OLED Display Substrate Heat Dissipation Layer Design
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Solution Overview
Problem
OLED display substrates face limitations due to excessive temperature, which can affect their normal operation and user experience, especially in applications like mobile terminals and head-mounted devices, where high temperatures can impact service life and display functionality.
Innovation Solution
A display substrate design that incorporates a heat dissipation layer between the base substrate and display elements, with electrodes connected via heat conducting structures to efficiently transfer and dissipate heat, utilizing materials like diamond-like materials, aluminum nitride, graphene, or carbon nanotubes for enhanced thermal conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If OLED display substrate area or brightness is increased, then display performance is improved, but heat generation increases causing excessive temperature
Solution Approach 1:
The patent extracts the heat dissipation function from the base substrate by introducing a dedicated heat dissipation layer. This layer is positioned between the base substrate and display elements, specifically extracting heat away from the active display regions to prevent excessive temperature buildup while maintaining display performance
Solution Approach 2:
The patent introduces heat conducting structures as intermediary components that mediate heat transfer between the display elements and the heat dissipation layer. These structures act as thermal conduits, efficiently transporting heat from the electrode regions through the insulating layers to the heat dissipation layer, thereby resolving the contradiction between maintaining heat generation for brightness and preventing excessive temperature
2Temperature
If heat dissipation structures are added to reduce temperature, then temperature control is improved, but device structure becomes more complex
Solution Approach 1:
The heat dissipation layer is designed to serve multiple functions: it acts as a thermal management component, a structural support layer, and potentially a barrier layer. The heat conducting structures simultaneously provide thermal conduction and electrical insulation functions by integrating with the existing insulating layer structure, thereby reducing overall device complexity while achieving effective temperature control
Solution Approach 2:
The patent merges the heat conducting structures with the existing insulating layers, where the heat conducting structures penetrate through the insulating layers rather than being separate additions. This integration approach combines thermal management functionality with the existing device architecture, minimizing structural complexity while achieving effective heat dissipation
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 temperature of the display substrate, preventing excessive heat from affecting normal operation and improving user experience by ensuring efficient heat dissipation and extending the service life of OLED display elements.
Implementation Method 1
an electrode of at least one of the plurality of display elements is connected to the heat dissipation layer via at least one heat conducting structure
Implementation Method 2
a heat dissipation layer arranged between the substrate and the plurality of display elements
Data Source
AI summary
Provided is a display substrate, a method for preparing the same, and a display device. The display substrate includes a plurality of display elements arranged on a base substrate and a heat dissipation layer arranged between the substrate and the plurality of display elements, in which an electrode of at least one of the plurality of display elements is connected to the heat dissipation layer via at least one heat conducting structure.