Organic Light Emitting Display Pixel Structure for High Density Integration
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Solution Overview
Problem
Current organic light emitting display devices face limitations in achieving ultra-high density pixel integration due to the rectangular sub-pixel structure, which restricts the aperture ratio and brightness, making it challenging to implement high-resolution displays beyond several hundred ppi.
Innovation Solution
The proposed solution involves an organic light emitting display device with a pixel structure where blue sub-pixels are aligned on the same line, and red and green sub-pixels are disposed between columns formed by blue sub-pixels, with blue sub-pixels having a quadrangular shape and red and green sub-pixels having a triangular shape, allowing for increased integration density and aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a rectangular sub-pixel structure is used, then the manufacturing process is simple, but the pixel integration degree cannot exceed several hundred ppi level
Solution Approach 1:
The patent applies asymmetry by using different geometric shapes for different sub-pixel types: blue sub-pixels are quadrangular while red and green sub-pixels are triangular. This asymmetric arrangement allows for optimized spatial packing that achieves ultra-high density pixel integration exceeding several hundred ppi, while maintaining a systematic structure that can be manufactured with existing processes
Solution Approach 2:
The patent transitions from traditional linear arrangement to a two-dimensional optimized layout where blue sub-pixels form columns and red/green sub-pixels are positioned in the spaces between columns. This dimensional reorganization maximizes the use of available space, enabling pixel integration densities beyond conventional rectangular arrangements
2Area of stationary object
If rectangular sub-pixels are used, then the structure is simple, but the aperture ratio is limited
Solution Approach 1:
The patent applies local quality by optimizing the shape and position of each sub-pixel type according to its specific function and location. Blue sub-pixels are positioned at column positions with quadrangular shapes, while red and green sub-pixels are placed in between with triangular shapes. This localized optimization of geometry and arrangement maximizes the overall aperture ratio by reducing wasted space while maintaining manufacturability
3Measurement precision
If rectangular sub-pixel structure is used, then the device is easy to manufacture, but the resolution cannot achieve thousand ppi level
Solution Approach 1:
The patent applies segmentation by dividing the pixel array into distinct column structures where blue sub-pixels form vertical columns and red/green sub-pixels are segmented and positioned in the inter-column spaces. This segmented approach enables precise control over pixel placement at ultra-high densities (thousand ppi level) while using standardized manufacturing techniques for each segment type
Data Source
AI summary
Disclosed is an organic light emitting display device including a plurality of unit pixels. The unit pixels includes one or more red sub-pixels, one or more green sub-pixels, and one or more blue sub-pixels, the blue sub-pixels included in adjacent pixels in a first direction are located on the same line, two columns of the red sub-pixels and the green sub-pixels are disposed between columns formed by the blue sub-pixels in the first direction, the blue sub-pixels have a quadrangular shape and one of diagonal lines of the quadrangle shape is disposed to be parallel to the first direction, and the red sub-pixels and the green sub-pixels have a triangular shape and are disposed to be spaced apart from two adjacent sides of the quadrangular shape by a predetermined distance.