Touch Panel Discharge Pattern for Charge Concentration Damage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Touch sensors in touch panels and devices can be damaged due to the concentration of charges at specific areas where an electric field is formed during mutual capacitance sensing, leading to increased repulsive forces and potential defects in touch sensing.
Innovation Solution
Incorporating a discharge pattern on a layer different from the touch sensors, which overlaps the area between the first and second touch sensors and has one end connected to either sensor, provides an electrostatic discharge path to prevent damage from charge concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If touch sensors are disposed adjacent to each other for mutual capacitance sensing, then touch sensing capability is improved, but charge concentration occurs at the electric field formation area causing sensor damage
Solution Approach 1:
A discharge pattern is introduced as an intermediary element between adjacent touch sensors. This discharge pattern provides a dedicated path for charges to dissipate, preventing charge accumulation at the electric field formation area between touch sensors. The discharge pattern acts as a mediator that resolves the harmful interaction between adjacent sensors while maintaining their sensing functionality.
Solution Approach 2:
The invention converts the harmful charge concentration phenomenon into a beneficial discharge path. By intentionally providing a controlled discharge path through the discharge pattern, the charges that would otherwise damage the touch sensors are redirected to a safe dissipation route. This transforms the harmful electrostatic accumulation into a controlled discharge mechanism that protects the sensor array.
2Reliability
If discharge patterns are added to prevent charge concentration, then sensor reliability is improved, but device structure becomes more complex
Solution Approach 1:
The discharge pattern is designed to serve multiple functions within the touch panel structure. It not only provides a discharge path for charge dissipation but also integrates with the existing layer structure of the touch panel. The discharge pattern can be formed using the same or similar materials and processes as other conductive elements in the panel, making it a multi-functional component that adds protection without significantly increasing overall device complexity.
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 discharge pattern effectively prevents touch sensor damage by providing a path for static electricity discharge, reducing the occurrence of defects in touch sensors and maintaining touch sensing functionality.
Implementation Method 1
one or more discharge patterns disposed on a layer different from the first touch sensor, configured to overlap an area between the first touch sensor and the second touch sensor, and having one end connected to the first touch sensor or the second touch sensor
Data Source
AI summary
A display device includes a light-emitting device, an encapsulation layer disposed on the light-emitting device, an insulating layer on the encapsulation layer; a plurality of first touch sensors on an upper surface of the insulating layer, and arranged in a first direction; a plurality of second touch sensors on the upper surface of the insulating layer, and arranged in a second direction intersecting the first direction, and a discharge pattern disposed between the encapsulation layer and the insulating layer, and overlapping an area between a first touch sensor of the plurality of first touch sensors and a second touch sensor of the plurality of second touch sensors, the plurality of first touch sensors and the plurality of second touch sensors are a mesh type and include a protruding outer portion.