GOA driving circuit, GOA driving method and display device

Abstract

The invention discloses a GOA driving circuit, a GOA driving method and a display device.The GOA driving circuit comprises a plurality of cascaded first GOA units, each first GOA unit is connected with a scanning line in a display area and used for outputting a scanning signal to the corresponding scanning line, and the GOA driving circuit further comprises second GOA units arranged corresponding to the first GOA units and a frame start bus; the second GOA units input driving signals to the first GOA units, the frame start bus is connected with each first GOA unit and inputs starting signals to the first GOA units, and the corresponding first GOA units are controlled to be turned on or turned off through the driving signals and the starting signals. The second GOA unit corresponding to the first GOA unit is arranged, the frame start bus is added, the second GOA unit and the frame start bus provide signals for the first GOA unit and replace a frame start signal to control starting of the first GOA unit, and free control over starting and stopping of the first GOA unit is achieved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a GOA driving circuit, a GOA driving method, and a display device. Background Art

[0002] For ordinary displays, the scanning frequency of the entire screen is fixed. However, when using a display screen (especially a mobile phone) to watch videos, a higher display frequency is required in the video display position (referred to as the dynamic area) to ensure the video effect is clear. In the nearly static display position (referred to as the static area), maintaining a high scanning frequency will only waste power.

[0003] In the current conventional GOA (Gate Driver on Array) structure, the frame start signal (STV signal) can only activate the first row of the entire GOA structure, starting from the first row and scanning and driving row by row. It is impossible to skip the previous GOA units and directly activate the subsequent ones. In other words, it is impossible to start the GOA structure from a middle row.

[0004] Currently, no effective solution has been found for the above-mentioned problems existing in the related technologies. Summary of the Invention

[0005] The present application provides a GOA driving circuit, a GOA driving method and a display device to solve the technical problem of the above-mentioned multiple display mode requirements existing in the related art.

[0006] According to one embodiment of the present application, a GOA driving circuit is provided, comprising a plurality of cascaded first GOA units, each first GOA unit being connected to a scan line in a display area for outputting a scan signal to the corresponding scan line. The GOA driving circuit further comprises a second GOA unit arranged corresponding to the first GOA unit, and a frame start bus; the second GOA unit inputs a drive signal to the first GOA unit, the frame start bus is connected to each first GOA unit, and a start signal is input to the first GOA unit, and the corresponding first GOA unit is controlled to be turned on or off by the drive signal and the start signal.

[0007] Optionally, the input end of the first GOA unit includes a first transistor (T1), a second transistor (Tx) and a third transistor (Ty); the control end of the first transistor (T1) is connected to the output end of the first GOA unit of the previous level, the first end of the first transistor (T1) is connected to the power supply voltage, and the second end is connected to a control node, and the control node is used to control the output end of the first GOA unit; the second transistor (Tx) and the third transistor (Ty) are arranged between the power supply voltage and the control node, the frame start bus inputs a start signal to the second transistor (Tx), and the second GOA unit inputs a drive signal to the third transistor (Ty).

[0008] Optionally, the second GOA unit and the first GOA unit at the same level share the same clock signal line.

[0009] According to another embodiment of the present application, a GOA driving method is provided, which is applied to the above-mentioned GOA driving circuit, and the method includes: determining a boundary between a low-frequency region and a high-frequency region, wherein the low-frequency region is a panel region requiring low-frequency display, and the high-frequency region is a panel region requiring high-frequency display; at the boundary, controlling the second GOA unit to input a driving signal to the first GOA unit, and controlling the frame start bus to input a start signal to the first GOA unit; and controlling the corresponding first GOA unit to be turned on or off through the driving signal and the start signal.

[0010] Optionally, controlling the activation of the corresponding first GOA unit through the drive signal and the start signal includes: determining a first boundary from a low-frequency region to a high-frequency region; turning on a second frame start signal to control the step-by-step activation of the second GOA unit, and controlling the second GOA unit to input a high-voltage drive signal to the corresponding first GOA unit, while controlling the frame start bus to output a low-voltage start signal, and controlling the frame start bus to output a high-voltage start signal at the first boundary to activate the first GOA unit at the first boundary.

