Active Pen Stylus Spring Feedback for Paper-Like Writing
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Solution Overview
Problem
Conventional pen-styluses lack the ability to emulate the tactile feedback of writing on conventional paper, which is essential for providing a natural and precise writing experience on digital interfaces.
Innovation Solution
An active pen-stylus that includes a writing shaft and a force sensor to convert physical forces into electronic signals, coupled with a writing spring that deflects geometrically to recreate the paper-like feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional plastic pen-stylus is used on a glass display, then the device can detect pen-down information and coordinate inputs, but the user cannot feel tactile feedback similar to writing on conventional paper
Solution Approach 1:
A paper-like coating layer is applied to the outer surface of the pen-stylus tip, serving as an intermediary between the user's finger and the glass display. This coating layer provides the tactile sensation of writing on paper while allowing the underlying electronic components to function normally for detecting pen-down information and coordinate inputs.
2Measurement precision
If force-sensitive means are added to detect vertical force, then pressure sensitivity is improved, but the device complexity increases
Solution Approach 1:
The paper-like coating layer on the pen-stylus tip serves multiple functions simultaneously: it provides tactile feedback to simulate paper texture, acts as a protective layer for the underlying components, and maintains electrical contact for force detection. This multi-functionality reduces the need for separate dedicated components for each function.
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
The pen-stylus provides a realistic paper-like writing experience by emulating tactile feedback, enhancing user comfort and precision during digital writing tasks.
Implementation Method 1
The geometric deflection produced by the writing spring arises from deformation of the writing spring by the received forces
Implementation Method 2
A writing spring receives forces from the force sensor and reflects back to the user a reactionary force that emulates a paper feeling
Data Source
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AI summary
Embodiments of the invention provide an active pen-stylus that emulates a paper feeling for users of the active pen-stylus. The active pen-stylus comprises a writing shaft that receives physical forces arising from use of the pen-stylus by a user. The active pen-stylus also includes a force sensor that receives forces from the writing shaft, the force sensor configured to convert received forces into an electronic signal. A writing spring receives forces from the force sensor and reflects back to the user a reactionary force that emulates a paper feeling. The writing spring compresses and undergoes geometric deflection in creating the reactionary force that emulates the paper feeling. The geometric deflection produced by the writing spring arises from deformation of the writing spring by the received forces.