Driving circuit and display panel

Abstract

The present application provides a driving circuit and a display panel. The driving circuit includes a first signal line, a selection switch module and a driving control module. The first signal line is used to provide a first level signal or a second level signal. The selection switch module includes a signal input terminal, a first output terminal and a second output terminal. The signal input terminal is electrically connected to the first signal line. The driving control module includes a bottom gate and a top gate. The first output terminal is electrically connected to the top gate, and the second output terminal is electrically connected to the bottom gate. The selection switch module outputs the first level signal to the top gate or the bottom gate through the first output terminal or the second output terminal, so that the top gate and the bottom gate work alternately; the driving unit does not work when the first signal line provides a second level signal. The alternating operation of the dual gate can reduce the charge accumulation in the gate insulation layer caused by voltage stress during the long-term operation of the driving unit. The driving control module replaces the driving unit, thereby effectively improving the threshold voltage V TH drift phenomenon.

Description

Technical Field

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

[0002] With the development of optoelectronic display technology and semiconductor manufacturing technology, display panels equipped with thin film transistors (TFT) have become increasingly mature. OLED (Organic Light Emitting Diode, OLED) display panels have obvious advantages in thickness, color saturation, contrast, flexible display, etc., and the development of OLED display panels has broad prospects.

[0003] TFT switching devices have an important impact on the display quality and are the direction for optimizing and improving the display quality. As the display panel is used for a long time, the threshold voltage V TH will drift, and the threshold voltage V TH Instability will lead to instability in the electrical performance of the TFT device, as well as reduced product display quality and service life. How to effectively improve the threshold voltage V TH The drift phenomenon becomes a technical problem that needs to be solved. Summary of the invention

[0004] The purpose of this application is to provide a driving circuit and a display panel to solve the problem of how to effectively reduce the threshold voltage V TH Technical issues regarding drift phenomenon.

[0005] In a first aspect, the present application provides a driving circuit applied to a display panel, the driving circuit comprising:

[0006] A first signal line, used for providing a first level signal or a second level signal;

[0007] A selection switch module, the selection switch module comprising a signal input terminal, a first output terminal and a second output terminal, the signal input terminal being electrically connected to the first signal line; and

[0008] A drive control module, wherein the drive control module includes a bottom gate and a top gate, the first output terminal is electrically connected to the top gate, the second output terminal is electrically connected to the bottom gate, the selection switch module outputs the first level signal to the top gate or the bottom gate through the first output terminal or the second output terminal, so that the top gate and the bottom gate work alternately; the drive control module is also used to not work when the first signal line provides the second level signal.

[0009] In the driving circuit provided by the present application, the signal input end of the selection switch module is electrically connected to the first signal line, the second output end is electrically connected to the bottom gate of the driving control module, and the first output end is electrically connected to the top gate of the driving control module. The selection switch module is used to alternately provide the first level signal to the bottom gate and the top gate when the first signal line provides a first level signal, so that the bottom gate and the top gate work alternately; the driving control module does not work when the first signal line provides a second level signal. Compared with the driving unit in the related art having only a single gate, the driving control module of the present application has a bottom gate and a top gate. The alternating operation of the dual gates can reduce the charge accumulation in the gate insulation layer caused by voltage stress during the long-term operation of the driving unit. The driving control module replaces the driving unit, thereby effectively improving the threshold voltage V TH drift phenomenon.

[0010] The selection switch module includes a second signal line, a third signal line, a first switch and a second switch, the first switch has a first gate, a first source and a first drain, the second switch has a second gate, a second source and a second drain, the first gate is electrically connected to the second signal line, the second gate is electrically connected to the third signal line, the first source and the second source are both electrically connected to the first signal line, the first drain is electrically connected to the bottom gate, and the second drain is electrically connected to the top gate;

[0011] The second output terminal is the first drain, and the first output terminal is the second drain;

[0012] The second signal line and the third signal line are used to alternately provide a third level when the first signal line provides a first level signal, so that the first switch and the second switch are alternately turned on.

[0013] Wherein, the driving circuit also includes a first pull-down module, which is electrically connected to the bottom gate and the top gate respectively, and is used to ground the top gate when the bottom gate is working, and is also used to ground the bottom gate when the top gate is working.

