GOA Clock Branch Line Impedance Matching via Protrusion Components
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Solution Overview
Problem
The inconsistent impedance and capacitive reactance of carriers transmitting clock signals in GOA circuits lead to interference and the appearance of horizontal dark lines during progressive scanning in display panels.
Innovation Solution
The display panel design includes clock main lines and clock branch lines on different layers, with specific connection components and protrusion components that allow for adjustment of impedance and capacitive reactance by varying the lengths and areas of these components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard clock branch lines are used without impedance matching structures, then the device complexity is low, but the impedance and capacitive reactance are inconsistent causing horizontal dark lines
Solution Approach 1:
The patent applies local quality by making each clock branch line have unique protrusion components with specific areas tailored to that line's requirements. Each branch line is locally optimized with different protrusion areas to achieve consistent impedance and capacitive reactance across all lines, eliminating horizontal dark lines while maintaining overall system reliability.
Solution Approach 2:
The patent changes physical parameters by adjusting the areas of protrusion components in clock branch lines. By varying the protrusion areas, the impedance and capacitive reactance of each branch line are tuned to match standard values, ensuring consistent signal transmission quality across all clock lines without requiring complete structural redesign.
2Reliability
If protrusion components with different areas are added to clock branch lines, then impedance and capacitive reactance consistency is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent segments the impedance matching function into discrete protrusion components with different areas. By dividing the clock branch lines into sections with specific protrusions, the complex impedance matching problem is broken down into manageable geometric elements that can be controlled during manufacturing, reducing overall precision requirements while achieving the desired consistency.
Solution Approach 2:
The patent introduces a new dimension by adding protrusion components that extend in the vertical direction above the substrate plane. This three-dimensional approach allows impedance and capacitive reactance control without requiring extreme precision in the planar dimensions, as the protrusion height and area provide additional degrees of freedom for tuning electrical characteristics.
Data Source
AI summary
A display panel of the present application is disclosed. The display panel includes a GOA circuit, a plurality of clock main lines on a side of the GOA circuit, and a plurality of clock branch lines connected to each of the corresponding clock main lines, respectively. By providing the different first protrusion components and second protrusion components in the corresponding clock branch lines, the equivalent impedance of these clock branch lines can be adjusted to be equal. By providing the bridge components with different areas in the corresponding clock branch lines, the equivalent capacitive reactance of these clock branch lines can be adjusted to be equal.