Display Panel Wire Thickness Zoning for High-Frequency Signals
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Solution Overview
Problem
High-frequency display devices face challenges in reducing wiring resistances, particularly in peripheral connections between drive chips and printed circuit boards, which affects signal transmission and increases the risk of insulation layer damage and short-circuits.
Innovation Solution
The thickness of metal wires in the display area is kept smaller than those in the non-display area, specifically the second metal wires connecting the drive and control circuit units, to reduce resistances and minimize the risk of insulation layer damage, while ensuring high-frequency signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the thickness of metal wires in the non-display area is increased to reduce wiring resistance, then the resistance of peripheral connections is reduced, but the complexity of the device structure increases
Solution Approach 1:
The patent applies different metal wire thicknesses to different areas: the first metal wires in the display area maintain a first thickness, while the second metal wires in the non-display area have a greater second thickness. This local differentiation reduces wiring resistance in the peripheral connections without unnecessarily increasing complexity throughout the entire device, thereby improving signal transmission quality where it is most needed.
2Reliability
If the thickness of metal wires is increased to reduce resistance, then electrical conductivity is improved, but the risk of insulation layer damage and short-circuits increases
Solution Approach 1:
The patent implements local quality by specifying that the second metal wires in the non-display area have a greater thickness than the first metal wires in the display area. This targeted thickening reduces resistance in peripheral connections while avoiding unnecessary thickening in the display area, thereby maintaining electrical conductivity where needed without proportionally increasing the risk of insulation layer damage and short-circuits across the entire device.
Data Source
AI summary
A display panel having a display area and a non-display area surrounding the display area, and a display device. The display panel includes a drive circuit unit disposed in the non-display area; a control circuit unit disposed in the non-display area; a first metal wire at least partially disposed in the display area; and a second metal wire disposed in the non-display area and electrically connecting the drive circuit unit with the control circuit unit. A thickness of the second metal wire is greater than a thickness of the first metal wire.