Curved OLED Display Panel Optical Layer for Edge Brightness Uniformity
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Solution Overview
Problem
Curved OLED display panels experience reduced brightness and color accuracy at the edges due to smaller pixel projection areas, leading to poor visual perception and color casts as viewing angles increase.
Innovation Solution
A display panel design with a flat and curved region, featuring a display function layer and an optical function layer where the optical function layer is disposed on the side of light-emitting elements facing away from the base substrate, with differentiated light convergence capabilities in each region to enhance light extraction and uniformity across the display surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a curved surface is designed on the edge of the display panel, then the display panel achieves a curved screen design, but the projection area of pixels on the edge becomes smaller, resulting in reduced brightness and color accuracy
Solution Approach 1:
The patent applies different optical function layer configurations to different regions of the display panel. The first optical function layer is disposed only in the first subregion (curved edge region), while the second optical function layer is disposed in both the second subregion (flat central region) and the first subregion. This local differentiation compensates for the reduced pixel projection area at curved edges by enhancing light extraction efficiency specifically where needed, thereby maintaining uniform brightness and color accuracy across the entire display surface.
2Illumination intensity
If an optical function layer is added to improve light extraction, then brightness is improved, but device complexity increases
Solution Approach 1:
The patent divides the optical function layer into two separate layers: a first optical function layer disposed in the first subregion (curved edge region) and a second optical function layer disposed in the second subregion (flat central region) and extending into the first subregion. This segmentation allows each layer to be optimized for its specific region's requirements while maintaining overall system efficiency. The divided structure reduces complexity compared to a single uniform optical layer by enabling region-specific optimization without requiring a completely different design approach for each area.
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 increases brightness and uniformity in both flat and curved regions, reducing optical crosstalk and color casts, thereby improving visual perception and display performance.
Implementation Method 1
the optical function layer is disposed on a side of the multiple light-emitting elements facing away from the base substrate; where at least part of the optical function layer is disposed in the flat display region
Data Source
AI summary
Provided are a display panel and a display device. The display panel includes a flat display region and a curved display region. The display panel further includes: an optical function layer on a side of the multiple light-emitting elements facing away from the base substrate; where at least part of the optical function layer is disposed in the flat display region; brightness of the display panel in a unit area of the flat display region at a viewing angle of 0° is first brightness, and brightness of the display panel in a unit area of the curved display region at a viewing angle of 0° is second brightness; and at the same height distance from the display surface of the display panel, the first brightness of at least part of the display panel is greater than the second brightness.