OLED Power Supply Plate Recess Pattern for Heat Dissipation
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Solution Overview
Problem
Organic light-emitting displays (OLEDs) are susceptible to external moisture and heat generation at power supply wiring connections, which can degrade the devices and affect display quality.
Innovation Solution
The OLED design incorporates a substrate with a recess pattern on the power supply plate, where the extension electrode covers the recess pattern, and includes multiple connection electrodes to distribute power and reduce heat generation, with the recess pattern surrounding the display area to protect against moisture and dissipate heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the power supply wiring is connected directly to the extension electrode without recess pattern, then the electrical connection is simple and direct, but heat generation increases and moisture protection is reduced
Solution Approach 1:
The power supply plate is divided into multiple segments by forming recess patterns that create separate contact regions. This segmentation increases the surface area for electrical contact while distributing heat generation across multiple regions, thereby reducing peak temperature and improving thermal management without significantly complicating the overall structure.
Solution Approach 2:
The extension electrode is designed to cover and nest over the recess patterns on the power supply plate. This nested configuration allows the electrode to make contact with multiple segmented regions simultaneously, increasing contact area for better heat dissipation while maintaining a compact integrated structure that does not add significant complexity.
2Temperature
If the power supply wiring connection region is enlarged to reduce heat density, then heat generation is controlled, but the area occupied by wiring increases
Solution Approach 1:
The recess patterns create localized contact regions with different properties - the recessed areas provide enhanced thermal management and electrical contact, while the surrounding areas maintain their original functions. This local modification allows heat dissipation improvement without requiring a large increase in overall wiring area.
Solution Approach 2:
Instead of expanding the wiring area in two dimensions, the recess patterns utilize the third dimension by creating depth variations in the power supply plate. This vertical dimensionality change increases the effective contact surface area for heat dissipation without significantly increasing the planar footprint of the wiring region.
3Reliability
If the extension electrode covers the recess pattern, then moisture protection is improved and heat is dissipated, but the manufacturing process becomes more complex
Solution Approach 1:
The recess patterns are formed in the power supply plate before the extension electrode is deposited. This preliminary action allows the electrode to be formed as a continuous layer that naturally conforms to the recess patterns during a single deposition process, rather than requiring subsequent complex assembly steps to achieve the same moisture protection effect.
Solution Approach 2:
The formation of the extension electrode and the recess pattern structure are combined into an integrated manufacturing process where the electrode is deposited over the pre-formed recesses in a single step. This merging of operations simplifies the overall manufacturing process compared to alternative approaches that would require separate steps for creating the recesses and then assembling the electrode.
Data Source
AI summary
Provided are an organic light-emitting display (OLED) and a method of manufacturing the same. According to an aspect of the present invention, there is provided an OLED comprising a substrate which comprises a display area and a non-display area adjacent to the display area, an organic light-emitting device which is located on the display area of the substrate and comprises a first electrode, an organic light-emitting layer and a second electrode stacked sequentially, a power supply plate which is located on the non-display area of the substrate, and an extension electrode which is located on the non-display area of the substrate and extends from the second electrode to be connected to the power supply plate, wherein at least one recess pattern is formed on the power supply plate, and the extension electrode covers the recess pattern.