Gate Driver Protective Metal Layer for Heat-Resistant Displays
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Solution Overview
Problem
Display devices face challenges with static electricity affecting gate drivers and the risk of peeling or lifting between the organic layer and the protective metal layer during high-temperature deposition processes.
Innovation Solution
Incorporating a protective metal layer on the gate driver to receive a low potential voltage and a layer with holes to discharge heat and prevent peeling, ensuring the protective metal layer covers the gate driver and via layer surfaces, and using a second layer to fill holes and connect with the power connection line for effective voltage supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective metal layer is added to protect the gate driver from static electricity, then the reliability of the gate driver is improved, but the device complexity increases
Solution Approach 1:
The protective metal layer is designed to serve multiple functions simultaneously: it protects the gate driver from static electricity discharge, provides a low-potential voltage supply path, and acts as a thermal management layer during high-temperature deposition. By consolidating these functions into a single structural element rather than adding separate components for each function, the patent improves reliability without proportionally increasing device complexity.
Solution Approach 2:
The protective metal layer is segmented into a first layer and a second layer with different configurations. The first layer has holes for heat discharge and is connected to power connection lines, while the second layer fills these holes and provides continuous coverage. This segmentation allows each layer to specialize in specific functions (thermal management vs. electrostatic protection), resolving the contradiction by making the complex structure functionally efficient.
2Reliability
If the protective metal layer is made continuous to improve protection, then the electrostatic protection is improved, but the heat discharge capability deteriorates
Solution Approach 1:
The protective metal layer is divided into two distinct layers with complementary characteristics. The first layer contains holes that enable heat discharge pathways, preventing heat accumulation during high-temperature deposition. The second layer fills these holes to provide continuous metal coverage for effective electrostatic protection and low-potential voltage supply. This segmentation resolves the contradiction by allowing each layer to optimize for its primary function while the combined structure achieves both goals.
Solution Approach 2:
Different regions of the protective metal layer structure have different properties: the first layer has localized holes in specific positions to facilitate heat discharge, while the second layer provides uniform continuous coverage for electrostatic protection. This local differentiation of quality allows the structure to simultaneously achieve heat management and electrostatic protection without compromise.
3Temperature
If holes are added to the protective metal layer for heat discharge, then the heat management is improved, but the electrostatic protection capability deteriorates
Solution Approach 1:
The protective metal layer is segmented into two functional layers. The first layer contains holes for heat discharge pathways, addressing the thermal management requirement. The second layer fills these holes completely, restoring continuous metal coverage for effective electrostatic protection and low-potential voltage supply. This segmentation resolves the contradiction by allowing the hole structure to serve thermal functions while the filling layer restores electrical protection functions.
4Reliability
If a second layer is added to fill holes and connect to power lines, then the voltage supply reliability is improved, but the manufacturing complexity increases
Solution Approach 1:
The second layer of the protective metal layer is merged with the power connection line structure, allowing the same metal deposition process to create both the voltage supply pathway and the electrostatic protection layer. By combining these functions into a single manufacturing step rather than requiring separate processes, the patent improves voltage supply reliability without proportionally increasing manufacturing 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
The solution effectively protects the gate driver from static electricity and reduces the likelihood of peeling between the organic and metal layers, enhancing the reliability and durability of the display device.
Implementation Method 1
a protective metal layer overlapping the gate driver, and including a first layer at a same layer as the first electrode and the second electrode
Implementation Method 2
the first layer defining first holes, and a second layer at a same layer as the first contact electrode, at least partially filling the first holes
Data Source
AI summary
A display device includes a display area, a non-display area, a pixel circuit including a thin film transistor, a gate driver in the non-display area for supplying a gate signal to the pixel circuit, a via layer above the pixel circuit and the gate driver, first and second electrodes above the via layer in the display area, and extending substantially in parallel with each other, a light-emitting element between the first electrode and the second electrode, a first contact electrode connected to one end of the light-emitting element, and a protective metal layer overlapping the gate driver, and including a first layer at a same layer as the first electrode and the second electrode, the first layer defining first holes, and a second layer at a same layer as the first contact electrode, at least partially filling the first holes, and contacting an upper surface of the via layer.