[0011] Optionally, controlling the shutdown of the corresponding first GOA unit through the drive signal and the start signal includes: determining a second boundary from the high-frequency region to the low-frequency region; controlling the first reset signal to turn on at the second boundary, and at the same time controlling the frame start bus to output a low-voltage start signal to shut down the first GOA unit.

[0012] Optionally, the method further includes: controlling the first GOA unit to turn on in the first frame while maintaining the frame start bus to output a low-voltage start signal; for N frames after the first frame, at the boundary, controlling the corresponding first GOA unit to turn on or off through the drive signal and the start signal, where N is a positive integer; and performing cyclic scanning with the first frame and the N frames as the scanning period.

[0013] Optionally, the second frame start signal of the second GOA unit is controlled to be turned off within the first frame.

[0014] Optionally, determining the boundary between the low-frequency area and the high-frequency area includes: calculating the unit turn-on time of the second GOA unit turning on each row of pixels; obtaining the number of pixel rows in the low-frequency area and the high-frequency area, and determining the number of boundary rows between the low-frequency area and the high-frequency area; calculating the target time corresponding to the number of boundary rows according to the unit turn-on time, and using the target time as the boundary between the low-frequency area and the high-frequency area.

[0015] According to another embodiment of the present application, a display device is provided, including a display panel and the GOA driving circuit as described above, wherein the display panel and the GOA driving circuit are electrically connected.

[0016] Through the embodiment of the present application, a second GOA unit corresponding to the first GOA unit is set, and a frame start bus is added at the same time. The output of the first GOA unit provides a signal for the display area scan line, and the second GOA unit and the frame start bus provide a signal to the first GOA unit to control the opening or closing of the first GOA unit, thereby solving the problem that the startup of the traditional GOA architecture depends on the STV signal, and the STV signal only acts on the first few rows, and it is impossible to start the GOA structure from a middle row, thereby realizing free control of the start and stop of the GOA architecture. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 Schematic diagram of the GOA driving circuit structure of an embodiment of the present application; Figure 2 This is a schematic diagram of how traditional ICs achieve high frequencies in the upper half and low frequencies in the lower half. Figure 3 This is the GOA timing diagram of the traditional IC to achieve high frequency in the upper half and low frequency in the lower half; Figure 4 This is a schematic diagram of the GOA circuit structure in the prior art, which introduces a signal by adding an STV line corresponding to the partition row; Figure 5 This is a schematic diagram of dividing the panel into three scanning frequency regions in an embodiment of the present application; Figure 6 This is a diagram of the GOA circuit architecture of an embodiment of the present application; Figure 7 This is the input and Q-point architecture diagram of the traditional GOA; Figure 8 1 is a diagram of the input end and Q point structure of the first GOA unit in an embodiment of the present application; Figure 9 : is a GOA timing diagram in an embodiment of the present application; Figure 10 This is a flow chart of a GOA driving method for a display panel according to an embodiment of the present application; Figure 11 This is a schematic diagram of the structure of the second GOA unit in the embodiment of the present application; Figure 12 This is a schematic diagram of the structure of the first GOA unit used in the embodiment of the present application. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only embodiments of a part of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of this application. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0019] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0020] First embodiment: In related technologies, some chips (ICs) can start the first row of the entire GOA structure based on the frame start signal (STV signal) and terminate the GOA working process based on the reset signal (total reset signal), which can achieve different display frequencies in the upper and lower halves of the panel (high frequency in the upper half and low frequency in the lower half) to save power. However, this solution can only divide the panel into two fixed parts: the upper half with high frequency and the lower half with low frequency, and cannot achieve more refined regional control. The panel is divided into the upper and lower regions (such as Figure 2 The implementation principle of the high scanning frequency in the dynamic area and low scanning frequency in the static area shown in the figure is as follows: Reference Figure 3 The conventional GOA timing diagram shown in the figure shows that the entire panel displays normally in the first frame (the STV signal is activated, and pixels are scanned row by row starting from the first row according to the set initial frequency). However, in the second frame, at the boundary between the high-frequency and low-frequency portions, the reset signal (total reset) is activated to reset the entire GOA architecture, restoring it to its initial state. This cycle repeats over two frames. During these two frames, the high-frequency pixels are scanned twice, while the low-frequency pixels are scanned only once. Assuming the panel's initial frequency is 120Hz, the high-frequency portion remains at 120Hz, while the low-frequency portion is equivalent to half of 120Hz, or 60Hz. This allows the chip to control the upper and lower halves to have different frequencies, with the high-frequency and low-frequency portions separated by the reset signal (total reset) activation point. Since the panel does not need to maintain 120Hz throughout, display power consumption is reduced. However, the activation of the GOA architecture in this solution depends on the STV signal, which only acts on the first few rows. It is impossible to activate the GOA structure from a certain row in the middle. Therefore, the panel can only be divided into two fixed parts: the upper half with high frequency and the lower half with low frequency, and more refined regional control cannot be achieved.

