CN114242018A

CN114242018A - GOA (Gate driver on array) driving circuit, GOA driving method and display panel

Info

Publication number: CN114242018A
Application number: CN202111630509.0A
Authority: CN
Inventors: 傅晓立; 宛永琪; 汤冬峰
Original assignee: Shenzhen Skyworth RGB Electronics Co Ltd
Current assignee: Shenzhen Skyworth RGB Electronics Co Ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-03-25
Anticipated expiration: 2041-12-28
Also published as: CN114242018B

Abstract

The invention discloses a GOA (gate driver on array) driving circuit, a GOA circuit driving method and a display panel, wherein the GOA driving circuit comprises a first GOA unit circuit, a second GOA unit circuit, a control signal input end, a first switch circuit, a second switch circuit and a controller, wherein the input end of the first switch circuit is connected with the control signal input end, and the output end of the first switch circuit is connected with the first GOA unit circuit; the first end of the second switch circuit is also connected with the input end of the control signal, and the output end of the second switch circuit is connected with the second GOA unit circuit; the controller alternately outputs a first on signal, a first off signal, a second on signal and a second off signal, controls the first switch circuit and the second switch circuit to be alternately turned on, and accordingly the first GOA unit circuit and the second GOA unit circuit alternately receive control signals to alternately output driving signals to drive the display area to display. The invention obviously reduces the temperature of the WOA area and improves the display stability of the display panel.

Description

GOA (Gate driver on array) driving circuit, GOA driving method and display panel

Technical Field

The invention relates to the field of liquid crystal display, in particular to a GOA (Gate driver on array) driving circuit, a GOA circuit driving method and a display panel.

Background

With the development of technology, the resolution and the refresh rate of the display panel are higher and higher, the panel size is larger and larger, the in-plane load is also increased, and accordingly, the current of the GOA (Gate drive on Array) signal in the panel is larger and larger.

Referring to fig. 1, after amplification of the GOA trace, the GOA signals mainly include a start scan signal ST, high level signals LC1, LC2, low level signals VSS1, VSS2, and row scan clock signals CK1, ck2.. CK6 (the row scan clock signals include a plurality of clock signals, which are only illustrated as 6 clock signals).

After the GOA signal of the existing panel is output by a TCON (timing controller) board or a main board, the GOA signal is divided into two paths, i.e., left and right paths, through a printed circuit board and enters the GOA driving circuits on the left and right sides of the display panel, so that the GOA circuits on the left and right sides work bilaterally and output a line scanning driving signal.

However, in a WOA (Wire On Array) area of the panel, the GOA signal traces are very dense, and especially at two corners, the current of the GOA signal itself flows through the generated heat, and then the ambient temperature of other traces is superimposed, so that the temperature of the area is much higher than that of other places.

If the temperature of the WOA region is too high, the characteristics of the in-plane thin film transistor drift, and the operation of the GOA cell is abnormal, a display defect of a full-screen horizontal line as shown in fig. 2 occurs.

Disclosure of Invention

The invention mainly aims to provide a GOA driving circuit, a GOA circuit driving method and a display panel, and aims to solve the problem that poor display is caused by overhigh temperature of a WOA area of the display panel.

In order to achieve the above object, the present invention provides a GOA driving circuit for driving a display panel to operate, the GOA driving circuit including a first GOA unit circuit and a second GOA unit circuit disposed on two opposite sides of a display area of the display panel, the GOA driving circuit further including:

at least one control signal input for inputting a control signal;

a controller for outputting a first turn-on signal and a first turn-off signal at an Nth frame number and outputting a second turn-on signal and a second turn-off signal at an Mth frame number; wherein, N and M have a difference of a preset frame number, and M and N are positive integers;

the controlled end of the first switch circuit is connected with the controller, the input end of the first switch circuit is connected with the control signal input end, and the output end of the first switch circuit is connected with the first GOA unit circuit;

the first switch circuit is used for being switched on when receiving the first switching-on signal, so that the first GOA unit circuit receives the control signal and outputs a driving signal to drive a display area to display according to the control signal; the first switch circuit is further configured to turn off when receiving the second turn-off signal, so that the first GOA unit circuit stops working;

the controlled end of the second switch circuit is connected with the controller, the input end of the second switch circuit is connected with the control signal input end, and the output end of the second switch circuit is connected with the second GOA unit circuit;

the second switch circuit is used for being switched on after receiving the second conducting signal, so that the second GOA unit circuit receives the control signal and outputs a driving signal to drive a display area to display according to the control signal; and the second switch circuit is also used for turning off when receiving the first turn-off signal so as to stop the second GOA unit circuit.

