Display Substrate Corner ESD Layout for Narrow-Bezel Panels
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Solution Overview
Problem
Thin film transistor display substrates face issues with static electricity accumulation, leading to potential electro-discharge damage during material deposition and separation processes, which existing technologies fail to adequately address, affecting the reliability and efficiency of display products.
Innovation Solution
The display substrate incorporates corner regions with bidirectional electrostatic discharge units and signal lines, where first and second bidirectional electrostatic discharge units are connected through second bidirectional electrostatic discharge units, allowing for efficient electrostatic discharge between signal lines to prevent static electricity accumulation and reduce the area occupied by electrostatic discharge units, thereby improving the screen-to-body ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional electrostatic discharge units are added to protect against static electricity damage, then reliability is improved, but device complexity increases and screen-to-body ratio decreases
Solution Approach 1:
The patent combines multiple electrostatic discharge units into a shared structure where a single second bidirectional electrostatic discharge unit serves multiple first bidirectional electrostatic discharge units. This merging approach reduces the total number of discrete components and simplifies the overall structure while maintaining comprehensive electrostatic protection across the display substrate.
Solution Approach 2:
The second bidirectional electrostatic discharge unit functions as a universal discharge path for multiple different first bidirectional electrostatic discharge units. This multi-functional design allows one component to serve multiple protective roles, reducing complexity and improving the screen-to-body ratio by eliminating redundant structures.
2Reliability
If multiple bidirectional electrostatic discharge units are distributed across the substrate, then reliability is improved, but the screen-to-body ratio deteriorates due to increased space occupation
Solution Approach 1:
Multiple electrostatic discharge functions are merged into a compact shared structure. The second bidirectional electrostatic discharge unit acts as a common discharge path for multiple first bidirectional units, significantly reducing the total area required for electrostatic protection compared to having fully distributed independent units across the substrate.
Solution Approach 2:
The patent reorganizes the spatial arrangement of electrostatic discharge units by creating a hierarchical structure where multiple first bidirectional units connect to a single second bidirectional unit. This dimensional reorganization reduces the footprint area while maintaining protection coverage across the entire display substrate.
3Reliability
If bidirectional electrostatic discharge units are used instead of unidirectional ones, then reliability is improved through better electrostatic discharge capability, but device complexity increases
Solution Approach 1:
The patent merges multiple bidirectional electrostatic discharge units into a shared configuration where the second bidirectional unit serves multiple first bidirectional units. This combination reduces the total number of bidirectional units required while maintaining bidirectional discharge capability, thereby reducing complexity compared to having separate bidirectional units for each discharge path.
Solution Approach 2:
The second bidirectional electrostatic discharge unit provides universal discharge capability for multiple different signal lines through its connection to multiple first bidirectional units. This multi-functional design achieves comprehensive bidirectional protection with fewer components, reducing 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
This configuration effectively reduces the area of the corner regions, enhancing the screen-to-body ratio and preventing static electricity damage to the display substrate, thus improving the reliability and efficiency of display products.
Implementation Method 1
a plurality of groups of first bidirectional electrostatic discharge units and at least one second bidirectional electrostatic discharge unit arranged on the base substrate
Data Source
AI summary
A display substrate, a display panel and a display device are provided. At least one corner region of the display substrate includes: a plurality of first signal lines and at least one second signal line; and a plurality of groups of first bidirectional electrostatic discharge units and at least one second bidirectional electrostatic discharge unit. At least one first bidirectional electrostatic discharge unit includes a first electrostatic discharge end and a second electrostatic discharge end, the first electrostatic discharge end is electrically connected to at least one first signal line, and the second electrostatic discharge end is electrically connected to at least one second signal line through at least one second bidirectional electrostatic discharge unit. The second electrostatic discharge ends of at least two groups of first bidirectional electrostatic discharge units are electrically connected to the at least one second signal line through a same second bidirectional electrostatic discharge unit.