[0021] If you want to start the GOA structure from a certain row in the middle, you can use the following method: Figure 4 The structure is to add an extra STV3 to a middle row for startup. Figure 4 The structure of the whole panel is fixed at the line of the additional STV3 connection, and the position cannot be automatically adjusted by software. Since the display window size and position of different video apps or websites are not uniform, it is impossible to fully achieve the effect of high refresh rate in the dynamic area of ​​the video to ensure image quality and low refresh rate in the static area to reduce power consumption. Figure 4 If each level of GOA unit is equipped with an STV signal, thousands of traces will be required, which is not practical.

[0022] Based on this, the embodiment of the present application provides a GOA driving circuit, referring to Figure 1 and Figure 6 The GOA driver circuit includes two GOA groups arranged on one side of the display area (AA area). One group includes multiple cascaded first GOA units (denoted as GOA_A), and the other group includes second GOA units (denoted as GOA_B) corresponding to the first GOA units. A frame start bus is also added. Each first GOA unit is connected to a scan line in the display area and outputs a scan signal to the corresponding scan line. In other words, the output Gout_A of GOA_A provides a signal for the display area scan line (gate line).

[0023] The driving signal Gout_B output by the second GOA unit is output to the first GOA unit of the corresponding row. The frame start bus is connected to each first GOA unit, and the start signal (STV_Total signal) is input to the first GOA unit. The corresponding first GOA unit is controlled to be turned on or off through the Gout_B signal and the STV_Total signal.

[0024] Through this embodiment, a second GOA unit corresponding to the first GOA unit is set, and a frame start bus is added at the same time. The output of the first GOA unit provides a signal for the display area scan line. The second GOA unit and the frame start bus provide a signal to the first GOA unit to control the opening or closing of the first GOA unit. This solves the problem that the startup of the traditional GOA architecture depends on the STV signal, and the STV signal only acts on the first few rows, and it is impossible to start the GOA structure from a middle row. This realizes free control of the start and stop of the GOA architecture.

[0025] This embodiment does not limit the specific architecture of GOA_A and GOA_B. This embodiment will take the 4CLK GOA architecture as an example for description.

[0026] Reference Figure 7 The input and control node (Q-point) architecture of a conventional GOA unit is shown. When the previous-stage output signal G(n-2) is transmitted to the GOA unit in this row, turning on the first transistor T1, the power supply voltage VDD pulls up the Q-point voltage. Q-point connects to the gate of the output transistor TFT (not shown), turning on the output transistor TFT to provide a signal for the scan line. If the GOA unit's operation is terminated by the reset signal "total reset" in the current frame, the GOA unit can only be activated by the STV signal in the first row of the next frame. This means that the panel can only be divided into two fixed sections: the upper half with high frequency and the lower half with low frequency.