Optionally, the control signal is a line scan clock signal; the GOA driving circuit comprises a plurality of control signal input ends, a plurality of first switch circuits and a plurality of second switch circuits; the first switch circuit and the second switch circuit respectively correspond to the control signal input end;

the input end of the first switch circuit is connected with the corresponding control signal input end and is used for receiving the corresponding line scanning clock signal;

the input end of the second switch circuit is also connected with the corresponding control signal input ends and is used for receiving the corresponding line scanning clock signals.

Optionally, the first switch circuit includes a first switch tube, a control end of the first switch tube is connected to a controlled end of the first switch circuit, an input end of the first switch tube is connected to an input end of the first switch circuit, and an output end of the first switch tube is connected to an output end of the first switch circuit;

the second switch circuit comprises a second switch tube, the control end of the second switch tube is connected with the controlled end of the second switch circuit, the input end of the second switch tube is connected with the input end of the second switch circuit, and the output end of the second switch tube is connected with the output end of the second switch circuit.

Optionally, the first switching tube and the second switching tube are both thin film transistors.

Optionally, the control signal is a start scan signal.

Optionally, the first switching circuit comprises a third switching tube; the control end of the third switching tube is connected with the controlled end of the first switching circuit, the input end of the third switching tube is connected with the input end of the first switching circuit, and the output end of the third switching tube is connected with the output end of the first switching circuit;

the second switch circuit comprises a fourth switch tube, the control end of the fourth switch tube is connected with the controlled end of the second switch circuit, the input end of the fourth switch tube is connected with the input end of the second switch circuit, and the output end of the fourth switch tube is connected with the output end of the second switch circuit.

Optionally, the GOA driving circuit further includes a level switching circuit; the input end of the level switching circuit is connected with the control, the first output end of the level switching circuit is connected with the controlled end of the first switch circuit, and the second output end of the level switching circuit is connected with the controlled end of the second switch circuit;

the level switching circuit is used for adjusting the levels of the first conducting signal, the first turn-off signal, the second conducting signal and the second turn-off signal according to the control of the controller.

In addition, the present invention also provides a method for driving a GOA circuit, which is applied to the above-mentioned GOA driving circuit, and comprises the following steps:

outputting a first conduction signal when the Nth frame number is reached, controlling the first switch circuit to be conducted so as to output the received control signal to the first GOA unit circuit, and enabling the first GOA unit circuit to output a driving signal to drive a display area to display; outputting a first turn-off signal to control the second switch circuit to turn off so as to stop the second GOA unit circuit;

outputting a second conducting signal when the number of frames is Mth, controlling the second switch circuit to be conducted so as to output the received control signal to the second GOA unit circuit, and enabling the second GOA unit circuit to output a driving signal to drive a display area to display; outputting a second turn-off signal to control the first switch circuit to turn off so as to stop the first GOA unit circuit;

wherein, the difference between N and M is a preset frame number.

Optionally, the preset frame number is 1 frame.

Optionally, the first preset frame number is an odd frame, and the second preset frame number is an even frame.

In addition, in order to achieve the above object, the present invention further provides a display panel including a display area and a GOA driving circuit for driving the display area to display, wherein the GOA driving circuit is configured as the above-mentioned GOA driving circuit.

The invention provides a GOA driving circuit, a GOA circuit driving method and a display panel.A first switch circuit is arranged between a control signal input end and a first GOA unit circuit; the second switch circuit is arranged between the control signal input end and the second GOA unit circuit; when the controller outputs a first on signal and a first off signal during the Nth frame, the first GOA unit circuit receives the control signal and starts working, and the second GOA unit circuit stops working when the second GOA unit circuit cannot receive the control signal; when the controller outputs the second on and off signals during the mth frame, the second GOA unit circuit starts to work after receiving the control signal, and the first GOA unit circuit stops working without receiving the control signal. And the difference between M and N is a preset frame number, so that the first GOA unit circuit and the second GOA unit circuit are controlled to alternately output driving signals by controlling the first switch circuit and the second switch circuit to alternately work, and the pixel units of the display area are driven to continuously work. Because the first switch circuit or the second switch circuit is switched on alternately, the GOA signal currents in the WOA areas on the two sides of the panel are switched on alternately, so that the heat generated by the GOA signal on each side is greatly reduced, the temperature of the WOA area is reduced, and the display stability of the display panel is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic view of a WOA area and an enlarged schematic view of two-sided GOA signal routing;