[0014] Among them, the first pull-down module includes a third switch and a fourth switch, the third switch has a third gate, a third source and a third drain, the fourth switch has a fourth gate, a fourth source and a fourth drain, the third gate is electrically connected to the second signal line, the third source is electrically connected to the top gate, the third drain is used to electrically connect to a reference ground or a common potential, the fourth gate is electrically connected to the third signal line, the fourth source is electrically connected to the bottom gate, and the fourth drain is used to electrically connect to the reference ground or the common potential.

[0015] Among them, the driving circuit also includes a second pull-down module and a pull-down voltage line, the second pull-down module is electrically connected to the first gate and the second gate respectively, the second pull-down module is used to electrically connect the second gate to the pull-down voltage line when the first switch is turned on, so that the second switch is turned off; the second pull-down module is also used to electrically connect the first gate to the pull-down voltage line when the second switch is turned on, so that the first switch is turned off.

[0016] Among them, the second pull-down module includes a fifth switch and a sixth switch, the fifth switch has a fifth gate, a fifth source and a fifth drain, the sixth switch has a sixth gate, a sixth source and a sixth drain, the fifth gate is electrically connected to the second signal line, the fifth source is electrically connected to the pull-down voltage line, the fifth drain is electrically connected to the third signal line, the sixth gate is electrically connected to the third signal line, the sixth source is electrically connected to the pull-down voltage line, and the sixth drain is electrically connected to the second signal line.

[0017] Wherein, the driving circuit is arranged in the non-display area of ​​the display panel; the working phase of the driving circuit includes a charging phase, a driving phase and a reset phase; the first level signal includes a first sub-level and a second sub-level;

[0018] The driving circuit further includes a charging module, wherein the charging module is electrically connected to the first signal line;

[0019] Wherein, during the charging stage, the charging module provides the first sub-level to the first signal line, and the selection switch module provides the first sub-level alternately to the bottom gate and the top gate, so that the top gate or the bottom gate works alternately during the charging stage.

[0020] Wherein, the driving circuit further includes a driving signal input terminal and a driving signal output terminal, and the driving unit further includes a driving source and a driving drain, the driving source is electrically connected to the driving signal input terminal, and the driving drain is electrically connected to the driving signal output terminal;

[0021] Wherein, during the driving stage, the driving signal input terminal provides a driving level, the first sub-level in the first signal line is changed to a second sub-level, the selection switch module alternately provides the second sub-level to the bottom gate and the top gate, so that the top gate or the bottom gate works alternately during the driving stage, and the driving unit works to provide the driving level to the driving signal output terminal.

[0022] Wherein, the driving circuit further includes a reset module and a reset voltage line, and the reset module is electrically connected to the reset voltage line, the first signal line and the driving signal output end respectively;

[0023] In the driving stage, the reset module is internally turned on so that the first signal line and the driving signal output end are electrically connected to the reset voltage line to pull down the voltage of the first signal line and the driving signal output end.

[0024] Among them, the driving circuit is arranged in the display area of ​​the display panel; the driving circuit also includes a light-emitting unit and a data line, the first signal line is a scan line, the driving unit also includes a driving source and a driving drain, the driving source is electrically connected to the data line, and the driving drain is electrically connected to the light-emitting unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 This is a schematic diagram of a driving circuit structure provided in the first embodiment of the present application;

[0027] Figure 2 This is a schematic diagram of a driving circuit structure provided in Embodiment 2 of the present application;

[0028] Figure 3 This is a schematic diagram of a driving circuit structure provided in Embodiment 3 of the present application;

[0029] Figure 4 This is a schematic diagram of a driving circuit structure provided in Embodiment 4 of the present application;

[0030] Figure 5 This is a schematic diagram of a driving circuit structure provided in Embodiment 5 of the present application;

[0031] Figure 6 This is a timing diagram of a driving circuit structure provided in Embodiment 5 of the present application;

[0032] Figure 7 This is a schematic diagram of a driving circuit structure provided in Embodiment 6 of the present application;

[0033] Figure 8 It is a structural schematic diagram of a display panel provided in Embodiment 7 of the present application.

