Pentile OLED Pixel Layout for Edge Color-Line Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The Pentile matrix color pixel arrangement in OLED displays results in reduced sub-pixel count and high aperture ratio, leading to issues like green and red colors being perceived as lines at the edges, which degrades image quality and resolution.
Innovation Solution
A pixel arrangement structure with red and blue sub-pixels in one column and green sub-pixels in an adjacent column, combined with a data processor that adjusts grayscale values for sub-pixels at the edges to prevent color lines by reducing grayscale values in specific patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If sub-pixels are linearly arranged, then the aperture ratio is reduced and image resolution is degraded, but the structure is simple and easy to manufacture
Solution Approach 1:
The patent transitions from linear arrangement (1D) to diagonal arrangement (2D) of sub-pixels. Specifically, red and blue sub-pixels are arranged diagonally in alternating columns while green sub-pixels are arranged in adjacent columns, creating a Pentile matrix pattern that increases aperture ratio and image resolution without significantly increasing manufacturing complexity
Solution Approach 2:
The patent divides the display into pixel regions with specific sub-pixel configurations. Each pixel region contains red, blue, and green sub-pixels arranged in a diagonal pattern, creating modular segments that can be independently controlled and optimized for manufacturing
2Manufacturing precision
If Pentile matrix color pixel arrangement is used, then aperture ratio is improved and image resolution is enhanced, but color lines (greenish and pinkish) appear at edges degrading image quality
Solution Approach 1:
The patent applies different grayscale values to sub-pixels at different locations. Specifically, sub-pixels at the edges of the display panel are assigned different grayscale values compared to central sub-pixels, creating local quality variations that compensate for the diagonal arrangement and eliminate color lines at the edges
Solution Approach 2:
The patent dynamically adjusts grayscale values as a parameter to compensate for the Pentile arrangement. The data processor modifies the grayscale values of sub-pixels based on their positions, particularly reducing the grayscale values of sub-pixels at edges to prevent color line artifacts
Data Source
Figure 1~2B
Figure 2C~3B
Figure 3C~3D
AI summary
An organic light emitting display device and a driving method thereof are disclosed. The display device has sub-pixels of multiple colors. In one aspect, the organic light emitting display device detects sub-pixels which are positioned at the edges of the panel. Data for the sub-pixels on the edges are reduced so that colors on the edges are less observable.