In Cell Touch Panel Uniform Groove Insulating Layer
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Solution Overview
Problem
In Cell touch screen panels face issues with non-uniform via hole distribution leading to non-uniformity in the displayed picture, increasing fabrication costs and reducing the signal-to-noise ratio for touch detection.
Innovation Solution
The implementation of an In Cell touch panel with self capacitance electrodes and wires in different layers, where the insulating layer includes uniform grooves and via holes for electrical connections, ensuring that only corresponding electrodes and wires are connected, and recesses are used for non-connected regions to maintain uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If via holes are non-uniformly distributed to connect self capacitance electrodes with wires, then electrical connection is achieved, but uniformity of the displayed picture deteriorates
Solution Approach 1:
The patent introduces a third dimension by adding an insulating layer between the self capacitance electrodes and wires. This layer contains grooves that guide wire positioning and ensure uniform distribution, transforming a 2D connection problem into a 3D structured solution that maintains both electrical connectivity and display uniformity
Solution Approach 2:
The insulating layer acts as an intermediary element between the self capacitance electrodes and wires. It provides grooves that mediate the connection process, ensuring wires are positioned uniformly while maintaining electrical connection reliability and preventing direct contact that would cause short circuits
2Ease of manufacture
If self capacitance electrodes and wires are arranged in the same layer, then fabrication process is simplified, but signal-to-noise ratio for touch detection deteriorates
Solution Approach 1:
The patent separates self capacitance electrodes and wires into different layers (vertical dimension), creating spatial isolation that reduces electromagnetic interference and improves signal-to-noise ratio, while the insulating layer with grooves maintains fabrication simplicity through structured alignment
3Length of stationary object
If In Cell touch panel structure is used to reduce module thickness, then overall thickness is reduced, but via hole distribution uniformity deteriorates
Solution Approach 1:
The patent adds the insulating layer dimension to the In Cell structure, creating a layered architecture that maintains thin profile while using vertical grooves to ensure uniform via hole distribution, solving the uniformity problem without increasing overall thickness
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 solution addresses the non-uniformity in the displayed picture by ensuring uniform groove distribution in the insulating layer, reducing fabrication complexity and enhancing the signal-to-noise ratio for accurate touch detection.
Implementation Method 1
a finger touch position is detected by virtue of the principle of mutual capacitance or self capacitance
Data Source
AI summary
An In Cell touch panel and a display device are disclosed. The insulating layer comprises at least one groove at overlapping regions between each self capacitance electrode and the wires. Via holes penetrating the insulating layer are arranged in the insulating layer at overlapping regions between corresponding wires and self capacitance electrodes. Recesses not penetrating the insulating layer are arranged in the insulating layer at overlapping regions between wires and self capacitance electrodes apart from the corresponding wires and self capacitance electrodes. Thus, only the corresponding wires and self capacitance electrodes are electrically connected with each other, and the insulating layer is further provided with grooves at overlapping regions between wires and self capacitance electrodes which are not electrically connected. Grooves are distributed uniformly in the insulating layer and the problem of non-uniform displayed picture due to non-uniform distribution of via holes in the insulating layer is solved.