Gate driving circuit and driving method
View Patent ↗The present disclosure provides a gate driver circuit and a driving method. The circuit comprises multi-stage GOA circuits, an Nth stage GOA circuit of which comprises: a charge unit, electrically connected between an (N−1)th gate line and an energy storage unit, and used for pre-charging the energy storage unit according to the signal of the (N−1)th gate line to obtain a voltage; a driver unit used for pulling up the signal of the Nth gate line to a pull-up voltage according to the voltage and a clock pulse signal; a first reset unit used for resetting the signal of the Nth gate line to the first reset voltage or the third reset voltage according to the signal of an (N+1) gate line and the first reset voltage or the third reset voltage; and a second reset unit used for resetting the signal of the Nth gate line to the second reset voltage according to the signal of an (N+3) gate line and the second reset voltage. In the circuit of the present disclosure, two reset units are used to achieve four-order driving for the pixel units, thus effectively solving the influence of a feed through voltage on the pixel electrode and improving the quality effect of images.
1. A gate driver circuit, comprising multi-stage gate driver on array (GOA) circuits, an Nth stage GOA circuit of which comprises: an energy storage unit;
a charge unit, electrically connected between an (N−1)th gate line and the energy storage unit, and used for pre-charging the energy storage unit according to the signal of the (N−1)th gate line to obtain a voltage;
a driver unit, electrically connected to a dock output line and an Nth gate line, and used for pulling up the signal of the Nth gate line to a pull-up voltage according to the voltage and a dock pulse signal;
a first reset unit, electrically connected between the energy storage unit and a first reset voltage or a third reset voltage, and used for resetting the signal of the Nth gate line to the first reset voltage or the third reset voltage according to the signal of an (N+1) gate line and the first reset voltage or the third reset voltage; and
a second reset unit, electrically connected between an Nth gate line and a second reset voltage, and used for resetting the signal of the Nth gate line to the second reset voltage according to the signal of an (N+3) gate line and the second reset voltage; wherein
when the gate line connected with the Nth stage of GOA circuit is negative, the first reset unit resets the signal of the Nth gate line to the first reset voltage according to the signal of the (N+1) gate line and the first reset voltage, a negative voltage difference existing between the first reset voltage and the second reset voltage;
when the gate line connected with the Nth stage of GOA circuit is positive, the first reset unit resets the signal of the Nth gate line to the third reset voltage according to the signal of the (N+1) gate line and the third reset voltage, a positive voltage difference existing between the third reset voltage and the second reset voltage.
2. The gate driver circuit according to claim 1 , wherein the second reset unit is a transistor provided with a gate, a first source/drain and a second source/drain, the gate being electrically connected with the (N+3) gate line, and the first source/drain and the second source/drain being electrically connected with the N gate line and the second reset voltage respectively.
3. The gate driver circuit according to claim 1 , wherein the second reset unit is a transistor provided with a gate, a first source/drain and a second source/drain, the gate being electrically connected with the (N+3) gate line, and the first source/drain and the second source/drain being electrically connected with the N gate line and the second reset voltage respectively.
4. The gate driver circuit according to claim 1 , wherein the second reset unit is a transistor provided with a gate, a first source/drain and a second source/drain, the gate being electrically connected with the (N+3) gate line, and the first source/drain and the second source/drain being electrically connected with the N gate line and the second reset voltage respectively.
5. The gate driver circuit according to claim 2 , wherein the first reset unit comprises a first transistor and a second transistor, each being provided with a gate, a first source/drain and a second source/drain,
the gates of the first transistor and the second transistor are electrically connected to each other and connected with the (N+1)th gate line,
the first source/drain of the first transistor is electrically connected with the first end of the energy storage unit, and the first source/drain of the second transistor is electrically connected with the second end of the energy storage unit, and
the second sources/drains of the first transistor and the second transistor are electrically connected to each other and electrically connected with the first reset voltage or the third reset voltage.
6. The gate driver circuit according to claim 5 , wherein the charge unit is a transistor provided with a gate, a first source/drain and a second source/drain,
the gate and the first source/drain of the charge unit are electrically connected with the (N−1)th gate line, and the second source/drain thereof is electrically connected with the first end of the energy storage unit.
7. The gate driver circuit according to claim 6 , wherein the driver unit is a transistor provided with a gate, a first source/drain and a second source/drain,
the first source/drain of the driver unit is electrically connected with the clock output line, the gate thereof is electrically connected with the first end of the energy storage unit, and the second source/drain thereof is electrically connected with the Nth gate line and the second end of the energy storage unit.
8. A gate driver circuit, comprising multi-stage gate driver on array (GOA) circuits, an Nth stage GOA circuit of which comprises: an energy storage unit;
a charge unit, electrically connected between an (N−1)th gate line and the energy storage unit, and used for pre-charging the energy storage unit according to the signal of the (N−1)th gate line to obtain a voltage;
a driver unit, electrically connected to a clock output line and an Nth gate line, and used for pulling up the signal of the Nth gate line to a pull-up voltage according to the voltage and a clock pulse signal;
a first reset unit, electrically connected between the energy storage unit and a first reset voltage or a third reset voltage, and used for resetting the signal of the Nth gate line to the first reset voltage or the third reset voltage according to the signal of an (N+1) gate line and the first reset voltage or the third reset voltage; and
a second reset unit, electrically connected between an Nth gate line and a second reset voltage, and used for resetting the signal of the Nth gate line to the second reset voltage according to the signal of an (N+3) gate line and the second reset voltage; wherein
when the gate line connected with the Nth stage of GOA circuit is negative, the first reset unit resets the signal of the Nth gate line to the first reset voltage according to the signal of the (N+1) gate line and the first reset voltage, a negative voltage difference existing between the first reset voltage and the second reset voltage;
when the gate line connected with the Nth stage of GOA circuit is positive, the first reset unit resets the signal of the Nth gate line to the third reset voltage according to the signal of the (N+1) gate line and the third reset voltage, a positive voltage difference existing between the third reset voltage and the second reset voltage.