Touch Panel Insulating Pad Shape for Crack Resistance
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Solution Overview
Problem
Touch panels face issues with insulating pads cracking due to external forces during cleaning processes, as the force direction is perpendicular to the edge of rectangular pads, leading to ineffective force dispersion and reduced yield.
Innovation Solution
Designing insulating pads with non-rectangular shapes, such as hexagonal or rhombus, and incorporating extension portions that protrude from the center, allowing external forces to be dispersed through multiple edges, thereby preventing cracks and enhancing anti-impacting ability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If rectangular insulating pads are used, then the manufacturing process is simple, but the pads are prone to cracking under external force during cleaning processes
Solution Approach 1:
The patent applies asymmetry by changing the insulating pad shape from a symmetric rectangle to a non-rectangular shape where the edge is non-perpendicular to the direction of external force. This asymmetric geometry allows the pad to better distribute cleaning forces and resist cracking while maintaining ease of manufacture through standard photolithography processes.
2Reliability
If non-rectangular insulating pads with non-perpendicular edges are used, then the anti-impacting ability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent employs parameter changes by modifying the geometric parameters of the insulating pad, specifically the edge angles and shape dimensions. By optimizing these parameters so that edges are non-perpendicular to the external force direction, the pad achieves superior crack resistance while remaining compatible with existing manufacturing tolerances.
Data Source
AI summary
The present invention provides a touch panel. The touch panel includes first sensing lines extending in a first direction, second sensing lines extending in a second direction and intersecting with the first sensing lines, an insulating pad disposed at each intersection between the first sensing lines and the second sensing lines for isolating the first sensing lines and the second sensing lines. A direction of an external force exerted in the insulating pad is non-perpendicular to the edge of said insulating pad on the same horizontal plane. The present invention also provides a manufacturing method of the touch panel. The design of the insulating pad can disperse the external impact force caused by air knife, washing and so on, and preventing the cut-off of the insulating pad, thereby improving the yield of the touch panel.