[0027] In this embodiment, referring to Figure 8The input terminals of the first GOA unit include a first transistor T1, a second transistor Tx, and a third transistor Ty. The control terminal of the first transistor T1 (which can be the gate of the first transistor T1) is connected to the output terminal Gout_A(n-2) of the first GOA unit in the previous stage. The first terminal of the first transistor T1 is connected to the power supply voltage VDD, and the second terminal is connected to the control node Q (depending on the transistor type, the first terminal can be one of the source and drain terminals, and the second terminal can be the other of the source and drain terminals). Q is connected to the gate of the output transistor TFT. Turning on the output transistor TFT controls the output terminal of the first GOA unit to provide a signal to the scan line. The second transistor Tx and the third transistor Ty are arranged between the power supply voltage VDD and the Q point. The frame start bus inputs the start signal STV_Total to the second transistor Tx, and the second GOA unit inputs the Gout_B signal to the third transistor Ty. When the STV_Total signal and the Gout_B signal are both high, the second transistor Tx and the third transistor Ty can replace the first transistor T1 to connect VDD and the Q point together. In this way, even if the first GOA unit architecture is closed by the corresponding reset signal, it is only necessary to give the STV_Total signal high voltage when the corresponding second GOA unit has an output to turn on the corresponding first GOA unit. Since the second GOA unit is turned on row by row, the time for each row to be turned on can be calculated, so it is only necessary to output a high-voltage signal on the frame start bus at the corresponding time to start the first GOA unit in any row. The stop is achieved by the first reset signal total reset_A signal of the first GOA unit. The increase of the total reset_A signal can terminate the working process of all first GOA units. It is possible to control the opening of any first GOA unit, thereby realizing different scanning frequency displays in different areas of the panel.

[0028] In another implementation of this embodiment, the second GOA unit and the first GOA unit at the same level share the same clock signal line.

[0029] In this embodiment, since the entire second GOA unit structure is not responsible for providing signals to the display area, but is only responsible for providing signals to the first GOA unit to control the opening of the first GOA unit, the structure of the second GOA unit can be simpler than that of the first GOA unit and only requires a small number of wirings, such as Figure 6 As shown, the second GOA unit shares the clock signal (CLK1-4) with the first GOA unit, and the second GOA unit does not need to add an additional set of clock signals, thereby reducing the chip burden.

[0030] For example, the second GOA unit may adopt a relatively simple 8T1C GDL architecture, such as Figure 11As shown in the figure, the 8T1C GDL architecture consists of eight transistors (TFTs) and one capacitor (C). T1 is used for signal input; T3 is used for signal output; T7 and T4 are controlled by a second reset signal, total reset_B, for resetting the entire circuit; T2, T5, and T8 are reset control signals, ensuring continuous reset when the GOA of the current bank is not operating; and T6 disables the reset control signal when the GOA of the current bank is operating. All clock signals in this structure can be shared with the GOA_A clock signal, eliminating the need for additional clock signals. Furthermore, the TFTs and capacitors in this structure can be set relatively small to ensure the basic output waveform, minimizing wiring load and saving power.

[0031] The first GOA unit needs to ensure the display area signal output, so a relatively complex GOA architecture can be selected, such as Figure 12 The 11T1C GDL architecture includes 11 transistors (TFTs) (two T7s, two T4s, two T2s, two T6s, T1A, T2A, and T5) and one capacitor (C1). The addition of Tx and Ty increases the number of TFTs to 13. To reduce noise and ensure TFT life, this architecture uses a dual pull-down structure. LC1 and LC2 control two reset control units, which are alternately activated to ensure continuous reset of the GOA architecture during periods of inactivity.

[0032] Second embodiment: In this embodiment, a GOA driving method is provided. The GOA driving method is applied to the GOA driving circuit described in the above embodiment. Figure 10 , Figure 10 is a flow chart of a GOA driving method according to an embodiment of the present application. Figure 10 As shown, the process includes the following steps: Step S10, determining a boundary between a low-frequency region and a high-frequency region, wherein the low-frequency region is a panel region requiring low-frequency display, and the high-frequency region is a panel region requiring high-frequency display; Step S20, at the boundary, controlling the second GOA unit to input a drive signal to the first GOA unit, and controlling the frame start bus to input a frame start signal to the first GOA unit; controlling the opening or closing of the corresponding first GOA unit through the drive signal and the start signal.

