Adjustable Digital Eraser Antenna for Stylus Tilt Control
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Solution Overview
Problem
Conventional styluses lack the ability to vary the size and opacity of the erased area on touch-screens, limiting the precision and control of digital erasure functions.
Innovation Solution
A stylus with a digital eraser antenna at its tail end, which adjusts signal strength and surface contact area to allow for precise control over erasure functions, including fine pixel erasure and broad stroke erasure, based on tilt and rotation, enabling the computing device to detect and respond to these changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional stylus eraser is used, then the basic erasing function is provided, but the ability to vary the size and opacity of the erased area is limited
Solution Approach 1:
The patent applies the dynamics principle by making the eraser functionality adjustable and variable through tilt and rotation of the stylus. The eraser size and opacity dynamically change based on the stylus orientation, allowing users to switch between fine pixel erasure and broad stroke erasure without changing the physical stylus structure.
Solution Approach 2:
The patent changes physical parameters (tilt angle and rotation angle) to control erasure characteristics. By varying the stylus tilt and rotation, the system adjusts the eraser size and opacity parameters, enabling multiple erasure modes from a single stylus design.
2Measurement precision
If the stylus structure is made more complex to enable variable erasure control, then erasure precision is improved, but the device becomes more complicated
Solution Approach 1:
The patent replaces complex mechanical adjustment mechanisms with a wireless communication-based system. Instead of mechanical sliders or switches to control eraser size, the stylus uses electromagnetic signals to communicate tilt and rotation data to the computing device, which then adjusts erasure parameters software-based.
Solution Approach 2:
The system creates a digital representation of the stylus physical state (tilt and rotation) and uses this virtual copy to control erasure characteristics. The physical stylus geometry is translated into digital control parameters, allowing precise erasure control without physical complexity.
3Ease of manufacture
If the antenna is positioned symmetrically in the stylus tail end, then manufacturing is simplified, but the ability to detect tilt and rotation accurately is reduced
Solution Approach 1:
The patent applies asymmetry by positioning the antenna at an offset location within the stylus tail end rather than at the center. This asymmetric placement creates different signal strengths based on tilt and rotation angles, enabling the system to detect the stylus orientation and control erasure precision accordingly.
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 precise and variable erasure capabilities, allowing for both fine and broad strokes, and adjusting opacity, enhancing user control over digital ink removal on touch-screens.
Implementation Method 1
a digital eraser incorporating a tail end having a digital eraser that outputs an erasing signal from an antenna positioned within the tail end
Data Source
Figure 1
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AI summary
The structure and devices described herein provide an improved digital eraser for a stylus. A stylus may have an eraser end that transmits an erase signal from an eraser antenna. A cover houses the eraser antenna and can be configured with varying geometry to selectively position the eraser antenna closer to, or further away from, a digitizer screen of a computing device when the cover is in contact with the digitizer screen. The computing device can detect the signal strength of the erase signal and/or the contact area between the cover and the digitizer screen and vary one or more of the width, area, or opacity of the erase function. The computing device can further, based upon the strength of the signal and/or the contact area between the cover and the digitizer screen, determine the tilt and/or the rotation of the stylus.