GOA driving circuit, GOA driving method and display device

Abstract

The present application discloses a GOA driving circuit, a GOA driving method and a display device, wherein the GOA driving circuit includes 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. The GOA driving circuit also includes a second GOA unit 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. The present application sets a second GOA unit corresponding to the first GOA unit, and adds a frame start bus at the same time. The second GOA unit and the frame start bus provide a signal to the first GOA unit, and replace the frame start signal to control the opening of the first GOA unit, thereby realizing free control of the start and stop of the first GOA unit.

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 display screens, 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 clear video effects. In the nearly static display position (referred to as the static area), maintaining a high scanning frequency will only simply waste power consumption.

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

[0004] With respect to the above-mentioned problems existing in the related technologies, no effective solutions have been found so far. 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 and being used to output a scan signal to the corresponding scan line, the GOA driving circuit also comprising 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 by the driving 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 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).

[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 area and a high-frequency area, wherein the low-frequency area is a panel area that requires low-frequency display, and the high-frequency area is a panel area that requires 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, through the drive signal and the start signal, controlling the opening of the corresponding first GOA unit includes: determining a first boundary from a low-frequency area to a high-frequency area; turning on a second frame start signal to control the second GOA unit to turn on step by step, 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 turn on the first GOA unit at the first boundary.

[0011] Optionally, controlling the closing of the corresponding first GOA unit through the drive signal and the start signal includes: determining a second boundary from the high-frequency area to the low-frequency area; controlling the first reset signal to turn on at the second boundary, and simultaneously controlling the frame start bus to output a low-voltage start signal to close the first GOA unit.

[0012] Optionally, the method also 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 opening or closing of the corresponding first GOA unit 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, a 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. 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 for the first GOA unit to control the opening or closing of the first GOA unit. 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 the GOA structure cannot be started from a certain middle row is solved, and free control of the start and stop of the GOA architecture is realized. 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:

[0018] Figure 1 Schematic diagram of the structure of the GOA driving circuit of an embodiment of the present application;

[0019] Figure 2 This is a schematic diagram of traditional IC realizing high frequency in the upper half and low frequency in the lower half;

[0020] 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;

[0021] Figure 4It is a schematic diagram of the structure of a GOA circuit in the prior art that introduces a signal by adding an STV corresponding to a partition row;

[0022] Figure 5 It is a schematic diagram of dividing the panel into three scanning frequency regions in an embodiment of the present application;

[0023] Figure 6 is a GOA circuit architecture diagram of an embodiment of the present application;

[0024] Figure 7 This is the input and Q-point architecture diagram of the traditional GOA;

[0025] Figure 8 1 is a diagram of the input end and Q point structure of the first GOA unit in the embodiment of the present application;

[0026] Fig. 9 It is a GOA timing diagram in an embodiment of the present application;

[0027] Fig.10 is a flow chart of a GOA driving method of a display panel according to an embodiment of the present application;

[0028] Fig.11 Schematic diagram of the structure of the second GOA unit in the embodiment of the present application;

[0029] Fig.12 It is a schematic diagram of the structure adopted by the first GOA unit in the embodiment of the present application. DETAILED DESCRIPTION

[0030] 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 the field without creative work should fall within the scope of protection of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0031] 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 sequence. 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.

[0032] First embodiment:

[0033] In the related technology, some chips (ICs) can start the first row of the entire GOA structure based on the frame start signal (STV signal), and terminate the working process of GOA based on the reset signal (total reset signal), so that the upper and lower halves of the panel can have different display frequencies (high frequency in the upper half and low frequency in the lower half) to save power consumption. 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:

[0034] Reference Figure 3 In the traditional GOA timing diagram shown, the relevant technical solution displays the entire panel normally in the first frame (turn on the STV signal, and scan the pixels from the first row line by line according to the set initial frequency), but turns on the reset signal total reset signal at the boundary between the high-frequency part and the low-frequency part of the second frame to reset the entire GOA architecture and restore it to the initial state, and cycles with these two frames as a cycle. In the two frames, the high-frequency part pixels are scanned twice, while the low-frequency part pixels are scanned only once. Assuming that the initial frequency of the panel is 120Hz, the high-frequency part remains unchanged at 120Hz, and the low-frequency part is equivalent to half of 120Hz, that is, 60Hz. In this way, the different frequencies of the upper and lower halves can be achieved through the control of the chip, and the boundary between the high-frequency part and the low-frequency part is demarcated by the position where the reset signal (total reset signal) is started. Since the panel does not need to maintain 120Hz throughout the entire process, the display power consumption is reduced. However, the activation of the GOA architecture of 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 high frequency and the lower half low frequency. It is impossible to achieve more refined regional control.

