OLED Display Panel Filter Layer for Reflection Reduction
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Solution Overview
Problem
OLED display panels face challenges with thickness and flexibility due to the need for a circular polarizer to reduce reflection, which increases thickness and reduces bendability.
Innovation Solution
A display panel design featuring a filter layer with filters allowing specific colors to pass through, reducing reflection intensity without the need for a circular polarizer, and including a color defining structure and encapsulating film layer to enhance flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a circular polarizer is added to reduce reflection, then the display effect is improved, but the thickness increases and flexibility deteriorates
Solution Approach 1:
The patent extracts and removes the circular polarizer from the OLED structure, replacing it with a filter layer that achieves reflection reduction without the thickness and flexibility penalties of a circular polarizer
Solution Approach 2:
The patent changes the optical parameters by introducing a filter layer with specific transmission characteristics that can reduce reflection while maintaining thin profile and flexibility, rather than using the traditional circular polarizer approach
2Object-affected harmful factors
If a circular polarizer is added to reduce reflection, then the display effect is improved, but the bendability deteriorates
Solution Approach 1:
The patent extracts and removes the circular polarizer from the OLED structure, replacing it with a filter layer that achieves reflection reduction without the thickness and flexibility penalties of a circular polarizer
Solution Approach 2:
The patent uses a thin filter layer instead of a bulky circular polarizer, enabling the display to maintain flexibility and bendability while still achieving the desired optical performance
3Illumination intensity
If metal layers are added to OLED, then the brightness and color are improved, but the reflection of ambient light increases
Solution Approach 1:
The patent introduces a filter layer as an intermediary between the metal layers and the external environment, which allows the metal layers to provide brightness while the filter layer controls the reflection of ambient light
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 thins the display panel, allowing for easier bending and folding while maintaining effective light filtering, thus addressing the limitations of traditional OLED designs.
Implementation Method 1
A filter layer, disposed on a light emitting side of the EL display unit, is provided with a plurality of filters allowing lights of different colors to pass through
Implementation Method 2
a color defining structure is provided between the adjacent filters, where the color defining structure is used for defining adjacent two filters
Data Source
AI summary
A display panel and a display device are provided, the display panel include a substrate, an EL display unit group and a filter layer. The EL display unit group is disposed on one side of the substrate, the EL display units includes a plurality of EL display units for emitting light of different colors; the filter layer is disposed on a light emitting side of the EL display unit, the filter layer includes a plurality of filters allowing lights of different colors to pass through, a light emitted from the EL display unit has a color same as a color of a light allowed to pass through the filter disposed on the light emitting side of the EL display unit.