[0034] Description of labels:

[0035] Display panel-100, driving circuit-1000, first signal line-1, capacitor-10, first capacitor terminal-101, second capacitor terminal-102, selection switch module-2, signal input terminal-21, second output terminal-22, first output terminal-23, second signal line-24, third signal line-25, first switch-26, first gate-261, first source-262, first drain-263, second switch-27, second gate-271, second source-272, second drain-273, driving control module-3, bottom gate-311, top gate-312, driving drain-313, driving source-314, first pull-down module-4, third switch-41, third gate-411, third source-412, third drain-413, fourth switch -42, fourth gate-421, fourth source-422, fourth drain-423, second pull-down module-5, pull-down voltage line-51, fifth switch-52, fifth gate-521, fifth source-522, fifth drain-523, sixth switch-53, sixth gate-531, sixth source-532, sixth drain-533, charging module-6, driving signal input terminal-61, charging switch-611, driving signal output terminal-7, reset module-8, reset voltage line-81, seventh switch-82, seventh gate-821, seventh source-822, seventh drain-823, eighth switch-83, eighth gate-831, eighth source-832, eighth drain-833, reset signal line-84, light-emitting unit-90, data line-91. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] Reference to "embodiment" or "implementation" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment or implementation may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0038] It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the above drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0039] In this specification, for the sake of convenience, the words and phrases indicating the orientation or positional relationship such as "middle", "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like are used to illustrate the positional relationship of the constituent elements with reference to the drawings. This is only for the convenience of describing this specification and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. The positional relationship of the constituent elements is appropriately changed according to the orientation of the constituent elements being described. Therefore, it is not limited to the words and phrases described in the specification, and can be appropriately replaced according to the circumstances.

[0040] In this specification, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate, or the internal communication of two elements. For ordinary technicians in this field, the meanings of the above terms in this disclosure can be understood according to the circumstances.

[0041] With the development of optoelectronic display technology and semiconductor manufacturing technology, display panels equipped with thin film transistors (ThinFilm Transistor-Light Emitting Diode, TFT-LED) have become more and more mature. In terms of thickness, color saturation, contrast, flexible display, etc., OLED (Organic Light Emitting Diode, OLED) display panels have obvious advantages, and the development of OLED display panels has broad prospects.

[0042] TFT switching devices have an important impact on the display quality and are the direction for optimizing and improving the display quality. As the display panel is used for a long time, the threshold voltage V TH will drift, and the threshold voltage V TH Instability will lead to instability in the electrical performance of the TFT device, as well as reduced product display quality and service life. How to effectively improve the threshold voltage V TH The drift phenomenon becomes a technical problem that needs to be solved.

[0043] Please refer to Figure 1 , Figure 11 is a schematic diagram of a driving circuit structure provided in the first embodiment of the present application. The present application provides a driving circuit 1000 to improve the driving unit threshold voltage V TH The driving circuit 1000 is applied to a display panel. The driving control module 3 is a driving unit in the related art. For the convenience of distinction, different names are given to them, which should not be understood as a limitation to the present application.

[0044] The driving circuit 1000 includes a first signal line 1, a selection switch module 2 and a driving control module 3. The first signal line 1 is used to provide a first level signal or a second level signal. The selection switch module 2 includes a signal input terminal 21, a second output terminal 22 and a first output terminal 23, and the signal input terminal 21 is electrically connected to the first signal line 1. The driving control module 3 includes a bottom gate 311 and a top gate 312, the second output terminal 22 is electrically connected to the bottom gate 311, and the first output terminal 23 is electrically connected to the top gate 312. The selection switch module 2 outputs the first level signal to the top gate 312 or the bottom gate 311 through the first output terminal 23 or the second output terminal 22, so that the bottom gate 311 and the top gate 312 work alternately. The driving control module 3 does not work when the first signal line 1 provides a second level signal.

[0045] It should be noted that the first level signal in the present application only refers to the level at which the bottom gate 311 or the top gate 312 can be driven to work, including but not limited to one level value or multiple level values. The second level signal in the present application only refers to the level at which the bottom gate 311 or the top gate 312 cannot be driven to work, including but not limited to one level value or multiple level values.

[0046] Optionally, the driving control module 3 is a thin film transistor, including but not limited to an N-type thin film transistor or a P-type thin film transistor. In the embodiment of the present application, the driving control module 3 is illustrated as an N-type thin film transistor, which should not be understood as a limitation of the present application. When the driving control module 3 is an N-type thin film transistor, the first level signal is a high level and the second level signal is a low level, so the selection switch module 2 alternately provides the first level signal to the bottom gate 311 and the top gate 312, and the bottom gate 311 and the top gate 312 work alternately; when the selection switch module 2 provides the second level signal to the bottom gate 311 or the top gate 312 of the driving control module 3, the driving control module 3 does not work.

