Sub-Pixel Layout With Color Conversion for Higher Display Luminance
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Solution Overview
Problem
Current display devices face challenges in achieving high light efficiency and luminance while maintaining a simplified manufacturing process, particularly in the arrangement and functionality of sub-pixels emitting different colors.
Innovation Solution
The display device incorporates a substrate with sub-pixels emitting red, green, and blue light, each comprising a light emitting element, a color conversion layer or light scattering layer, and a pixel circuit layer, with a manufacturing method that includes forming light emitting elements, light scattering layers, and color conversion layers to enhance light emission efficiency and simplify the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If traditional manufacturing processes are used for display devices, then manufacturing complexity is reduced, but light efficiency and luminance are insufficient
Solution Approach 1:
The patent merges the light scattering layer and color conversion layer into a single integrated structure positioned above the light emitting element. This combination allows simultaneous optimization of light extraction and color conversion in one manufacturing step, improving luminance and light efficiency without proportionally increasing manufacturing complexity
Solution Approach 2:
The integrated layer structure serves multiple functions: it acts as both a light scattering layer to enhance light extraction efficiency and a color conversion layer to convert blue light to red light. This multi-functionality reduces the number of separate components needed, balancing manufacturing complexity with improved optical performance
2Manufacturing precision
If sub-pixels are arranged with different light emitting elements for each color, then color accuracy is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies different configurations to different sub-pixels based on their specific color requirements. Red sub-pixels include both light scattering and color conversion layers, green sub-pixels include only light scattering layers, and blue sub-pixels include only light emitting elements. This localized differentiation achieves accurate color reproduction while avoiding unnecessary complexity in all sub-pixels
Solution Approach 2:
The display is segmented into different sub-pixel types (red, green, blue) with optimized structures for each. This segmentation allows each sub-pixel to be tailored for its specific color emission requirements, improving overall color accuracy without requiring all sub-pixels to have the same complex structure
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 improves light efficiency and luminance by optimizing the emission of different colors and simplifies the manufacturing process by integrating light scattering and color conversion layers directly in the sub-pixel areas, leading to enhanced display performance.
Implementation Method 1
a light scattering layer including at least one light scattering particle
Implementation Method 2
a first color conversion layer including at least one first color conversion particle
Data Source
AI summary
A display device includes a display area and a non-display area; and a pixel disposed on the display area of a substrate. The pixel includes a first sub-pixel disposed in a first sub-pixel area, the first sub-pixel emitting light of a first color; a second sub-pixel disposed in a second sub-pixel area, the second sub-pixel emitting light of a second color; and a third sub-pixel disposed in a third sub-pixel area, the third sub-pixel emitting light of a third color. Each of two sub-pixels among the first sub-pixel, the second sub-pixel, and the third sub-pixel includes a light emitting element emitting light of the third color, and the other sub-pixel among the first sub-pixel, the second sub-pixel, and the third sub-pixel includes a light emitting element emitting light of a color different from the third color.