OLED Panel Design for Efficient Lighting and Heat Dissipation
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Summary
Problems
Current lighting devices, such as incandescent and fluorescent lamps, face inefficiencies in energy use and color rendering, while LED-based devices have limitations in heat dissipation and require expensive sapphire for nitride semiconductor growth, and have complex manufacturing processes.
Innovation solutions
An OLED panel for lighting devices is developed, featuring a substrate with a taper-shaped auxiliary wiring pattern, a passivation layer with a specific cross-sectional shape, and an encapsulating layer, which reduces the passivation layer's surface area, enhances heat dissipation, and eliminates the need for expensive sapphire, allowing for a larger light emitting area and improved manufacturing efficiency.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If a conventional passivation layer is used to protect the first electrode, then the electrode is protected from moisture, but the light emitting area is reduced due to the large surface area of the passivation layer
Why choose this principle:
The passivation layer is designed with a three-dimensional structure including side surfaces that extend vertically from the substrate. By utilizing the vertical dimension, the passivation layer provides moisture protection along the edges and sides of the electrode structure, thereby enhancing reliability without requiring excessive horizontal coverage that would reduce the light emitting area.
Principle concept:
If a conventional passivation layer is used to protect the first electrode, then the electrode is protected from moisture, but the light emitting area is reduced due to the large surface area of the passivation layer
Why choose this principle:
The passivation layer is segmented into multiple functional regions: a bottom surface in contact with the substrate, side surfaces extending vertically to protect edge areas, and a top surface. This segmentation allows each region to perform its specific protective function efficiently, providing comprehensive moisture resistance while minimizing the overall footprint on the light emitting area.
Application Domain
Data Source
AI summary:
An OLED panel for lighting devices is developed, featuring a substrate with a taper-shaped auxiliary wiring pattern, a passivation layer with a specific cross-sectional shape, and an encapsulating layer, which reduces the passivation layer's surface area, enhances heat dissipation, and eliminates the need for expensive sapphire, allowing for a larger light emitting area and improved manufacturing efficiency.
Abstract
An OLED panel for a lighting device is provided. The OLED panel for a lighting device may include a substrate divided into a light emitting area and a pad area formed outside of the light emitting area; an auxiliary wiring pattern disposed on the substrate, the auxiliary wiring pattern having a taper-shaped cross-section whose width is gradually narrower toward an upper portion thereof; a first electrode disposed on the substrate on which the auxiliary wiring pattern is disposed; a passivation layer disposed on the first electrode within an area where the auxiliary wiring pattern disposed; an OLED light emitting structure disposed on the first electrode on which the passivation layer is disposed; a second electrode disposed on the OLED light emitting structure; and an encapsulating layer disposed on the second electrode, and the passivation layer may have a cross-section corresponding to a cross-section of the auxiliary wiring pattern in the light emitting area. The OLED panel for a lighting device may have a wide light emitting area by reducing a passivation area on the auxiliary wiring pattern.