[0047] The selection switch module 2 outputs the first level signal to the top gate 312 or the bottom gate 311 through the first output terminal 23 or the second output terminal 22, so that the bottom gate 311 and the top gate 312 work alternately. Specifically, the selection switch module 2 is used to alternately provide the first level signal to the bottom gate 311 and the top gate 312 when the first signal line 1 provides the first level signal. In other words, for example, the total duration of the first signal line 1 providing the first level signal is 2s, and the selection switch module 2 can provide the first level signal to the bottom gate 311 at 0s-1s, and provide the first level signal to the top gate 312 at 1s-2s.

[0048] In the driving circuit 1000 provided in the present application, the signal input terminal 21 of the selection switch module 2 is electrically connected to the first signal line 1, the second output terminal 22 is electrically connected to the bottom gate 311 of the driving control module 3, and the first output terminal 23 is electrically connected to the top gate 312 of the driving control module 3. The selection switch module 2 is used to alternately provide the first level signal to the bottom gate 311 and the top gate 312 when the first signal line 1 provides a first level signal, so that the bottom gate 311 and the top gate 312 work alternately; the driving control module 3 does not work when the first signal line 1 provides a second level signal. Compared with the driving control module 3 in the related art having only a single gate, the driving control module 3 of the present application has a bottom gate 311 and a top gate 312. The alternating operation of the dual gates can reduce the charge accumulation in the gate insulation layer caused by voltage stress during the long-term operation of the driving control module 3. The driving control module 3 replaces the driving unit, thereby effectively improving the threshold voltage V TH drift phenomenon.

[0049] Please refer to Figure 2 , Figure 2 1 is a schematic diagram of a driving circuit structure provided in Embodiment 2 of the present application. The selection switch module 2 includes a second signal line 24, a third signal line 25, a first switch 26 and a second switch 27. The first switch 26 has a first gate 261, a first source 262 and a first drain 263. The second switch 27 has a second gate 271, a second source 272 and a second drain 273. The first gate 261 is electrically connected to the second signal line 24, the second gate 271 is electrically connected to the third signal line 25, the first source 262 and the second source 272 are both electrically connected to the first signal line 1, the first drain 263 is electrically connected to the bottom gate 311, and the second drain 273 is electrically connected to the top gate 312.

[0050] The second output end 22 is the first drain 263 , and the first output end 23 is the second drain 273 .

[0051] The second signal line 24 and the third signal line 25 are used to alternately provide a third level when the first signal line 1 provides a first level signal, so that the first switch 26 and the second switch 27 are alternately turned on.

[0052] Specifically, when the first signal line 1 provides a first level signal and the second signal line 24 provides the third level, the first source 262 and the first drain 263 are electrically connected, and then the first switch 26 is turned on, and the first level signal of the first signal line 1 is provided to the bottom gate 311, so that the bottom gate 311 works; when the first signal line 1 provides a first level signal and the third signal line 25 provides the third level, the second source 272 and the second drain 273 are electrically connected, and then the second switch 27 is turned on, and the first level signal of the first signal line 1 is provided to the top gate 312, so that the top gate 312 works.

[0053] The second signal line 24 and the third signal line 25 alternately provide the third level when the first signal line 1 provides the first level signal, so that when the first signal line 1 provides the first level signal, the first level signal is alternately provided to the bottom gate 311 and the top gate 312, thereby achieving the purpose of making the dual gates of the driving control module 3 work alternately.

[0054] It should be noted that the third level in the present application merely refers to a level at which the first gate 261 or the second gate 271 can operate, including but not limited to one level value or multiple level values.

[0055] Optionally, both the first switch 26 and the second switch 27 are thin film transistors, including but not limited to N-type thin film transistors or P-type thin film transistors. In the embodiments of the present application, the first switch 26 and the second switch 27 are both N-type thin film transistors for illustration, which should not be construed as a limitation to the present application.

[0056] Please refer to Figure 3 , Figure 3 1 is a schematic diagram of a driving circuit structure provided in Embodiment 3 of the present application. The driving circuit 1000 further includes a first pull-down module 4, the first pull-down module 4 is electrically connected to the bottom gate 311 and the top gate 312, the first pull-down module 4 is used to ground the top gate 312 or electrically connect it to a common potential when the bottom gate 311 is working, and the first pull-down module 4 is also used to ground the bottom gate 311 or electrically connect it to a common potential when the top gate 312 is working.

