AMOLED Sub-Pixel Layout for Luminance Uniformity and Pixel Density
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display technologies face challenges in improving display effects while maintaining high pixel density and aperture ratio in active matrix organic light-emitting diode (AMOLED) display devices.
Innovation Solution
The display panel is designed with sub-pixels arranged in alternating first and second pixel columns, where geometric centers of light-emitting regions of sub-pixels in each column are positioned on straight lines intersecting in a staggered manner, and the areas of light-emitting regions are varied to enhance luminance uniformity and pixel density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If sub-pixels are arranged in conventional pixel columns with geometric centers on parallel lines, then manufacturing is simplified, but luminance uniformity deteriorates
Solution Approach 1:
The patent applies asymmetry by positioning geometric centers of light-emitting regions of sub-pixels in the same pixel group on two straight lines extending in the first direction, rather than on parallel lines. This asymmetric arrangement causes light-emitting regions to be offset in the second direction, achieving uniform distribution of emitted light and improving luminance uniformity while maintaining manufacturing simplicity.
2Quantity of substance
If light-emitting regions have equal areas, then pixel density is maximized, but luminance uniformity deteriorates
Solution Approach 1:
The patent applies local quality by varying the areas of light-emitting regions of different sub-pixels within the same pixel group. Specifically, light-emitting regions of sub-pixels emitting the same color are configured with different areas, while maintaining overall high pixel density. This local variation compensates for differences in light emission intensity, improving luminance uniformity without sacrificing pixel density.
3Illumination intensity
If sub-pixels are arranged to maximize aperture ratio, then display quality improves, but service life of light-emitting layer deteriorates
Solution Approach 1:
The patent applies parameter changes by adjusting the area parameter of light-emitting regions. Light-emitting regions of sub-pixels emitting the same color are configured with different areas, which changes the emission parameters to achieve uniform luminance distribution. This parameter adjustment extends the service life of the light-emitting layer by preventing localized overheating and material degradation, while maintaining high aperture ratio.
Data Source
AI summary
A display panel includes a substrate and a plurality of sub-pixels each having a light-emitting region. The plurality of sub-pixels are divided into a plurality of first pixel columns and a plurality of second pixel columns that all extend in a first direction and are disposed alternately in a second direction. A first pixel column includes first pixel groups and third pixel groups that are disposed alternately in the first direction, a first pixel group includes two first sub-pixels disposed in the first direction, and a third pixel group includes two third sub-pixels disposed in the first direction. A second pixel column includes second pixel groups disposed sequentially in the first direction, a second pixel group includes two second sub-pixels disposed in the first direction, and geometric centers of light-emitting regions of the two second sub-pixels are located on two straight lines extending in the first direction.