Curved Display Module Adhesive Lamination Without Bubbles
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Solution Overview
Problem
Existing display module manufacturing methods face challenges in effectively bonding curved surfaces of display panels and windows due to uneven adhesive distribution and potential bubble formation, leading to durability issues.
Innovation Solution
A display module design utilizing an adhesive that softens upon application and cures under light, ensuring even coverage and strong bonding between a display panel and window, including bent parts, thereby preventing bubble formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a display panel and window with curved surfaces are bonded together during the lamination process, then the display module achieves a curved display surface, but the cured surfaces of the display panel and window may not be completely bonded or may be damaged due to relatively low durability
Solution Approach 1:
The adhesive's viscosity is changed through temperature control during the lamination process. The adhesive is maintained at a high temperature to keep it in a low-viscosity state during application, then cooled to achieve proper bonding strength, resolving the contradiction between achieving curved surface bonding and ensuring bonding durability
Solution Approach 2:
The adhesive is pre-heated to a high temperature before the lamination process to ensure it is in a low-viscosity state when applied to the curved surfaces. This preliminary temperature preparation allows the adhesive to flow and fill gaps in the curved geometry before curing, ensuring complete bonding
2Strength
If adhesive is applied to curved surfaces during lamination, then bonding between display panel and window is achieved, but uneven adhesive distribution and bubble formation occur leading to durability issues
Solution Approach 1:
The adhesive viscosity is dynamically controlled through temperature parameters. At application temperature, the adhesive has low viscosity for uniform distribution on curved surfaces, then undergoes phase change or viscosity increase upon cooling or curing to achieve strong bonding without bubbles
Solution Approach 2:
The patent replaces mechanical mixing or spreading methods with a temperature-controlled viscosity adjustment system. The adhesive's flow properties are controlled thermally rather than mechanically, allowing uniform distribution on complex curved geometries and preventing bubble formation during the bonding process
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 enhances bonding reliability and durability by ensuring a high-strength attachment between the display panel and window, particularly in curved areas, while preventing bubbles.
Implementation Method 1
The adhesive comprises a first adhesive material having a first degree of adhesiveness that is dependent upon exposure to a first light
Data Source
AI summary
Provided is a display module. The display module includes a display unit comprising a flat part and a bent part that extends from the flat part, a window disposed on the display unit, and an adhesive layer disposed between the display unit and the window. The adhesive layer comprises a first adhesive material with a first degree of adhesiveness that is dependent upon exposure to a first light.