Capacitive Touch Panel Intersection Light Diffusion
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Solution Overview
Problem
Capacitive touch panels in display apparatuses have visible intersections due to height differences between insulators and electrodes, affecting user visibility and image clarity.
Innovation Solution
Incorporating a light diffusing member at the intersection of connecting electrodes, with a haze value between 0.5% to 2.0% to minimize visibility of the intersection while maintaining image clarity, and using a transparent substrate and conductive materials for improved detection sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an insulator is provided at the intersection between the first connecting electrode and the second connecting electrode to electrically isolate them, then electrical isolation is achieved, but the intersection and other portions differ in height causing visibility issues
Solution Approach 1:
A light diffusing member is introduced as an intermediary component at the intersection area. This member diffuses light to mask the height difference between the insulator and surrounding portions, preventing the intersection from being visible to users while maintaining the electrical isolation function of the insulator
2Reliability
If the insulator is formed to cover the first connecting electrode with the second connecting electrode formed on it, then electrical isolation is achieved, but the intersection becomes visible due to height difference
Solution Approach 1:
The height difference that causes visibility issues is converted into a beneficial structure by adding the light diffusing member. The light diffusing member transforms the harmful visual effect of the height difference into a beneficial masking effect, where the same structural feature that caused the problem now serves to hide the problem when combined with the light diffusing property
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 reduces the visibility of height differences at electrode intersections, enhancing user experience by maintaining clear images and realistic touch feedback in capacitive touch panels within display apparatuses.
Implementation Method 1
a light diffusing member disposed at least in an area corresponding to the intersection
Data Source
AI summary
An input device includes a substrate including a first principal surface and a second principal surface opposite the first principal surface; a plurality of first detecting electrodes disposed on the second principal surface of the substrate; a plurality of second detecting electrodes disposed on the second principal surface of the substrate; at least one first connecting electrode disposed on the second principal surface of the substrate, the first connecting electrode being configured to connect adjacent first detecting electrodes to each other; at least one second connecting electrode including an intersection that is spaced from the second principal surface of the substrate and crosses the first connecting electrode, the second connecting electrode being configured to connect adjacent second detecting electrodes to each other; and a light diffusing member disposed at least in an area corresponding to the intersection.