FIG. 2 is a schematic diagram illustrating an abnormal display of the display panel caused by an excessive temperature in the WOA region;

fig. 3 is a schematic functional block diagram of a GOA driver circuit according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of dual-side driving of a conventional GOA circuit;

FIG. 5 is a schematic diagram of a conventional GOA circuit showing the row scan clock signal current;

FIG. 6 is a schematic diagram illustrating a GOA driving circuit according to an embodiment of the present invention driving alternately left and right frames;

FIG. 7 is a schematic diagram of the current of the GOA driving circuit according to an embodiment of the present invention for alternately driving the line scan clock signals left and right according to frames;

fig. 8 is a schematic circuit diagram of a GOA driver circuit according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of alternative driving voltages per frame for another embodiment of a GOA driving circuit according to the present invention;

fig. 10 is a schematic circuit diagram of a GOA driver circuit according to another embodiment of the present invention;

fig. 11 is a flowchart illustrating a driving method of a GOA circuit according to an embodiment of the present invention.

The objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	First GOA unit circuit	ST	Initial scanning signal
20	Second GOA unit circuit	Q1	First switch tube
				30	First switch circuit	Q2	Second switch tube
40	Second switch circuit	Q3	Third switch tube
				50	Control signal input terminal	Q4	Fourth switch tube
CK1～CK6	Line scan clock signal

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 3, in an embodiment of the present invention, the GOA driving circuit includes a first GOA unit circuit 10 and a second GOA unit circuit 20 disposed on two opposite sides of a display area of a display panel, and further includes:

at least one control signal input 50, the control signal input 50 for inputting a control signal;

a controller (not shown) for outputting a first turn-on signal and a first turn-off signal at an nth frame number and outputting a second turn-on signal and a second turn-off signal at an mth frame number; wherein, N and M have a difference of a preset frame number, and M and N are positive integers;

at least one first switch circuit 30, wherein a controlled terminal of the first switch circuit 30 is connected to the controller, an input terminal thereof is connected to the control signal input terminal 50, and an output terminal thereof is connected to the first GOA unit circuit 10;

the first switch circuit 30 is configured to be turned on when receiving the first turn-on signal, so that the first GOA unit circuit 10 receives the control signal, and outputs a driving signal according to the control signal to drive a display area to display; the first switch circuit 30 is further configured to turn off when receiving the second turn-off signal, so as to stop the first GOA unit circuit 10 from operating;

at least one second switch circuit 40, wherein a controlled terminal of the second switch circuit 40 is connected to the controller, an input terminal thereof is connected to the control signal input terminal 50, and an output terminal thereof is connected to the second GOA unit circuit 20; the second switch circuit 40 is configured to be turned on when receiving the second turn-on signal, so that the second GOA unit circuit 20 receives the control signal, and outputs a driving signal according to the control signal to drive a display area to display; the second switch circuit 40 is further configured to turn off when receiving the first turn-off signal, so as to stop the operation of the second GOA unit circuit 20.

It can be understood that the display area of the display panel is provided with a pixel array, the left and right sides of the display area are respectively provided with a line scanning driving circuit, and a line scanning driving signal is output according to the GOA signal to display by the bilateral driving pixel array. Referring to fig. 4, taking the nth frame and the (N + 1) th frame as examples, it can be seen that the bilateral driving method is adopted from the 1 st row to the nth row.

In the bilateral driving mode, as shown in fig. 5, the current waveform diagrams of the horizontal scanning clock signals on the left and right sides of the display area are shown, and still taking the nth frame and the N +1 th frame as an example, it can be seen that in each frame, the clock signal current flows through the left and right sides greatly. Therefore, when the line scan driving circuits on the left and right sides operate, the GOA signals on both sides generate large heat, and particularly, the temperature of the WOA area is easily too high as the current of each clock signal trace is increased. For example, in 65inch, 8K, 120HZ panels, the WOA region temperature in the normal temperature operation mode often exceeds 50 ℃, referring to the data in table 1. If under heavy load, the temperature will be higher, even up to 65 ℃. At such WOA temperature, the panel often enters overcurrent protection due to too high GOA temperature and too high GOA current, or display abnormality such as poor display of the full-screen horizontal line shown in fig. 2 occurs.

