Scanning driving circuit and display apparatus
First Claim
1. A scanning driving circuit, comprising:
- a first voltage terminal;
a second voltage terminal;
a scanning signal output terminal for outputting a high level scanning signal or a low level scanning signal;
a pull-up circuit for receiving a clock signal of a current stage and controlling the scanning signal output terminal to output of a high level scanning signal according to the clock signal of the current stage;
a transmission circuit, connected to the pull-up circuit for outputting a high level stage transmission signal of a current stage;
a pull-up control circuit, connected to the transmission circuit and receiving a stage transmission signal of a previous stage for charging the pull-up control signal point to pull up the potential of the pull-up control signal point to a high level;
a pull-down maintenance circuit connected to the pull-up control circuit, the first voltage terminal and the second voltage terminal and receiving a high voltage direct current voltage, for maintaining the low level of the pull-up control signal point, and the low level of the scanning signal outputted from the scanning signal output terminal;
a bootstrap circuit for raising the potential of the pull-up control signal point;
a pull-down circuit connected to the transmission circuit, the pull-down maintenance circuit, and the first voltage terminal, for receiving a stage transmission signal of a next stage and controlling the scanning signal output terminal to output the low level scanning signal in accordance with the stage transmission signal of the next stage;
wherein the pull-up circuit comprises a first controllable switch, a first terminal of the first controllable switch receiving the clock signal of the current stage, a control terminal of the first controllable switch is connected to the transmission circuit and the pull-down circuit, a second terminal of the first controllable switch is connected to the transmission circuit and the scanning signal output terminal; and
wherein when the scanning driving circuit is not operated, the second voltage terminal is controlled to be at high potential, and when the scanning driving circuit is operated, the second voltage terminal becomes a low potential, and the low potential is the same with the first voltage terminal; and
wherein the pull-down maintenance circuit comprises fourth to ninth controllable switches, a control terminal of the fourth controllable switch is connected to a control terminal of the fifth controllable switch, a first terminal of the fourth controllable switch is connected to the pull-up control circuit, a second terminal of the fourth controllable switch is connected to the first voltage terminal, a first terminal of the fifth controllable switch is connected to the scanning signal output terminal, a second terminal of the fifth controllable switch is connected to the first voltage terminal, a second terminal of the sixth controllable switch is connected to a first terminal of the seventh controllable switch and the control terminal of the fifth controllable switch, a first terminal of the sixth controllable switch is connected to a first terminal of the eighth controllable switch and a control terminal of the eighth controllable switch and to receive the high voltage direct current voltage, a control terminal of the sixth controllable switch is connected to the second terminal of the eighth controllable switch and a first terminal of the ninth controllable switch, a control terminal of the seventh controllable switch is connected to a control terminal of the ninth controllable switch and the pull-up control circuit, a second terminal of the seventh controllable switch and a second terminal of the ninth controllable switch are both connected to the second voltage terminal.
2 Assignments
0 Petitions
Accused Products
Abstract
The present application discloses a scanning driving circuit and a display apparatus. The scanning driving circuit includes a scanning signal output terminal; a pull-up circuit controlling the scanning signal output terminal to output a high level scanning signal; a transmission circuit for outputting a stage transmission signal of a current stage; a pull-up control circuit to charge the pull-up control signal point; a pull-down maintaining circuit maintains the low level of the pull-up control signal point and the scanning signal output terminal and releases the high potential of the pull-up control signal point; a bootstrap circuit raises the potential of the pull-up control signal point; a pull-down circuit controls the scanning signal output terminal to output a low level, thereby solving the problem of the large current generated when the display device is turned on and off.
-
Citations
17 Claims
-
1. A scanning driving circuit, comprising:
- a first voltage terminal;
a second voltage terminal;
a scanning signal output terminal for outputting a high level scanning signal or a low level scanning signal;a pull-up circuit for receiving a clock signal of a current stage and controlling the scanning signal output terminal to output of a high level scanning signal according to the clock signal of the current stage; a transmission circuit, connected to the pull-up circuit for outputting a high level stage transmission signal of a current stage;
a pull-up control circuit, connected to the transmission circuit and receiving a stage transmission signal of a previous stage for charging the pull-up control signal point to pull up the potential of the pull-up control signal point to a high level;a pull-down maintenance circuit connected to the pull-up control circuit, the first voltage terminal and the second voltage terminal and receiving a high voltage direct current voltage, for maintaining the low level of the pull-up control signal point, and the low level of the scanning signal outputted from the scanning signal output terminal; a bootstrap circuit for raising the potential of the pull-up control signal point; a pull-down circuit connected to the transmission circuit, the pull-down maintenance circuit, and the first voltage terminal, for receiving a stage transmission signal of a next stage and controlling the scanning signal output terminal to output the low level scanning signal in accordance with the stage transmission signal of the next stage; wherein the pull-up circuit comprises a first controllable switch, a first terminal of the first controllable switch receiving the clock signal of the current stage, a control terminal of the first controllable switch is connected to the transmission circuit and the pull-down circuit, a second terminal of the first controllable switch is connected to the transmission circuit and the scanning signal output terminal; and wherein when the scanning driving circuit is not operated, the second voltage terminal is controlled to be at high potential, and when the scanning driving circuit is operated, the second voltage terminal becomes a low potential, and the low potential is the same with the first voltage terminal; and wherein the pull-down maintenance circuit comprises fourth to ninth controllable switches, a control terminal of the fourth controllable switch is connected to a control terminal of the fifth controllable switch, a first terminal of the fourth controllable switch is connected to the pull-up control circuit, a second terminal of the fourth controllable switch is connected to the first voltage terminal, a first terminal of the fifth controllable switch is connected to the scanning signal output terminal, a second terminal of the fifth controllable switch is connected to the first voltage terminal, a second terminal of the sixth controllable switch is connected to a first terminal of the seventh controllable switch and the control terminal of the fifth controllable switch, a first terminal of the sixth controllable switch is connected to a first terminal of the eighth controllable switch and a control terminal of the eighth controllable switch and to receive the high voltage direct current voltage, a control terminal of the sixth controllable switch is connected to the second terminal of the eighth controllable switch and a first terminal of the ninth controllable switch, a control terminal of the seventh controllable switch is connected to a control terminal of the ninth controllable switch and the pull-up control circuit, a second terminal of the seventh controllable switch and a second terminal of the ninth controllable switch are both connected to the second voltage terminal.
