Device for controlling the gate drive voltage in liquid crystal display and influencing the turn-on voltage to have a similar ripple to a turn-off voltage

1. A device for controlling the gate drive voltage in a liquid crystal display, comprising:

a turn-on voltage output terminal and a turn-off voltage output terminal for outputting, respectively, a turn-on voltage and a turn-off voltage to a gate drive circuit; and

a control circuit,

wherein the control circuit is coupled with the turn-on voltage output terminal and exerts an influence on the turn-on voltage so that the turn-on voltage has a ripple similar to that of the turn-off voltage;

wherein the control circuit is provided between the turn-on voltage output terminal and the turn-off voltage output terminal to couple them together, one end of the control circuit is directly electrically connected with both the turn-on voltage output terminal and the gate drive circuit, and the other end of the control circuit is directly electrically connected with both the turn-off voltage output terminal and the gate drive circuit.

2. The device for controlling the gate drive voltage in a liquid crystal display according to claim 1 , wherein the control circuit comprises a capacitor.

3. The device for controlling the gate drive voltage in a liquid crystal display according to claim 1 , wherein the control circuit is a RC circuit.

4. A device for controlling the gate drive voltage in a liquid crystal display, comprising:

a turn-on voltage output terminal and a turn-off voltage output terminal for outputting, respectively, a turn-on voltage and a turn-off voltage to a gate drive circuit;

a control circuit,

wherein the control circuit is coupled with the turn-on voltage output terminal and exerts an influence on the turn-on voltage so that the turn-on voltage has a ripple similar to that of the turn-off voltage; and

a common voltage output terminal for outputting a common voltage, wherein the common voltage has a ripple similar to that of the turn-off voltage during entire operation of the device;

wherein the control circuit is provided between the turn-on voltage output terminal and the common voltage output terminal to couple them together, one end of the control circuit is directly connected with both the turn-on voltage output terminal and the gate drive circuit, and the other end of the control circuit is directly connected with both the common voltage output terminal and the gate drive circuit.

5. The device for controlling the gate drive voltage in a liquid crystal display according to claim 4 , wherein the control circuit comprises a capacitor.

6. The device for controlling the gate drive voltage in a liquid crystal display according to claim 4 , wherein the control circuit is a RC circuit.

7. A liquid crystal display including a device for controlling the gate drive voltage comprising:

a turn-on voltage output terminal and a turn-off voltage output terminal for outputting, respectively, a turn-on voltage and a turn-off voltage to a gate drive circuit; and

a control circuit,

wherein the control circuit is coupled with the turn-on voltage output terminal and exerts an influence on the turn-on voltage so that the turn-on voltage has a ripple similar to that of the turn-off voltage;

wherein the control circuit is provided between the turn-on voltage output terminal and the turn-off voltage output terminal to couple them together, one end of the control circuit is directly electrically connected with both the turn-on voltage output terminal and the gate drive circuit, and the other end of the control circuit is directly electrically connected with both the turn-off voltage output terminal and the gate drive circuit.

8. The liquid crystal display according to claim 7 , wherein the control circuit comprises a capacitor.

9. The liquid crystal display according to claim 7 , wherein the control circuit is a RC circuit.