Touch Display Frame Fixing Members for Large Panel Stability
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Solution Overview
Problem
Existing touch display devices face challenges in achieving stable assembly and sufficient bearing strength for large-size displays due to the reliance on optically clear adhesive (OCA) for fixing the cover plate to the display panel, which is inadequate for maintaining toughness and stability.
Innovation Solution
A touch display device design featuring a cover plate, touch module, frame, and display module, where the frame with fixing members crosses the peripheral zone of the touch panel to securely attach to the cover plate, utilizing through holes and adhesive layers for enhanced structural integrity, and incorporating flexible sensing electrode layers and wiring layers for improved assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If only OCA is used to fix the cover plate to the display panel, then the border width is minimized, but the assembly stability and bearing strength are insufficient for large-size displays
Solution Approach 1:
The fixing method is segmented into multiple components: OCA adhesive for the narrow border region and multiple fixing members (screws or clips) distributed across the peripheral zone. This segmentation allows each component to perform its specialized function - OCA for minimal border width and fixing members for structural strength.
Solution Approach 2:
The solution merges two fixing approaches - chemical bonding via OCA adhesive and mechanical bonding via fixing members - into a hybrid assembly system. This combination leverages the advantages of both methods to simultaneously achieve narrow borders and sufficient bearing strength.
2Strength
If the cover plate is made thicker and heavier to maintain toughness for large-size displays, then the bearing strength is improved, but the assembly stability deteriorates due to inadequate fixing
Solution Approach 1:
The frame acts as an intermediary component between the cover plate and display module, providing a structured platform for mounting fixing members. This intermediary structure distributes mechanical loads evenly across the assembly, enhancing overall stability without requiring excessive cover plate thickness.
Solution Approach 2:
The fixing members alter the mechanical parameters of the assembly by introducing multiple attachment points that distribute stress. This changes the load-bearing characteristics from relying solely on adhesive bonding to a distributed mechanical fastening system, improving stability.
3Strength
If fixing members are added to the frame, then the bearing strength is sufficient, but the device complexity increases
Solution Approach 1:
The fixing members serve multiple functions: they provide mechanical attachment strength, distribute structural loads, and maintain the spatial relationship between components. This multi-functionality reduces the need for additional specialized components, managing complexity while achieving strength requirements.
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 provides sufficient bearing strength for large-size touch display devices, ensuring stable assembly and maintaining structural integrity through the use of fixing members and adhesive layers, addressing the limitations of OCA in achieving a narrow border and maintaining toughness.
Implementation Method 1
a plurality of adhesive layers respectively adhered between the fixing members and the cover plate
Data Source
AI summary
A touch display device includes a cover plate, a touch module, a frame, and a display module. The touch module is disposed on the cover plate and defines thereon a sensing zone and a peripheral zone connecting each other. The frame is located at a side of the touch module away from the cover plate and includes a plurality of fixing members and an accommodating trough. The fixing members cross the peripheral zone to be fixed to the cover plate. At least one part of the touch module in the peripheral zone is attached to a side of the frame away from the cover plate. The display module is disposed in the accommodating trough and over the sensing zone.