[0057] When the bottom gate 311 is working, the first pull-down module 4 can ground the top gate 312 or electrically connect it to a common potential to clear the voltage or current in the top gate 312, thereby ensuring that the top gate 312 does not work when the bottom gate 311 is working. Similarly, when the top gate 312 is working, the first pull-down module 4 can ground the bottom gate 311 or electrically connect it to a common potential to clear the voltage or current in the bottom gate 311, thereby ensuring that the bottom gate 311 does not work when the top gate 312 is working.

[0058] For details, please refer to Figure 3 , the first pull-down module 4 includes a third switch 41 and a fourth switch 42. The third switch 41 has a third gate 411, a third source 412 and a third drain 413, and the fourth switch 42 has a fourth gate 421, a fourth source 422 and a fourth drain 423. The third gate 411 is electrically connected to the second signal line 24, the third source 412 is electrically connected to the top gate 312, the third drain 413 is used for grounding or electrically connected to a common potential, the fourth gate 421 is electrically connected to the third signal line 25, the fourth source 422 is electrically connected to the bottom gate 311, and the fourth drain 423 is used for grounding or electrically connected to a common potential.

[0059] Further, when the first signal line 1 provides a first level signal and the second signal line 24 provides the third level, the bottom gate 311 works, the third switch 41 is turned on, and the third source 412 is electrically connected to the third drain 413, so that the top gate 312 is grounded or electrically connected to a common potential, thereby ensuring that the top gate 312 does not work; when the first signal line 1 provides a first level signal and the third signal line 25 provides the third level, the top gate 312 works, the fourth switch 42 is turned on, and the fourth source 422 is electrically connected to the fourth drain 423, so that the bottom gate 311 is grounded or electrically connected to a common potential, thereby ensuring that the bottom gate 311 does not work.

[0060] Optionally, the third switch 41 and the fourth switch 42 are both thin film transistors, including but not limited to N-type thin film transistors or P-type thin film transistors. In the embodiments of the present application, the third switch 41 and the fourth switch 42 are both N-type thin film transistors for illustration, which should not be construed as a limitation to the present application.

[0061] Please refer to Figure 4 , Figure 41 is a schematic diagram of a driving circuit structure provided in Embodiment 4 of the present application. The driving circuit 1000 further includes a second pull-down module 5 and a pull-down voltage line 51. The second pull-down module 5 is electrically connected to the first gate 261 and the second gate 271, respectively, and the second pull-down module 5 is used to electrically connect the second gate 271 to the pull-down voltage line 51 when the first switch 26 is turned on, so that the second switch 27 is turned off. The second pull-down module 5 is also used to electrically connect the first gate 261 to the pull-down voltage line 51 when the second switch 27 is turned on, so that the first switch 26 is turned off.

[0062] In this embodiment, the pull-down voltage line 51 is a low-level signal line, and the first switch 26 and the second switch 27 are N-type thin film transistors, that is, when the first gate 261 of the first switch 26 is electrically connected to the pull-down voltage line 51, the first switch 26 is closed, and when the second gate 271 of the second switch 27 is electrically connected to the pull-down voltage line 51, the second switch 27 is closed.

[0063] When the first signal line 1 provides a first level signal and the second signal line 24 provides the third level, the first switch 26 is turned on, the bottom gate 311 works, and the second pull-down module 5 electrically connects the second gate 271 to the pull-down voltage line 51 to close the second switch 27, ensuring that the top gate 312 does not work; when the first signal line 1 provides a first level signal and the third signal line 25 provides the third level, the second switch 27 is turned on, the top gate 312 works, and the second pull-down module 5 electrically connects the first gate 261 to the pull-down voltage line 51 to close the first switch 26, ensuring that the bottom gate 311 does not work.

[0064] For details, please refer to Figure 4 The second pull-down module 5 includes a fifth switch 52 and a sixth switch 53, the fifth switch 52 has a fifth gate 521, a fifth source 522 and a fifth drain 523, the sixth switch 53 has a sixth gate 531, a sixth source 532 and a sixth drain 533, the fifth gate 521 is electrically connected to the second signal line 24, the fifth source 522 is electrically connected to the pull-down voltage line 51, the fifth drain 523 is electrically connected to the third signal line 25, the sixth gate 531 is electrically connected to the third signal line 25, the sixth source 532 is electrically connected to the pull-down voltage line 51, and the sixth drain 533 is electrically connected to the second signal line 24.

