Display panel, display module and driving method

Abstract

The application relates to a display panel, a display module and a driving method. The display panel comprises a power signal line, a power management chip, a current detection module, a gating control module and an optional load module. The power signal line is loaded with an electric signal based on the power management chip. The gating control module is connected between the optional load module and the power signal line. The optional load module is connected to the power signal line under the control of the gating control module. The current detection module is used for detecting a first current loaded on the power signal line and controlling the gating control module to be turned on when the first current is less than a set threshold value, so as to connect the optional load module to the power signal line. Thus, when the first current loaded on the power signal line is less than the set threshold value, the optional load module is connected to the power signal line by using the gating module, so that the load is increased, the power management chip is prevented from entering a pulse frequency modulation mode under light load display, display water ripples are eliminated, and the display effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel, a display module and a driving method. BACKGROUND

[0002] An organic light emitting diode (OLED) is a current-driven light emitting device, which is widely used in display devices such as mobile phones and tablet computers due to its self-luminous, fast response, wide viewing angle and flexibility.

[0003] The OLED display panel of the display device can adopt different image refresh frequencies for display in different application scenarios. For example, in the application scenarios of displaying dynamic pictures such as games and videos, the OLED display panel adopts a high-frequency mode, in which the OLED display panel displays at a higher image refresh frequency to ensure the smoothness of the display picture; in the application scenarios of displaying static pictures such as e-books, the OLED display panel adopts a low-frequency mode, in which the OLED display panel adopts a lower image refresh frequency to reduce the power consumption of the OLED display panel. However, in the low-current driving scenario of the low-frequency mode, the power management chip enters a pulse frequency modulation (PFM) mode, and the voltage on the power signal line fluctuates, resulting in differences in the brightness of the display picture and forming water ripples, which affects the display effect. SUMMARY

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a display panel, a display module and a driving method.

[0005] The present application provides a display panel, which comprises a power signal line and a power management chip, the power signal line loads an electrical signal based on the power management chip; the display panel further comprises a current detection module, a gating control module and an optional load module;

[0006] The gating control module is connected between the optional load module and the power signal line, and the optional load module is connected to the power signal line under the control of the gating control module;

[0007] The current detection module is configured to detect a first current loaded on the power signal line, and control the gating control module to be turned on when the first current is less than a set threshold, so as to connect the optional load module to the power signal line.

[0008] Based on the same inventive concept, the application further provides a display module comprising the display panel.

[0009] Based on the same inventive concept, the application further provides a driving method applied to the display panel; the driving method comprises:

[0010] detecting a first current loaded on the power signal line based on the current detection module;

[0011] controlling the gating control module to be turned on to connect the optional load module to the power signal line when the first current is less than a set threshold.

[0012] Compared with the related art, the technical solution provided by the application has the following advantages:

[0013] The display panel provided by the application comprises a power signal line and a power management chip, the power signal line loads an electrical signal based on the power management chip; the display panel further comprises a current detection module, a gating control module and an optional load module; the gating control module is connected between the optional load module and the power signal line, and the optional load module is controlled by the gating control module to be connected to the power signal line; wherein the current detection module is used to detect a first current loaded on the power signal line, and control the gating control module to be turned on to connect the optional load module to the power signal line when the first current is less than a set threshold, so that the optional load module is connected to the power signal line by using the gating module to control the optional load module to access the power signal line when the first current loaded on the power signal line is less than the set threshold, thereby increasing the load, avoiding the power management chip from entering the pulse frequency modulation mode under light load display, eliminating water ripples and improving the display effect. BRIEF DESCRIPTION OF DRAWINGS

[0014] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and serve to explain the principles of the application together with the specification.

