Touch Electrode Refractive Index Matching
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Solution Overview
Problem
The manufacturing process of touch display apparatuses often damages the touch electrode, and the refractive index mismatch between the touch electrode and the insulating layer can cause the touch electrode to be visible to the user, affecting display quality.
Innovation Solution
A touch display apparatus design where the insulating pattern is formed after the liquid crystal layer is created, ensuring the refractive index matches that of the touch electrode, and heat treatment is applied to improve the conductive material's crystallization and characteristics, preventing electrode damage and visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the insulating layer is formed before the liquid crystal layer, then the manufacturing process is simpler, but the touch electrode may be damaged during subsequent manufacturing steps
Solution Approach 1:
The insulating layer is formed after the liquid crystal layer instead of before it. This reversal of the conventional sequence prevents the touch electrode from being exposed and damaged during manufacturing steps that would occur if the insulating layer were formed earlier.
2Ease of manufacture
If the refractive index of the insulating layer is different from the touch electrode, then the insulating layer can be formed with standard materials, but the touch electrode becomes visible to the user affecting display quality
Solution Approach 1:
The refractive index of the insulating layer is specifically controlled to match the refractive index of the touch electrode (both having a refractive index of about 1.7). This parameter matching prevents the touch electrode from being visible to the user, ensuring high display quality while maintaining manufacturing feasibility.
3Device complexity
If the insulating pattern is formed before the liquid crystal layer, then the structure is simpler, but the touch electrode is exposed to damage during manufacturing
Solution Approach 1:
The insulating pattern is formed after the liquid crystal layer is deposited. This sequence ensures that the touch electrode remains covered and protected throughout the manufacturing process, preventing exposure to damage while maintaining reasonable structural complexity.
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 approach enhances the resistive and optical characteristics of the touch electrode, preventing damage during manufacturing and ensuring the touch electrode is not visible to the user, thereby improving display quality.
Implementation Method 1
The insulating pattern has a refractive index same as a refractive index of the touch electrode
Implementation Method 2
heat treatment is applied to improve the conductive material's crystallization and characteristics
Implementation Method 3
heat treatment is applied to improve the conductive material's crystallization and characteristics
Data Source
AI summary
A touch display apparatus includes a first substrate, a touch electrode, an insulating pattern, a second substrate and a liquid crystal layer. The touch electrode is disposed on a first surface of the first substrate. The insulating pattern is disposed on the touch electrode. The insulating pattern has a refractive index same as a refractive index of the touch electrode. The second substrate faces a second surface of the first substrate opposite to the first surface of the first substrate. The liquid crystal layer is disposed between the first substrate and the second substrate.