Touch Electrode Structure With Insulating Adhesive Layer
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Solution Overview
Problem
Current touch display devices face challenges in optimizing the spacing and arrangement of sensing electrodes to enhance touch detection accuracy and display performance while maintaining a thin profile.
Innovation Solution
The touch display apparatus incorporates a touch electrode structure with a first and second sensing electrode layer made of transparent conductive materials, insulated by a transparent adhesive layer, and connected to a conductive region, which allows for precise touch detection and improved display performance by reducing the thickness of the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the distance between adjacent sensing electrodes is decreased to enhance touch detection accuracy, then measurement precision is improved, but device thickness increases due to additional insulation layers and structural requirements
Solution Approach 1:
The patent merges the insulation function into the adhesive layer that already bonds the color filter substrate to the sensing electrode, eliminating the need for separate insulation structures. The adhesive layer serves dual purposes: structural bonding and electrical insulation, allowing closer electrode spacing without increasing device thickness.
Solution Approach 2:
The adhesive layer performs multiple functions simultaneously: it acts as a bonding agent between substrates, provides electrical insulation between adjacent sensing electrodes, and maintains structural integrity. This multi-functionality enables reduced electrode spacing while controlling overall device thickness.
2Ease of manufacture
If a transparent adhesive layer is used to insulate sensing electrodes, then ease of manufacture is improved, but device thickness increases
Solution Approach 1:
The patent combines the insulation function with the existing adhesive layer used for substrate bonding. By making the adhesive layer serve dual purposes (bonding and insulation), it eliminates the need for additional insulation layers, thereby simplifying manufacturing while controlling thickness.
3Reliability
If multiple layers are added to insulate and protect sensing electrodes, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent integrates the insulation function into the adhesive layer, reducing the number of discrete layers. This merging approach maintains electrical insulation reliability while simplifying the overall structure and reducing manufacturing complexity.
Data Source
AI summary
A touch display apparatus includes a touch electrode structure and a display assembly. The touch electrode structure senses touch operations on the touch display apparatus. The display assembly displays images of the touch display apparatus. The display assembly includes a polarizer, a first substrate, a color filter, and a second substrate, arranged in that order. The touch electrode structure is sandwiched between the polarizer and the first substrate. The touch electrode structure comprises a first sensing electrode layer. The first sensing electrode is formed on a surface of the first substrate opposite to the color filter.