Pixel Array Substrate Auxiliary Line Shielding
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Solution Overview
Problem
In pixel array substrates, the coupling effect between gate and data signals causes grey scale or brightness variations in sub-pixels due to the connection of horizontal scan lines with vertical auxiliary lines, leading to poor image performance.
Innovation Solution
A pixel array substrate design that includes a first auxiliary line between two scan lines and a second auxiliary line electrically connected to the first auxiliary line, where the auxiliary lines belong to different conductive layers, reducing capacitive coupling by terminating the gate signal at a scan line and using a second portion of the second auxiliary line to shield the first auxiliary line, thereby minimizing the influence on adjacent sub-pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If scan lines are connected to auxiliary lines for gate driving circuit arrangement, then circuit integration is improved, but capacitive coupling causes grey scale variation in sub-pixels
Solution Approach 1:
The auxiliary line is segmented into multiple sections with different connection configurations. The first auxiliary line connects to one scan line while the second auxiliary line connects to another scan line, creating separate control zones that prevent coupled interference from affecting all sub-pixels uniformly.
Solution Approach 2:
Different regions of the auxiliary line are designed with different connection characteristics. The first auxiliary line has a first end connected to a first scan line and a second end connected to a second scan line, while the second auxiliary line has opposite connectivity. This local differentiation allows targeted control of capacitive effects in different sub-pixel regions.
2Speed
If auxiliary lines are used to connect scan lines, then gate signal transmission is improved, but capacitive interference affects adjacent sub-pixels
Solution Approach 1:
The auxiliary line structure converts the potentially harmful capacitive coupling effect into a beneficial dual-scan-line control mechanism. By connecting different ends of auxiliary lines to different scan lines, the capacitive effect is used to enable independent control of sub-pixel groups, transforming interference into a functional feature for improved signal management.
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 design effectively mitigates the grey scale or brightness variations in sub-pixels adjacent to the auxiliary lines, improving image performance by reducing capacitive coupling effects during signal transmission.
Implementation Method 1
The second auxiliary line is electrically connected to the first auxiliary line at the second end through a conductive via
Data Source
AI summary
A pixel array substrate includes a substrate, a plurality of data lines, a plurality of scan lines, a plurality of sub-pixels, and a first and a second auxiliary lines. The plurality of sub-pixels are arranged into first rows arranged in a first direction and second rows arranged in a second direction. The first auxiliary line and the plurality of scan lines belong to a first conductive layer. The second auxiliary line and the plurality of data lines belong to a second conductive layer. The first auxiliary line is located between two scan lines. A first end of the first auxiliary line is connected to one of the two scan lines. A second end of the first auxiliary line is separated from the other one of the two scan lines. The second auxiliary line is electrically connected to the first auxiliary line at the second end through a conductive via.