[0033] In this embodiment, the boundary between the low-frequency region and the high-frequency region can be pre-set according to actual needs and can be set at any position in the panel display area, for example Figure 2 and Figure 5As shown, the panel is divided into two parts or three parts, etc. At the boundary, the corresponding first GOA unit is turned on or off by the driving signal Gout_B and the start signal STV_Total.

[0034] This embodiment controls the second GOA unit to input the driving signal Gout_B signal to the first GOA unit, and controls the frame start bus to input the start signal STV_Total signal to the first GOA unit; the first frame start signal can be replaced by the Gout_B signal and the STV_Total signal to start the first GOA unit, thereby freely controlling the start or shut down of the corresponding first GOA unit, thereby controlling the start of any GOA unit, and solving the problem that the GOA start depends on the STV signal, and the STV signal only acts on the first few rows, and it is impossible to start the GOA structure from a middle row.

[0035] In a first implementation manner of this embodiment, controlling the activation of the corresponding first GOA unit by the driving signal and the start signal includes: A21, determining the first boundary from the low-frequency region to the high-frequency region; A22, turn on the second frame start signal to control the second GOA unit to turn on step by step, and control the second GOA unit to input a high-voltage drive signal to the corresponding first GOA unit, and at the same time control the frame start bus to output a low-voltage start signal, control the frame start bus to output a high-voltage start signal at the first boundary, and turn on the first GOA unit at the first boundary.

[0036] In this embodiment, in a certain display frame, the first frame start signal STV_A of the first GOA unit is not turned on, or the first GOA unit is turned off by the first reset signal total reset_A, then the first GOA unit has no output, and in this display frame, the second frame start signal STV_B of the second GOA unit is normally turned on, then the second GOA unit is turned on step by step, and the high-voltage drive signal Gout_B signal is input to the first GOA unit of the corresponding row, but the frame start bus outputs the low-voltage start signal STV_Total signal. At this time, the first GOA unit still has no output, corresponding to the low-frequency area. When reaching the first boundary from the low-frequency area to the high-frequency area, the control frame start bus outputs the high-voltage start signal, refer to Figure 8 When the start signal STV_Total and the drive signal Gout_B are both high voltage, the second transistor Tx and the third transistor Ty can replace the function of the first transistor T1 to connect VDD and the Q point together, thereby turning on the first GOA unit at the first boundary, performing step-by-step scanning in the high-frequency area, and realizing switching from low frequency to high frequency.

[0037] In a second implementation of this embodiment, controlling the shutdown of the corresponding first GOA unit by using the driving signal and the start signal includes: B21, determining the second boundary from the high-frequency region to the low-frequency region; B22, controlling the first reset signal to turn on at the second boundary, and controlling the frame start bus to output a low-voltage start signal, and turning off the first GOA unit.

[0038] In this embodiment, in a certain display frame, when the first GOA unit is turned on by the first frame start signal STV_A, or by the STV_Total signal and Gout_B, the first GOA unit performs a step-by-step scan corresponding to the high-frequency region. At the second boundary from the high-frequency region to the low-frequency region, the first reset signal total reset_A is controlled to be turned on. When the first reset signal totalreset_A rises, the working process of all first GOA units is terminated. At the same time, the frame start bus is controlled to output a low-voltage start signal to turn off the first GOA unit, realizing the switch from high frequency to low frequency.

[0039] In a third implementation of this embodiment, the GOA driving method further includes: controlling the first GOA unit to turn on in the first frame while maintaining the frame start bus to output a low-voltage start signal; for N frames after the first frame, at the boundary, controlling the corresponding first GOA unit to turn on or off through the driving signal and the frame start signal, where N is a positive integer; and performing cyclic scanning with the first frame and the N frames as the scanning period.

