Electrophoretic Display Frame Welding Impact Resistance
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Solution Overview
Problem
Electrophoretic displays face challenges in achieving impact resistance and weather resistance while maintaining thinness and lightness, as thicker impact-damping layers compromise their original advantages, and they are susceptible to damage from temperature and humidity changes, especially when used outdoors.
Innovation Solution
The solution involves an electrophoretic display module with a frame member integrated with protective sheets, an air layer with higher pressure than the ambient atmosphere, and an impact-damping member to enhance impact resistance, along with a moisture-proof configuration to prevent degradation from humidity, ensuring the display remains thin and durable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thicker impact-damping layer is used to improve impact resistance, then the display becomes more durable, but the thickness and weight increase, compromising the original advantages of thinness and lightness
Solution Approach 1:
The impact-damping layer is nested within the glass substrate structure, positioned between the glass substrate and the electrophoretic display module. This nested configuration allows the damping layer to be integrated into the existing structure without adding external thickness, thereby maintaining impact resistance while preserving the thin profile of the display.
Solution Approach 2:
The impact-damping layer is applied locally at specific positions where impact resistance is most needed, rather than uniformly across the entire display. This localized application provides targeted protection while minimizing the overall thickness and weight increase, addressing the contradiction between durability and thinness at critical locations only.
2Weight of moving object
If the glass substrate thickness is reduced to decrease weight, then the display becomes lighter, but the strength and resistance to bending stress decrease
Solution Approach 1:
The display structure uses composite materials combining the glass substrate with the impact-damping layer and other support structures. This composite configuration allows the glass substrate to be made thinner and lighter while the damping layer and additional structures provide the necessary strength and bending resistance, resolving the contradiction between weight reduction and strength maintenance.
3Length of moving object
If the impact-damping layer thickness is minimized to maintain thinness, then the display remains thin, but the microcapsules would be damaged due to insufficient impact absorption
Solution Approach 1:
The impact-damping layer is nested within the glass substrate structure, allowing it to provide protection to the microcapsules without adding significant external thickness. The nested position between the glass substrate and the electrophoretic display module enables effective impact absorption while maintaining the overall thin profile of the display.
Solution Approach 2:
The impact-damping layer is positioned at specific locations where impact protection is most critical for the microcapsules, providing targeted protection with minimal thickness. This localized approach ensures adequate impact absorption where needed while maintaining overall thinness of the display structure.
4Weight of moving object
If the display is made thinner and lighter to maintain original advantages, then the display becomes more portable, but it becomes vulnerable to external impact and less durable
Solution Approach 1:
The impact-damping layer is nested within the existing thin structure of the display, allowing the display to remain thin and lightweight while incorporating protection against external impacts. This nested configuration enables the display to maintain its portable characteristics while gaining enhanced durability without significant weight penalty.
Solution Approach 2:
The display uses composite material structures combining thin glass substrate with impact-damping layers and other protective elements. This composite approach allows the display to maintain thinness and lightness for portability while the composite structures provide the necessary durability and impact resistance, resolving the contradiction between portability and durability.
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 configuration provides a thin electrophoretic display with improved impact resistance and weather resistance, preventing damage from impacts and environmental changes while maintaining the display's original thin and lightweight characteristics.
Implementation Method 1
The frame member is integrated with the first and second protective sheets by welding the frame member to the first protective sheet and to the second protective sheet
Implementation Method 2
a space filled with an air layer is preferably provided between the electrophoretic display module and the frame member, and the air layer preferably has a higher pressure than an ambient atmosphere
Implementation Method 3
An electric field generated by applying a voltage between the electrodes changes the distribution of the charged particles, thus providing a contrast
Implementation Method 4
an impact-damping member to enhance impact resistance
Data Source
AI summary
An electrophoretic display includes an electrophoretic display module including an element substrate, a counter substrate disposed on a display side of the element substrate, and an electrophoretic layer held therebetween; a first protective sheet disposed on a counter substrate side of the electrophoretic display module; a second protective sheet disposed on an element substrate side of the electrophoretic display module so as to face the first protective sheet with the electrophoretic display module disposed therebetween; and a frame member disposed between the first and second protective sheets along the periphery thereof so as to surround the electrophoretic display module. The frame member is integrated with the first and second protective sheets by welding the frame member to the first protective sheet and to the second protective sheet.