Touch Display Device With Segmented Adhesive Bonding
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Solution Overview
Problem
Conventional industrial touch display devices have display and touch modules that are difficult to disassemble, leading to increased maintenance costs and environmental pollution due to the need to replace the entire device when either component is damaged.
Innovation Solution
A touch display device design featuring a display module, a touch module, and a light-transmitting substrate, where the touch module is fixed to the display surface with adhesives of varying strengths, allowing for easy disassembly and maintenance by allowing the adhesive strength of the adhesive to range from 50N/25 mm to 100N/25 mm, while the first and second optical adhesives have strengths of up to 5N/25 mm and 40N/25 mm respectively, facilitating the separation of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the display module and touch module are fixed together with strong adhesive, then the structural stability is improved, but the ease of repair deteriorates
Solution Approach 1:
The patent applies different adhesive strengths at different locations: a strong adhesive (50-100N/25mm) is used at the four corners for structural stability, while a weak adhesive (≤5N/25mm) is used in the central area for easy separation. This local differentiation resolves the contradiction by providing both strong overall bonding and easy repair capability.
Solution Approach 2:
The adhesive layer is segmented into multiple regions with different properties: corner regions with strong adhesive for structural support, and a central region with weak adhesive for easy separation. This segmentation allows the system to simultaneously achieve structural stability and ease of repair.
2Reliability
If the display module and touch module are fixed together permanently, then the reliability is improved, but the ease of operation deteriorates
Solution Approach 1:
The patent uses strong adhesive at the corners to ensure reliable structural bonding, while using weak adhesive in the center to allow easy separation when needed. This local quality differentiation resolves the contradiction between reliability and ease of operation.
3Reliability
If the entire device is replaced when one component is damaged, then the reliability is maintained, but the loss of substance increases
Solution Approach 1:
The patent segments the adhesive bonding into strong corner regions and a weak central region, enabling selective separation of the touch module from the display module. This allows replacement of only the damaged component rather than the entire device, reducing material waste while maintaining reliability through proper reassembly.
Solution Approach 2:
The patent enables recovery and reuse of undamaged components by allowing easy separation through the weak central adhesive. When one module is damaged, the other can be recovered and reused, reducing substance loss compared to replacing the entire device.
4Reliability
If the entire device is replaced when one component is damaged, then the reliability is maintained, but the loss of time increases
Solution Approach 1:
The segmented adhesive design with weak central bonding enables quick separation of modules, allowing maintenance personnel to replace only the damaged component rather than the entire device, significantly reducing maintenance time while maintaining system reliability.
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
Enables convenient maintenance by allowing the display module and touch module to be easily disassembled, reducing the need for full device replacement and thus lowering maintenance costs and environmental impact.
Implementation Method 1
The touch module is fixed to the display surface by an adhesive. The adhesive strength of the adhesive ranges from 50N/25 millimeter (mm) to 100N/25 mm
Implementation Method 2
One side of the light-transmitting substrate is fixed to the display surface by a first optical adhesive. The adhesive strength of the first optical adhesive is smaller than or equal to 5N/25 mm
Implementation Method 3
The other side of the light-transmitting substrate is fixed to the touch module by a second optical adhesive. The adhesive strength of the second optical adhesive ranges from 15N/25 mm to 40N/25 mm
Implementation Method 4
A percentage difference between a refractive index of the touch module and a refractive index of the light-transmitting substrate ranges from 0.1% to 5%
Data Source
AI summary
A touch display device includes a display module, a touch module and a light-transmitting substrate. The display module has a display surface and a bottom surface opposite to the display surface. The touch module is fixed to the display surface by an adhesive. The adhesive, the touch module and the display surface jointly define an accommodating space between the display module and the touch module. The light-transmitting substrate is disposed in the accommodating space. One side of the light-transmitting substrate is fixed to the display surface by a first optical adhesive, and the other side of the light-transmitting substrate is fixed to the touch module by a second optical adhesive. An adhesive strength of the adhesive is higher than an adhesive strength of the first optical adhesive, and the adhesive strength of the adhesive is higher than an adhesive strength of the second optical adhesive.