Gate Driving Circuit Repair Line for Display Panel Yield
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Solution Overview
Problem
Existing gate driving circuits in display panels face challenges in maintaining output of pulse signals with adjustable widths due to reliance on other gate driving circuits for control signals, leading to low yield when these circuits fail.
Innovation Solution
A gate driving circuit design that includes multiple stages of gate driving units and at least one repair line, allowing for the transmission of scan signals across different layers and enabling the output of pulse signals even if the primary scan signal fails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the gate driving circuit uses control signals from other gate driving circuits, then the design complexity is reduced, but the reliability decreases because the circuit fails when other gate driving circuits fail
Solution Approach 1:
The gate driving circuit is divided into multiple independent gate driving units (first, second, third, fourth units), each capable of receiving scan signals through independent pathways. This segmentation allows the circuit to maintain functionality even when some units fail, as other units can continue operating independently.
Solution Approach 2:
The patent introduces a multi-layer signal transmission structure where scan signals can be transmitted through different layers (first layer and second layer). The first gate driving unit receives scan signals through a first control signal line, while the second gate driving unit receives scan signals through a second control signal line that intersects with the first layer at a different spatial dimension, providing redundant signal pathways.
2Ease of manufacture
If the gate driving circuit integrates on array substrate, then production costs are reduced and frame design is narrowed, but the circuit lacks independence and fails when other circuits fail
Solution Approach 1:
Each gate driving unit is designed with multi-functionality to perform multiple roles. The gate driving units can independently receive scan signals through different control signal lines and generate corresponding pulse signals. This universal design ensures that the integrated circuit maintains functionality and independence even when integrated on the array substrate, as each unit can operate autonomously through multiple signal pathways.
Solution Approach 2:
The patent employs different pulse signal widths (first pulse signal width and second pulse signal width) generated by different gate driving units. By varying the pulse signal parameters (width, timing), the circuit achieves independent operation capabilities while maintaining integration, allowing each unit to function independently with distinct signal characteristics.
Data Source
AI summary
A gate driving circuit includes a plurality of stages of gate driving units and at least one repair line. A nth stage gate driving unit in the plurality of stages of gate driving units is connected to at least a first control signal line configured to receive a nth stage scan signal. The nth stage gate driving unit is configured to output a nth stage pulse signal under a control of the nth stage scan signal. The repair line intersects with the first control signal line, and disposed in different layers from the first control signal line. The repair line is configured to transmit a mth stage scan signal, both of n and m are positive integers greater than 0, and n is greater than or less than m.