OLED Power Supply Wire Layout for Peripheral Heat Reduction
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Solution Overview
Problem
The concentration of current in the first power supply wire in the peripheral region of an organic light emitting diode (OLED) display device leads to increased temperature, potentially causing short circuits and deformation of the insulating layer due to heat generation.
Innovation Solution
The first power supply wire is designed with a wider width and a connection pattern in the peripheral region, along with a greater number of openings for direct contact, to reduce heat generation and spread it over a larger area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the first power supply wire is made narrower to reduce device area, then the area of the peripheral region is reduced, but current concentration increases leading to heat generation and potential short circuits
Solution Approach 1:
The first power supply wire is designed with different widths in different regions: a first width in the first peripheral region and a second width (wider) in the second peripheral region. This local variation in width distributes current more effectively in the second peripheral region, reducing heat concentration and the risk of short circuits while maintaining compact overall device area.
2Temperature
If the first power supply wire is made wider to reduce heat concentration, then heat generation is reduced, but the area of the peripheral region increases
Solution Approach 1:
The first power supply wire has a first width in the first peripheral region and a second width in the second peripheral region. This localized widening only in the second peripheral region addresses heat concentration where it occurs most, without unnecessarily increasing the area of the entire peripheral region.
3Area of stationary object
If the connection pattern is made narrower to reduce device area, then the overall device size is reduced, but heat dissipation capability is reduced
Solution Approach 1:
The connection pattern is configured to overlap with the first power supply wire in the second peripheral region where the wire is wider. This localized adjustment of the connection pattern in the second peripheral region enhances heat dissipation capability where heat concentration is highest, without significantly increasing the overall device size.
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 heat-related defects in the OLED display device by minimizing temperature increases in the power supply wires, preventing short circuits and insulating layer deformation.
Implementation Method 1
current may be concentrated in the first power supply wire disposed in the peripheral region adjacent to the pad region, thereby increasing temperature
Data Source
AI summary
An organic light emitting diode display device includes a substrate, a light emitting layer, a first power supply wire, a second power supply wire, a connection pattern, and an upper electrode. The substrate has a display region, a peripheral region surrounding the display region and including first, second, and third peripheral regions, and a pad region disposed on one side of the peripheral region. The light emitting layer is disposed in the display region on the substrate. The first power supply wire is disposed in the second and third peripheral regions and a part of the first peripheral region on the substrate. The second power supply wire is disposed in the display region, the first peripheral region, and the third peripheral region on the substrate without being disposed in the second peripheral region, and is located inward of the first power supply wire.