Goa circuit, display panel and display device
AssigneeWuhan China Star Optoelectronics Technology Co., Ltd.
InventorChao TIAN
Life of this patent
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Abstract
A gate driver on array (GOA) circuit, a display panel and a display device are provided. The GOA circuit includes m cascaded GOA units. An nth-stage GOA unit includes a second feedback module. The second feedback module, electrically connected to the second node of the nth-stage GOA unit, a first node of the (n−1)th-stage GOA unit, the clock signal of the (n+1)th-stage GOA unit, a gate driving signal of the nth-stage GOA unit and the constant low voltage signal, to pull down voltage applied on a second node of the nth-stage GOA unit. The one-way feedback could achieve the linear design more easily, raise the circuit stability, and thus the GOA circuit could be integrated in the display panel more easily to achieve the design of placing the GOA circuit in the active area.
Claims10
A gate driver on array (GOA) circuit, comprising m cascaded GOA units, wherein an nth-stage GOA unit comprises:
- an input module, electrically connected to a clock signal of an (n+1)th-stage GOA unit, a gate driving signal of an (n−1)th-stage GOA unit, and a first node of the nth-stage GOA unit;
- an output pull-up module, electrically connected to the first node of the nth-stage GOA unit, a constant high voltage signal and a clock signal of the nth-stage GOA unit;
- a pull-down control module, electrically connected to the constant high voltage signal, the clock signal of the (n+1)th-stage GOA unit and a second node of the nth-stage GOA unit;
- an output pull-down module, electrically connected to the second node of the nth-stage GOA unit and a constant low voltage signal;
- a first feedback module, electrically connected to the first node and the second node of the nth-stage GOA unit, the clock signal of the nth-stage GOA unit and the constant low voltage signal;
- a second feedback module, electrically connected to the second node of the nth-stage GOA unit, a first node of the (n−1)th-stage GOA unit, the clock signal of the (n+1)th-stage GOA unit, a gate driving signal of the nth-stage GOA unit and the constant low voltage signal;
- and
- a FM function module, electrically connected to the constant low voltage signal and a global signal,
- where m and n are both integers and m≥n≥1.
A display panel, comprising a gate driver on array (GOA) circuit, the GOA circuit comprising m cascaded GOA units, wherein an nth-stage GOA unit comprises:
- an input module, electrically connected to a clock signal of an (n+1)th-stage GOA unit, a gate driving signal of an (n−1)th-stage GOA unit, and a first node of the nth-stage GOA unit;
- an output pull-up module, electrically connected to the first node of the nth-stage GOA unit, a constant high voltage signal and a clock signal of the nth-stage GOA unit;
- a pull-down control module, electrically connected to the constant high voltage signal, the clock signal of the (n+1)th-stage GOA unit and a second node of the nth-stage GOA unit;
- an output pull-down module, electrically connected to the second node of the nth-stage GOA unit and a constant low voltage signal;
- a first feedback module, electrically connected to the first node and the second node of the nth-stage GOA unit, the clock signal of the nth-stage GOA unit and the constant low voltage signal;
- a second feedback module, electrically connected to the second node of the nth-stage GOA unit, a first node of the (n−1)th-stage GOA unit, the clock signal of the (n+1)th-stage GOA unit, a gate driving signal of the nth-stage GOA unit and the constant low voltage signal;
- and
- a FM function module, electrically connected to the constant low voltage signal and a global signal,
- where m and n are both integers and m≥n≥1.
A display device comprising a display panel that comprises a gate driver on array (GOA) circuit, the GOA circuit comprising m cascaded GOA units, wherein an nth-stage GOA unit comprises:
- an input module, electrically connected to a clock signal of an (n+1)th-stage GOA unit, a gate driving signal of an (n−1)th-stage GOA unit, and a first node of the nth-stage GOA unit;
- an output pull-up module, electrically connected to the first node of the nth-stage GOA unit, a constant high voltage signal and a clock signal of the nth-stage GOA unit;
- a pull-down control module, electrically connected to the constant high voltage signal, the clock signal of the (n+1)th-stage GOA unit and a second node of the nth-stage GOA unit;
- an output pull-down module, electrically connected to the second node of the nth-stage GOA unit and a constant low voltage signal;
- a first feedback module, electrically connected to the first node and the second node of the nth-stage GOA unit, the clock signal of the nth-stage GOA unit and the constant low voltage signal;
- a second feedback module, electrically connected to the second node of the nth-stage GOA unit, a first node of the (n−1)th-stage GOA unit, the clock signal of the (n+1)th-stage GOA unit, a gate driving signal of the nth-stage GOA unit and the constant low voltage signal;
- and
- a FM function module, electrically connected to the constant low voltage signal and a global signal,
- where m and n are both integers and m≥n≥1.
Dependencies are inferred from the claim text.