Active Matrix Substrate Signal Line Intersections Outside Display Region
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Solution Overview
Problem
Conventional liquid crystal display devices with odd-shaped display regions suffer from brightness unevenness and line defects due to load non-uniformity among scan and data lines, which cannot be effectively corrected by adjusting signal voltage values.
Innovation Solution
An active matrix substrate with signal lines arranged to intersect outside the display region, allowing for capacitance generation and load correction without changing signal voltage values, thereby preventing brightness unevenness and line defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If scan lines and data lines are arranged to correspond to an odd-shaped display region with varying numbers of pixels per row/column, then the display region can have non-rectangular shapes (increasing design freedom), but load non-uniformity occurs among the signal lines causing brightness unevenness and line defects
Solution Approach 1:
The patent extends signal lines into a non-display region (spatial extension to another dimension/area) to create additional intersection points. This allows capacitance to be added to specific signal lines without occupying display area, thereby balancing loads across lines with different pixel counts while maintaining the odd-shaped display region.
Solution Approach 2:
The patent introduces a non-display region as an intermediary space that hosts additional intersection points between scan lines and data lines. This intermediary region serves as a buffer zone where capacitance can be adjusted without affecting the display quality or requiring changes to signal voltage values.
2Reliability
If signal voltage values are changed to correct load non-uniformity among scan lines and data lines, then brightness unevenness may be reduced, but the correction becomes practically impossible due to the complexity of minutely changing respective signal voltage values
Solution Approach 1:
Instead of changing signal voltage values, the patent changes the physical parameter of capacitance by creating additional intersection points between signal lines in the non-display region. This structural parameter change directly balances the electrical load on each signal line, achieving brightness uniformity without complex voltage control.
3Ease of manufacture
If a rectangular display region is used, then manufacturing and signal line arrangement are simpler, but the effective display area ratio is reduced due to larger non-display regions
Solution Approach 1:
The patent utilizes the non-display region as an additional functional space for signal line intersections and capacitance adjustment. This approach allows the display region to be optimized for maximum area (odd-shaped) while the non-display region serves the dual purpose of housing driver circuits and providing intersection points for load balancing.
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 ensures high display quality even for non-rectangular shapes by correcting load non-uniformity through capacitance manipulation at intersections outside the display area, enhancing the effective display area ratio and reducing manufacturing complexity.
Implementation Method 1
the plurality of first signal lines and the plurality of second signal lines intersect each other, thereby making it possible to generate capacitances in the individual first and second signal lines
Data Source
AI summary
In an active matrix substrate, a plurality of pixels are arranged to correspond to a display region of a liquid crystal panel that has a shape other than a rectangular shape. Further, scan lines that are arranged along rows with the smaller number of the pixels than the other rows among a plurality of scan lines and data lines that are arranged along columns with the smaller number of the pixels than the other columns among a plurality of data lines intersect each other at a position other than the display region.