Tiled Display Side Sealing Structure for Hidden Seams and ESD Protection
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Solution Overview
Problem
Display devices and tiled display devices face issues with static electricity, moisture penetration, and visible seams between adjacent display modules, which can affect their performance and lifespan.
Innovation Solution
A display device and tiled display device design that includes a first substrate with a display area and non-display area, featuring a side link line connected by a side coating layer and a side protective layer, which is covered by a side sealing layer, to prevent static electricity and moisture ingress, and absorb light to hide seams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If display modules are arranged in a grid type to implement a large screen, then the display area is increased, but static electricity and moisture can penetrate into the sides of the display modules
Solution Approach 1:
The side protective structure is divided into multiple functional layers: side coating layer, side protective layer, and side sealing layer. Each layer performs a specific function (light absorption, static electricity dissipation, moisture sealing) to comprehensively protect the display module sides while maintaining the grid arrangement for large screen display.
Solution Approach 2:
The side protective layer acts as an intermediary between the external environment and the display module. It includes a light absorbing material layer that absorbs incident light, a protective layer that dissipates static electricity, and a sealing layer that prevents moisture penetration, thereby mediating the harmful effects on the display module.
2Ease of manufacture
If gaps exist between adjacent display modules, then manufacturing and assembly are simplified, but light incident into gaps creates visible seams
Solution Approach 1:
The side protective layer includes a light absorbing material layer (black color) that absorbs incident light from gaps between display modules. This prevents light reflection that would create visible seams, while maintaining the gaps for easy manufacturing and assembly.
3Device complexity
If the sides of display modules are left exposed, then manufacturing complexity is reduced, but static electricity can enter and damage the display modules
Solution Approach 1:
The protective structure is segmented into functional layers, with the side protective layer containing conductive particles and conductive polymer to dissipate static electricity. This layered approach protects against static electricity damage while maintaining relatively simple manufacturing processes.
4Reliability
If protective layers are added to cover the sides of display modules, then protection against static electricity and moisture is improved, but device complexity increases
Solution Approach 1:
The side protective layer is designed as a multi-functional structure that simultaneously provides light absorption, static electricity dissipation, and moisture sealing. This universal design protects against multiple harmful factors while adding minimal structural complexity compared to separate protective structures for each function.
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
Prevents static electricity and moisture from entering the display modules, improving their lifespan and ensuring seamless integration of adjacent modules.
Implementation Method 1
absorb light incident into the gaps between neighboring display modules
Implementation Method 2
prevent static electricity from entering the sides of the display module
Implementation Method 3
prevent moisture penetration to the sides of the display module
Data Source
AI summary
A display device and a tiled display device each includes: a first substrate including a display area and a non-display area surrounding the display area; a light emitting device in the display area on the first substrate; a first pad portion in the non-display area on a top surface of the first substrate and disposed on one edge of the first substrate; a second substrate under a bottom surface of the first substrate; a second pad portion in the non-display area on a bottom surface of the second substrate and on one edge of the second substrate; a side link line electrically connecting the first pad portion and the second pad portion; a side coating layer covering the side link line; a side protective layer covering at least a portion of the side coating layer; and a side sealing layer covering at least a portion of the side protective layer.