OLED Anisotropic Light Ray Adjusting Layer Color Cast
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Solution Overview
Problem
OLED devices face significant color cast issues due to the rapid decrease in blue light intensity as the refraction angle increases, leading to attenuation and poor color temperature.
Innovation Solution
Incorporating anisotropic layers with varying refractive indices and thicknesses to manage refraction angles and optical cavity lengths, ensuring that blue light intensity is maintained by adjusting the refractive index and layer thickness in response to increasing refraction angles, thereby alleviating color cast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the refraction angle increases in the OLED device, then the light extraction efficiency may improve, but the blue light intensity decreases rapidly causing color cast
Solution Approach 1:
The patent applies parameter changes by adjusting the refractive index of the anisotropic layer and its thickness to compensate for the rapid decrease in blue light intensity as refraction angle increases. Specifically, the refractive index is optimized to maintain consistent optical path lengths across different refraction angles, preventing color cast while preserving light extraction efficiency
Solution Approach 2:
The patent implements local quality by using anisotropic layers with direction-dependent refractive indices. The refractive index varies locally based on the propagation direction of light rays, allowing different refraction angles to experience optimized optical paths that maintain blue light intensity and prevent color cast
2Object-affected harmful factors
If anisotropic layers are added to control refraction angles, then color cast is reduced, but device structure becomes more complex
Solution Approach 1:
The anisotropic layer serves multiple functions simultaneously: it controls refraction angles, maintains blue light intensity, prevents color cast, and manages optical cavity length. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving color cast reduction
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 reduces blue light attenuation and minimizes color cast by optimizing the refractive index and thickness of anisotropic layers, ensuring consistent light intensity across different refraction angles, thus enhancing the color temperature and overall performance of OLED devices.
Implementation Method 1
When appropriate voltages are respectively applied to the anode and the cathode, holes of the cathode and charges of the anode are combined in the organic light-emitting layer to generate light
Implementation Method 2
the organic light-emitting layer is configured to generate at least a first incident light ray and a second incident light ray into the first light ray adjusting layer to form a first refracted light ray and a second refracted light ray respectively
Implementation Method 3
the first light ray adjusting layer is an anisotropic layer
Data Source
AI summary
An organic light-emitting diode and a display device are disclosed. The organic light-emitting diode includes an organic light-emitting layer and a first light ray adjusting layer, wherein the organic light-emitting layer is configured to generate at least first incident light and second light to enter the first light ray adjusting layer to form a first refracted light ray and a second refracted light ray respectively, and a refraction angle of the first refracted light ray is smaller than a refraction angle of the first refracted light ray. A first refractive index of the first light ray adjusting layer on a propagation path of the second refracted light ray is greater than that of the first light ray adjusting layer on a propagation path of the first refracted light ray.