is required
Solution Approach 1:
The patent extracts the power source requirement from the input device by using a passive capacitive stylus that does not require an internal battery. The capacitive stylus leverages the user's body or a simple conductive tip to create the necessary electrical field interaction with the capacitive screen, eliminating the need for a powered pen while maintaining full input functionality.
4Ease of manufacture
If conventional capacitive touch devices are used, then construction is simple and cost is lower, but position detection precision is insufficient for handheld devices
Solution Approach 1:
The patent introduces a capacitive stylus as an intermediary tool that enhances the capabilities of conventional capacitive touch screens without requiring changes to the screen's simple construction. The stylus pen acts as a mediator that improves position detection precision while the screen itself maintains its straightforward capacitive layer structure, preserving ease of manufacture.
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 rechargeable capacitive stylus provides enhanced precision in position detection and longer service life while reducing costs through its simple construction and efficient power management, addressing the limitations of conventional capacitive touch 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, and the touch position can then be identified according to the variation in capacitance at the touch point
Data Source
AI summary
A rechargeable capacitive stylus includes a pen-shaped casing structure, a sensor module, a pen head structure, and an electrical connector structure. The pen-shaped casing structure has a pen casing, a rotatable ring rotatably disposed around the pen casing, and a pen holder adjacent to the rotatable ring. The sensor module is disposed inside the pen-shaped casing structure. The pen head structure is movably disposed inside the pen-shaped casing structure to selectively contact the sensor module. The electrical connector structure is disposed inside the pen-shaped casing structure. The electrical connector structure includes a first electrical connector electrically connected to a power supply, and the first electrical connector has a first electrical connection portion. The pen casing has a first fixed opening for exposing the first electrical connection portion, and the rotatable ring has a movable opening that is moved relative to the pen casing or the pen holder.