Organic EL Lighting Device Heat Diffusion Plate Integration
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Solution Overview
Problem
Existing organic EL lighting devices face issues with biased luminous intensity due to heat distribution from driver circuits and increased size from separate rectifier circuits, particularly when handling large currents.
Innovation Solution
Integration of a planar heat diffusion plate with a constant current circuit and a rectifier circuit element within the organic electroluminescence lighting device to diffuse heat and perform full-wave rectification, respectively, addressing the bias in luminous intensity and miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If driver circuits are arranged along two sides on the substrate, then the organic EL display device achieves miniaturization and integration, but heat generated from the driver circuits is transmitted biasedly to the organic EL element, causing luminous intensity bias
Solution Approach 1:
A heat diffusion plate is introduced as an intermediary component between the driver circuits and the organic EL element. This plate diffuses the heat generated by the driver circuits before it reaches the organic EL element, preventing biased heat transmission and ensuring uniform luminous intensity across the display device while maintaining the integrated miniaturized structure.
2Illumination intensity
If a rectifier circuit is connected between the alternating current power supply and the organic EL element, then blinking light emission is suppressed, but the organic EL lighting device is increased in size
Solution Approach 1:
The rectifier circuit is merged with the organic EL element to form an integrated structure. This combination allows the rectifier circuit to suppress blinking light emission while maintaining compact device dimensions, as the rectifier circuit shares the same substrate and structural space with the organic EL element rather than being a separate component.
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 suppresses heat-induced bias in luminous intensity and achieves miniaturization by diffusing heat and integrating rectification, enhancing thermal management and device compactness.
Implementation Method 1
a planer heat diffusion plate provided on one surface of the organic electroluminescence element; and a constant current circuit element that is placed so as to contact the heat diffusion plate
Implementation Method 2
An organic EL element is an element that emits light in proportion to a current quantity
Implementation Method 3
a rectifier circuit element that is placed integrally with the organic electroluminescence element, and performs full-wave rectification for an alternating current supplied from an outside
Data Source
AI summary
An organic electroluminescence lighting device includes a planar organic electroluminescence element; a planer heat diffusion plate provided on one surface of the organic electroluminescence element; and a constant current circuit element that is placed so as to contact the heat diffusion plate and supplies a constant current to the organic electroluminescence element.