Sub-Pixel Data Line Layout for Vertical Crosstalk Cancellation
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Solution Overview
Problem
Ultra-narrow border liquid crystal displays face issues with vertical crosstalk due to parasitic capacitance between data lines and sub-pixels, leading to display failures and increased production costs from the need for additional data lines and chips on film.
Innovation Solution
The display panel design includes a sub-pixel structure with a first and second data line that are insulated and opposite in signal, extending from a non-display area into the display area, with a shared trunk and branches that are bilaterally symmetrical, reducing parasitic coupling and the number of data lines required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two data lines are disposed in the display area of each sub-pixel with opposite signals, then vertical crosstalk is reduced, but the number of chips on film increases and production cost increases
Solution Approach 1:
The patent merges the data line structures of adjacent sub-pixels by sharing a common data line. Specifically, the first data line of the first sub-pixel and the second data line of the second sub-pixel are merged into a single shared data line, reducing the total number of data lines from four to three per sub-pixel pair while maintaining the opposite signal configuration that reduces vertical crosstalk
Solution Approach 2:
The shared data line serves multiple functions: it acts as the second data line for the first sub-pixel and simultaneously as the first data line for the second sub-pixel. This multi-functional design reduces the number of chips on film needed while maintaining the crosstalk reduction effect through opposite signal configuration
2Reliability
If data lines are positioned symmetrically in the display area, then vertical crosstalk is reduced, but the border width increases
Solution Approach 1:
The patent employs asymmetric positioning of data lines relative to sub-pixel boundaries. The first data line is positioned closer to the first sub-pixel than the second data line is to the second sub-pixel, creating an asymmetric configuration that maintains effective crosstalk cancellation while optimizing the use of display area and reducing border requirements
3Device complexity
If data lines extend from non-display area through display area, then wiring complexity is reduced, but parasitic capacitance increases
Solution Approach 1:
The patent extracts the trunk portion of the data line and positions it in the non-display area, separating it from the display area where sub-pixels are located. This extraction reduces the overlapping area between data lines and sub-pixels in the display region, thereby reducing parasitic capacitance while maintaining wiring simplicity through the shared trunk structure
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 effectively offsets coupling voltages between data lines, reducing vertical crosstalk and minimizing the number of chips on film, thereby improving display performance and lowering production costs.
Implementation Method 1
due to a parasitic capacitance between a data line and a sub-pixel, a change of a data line signal will interfere with a sub-pixel signal
Implementation Method 2
one of them has a positive coupling voltage, and another one of them has a negative coupling voltage, which thus can be offset by each other
Data Source
AI summary
The present invention provides a display panel. By changing a wiring mode of data lines of a sub-pixel, a non-display area of a first sub-pixel is provided with a data line branched in the display area, and a display area of the first sub-pixel is further provided with a second data line, such that by setting opposite signals of the first data line and the second data line, the coupling voltages of the two data line signals to the sub-pixels can be offset by each other, and the problem of vertical crosstalk of an ultra-narrow border display is improved.