Gate Driving Circuit Segmentation for Bezel Reduction and Defect Detection
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Solution Overview
Problem
Existing display devices with gate driving circuits implemented in the display panel increase the size of the gate bezel area, and there is a need for improved defect detection mechanisms.
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 facilitate defect detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the gate driving circuit is implemented in the display panel using a gate in panel (GIP) type, then the gate driving function is integrated into the panel, but the size of the gate bezel area is increased
Solution Approach 1:
The gate driving circuit is divided into multiple independent gate driving panel circuits, each responsible for driving specific gate lines. This segmentation allows the circuit to be distributed across the panel rather than concentrated in a large bezel area, reducing the gate bezel area size while maintaining integration functionality
Solution Approach 2:
The gate driving panel circuits are arranged in a distributed manner across the display panel, utilizing the two-dimensional space of the panel to distribute the circuit functionality. This dimensional distribution replaces the traditional concentrated bezel layout, reducing the gate bezel area
2Adaptability or versatility
If a complex gate driving panel circuit is used to drive the display panel, then the gate driving function is complete, but defect detection becomes difficult
Solution Approach 1:
A feedback circuit is introduced that generates feedback signals based on the output of the gate driving panel circuits. These feedback signals are used to detect defects by comparing expected versus actual circuit behavior, enabling automatic defect identification without requiring complex manual testing procedures
Solution Approach 2:
A dummy gate driving panel circuit is created as a simplified copy of the actual gate driving panel circuit. This dummy circuit replicates the essential functionality with reduced complexity, allowing defect detection through comparison between the dummy circuit behavior and the actual circuit, thereby simplifying the detection process while maintaining detection accuracy
3Area of stationary object
If the dummy gate driving panel circuit is configured to be simpler than the gate driving panel circuit, then the gate bezel area size is reduced, but the circuit functionality may be insufficient
Solution Approach 1:
The dummy gate driving panel circuit is designed as a simplified copy that captures the essential functional characteristics of the actual gate driving panel circuit without including all its complexity. This selective copying maintains sufficient functionality for defect detection purposes while significantly reducing the circuit area required in the gate bezel
Solution Approach 2:
The dummy gate driving panel circuit incorporates only the necessary functional elements local to the regions where defects need to be detected. By applying local quality principles, the circuit maintains sufficient functionality for detection purposes in critical areas while omitting unnecessary complexity in other areas, thereby reducing the overall gate bezel area
Data Source
AI summary
A gate driving panel circuit and a display device are discussed. The gate driving circuit in an example includes n gate driving panel circuits configured to output two or more gate signals where, n is a natural number equal to or larger than 2, a start dummy gate driving panel circuit configured to generate a first feedback voltage and transfer a start carry signal to a first gate driving panel circuit among the plurality of gate driving panel circuits, and an end dummy gate driving panel circuit configured to generate a second feedback voltage and transferring an end carry signal to an nth gate driving panel circuit.