Blue OLED Color Conversion Layout for Thinner Panels and Less Color Cast
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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 blue light-emitting elements, a color conversion layer that converts blue light into red and green light, and a color filter layer with overlapping red and green color resists, which reduces thickness and minimizes color cast by reusing organic encapsulation layers for color conversion and filtering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
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 and color filter layer into a single integrated structure. The color conversion layer includes red, green, and blue conversion layers that directly form the color filtering function, eliminating the need for a separate color filter layer. This merging reduces the overall number of layers and thickness of the display panel while maintaining the color conversion and filtering functions.
Solution Approach 2:
The color conversion layer is designed to perform multiple functions simultaneously: it converts the wavelength of light from the light-emitting element and acts as a color filter. By making the color conversion layer multi-functional, the patent eliminates the need for separate color filter layers, thereby reducing panel thickness while achieving both color conversion and color filtering.
2Manufacturing precision
If multiple layers are used for color conversion and filtering, then color accuracy is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges the color conversion layer and color filter layer into a single integrated structure. The color conversion layer includes red, green, and blue conversion layers that directly form the color filtering function, eliminating the need for a separate color filter layer. This merging reduces the overall number of layers and thickness of the display panel while maintaining the color conversion and filtering functions.
Solution Approach 2:
The color conversion layer is designed to perform multiple functions simultaneously: it converts the wavelength of light from the light-emitting element and acts as a color filter. By making the color conversion layer multi-functional, the patent eliminates the need for separate color filter layers, thereby reducing panel thickness while achieving both color conversion and color filtering.
3Use of energy by moving object
If thick display panel structure is used for color conversion, then color conversion efficiency is improved, but oblique light transmission to adjacent color resists increases
Solution Approach 1:
The patent applies local quality by making each conversion layer (red, green, blue) have specific optical properties tailored to its function. The color conversion layer is designed with localized light conversion capabilities that direct converted light vertically, reducing oblique light transmission to adjacent color resists while maintaining high color conversion efficiency in each local region.
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 oblique light transmission to adjacent color resists, effectively addressing the color cast issue while maintaining manufacturing simplicity.
Implementation Method 1
The color conversion layer is configured to convert a color of light emitted by the 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.
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a substrate, sub-pixels, a color conversion layer, and a color filter layer. At least one sub-pixel each includes a light-emitting element. The at least one light-emitting element of the at least one sub-pixels includes at least one blue light light-emitting element. The color conversion layer is configured to convert a color of light emitted by the light-emitting element. The color conversion layer includes red and green conversion layers. 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 color filter layer includes red and green color resists. In a direction perpendicular to a plane of the substrate, the red color resist overlaps the red conversion layer, and the green color resist overlaps the green conversion layer.