White-Light Display Panel With Red Conversion Layer for Color Rendering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
White light-emitting diode devices have a low color rendering index, resulting in poor color reproduction performance.
Innovation Solution
A display panel is designed with a light-converting layer doped with red light-emitting particles on an array substrate, which converts other lights into red light, enhancing the color rendering index by integrating the light-converting layer between the transistor layer and the light-emitting structure, and including a protective layer to improve stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a white light-emitting diode device uses a simple structure with electron transport layer, light-emitting layer, and hole transport layer, then the device structure is simple, but the color rendering index is low
Solution Approach 1:
The device is segmented into functional modules: light-emitting units (red, green, blue) and a light-converting layer. This segmentation allows each module to specialize in specific wavelength emission, with the light-converting layer handling wavelength transformation, thereby improving color rendering while maintaining structural organization.
Solution Approach 2:
The light-converting layer acts as an intermediary between the light-emitting units and the final output. It receives light from the light-emitting units and converts specific wavelengths (e.g., converting blue light to red light), thereby improving color rendering index without requiring direct modification of the light-emitting units themselves.
2Reliability
If the light-converting layer is positioned between the transistor layer and the light-emitting structure, then the color rendering index is improved, but the device structure becomes more complex
Solution Approach 1:
The light-converting layer serves multiple functions: it converts wavelengths to improve color rendering, acts as a structural element in the device architecture, and can be integrated with existing transistor and light-emitting layers. This multi-functionality justifies the added structural complexity by delivering multiple benefits from a single component.
3Reliability
If red light-emitting particles are doped into the light-converting layer, then the color rendering index is enhanced, but the manufacturing precision requirements increase
Solution Approach 1:
The doping concentration of red light-emitting particles in the light-converting layer is optimized within a specific range (5%-35%). This parameter change allows sufficient red light emission for improved color rendering while avoiding excessive doping that would cause aggregation or reduced conversion efficiency, thereby balancing manufacturing feasibility with performance.
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 display panel achieves improved color rendering index and performance by effectively converting lights into red light, enabling better color reproduction and stability through the use of a light-converting layer and protective layers.
Implementation Method 1
the light-converting layer is configured to convert other lights into red light
Data Source
AI summary
Embodiments of the present application disclose a display panel. The display panel comprises an array substrate and a light-emitting structure; the array substrate comprises a light conversion layer, and the light conversion layer is configured to convert other light into red light; the light-emitting structure is disposed on the array substrate, and the light-emitting structure emits white light.