Gate driver on array (goa) circuit and display panel
AssigneeShenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
InventorsYan XUE, Xian WANG
Life of this patent
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Abstract
The present invention provides a gate driver on array (GOA) circuit and a display panel, in the GOA circuit, a nth one of GOA units has a pull-up control module, a logical addressing module, a pull-up module, first pull-down module, a second pull-down module, a first pull-down maintenance module connected to a first node, a second pull-down module, a third pull-down module, and a second pull-down maintenance module connected to a third node, and a logical addressing module. The logical addressing module pulls up a potential of a second node potential twice to facilitate increasing a threshold voltage margin.
Claims20
A gate driver on array (GOA) circuit, comprising a number “m” of GOA units connected in cascade, wherein a nth one of the GOA units comprises:
- a pull-up control module connected to a first node and configured to pull up a potential of the first node in a display time period;
- a logical addressing module comprising a second node, connected to the first node, and configured to pull up a potential of the second node twice in the display time period and to pull up the potential of the first node through the second node in a blank time period;
- a pull-up module connected to the first node, configured to pull up a potential of a nth stage transmission signal, a potential of a first output signal, and a potential of a second output signal;
- a first pull-down module connected to the first node, and configured to pull down the potential of the first node in the blank time period;
- a second pull-down module connected to the first node and a third node and configured to pull down the potential of the first node and a potential of the third node in the display time period;
- a third pull-down module connected to the third node and the second pull-down module and configured to pull down the potential of the third node in the blank time period;
- a first pull-down maintenance module comprising the third node, connected to the first node and the first pull-down module, and configured to keep the potential of the first node low;
- and
- a second pull-down maintenance module connected to the third node and the pull-up module and configured to keep the potential of the nth stage transmission signal, the potential of the first output signal, and the potential of the second output signal low.
A display panel, comprising a gate driver on array (GOA) circuit, the GOA circuit comprising a number “m” of GOA units connected in cascade, wherein a nth one of the GOA units comprises:
- a pull-up control module connected to a first node and configured to pull up a potential of the first node in a display time period;
- a logical addressing module comprising a second node, connected to the first node, and configured to pull up a potential of the second node twice in the display time period and to pull up the potential of the first node through the second node in a blank time period;
- a pull-up module connected to the first node, configured to pull up a potential of a nth stage transmission signal, a potential of a first output signal, and a potential of a second output signal;
- a first pull-down module connected to the first node, and configured to pull down the potential of the first node in the blank time period;
- a second pull-down module connected to the first node and a third node and configured to pull down the potential of the first node and a potential of the third node in the display time period;
- a third pull-down module connected to the third node and the second pull-down module, and configured to pull down the potential of the third node in the blank time period;
- a first pull-down maintenance module comprising the third node, connected to the first node and the first pull-down module, and configured to keep the potential of the first node low;
- and
- a second pull-down maintenance module connected to the third node and the pull-up module and configured to keep the potential of the nth stage transmission signal, the potential of the first output signal, and the potential of the second output signal low.
Dependencies are inferred from the claim text.