[0040] In this embodiment, referring to Figure 9 , in one example, N is 1, and the N frames after the first frame are the second frame. In the first frame, the entire panel displays normally, that is, the first frame start signal STV_A is turned on to turn on the first GOA unit, and the first GOA unit scans row by row according to the set initial frequency starting from the first row of pixels, while maintaining the frame start bus to output a low-voltage start signal. At this time, the first GOA unit and the second GOA unit do not interfere with each other to complete the first frame. In the second frame, at the boundary, the corresponding first GOA unit is controlled to be turned on or off by the drive signal Gout_B and the start signal STV_Total signal. The display frequency of different panel areas can be adjusted by adjusting the scan period, so that different areas of the panel can be displayed at different scan frequencies.

[0041] In this embodiment, the second frame start signal STV_B of the second GOA unit is controlled to be turned off in the first frame. Since the entire panel displays normally in the first frame, the first frame is scanned step by step by the first GOA unit, and the second GOA unit may not be turned on to further save power consumption.

[0042] In one implementation of this embodiment, determining the boundary between the low-frequency area and the high-frequency area includes: calculating the unit turn-on time of the second GOA unit turning on each row of pixels; obtaining the number of pixel rows in the low-frequency area and the high-frequency area, and determining the number of boundary rows between the low-frequency area and the high-frequency area; calculating the target time corresponding to the number of boundary rows based on the unit turn-on time, and using the target time as the boundary between the low-frequency area and the high-frequency area.

[0043] In this embodiment, since the output signal GOA_B of the second GOA unit is turned on row by row, the time for each row to be turned on can be calculated. Therefore, it is only necessary to turn on the start signal STV_Total at the corresponding time to start the first GOA unit for row-by-row scanning in any set pixel row.

[0044] In the related technology, based on the traditional GOA structure, its driving method can only divide the panel into two parts, and the upper half is fixed to high frequency and the lower half to low frequency, and it is impossible to achieve the upper half low frequency and the lower half high frequency or the like. Figure 5 Based on this, in an application scenario of this embodiment, the scanning cycle is performed with two frames as the scanning period. In the first frame, the first GOA unit is normally turned on, and the frame start bus outputs a low-voltage start signal. In the second frame, the first frame start signal STV_A of the first GOA unit is not turned on, and the first GOA unit has no output. The second frame start signal STV_B of the second GOA unit is normally turned on, and the second GOA unit is turned on step by step. When the second GOA unit is turned on to the part where the low and high frequency division is required, the frame start bus outputs a high-voltage start signal STV_Total. At this time, according to Figure 8 The first GOA unit of the corresponding row is turned on, and the signal is transmitted downward step by step. When it reaches the next high-low frequency boundary, the first reset signal totalreset_A of the first GOA unit is turned on, and the first GOA unit is turned off, so as to achieve Figure 5 Taking a traditional video website as an example, the panel is divided into three scanning frequency areas. In a similar manner, the position of high and low frequency switching can be freely controlled by the start signal STV_Total and the first reset signal total reset_A, and is not limited to dividing the panel into three parts.

[0045] Reference Figure 9 Assuming the initial frequency is 120Hz, the high frequency component is turned on twice within two frames, resulting in a 120Hz signal. The low frequency component is turned on only once within two frames, making the low frequency component equivalent to 60Hz. Similarly, assuming the initial frequency is 120Hz, the second frame's behavior is repeated in the third frame, and this cycle repeats with a three-frame cycle. The low frequency component is equivalent to 40Hz.

[0046] Through this embodiment, the panel can be divided into any parts, the boundary position can be arbitrarily selected and the frequency of each part can be adjusted.

[0047] Through the description of the above embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal device (which can be a television, a computer, etc.) to execute the methods described in each embodiment of the present application.

[0048] Third embodiment: An embodiment of the present application provides a display device, which includes the GOA driving circuit and a display panel in the above embodiment, and the display panel and the GOA driving circuit are electrically connected.

[0049] In the above embodiments of the present application, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0050] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0051] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0052] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a computer storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned computer storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk, etc. Various media that can store program code.

