Display Panel Transmission Line Width Variation for Signal Uniformity
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Solution Overview
Problem
Large liquid crystal displays often experience non-uniform display effects due to the inefficiencies in scan line driving circuits, particularly as the panel size increases, leading to variations in display quality across different positions.
Innovation Solution
A display panel design that incorporates a scan driving circuit with shift registers, transmission signal lines, and clock signal lines, where the line width of transmission signal lines varies to minimize resistance losses and ensure consistent signal transmission, using multiple metal layers and metal bridging holes to optimize signal delivery to scan lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If transmission signal lines with uniform line width are used, then manufacturing is simplified, but resistance losses vary across different positions leading to non-uniform display effects
Solution Approach 1:
The patent applies local quality by varying the line width of transmission signal lines according to their specific position and length. Transmission signal lines that are longer or have higher resistance are given larger line widths to reduce resistance losses, while shorter lines maintain smaller widths. This localized adjustment ensures uniform signal quality across the display panel without requiring all lines to have the same manufacturing dimensions.
2Reliability
If the line width of transmission signal lines is increased to reduce resistance losses, then signal transmission quality improves, but manufacturing complexity and material usage increase
Solution Approach 1:
The patent implements parameter changes by systematically adjusting the line width parameter of transmission signal lines based on their length and resistance characteristics. Instead of using a fixed line width for all transmission lines, the patent varies this parameter to optimize electrical performance. This approach improves signal transmission quality while maintaining manageable manufacturing complexity through a systematic design rule rather than arbitrary variations.
3Power
If a gate driver IC is used to drive scan lines, then driving capability is sufficient, but cost increases
Solution Approach 1:
The patent applies the extraction principle by removing the external gate driver IC from the system and integrating its functionality directly into the display panel through a scan driving circuit formed using the same thin-film transistor fabrication process. This integration eliminates the need for separate high-cost components while maintaining sufficient scan line driving capability through carefully designed transmission signal lines with optimized line widths that compensate for resistance losses.
Solution Approach 2:
The patent implements self-service by enabling the display panel to drive its own scan lines through an integrated scan driving circuit that uses the same manufacturing process as the panel itself. The transmission signal lines are designed with varying line widths to self-compensate for resistance losses, eliminating the need for external assistance from a gate driver IC. This self-sufficient approach reduces cost while maintaining driving capability.
Data Source
AI summary
The present application discloses a display panel and a display device. In each set of transmission signal lines, the line width of a transmission signal line correspondingly connected to a clock signal line close to the display area is smaller than that of a transmission signal line correspondingly connected to a clock signal line away from the display area.