Scan Driver Line Overlap for Capacitance Deviation Reduction
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Solution Overview
Problem
Display devices experience visual deviations due to capacitance deviations between pixel rows, leading to line stains and other defects.
Innovation Solution
The display device incorporates a specific configuration of scan and sensing lines, connection lines, and transistors that cross and overlap each other, forming capacitors between pixel rows to minimize capacitance deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If scan lines and sensing lines are connected to pixels in a conventional configuration, then the display device can function normally, but capacitance deviation between pixel rows occurs causing visual defects
Solution Approach 1:
The patent applies equipotentiality by configuring scan connection lines and sensing connection lines to cross and overlap in a specific pattern, creating capacitive coupling that equalizes the potential across different pixel rows. This reduces capacitance deviation between rows by establishing a more uniform electrical environment, thereby improving image quality and eliminating visual defects like line stains.
Solution Approach 2:
The patent introduces the overlapping connection lines as an intermediary element between scan lines and sensing lines. These overlapping portions act as capacitive mediators that transfer and balance electrical potential between adjacent pixel rows, reducing the harmful capacitance deviation without requiring direct modification of the pixel structures themselves.
2Manufacturing precision
If scan connection lines and sensing connection lines are arranged to cross and overlap, then capacitance deviation is reduced, but device structure becomes more complex
Solution Approach 1:
The patent merges the functions of scan connection lines and sensing connection lines by arranging them to cross and overlap in the same spatial region. This combined configuration serves dual purposes: maintaining the individual functions of scan and sensing lines while simultaneously creating capacitive coupling to reduce capacitance deviation, thereby improving uniformity without adding separate compensation structures.
Solution Approach 2:
The patent utilizes the vertical stacking dimension by having scan connection lines and sensing connection lines overlap in the vertical direction rather than only extending horizontally. This dimensional approach allows the lines to occupy the same planar space at different vertical levels, creating capacitive coupling without increasing the horizontal footprint or requiring additional lateral routing complexity.
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 reduces or eliminates capacitance deviations between pixel rows, preventing horizontal line defects and improving image quality.
Implementation Method 1
the first scan connection line crosses and overlaps the first sensing connection line... a capacitance deviation between a first pixel row in which the first pixel is disposed and a second pixel row in which the second pixel is disposed may decrease
Data Source
AI summary
A display device may include a first scan connection line connecting a first scan line connected to a first pixel and a first scan output transistor, a first sensing connection line connecting a first sensing line connected to the first pixel and a first sensing output transistor, the first sensing connection line crossing and overlapping the first scan connection line, a second sensing connection line connecting a second sensing line connected to a second pixel adjacent to the first pixel in a first direction and a second sensing output transistor, and a second scan connection line connecting a second scan line connected to the second pixel and a second scan output transistor, the second scan connection line crossing and overlapping the second sensing connection line.