[0065] Further, when the first signal line 1 provides a first level signal and the second signal line 24 provides the third level, the first switch 26 is turned on, the bottom gate 311 works, the fifth gate 521 works, and the fifth source 522 is electrically connected to the fifth drain 523, so that the pull-down voltage line 51 is electrically connected to the third signal line 25, and then the second switch 27 is closed, ensuring that the top gate 312 does not work; when the first signal line 1 provides a first level signal and the third signal line 25 provides the third level, the second switch 27 is turned on, the top gate 312 works, the sixth gate 531 works, and the sixth source 532 is electrically connected to the sixth drain 533, so that the pull-down voltage line 51 is electrically connected to the second signal line 24, and then the first switch 26 is closed, ensuring that the bottom gate 311 does not work.

[0066] Please refer to Figure 5 and Figure 6 , Figure 5 is a schematic diagram of a driving circuit structure provided in Embodiment 5 of the present application, Figure 6 1 is a timing diagram of a driving circuit structure provided in Embodiment 5 of the present application. In one embodiment, the driving circuit 1000 is arranged in a non-display area of ​​a display panel. The working phases of the driving circuit 1000 include a charging phase T1, a driving phase T2 and a reset phase T3. The first level signal includes a first sub-level and a second sub-level. The driving control module 3 also includes a driving drain 313.

[0067] The driving circuit 1000 further includes a charging module 6 and a capacitor 10, wherein the charging module 6 is electrically connected to the first signal line 1. The capacitor 10 has a first capacitor terminal 101 and a second capacitor terminal 102, wherein the first capacitor terminal 101 is electrically connected to the first signal line 1, and the second capacitor terminal 102 is electrically connected to the driving drain 313.

[0068] In the charging stage T1 , the charging module 6 provides the first sub-level to the first signal line 1 to enable the driving control module 3 to operate.

[0069] The charging module 6 has a charging switch 611 , and the charging switch 611 is used to be turned on at the first sub-level.

[0070] Please refer to Figure 5 and Figure 6 The driving circuit 1000 also includes a driving signal input terminal 61 and a driving signal output terminal 7, and the driving control module 3 also includes a driving source 31, the driving source 314 is electrically connected to the driving signal input terminal 61, and the driving drain 313 is electrically connected to the driving signal output terminal 7.

[0071] In the driving stage T2, the driving signal input terminal 61 provides a driving level to the driving source 31, and the first sub-level in the first signal line 1 changes to a second sub-level, and the second sub-level is higher than the first sub-level. The driving control module 3 is used to provide the driving level to the driving signal output terminal 7 in the driving stage T2.

[0072] It should be noted that, during the charging stage T1, the first sub-level of the first signal line 1 can be stored in the first capacitor terminal. During the driving stage T2, the charging module 6 can stop working, and the driving signal input terminal 61 provides a driving level. Under the capacitive coupling of the driving control module 3, the first sub-level in the first signal line 1 can jump to the second sub-level, and the level value V2 of the second sub-level = (the level value V1 of the first sub-level + the level value V3 of the driving level) / 2, and the conduction capability of the driving control module 3 is enhanced.

[0073] Please refer to Figure 5 and Figure 6 The driving circuit 1000 further includes a reset module 8, the reset module 8 is electrically connected to the first signal line 1 and the driving signal output terminal 7; the reset module 8 is used to reset the first signal line 1 and the driving signal output terminal 7 in the reset stage T3. The driving circuit 1000 further includes a reset voltage line 81, the reset module 8 is electrically connected to the reset voltage line 81, the first signal line 1 and the driving signal output terminal 7 respectively.

[0074] In the driving stage T2, the reset module 8 is internally turned on so that the first signal line 1 and the driving signal output terminal 7 are electrically connected to the reset voltage line 81 to reset the voltage of the first signal line 1 and the driving signal output terminal 7.

[0075] Specifically, the reset module 8 further includes a seventh switch 82, an eighth switch 83 and a reset signal line 84, the seventh switch 82 includes a seventh gate 821, a seventh source 822 and a seventh drain 823, and the eighth switch 83 includes an eighth gate 831, an eighth source 832 and an eighth drain 833. The seventh gate 821 is electrically connected to the reset signal line 84, the seventh source 822 is electrically connected to the first signal line 1, and the seventh drain 823 is electrically connected to the reset voltage line 81; the eighth gate 831 is electrically connected to the reset signal line 84, the eighth source 832 is electrically connected to the drive signal output terminal 7, and the eighth drain 833 is electrically connected to the reset voltage line 81.

