Writing Film With Rough Layer and Photonic Crystal for Realistic Handwriting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current mobile terminals lack a realistic handwriting experience due to unsupported or poorly implemented handwriting functions, which restrict their usability as electronic learning devices for real-time note sharing between educators and students.
Innovation Solution
A film for writing with a designated surface roughness, incorporating a rough layer and a photonic crystal layer, designed to transmit visible light and reflect infrared light, providing a tactile experience similar to actual handwriting, and featuring a self-curing layer for durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a smooth screen surface is used for writing, then light transmission is improved, but handwriting realism deteriorates
Solution Approach 1:
The screen surface is divided into two distinct regions: a smooth region for optimal light transmission and display quality, and a rough region for realistic handwriting sensation. This local differentiation allows each area to optimize its specific function without compromising the other.
Solution Approach 2:
The writing surface is segmented into multiple regions with different surface characteristics. The smooth region maintains good light transmission for display, while the rough region provides tactile feedback for realistic handwriting. This segmentation resolves the contradiction by distributing different qualities to different spatial locations.
2Ease of operation
If a rough surface is added to improve handwriting feel, then handwriting realism is improved, but light transmission deteriorates
Solution Approach 1:
The rough surface structure is applied locally to specific regions where handwriting interaction occurs, while other regions maintain smooth surfaces for optimal light transmission. This localized application ensures that handwriting realism is enhanced without significantly compromising overall display quality.
Solution Approach 2:
The surface is segmented into rough and smooth zones, allowing the rough texture to be confined to areas where it serves the handwriting function, while smooth areas maintain light transmission efficiency. This spatial separation mitigates the trade-off between the two competing requirements.
3Reliability
If a protective layer is added to enhance durability, then reliability is improved, but tactile sensation deteriorates
Solution Approach 1:
A thin protective film is applied over the rough surface structure. This film is sufficiently thin to preserve the tactile feedback from the underlying rough texture, while simultaneously providing protection against damage and wear, thus enhancing durability without sacrificing handwriting realism.
Solution Approach 2:
The protective layer is designed as a composite structure combining materials with different properties: one layer provides mechanical protection and durability, while another layer maintains surface roughness for tactile feedback. This composite approach allows both durability and tactile sensation to be optimized simultaneously.
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 the handwriting experience on mobile terminals by mimicking the feel of writing on paper, while the self-curing layer ensures durability against external shocks, thereby improving the usability of mobile devices as electronic learning tools.
Implementation Method 1
a photonic crystal layer, arranged on the rough layer, configured to transmit the first light beam and configured to reflect the second light beam
Implementation Method 2
configured to reflect the second light beam
Implementation Method 3
configured to transmit a first light beam and a second light beam of different wavelength bands
Data Source
AI summary
A film for writing may include: a rough layer, including a non-flat surface, configured to transmit a first light beam and a second light beam of different wavelength bands; and/or a photonic crystal layer, arranged on the rough layer, configured to transmit the first light beam and configured to reflect the second light beam. A film for writing, which transmits visible rays, may include: a non-flat layer. A difference between a maximum thickness and a minimum thickness of the non-flat layer may be from about 220 nanometers (nm) to about 2 microns (μm). A film for writing may include: a first layer; and/or a second layer on the first layer. The first layer may be configured to transmit first and second light beams of different frequency bands. The second layer may be configured to transmit the first light beam, but to reflect the second light beam.