Malleable Metal Sensor Electrodes for Touch Panel Durability
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Solution Overview
Problem
Liquid crystal display panels with touch panel functionality face damage to sensor electrodes due to repetitive pressing, leading to open circuits and signal transmission failures.
Innovation Solution
Incorporating malleable metal sensor electrodes with protrusions and contact assistant members on thin film transistor substrates, which can deform elastically under pressure without cracking, enhancing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional sensor electrodes are used in touch panels, then the touch panel can perform basic sensing function, but the sensor electrode part gets damaged by repetitive pressing leading to open circuits
Solution Approach 1:
The patent changes the material parameter of the sensor electrode from conventional brittle materials to malleable metal materials. This parameter change allows the electrode to deform plastically under pressing force rather than fracturing, thereby maintaining electrical connectivity and improving reliability under repetitive mechanical stress
Solution Approach 2:
The patent employs composite material structures where malleable metal is combined with other materials to form the sensor electrode assembly. This composite approach leverages the ductility of malleable metal while integrating it with the existing touch panel structure, achieving both mechanical durability and electrical functionality
2Reliability
If the sensor electrode part is made more durable against pressing, then it can endure repetitive operations, but the structural complexity increases with additional components like protrusions and contact assistant members
Solution Approach 1:
The patent merges multiple functions into the sensor electrode assembly by integrating the malleable metal electrode with protrusion structures and contact assistant members as a unified component. This consolidation achieves enhanced durability through mechanical deformation capability while avoiding the complexity of separate independent components for each function
Solution Approach 2:
The malleable metal sensor electrode assembly serves multiple functions simultaneously: it acts as the electrical sensing element, provides mechanical compliance through plastic deformation, and maintains contact through its structural design. This multi-functionality reduces the need for separate dedicated components, thereby managing complexity while improving reliability
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 use of malleable metal sensor electrodes prevents damage from repetitive pressing, maintaining signal transmission and extending the lifespan of touch panel components.
Implementation Method 1
the sensor electrode part may be damaged by the pressure, breaking the sensor electrode so that the signal is not transmitted. The break in the sensor electrode acts as an open circuit which is unable to transmit the signal.
Data Source
AI summary
A display substrate includes a first sensor line substantially parallel with the gate line or the data line, a first protrusion portion protruded from the first sensor line, and a first sensor electrode electrically connected to the first protrusion portion. The first sensor electrode includes a malleable metal. The malleable metal can overcome pressure and elastic deformation. Thus, the sensor electrode made from the malleable metal is not easily damaged by pressing the sensor electrode repeatedly.