Multi-Layer Data Line Structure for Display Device Noise Reduction
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Solution Overview
Problem
Existing organic light emitting display devices face challenges in achieving high display quality due to issues with data signal transmission and voltage coupling noise between adjacent data lines, which affect image clarity and overall performance.
Innovation Solution
The display device incorporates a unique configuration where data lines are arranged on different layers and connected through demultiplexers to ensure simultaneous data signal input to adjacent data lines, reducing coupling noise and enhancing image quality by maintaining the on-state of transistors during the same periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If data lines are arranged on the same layer, then device complexity is reduced, but coupling noise between adjacent data lines increases
Solution Approach 1:
The patent applies dimensionality change by transitioning data lines from a two-dimensional planar arrangement (same layer) to a three-dimensional stacked arrangement (different layers). This vertical separation in the Z-dimension effectively reduces coupling noise between adjacent data lines while maintaining a compact overall structure, thus resolving the contradiction between device complexity and noise reduction.
2Object-generated harmful factors
If data lines are provided on different layers, then coupling noise is reduced, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent applies segmentation by dividing the data line structure into multiple independent segments on different layers. Each data line is formed as a separate conductive layer with its own pattern definition and connection structure, allowing independent optimization and fabrication processes for each layer, thus making the complex multi-layer structure manufacturable.
Solution Approach 2:
The patent introduces intermediary elements such as contact holes and connection conductors that mediate between different data line layers. These intermediaries enable electrical connection between layers while maintaining physical separation, thus reducing coupling noise while ensuring proper signal transmission and power distribution across the multi-layer structure.
3Object-generated harmful factors
If data lines are arranged alternately connected to first and second sub-data lines, then coupling noise is reduced, but transistor operation uniformity may be affected
Solution Approach 1:
The patent applies periodic action by implementing an alternating connection pattern where pixels are systematically connected to either the first or second sub-data line in a regular periodic sequence. This periodic arrangement ensures that adjacent pixels experience similar electrical conditions and timing characteristics, maintaining operation uniformity while the multi-layer structure reduces coupling noise.
Data Source
AI summary
A display device includes: pixel columns including pixels arranged along a first direction; pixel rows including pixels arranged along a second direction crossing the first direction; data lines connected to respective pixel columns, each of the data lines including a first sub-data line provided at one side of a corresponding pixel column and a second sub-data line provided at another side of the corresponding pixel column; scan lines extending along the second direction and connected to respective pixel rows; and a power line to supply driving power to the pixels, one of the pixels of the pixel columns is connected to the first sub-data line, and a pixel adjacent to the pixel connected to the first sub-data line is connected to the second sub-data line, and the first sub-data line and the second sub-data line in the same pixel column are on different layers from each other.