Display Panel Filter Layer for Reflection Reduction
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Solution Overview
Problem
Flexible OLED display devices have thicker thickness, higher elastic modulus, and stronger brittleness, which hinders their flexibility and bending performance due to the use of a circular polarizer for reducing reflection.
Innovation Solution
A display panel design featuring a substrate layer, light emitting layer, package layer, filter layer with a stacked structure of color resistors, and a touch layer, which eliminates the need for a circular polarizer by using a filter layer with color resistors to reduce reflection, thereby thinning the device and enhancing flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a circular polarizer is used to reduce reflection, then the reflection of ambient light is reduced, but the thickness of the display device increases and the elastic modulus becomes larger
Solution Approach 1:
The patent removes the circular polarizer from the display structure entirely. Instead of using a circular polarizer to reduce reflection, the invention employs a linear polarizer in combination with a reflection compensation layer that has specific optical properties. This extraction of the circular polarizer directly reduces the overall thickness while maintaining the anti-reflection function through alternative optical mechanisms.
Solution Approach 2:
The patent changes the optical parameters of the reflection compensation layer, specifically its refractive index and optical path difference, to achieve the desired anti-reflection effect. By controlling the refractive index of the reflection compensation layer to be between 1.3 and 1.7 and adjusting the optical path difference to specific values (40-200nm for S-polarized light, 100-300nm for P-polarized light), the system achieves reduced reflection without requiring the thick circular polarizer structure.
2Object-affected harmful factors
If a circular polarizer is used to reduce reflection, then the reflection of ambient light is reduced, but the elastic modulus becomes larger and brittleness increases
Solution Approach 1:
The patent removes the circular polarizer from the display structure entirely. Instead of using a circular polarizer to reduce reflection, the invention employs a linear polarizer in combination with a reflection compensation layer that has specific optical properties. This extraction of the circular polarizer directly reduces the overall thickness while maintaining the anti-reflection function through alternative optical mechanisms.
Solution Approach 2:
The patent employs thin film structures for the linear polarizer and reflection compensation layer that maintain flexibility. The reflection compensation layer is designed as a thin film with specific optical properties rather than a thick rigid structure, allowing the display device to maintain flexibility and bendability while achieving the desired anti-reflection effect.
3Object-affected harmful factors
If a circular polarizer is used to reduce reflection, then the reflection of ambient light is reduced, but the bending and folding performance deteriorates
Solution Approach 1:
The patent removes the circular polarizer from the display structure entirely. Instead of using a circular polarizer to reduce reflection, the invention employs a linear polarizer in combination with a reflection compensation layer that has specific optical properties. This extraction of the circular polarizer directly reduces the overall thickness while maintaining the anti-reflection function through alternative optical mechanisms.
Solution Approach 2:
The patent employs thin film structures for the linear polarizer and reflection compensation layer that maintain flexibility. The reflection compensation layer is designed as a thin film with specific optical properties rather than a thick rigid structure, allowing the display device to maintain flexibility and bendability while achieving the desired anti-reflection effect.
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 reduces the thickness of the display panel, improves its bendability, and enables folding functionality by shielding external light reflection without the need for a circular polarizer, thus addressing the brittleness and thickness issues.
Implementation Method 1
the filter layer includes a first filter area and a second filter area, which are alternately arranged; the second filter area includes a first color resistor, a second color resistor and a third color resistor, which are stacked to form a layer stacked structure
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a substrate layer, a light emitting layer, a package layer, a filter layer and an organic flat layer. The organic flat layer covers the filter layer. The light emitting layer further includes a pixel area and a pixel interval area. The filter layer further includes an R/G/B filter area and a layer stacked area. The layer stacked area is a stacked structure of R/G/B three-layer filter layers. The layer stacked structure can thin the thickness of the display panel and improve the flexibility of the display panel.