Groove Pixel Defining Layer Display Panel for Dynamic Bending
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Solution Overview
Problem
Display panels face challenges in dynamic bending due to the thickness and brittleness of polarizers, which also lead to significant light loss, increasing the burden on OLED display panels' lifespan.
Innovation Solution
A display panel design featuring a pixel defining layer with a groove containing a light-emitting layer, an encapsulation layer that covers the light-emitting layer, and a color filter functional layer disposed within the encapsulation layer, replacing the polarizer to reduce thickness and enhance light extraction, facilitating bending and improving light extraction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a polarizer is used to reduce reflectivity, then reflectivity is reduced, but light extraction efficiency decreases significantly (loss of up to 58% of light)
Solution Approach 1:
The invention removes the polarizer component from the display panel structure entirely. By extracting this harmful element, the solution eliminates the trade-off between reflectivity reduction and light extraction efficiency, achieving both low reflectivity and high light extraction simultaneously through the groove-based light management approach
Solution Approach 2:
The invention segments the pixel defining layer by introducing grooves that divide the structure into distinct regions. This segmentation creates controlled light extraction paths and manages reflectivity without requiring a polarizer, thereby maintaining high light extraction efficiency while controlling harmful reflections
2Object-affected harmful factors
If a polarizer is used to reduce reflectivity, then reflectivity is reduced, but the panel thickness increases and brittleness increases, making dynamic bending difficult
Solution Approach 1:
By removing the polarizer from the structure, the invention eliminates the source of thickness and brittleness that prevented dynamic bending. The groove-based approach achieves reflectivity control without adding bulky or fragile components, enabling flexible and bendable display applications
Solution Approach 2:
The invention employs thin-film structures and groove-based light management that are inherently more flexible than polarizer layers. This approach allows the display panel to achieve dynamic bending capabilities while maintaining optical performance through carefully designed thin-film encapsulation and groove geometries
3Object-affected harmful factors
If a polarizer is used to reduce reflectivity, then reflectivity is reduced, but light extraction efficiency decreases, increasing the burden on OLED lifespan
Solution Approach 1:
By extracting the polarizer from the system, the invention eliminates the 58% light loss that previously burdened the OLED lifespan. The groove-based light extraction approach maximizes light utilization efficiency, reducing the operational stress on OLED materials and extending display panel durability
Solution Approach 2:
The segmented groove structure creates optimized light extraction pathways that minimize energy loss. This segmentation approach ensures that light is efficiently directed out of the panel without requiring a polarizer, thereby reducing the energy burden on OLED components and extending their operational lifespan
Data Source
AI summary
The present application provides a display panel and a manufacturing method thereof. The display panel includes a pixel defining layer, a light-emitting layer, an encapsulation layer, and a color filter functional layer. The pixel defining layer is provided with a first surface and a second surface opposite to each other, and a groove. The light-emitting layer is disposed in the groove. The encapsulation layer is disposed on the first surface of the pixel defining layer and extends to cover the light-emitting layer. The color filter functional layer is disposed in the encapsulation layer and corresponds to the groove.