Bending Adhesive Layer Air Flow Passage Bubble Discharge
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Solution Overview
Problem
The manufacturing process of display devices often results in bubbles forming between the backlight module and the display module, leading to a low yield due to easy separation and increased defective rates.
Innovation Solution
A display device design incorporating a bending adhesive layer with an air flow passage between the display module and the bending adhesive layer, allowing bubbles to be discharged, thereby maintaining contact between the backlight and display modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the backlight module and display module are connected through a bending adhesive layer, then the modules are bonded together, but bubbles may form in the manufacturing process leading to separation and low yield
Solution Approach 1:
The bending adhesive layer is designed with a porous structure containing multiple air flow passages that allow bubbles to escape during the bonding process. This porous design enables the adhesive layer to maintain bonding strength while providing bubble discharge pathways, thereby preventing separation and improving yield rate.
Solution Approach 2:
The bending adhesive layer acts as an intermediary between the backlight module and display module, not only providing bonding function but also serving as a bubble discharge channel through its porous structure. This mediator role allows bubbles to be expelled during bonding, preventing defects and improving production yield.
2Device complexity
If a conventional adhesive layer is used to bond the modules, then the structure is simple, but bubbles cannot be discharged leading to separation and increased defective rates
Solution Approach 1:
The bending adhesive layer incorporates a porous structure with air flow passages formed within the adhesive material itself. This design adds minimal structural complexity while enabling bubble discharge functionality, thereby reducing defective rates without significantly complicating the overall device structure.
3Strength
If the adhesive layer is made thicker to ensure bonding, then bonding strength increases, but bubble discharge becomes more difficult reducing yield
Solution Approach 1:
The bending adhesive layer employs a porous structure with air flow passages that extend through the adhesive layer thickness. This allows bubbles to be discharged even from thicker adhesive layers, maintaining both bonding strength and high yield by providing continuous bubble escape pathways throughout the adhesive structure.
Solution Approach 2:
The air flow passages are arranged in multiple dimensions within the adhesive layer, creating a three-dimensional bubble discharge network. This multi-dimensional approach ensures that bubbles can escape regardless of their position within the adhesive layer thickness, maintaining effective bubble discharge even when the adhesive layer is made thicker for enhanced bonding.
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 air flow passage effectively discharges bubbles, preventing separation and increasing the contact area between modules, thus improving the yield and reducing defective rates of display devices.
Implementation Method 1
a pressure zone exists between the backlight module and the bending adhesive layer; when a bubble exists in the pressure zone, the bubble is discharged through the air flow passage
Data Source
AI summary
Provided is a display device. The display device includes a bending adhesive layer, a backlight module and a display module; the backlight module and the display module are connected through the bending adhesive layer; an air flow passage is disposed between the display module and the bending adhesive layer, and a pressure zone exists between the backlight module and the bending adhesive layer; the air flow passage is configured to discharge a bubble existed in the pressure zone.