Dual-Antenna Stylus Tip Layout for Interference-Free Force Sensing
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Solution Overview
Problem
Conventional pen-styluses face compatibility issues with digitizers due to differing communication protocols, and there is a need for improved precision and additional functionality in active pen-styluses.
Innovation Solution
A pen-stylus design featuring a first and second antenna with an insulating material between them, allowing for precise signal transmission and interference prevention, along with a force sensor to convert axial forces into electrical signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are used in the pen-stylus for enhanced functionality and precision, then communication capability and feature set are improved, but signal interference between antennas increases
Solution Approach 1:
An insulating material is positioned between the first and second antennas to act as an intermediary that blocks electromagnetic signal interference while allowing both antennas to maintain their communication functions. This mediator enables multi-functionality without the harmful side effect of signal interference.
2Measurement precision
If the pen-stylus is designed with force sensitivity and tilt detection capabilities, then precision and functionality are improved, but device complexity increases
Solution Approach 1:
The pen-stylus is designed to perform multiple functions including force sensitivity detection, tilt detection, and communication through multiple antennas within a single device structure. This multi-functionality approach integrates various sensing and communication capabilities into one unified tool, improving precision without requiring separate devices for each function.
3Measurement precision
If the first antenna is positioned at the proximal end for optimal signal transmission, then communication precision is improved, but antenna interference with the display increases
Solution Approach 1:
The insulating material serves as a mediator that allows the first antenna to be positioned at the proximal end for optimal signal transmission while blocking its electromagnetic interference from affecting the display. This enables precise communication without the harmful side effect of display interference.
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
Enhances compatibility with various digitizers and provides improved precision and functionality, including force sensitivity and tilt detection, through effective signal transmission and interference mitigation.
Implementation Method 1
an insulating material between the first antenna and the second antenna that prevents interference between the first antenna and the second antenna
Implementation Method 2
a force sensor to convert axial forces received by engagement of the pen-stylus with the display on the tablet to electrical signals
Data Source
AI summary
Embodiments of the invention provide a pen-stylus that comprises a first antenna having a hemispherical shape at a proximal end of the pen-stylus where the pen-stylus engages with a display of a tablet device. The pen-stylus also includes a second antenna, wherein the first antenna and the second antenna communicate with the tablet device to enable a pen-stylus user to draw on the display of the tablet device. The pen-stylus additionally includes an insulating material between the first antenna and the second antenna that prevents interference between the first antenna and the second antenna. In some embodiments, the first antenna and the insulating material reside in a marker tip attached to the pen-stylus, the marker tip transmits axial forces received by engagement of the pen-stylus with the display on the tablet to a force sensor. The pen-stylus further includes a force sensor that converts axial forces received from the marker tip into an electrical signal and transmits the electrical signal to the tablet by at least one of the first antenna and the second antenna.