Table 1:

and (3) testing conditions are as follows: 65inch 8K 120HZ panel, running pattern at room temperature, thermal imager, backlight off, 6CK 1G1D panel, VGH 28V.

In this embodiment, the control signal input terminal 50 is configured to input the control signal, and the control signal may be one or more of the GOA signals, for example, a line scan clock signal or a start scan signal, and may be specifically set according to an actual circuit. The first and second

GOA unit circuits

10 and 20 are respectively disposed at the left and right sides of the display area, and are respectively connected to the control signal input terminal 50 through the first and

second switch circuits

30 and 40. The preset frame number needs to be set in combination with an actual circuit and a display effect, and since the human eye recognition time is tens of milliseconds and the refresh time of one frame is about tens of milliseconds, the preset frame number also needs to consider the display effect during setting.

The first switch circuit 30 and the second switch circuit 40 are alternately turned on, specifically, at the nth frame number, the first switch circuit 30 is turned on, and the second switch circuit 40 is turned off; at the Mth frame, the first switch circuit 30 is turned off, the second switch circuit 40 is turned on, and M and N are positive integers. Taking the preset frame number as 1 frame as an example, when the frame number is 1, the first switch circuit 30 is turned on, and the second switch circuit 40 is turned off, so that the first GOA unit circuit 10 receives the control signal and outputs the driving signal; at this time, since the control signal of the second GOA unit circuit 20 is cut off, that is, no current of the control signal flows, no heat is generated in the corresponding GOA region; in frame 2, the second switch circuit 40 is turned on, and the first switch circuit 30 is turned off, so that the second GOA unit circuit 20 receives the control signal and outputs a driving signal; at this time, since the control signal of the first GOA unit circuit 10 is cut off, that is, no current of the control signal flows, no heat is generated in the corresponding GOA region; in the 3 rd frame, the first switch circuit 30 is turned on and the second switch circuit 40 is turned off; in the 4 th frame, the second switch circuit 40 is turned on and the first switch circuit 30 is turned off, and this is repeated and alternated.

Referring to fig. 6, if the switching circuit corresponding to the unit circuit driven by the left GOA in the nth frame is turned on, the left side performs scanning, and the switching circuit corresponding to the unit circuit driven by the right GOA in the N +1 th frame is turned on, the right side performs scanning, so that the left and right sides are switched. Correspondingly, referring to fig. 7, taking the control signal as the line scan clock signal (only CK1-CK6 as an example), during the nth frame, the left side generates a current waveform, the right side does not generate current, and at this time, the right side does not generate heat; in the (N + 1) th frame, only the right side generates a current waveform, the left side does not generate current, and the right side does not generate heat. So that the heat quantity of the WOA areas on the left side and the right side is greatly reduced, and theoretically, half of the heat quantity can be reduced.

According to the scheme, the first switch circuit 30 and the second switch circuit 40 are controlled to be alternately conducted, so that the first GOA unit circuit 10 and the second GOA unit circuit 20 are controlled to alternately output driving signals, and the pixel units of the display area are driven to continuously work. Because the first switch circuit 30 or the second switch circuit 40 is alternatively conducted, the GOA signal currents in the WOA areas on both sides of the panel are alternatively conducted, so that the heat generated by the GOA signal on each side is greatly reduced, the temperature of the WOA area is reduced, and the display stability is greatly improved.

Further, referring to fig. 8, the control signal is a line scan clock signal; the GOA driving circuit comprises a plurality of the control signal input terminals 50, a plurality of the first switch circuits 30 and a plurality of the second switch circuits 40; the first switch circuit 30 and the second switch circuit 40 correspond to the control signal input end 50 respectively;

the input end of the first switch circuit 30 is connected to the corresponding control signal input end 50, and is configured to receive the corresponding line scan clock signal;

the input terminals of the second switch circuit 40 are also connected to the corresponding control signal input terminals 50 for receiving the corresponding line scan clock signals.

