Display Panel ESD Circuit Placement for Shorter Data Wires
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Solution Overview
Problem
Conventional electrostatic discharge circuits in display panels have inadequate discharge effectiveness due to excessive data wire length and vulnerability to damage, affecting display quality and reliability.
Innovation Solution
The electrostatic discharge circuit is strategically located between the encapsulation area and the display area, with shortened data wire lengths and protected by the encapsulation layer, enhancing discharge efficiency and reducing the risk of damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrostatic discharge circuit is located in the peripheral area with conventional layout, then the circuit can be provided to protect the display panel, but the data wire length becomes excessive and discharge effectiveness is insufficient
Solution Approach 1:
The electrostatic discharge circuit is repositioned from a conventional peripheral location to a position within the display area, specifically in the pixel circuit region. This spatial reconfiguration reduces the distance between the electrostatic discharge circuit and the data signal lines, thereby shortening the data wire length and improving discharge effectiveness without compromising the protective function.
Solution Approach 2:
The patent utilizes the pixel circuit area within the display area as a suitable location for the electrostatic discharge circuit. By selecting a specific local region (the pixel circuit region) with appropriate characteristics, the circuit achieves both protection functionality and reduced wire length, as this area is already part of the active display region and has suitable electrical properties.
2Reliability
If the electrostatic discharge circuit is placed closer to the display area to reduce wire length, then discharge effectiveness improves, but the circuit becomes more vulnerable to damage
Solution Approach 1:
The pixel circuit region within the display area provides a locally optimized environment for the electrostatic discharge circuit. This region has suitable electrical characteristics and is integrated with the display structure, allowing the circuit to achieve both improved discharge quality through shorter wire lengths and adequate protection through the inherent structural integration with the pixel circuits.
Solution Approach 2:
The electrostatic discharge circuit is merged with the pixel circuit region, combining two functional elements in the same spatial location. This integration allows the electrostatic discharge circuit to benefit from the structural support and electrical environment of the pixel circuits while maintaining its protective function, effectively addressing both discharge quality and circuit protection requirements.
3Ease of manufacture
If conventional electrostatic discharge circuits are used, then basic protection is provided, but discharge effectiveness is insufficient and the circuit remains vulnerable to damage
Solution Approach 1:
The patent moves the electrostatic discharge circuit into the display area dimension, specifically utilizing the pixel circuit region. This spatial transition from peripheral to internal location improves discharge effectiveness by reducing wire lengths while maintaining manufacturing feasibility through integration with existing pixel circuit fabrication processes.
Data Source
AI summary
The present disclosure provides a display panel and a display device. The display panel includes: a base substrate including a display area and a peripheral area surrounding the display area; a plurality of sub-pixels; a plurality of data signal lines; a plurality of data wires located in the peripheral area and electrically connected to the plurality of data signal lines; an electrostatic discharge circuit located in the peripheral area on the base substrate, and electrically connected to the plurality of data wires; and an encapsulation layer located on a side of the plurality of sub-pixels and the electrostatic discharge circuit away from the base substrate, wherein an orthographic projection of the electrostatic discharge circuit on the base substrate is located within an orthographic projection of the encapsulation layer on the base substrate.