Liquid crystal display device and goa circuit of the same
AssigneeShenzhen China Star Optoelectronics Technology Co., Ltd.
InventorLongqiang SHI
Life of this patent
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Abstract
A liquid crystal display device and a GOA circuit of the same are provided. The GOA circuit includes multiple cascaded GOA units, wherein an N-th stage GOA unit of the multiple cascaded GOA units comprises: a pull-up control module, a pull-up module, a transmission module, a pull-down module, a pull-down maintaining module and a bootstrap capacitor. The GOA circuit can ensure to finish a displaying and driving of liquid crystals, greatly simplify the circuit design, save the cost of the circuit, and reduce the size of the GOA circuit so that the liquid crystal display device can have a design space for a narrower frame.
Claims19
A GOA circuit comprising multiple cascaded GOA units, wherein a N-th stage GOA unit of the multiple cascaded GOA units comprises:
- a pull-up control module, a pull-up module, a transmission module, a pull-down module, a pull-down maintaining module and a bootstrap capacitor;
- wherein, the pull-up control module is connected with the transmission module and a pull-down maintaining module, one terminal of the bootstrap capacitor is connected to the transmission module and the pull-up module, the pull-down module is connected to the transmission module and a scanning line of the present stage, the pull-down maintaining module and the pull-down module are also connected with a pull-down signal line, and the pull-up module is connected with a clock signal line and the scanning line of the present stage;
- the pull-up control module includes a first thin-film transistor T11, a gate of the first thin-film transistor T11 is used for receiving a trigger signal of a (N−2)-th stage GOA unit, a source of the first thin-film transistor T11 is used for connecting a scanning line signal of the (N−2)-th stage GOA unit, and a drain of the first thin-film transistor T11 is connected with the transmission module and the pull-down maintaining module;
- the pull-down maintaining module 500 includes a sixth thin-film transistor T51, a seventh thin-film transistor T53, an eighth thin-film transistor T32, a ninth thin-film transistor T42, a tenth thin-film transistor T52 and an eleventh thin-film transistor T54;
- a gate of the sixth thin-film transistor T51 is connected with the clock signal line, a source of the sixth thin-film transistor T51 is connected with a source of the seventh thin-film transistor T53, a drain of the sixth thin-film transistor T51 is connected with a gate of the seventh thin-film transistor T53, and a source of the tenth thin-film transistor T52;
- a drain of the seventh thin-film transistor T53 is connected with a gate of the ninth thin-film transistor T42 and a source of the eleventh thin-film transistor T54;
- a gate of the eighth thin-film transistor T32 is connected with the clock signal line, a source of the eighth thin-film transistor T32 is connected with the drain of the first thin-film transistor T11, and a drain of the eighth thin-film transistor T32 is connected with the scanning line of the present stage and a source of the ninth thin-film transistor T42;
- a drain of the ninth thin-film transistor T42 is connected with the pull-down signal line;
- a gate of the tenth thin-film transistor T52 is connected with a drain of the first thin-film transistor T11;
- a drain of the tenth thin-film transistor T52 is connected with the pull-down signal line;
- a gate of the eleventh thin-film transistor T54 is connected with a drain of the first thin-film transistor T11, a drain of the eleventh thin-film transistor T54 is connected with the pull-down signal line.
A GOA circuit comprising multiple cascaded GOA units, wherein a N-th stage GOA unit of the multiple cascaded GOA units comprises:
- a pull-up control module, a pull-up module, a transmission module, a pull-down module, a pull-down maintaining module and a bootstrap capacitor;
- wherein, the pull-up control module is connected with the transmission module and a pull-down maintaining module, one terminal of the bootstrap capacitor is connected to the transmission module and the pull-up module, the pull-down module is connected to the transmission module and a scanning line of the present stage, the pull-down maintaining module and the pull-down module are also connected with a pull-down signal line, and the pull-up module is connected with a clock signal line and the scanning line of the present stage.
A liquid crystal display device, wherein the liquid crystal display device includes a GOA circuit, and the GOA circuit comprises multiple cascaded GOA units, wherein a N-th stage GOA unit of the multiple cascaded GOA units comprises:
- a pull-up control module, a pull-up module, a transmission module, a pull-down module, a pull-down maintaining module and a bootstrap capacitor;
- wherein, the pull-up control module is connected with the transmission module and a pull-down maintaining module, one terminal of the bootstrap capacitor is connected to the transmission module and the pull-up module, the pull-down module is connected to the transmission module and a scanning line of the present stage, the pull-down maintaining module and the pull-down module are also connected with a pull-down signal line, and the pull-up module is connected with a clock signal line and the scanning line of the present stage.
Dependencies are inferred from the claim text.