Display Panel ESD Line Layout for Matrix-Driven Light Emission
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Solution Overview
Problem
Existing display devices face challenges in efficiently driving and protecting light emitting devices from static electricity, optimizing light emission efficiency, and reducing power consumption while minimizing assembly processes.
Innovation Solution
A display device with a matrix-form wiring structure, electrostatic discharge structure, and light emission efficiency structures, including light scattering and reflection, to effectively drive multiple light emitting devices, prevent static damage, and enhance light output while reducing power consumption and assembly components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a matrix-form wiring structure is used to drive multiple light emitting devices, then the driving efficiency and light emission efficiency are improved, but the device complexity increases
Solution Approach 1:
The display device is divided into multiple sub-pixels, each containing light emitting devices arranged in a matrix pattern. This segmentation allows independent addressing and control of individual light emitting devices through the matrix wiring structure, improving driving efficiency while managing complexity through modular organization
Solution Approach 2:
The matrix wiring structure serves multiple functions: it provides electrical connections for driving light emitting devices, enables electrostatic discharge protection through dedicated ESD lines, and supports light extraction enhancement structures. This multi-functionality improves overall system efficiency without proportionally increasing complexity
2Reliability
If an electrostatic discharge structure is added to protect light emitting devices, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The electrostatic discharge protection structure is merged with the existing matrix wiring structure. ESD protection lines are integrated into the same substrate and connected to the same pixel electrodes, allowing shared infrastructure to reduce overall device complexity while maintaining reliability
Solution Approach 2:
Dedicated electrostatic discharge lines serve as intermediary pathways between the light emitting devices and ground/reference potentials. These ESD lines provide a controlled path for static discharge without interfering with the normal driving signals, protecting devices while maintaining wiring structure simplicity
3Illumination intensity
If light scattering and reflection structures are added to improve light emission efficiency, then the light output is enhanced, but the device complexity increases
Solution Approach 1:
Light scattering and reflection structures are applied locally at specific interfaces within the light emitting device stack, such as at the substrate interface or electrode surfaces. This localized application enhances light extraction efficiency without requiring complex structures throughout the entire device, managing complexity while improving light output
Solution Approach 2:
The patent employs composite material structures combining different materials with complementary optical properties. For example, combining materials with different refractive indices or adding scattering particles to specific layers creates enhanced light extraction through material composition rather than complex geometric structures
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 solution enables efficient driving of multiple light emitting devices, enhances light emission efficiency, prevents static damage, and reduces power consumption, thereby optimizing the manufacturing process.
Implementation Method 1
an electrostatic discharge line located in the non-display area and disposed on the insulating layer... and each electrostatic discharge pattern... electrically connected to the electrostatic discharge line through a contact hole of the passivation layer
Implementation Method 2
a light emission efficiency improvement structure including a light scattering structure
Implementation Method 3
a light emission efficiency improvement structure including a light reflection structure
Data Source
AI summary
A display device according to embodiments of the present disclosure may include a substrate, an insulating layer disposed on the substrate, and disposed on a display area and a non-display area, an electrostatic discharge line located in the non-display area and disposed on the insulating layer, a passivation layer disposed on the electrostatic discharge line, an organic insulating layer disposed on the passivation layer and having two or more holes located in the non-display area, and two or more electrostatic discharge patterns located in the non-display area and each disposed inside the two or more holes. Each of the two or more electrostatic discharge patterns may be disposed on the passivation layer within the two or more holes, and may be electrically connected to the electrostatic discharge line through a contact hole of the passivation layer.