Display Panel ESD Structure With UV-Transmitting Metal Layers
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Solution Overview
Problem
Existing display panel technologies face challenges in electrostatic discharge (ESD) during manufacturing, leading to yield loss, insufficient storage capacitance, poor seal gum curing, high complexity in driving designs, and difficulties in achieving narrow bezels and high resolution while maintaining reliability and cost-effectiveness.
Innovation Solution
An electrostatic protection structure with a double-layer metal design and light-transmitting parts, combined with a fan-out transmission system and extended metal layers, enhances electrostatic protection and UV light transmission, while optimizing pixel capacitance and reducing bezel size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional single-layer metal electrostatic protection structure is used, then the structure is simple, but it provides insufficient electrostatic discharge absorption and poor seal gum curing
Solution Approach 1:
The patent employs a composite structure consisting of a first metal layer (such as aluminum or aluminum alloy) and a second metal layer (such as silver or silver alloy) stacked in sequence. This composite metal structure combines the advantages of different materials: the aluminum layer provides cost-effectiveness and basic electrostatic protection, while the silver layer enhances electrostatic discharge absorption and UV light transmission. The composite structure achieves superior electrostatic protection effectiveness and seal gum curing without requiring overly complex design
Solution Approach 2:
The patent transitions from a single-layer (one-dimensional) metal structure to a multi-layer stacked structure (adding vertical dimensionality). By stacking the first metal layer and second metal layer in the vertical direction, the patent increases the electrostatic protection capability and UV light transmission in the normal direction of the substrate, effectively resolving the contradiction between protection effectiveness and structural simplicity
2Area of stationary object
If the bezel area is reduced to achieve narrow bezels, then the display area increases, but electrostatic protection capability deteriorates
Solution Approach 1:
The patent applies different metal layers with specific properties to different functional requirements within the electrostatic protection structure. The first metal layer (aluminum-based) provides cost-effective electrostatic protection, while the second metal layer (silver-based) specifically enhances UV light transmission for seal gum curing. This local differentiation of material properties allows the structure to maintain electrostatic protection capability even when the overall bezel area is reduced
Solution Approach 2:
The composite metal structure with differentiated layer functions enables the patent to maintain electrostatic protection effectiveness while reducing bezel size. The specific combination of aluminum and silver layers provides both electrostatic discharge absorption and enhanced UV light transmission, allowing narrow bezel design without compromising protection capability
3Reliability
If opaque metal layers are used for electrostatic protection, then electrostatic discharge is blocked, but UV light transmission for seal gum curing is reduced
Solution Approach 1:
The patent uses the second metal layer (silver or silver alloy) with specific optical properties to selectively enhance UV light transmission in the wavelength range required for seal gum curing (300-400nm), while the first metal layer (aluminum-based) provides the primary electrostatic protection. This local differentiation of material properties at the nanoscale allows simultaneous achievement of electrostatic protection and UV light transmission
Solution Approach 2:
The patent changes the material parameters of the metal layers, specifically using silver or silver alloy for the second layer which has higher UV light transmission characteristics in the 300-400nm range compared to traditional opaque metals. This parameter change enables the structure to transmit UV light effectively for seal gum curing while maintaining electrostatic protection functionality
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 proposed structure effectively absorbs ESD, improves seal gum curing, reduces bezel size, and maintains high resolution and reliability, enhancing manufacturing yield and panel performance.
Implementation Method 1
the effects of ESD can significantly reduce the yield rate of display panels... when a large instantaneous current flows through an indium tin oxide (ITO) electrode, it can cause oxygen atoms to escape
Implementation Method 2
The temperature during ESD is above 3000° C., which is higher than the melting points of materials commonly used in TFT array substrates
Implementation Method 3
improves seal gum curing... combined with a fan-out transmission system and extended metal layers, enhances electrostatic protection and UV light transmission
Data Source
AI summary
The present application relates to an electrostatic protection structure for a display panel. The display panel comprises a substrate, a pixel array, a plurality of scan lines, a plurality of data lines, and an electrostatic protection structure. The substrate has a display region and a non-display region, which includes a bezel area. The pixel array is disposed on the display region of the substrate and comprises a plurality of pixel units arranged in an array. The scan lines are formed on the substrate and electrically connected to each row of pixel units in the pixel array. The data lines are formed on the substrate and electrically connected to each column of pixel units in the pixel array. The electrostatic protection structure is disposed in the bezel area and comprises a first metal layer, a first insulating layer, a second metal layer, and a second insulating layer stacked in sequence.