Touch Screen Connecting Patterns for Flat Panel Displays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Touch screen panels with capacitive sensing patterns face issues of high surface resistance and electrostatic vulnerability due to the use of transparent conductive materials, leading to reduced sensitivity and increased parasitic capacitance, as well as visibility problems caused by overlapping connection patterns with pixels.
Innovation Solution
The solution involves forming connecting patterns of low-resistance metal on the same layer as the sensing cells on the edge of the touch screen panel, arranging them not to cross each other, and positioning them between pixels to prevent overlap, thereby reducing electrostatic vulnerability and improving visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If transparent conductive material (ITO) is used for sensing patterns to maintain transparency, then visibility is improved, but surface resistance increases and sensitivity deteriorates
Solution Approach 1:
The patent uses a composite structure combining transparent conductive material (ITO) for sensing patterns with low-resistance metal material for connecting patterns. This composite approach allows the sensing patterns to maintain transparency while the metal connecting patterns provide low resistance pathways, resolving the contradiction between visibility and sensitivity.
2Reliability
If wide connection parts are used to reduce surface resistance of sensing patterns, then electrical conductivity is improved, but overlapping area increases and parasitic capacitance increases
Solution Approach 1:
The patent applies different material properties to different regions: transparent conductive material (ITO) is used for sensing patterns where transparency is needed, while low-resistance metal material is used for connecting patterns where conductivity is prioritized. This local differentiation allows wide connection parts to achieve low resistance without the same transparency requirements, managing the trade-off between conductivity and parasitic capacitance.
3Illumination intensity
If connection patterns are made of transparent conductive material to maintain visibility, then transparency is improved, but resistance increases and electrostatic vulnerability increases
Solution Approach 1:
The patent employs a composite material strategy where transparent conductive material (ITO) is used for sensing patterns to maintain visibility, while low-resistance metal material is used for connecting patterns to reduce electrostatic vulnerability and resistance. This material differentiation resolves the contradiction between transparency and electrostatic protection.
4Device complexity
If first and second sensing patterns are disposed on different layers to simplify structure, then manufacturing is simplified, but overlapping area increases and parasitic capacitance increases
Solution Approach 1:
The patent positions sensing patterns and connecting patterns on the same layer (two-dimensional arrangement) rather than stacking them on different layers (three-dimensional arrangement). This dimensional change allows the patterns to be arranged side-by-side, reducing overlapping area and parasitic capacitance while maintaining structural simplicity through planar integration.
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 configuration reduces electrostatic discharge risks and enhances visibility by minimizing the impact of connecting patterns on pixel light emission, improving sensitivity and user experience.
Implementation Method 1
when the person's hand or the object contacts the touch screen panel in the capacitive type, the conductive sensing pattern senses the change in capacitance by other adjacent sensing patterns or ground electrodes, etc., thereby converting the contacting position into the electrical signals
Implementation Method 2
making the connecting patterns, which connect adjacent first sensing cells and adjacent second sensing cells in first sensing cell and second sensing cells formed on the same level of the lower surface of the upper substrate of the flat panel display, of the same material as metal patterns formed around the edge of the touch screen panel
Data Source
AI summary
A flat panel display integrated with a touch screen panel. The connecting patterns, which connect adjacent first sensing cells and adjacent second sensing cells are formed on the same level of the lower surface of the upper substrate of the flat panel display of the same material as metal patterns formed around the edge of the touch screen panel, and by arranging the connecting patterns not to cross each other. The flat panel display panel can also be integrated with a touch screen having improved visibility by forming the touch screen panel on the upper substrate of the flat panel display such that connecting patterns are formed in the regions between the pixels.