Stylus Tilt Detection via Dual Induced Capacitors
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Solution Overview
Problem
Conventional styluses are limited in changing the pattern of input strokes on touch control electronic devices, requiring users to set new patterns through separate interfaces, which is inconvenient.
Innovation Solution
A stylus with a driving circuit, conductive tip, and electrically isolated conductive grip that generates driving signals to form induced capacitors on a touch panel, allowing for the calculation of tilt direction and angle, enabling dynamic adjustment of stroke patterns without additional interface settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional stylus is used to detect touch control coordinates, then the basic touch input function is achieved, but the ability to dynamically change stroke pattern requires additional interface settings which reduces ease of operation
Solution Approach 1:
The stylus performs self-measurement by using its own conductive tip and grip as capacitive sensors to detect its tilt angle and direction relative to the touch panel, eliminating the need for external measurement interfaces or additional setting operations by the user
Solution Approach 2:
The conductive components of the stylus (tip and grip) serve dual functions: they act as electrodes for capacitive touch detection and simultaneously function as sensors for measuring tilt angle and direction, allowing one structure to perform multiple measurement tasks
2Measurement precision
If a stylus with conductive tip and grip is used to form induced capacitors, then tilt detection capability is improved, but the device structure becomes more complex
Solution Approach 1:
The stylus uses its own conductive components (tip and grip) as capacitive sensors to measure its tilt angle and direction, eliminating the need for additional external measurement devices or complex internal sensor systems
Solution Approach 2:
The capacitive coupling between the stylus conductive components and the touch panel serves as an intermediary mechanism that translates physical tilt state into detectable electrical signals without requiring direct mechanical or optical sensors
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 users to change the width and pattern of input strokes on touch control electronic devices by calculating and adjusting the tilt direction and angle of the stylus, enhancing user convenience and input precision.
Implementation Method 1
The conductive tip is capacitively coupled with the touch panel via the driving signal to form a first induced capacitor on the touch panel
Implementation Method 2
A capacitance effect is generated between the conductive grip and the touch panel to form a second induced capacitor on the touch panel
Data Source
AI summary
A stylus adapted to a touch panel is provided. The stylus comprises a barrel, a driving circuit disposed inside the barrel and configured to generate a driving signal, a conductive tip disposed at an end of the barrel and electrically connected to the driving circuit to receive the driving signal, and a conductive grip disposed at the barrel and electrically isolated from the conductive tip. The conductive tip is capacitively coupled with the touch panel via the driving signal to form a first induced capacitor on the touch panel. A capacitance effect is generated between the conductive grip and the touch panel to form a second induced capacitor on the touch panel. A touch control method is also provided.