- a first voltage terminal;
-
2. A scanning driving circuit, comprising:
-
a first voltage terminal;
a second voltage terminal;a scanning signal output terminal for outputting a high level scanning signal or a low level scanning signal;
a pull-up circuit for receiving a clock signal of a current stage and controlling the scanning signal output terminal to output of a high level scanning signal according to the clock signal of the current stage;a transmission circuit, connected to the pull-up circuit for outputting a high level stage transmission signal of a current stage; a pull-up control circuit, connected to the transmission circuit and receiving a stage transmission signal of a previous stage for charging the pull-up control signal point to pull up the potential of the pull-up control signal point to a high level; a pull-down maintenance circuit connected to the pull-up control circuit, the first voltage terminal and the second voltage terminal and receiving a high voltage direct current voltage, for maintaining the low level of the pull-up control signal point, and the low level of the scanning signal outputted from the scanning signal output terminal; a bootstrap circuit for raising the potential of the pull-up control signal point; and
a pull-down circuit connected to the transmission circuit, the pull-down maintenance circuit, and the first voltage terminal, for receiving a stage transmission signal of a next stage and controlling the scanning signal output terminal to output the low level scanning signal in accordance with the stage transmission signal of the next stage;wherein the pull-down maintenance circuit comprises fourth to ninth controllable switches, a control terminal of the fourth controllable switch is connected to a control terminal of the fifth controllable switch, a first terminal of the fourth controllable switch is connected to the pull-up control circuit, a second terminal of the fourth controllable switch is connected to the first voltage terminal, a first terminal of the fifth controllable switch is connected to the scanning signal output terminal, a second terminal of the fifth controllable switch is connected to the first voltage terminal, a second terminal of the sixth controllable switch is connected to a first terminal of the seventh controllable switch and the control terminal of the fifth controllable switch, a first terminal of the sixth controllable switch is connected to a first terminal of the eighth controllable switch and a control terminal of the eighth controllable switch and to receive the high voltage direct current voltage, a control terminal of the sixth controllable switch is connected to the second terminal of the eighth controllable switch and a first terminal of the ninth controllable switch, a control terminal of the seventh controllable switch is connected to a control terminal of the ninth controllable switch and the pull-up control circuit, a second terminal of the seventh controllable switch and a second terminal of the ninth controllable switch are both connected to the second voltage terminal. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
-
-
10. A display apparatus, wherein the display apparatus comprises a scanning driving circuit, the scanning driving circuit comprising:
- a first voltage terminal;
a second voltage terminal;
a scanning signal output terminal for outputting a high level scanning signal or a low level scanning signal;
a pull-up circuit for receiving a clock signal of a current stage and controlling the scanning signal output terminal to output of a high level scanning signal according to the clock signal of the current stage;a transmission circuit, connected to the pull-up circuit for outputting a high level stage transmission signal of a current stage; a pull-up control circuit, connected to the transmission circuit and receiving a stage transmission signal of a previous stage for charging the pull-up control signal point to pull up the potential of the pull-up control signal point to a high level; a pull-down maintenance circuit connected to the pull-up control circuit, the first voltage terminal and the second voltage terminal and receiving a high voltage direct current voltage, for maintaining the low level of the pull-up control signal point, and the low level of the scanning signal outputted from the scanning signal output terminal; a bootstrap circuit for raising the potential of the pull-up control signal point; and
a pull-down circuit connected to the transmission circuit, the pull-down maintenance circuit, and the first voltage terminal, for receiving a stage transmission signal of a next stage and controlling the scanning signal output terminal to output the low level scanning signal in accordance with the stage transmission signal of the next stage;wherein the pull-down maintenance circuit comprises fourth to ninth controllable switches, a control terminal of the fourth controllable switch is connected to a control terminal of the fifth controllable switch, a first terminal of the fourth controllable switch is connected to the pull-up control circuit, a second terminal of the fourth controllable switch is connected to the first voltage terminal, a first terminal of the fifth controllable switch is connected to the scanning signal output terminal, a second terminal of the fifth controllable switch is connected to the first voltage terminal, a second terminal of the sixth controllable switch is connected to a first terminal of the seventh controllable switch and the control terminal of the fifth controllable switch, a first terminal of the sixth controllable switch is connected to a first terminal of the eighth controllable switch and a control terminal of the eighth controllable switch and to receive the high voltage direct current voltage, a control terminal of the sixth controllable switch is connected to the second terminal of the eighth controllable switch and a first terminal of the ninth controllable switch, a control terminal of the seventh controllable switch is connected to a control terminal of the ninth controllable switch and the pull-up control circuit, a second terminal of the seventh controllable switch and a second terminal of the ninth controllable switch are both connected to the second voltage terminal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
- a first voltage terminal;
Specification