Elastic Member Thickness Variation for Display Panel Flatness
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Solution Overview
Problem
Flexible display devices face unevenness issues at folding portions due to manufacturing errors and assembly tolerances, leading to deformation and visual imperfections.
Innovation Solution
A flexible display device with a multi-joint mechanism and an elastic member coated using slit coating, where the elastic member includes a first and second coating layer with varying viscosities, and materials like silicon, rubber, or plastic, to ensure flatness and impact resistance, with a PSA sheet and adhesive for enhanced attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a multi-joint mechanism is used to provide foldability, then the display device can be bent freely, but unevenness is generated on the surface due to dimensional error and assembly tolerance
Solution Approach 1:
The patent applies local quality by varying the thickness of the elastic member at different positions. The elastic member has a first thickness at a first position and a second thickness at a second position, allowing compensation for local unevenness caused by the multi-joint mechanism while maintaining overall foldability.
Solution Approach 2:
The patent changes the physical parameter of the elastic member's thickness to compensate for surface unevenness. By adjusting the thickness parameter spatially, the patent achieves both foldability and improved surface flatness at the attachment surface.
2Manufacturing precision
If the elastic member thickness is varied to compensate for unevenness, then surface flatness is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent introduces an elastic member as an intermediary element between the multi-joint mechanism and the display panel. This intermediary component absorbs the complexity of varying thickness requirements, allowing the underlying multi-joint mechanism to remain simple while achieving the desired surface flatness.
3Manufacturing precision
If a coating layer is applied to planarize the surface, then unevenness is reduced, but the device structure becomes more complex
Solution Approach 1:
The patent merges the planarization function with the elastic member that already provides cushioning and flexibility. By combining these functions into a single component with spatially varying thickness, the patent avoids adding separate coating layers or planarization structures, thereby reducing overall device complexity.
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 planarizes the attachment surface, reduces deformation, and enhances impact resistance by varying the thickness of the coating layer based on position, improving the overall uniformity and durability of the display device.
Implementation Method 1
an elastic member disposed between the multi-joint mechanism and the display panel
Implementation Method 2
an elastic member coated using slit coating
Data Source
AI summary
A display device includes: a display panel; a multi-joint mechanism configured to provide foldability and support to the display panel; and an elastic member disposed between the multi-joint mechanism and the display panel, wherein a distance between an upper surface of the multi-joint mechanism and a lower surface of the display panel varies depending on the position of the display panel.