Organic Light Emitting Display Device Sub-Pixel Arrangement
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Solution Overview
Problem
Organic light emitting display devices face issues with color shift and artifacts due to regular alignment of sub-pixels, leading to irregular brightness and image quality problems.
Innovation Solution
The device connects green sub-pixels to different data lines and alternates their placement along scan lines in a zig-zag pattern, generating parasitic capacitance to create non-uniform brightness and reduce color shift and artifacts by ensuring sub-pixels are not aligned linearly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If green sub-pixels are connected to the same data line and disposed regularly, then manufacturing is simplified, but brightness non-uniformity and image quality deteriorate
Solution Approach 1:
The patent divides green sub-pixels into different groups connected to different data lines. Specifically, green sub-pixels are alternately connected to first and second data lines, creating distinct segments that are driven independently. This segmentation allows for better control of brightness uniformity across the display while maintaining manufacturing simplicity.
Solution Approach 2:
The patent applies different connection patterns to different regions of green sub-pixels. By alternating connections between adjacent data lines for green sub-pixels, the invention creates local variations in electrical characteristics that compensate for brightness non-uniformity. This local quality approach ensures each region is optimized for its specific position, improving overall image quality.
2Device complexity
If sub-pixels are disposed regularly in linear alignment, then device structure is simplified, but color shift and artifacts increase
Solution Approach 1:
The patent introduces asymmetric displacement of green sub-pixels relative to the linear alignment of red and blue sub-pixels. The green sub-pixels are shifted in alternating patterns, creating an asymmetric arrangement that disrupts the regular lattice structure. This asymmetry eliminates the conditions that cause color shift and artifacts while maintaining overall structural simplicity.
Solution Approach 2:
The patent adds a dimensional variation to the sub-pixel arrangement by displacing green sub-pixels perpendicular to the data line direction. This creates a zig-zag or staggered pattern that introduces a new spatial dimension to the otherwise linear arrangement. The dimensional change breaks the regularity that causes visual artifacts while preserving the fundamental grid structure.
3Manufacturing precision
If green sub-pixels are connected to adjacent data lines with different voltages, then brightness uniformity is improved, but device complexity increases
Solution Approach 1:
The patent merges the control of multiple green sub-pixel groups into a regular alternating pattern connected to adjacent data lines. By establishing a systematic alternation between first and second data lines for green sub-pixels, the invention combines what could be a complex irregular pattern into a simple repeating sequence. This merging approach maintains brightness uniformity while reducing the overall complexity of the connection pattern.
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
This configuration improves image quality by compensating for brightness non-uniformity and reducing color shift and artifacts, resulting in a more irregular and thus improved sub-pixel arrangement.
Implementation Method 1
generating parasitic capacitance to create non-uniform brightness and reduce color shift and artifacts
Data Source
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AI summary
An organic light emitting display device includes a plurality of data lines, a plurality of scan lines disposed intersecting with the plurality of data lines, and a plurality of sub-pixels each connected to at least one of the plurality of data lines and at least one of the plurality of scan lines. The plurality of sub-pixels includes at least a red sub-pixel, a plurality of green sub-pixels, and a blue sub-pixel. In an embodiment, a green sub-pixel and a blue sub-pixel are connected to a data line and another green sub-pixel and a red sub-pixel are connected to an adjacent data line. Thus, the sub-pixels can be seen as being disposed irregularly, so that an artifact of a displayed image can be reduced.