OLED Color Conversion Layer Integration for Thinner Display Panels
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Solution Overview
Problem
The application of color conversion technology in OLED display panels results in a thick display panel due to multiple layers, leading to color cast issues.
Innovation Solution
A display panel design incorporating a substrate, sub-pixels with light-emitting elements, and a color conversion layer that includes red and green conversion layers, where the organic encapsulation layer is reused as the color conversion layer to reduce thickness and prevent color cast, with the layers having different areas or thicknesses to optimize color conversion efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If color conversion technology is applied in OLED display panel with multiple layers, then color conversion function is achieved, but display panel thickness increases
Solution Approach 1:
The patent combines the color conversion layer with the encapsulation layer into a single integrated structure. The encapsulation layer serves dual purposes: protecting the light-emitting element and performing color conversion by incorporating conversion particles, thereby eliminating the need for a separate color conversion layer and reducing overall panel thickness.
Solution Approach 2:
The encapsulation layer is designed to perform multiple functions simultaneously: it provides mechanical protection and chemical barrier functions as a traditional encapsulation layer, while also serving as the color conversion medium by embedding conversion particles within it, thus achieving multi-functionality in a single layer.
2Reliability
If multiple layers are used for color conversion in OLED display panel, then color conversion capability is improved, but color cast occurs
Solution Approach 1:
The patent employs different types of conversion particles with specific characteristics (size, material composition, conversion wavelength) distributed in different regions or layers to achieve precise color control. By optimizing the local properties of conversion particles, the system achieves accurate color reproduction without color cast while maintaining effective color conversion.
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 configuration enables a thinner and lighter display panel with improved color purity and reduced probability of color cast, while maintaining manufacturing simplicity and encapsulation reliability.
Implementation Method 1
The color conversion layer is configured to convert a color of light emitted by the light-emitting element. The red conversion layer is configured to convert blue light into red light, and the green conversion layer is configured to convert blue light into green light.
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a substrate, a plurality of sub-pixels, and a color conversion layer. At least one sub-pixel of the plurality of sub-pixels each includes a light-emitting element. The color conversion layer is configured to convert a color of light emitted by the light-emitting element. The at least one light-emitting element of the at least one sub-pixel includes at least one blue light light-emitting element. The color conversion layer includes a red conversion layer and a green conversion layer, the red conversion layer is configured to convert blue light into red light, and the green conversion layer is configured to convert blue light into green light. The red conversion layer and the green conversion layer have different areas or different thicknesses.