Active Pen Pressure Sensing Grip for Screen Wear Reduction
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Solution Overview
Problem
Existing active pen systems compromise user grip and control, and cause wear on both the pen tip and display screens, especially OLEDs, due to the need for physical pressure engagement with the screen to sense pressure for ink intensity, which is problematic for virtual touch screens that do not require physical contact.
Innovation Solution
An active pen system with a pressure sensing system on its outer surface, allowing users to apply pressure to the pen itself rather than the screen, capturing force and location data to provide input to a graphical user interface without requiring direct screen engagement, enabling varying ink intensity and gestures without physical contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the pen tip is configured to read pressure when engaged with the display screen, then the system can provide pen-on-paper experience with variable ink intensity, but the user's grip and control ability is compromised
Solution Approach 1:
A pressure-sensitive gripping element is introduced as an intermediary component on the pen body. This element allows users to apply pressure to control ink intensity without needing to press the pen tip against the display screen with excessive force, thereby maintaining both measurement precision and ease of operation
Solution Approach 2:
The system replaces the mechanical pressure sensing at the pen tip with an electronic pressure-sensitive gripping element on the pen body. This substitution allows for more accurate and controlled pressure detection while improving ergonomics and user control
2Adaptability or versatility
If pressure is applied through the pen tip to the display screen to determine ink intensity, then the system can simulate conventional drawing tools, but wear on the pen tip and display screen increases
Solution Approach 1:
The pressure-sensitive gripping element acts as a mediator that transfers the user's pressure input to the system without requiring direct high-force contact between the pen tip and display screen, thereby reducing wear on both components while maintaining the pen-on-paper experience
Solution Approach 2:
Instead of sensing pressure at the pen tip contact point with the screen, the system inverts the approach by placing the pressure-sensitive gripping element on the pen body, allowing pressure to be applied away from the vulnerable tip and screen interface
3Measurement precision
If the pen tip must physically engage the display screen to sense pressure, then pressure input can be detected, but the functionality is defeated on touchless or virtual display screens
Solution Approach 1:
The pressure-sensitive gripping element provides universal pressure input capability that works with both traditional contact-based displays and touchless/virtual displays. The element detects pressure on the pen body regardless of whether the display screen requires physical contact, enabling the pen to function across multiple display types
Solution Approach 2:
The system replaces reliance on mechanical contact between pen tip and screen with an electronic pressure sensing mechanism on the pen body, enabling compatibility with touchless and virtual display screens that do not require physical engagement
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
This solution enhances user control and reduces wear on screens by allowing pressure adjustments on the pen, enabling effective input on both physical and virtual touch screens without damaging them, and expanding the pen's functionality beyond traditional touch input devices.
Implementation Method 1
a pressure sensing system that includes a pressure sensitive gripping element that is accessible on at least a portion of an outer surface of the pen
Data Source
AI summary
An active pen includes a pen chassis including a pen tip and a pressure sensitive gripping element that is accessible on at least a portion of an outer surface of the pen chassis. The pen chassis houses a communication system, a processor, and a memory that includes instructions that, when executed by the processing system, causes the processing system to provide a pressure input engine that is configured to capture first force data and first location data generated by a first user interaction with the pressure sensitive gripping element at a first time. The pressure input engine then uses the first force data and first location data to provide an input to a graphical user interface provided on a display screen of a computer device.