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the application or the related art, the accompanying drawings needed to be used in the embodiments or the related art description will be briefly introduced here. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0016] Figure 1 A structural schematic diagram of a display panel provided by the embodiments of the application;

[0017] Figure 2 A structural schematic diagram of a pixel driving circuit provided by the embodiments of the application;

[0018] Figure 3A pixel driving timing diagram provided for an embodiment of the present application;

[0019] Figure 4 A structure diagram of another display panel provided for an embodiment of the present application;

[0020] Figure 5 A structure diagram of another display panel provided for an embodiment of the present application;

[0021] Figure 6 A structure diagram of another display panel provided for an embodiment of the present application;

[0022] Figure 7 A structure diagram of another display panel provided for an embodiment of the present application;

[0023] Figure 8 A structure diagram of another display panel provided for an embodiment of the present application;

[0024] Figure 9 A structure diagram of another display panel provided for an embodiment of the present application;

[0025] Figure 10 A structure diagram of another display panel provided for an embodiment of the present application;

[0026] Figure 11 A structure diagram of another display panel provided for an embodiment of the present application;

[0027] Figure 12 A structure diagram of another display panel provided for an embodiment of the present application;

[0028] Figure 13 A structure diagram of another display panel provided for an embodiment of the present application;

[0029] Figure 14 A structure diagram of another display panel provided for an embodiment of the present application;

[0030] Figure 15 A structure diagram of another display panel provided for an embodiment of the present application;

[0031] Figure 16 A structure diagram of another display panel provided for an embodiment of the present application;

[0032] Figure 17 A structure diagram of a display module provided for an embodiment of the present application;

[0033] Figure 18 A structure diagram of another display module provided for an embodiment of the present application;

[0034] Figure 19 A flowchart of a driving method provided by an embodiment of the present application is shown.

[0035] 10, display panel; 11, power signal line; 12, power management chip; DA, non-display area; AA, display area; FO, fan-out area; M1-M7, transistors in pixel driving circuit; Emit, light-emitting control signal; ScanN1, first scanning signal; ScanN2, second scanning signal; ScanP, third scanning signal; 13, current detection module; 14, gating control module; 141, gating control module one; 142, gating control module two; 143, gating control module three; 15, optional load module; 151, optional load module one; 152, optional load module two; 153, optional load module three; 16, display driving circuit; 17, wire; M0, controlled switch tube; M00, control end; M01, first end; M02, second end; R, resistor; C, capacitor; 011, substrate; 012, buffer layer; 013, active layer; 014, gate insulating layer; 015, first metal layer; 016, capacitor insulating layer; 017, capacitor metal layer; 018, interlayer insulating layer; 019, second metal layer; 020, passivation layer; 021, planarization layer; 022, reflective metal layer; 023, pixel definition layer; 024, light-emitting layer; 027, cathode layer; 025, support layer; 026, protective layer; 20, display module; 21, light-emitting element; 22, pixel driving circuit; 23, flexible circuit board; 24, rigid circuit board. DETAILED DESCRIPTION

[0036] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0037] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein; obviously, the embodiments in the description are only some of the embodiments of the present application, not all the embodiments.

[0038] Figure 1 A structural diagram of a display panel provided by an embodiment of the present application is shown. Referring to Figure 1 The display panel includes 10 including a display area AA and a non-display area DA arranged at least one side of the display area AA; Figure 1 The non-display area DA is arranged around the display area AA in the example shown in the figure, but in other embodiments, the non-display area DA can also be arranged at one side, adjacent two sides, opposite two sides or other arbitrary edge side combination of the display area AA, which is not limited herein.

[0039] Exemplarily, the display area AA can include an array of pixel regions, each of which can be provided with a pixel and a pixel driving circuit for providing a driving signal to the pixel. The pixel is controlled to emit light by the pixel driving circuit, and the array of pixels cooperates to realize display of a target display picture.