[0035] 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 wiring lines will be required, which is not of practical significance.

[0036] Based on this, the embodiment of the present application provides a GOA driving circuit, referring to Figure 1 and Figure 6 The GOA driving circuit includes two groups of GOAs arranged on one side of the display area (AA area), one of which includes a plurality of cascaded first GOA units (referred to as GOA_A), and the other group includes second GOA units (referred to as GOA_B) arranged corresponding to the first GOA units, and a frame start bus is 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, that is, the output Gout_A of GOA_A provides a signal for the scan line (gate line) of the display area.

[0037] 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 a start signal (STV_Total signal) is input to the first GOA unit. The corresponding first GOA unit is turned on or off by the Gout_B signal and the STV_Total signal.

[0038] Through this embodiment, a second GOA unit corresponding to the first GOA unit is set, and a frame start bus is added. 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 for 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, thereby realizing free control of the start and stop of the GOA architecture.

[0039] 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.

[0040] Reference Figure 7The input terminal and control node (Q point) architecture of the traditional GOA unit shown in the figure, when the previous level output signal G(n-2) is transmitted to the GOA unit of this row to turn on the first transistor T1, the power supply voltage VDD pulls up the Q point voltage, and the Q point is connected to the gate of the output transistor TFT (not shown in the figure), turning on the output transistor TFT to provide a signal for the scan line. If the working process of the GOA unit is terminated by the reset signal total reset in the current frame, the GOA unit can only be started by the STV signal in the first row of the next frame, that is, the panel can only be divided into two fixed parts: the upper half high frequency and the lower half low frequency.

[0041] In this embodiment, refer to Figure 8 , 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 (the control end can be the gate of the first transistor T1) is connected to the output end Gout_A(n-2) of the first GOA unit of the previous level, the first end of the first transistor T1 is connected to the power supply voltage VDD, the second end is connected to the control node Q point (according to different transistor types, the first end can be one of the source and the drain, and the second end is the other of the source and the drain), Q point is connected to the gate of the output transistor TFT, and the output transistor TFT is turned on to control the output end of the first GOA unit to provide a signal for the scan line; the second transistor Tx and the third transistor Ty are set between the power supply voltage VDD and the Q point, the frame start bus inputs the start signal STV_Total signal 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 voltage, the second transistor Tx and the third transistor Ty can replace the role of 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, the corresponding first GOA unit can be turned on by giving the STV_Total signal a high voltage when the corresponding second GOA unit has an output. 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 control the frame start bus to output a high voltage signal at the corresponding time to start the first GOA unit in any row. The stop is achieved by the first reset signal of the first GOA unit, the total reset_A signal. 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 the display of different scanning frequencies in different areas of the panel.

[0042] 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.

[0043] In this embodiment, since the entire second GOA unit structure is not responsible for providing a signal to the display area, but is only responsible for providing a signal 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 the first GOA unit and only requires a small amount of wiring, such as Figure 6 As shown, the second GOA unit shares a 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.

[0044] For example, the second GOA unit may adopt a relatively simple 8T1C GDL architecture, such as Fig.11 As shown. The 8T1C GDL architecture includes 8 transistors TFT and 1 capacitor C, among which T1 is used for signal input; T3 is used for signal output; T7 and T4 are controlled by the second reset signal total reset_B signal, which is used to reset the entire circuit; T2, T5 and T8 are reset control signals, which are used to ensure continuous reset when the GOA of this row is not working; T6 is used to turn off the reset control signal when the GOA of this row is working. All clock signals in this structure can be shared with the clock signal of GOA_A, without adding additional clock signals. In addition, the TFTs and capacitors in this structure can be set relatively small to ensure the basic output waveform, which can reduce the wiring load as much as possible and save power consumption.

[0045] The first GOA unit needs to ensure the display area signal output, so a relatively complex GOA architecture can be selected, such as Fig.12 The 11T1C GDL architecture includes 11 transistors TFT (2 T7, 2 T4, 2 T2, 2 T6, T1A, T2A and T5) and 1 capacitor C1. Due to the addition of Tx and Ty, the number of TFTs increases to 13. In order to reduce noise and ensure the life of TFT, the architecture adopts a double pull-down structure. LC1 and LC2 control two sets of reset control units respectively. The two are turned on alternately to ensure that the GOA architecture can be continuously reset during non-operation.

[0046] Second embodiment:

[0047] 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. Fig.10 , Fig.10 is a flow chart of a GOA driving method according to an embodiment of the present application. Fig.10 As shown, the process includes the following steps:

[0048] Step S10, determining a boundary between a low-frequency region and a high-frequency region, wherein the low-frequency region is a panel region that needs to be displayed at a low frequency, and the high-frequency region is a panel region that needs to be displayed at a high frequency;

[0049] Step S20, 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 frame start signal to the first GOA unit; controlling the opening or closing of the corresponding first GOA unit through the driving signal and the start signal.

