Parallel Drive Line Segmentation for Display Panel Impedance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The narrow border of display panels leads to smaller WOA spaces, resulting in increased impedance values for drive traces, causing signal distortion and affecting display homogeneity in LCDs.
Innovation Solution
A WOA structure with parallel circuit configurations using single or dual layer metal wiring and flexible circuit boards to connect drive line portions, reducing the resistance value of type B traces and enhancing signal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the border of the display panel is made narrower, then the display area is increased, but the WOA space becomes smaller causing the trace to be thinner and longer which increases impedance and causes signal distortion
Solution Approach 1:
The type B trace is divided into multiple segments (first type B trace and second type B trace) that are connected in parallel between the same endpoints. This segmentation allows each individual trace segment to be shorter and thicker, reducing impedance while maintaining the overall narrow border design.
Solution Approach 2:
Multiple type B trace segments are merged into a parallel circuit configuration, where the first type B trace and second type B trace both connect the same driver IC to the same pixel electrodes. This merging in parallel reduces the total impedance by providing multiple current paths.
2Device complexity
If the trace is made thinner to fit the narrow border, then the WOA space is utilized better, but the resistance value increases causing serious signal distortion
Solution Approach 1:
The trace path is segmented into multiple parallel routes (first type B trace and second type B trace) instead of using a single thin trace. Each segment can be optimized for appropriate thickness to maintain low resistance while fitting within the available WOA space.
Solution Approach 2:
The wiring solution moves from a single-dimension thin trace to a multi-dimensional parallel structure, utilizing both horizontal and vertical routing dimensions to create multiple trace paths that collectively provide low impedance while efficiently using the WOA space.
3Length of stationary object
If the trace is made longer to reach across the display area, then the coverage is increased, but the impedance value gets larger affecting display homogeneity
Solution Approach 1:
The long trace path is segmented into multiple shorter parallel traces (first type B trace and second type B trace) that collectively cover the same display area. Each individual segment is shorter, reducing the impedance contribution of each segment while maintaining overall coverage.
Solution Approach 2:
Multiple trace segments are combined in parallel to achieve the same coverage as a single long trace but with lower total impedance. The parallel configuration allows current to distribute across multiple shorter paths, reducing overall resistance and improving display homogeneity.
Data Source
AI summary
A display panel and a display device using the same are provided. The display panel includes: a first substrate including a display area and a wiring area, wherein active switches and pixel units are disposed on the display area of the first substrate, and the pixel units are coupled to the active switches, respectively; a second substrate disposed opposite the first substrate; a first drive line portion disposed in the wiring area and including first circuit leads; a second drive line portion disposed in the wiring area and including second circuit leads; and a first interface unit disposed between the first drive line portion and the second drive line portion. The first interface unit connects the first circuit leads to the second circuit leads, respectively, and the second drive line portion is electrically coupled to the first drive line portion to form a parallel circuit.