Foldable Display Bottom Layer Coating for Stress Relief
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Solution Overview
Problem
Flexible display devices face challenges in minimizing damage and stress when folded, folded, or slid, as existing designs do not adequately protect the display panel during these operations.
Innovation Solution
A display device design featuring a protective coating layer on a bottom layer that includes a slip coating or anti-static layer, which contacts various members such as support and base members, helping to distribute stress and prevent damage during folding and sliding operations, while maintaining a flexible display panel with varying curvature states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display panel is made flexible to enable folding and sliding functions, then the adaptability and versatility of the device is improved, but the reliability and resistance to damage deteriorates due to stress concentration during folding operations
Solution Approach 1:
A protective coating layer is applied in advance to the bottom layer of the display panel, specifically covering the non-attached portion that will contact foldable members during operation. This pre-applied coating acts as a cushioning layer that prevents direct contact and damage between the bottom layer and foldable members during folding and sliding operations, thereby improving reliability while maintaining the flexible form factor
2Ease of operation
If the bottom layer is directly attached to foldable members to enable movement, then the ease of operation is improved, but the stress concentration and potential damage to the display panel increases
Solution Approach 1:
The protective coating layer serves as an intermediary substance between the bottom layer and the foldable members. Instead of direct attachment causing stress concentration, the coating layer mediates the interaction, allowing the bottom layer to contact and move with foldable members while distributing stress and preventing damage, thus maintaining ease of operation without compromising strength
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 solution effectively reduces stress and damage to the display panel by distributing forces through the protective coating layer, allowing for smooth transitions between unfolded, folded, and sliding states without compromising the panel's flexibility or visibility.
Implementation Method 1
The protective coating layer may include at least one of a slip coating layer or an AS (anti-static) coating layer
Implementation Method 2
The protective coating layer may include at least one of a slip coating layer or an AS (anti-static) coating layer
Data Source
AI summary
A display device includes a display panel including a side that displays an image, and an another side opposite to the side, a bottom layer disposed on the another side of the display panel, wherein the bottom layer includes a side facing toward the display panel, and an another side opposite to the side of the bottom layer, and a foldable member disposed on the another side of the bottom layer. The bottom layer includes a non-attached portion not attached to the foldable member; and a protective coating layer disposed on the another side of the bottom layer and overlapping the non-attached portion.