[0050] In this embodiment, the boundary between the low-frequency region and the high-frequency region can be preset according to actual needs, and can be set at any position in the panel display area, for example Figure 2 and Figure 5 As 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 signal and the start signal STV_Total signal.

[0051] In this embodiment, the second GOA unit is controlled to input a driving signal Gout_B signal to the first GOA unit, and the frame start bus is controlled to input a 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 realizing free control of the start or shutdown of the corresponding first GOA unit, thereby realizing control of 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.

[0052] In a first implementation manner of the present embodiment, controlling the start of the corresponding first GOA unit through the driving signal and the start signal includes:

[0053] A21, determining the first boundary from the low frequency region to the high frequency region;

[0054] 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, and control the frame start bus to output a high-voltage start signal at the first boundary to turn on the first GOA unit at the first boundary.

[0055] 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 frame start bus is controlled to output a 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 first transistor T1 to connect VDD and the Q point together, thereby turning on the first GOA unit at the first boundary, and performing step-by-step scanning in the high frequency area to achieve switching from low frequency to high frequency.

[0056] In a second implementation of the present embodiment, controlling the corresponding first GOA unit to be turned off by the driving signal and the start signal includes:

[0057] B21, determine the second boundary from the high frequency region to the low frequency region;

[0058] 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.

[0059] 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 turned on by the STV_Total signal and Gout_B, the first GOA unit performs step-by-step scanning, corresponding to the high-frequency area. At the second boundary from the high-frequency area to the low-frequency area, the first reset signal total reset_A is controlled to be turned on, and the first reset signal totalreset_A signal increases to terminate the working process of all first GOA units, 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 to switch from high frequency to low frequency.

[0060] In a third implementation of the present 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 opening or closing of the corresponding first GOA unit through the driving signal and the frame start signal, wherein N is a positive integer; and performing cyclic scanning with the first frame and the N frames as the scanning period.

[0061] In this embodiment, refer to Fig. 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 line by line from the first row of pixels according to the set initial frequency, while keeping the frame start bus outputting 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 turned on or off by the driving signal Gout_B and the start signal STV_Total. The display frequency of different panel areas can be adjusted by adjusting the scanning period, so that different areas of the panel can be displayed at different scanning frequencies.

[0062] 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.

[0063] In one implementation of the present 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 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.

[0064] In this embodiment, since the output signal GOA_B of the second GOA unit is turned on row by row, the time for turning on each row 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.

[0065] In the related art, 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 is low frequency, and it is impossible to achieve the upper half low frequency and the lower half high frequency or Figure 5Based on this, in an application scenario of the present embodiment, two frames are used as the scanning cycle for cycling, the first GOA unit is normally turned on in the first frame, and the frame start bus is kept outputting 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, then the first GOA unit has no output, 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, when the second GOA unit is turned on to the part where low and high frequency demarcation 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 the next high-low frequency boundary is reached, 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 signal and the first reset signal total reset_A, and is not limited to dividing the panel into 3 parts.

[0066] Reference Fig. 9 , assuming the initial frequency is 120Hz, the high frequency part is turned on twice within two frames, which is 120Hz. The low frequency part is only turned on once within two frames, and the low frequency part is equivalent to 60Hz. Similarly, assuming the initial frequency is 120Hz, the action of the second frame is repeated in the third frame, and then it is cycled with 3 frames as a cycle, then the low frequency part is equivalent to 40Hz.

[0067] 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.

[0068] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course 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, which is stored in a storage medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a TV, or a computer, etc.) to execute the methods described in each embodiment of the present application.

[0069] Third embodiment:

[0070] 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.

[0071] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0072] 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. There may be other division methods in actual implementation. For example, 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.

[0073] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0074] 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 is essentially 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, including several instructions to enable 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, disk or optical disk and other media that can store program codes.

[0075] The above is only a preferred implementation 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 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; 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 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).

2. 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.

3. A GOA driving method, applied to the GOA driving circuit according to claim 1 or 2, 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 third transistor in the first GOA unit, and the frame start bus is controlled to input a start signal to the second transistor in 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.

4. The GOA driving method according to claim 3, 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.

5. The GOA driving method according to claim 3, 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.

6. The GOA driving method according to claim 3, 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.

7. The GOA driving method according to claim 6, characterized in that: The second frame start signal of the second GOA unit is controlled to be turned off within the first frame.

8. The GOA driving method according to claim 3, characterized in that: Determining the boundary between the low-frequency area and the high-frequency area includes: 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.

9. 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 claim 1 or 2 above.

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