Shift register
First Claim
1. A shift register, comprising a plurality of electrically connected shift units, wherein each shift unit comprises:
- a pull-up circuit, for outputting a first signal to an output node according to the first signal and a voltage level of a driving node;
a pull-up driving circuit, electrically connected to the pull-up circuit, for driving the pull-up circuit according to an output voltage of the previous shift unit;
a pull-down driving circuit, electrically connected to the pull-up driving circuit, for outputting a low voltage level to the driving node and the output node, according to the first signal and a second signal, comprising;
a first transistor, comprising a first end for receiving the first signal, a control end electrically connected to the first end, and a second end electrically connected to a first node;
a second transistor, comprising a first end electrically connected to the first node, a control end electrically connected to the output node and a second end for receiving the low voltage level;
a third transistor, comprising a first end electrically connected to the output node, a control end electrically connected to the first node, and a second end for receiving the low voltage level;
a fourth transistor, comprising a first end electrically connected to the driving node, a control end for receiving the first signal, and a second end electrically connected to the output node; and
a fifth transistor, comprising a first end electrically connected to the output node, a control end for receiving the second signal, and a second end for receiving the low voltage level; and
a pull-down circuit, electrically connected to the pull-up circuit and the pull-up driving circuit, for resetting the pull-up driving circuit according to the voltage level of the output node, and outputting the low voltage level to the driving node and the output node according to a third signal and a fourth signal.
1 Assignment
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Accused Products
Abstract
A shift register includes a plurality of electrically connected shift units. Each shift unit includes a pull-up circuit, a pull-up driving circuit, a pull-down circuit, and a pull-down driving circuit. The pull-up circuit outputs a first signal to an output node according to the first signal and a voltage of a driving node. The pull-up driving drives the pull-up circuit according to an output voltage of the previous shift unit. The pull-down driving circuit outputs a low level voltage to the driving node and the output node according to the first signal and a second signal. The pull-down circuit resets the pull-up driving circuit according to the voltage of the output node and outputs the low level voltage to the output node and the driving node according to a third signal and a fourth signal.
21 Citations
14 Claims
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1. A shift register, comprising a plurality of electrically connected shift units, wherein each shift unit comprises:
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a pull-up circuit, for outputting a first signal to an output node according to the first signal and a voltage level of a driving node; a pull-up driving circuit, electrically connected to the pull-up circuit, for driving the pull-up circuit according to an output voltage of the previous shift unit; a pull-down driving circuit, electrically connected to the pull-up driving circuit, for outputting a low voltage level to the driving node and the output node, according to the first signal and a second signal, comprising; a first transistor, comprising a first end for receiving the first signal, a control end electrically connected to the first end, and a second end electrically connected to a first node; a second transistor, comprising a first end electrically connected to the first node, a control end electrically connected to the output node and a second end for receiving the low voltage level; a third transistor, comprising a first end electrically connected to the output node, a control end electrically connected to the first node, and a second end for receiving the low voltage level; a fourth transistor, comprising a first end electrically connected to the driving node, a control end for receiving the first signal, and a second end electrically connected to the output node; and a fifth transistor, comprising a first end electrically connected to the output node, a control end for receiving the second signal, and a second end for receiving the low voltage level; and a pull-down circuit, electrically connected to the pull-up circuit and the pull-up driving circuit, for resetting the pull-up driving circuit according to the voltage level of the output node, and outputting the low voltage level to the driving node and the output node according to a third signal and a fourth signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A shift register, comprising a plurality of electrically connected shift units, wherein each shift unit comprises:
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a pull-up circuit, for outputting a first signal to an output node according to the first signal and a voltage level of a driving node; a pull-up driving circuit, comprising a first transistor electrically connected to the pull-up circuit, for driving the pull-up circuit according to an output voltage of the previous shift unit; a pull-down driving circuit, electrically connected to the pull-up driving circuit, for outputting a low voltage level to the driving node and the output node, according to the first signal and a second signal, comprising; a second transistor, comprising a first end electrically connected to the driving node, a control end for receiving the first signal, and a second end electrically connected to the output node; and a third transistor, comprising a first end electrically connected to the output node, a control end for receiving the second signal, and a second end for receiving the low voltage level; and a pull-down circuit, electrically connected to the pull-up circuit and the pull-up driving circuit, for resetting the pull-up driving circuit according to the voltage level of the output node, and outputting the low voltage level to the driving node and the output node according to a third signal and a fourth signal, comprising; a fourth transistor, comprising a first end electrically connected to the driving node, a control end for receiving the third signal, and a second end for receiving the low voltage level; and a fifth transistor, comprising a first end electrically connected to the first end of the first transistor, a control end electrically connected to the output node, and a second end for receiving the low voltage level.
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14. A shift register, comprising a plurality of electrically connected shift units, wherein each shift unit comprises:
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a pull-up circuit, for outputting a first signal to an output node according to the first signal and a voltage level of a driving node; a pull-up driving circuit, comprising a first transistor electrically connected to the pull-up circuit, for driving the pull-up circuit according to an output voltage of the previous shift unit; a pull-down driving circuit, electrically connected to the pull-up driving circuit, for outputting a low voltage level to the driving node and the output node, according to the first signal and a second signal; and a pull-down circuit, electrically connected to the pull-up circuit and the pull-up driving circuit, for resetting the pull-up driving circuit according to the voltage level of the output node, and outputting the low voltage level to the driving node and the output node according to a third signal and a fourth signal, comprising; a second transistor, comprising a first end electrically connected to the driving node, a control end for receiving the third signal, and a second end for receiving the low voltage level; and a third transistor, comprising a first end electrically connected to the first end of the first transistor, a control end electrically connected to the output node, and a second end for receiving the low voltage level.
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Specification