Dummy Gate Driving Circuit Layout for Narrow Display Bezels
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Solution Overview
Problem
Existing display devices face challenges in reducing the size of the gate bezel area and facilitating defect detection, particularly in organic light emitting display devices where the gate driving circuit is implemented in the panel, increasing the bezel size.
Innovation Solution
A lightweight gate driving circuit is designed with a dummy gate driving panel circuit configured to be simpler than the gate driving panel circuit, incorporating a start and end dummy gate driving panel circuit that generates feedback voltages and carry signals to other gate driving panel circuits, reducing the size and weight of the gate bezel area and enabling defect detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the gate driving circuit is implemented in the display panel, then the gate driving function can be integrated with the panel, but the gate bezel area size increases
Solution Approach 1:
The gate driving circuit is segmented into multiple independent gate driving panel circuits that can be distributed across different regions of the display panel. Each circuit drives a specific portion of gate lines, allowing the overall driving function to be achieved with smaller individual circuit units, thereby reducing the total bezel area required.
Solution Approach 2:
The patent transitions from a single centralized gate driving circuit to multiple distributed circuits arranged in a dimensional spread across the panel. This spatial distribution allows the driving function to be maintained while reducing the concentration of circuit elements in any single location, effectively reducing the bezel area footprint.
2Adaptability or versatility
If a complex gate driving panel circuit is used, then complete gate driving functionality is achieved, but defect detection becomes difficult
Solution Approach 1:
The patent introduces dummy gate driving panel circuits that are simplified copies of the functional circuits. These dummy circuits replicate the basic structure and signal flow of the actual gate driving circuits but with reduced complexity. By comparing the behavior of the dummy circuits with expected patterns, defects in the real circuits can be detected without the complexity of the full circuit design obscuring the analysis.
Solution Approach 2:
The dummy gate driving panel circuits incorporate feedback mechanisms that allow real-time monitoring of circuit operation. By feeding back signals from the dummy circuits and comparing them against expected behavior patterns, the system can identify defects in the actual gate driving circuits through the simplified proxy structures.
Data Source
AI summary
A gate driving circuit, may include n gate driving panel circuits configured to output two or more gate signals, wherein n is a natural number equal to or larger than 2, a start dummy gate driving panel circuit including a first transistor configured to output a first signal, the first transistor electrically connected to at least one gate driving panel circuit adjacent to the start dummy gate driving panel among the n gate driving panel circuits, and an end dummy gate driving panel circuit including a second transistor configured to output a second signal, the second transistor electrically connected to at least one gate driving panel circuit adjacent to the end dummy gate driving panel among the n gate driving panel circuits.