Mesh Touch Electrodes With Auxiliary TCO Parts for Noise Shielding
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Solution Overview
Problem
Current display devices face challenges in achieving high sensitivity for input sensing due to noise interference and the complexity of integrating input sensing units directly on the display panel.
Innovation Solution
The integration of an input sensing unit on the display panel, comprising a mesh-shaped first and second electrode with auxiliary sensor parts and connection parts, including transparent conductive oxide, which overlaps a noise shield electrode to enhance sensitivity and noise shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an input sensing unit is integrated directly on the display panel, then sensitivity is improved, but noise interference increases
Solution Approach 1:
The electrode is divided into sensor parts and connection parts, with the sensor parts having a mesh shape that overlaps emission areas and the connection parts located in non-emission areas. This segmentation allows the sensing function to be separated from the noise-generating connection structures, improving sensitivity while reducing noise interference.
Solution Approach 2:
Different portions of the electrode structure are assigned different functions and properties: mesh-shaped sensor parts in emission areas for high sensitivity detection, and connection parts in non-emission areas for electrical connectivity. This local differentiation optimizes both sensing performance and noise reduction.
2Measurement precision
If mesh-shaped sensor parts are used in emission areas, then detection precision is improved, but device complexity increases
Solution Approach 1:
The input sensing unit is merged with the display panel structure, sharing the same substrate and utilizing the same manufacturing processes. The electrode layers are integrated into the display device architecture, reducing overall device complexity while maintaining high detection precision through mesh-shaped sensor parts.
Solution Approach 2:
The electrode structure serves multiple functions: it acts as both a display electrode for driving the display and a sensing electrode for detecting touch inputs. The mesh-shaped sensor parts provide both electrical connectivity and mechanical sensing capability, reducing the need for separate components.
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 improves the sensitivity of the input sensing unit by reducing noise interference and allowing for precise detection of external inputs, even fine touch events, while maintaining a thin and efficient display device structure.
Implementation Method 1
first auxiliary sensor parts connected to the first sensor parts and including a transparent conductive oxide
Implementation Method 2
transparent conductive oxide
Implementation Method 3
first electrode includes first sensor parts having a metal and a mesh shape
Implementation Method 4
The input sensing unit includes at least one insulation layer, a first electrode, and a second electrode
Data Source
AI summary
Provided is a display device including a display panel and an input sensing unit. The input sensing unit includes at least one insulation layer, an electrode, and an auxiliary electrode. The electrode includes sensor parts including a metal and having a mesh shape and connection parts connecting adjacent sensor parts of the sensor parts to each other. The auxiliary electrode overlaps the sensor parts, is connected to the sensor parts, and includes transparent conductive oxide.