Display Panel Wiring Layout for Power-Off Uniformity
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Solution Overview
Problem
The display panel experiences uneven display when powered off due to uneven distribution of metal patterns, which is a result of complex wiring arrangements and high manufacturing costs in Fan-out In Active Area (FIAA) technology.
Innovation Solution
The display panel incorporates a design with data lines, fan-out lines, and dummy lines in the active area, where dummy lines are alternately spaced from data lines and disposed on extension lines of fan-out lines, improving wiring distribution density and reducing capacitive coupling effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If Fan-out In Active Area (FIAA) technology is used to reduce the width of the lower frame, then the frame width is reduced, but the wiring arrangement becomes complex and manufacturing cost increases
Solution Approach 1:
The invention segments the active area into multiple regions with different wiring density requirements. By dividing the display panel into a first active area, second active area, and third active area, each region can have optimized wiring arrangements, reducing overall complexity while maintaining the reduced frame width benefit of FIAA technology.
Solution Approach 2:
The invention applies local quality by having different wiring configurations in different regions of the active area. The first data lines are disposed in the first active area, second data lines in the second active area, and third data lines in the third active area, with each region having locally optimized wiring density and arrangement to reduce complexity while maintaining uniform display effect.
2Ease of manufacture
If the same metal is selected for power lines and data lines in the active area, then manufacturing cost is reduced, but uneven display appears when the display panel is power off
Solution Approach 1:
The invention applies local quality by introducing dummy data lines specifically in regions where uneven display occurs when the panel is powered off. These dummy lines are disposed in the second active area and extend along the second direction, creating local compensation for metal pattern distribution without requiring different metals throughout the entire panel, thus maintaining cost efficiency while improving display uniformity.
Solution Approach 2:
The invention changes the parameter of wiring distribution by adding dummy lines to modify the metal pattern density in specific regions. This parameter change compensates for the uneven metal distribution caused by using the same metal for all data lines, thereby eliminating the uneven display effect when powered off while maintaining the cost advantage of using identical metal materials.
3Reliability
If dummy lines are added to improve wiring distribution, then display uniformity is improved, but device complexity increases
Solution Approach 1:
The invention minimizes device complexity by applying dummy lines only locally in the second active area where uneven display occurs, rather than throughout the entire panel. The dummy data lines are strategically positioned to extend along the second direction and intersect with fan-out lines only where needed, providing display uniformity improvement with minimal increase in overall wiring structure complexity.
Solution Approach 2:
The dummy data lines serve multiple functions: they compensate for uneven metal pattern distribution to improve display uniformity when powered off, and they are integrated into the existing data line architecture to maintain signal transmission functionality. This multi-functionality reduces the need for separate compensation structures, thereby limiting the increase in device complexity.
Data Source
AI summary
The present application provides a display panel and a display device. The display panel comprises a plurality of dummy lines, a plurality of first data lines and a plurality of fan-out lines electrically connected to a plurality of the first data lines in the active area. A plurality of the dummy lines include a plurality of first dummy lines being alternately spaced from a plurality of first data lines and a plurality of second dummy lines being disposed on extension lines of a plurality of fan-out lines, so as to improve the distribution density of wirings in the active area, thereby improving the problem of uneven display when the display panel is power off.