Touch Sensor Integrated Display Electrostatic Discharge Protection
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Solution Overview
Problem
Conventional touch sensor integrated type display devices face issues with increased thickness and sensitivity to static electricity due to the presence of driving and sensing electrode layers, which can lead to damage from external static electricity.
Innovation Solution
The solution involves dividing common electrodes into groups to serve as both touch driving and sensing electrodes and grounding them through an electrostatic charging circuit, utilizing electrostatic discharging circuits to protect against static electricity by connecting these electrodes to a ground wire only when high voltages are detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If common electrodes are divided into groups to serve as touch driving and sensing electrodes, then the device achieves touch sensor functionality with reduced thickness, but the electrodes become more sensitive to static electricity from outside
Solution Approach 1:
The common electrodes are divided into multiple groups (first common electrodes and second common electrodes) that are spatially separated and functionally differentiated. This segmentation reduces the overall thickness by eliminating the need for separate driving and sensing electrode layers while maintaining touch functionality. The分组 also helps in managing electrostatic sensitivity by distributing charge across multiple electrode groups.
Solution Approach 2:
Electrostatic discharging circuits are introduced as intermediary components between the common electrodes and the external environment. These circuits act as mediators that provide a controlled path for static electricity to dissipate, protecting the electrodes from direct exposure to external static charges while maintaining the thin structure achieved through electrode grouping.
2Adaptability or versatility
If common electrodes are divided into groups to serve as touch driving and sensing electrodes, then touch functionality is achieved, but the device becomes more susceptible to damage from external static electricity
Solution Approach 1:
By segmenting the common electrodes into distinct groups (first and second common electrodes) with different functions (driving and sensing), the system achieves versatile touch functionality. The segmentation also inherently improves reliability by distributing the electrostatic load across multiple electrode groups, preventing any single electrode from being overwhelmed by external static charges.
Solution Approach 2:
Electrostatic discharging circuits serve as protective intermediaries that safeguard the common electrode groups from external static electricity. These circuits provide a controlled discharge path that protects the touch-sensitive electrodes from damage while preserving the versatility and functionality of the touch sensor system.
3Adaptability or versatility
If complex pixel electrode configurations are used within touch unit patterns, then display functionality is achieved, but the device becomes more sensitive to static electricity
Solution Approach 1:
The pixel electrodes are segmented into subpixel electrodes (first, second, and third subpixel electrodes) that are spatially separated and functionally distinct. This segmentation maintains complex display functionality while reducing static electricity sensitivity by distributing the electrode structure into smaller, more isolated units that are less susceptible to external electrostatic fields.
Solution Approach 2:
Electrostatic discharging circuits are introduced as protective intermediaries between the complex pixel electrode configurations and the external environment. These circuits provide a discharge path that protects the subpixel electrodes from static electricity while preserving the complex display functionality achieved through the pixel electrode arrangements.
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 effectively prevents damage from static electricity by ensuring that the touch driving and sensing electrodes can discharge static electricity, thereby enhancing the durability and reliability of the touch sensor integrated type display device.
Implementation Method 1
a plurality of first electrostatic discharging circuits that are inserted between the first routing wires and a ground wire to discharge static electricity; and a plurality of second electrostatic discharging circuits that are inserted between the plurality of second routing wires and the ground wire to discharge static electricity
Data Source
AI summary
A touch sensor integrated type display device includes gate and data lines that cross over each other to form a plurality of pixel regions; first electrodes arranged in parallel in a first direction; second electrodes arranged in parallel in a second direction; first subpixel electrodes formed within the pixel regions on a different layer from the first electrodes and overlap the first electrodes; a second subpixel electrode formed on the same layer as the first electrodes and overlaps the second electrodes; first routing wires that group the first electrodes into m units; second routing wires that group the second electrodes into n units; first electrostatic discharging circuits that connect the first routing wires to a ground wire; and second electrostatic discharging circuits that connects the second routing wires to the ground wire, wherein the first subpixel electrodes and the second subpixel electrode constitute a unit pixel.