[0076] In this embodiment, the reset voltage line 81 is a low-level signal line. When the first signal line 1 is electrically connected to the reset voltage line 81, the drive control module 3 does not work. When the drive signal output terminal 7 is electrically connected to the reset voltage line 81, the drive signal output terminal 7 does not work. It should be noted that in this embodiment, the pull-down voltage line 51 and the reset voltage line 81 are taken as the same signal line for illustration. In other embodiments, the pull-down voltage line 51 and the reset voltage line 81 may also be different signal lines, and the present application does not limit this.

[0077] Further, when the reset signal line 84 provides a reset signal, the seventh drain 823 works, the seventh source 822 is electrically connected to the seventh drain 823, and the first signal line 1 is electrically connected to the reset voltage line 81, so that the drive control module 3 does not work; and when the reset signal line 84 provides a reset signal, the eighth drain 833 works, the eighth source 832 is electrically connected to the eighth drain 833, and the drive signal output terminal 7 is electrically connected to the reset voltage line 81, so that the drive signal output terminal 7 does not work.

[0078] It should be noted that, in this embodiment, the driving circuit 1000 is taken as an example of the driving circuit of one row of the gate driving circuit. In this embodiment, the level provided by the charging module 6 of the row is input as the level at the driving signal output terminal 7 of the previous row, and the level provided by the reset module 8 of the row is input as the level at the driving signal output terminal 7 of the next row. In addition, each row of the driving circuit in the gate driving circuit has multiple driving cycles, and each driving cycle includes a charging stage T1, a driving stage T2 and a reset stage T3. In one embodiment, the level timing of the second signal line 24 and the third signal line 25 can be controlled so that in the first driving cycle, one of the bottom gate 311 or the top gate 312 works, and in the next driving cycle, the other of the bottom gate 311 or the top gate 312 works, and they work alternately in sequence to achieve an improvement in the threshold voltage V TH Drift phenomenon.

[0079] Please refer to Figure 7 , Figure 71 is a schematic diagram of a driving circuit structure provided in Embodiment 6 of the present application. In one embodiment, the driving circuit 1000 is arranged in the display area of ​​the display panel. The driving circuit 1000 also includes a light-emitting unit 90 and a data line 91. The first signal line 1 is a scan line, and the driving control module 3 also includes a driving source 314 and a driving drain 313, the driving source 314 is electrically connected to the data line 91, and the driving drain 313 is electrically connected to the light-emitting unit 90.

[0080] Specifically, after the first signal line 1 provides the first level signal, the selection switch module 2 alternately provides the first level signal to the bottom gate 311 and the top gate 312, so that the top gate 312 or the bottom gate 311 works alternately, and the driving control module 3 works to provide the data signal of the data line 91 to the light-emitting unit 90 to drive the light-emitting unit 90 to emit light. The alternating operation of the dual gates can reduce the charge accumulation in the gate insulating layer caused by voltage stress during the long-term operation of the driving control module 3, thereby effectively improving the threshold voltage V TH drift, reducing or even eliminating the threshold voltage V TH The impact on data signals can improve the uneven display of the display panel.

[0081] When the driving circuit 1000 is provided in the data circuit of the display panel, each row scanning line in the data circuit has a plurality of scanning cycles, each scanning cycle includes a charging phase T1, a driving phase T2 and a reset phase T3. In one embodiment, the level timing of the second signal line 24 and the third signal line 25 can be controlled so that in the first scanning cycle, one of the bottom gate 311 or the top gate 312 works, and in the next scanning cycle, the other of the bottom gate 311 or the top gate 312 works, and the two work alternately in sequence, so as to improve the threshold voltage V TH The drift phenomenon is eliminated, thereby improving the uneven display of the display panel.

[0082] Please refer to Figure 8 , Figure 8 1 is a schematic diagram of a display panel provided in Embodiment 7 of the present application. The present application also provides a display panel 100, and the display panel 100 includes the above-mentioned driving circuit 1000. The display panel 100 includes but is not limited to being applied to electronic devices such as mobile phones.

[0083] The above is part of the implementation methods 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 are also considered to be within the scope of protection of the present application.

Claims

1. A driving circuit, applied to a display panel, characterized in that: The driving circuit comprises: A first signal line, used for providing a first level signal or a second level signal; A selection switch module, the selection switch module comprising a signal input terminal, a first output terminal and a second output terminal, the signal input terminal being electrically connected to the first signal line; a drive control module, the drive control module comprising a bottom gate and a top gate, the first output terminal being electrically connected to the top gate, the second output terminal being electrically connected to the bottom gate, the selection switch module outputting the first level signal to the top gate or the bottom gate through the first output terminal or the second output terminal, so that the top gate and the bottom gate work alternately; the drive control module is used to not work when the first signal line provides the second level signal; and A first pull-down module, wherein the first pull-down module is electrically connected to the bottom gate and the top gate, respectively, and the first pull-down module is used to ground the top gate or electrically connect it to a common potential when the bottom gate is working, and to ground the bottom gate or electrically connect it to a common potential when the top gate is working.

