Elastic Pen Input Sheet for Pencil-on-Paper Writing Feel
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Solution Overview
Problem
Existing pen input devices fail to replicate the writing feel of using a pen on paper, such as with a pencil on copy paper, as they lack the ability to match the desired writing feel of a specific writing material and medium combination.
Innovation Solution
A pen input device sheet with an elastic material layer having a specific vibration frequency characteristic that matches the kinetic friction coefficient of a desired writing material and medium, such as a pencil on copy paper, to replicate the writing feel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the writing feel is adjusted by controlling the recessed-protruding shape of the sheet surface, then the writing feel is improved, but it is impossible to reproduce the feeling of paper being hollowed when writing is executed on paper with a pen
Solution Approach 1:
The patent changes the physical parameters of the sheet surface by forming a recessed-protruding pattern with specific geometric characteristics (depth, width, spacing) to replicate the friction and tactile feedback of paper hollowing. The pattern is designed with protrusions that rise from the sheet surface to create localized resistance points that mimic the hollowing effect of traditional paper writing.
Solution Approach 2:
The patent creates a simplified model or copy of the complex paper hollowing phenomenon by using a controlled recessed-protruding pattern. Instead of using actual paper that hollows during writing, the patent fabricates a synthetic surface structure that reproduces the essential tactile characteristics of paper hollowing in a controlled and repeatable manner.
2Ease of operation
If coating with soft resin is executed for the sheet surface, then the writing feel is improved, but it is impossible to solve the problem of reproducing paper hollowing feeling
Solution Approach 1:
The patent applies local quality by creating a recessed-protruding pattern that provides differentiated surface characteristics in specific locations. The protrusions are strategically positioned to create localized friction points that mimic the hollowing effect, while the rest of the sheet surface maintains its base properties. This localized modification allows the sheet to reproduce paper hollowing feeling without requiring full-surface soft resin coating.
3Ease of operation
If a writing feel improving layer with spherical fine particles is used, then the writing feel is improved, but it is impossible to obtain a writing feel equivalent to using a pencil on copy paper
Solution Approach 1:
The patent changes the geometric parameters of the sheet surface by forming a recessed-protruding pattern with specific depth, width, and spacing characteristics. These parameters are carefully controlled to match the friction and tactile feedback characteristics of pencil on copy paper. The protrusions are designed with specific dimensional ratios and distributions that replicate the writing feel of traditional pencil writing on copy paper.
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 input device sheet provides a writing feel equivalent to using a pencil on paper by matching the vibration frequency characteristics of the kinetic friction coefficient, allowing for a similar writing experience.
Implementation Method 1
a vibration frequency characteristic of a kinetic friction coefficient when the electronic pen is moved at a predetermined speed on the writing input surface of the pen input device sheet matches the vibration frequency characteristic of the kinetic friction coefficient when a predetermined writing material is moved at the predetermined speed on a predetermined writing medium
Data Source
AI summary
Provided is a pen input device sheet disposed over a position detection region of a position detecting sensor, the pen input device sheet including an elastic material layer that is composed of a plurality of layer portions stacked in a thickness direction and has elasticity, an opposite side of a side of the position detecting sensor in the elastic material layer being employed as a side of a writing input surface to which writing input with an electronic pen is made, and the pen input device sheet being configured such that a vibration frequency characteristic of a kinetic friction coefficient when the electronic pen is moved at a predetermined speed on the writing input surface of the pen input device sheet matches a vibration frequency characteristic of a kinetic friction coefficient when a predetermined writing material is moved at the predetermined speed on a predetermined writing medium.