Display Lamination Gas Absorption Control
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Solution Overview
Problem
Existing display device manufacturing processes struggle with reducing bubbles in the adhesive layer, which can affect the quality and reliability of the display device.
Innovation Solution
A manufacturing apparatus and method that includes a gas absorption amount measuring unit to assess the gas absorption of the adhesive layer, a lamination unit for applying the adhesive layer and cover window on the display panel, and a controller to ensure lamination only when the gas absorption meets a specific condition, thereby minimizing bubbles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the adhesive layer is laminated without measuring gas absorption, then the manufacturing process is simpler and faster, but bubbles remain in the adhesive layer affecting quality
Solution Approach 1:
The gas absorption amount of the adhesive layer is measured in advance before the lamination process. This preliminary measurement allows the controller to determine whether the adhesive layer is suitable for lamination, preventing bubble formation before it occurs and ensuring high-quality bonding without requiring complex post-processing.
Solution Approach 2:
The gas absorption amount measuring unit provides feedback information to the controller, which then decides whether to proceed with the lamination process. This feedback mechanism ensures that lamination only occurs when the adhesive layer has appropriate gas absorption properties, thereby preventing bubble formation while maintaining process simplicity.
2Manufacturing precision
If gas absorption measurement is performed, then bubble formation is reduced, but measurement time and equipment complexity increase
Solution Approach 1:
The system measures the gas absorption amount of the adhesive layer as a key parameter before lamination. By controlling this parameter to be within a specific range (0.03 mg/g to 0.08 mg/g), the system ensures high bonding quality without requiring excessive measurement time or complex equipment, as the measurement is performed under standardized conditions.
3Productivity
If lamination is performed on adhesive layer with high gas absorption, then bonding process can proceed, but bubbles are generated in the adhesive layer
Solution Approach 1:
The system takes preliminary anti-action by measuring the gas absorption amount before lamination and preventing the process from proceeding if the gas absorption is outside the acceptable range (0.03 mg/g to 0.08 mg/g). This prevents bubble formation before it can occur, maintaining high productivity while eliminating harmful bubbles in the adhesive layer.
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 the number of bubbles in the adhesive layer, enhancing the quality and reliability of the display device by ensuring proper bonding and minimizing defects.
Implementation Method 1
a gas absorption amount measuring unit that measures an amount of gas absorption of the adhesive layer at a first pressure and a first temperature
Implementation Method 2
a lamination unit that laminates the adhesive layer and the cover window on the display panel
Implementation Method 3
an autoclave unit that performs an autoclave process on the display device at a second pressure and a second temperature
Implementation Method 4
an autoclave unit that performs an autoclave process on the display device at a second pressure and a second temperature
Implementation Method 5
an ultraviolet ray treatment unit that treats the display device with ultraviolet rays
Data Source
AI summary
An apparatus for manufacturing a display device is provided, the display device including a display panel, an adhesive layer, and a cover window, wherein the apparatus includes a gas absorption amount measuring unit that measures an amount of gas absorption of the adhesive layer at a first pressure and a first temperature, a lamination unit that laminates the adhesive layer and the cover window on the display panel, and a controller that controls the lamination unit based on information measured by the gas absorption amount measurement unit, wherein the controller controls the lamination unit to perform a lamination process only when the amount of gas absorption of the adhesive layer measured by the gas absorption amount measurement unit satisfies a first condition.