Display Panel Connection Layout for Dual Data Line Crosstalk
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Solution Overview
Problem
High refresh rates in display panels lead to shortened threshold compensation time for pixel circuits, causing crosstalk between data lines and other signal lines, resulting in poor display issues due to increased coupling capacitance and signal interference.
Innovation Solution
A dual data line design is implemented, where pixel circuits in a pixel column are connected to different data lines, with connection portions positioned to avoid overlapping with signal lines, reducing coupling capacitance and crosstalk by ensuring non-overlapping orthographic projections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a dual data line driving method is adopted to increase threshold compensation time, then the threshold compensation time is extended, but crosstalk between data lines and other signal lines becomes more serious
Solution Approach 1:
The patent resolves the crosstalk issue by transitioning from a two-dimensional planar layout to a three-dimensional spatial arrangement. Specifically, the connection portions of the first and second data lines are positioned at different heights (different layers) above the substrate, allowing them to extend along the second direction without overlapping with signal lines that extend along the first direction. This vertical separation in the third dimension effectively reduces coupling capacitance and crosstalk while maintaining the dual data line configuration needed for extended threshold compensation time.
Solution Approach 2:
The patent divides the data line connection structure into distinct segments: connection portions for the first data line and connection portions for the second data line. These segmented connection portions are positioned at different locations and heights, allowing independent optimization of each connection's position to avoid signal line interference. This segmentation enables the dual data line system to achieve both extended compensation time and reduced crosstalk.
2Duration of action of moving object
If multiple pixel circuits in a same pixel column are electrically connected to different data lines, then threshold compensation time is increased, but coupling capacitance between data lines and signal lines increases
Solution Approach 1:
The patent reduces coupling capacitance by utilizing the third dimension (height/layer) to separate data line connection portions from signal lines. The connection portions are positioned at different heights above the substrate, creating vertical separation that minimizes electromagnetic coupling. This spatial arrangement allows multiple pixel circuits to be connected to different data lines for extended compensation time while minimizing energy loss through reduced coupling capacitance.
3Adaptability or versatility
If connection portions of data lines are positioned to overlap with signal lines, then routing flexibility is improved, but signal interference and crosstalk increase
Solution Approach 1:
The patent achieves routing flexibility without signal interference by utilizing vertical separation in the third dimension. The connection portions of data lines are positioned at different heights, allowing them to pass over or under signal lines without overlapping in the planar view. This three-dimensional routing approach maintains the adaptability needed for flexible circuit design while eliminating the harmful effects of signal interference and crosstalk that would occur with planar overlapping.
Data Source
AI summary
A display panel includes: a substrate, pixel columns arranged along a first direction, a first data line and a second data line extending along the first direction, and signal lines extending along a second direction. One pixel column includes pixel circuits arranged along the second direction. In one pixel column, a portion of pixel circuits is electrically connected to the first data line and another portion is electrically connected to the second data line. A first connection portion is provided on a side of the first data line facing the second data line, and a second connection portion is provided on a side of the second data line facing the first data line. An orthographic projection of at least one of the first connection portion and the second connection portion on the substrate does not overlap orthographic projections of the signal lines.