[0040] Exemplarily, the structure of the pixel driving circuit can be as shown in Figure 2 The corresponding pixel driving timing can be as shown in Figure 3 , wherein M1-M7 are all crystal switches (for example, thin film transistors); ScanN1, ScanN2 and ScanP are all scanning signals, which are used to open the corresponding crystal switches at different stages in the scanning timing to realize transmission of the corresponding signals; Emit is a light-emitting control signal, data is a data signal, PVDD is a first power signal, PVEE is a second power signal, Vref1 is a first reference power signal, and Vref2 is a second reference power signal. In combination with Figure 2 and Figure 3 , the crystal switches M1-M7 can all be low-level conduction switches; ScanN1 is at a low level, corresponding to an initialization stage; ScanN2 is at a low level, corresponding to a data writing stage, which also includes ScanP at a low level, and the anode of the OLED is initialized by the second reference power signal Vref2 to avoid the influence of the previous frame on the current frame display; Emit is at a low level, corresponding to a light-emitting stage, that is, the OLED emits light, thus realizing OLED light-emitting control. It should be noted that M1-M7 can also be specifically selected to be high-level conduction switches (for example, N-type transistors) according to design needs, or part of them are high-level conduction switches and part of them are low-level conduction switches (for example, P-type transistors), which are not limited by the present application.

[0041] , wherein the scanning signal, the light-emitting control signal and the power signal are all provided based on corresponding signal lines, and the above-mentioned signal lines can be extended from the non-display area DA to the display area AA and connected to the corresponding pixel driving circuit. The scanning signal and the light-emitting control signal can be provided by a shift register circuit, and the power signal can be provided by a power management chip (Power Management IC, PMIC).

[0042] Exemplarily, continuing to refer to Figure 1 , the display panel 10 can further include a power signal line 11 and a power management chip 12; wherein the power signal line 11 loads an electrical signal based on the power management chip 12 to transmit the corresponding power signal to the pixel driving circuit.

[0043] Exemplarily, in the related art, when the OLED display panel is in a low-frequency mode and displays a light load (for example, 2nitL32) picture, the PMIC enters the PFM mode, and a 720hz ripple is generated on the PVEE. The voltage fluctuation causes a brightness difference in the frame brightness, and water ripples are formed.

[0044] To this end, an embodiment of the present application provides a display panel. An optional load module is connected to the power signal line through a gating control. A current detection module is used to detect a first current loaded on the power signal line. When the first current is less than a set threshold, the gating control module is turned on to connect the optional load module to the power signal line. In this way, the load is increased, the power management chip is prevented from entering the PFM mode in the light load display, the power signal is not fluctuated, the brightness difference in the frame brightness is avoided, and the display water ripples are eliminated, thereby improving the display effect.

[0045] Exemplarily, Figure 4 Another structure diagram of a display panel provided by an embodiment of the present application is provided. In combination with Figure 1 and Figure 4 The display panel 10 further includes a current detection module 13, a gating control module 14, and an optional load module 15. The gating control module 14 is connected between the optional load module 15 and the power signal line 11. The optional load module 15 is connected to the power signal line 11 under the control of the gating control module 14. The current detection module 13 is used to detect a first current loaded on the power signal line 11 and control the gating control module 14 to be turned on when the first current is less than a set threshold, so as to connect the optional load module 15 to the power signal line 11.

[0046] The set threshold is used to measure the size of the first current. When the first current is equal to or greater than the set threshold, it indicates that the first current is large, and the corresponding OLED display panel can be normally displayed without the need of an additional optional load module 15. When the first current is less than the set threshold, it indicates that the first current is small. In order to avoid the display water ripples that may be generated, the gating control module 14 is turned on through the current detection module 13, so as to connect the optional load module 15 to the power signal line 11 to increase the load, prevent the power management chip 12 from entering the PFM mode, avoid the voltage fluctuation of the power signal, and eliminate the display water ripples. The specific size of the set threshold can be set based on the requirements of the display panel, which is not limited herein.

[0047] The optional load module 15 can be selectively connected to the power signal line 11, and is selectively connected to the power signal line 11 under the control of the gating control module 14. The gating control module 14 is controlled by the current detection module 13 to switch between the on and off states.

