GOA Shift Register Capacitor Segmentation Against Particle Shorts
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Solution Overview
Problem
In the display field, GOA (gate driving on array) circuits require a capacitor structure that occupies a larger area, making them prone to short circuits due to small foreign particles, which disrupts the normal operation of the GOA circuit.
Innovation Solution
The proposed solution involves a shift register design that includes a voltage control circuit and at least one driving output circuit. This circuit comprises an output transistor and a capacitor structure arranged along a specific direction, with conductive lines connecting them. The capacitor structure is divided into parallel capacitor units, allowing for targeted maintenance by cutting off specific conductive lines when a foreign particle is detected, thereby isolating the affected units and maintaining the operation of the shift register.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a capacitor structure is designed in the GOA circuit, then the circuit can be realized with low cost and narrow frame, but the capacitor structure occupies larger area and is prone to short circuits caused by foreign particles
Solution Approach 1:
The capacitor structure is divided into multiple capacitor units (first capacitor unit, second capacitor unit, etc.) that are connected in parallel. Each capacitor unit has its own conductive lines for voltage writing and signal output. This segmentation allows that when a foreign particle causes a short circuit in one capacitor unit, only that specific unit is affected while other capacitor units continue to operate normally, thus improving the overall reliability of the GOA circuit.
2Device complexity
If the capacitor structure is integrated as a whole, then the circuit operation is simplified, but a short circuit in one capacitor unit affects the entire structure and complicates maintenance
Solution Approach 1:
The capacitor structure is segmented into multiple independent capacitor units with separate conductive lines. Each capacitor unit can be independently controlled and maintained. When a short circuit occurs in one capacitor unit, the conductive lines of that specific unit can be cut off or isolated without affecting the operation of other capacitor units, significantly simplifying maintenance procedures.
Solution Approach 2:
Different capacitor units are configured with different conductive lines for voltage writing and signal output. This local differentiation allows that maintenance operations can be performed locally on the affected capacitor unit without disrupting the entire capacitor structure, enabling localized repair while maintaining overall system functionality.
Data Source
AI summary
A shift register is provided to include a voltage control circuit coupled to an output control node; at least one driving output circuit, each including an output transistor and a capacitor structure sequentially arranged along a first direction; a first conductive line therebetween and extending along a second direction and coupled to a signal output line configured for the driving output circuit; the output transistor includes a gate electrode coupled to the output control node and a first voltage writing electrode of the capacitor structure, a first electrode coupled to a clock signal line configured for the driving output circuit and a second electrode coupled to the first conductive line; a second conductive line is disposed between the first conductive line and the capacitor structure, and the first conductive line is coupled to a second voltage writing electrode of the capacitor structure through the second conductive line.