Touch Control Panel Bridging Wires Low Reflectivity
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Solution Overview
Problem
Touch sensing panels with high reflectivity bridging wires cause light spots on the screen, affecting image quality due to light reflection from external sources.
Innovation Solution
The use of bridging wires with low reflectivity top surfaces, made from materials like gold, copper, nickel, or their alloys, or with anti-reflective layers, to reduce light reflection and improve image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high reflectivity bridging wires are used, then electrical conductivity is improved, but light spots appear on the screen affecting image quality
Solution Approach 1:
The bridging wire is designed with different surface properties at different locations: the side surfaces maintain high reflectivity for electrical conductivity, while the top surface has low reflectivity to reduce light spots. This local differentiation of surface properties resolves the contradiction between conductivity and image quality.
Solution Approach 2:
The bridging wire employs a composite structure with a metal core (for conductivity) and a metal nitride or metal oxide coating layer (for low reflectivity). This composite material approach allows simultaneous achievement of electrical conductivity and reduced light reflection.
2Reliability
If metal material with high reflectivity is used for bridging wires, then electrical performance is improved, but appearance of light spots affects image quality
Solution Approach 1:
The bridging wire is designed with different surface properties at different locations: the side surfaces maintain high reflectivity for electrical conductivity, while the top surface has low reflectivity to reduce light spots. This local differentiation of surface properties resolves the contradiction between conductivity and image quality.
Solution Approach 2:
The bridging wire employs a composite structure with a metal core (for conductivity) and a metal nitride or metal oxide coating layer (for low reflectivity). This composite material approach allows simultaneous achievement of electrical conductivity and reduced light reflection.
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 solution effectively minimizes light spots on the screen by reducing the reflectivity of bridging wires, thereby enhancing the image quality of touch displays.
Implementation Method 1
the bridging wires reflect light from the external world, which may cause appearance of light spots on the screen of the touch sensing panel, affecting image quality
Data Source
Figure 1A
Figure 1B~2
Figure 3
AI summary
A touch sensing panel is provided in the present disclosure. The touch sensing panel comprises a sensing pattern layer and a plurality of bridging wires disposed on the sensing pattern layer, wherein each bridging wire has a top surface with low reflectivity. The sensing pattern layer comprises a plurality of first sensing pads and a plurality of second sensing pads, wherein the plurality of first sensing pads are connected by the bridging wires to form first sensing arrays, the plurality of second sensing pads are connected by connection parts to form second sensing arrays, and the first sensing arrays are insulated from the second sensing arrays. Reflectivity of the top surfaces of the bridging wires is comparatively low and therefore light from external sources is not easily reflected by the bridging wires, thereby reducing the influence of light spots in image quality.