OLED Display Power Line Layout for Narrow Bezels and Clean Sealing
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Solution Overview
Problem
Organic light emitting diode (OLED) displays face challenges in minimizing the width of the non-display area and suppressing internal contamination, which affects the efficiency and reliability of the display.
Innovation Solution
The OLED display design includes a common power supply line formed on the same layer as the second data wire, overlapping the circuit unit, and a heat reflection part made of the same material as the data wires, positioned between the sealing part and the substrate, but not in contact with the power supply line or circuit unit, to minimize the non-display area and prevent heat-induced contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the common power supply line is positioned separately from the data wires, then electrical connection reliability is improved, but the non-display area width increases
Solution Approach 1:
The common power supply line is formed on the same layer as the second data wire, allowing the power supply line to overlap with the circuit unit while sharing the same physical layer structure. This merging approach reduces the overall non-display area width while maintaining electrical connection reliability through the overlapping configuration.
Solution Approach 2:
The patent utilizes vertical layering to resolve the spatial conflict. By forming the common power supply line on the same layer as the second data wire and allowing overlap, the solution moves from a planar separation problem to a three-dimensional spatial arrangement, enabling both compact width and reliable electrical connections.
2Temperature
If heat reflection part is positioned close to the substrate, then heat management efficiency is improved, but internal contamination risk increases
Solution Approach 1:
The heat reflection part is positioned between the sealing part and the substrate, acting as an intermediary element. It reflects heat away from the substrate while maintaining sufficient distance to prevent contamination. The heat reflection part serves as a mediator that manages thermal energy without direct contact with heat-sensitive components.
Solution Approach 2:
The heat reflection part is extracted as a separate functional element positioned specifically to manage heat without contacting the substrate or circuit components. This separation allows effective heat reflection while preventing the heat reflection part from becoming a source of internal contamination.
3Area of stationary object
If the non-display area width is minimized, then display area efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The common power supply line is merged with the data wire layer structure, forming both on the same layer. This reduces the number of separate manufacturing steps and materials needed, thereby minimizing manufacturing complexity while achieving compact non-display area width for improved display efficiency.
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 design effectively reduces the width of the non-display area and suppresses internal contamination by minimizing heat transmission to critical components, enhancing the display's efficiency and reliability.
Implementation Method 1
a heat reflection part in contact with the sealing part between the sealing part and the substrate
Data Source
AI summary
An organic light emitting diode display includes: a substrate including a display area and a non-display area adjacent to the display area; a pixel thin film transistor positioned in the display area of the substrate; a first data wire positioned on the pixel thin film transistor; a second data wire positioned on the first data wire; an organic light emitting element positioned on the second data wire and electrically connected to the pixel thin film transistor through the first data wire and the second data wire; a circuit unit positioned in the non-display area of the substrate and including a circuit thin film transistor electrically connected to the pixel thin film transistor; and a common power supply line overlapping at least part of the circuit unit, electrically connected to the organic light emitting element, and formed on a same layer as the second data wire.