Touch Display Adhesive Assemblies for Light Leakage Prevention
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Solution Overview
Problem
Conventional touch display devices suffer from edge light leakage and structural instability due to gaps between adhesive elements and non-planar bonding surfaces, leading to potential breakage during operation.
Innovation Solution
A touch display device design featuring a touch panel and display panel supported by a supporting element, with a first adhesive assembly and a second adhesive assembly, where the second adhesive elements overlap to fill gaps and ensure a planar bonding surface, preventing light leakage and structural issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If bezel tape or ABT tape is used to bond the touch panel and display panel, then the bonding strength is improved, but gaps are formed between the panels causing light leakage
Solution Approach 1:
The bonding structure is divided into two separate adhesive assemblies: a first adhesive assembly that bonds the touch panel to the display panel, and a second adhesive assembly that bonds the display panel to the supporting element. This segmentation allows each adhesive assembly to perform its specific function independently, with the first adhesive assembly ensuring intimate contact between panels to prevent light leakage, and the second adhesive assembly providing structural support.
2Ease of manufacture
If frame glue is applied to a non-planar surface caused by overlapping tapes, then the bonding process is simplified, but the touch panel becomes easily broken during operation
Solution Approach 1:
The first adhesive assembly is applied first to create a planar bonding surface between the touch panel and display panel. Only after this planar surface is established is the second adhesive assembly applied to bond the display panel to the supporting element. This preliminary action ensures that the bonding surface is planar before subsequent bonding, preventing touch panel breakage while maintaining manufacturing simplicity.
3Area of stationary object
If adhesive elements are placed adjacent to each other without gaps, then the bonding coverage is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The bonding system is segmented into multiple adhesive assemblies with distinct functions. The first adhesive assembly uses elements placed adjacent to each other to maximize bonding coverage between the touch panel and display panel. The second adhesive assembly is positioned separately to bond the display panel to the supporting element. This functional segmentation allows each assembly to optimize its element placement for its specific purpose without requiring ultra-high precision across the entire bonding system.
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 design effectively eliminates edge light leakage and prevents touch panel breakage by ensuring a secure, planar bonding surface and blocking light emission through strategic adhesive placement.
Implementation Method 1
a first adhesive assembly disposed between the touch panel and the display panel, and including a first adhesive element and a second adhesive element
Data Source
AI summary
A touch display device is disclosed. The touch display device includes a touch-display module, a supporting element, a first adhesive assembly and a second adhesive assembly. The touch-display module includes a touch panel and a display panel. The supporting element supports the touch panel and the display panel. The first adhesive assembly is disposed between the touch panel and the display panel, and includes a first adhesive element and a second adhesive element. The first adhesive element and the second adhesive element are located adjacent to each other and have a gap therebetween. The second adhesive assembly is disposed between the touch panel and the display panel and adhered to the supporting element. The second adhesive assembly includes a third adhesive element and a fourth adhesive element.