It is understood that the number of the line scan clock signals is plural, and the number of the control signal input terminals 50, the first switch circuits 30, and the second switch circuits 40 is equal to the number of the line scans. Fig. 8 illustrates the line scan clock signal as 6 clock signals, which are CK1, CK2, CK3, CK4, CK5, and CK 6; 6 control signal input ends 50 are also used for inputting CK1-CK 6; the number of the first switch circuits 30 and the second switch circuits 40 is also 6, and the first switch circuits are respectively used for receiving and transmitting CK1-CK6 to the first GOA unit circuit 10 and the second GOA unit circuit 20.

The controlled terminals of the first switch circuit 30 may be connected together to synchronously receive a signal T1 for controlling the first switch circuit, specifically, when T1 is high, it may be a first on signal, and when T1 is low, it may be a second off signal. The controlled terminals of the second switch circuit 40 may be connected together to synchronously receive a signal T2 for controlling the second switch circuit, which may be a second on signal when T2 is high, and may be a first off signal when T2 is low.

In this embodiment, the plurality of first switch circuits 30 synchronously receive the first conducting signal and are turned on simultaneously to synchronously transmit the plurality of line scanning clock signals to the first GOA unit circuit 10; the second off signal may also be received synchronously while the transmission of the plurality of line scan clock signals is stopped. The second switch circuits 40 synchronously receive the second conducting signals and are simultaneously turned on to synchronously transmit the line scanning clock signals to the second GOA unit circuit 20; the first off signal may also be received synchronously while the transmission of the plurality of line scan clock signals is stopped. So that the first GOA unit circuit 10 and the second GOA unit circuit 20 synchronously receive and stop receiving the plurality of line scan clock signals.

In this embodiment, the first on signal and the first off signal are synchronized, and the second off signal and the second on signal are synchronized. When the first switch unit 30 or the second switch circuit 40 is turned off, the line scan clock signal cannot be input to the corresponding GOA unit circuit, that is, the corresponding GOA unit circuit cannot receive the signal, and the GOA circuit does not have the line scan clock signal current. However, the switch circuit on the other side is turned on, and accordingly, each stage of the GOA unit can receive the line scanning clock signal, and the display area can still be driven. Thereby greatly reducing the heat generated due to the large current of the line scan clock signal.

Further, the first switch circuit 30 includes a first switch tube Q1, a control terminal of the first switch tube Q1 is connected to the controlled terminal of the first switch circuit 30, an input terminal of the first switch tube Q1 is connected to the input terminal of the first switch circuit 30, and an output terminal of the first switch tube Q1 is connected to the output terminal of the first switch circuit 30;

the second switch circuit 40 includes a second switch tube Q2, a control terminal of the second switch tube Q2 is connected to the controlled terminal of the second switch circuit 40, an input terminal of the second switch tube Q2 is connected to the input terminal of the second switch circuit 40, and an output terminal of the second switch tube Q2 is connected to the output terminal of the second switch circuit 40.

When the signal T1 is at a high level and the signal T2 is at a low level, the first switch Q1 is turned on to transmit the horizontal scanning clock signal to the first GOA unit 10, and the second switch Q2 is turned off, so that the second GOA unit circuit 20 does not receive the horizontal scanning clock signal and stops working; when the signal T1 is at a low level and the signal T2 is at a high level, the second switch Q2 is turned on to transmit the horizontal scanning clock signal to the second GOA unit circuit 20, and the first switch Q1 is turned off, so that the first GOA unit 10 does not receive the horizontal scanning clock signal and stops operating. Thereby realizing the alternate work of the two GOA units.

Further, the control signal is a start scan signal ST. The start scanning signal is a start signal for frame transmission, and each GOA unit circuit will start working after receiving the start scanning signal ST of each frame, and output the line scanning signal of the frame to drive the display area to scan. If the GOA unit circuit does not receive the start scanning signal ST, it will not operate. With reference to fig. 9, the control procedure of the present embodiment for frame alternation is as follows: in the frame 1, when the ST signal is coming, the T1 is controlled to be high and the T2 is controlled to be low, at this time, the third transistor Q3 is turned on and the fourth transistor Q4 is turned off, so that the second GOA unit circuit 20 stops working and no heat is generated when no current flows in the corresponding region. In the frame 2 (frame 2), when the ST signal is asserted, the T3 is controlled to be low and the T4 is controlled to be high, at this time, the third transistor Q3 is turned off and the fourth transistor Q4 is turned on, so that the first GOA unit circuit 10 stops operating and no heat is generated when no current flows in the corresponding region. By repeating this alternation, the temperatures of the WOA regions on the left and right sides are greatly reduced.