[0053] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A GOA driving circuit, comprising a plurality of cascaded first GOA units, each of which is connected to a scan line in a display area and is used to output a scan signal to the corresponding scan line, characterized in that: The GOA driving circuit also includes a second GOA unit arranged corresponding to the first GOA unit, and a frame start bus; the second GOA unit inputs a driving signal to the first GOA unit, the frame start bus is connected to each first GOA unit, and a start signal is input to the first GOA unit, and the corresponding first GOA unit is controlled to be turned on or off through the driving signal and the start signal.

2. The GOA driving circuit according to claim 1, characterized in that: The input end of the first GOA unit includes a first transistor (T1), a second transistor (Tx) and a third transistor (Ty); The control end of the first transistor (T1) is connected to the output end of the first GOA unit of the previous stage, the first end of the first transistor (T1) is connected to the power supply voltage, and the second end is connected to the control node, and the control node is used to control the output end of the first GOA unit; The second transistor (Tx) and the third transistor (Ty) are arranged between the power supply voltage and the control node, the frame start bus inputs a start signal to the second transistor (Tx), and the second GOA unit inputs a drive signal to the third transistor (Ty).

3. The GOA driving circuit according to claim 1, characterized in that: The second GOA unit and the first GOA unit at the same level share the same clock signal line.

4. A GOA driving method, applied to the GOA driving circuit according to any one of claims 1 to 3, characterized in that: The method comprises: Determine a boundary between a low-frequency region and a high-frequency region, wherein the low-frequency region is a panel region that needs low-frequency display, and the high-frequency region is a panel region that needs high-frequency display; At the boundary, the second GOA unit is controlled to input a driving signal to the first GOA unit, and the frame start bus is controlled to input a start signal to the first GOA unit; the corresponding first GOA unit is controlled to be turned on or off through the driving signal and the start signal.

5. The GOA driving method according to claim 4, characterized in that: Controlling the start of the corresponding first GOA unit by the driving signal and the start signal includes: Determine a first boundary from a low frequency region to a high frequency region; The second frame start signal is turned on to control the second GOA unit to turn on step by step, and the second GOA unit is controlled to input a high-voltage drive signal to the corresponding first GOA unit, and the frame start bus is controlled to output a low-voltage start signal, and the frame start bus is controlled to output a high-voltage start signal at the first boundary to turn on the first GOA unit at the first boundary.

6. The GOA driving method according to claim 4, characterized in that: Controlling the corresponding first GOA unit to be turned off by the driving signal and the start signal includes: determining a second boundary from the high frequency region to the low frequency region; At the second boundary, the first reset signal is controlled to be turned on, and at the same time, the frame start bus is controlled to output a low-voltage start signal to turn off the first GOA unit.

7. The GOA driving method according to claim 4, characterized in that: The method further comprises: Control the first GOA unit to start in the first frame, and keep the frame start bus outputting a low voltage start signal; For N frames after the first frame, at the boundary, the corresponding first GOA unit is controlled to be turned on or off by the driving signal and the start signal, wherein N is a positive integer; The first frame and the N frames are used as scanning periods for cyclic scanning.

8. The GOA driving method according to claim 7, characterized in that: The second frame start signal of the second GOA unit is controlled to be turned off within the first frame.

9. The GOA driving method according to claim 4, characterized in that: Determine the boundary between the low-frequency area and the high-frequency area. Determine the boundary between the low-frequency area and the high-frequency area including: Calculate the unit turn-on time of the second GOA unit turning on each row of pixels; Acquire the number of pixel rows in the low-frequency region and the high-frequency region, and determine the number of boundary rows between the low-frequency region and the high-frequency region; The target time corresponding to the number of demarcation lines is calculated according to the unit opening time, and the target time is used as the demarcation between the low-frequency area and the high-frequency area.

10. A display device, comprising a display panel and a GOA driving circuit, wherein the display panel and the GOA driving circuit are electrically connected, characterized in that: The GOA driving circuit adopts the GOA driving circuit described in any one of claims 1 to 3 above.

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