Display Panel Alternating Scan Lines Reduce Coupling
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Solution Overview
Problem
Display panels experience gray scale variation and poor image performance due to the coupling effect of horizontal and vertical scan lines, affecting pixel voltages of sub-pixels.
Innovation Solution
A display panel design featuring alternating first and second scan lines, data lines, and auxiliary lines, with conductive vias and staggered auxiliary lines to reduce impedance and coupling effects, ensuring synchronous signal reception and improved image uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If vertical auxiliary lines are used to connect horizontal scan lines to input scan signals and data signals from the same side, then the display panel can meet requirements for various shapes, but pixel voltages of some sub-pixels are affected by coupling effects resulting in gray scale variation and poor image performance
Solution Approach 1:
The scan lines are divided into two separate sets: first scan lines (GL1) and second scan lines (GL2), which are arranged alternately. This segmentation allows different scan lines to be driven independently, reducing the coupling effect between scan lines and auxiliary lines that causes gray scale variation in sub-pixels.
Solution Approach 2:
The first auxiliary lines (AL1) are designed with a specific structure where the second portion is spaced apart from the first portion and electrically insulated, creating different electrical characteristics in different regions. This local differentiation helps reduce the coupling effect on specific sub-pixels while maintaining the overall connectivity function.
2Reliability
If alternating first and second scan lines and data lines are used, then coupling effects are reduced, but the device complexity increases
Solution Approach 1:
The first auxiliary lines (AL1) and second auxiliary lines (AL2) are integrated into the same conductive layer as the scan lines and data lines, respectively. This merging reduces the total number of manufacturing layers and processes, offsetting the increased complexity from having alternating scan lines while maintaining the benefit of reduced coupling effects.
Solution Approach 2:
The auxiliary lines serve multiple functions: they provide electrical connection for scan signals, act as signal transmission paths, and their spaced-apart structure inherently reduces coupling effects. This multi-functionality reduces the need for additional separate components, thereby managing device complexity.
3Reliability
If the second portion of auxiliary lines is spaced apart and electrically insulated, then coupling effects are mitigated, but manufacturing precision requirements increase
Solution Approach 1:
The spaced-apart second portions of the auxiliary lines act as intermediary insulating regions between different electrical paths. By creating this physical gap, the design uses space itself as a mediator to reduce electrical coupling, which is more effective than adding complex insulating materials or structures.
Solution Approach 2:
The first auxiliary lines are electrically connected to both the first scan lines and second scan lines (through the spaced-apart structure), creating an equipotential path that reduces voltage differences and minimizes coupling effects. This equipotential design reduces the sensitivity to spacing precision variations.
Data Source
AI summary
A display panel including sub pixels, a plurality of first and second scan lines, a plurality of first and second data lines, a plurality of first and second auxiliary lines and first conductive vias is provided. The sub pixels are arranged into first rows arranged in a first direction and second rows arranged in a second direction. The second rows are electrically connected to the first and second scan lines in alternation and are electrically connected to the first and second data lines in alternation. Each first auxiliary line includes a first portion electrically connected to a corresponding first scan line and a second portion spaced away from the first portion. The second auxiliary lines are respectively located between two adjacent first rows. Each second scan line is electrically connected to a corresponding first scan line through at least one second auxiliary line.