Dual Adhesive Layer for LCD Rework and Assembly
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Solution Overview
Problem
The existing LCD device assembly methods require significant material and labor to fix the display module to the backlight module, and the rework process is time-consuming and prone to damaging the thin glass, especially when replacing the upper polarizer, as it necessitates separating the modules and reassembling them.
Innovation Solution
A dual adhesive layer module comprising a first adhesive film and a second adhesive film is used to fix the display module to the backlight module, allowing for rework without disassembling the device, reducing the risk of damage and simplifying the reapplication of the upper polarizer by exposing the edge of the display panel for easier access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the display module is fixed to the backlight module using screws and front frame, then the structural strength is improved, but the rework complexity and time consumption increase significantly
Solution Approach 1:
The adhesive layer is divided into two distinct films: a first adhesive film that adheres to the backlight module and can be selectively peeled, and a second adhesive film that adheres to the display module. This segmentation allows the display module to be firmly fixed during assembly while enabling easy separation and rework by simply peeling the first adhesive film, thus resolving the contradiction between strong fixation and ease of repair.
2Ease of repair
If the display module is separated from the backlight module for rework, then the upper polarizer can be replaced, but the risk of damaging the lower polarizer and increasing rework time increases
Solution Approach 1:
The adhesive layer is segmented into a first adhesive film (attached to backlight module) and a second adhesive film (attached to display module). For rework, only the first adhesive film needs to be peeled, allowing the display module to remain in position while enabling access to the upper polarizer. This eliminates the need to separate the entire display module from the backlight module, thus reducing rework time and protecting the lower polarizer from damage.
Solution Approach 2:
The first adhesive film is designed to be selectively peelable from the second adhesive film, allowing the display module to be extracted from the backlight module only when necessary for rework. This extraction mechanism enables upper polarizer replacement without requiring complete module separation, thereby reducing the risk of damaging the lower polarizer and minimizing rework time.
3Ease of manufacture
If a single adhesive layer is used to fix the display module, then the assembly process is simple, but the rework process becomes complex and time-consuming
Solution Approach 1:
The adhesive layer is segmented into two films with different functions: the first adhesive film provides the primary bonding to the backlight module and can be selectively peeled for rework, while the second adhesive film maintains the display module's position during assembly. This segmentation allows the assembly process to remain simple (just peel and stick) while making rework easy (only peel the first film), thus resolving the contradiction between assembly simplicity and rework ease.
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
This solution decreases the time and labor required for assembly and rework, minimizes the risk of damaging the display module, and allows for direct rework of the upper polarizer without separating the modules, thereby reducing costs and operational complexity.
Implementation Method 1
The adhesive layer has a first adhesive film and a second adhesive film. The display module is disposed on the inner fringe of the backlight module by using the adhesive layer
Data Source
AI summary
An LCD device having a backlight module, a display module and an adhesive layer is provided. The backlight module has an inner fringe for holding the display module. The display module sequentially includes a lower polarizer, a display panel and an upper polarizer. The edge of the upper surface of the display panel is exposed because the area of the upper polarizer is smaller than the area of the display panel. The adhesive layer has a first adhesive film and a second adhesive film. The display module is disposed on the inner fringe of the backlight module by using the adhesive layer wherein the first adhesive film is on the side wall of the backlight module and portion of the edge of the upper surface of the display panel, the second adhesive film is on the portion of the first adhesive film and the exposed edge of upper surface of the display panel.