Display Panel Scan Driving Circuit Layout Optimization
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Solution Overview
Problem
Existing display technologies face challenges in efficiently reducing costs and improving yield due to the complexity of scan driving circuits in display apparatuses.
Innovation Solution
A display panel design that incorporates a scan driving circuit with a plurality of shift registers and clock signal lines, along with a power supply voltage bus and connection lines, all located on the same side of the substrate, optimizing the layout for cost reduction and improved yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the scan driving circuit is arranged in the display apparatus, then costs are reduced and yield is improved, but the layout complexity increases
Solution Approach 1:
The patent transitions from a conventional planar layout to a three-dimensional stacked architecture. The scan driving circuit is positioned on the same side of the substrate as the display elements, with connection lines extending through multiple layers (first and second connection lines in different planes). This vertical dimensionality change reduces layout complexity by utilizing z-axis space rather than requiring extensive lateral routing.
Solution Approach 2:
The connection architecture is segmented into multiple independent connection lines (first connection lines and second connection lines) that operate in different spatial planes. This segmentation allows independent routing optimization for different signal types, reducing interference and simplifying the overall layout design while maintaining high yield through modular fault isolation.
2Reliability
If multiple connection lines are used to connect scan driving circuit components, then electrical connectivity is improved, but manufacturing complexity increases
Solution Approach 1:
The connection line structure is designed with universal characteristics where the same basic connection line geometry and material composition serve multiple functions: signal transmission, power delivery, and ground reference. This multi-functionality reduces manufacturing complexity by using a single fabrication process suite for all connection lines rather than requiring different processes for different line types.
Solution Approach 2:
Multiple connection functions are merged into a unified connection line architecture. The first and second connection lines, while spatially separated, are manufactured using the same process steps and material layers, combining what could have been separate manufacturing operations into a single integrated process, thereby reducing manufacturing complexity while maintaining electrical connectivity reliability.
Data Source
AI summary
A display panel has a display area and a fan-out region. The display panel includes: a substrate; a scan driving circuit including shift registers and clock signal lines, sub-pixels and signal transmission lines that are located in the display area; and a power supply voltage bus and connection lines that are located in the fan-out region. The sub-pixels are arranged in rows and columns, sub-pixels in a column are arranged along a second direction. A signal transmission line is electrically connected to column(s) of sub-pixels. The connection lines include first connection sub-lines, second connection sub-lines and third connection sub-lines that extend along the second direction and are located away from the sub-pixels. A first connection sub-line, a second connection sub-line and a third connection sub-line are electrically connected to the signal transmission line, the power supply voltage bus, and a clock signal line, respectively.