Flexible Organic Light-Emitting Device for Wide Temperature Operation
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Solution Overview
Problem
Conventional light-emitting devices fail to operate effectively across a wide temperature range, particularly in high-temperature and low-temperature environments, such as direct sunlight or cold regions, leading to reliability and performance issues.
Innovation Solution
A light-emitting device comprising a light-emitting panel, a secondary battery, and a circuit with an antenna, where the secondary battery overlaps with the light-emitting panel and circuit, enabling wireless charging, and the light-emitting element uses a light-emitting organic compound with a glass transition temperature of 100°C or higher, allowing operation from 0°C to 100°C, and the device is sealed in a flexible structure for enhanced durability and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional light-emitting devices are used, then they can operate in standard conditions, but they fail to operate effectively in high-temperature and low-temperature environments
Solution Approach 1:
The patent changes the material parameters of the light-emitting element by using an organic EL element with specific materials that have high glass transition temperatures, enabling operation across a wide temperature range from -40°C to 100°C. The secondary battery also uses specific electrolyte formulations that maintain performance across extreme temperatures.
Solution Approach 2:
The device employs composite material structures including the organic EL element with multiple functional layers (hole injection layer, hole transport layer, light-emitting layer, electron transport layer, electron injection layer) and the secondary battery with composite electrolyte systems, creating a device that maintains reliability across varying temperature conditions.
2Weight of moving object
If the light-emitting device is made thin and lightweight, then portability is improved, but structural durability may be compromised
Solution Approach 1:
The patent uses flexible film substrates for both the light-emitting panel and secondary battery, creating a thin and lightweight device. The flexible substrate structure maintains structural integrity while enabling portability, with the organic EL element and battery both constructed on flexible bases that can withstand bending and handling.
3Ease of manufacture
If the light-emitting element uses organic compounds with low glass transition temperature, then ease of manufacture is improved, but heat resistance deteriorates
Solution Approach 1:
The patent specifically selects organic compounds with glass transition temperatures of 100°C or higher for the light-emitting layer, hole transport layer, and electron transport layer. This parameter change ensures heat resistance while maintaining the ease of organic EL manufacturing processes such as vacuum deposition and solution processing.
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 provides a light-emitting device that is thin, lightweight, flexible, and operates reliably across a wide temperature range, reducing power consumption and increasing usage time per charge, while maintaining high heat resistance and safety.
Implementation Method 1
Light-emitting elements utilizing electroluminescence (EL)
Implementation Method 2
The circuit has a function of charging the secondary battery wirelessly
Data Source
AI summary
To provide a light-emitting device capable of being used in a wide temperature range. To provide a light-emitting device capable of being used in a low-temperature environment and a high-temperature environment. The light-emitting device includes a light-emitting panel, a secondary battery, a circuit, and a sealing structure. The light-emitting panel includes a light-emitting element. The light-emitting element can emit light with power supplied from the secondary battery. The circuit includes an antenna and can charge the secondary battery wirelessly. The light-emitting panel, the secondary battery, and the circuit are provided in the sealing structure. The sealing structure includes a portion through which light emitted from the light-emitting element passes.