Alternating Data Lines in OLED Display Modules
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Solution Overview
Problem
Organic light emitting display panels face issues with data line short-circuiting due to high temperature, high humidity, and voltage differences between adjacent data lines, affecting their reliability and performance.
Innovation Solution
The display module incorporates a matrix arrangement of pixels emitting different colors, with specific data lines and light emission control lines providing signals to corresponding pixels, ensuring alternating connections and minimizing voltage differences between data lines to prevent short-circuiting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data lines are extended from COF to panels to provide data signals, then data transmission capability is improved, but short-circuiting occurs due to high temperature, high humidity, and voltage difference between adjacent data lines
Solution Approach 1:
The patent segments the data line group into first data lines and second data lines, which are alternately arranged and connected to different pixel groups. This segmentation reduces the voltage difference between adjacent data lines by ensuring that lines carrying different voltage levels are not adjacent, thereby preventing short-circuiting while maintaining data transmission capability.
Solution Approach 2:
The patent implements equipotentiality by arranging data lines such that adjacent lines have similar voltage levels. Specifically, first data lines and second data lines are alternately disposed, with each type connected to pixels of the same type (first pixels or second pixels), ensuring that voltage differences between neighboring lines are minimized, thus preventing short-circuiting under high temperature and humidity conditions.
2Measurement precision
If light emission control lines are arranged to provide control signals to pixels, then pixel control precision is improved, but device complexity increases due to alternating arrangement of first and second light emission control lines
Solution Approach 1:
The patent merges the control of first pixels and second pixels into an alternating pattern of first light emission control lines and second light emission control lines. This merging approach allows for precise control of individual pixel types while maintaining a systematic and manageable line arrangement, where each control line type serves a specific pixel type in an alternating sequence.
Solution Approach 2:
The patent applies local quality by assigning specific control lines to specific pixel types: first light emission control lines control first pixels, while second light emission control lines control second pixels. This localized control approach ensures that each pixel type receives appropriate control signals tailored to its specific requirements, thereby improving control precision without excessive complexity.
3Illumination intensity
If pixels are arranged in matrix type with alternating first and second pixels, then display quality is improved through different color emissions, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs asymmetry in the pixel arrangement by creating distinct first pixels and second pixels with different color emission characteristics in an alternating matrix pattern. This asymmetric design allows for enhanced display quality through color differentiation while the systematic alternating pattern provides a clear manufacturing guideline, reducing the actual precision burden compared to fully symmetric high-density arrangements.
Solution Approach 2:
The patent segments the pixel matrix into first pixels and second pixels with different color emission properties, arranged in an alternating pattern. This segmentation allows for optimized manufacturing processes where each pixel type can be produced with slightly relaxed tolerances, as the alternating pattern provides natural spacing and reference points that reduce cumulative error accumulation during fabrication.
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 enhances the reliability and performance of organic light emitting display panels by reducing the likelihood of data line short-circuiting, ensuring stable signal transmission and maintaining image quality across varying environmental conditions.
Implementation Method 1
Each of the plurality of pixels PX includes an organic light emitting diode OLED and a pixel circuit CC connected thereto
Data Source
AI summary
A display module includes first to third pixels emitting different colors, first light emission control lines connected to the first pixels among the first to third pixels, and second light emission control lines connected to the second pixels among the first to third pixels. Each of the first light emission control lines and each of the second light emission control lines are alternately arranged.