Stylus Electrode Segmentation for Tilt Angle Detection
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Solution Overview
Problem
Current styluses lack effective methods to accurately detect tilt angle and axial direction, leading to limited control options and convenience in touch screen interactions.
Innovation Solution
A stylus design featuring a first electrode at the tip, a second electrode surrounding it, and a third electrode for shielding, with a control module that emits specific electrical signals during different time periods to prevent crosstalk and allow precise detection of tilt angle and axial direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple electrodes are used to detect tilt angle and axial direction, then measurement precision is improved, but device complexity increases due to multiple electrodes and control periods
Solution Approach 1:
The stylus is divided into multiple electrically isolated electrodes (first, second, and third electrodes) with distinct functions. The first electrode detects axial direction, the second electrode detects tilt angle, and the third electrode provides shielding. This segmentation allows each electrode to specialize in a specific detection task, improving overall measurement precision while maintaining manageable complexity through clear functional division.
Solution Approach 2:
The control module implements periodic switching between different time periods: in the first time period, the first electrode emits signals for axial direction detection; in the second time period, the second electrode emits signals for tilt angle detection. This periodic action allows sequential activation of different detection functions, enabling multi-parameter measurement without requiring all electrodes to operate simultaneously, thus managing complexity while achieving comprehensive detection.
2Measurement precision
If electrical signals are emitted continuously for detection, then measurement precision is maintained, but energy consumption increases
Solution Approach 1:
Instead of continuous signal emission, the control module switches between different time periods where only one electrode emits signals at a time. During the first time period, the first electrode emits signals; during the second time period, the second electrode emits signals. This periodic action maintains detection capability while significantly reducing energy consumption compared to continuous emission from all electrodes.
Solution Approach 2:
The control module pre-configures the emission schedule for different electrodes in different time periods. By planning the signal emission sequence in advance, the system ensures that detection precision is maintained through proper timing while avoiding unnecessary energy expenditure from simultaneous or continuous emission. The third electrode is also pre-configured to provide shielding during appropriate periods.
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 accurate detection of tilt angle and axial direction, enhancing user control and convenience by preventing crosstalk and improving signal integrity.
Implementation Method 1
a third electrode surrounding the second electrode, wherein the first electrode and the third electrode are not electrically coupled, the second electrode and the third electrode are not electrically coupled; and a control module connected to the first electrode, the second electrode and the third electrode, wherein the control module is configured to have the first electrode and the second electrode emitting a first-time-period electrical signal and the third electrode connecting to a direct current voltage during a first time period
Data Source
AI summary
The present invention provides a stylus for providing a tilt angle, comprising: a first electrode at a tip of the stylus; a second electrode surrounding the first electrode; a third electrode surrounding the second electrode, wherein the first electrode and the third electrode are not electrically coupled, the second electrode and the third electrode are not electrically coupled; and a control module connecting the first electrode, the second electrode and the third electrode, wherein the control module instructs the first electrode and the second electrode to emit a first-time-period electrical signal during a first time period, and instructs the first electrode and the second electrode to emit a second-time-period electrical signal and the third electrode to float during a second time period.