In this embodiment, the first GOA unit circuit 10 and the second GOA unit circuit 20 receive the start scanning signal ST alternately, so that the two GOA unit circuits work alternately, and the signals of the two corresponding WOA areas are also turned on alternately to generate heat alternately, thereby greatly reducing the temperature of the corresponding WOA areas.

Further, referring to fig. 10, the first switching circuit 30 includes a third switching tube Q3; a control terminal of the third switch tube Q3 is connected to the controlled terminal of the first switch circuit 30, an input terminal of the third switch tube Q3 is connected to the input terminal of the first switch circuit 30, and an output terminal of the third switch tube Q3 is connected to the output terminal of the first switch circuit 30;

the second switch circuit 40 comprises a fourth switch tube Q4, a control end of the fourth switch tube Q4 is connected with a controlled end of the second switch circuit 40, an input end of the fourth switch tube Q4 is connected with an input end of the second switch circuit 40, and an output end of the fourth switch tube Q4 is connected with an output end of the second switch circuit 40.

When the signal T1 is at a high level and the signal T2 is at a low level, the third transistor Q3 is turned on to transmit the start scanning signal ST to the first GOA unit 10, and the fourth transistor Q4 is turned off, so that the second GOA unit circuit 20 does not receive the start scanning signal ST and stops working; when the signal T1 is at a low level and the signal T2 is at a high level, the second switch Q2 is turned on to transmit the start scanning signal ST to the second GOA unit circuit 20, and the fourth switch Q4 is turned off, so that the first GOA unit 10 stops operating without receiving the start scanning signal ST. Therefore, the two GOA unit circuits can work alternately.

Furthermore, the first switch tube Q1 and the second switch tube Q2 are both thin film transistors; the types of the third switch tube Q3 and the fourth switch tube Q4 can be selected according to the actual circuit; the first switching tube Q1, the second switching tube Q2, the third switching tube Q3 and the fourth switching tube Q4 may all be thin film transistors. The grid electrode of the thin film transistor is the control end of the switch tube, the drain electrode of the thin film transistor is the input end of the switch tube, and the source electrode of the thin film transistor is the output end of the switch tube.

Further, the GOA driving circuit further includes a level switching circuit (not shown); the input end of the level switching circuit is connected with the control, the first output end of the level switching circuit is connected with the controlled end of the first switch circuit 30, and the second output end of the level switching circuit is connected with the controlled end of the second switch circuit 40; the level switching circuit is used for adjusting the levels of the first conducting signal, the first turn-off signal, the second conducting signal and the second turn-off signal according to the control of the controller.

The Level switching circuit may include an LS (Level shift) chip connection, the LS chip may be connected to the controller, the output ports output a signal T1 and a signal T2, respectively, and when receiving a first turn-on signal that the controller outputs to control the first switch circuit 30 to turn on and a second turn-off signal that the controller outputs to control the first switch circuit 30 to turn on and turn off, the signals T1 are a high Level and a low Level that are sufficient to drive the first switch tube Q1 or the third switch tube Q3 to smoothly and quickly turn on and off, respectively; when receiving the second on signal for controlling the second switch circuit 40 to be turned on and the first off signal for controlling the second switch circuit 40 to be turned off, which are output by the controller, the signal T2 is a high level and a low level respectively, which are sufficient to drive the second switch tube Q2 or the fourth switch tube Q4 to be smoothly and rapidly turned on and off. Therefore, the speed of the first switch circuit 30 and the second switch circuit 40 is fast enough when the on and off states are switched, and the two GOA units can quickly receive corresponding control signals, so that the switching speed of the GOA unit circuits on the left and the right sides is fast enough when the GOA unit circuits alternately work, and the display effect of pictures cannot be influenced.

The present invention further provides a driving method for a GOA circuit, which is applied to a GOA driving circuit, and the structure of the GOA driving circuit can refer to the above-mentioned embodiment, referring to fig. 11, in an embodiment, the driving method for a GOA circuit includes the following steps:

step S10, when the nth frame number is reached, outputting a first on signal to control the first switch circuit to be turned on, so as to output the received control signal to the first GOA unit circuit, and enabling the first GOA unit circuit to output a driving signal to drive a display area to display; outputting a first turn-off signal to control the second switch circuit to turn off so as to stop the second GOA unit circuit;

step S20, when the mth frame number is reached, outputting a second on signal to control the second switch circuit to be turned on, so as to output the received control signal to the second GOA unit circuit, and enable the second GOA unit circuit to output a driving signal to drive a display area to display; and outputting a second turn-off signal to control the first switch circuit to turn off so as to stop the first GOA unit circuit.

