Dual-Antenna Pen Stylus Layout for Digitizer Compatibility
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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 improved communication and functionality, then compatibility and precision are enhanced, but antenna interference occurs
Solution Approach 1:
An insulating material is introduced as an intermediary between the first and second antennas to prevent electromagnetic interference while allowing both antennas to function simultaneously for improved digitizer compatibility and communication precision
Solution Approach 2:
The harmful electromagnetic interference between antennas is extracted and isolated by positioning antennas at different locations (proximal and distal ends) and using insulating material to separate their electromagnetic fields
2Measurement precision
If antenna size is increased for better signal transmission, then communication precision improves, but pen-stylus weight increases
Solution Approach 1:
The antenna system is segmented into multiple smaller antennas positioned at different locations along the pen-stylus, distributing the total antenna material and reducing overall weight while maintaining communication precision through spatial diversity
3Reliability
If insulating material is added between antennas to prevent interference, then signal quality improves, but device complexity increases
Solution Approach 1:
Insulating material is applied locally only in the regions where antennas are positioned and interference occurs, rather than throughout the entire pen-stylus, minimizing added complexity while ensuring signal quality
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 and precision by ensuring effective communication with digitizers and providing advanced features like force sensitivity and tilt detection.
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 into electrical signals
Data Source
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Figure 5
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.