Dual Power Line Display Module Wiring Layout
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Solution Overview
Problem
In display modules, the intersection of power and drive signal wirings causes ground slits, leading to impedance changes and distortion of drive signals due to electromagnetic interference.
Innovation Solution
The display module design includes a first power line on one plane and a second power line on a perpendicular plane, with sub-lines arranged to surround the ends of the first power line, eliminating the need for intersection with drive signal wirings, and using conductive films for electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If power wirings and drive signal wirings are arranged on the same FPC plane, then the FPC structure is simplified, but ground slits are generated causing impedance changes and signal distortion
Solution Approach 1:
The patent transitions from a two-dimensional planar arrangement to a three-dimensional spatial arrangement by routing power wirings through the internal ground layer of the FPC while drive signal wirings remain on the outer surface. This dimensional separation eliminates intersections between power and signal paths, preventing ground slits and impedance changes while maintaining a compact overall structure.
Solution Approach 2:
The FPC is segmented into distinct functional layers: an outer surface layer for drive signal wirings and an internal ground layer for power wirings. This segmentation separates the power transmission path from the signal transmission path, eliminating electromagnetic interference and ground slit formation while maintaining structural integrity.
2Adaptability or versatility
If power wirings intersect with drive signal wirings, then routing flexibility is improved, but electromagnetic interference occurs causing signal distortion
Solution Approach 1:
The patent eliminates electromagnetic interference by moving power wirings to the internal ground layer, creating a three-dimensional separation from the two-dimensional drive signal wiring plane. This spatial separation maintains routing flexibility while preventing harmful electromagnetic coupling between power and signal paths.
Data Source
AI summary
A display module includes a display panel, a driver integrated circuit, a flexible printed circuit (FPC), a drive signal wiring and a power wiring. The driver integrated circuit applies power and a drive signal to the display panel. The FPC is electrically connected between the driver integrated circuit and a PCB. The drive signal wiring is extended from the FPC to the display panel through the driver integrated circuit and may transmit the drive signal to the display panel. The power wiring transmits the power to the display panel. The power wiring includes a first power line extended from the FPC to the driver integrated circuit, and a second power line extended from the first power line to the display panel. The second power line does not intersect the drive signal wiring, and a ground slit is not generated.