Insulating Heat Conducting Layer for OLED Thermal Management
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Solution Overview
Problem
AMOLED display panels face issues with heat dissipation, leading to shifts in luminescent chromaticity, reduced luminous efficiency, and shortened product life due to heat generation during the light emitting process.
Innovation Solution
Incorporating a heat conducting layer made of insulating heat conduction material, such as a BeO film, connected to the scan line, data line, and first electrode in the OLED unit to enhance heat dissipation, with optional additional heat conducting layers covering the scan and data lines and connected through via holes for improved thermal management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional OLED structure is used, then the display achieves light emission and basic functionality, but heat accumulates causing chromaticity shift, efficiency reduction, and shortened product life
Solution Approach 1:
An insulating heat conduction layer is introduced as an intermediary component between the first electrode and the substrate. This layer mediates heat transfer from the electrode while maintaining electrical insulation, thereby resolving the contradiction between needing heat dissipation and maintaining electrical isolation in the OLED structure
Solution Approach 2:
The patent changes the thermal parameter of the OLED structure by incorporating materials with specific thermal conductivity characteristics in the heat conduction layer. This parameter change enables effective heat dissipation pathways without compromising the electrical performance, thus extending product life while managing temperature
2Illumination intensity
If the OLED operates at high brightness, then luminous efficiency is improved, but heat generation increases causing chromaticity shift and efficiency reduction
Solution Approach 1:
The patent converts the harmful heat generation by high-brightness operation into a beneficial heat dissipation pathway. The insulating heat conduction layer captures and directs the heat energy away from the luminescent materials, allowing high brightness operation without the usual chromaticity shift and efficiency reduction
3Temperature
If the heat conducting layer is connected to the first electrode, then heat dissipation is improved, but the electrical insulation requirement must be maintained
Solution Approach 1:
The patent employs composite material structure where the heat conduction layer combines thermal conductivity with electrical insulation properties. This composite approach enables simultaneous heat dissipation and electrical isolation, improving heat dissipation without significantly increasing device 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 addresses heat-related issues by improving heat dissipation, stabilizing luminescent chromaticity, maintaining luminous efficiency, and extending the product life of AMOLED display panels.
Implementation Method 1
a heat conducting layer, formed of an insulating heat conduction material and connected to the scan line, the data line, and the first electrode in the OLED unit
Implementation Method 2
an OLED unit, including a first electrode, a second electrode, and an organic light emitting layer formed between the first electrode and the second electrode
Data Source
AI summary
The present disclosure relates to an organic light emitting diode (OLED) display panel, an OLED display and an OLED unit. The OLED display panel includes: a scan line, extending along a first direction; a data line, extending along a second direction perpendicular to the first direction; an OLED unit, including a first electrode, a second electrode, and an organic light emitting layer formed between the first electrode and the second electrode; and a heat conducting layer, formed of an insulating heat conduction material and connected to the scan line, the data line, and the first electrode in the OLED unit.