Touch Sensing Module Antistatic Circuits for Stable Signal Selection
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Solution Overview
Problem
Existing touch sensing modules in display devices are vulnerable to damage from static electricity, which can affect signal selection circuits due to overvoltage and overcurrent, leading to instability in input/output signals.
Innovation Solution
Incorporating antistatic circuits in the signal selection circuits' pad units to stabilize input/output signal levels by applying a constant voltage, thereby protecting these circuits from static electricity-induced damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If touch sensing modules are designed with signal selection circuits to supply driving signals to touch electrodes, then the module can perform touch detection functions, but the circuits become vulnerable to static electricity damage causing overvoltage and overcurrent
Solution Approach 1:
An antistatic circuit is introduced as an intermediary component between the external environment and the signal selection circuits. This antistatic circuit acts as a protective mediator that intercepts static electricity before it can reach and damage the vulnerable signal selection circuits, thereby resolving the contradiction between maintaining circuit functionality and protecting against static damage
Solution Approach 2:
The antistatic circuit is configured to perform preliminary protective action by establishing a constant voltage at the input/output terminals of the signal selection circuits before static electricity can cause damage. This preliminary voltage stabilization prevents overvoltage and overcurrent conditions from developing, thus protecting the circuits in advance
2Reliability
If antistatic circuits are added to protect signal selection circuits from static electricity, then circuit protection is improved, but device complexity increases
Solution Approach 1:
Instead of protecting the entire touch sensing module uniformly, the antistatic circuit is applied locally only at the input/output terminals of the signal selection circuits where static electricity damage is most likely to occur. This localized approach provides targeted protection while minimizing the overall increase in device complexity
Solution Approach 2:
The antistatic circuit uses simple, readily available electronic components that can be easily integrated into the existing circuit design. By using standard electronic parts rather than complex specialized components, the solution maintains simplicity and avoids excessive complexity while still providing effective protection
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 antistatic circuits effectively minimize electrical damage to signal selection circuits and stabilize signal levels, ensuring reliable operation of the touch sensing module.
Implementation Method 1
first through n-th antistatic circuit units applying a constant voltage of a preset size to input/output terminals of the first through n-th signal selection circuit units
Data Source
AI summary
The present disclosure relates to a touch sensing module and a display device including the same. According to an aspect of the present disclosure, a touch sensing module has a touch sensing unit including touch electrodes that are arranged in a touch sensing area and touch lines connected one-to-one to the touch electrodes, and a touch driver detecting touch position coordinates by analyzing touch sensing signals detected from the touch electrodes, wherein the touch sensing unit comprises first through n-th signal selection circuit units supplying touch driving signals to the touch electrodes through the touch lines, respectively, and receiving touch sensing signals from the touch electrodes, and first through n-th antistatic circuit units applying a constant voltage of a preset level to input/output terminals of the first through n-th signal selection circuit units.