Display Pad Layout With Integrated ESD Bridges for Narrow Bezels
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Solution Overview
Problem
Display devices face challenges in minimizing non-display areas while preventing damage from static electricity, which can affect the reliability and efficiency of the display device.
Innovation Solution
The implementation of an electrostatic discharge (ESD) protection circuit integrated into the display device, specifically positioned in the peripheral areas and connected to the connection lines, which includes bridges electrically connecting sections of the connection lines to effectively dissipate static electricity and minimize the non-display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ESD protection circuits are added to prevent static electricity damage, then reliability is improved, but device complexity increases
Solution Approach 1:
The ESD protection circuit is merged with the existing connection lines by forming bridges that electrically connect different sections of the connection lines. This integration approach allows the protection function to be added without requiring completely separate protection circuits, thereby improving reliability while minimizing the increase in device complexity.
Solution Approach 2:
The ESD protection is implemented by adding vertical connections (bridges) between different layers of connection lines. This three-dimensional approach allows the protection circuit to be embedded within the existing planar structure, utilizing the vertical dimension to reduce the footprint and minimize impact on the display area.
2Reliability
If ESD protection circuits are integrated into the display device, then reliability is improved, but non-display area increases
Solution Approach 1:
The protection circuit utilizes the vertical dimension by forming bridges between different layers of connection lines. This approach embeds the protection function within the existing three-dimensional structure of the display device, avoiding the need for additional horizontal space that would increase the non-display area.
Solution Approach 2:
The ESD protection circuit is nested within the existing connection line structure by forming bridges that connect different sections of the same connection lines. This nesting approach allows the protection function to be housed within the existing circuit layout, minimizing the additional area required.
3Object-affected harmful factors
If bridges are formed to connect connection lines, then static electricity dissipation is improved, but manufacturing precision requirements increase
Solution Approach 1:
The connection lines are segmented into different sections that are connected by bridges. This segmentation allows the ESD protection function to be distributed along the connection lines, reducing the precision requirement for each individual bridge while maintaining overall effective protection through multiple connection points.
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 solution effectively prevents damage from static electricity while minimizing the non-display area, ensuring the display device's reliability and efficiency by integrating ESD protection circuits within the display device's design.
Implementation Method 1
an electrostatic discharge protection circuit integrated into the display device... connected to the connection lines... effectively dissipate static electricity
Data Source
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AI summary
A display device (10) may include a substrate (100), a pixel (PX), a transistor (T1), a data line (DL), a connection line (200), a pad (PAD), and an electrostatic discharge protection circuit (A, B, E, D; 250). The substrate (100) may include a display area (DA) and a pad area (PADA). The pad area (PADA) may overlap the display area (DA). The pixel (PX) may be supported by the display area (DA) and may include a pixel electrode (410). The data line (DL) may be electrically connected through the transistor (T1) to the pixel electrode (410). The connection line (200) may be supported by the display area (DA) and may be electrically connected through the data line (DL) to the transistor (T1). The pad (PAD) may be supported by the pad area (PADA) and may be electrically connected through the connection line (200) to the data line (DL). The electrostatic discharge protection circuit (A, B, E, D; 250) may be electrically connected to the connection line (200).