Bridge Connection Structure for Force-Sensing Sensor Electrostatic Protection
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Solution Overview
Problem
The force-sensing sensors in display panels are prone to electrostatic breakdown during manufacturing due to static electricity generated during the process, which can damage the sensors.
Innovation Solution
The force-sensing sensors are integrated in a non-display area of the panel with signal lines configured in a bridge connection manner, using connection lines in different conduction layers and through-holes to prevent static electricity from reaching the sensors, and the second connection line is made of indium tin oxide to allow laser curing and reduce heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a long connection line is used between the force-sensing sensor and the drive chip, then the sensor can be properly connected and receive bias voltage, but static electricity generated during manufacturing can easily transmit to the sensor causing electrostatic breakdown
Solution Approach 1:
The connection line is divided into multiple segments across different conduction layers (first conduction layer, second conduction layer, third conduction layer) rather than a single long line. Each segment is shorter and isolated by insulation layers, reducing the continuous path for static electricity transmission while maintaining electrical connectivity.
Solution Approach 2:
The connection transitions from a two-dimensional plane to a three-dimensional structure by utilizing multiple conduction layers stacked vertically. The connection lines are distributed across different layers (first, second, third conduction layers) and connected through vertical connections, creating a multi-layer pathway that reduces static electricity transmission risk.
2Device complexity
If the connection line is placed in a single conduction layer, then the structure is simple, but the force-sensing sensor is vulnerable to static electricity damage
Solution Approach 1:
The connection structure is segmented into multiple conduction layers with insulation layers between them. The connection line is divided into segments located in different layers (first, second, third conduction layers), reducing the risk of electrostatic breakdown while maintaining structural organization.
Solution Approach 2:
Insulation layers are introduced as intermediary elements between the conduction layers. These insulation layers act as barriers that prevent static electricity from transmitting directly along the connection path, protecting the force-sensing sensor while allowing electrical connectivity to be maintained through the layered structure.
3Use of energy by moving object
If a traditional metal connection line is used, then electrical conductivity is high, but laser curing of sealant is blocked and heat generation is excessive
Solution Approach 1:
The material parameter of the connection line is changed from traditional metal to indium tin oxide (ITO). This material substitution maintains adequate electrical conductivity while enabling laser curing of sealant (as ITO is transparent to curing wavelengths) and reducing heat generation during operation.
Solution Approach 2:
The connection line uses indium tin oxide, which is a composite material combining indium and tin in an oxide matrix. This composite material provides the necessary electrical conductivity for sensor operation while offering optical transparency for laser curing and superior thermal management properties compared to traditional metals.
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 reduces the risk of electrostatic breakdown damage to the force-sensing sensors during manufacturing, ensuring their functionality and sensitivity while allowing for efficient sealant curing and minimizing heat generation.
Implementation Method 1
the second connection line is made of indium tin oxide to allow laser curing
Implementation Method 2
a first connection line located in a first conduction layer and connected to the force-sensing sensor; a second connection line located in a second conduction layer and connected to the first connection line through a first through-hole
Data Source
AI summary
The present disclosure relates to the field of display technologies and provides a display panel and a display device, for lowering the risk of the force-sensing sensor being damaged by the electrostatic breakdown during the manufacture of the display panel. The display panel includes a force-sensing sensor and first to fourth input signal lines connected to the pressure-sensing sensor. At least one of the first input signal line, the second input signal line, the first output signal line and the second output signal line is a bridge. The bridge includes a first connection line connected to the force-sensing sensor and located in a first conduction layer, a second connection line located in a second conduction layer and connected to the first connection line through a first through-hole, a third connection line located in the first conduction layer and connected to the second connection line through a second through-hole.