2. The driving circuit according to claim 1, characterized in that: The selection switch module includes a second signal line, a third signal line, a first switch and a second switch, the first switch has a first gate, a first source and a first drain, the second switch has a second gate, a second source and a second drain, the first gate is electrically connected to the second signal line, the second gate is electrically connected to the third signal line, the first source and the second source are both electrically connected to the first signal line, the first drain is electrically connected to the bottom gate, and the second drain is electrically connected to the top gate; The second output terminal is the first drain, and the first output terminal is the second drain; The second signal line and the third signal line are used to alternately provide a third level when the first signal line provides the first level signal, so that the first switch and the second switch are alternately turned on.

3. The driving circuit according to claim 2, characterized in that: The first pull-down module includes a third switch and a fourth switch, the third switch has a third gate, a third source and a third drain; the third gate is electrically connected to the second signal line, the third source is electrically connected to the top gate, and the third drain is used for grounding or electrically connected to a common potential, and the fourth switch has a fourth gate, a fourth source and a fourth drain, the fourth gate is electrically connected to the third signal line, the fourth source is electrically connected to the bottom gate, and the fourth drain is used for grounding or electrically connected to a common potential.

4. The driving circuit according to claim 2, characterized in that: The driving circuit also includes a second pull-down module and a pull-down voltage line, the second pull-down module is electrically connected to the first gate and the second gate respectively, the second pull-down module is used to electrically connect the second gate to the pull-down voltage line when the first switch is turned on, so that the second switch is turned off; the second pull-down module is also used to electrically connect the first gate to the pull-down voltage line when the second switch is turned on, so that the first switch is turned off.

5. The driving circuit according to claim 4, characterized in that: The second pull-down module includes a fifth switch and a sixth switch, the fifth switch having a fifth gate, a fifth source and a fifth drain, the fifth gate being electrically connected to the second signal line, the fifth source being electrically connected to the pull-down voltage line, and the fifth drain being electrically connected to the third signal line, the sixth switch having a sixth gate, a sixth source and a sixth drain, the sixth gate being electrically connected to the third signal line, the sixth source being electrically connected to the pull-down voltage line, and the sixth drain being electrically connected to the second signal line.

6. The driving circuit according to any one of claims 2 to 4, characterized in that: The driving circuit is arranged in the non-display area of ​​the display panel; the first level signal includes a first sub-level and a second sub-level; the driving control module also includes a driving drain; The driving circuit further includes a charging module and a capacitor, wherein the charging module is electrically connected to the first signal line, and the capacitor includes a first capacitor terminal and a second capacitor terminal, wherein the first capacitor terminal is electrically connected to the first signal line, and the second capacitor terminal is electrically connected to the driving drain; The charging module is used for providing the first sub-level to the first signal line in a charging stage to enable the driving control module to operate.

7. The driving circuit according to claim 6, characterized in that: The driving circuit further includes a driving signal input terminal and a driving signal output terminal, and the driving control module further includes a driving source electrode, the driving source electrode is electrically connected to the driving signal input terminal, and the driving drain electrode is electrically connected to the driving signal output terminal; The driving signal input terminal is used to provide a driving level to the driving source electrode in a driving stage, so that the first sub-level in the first signal line changes to a second sub-level, and the second sub-level is higher than the first sub-level; The driving control module is used for providing the driving level to the driving signal output terminal during the driving stage; The driving circuit further includes a reset module, which is electrically connected to the first signal line and the driving signal output end; the reset module is used to reset the first signal line and the driving signal output end in a reset phase.

8. The driving circuit according to any one of claims 1 to 5, characterized in that: The driving circuit is arranged in the display area of ​​the display panel; the driving circuit also includes a light-emitting unit and a data line, the first signal line is a scan line, and the driving control module also includes a driving source and a driving drain, the driving source is electrically connected to the data line, and the driving drain is electrically connected to the light-emitting unit.

9. A display panel, characterized in that: The driving circuit comprises the driving circuit described in any one of claims 1 to 8.

Images