In this embodiment, N and M differ by a preset number of frames, and both N and M are positive integers; the execution main body is a controller. The steps S10 and S20 are performed alternately, so as to control the first switch circuit 30 and the second switch circuit 40 to be turned on alternately, thereby controlling the first GOA unit circuit 10 and the second GOA unit circuit 20 to output the driving signals alternately, and driving the pixel units of the display area to operate continuously. Because the first switch circuit 30 or the second switch circuit 40 is alternatively conducted, the GOA signal currents in the WOA areas on both sides of the panel are alternatively conducted, so that the heat generated by the GOA signal on each side is greatly reduced, the temperature of the WOA area is reduced, and the display stability is greatly improved. When the circuit routing of a certain side is dense, the GOA unit circuit of the side can bear less scanning tasks, so that the heat of the GOA signal line of the side is reduced, and the heat of the WOA areas on the left side and the right side is more balanced.

In addition, it should be further noted that, in the GOA circuit driving method, the refinement processing and transmission process of the first GOA unit circuit 10, the second GOA unit circuit, the first switch circuit 30 and the second switch circuit 40 in the diagram can be performed with reference to the embodiment of the GOA driving circuit, which is not described herein again.

Further, the preset frame number is 1 frame.

In this embodiment, the first switch circuit 30 and the second switch circuit 40 are alternately turned on for each frame, so as to control the first GOA unit circuit 10 and the second GOA unit circuit 20 to alternately output control signals for each frame, i.e. to scan the display area left and right for each frame.

The present invention further provides a display panel, which includes a display area and a GOA driving circuit, where the GOA driving circuit is configured to drive the display area to perform display, and a structure of the GOA driving circuit may refer to the foregoing embodiments and is not described herein again. It should be understood that, since the display panel of the embodiment adopts the technical solution of the GOA driving circuit, the display panel has all the beneficial effects of the GOA driving circuit.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides a GOA drive circuit for drive display panel work, GOA drive circuit is including being used for setting up in first GOA unit circuit and the second GOA unit circuit of the relative both sides in display panel display area, its characterized in that, GOA drive circuit still includes:

at least one control signal input for inputting a control signal;

2. The GOA driver circuit of claim 1, wherein the control signal is a line scan clock signal; the GOA driving circuit comprises a plurality of control signal input ends, a plurality of first switch circuits and a plurality of second switch circuits; the first switch circuit and the second switch circuit respectively correspond to the control signal input end;

3. The GOA driving circuit according to claim 2, wherein the first switching circuit comprises a first switching tube, a control terminal of the first switching tube is connected to a controlled terminal of the first switching circuit, an input terminal of the first switching tube is connected to an input terminal of the first switching circuit, and an output terminal of the first switching tube is connected to an output terminal of the first switching circuit;

4. The GOA driving circuit as claimed in claim 3, wherein the first switching tube and the second switching tube are both thin film transistors.

5. The GOA driver circuit of claim 1, wherein the control signal is a start scan signal.

6. The GOA driving circuit according to claim 5, wherein the first switching circuit comprises a third switching tube; the control end of the third switching tube is connected with the controlled end of the first switching circuit, the input end of the third switching tube is connected with the input end of the first switching circuit, and the output end of the third switching tube is connected with the output end of the first switching circuit;

7. The GOA driving circuit according to any one of claims 1 to 6, further comprising a level switching circuit; the input end of the level switching circuit is connected with the control, the first output end of the level switching circuit is connected with the controlled end of the first switch circuit, and the second output end of the level switching circuit is connected with the controlled end of the second switch circuit;

8. A GOA circuit driving method is applied to the GOA circuit driving circuit of any one of 1-7, and the method comprises the following steps:

wherein, the difference between N and M is a preset frame number.

9. The GOA circuit driving method of claim 8, wherein the preset number of frames is 1 frame.

10. A display panel comprising a display area and a GOA driving circuit for driving the display area to display, wherein the GOA driving circuit is configured as the GOA driving circuit according to any one of claims 1 to 7.