Single-Substrate Touch Panel Electrode Design for Transmittance
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Solution Overview
Problem
Current touch panels with two-layered capacitive technology require multiple base materials and optically clear adhesives, leading to complex manufacturing processes and reduced transmittance.
Innovation Solution
A touch panel design where both electrodes are disposed on opposite surfaces of a single base material, simplifying the stack structure and improving transmittance, with a method involving the formation of electrodes on both surfaces of the base material for efficient manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple base materials and optically clear adhesives are stacked to form electrodes in a two-layered capacitive touch panel, then the electrode structure is formed, but the manufacturing process becomes complicated and transmittance is reduced
Solution Approach 1:
The patent merges two separate base materials into a single base material, with first and second electrodes formed on opposite surfaces of the same substrate. This consolidation eliminates the need for multiple optically clear adhesives and simplifies the stacking process, directly resolving the contradiction between forming a complete electrode structure and maintaining manufacturing simplicity
Solution Approach 2:
The electrode structure is segmented into two independent electrodes (first electrode and second electrode) formed on opposite surfaces of the base material. This segmentation allows each electrode to be manufactured and patterned independently, simplifying the overall manufacturing process while maintaining the functional integrity of the capacitive touch panel
2Reliability
If multiple base materials and optically clear adhesives are stacked to form electrodes in a two-layered capacitive touch panel, then the electrode structure is formed, but transmittance is reduced
Solution Approach 1:
By merging multiple base materials and adhesives into a single base material structure, the patent reduces the total number of optical interfaces and material layers that light must pass through. This directly improves transmittance while maintaining the necessary electrode structure for capacitive sensing
3Ease of manufacture
If both surfaces of the base material are exposed and printed at the same time to form electrodes, then manufacturing is simplified, but manufacturing precision must be maintained
Solution Approach 1:
The patent employs preliminary masking and alignment preparations before the printing process, ensuring that both surfaces can be exposed and printed simultaneously with high precision. The base material is pre-positioned and aligned in the manufacturing apparatus, allowing concurrent processing while maintaining the required electrode pattern accuracy
Data Source
AI summary
Provided is a touch panel. The touch panel includes a substrate and an electrode member disposed on the substrate. The electrode member includes a base material for electrode having first and second surfaces opposite to each other, a first electrode disposed on the first surface, and a second electrode disposed on the second surface.