[0048] In the display panel 10 provided by the embodiment of the present application, the current detection module 13 can detect the first current loaded on the power signal line 11, and control the gating control module 14 to be turned on when the first current is less than the set threshold, so as to connect the optional load module 15 to the power signal line 11, which is equivalent to increasing the load connected to the power signal line 11, thereby avoiding the power management chip 12 from entering the pulse frequency modulation mode under the light load display, so that the power signal is not fluctuated, the frame brightness does not exist the brightness difference, and thus the display water ripples are eliminated and the display effect is improved.

[0049] In the above embodiment, the current detection module 13 can be a circuit module for detecting the first current loaded on the power signal line 11, which is additionally provided on the basis of the structure of the display panel in the related art, or can be realized by using the original circuit module in the structure of the display panel in the related art, which will be described below.

[0050] In some embodiments, Figure 5 Another structure diagram of a display panel provided by the embodiment of the present application is provided. In combination with Figure 1 and Figure 5 The display panel 10 further includes a display driving circuit 16, and the current detection module 13 is arranged in the display driving circuit 16. The display driving circuit 16 detects the first current loaded on the power signal line 11, and controls the gating control module 14 to be turned on when the first current is less than the set threshold.

[0051] In the display panel 10 provided by the embodiment of the present application, the current detection module 13 can detect the first current loaded on the power signal line 11, and control the gating control module 14 to be turned on when the first current is less than the set threshold, so as to connect the optional load module 15 to the power signal line 11, which is equivalent to increasing the load connected to the power signal line 11, thereby avoiding the power management chip 12 from entering the pulse frequency modulation mode under the light load display, so that the power signal is not fluctuated, the frame brightness does not exist the brightness difference, and thus the display water ripples are eliminated and the display effect is improved.

[0052] In the display panel 10 provided by the embodiment of the present application, the current detection module 13 can detect the first current loaded on the power signal line 11, and control the gating control module 14 to be turned on when the first current is less than the set threshold, so as to connect the optional load module 15 to the power signal line 11, which is equivalent to increasing the load connected to the power signal line 11, thereby avoiding the power management chip 12 from entering the pulse frequency modulation mode under the light load display, so that the power signal is not fluctuated, the frame brightness does not exist the brightness difference, and thus the display water ripples are eliminated and the display effect is improved.

[0053] In some embodiments, a circuit module with current detection function can also be provided independently of the display driving circuit, which can be, for example, an ammeter; and the threshold value output first current associated control signal is set by the jig ammeter reference, and the control of the on-off control module is controlled.

[0054] In some embodiments, Figure 6 Another structure schematic diagram of a display panel is provided in an embodiment of the present application. Figure 1 On the basis of the above, referring to Figure 6 In the display panel 10, the on-off control module 14 includes a controlled switch tube M0; the control end M00 of the controlled switch tube M0 is connected to the control signal output by the current detection module 13, the first end M01 of the controlled switch tube M0 is connected to the power signal line 11, and the second end M02 of the controlled switch tube M0 is connected to the optional load module 15; and the controlled switch tube M0 is used to be turned on under the control of the target control signal output by the current detection module 13, so as to connect the optional load module 15 and the power signal line 11.

[0055] The control signal output by the current detection module 13 can include an on control signal and an off control signal, and the above-mentioned target control signal is the on control signal. Specifically, when the detected first current is less than the set threshold value, the current detection module 13 outputs the on control signal to control the on between the first end M01 and the second end M02 of the controlled switch tube M0, that is, the on-off control module 14 is turned on, and at this time the optional load module 15 is connected to the power signal line 11.

[0056] The controlled switch tube M0 can be a metal-oxide-semiconductor field effect transistor, or other types of controlled switch tubes that can be integrated into the film layer structure of the display panel, such as low-temperature polysilicon thin film transistors or amorphous silicon thin film transistors, wherein the controlled switch tube M0 can be selected as an N-type or P-type transistor according to actual needs, which is not limited in the present application.

[0057] In an embodiment of the present application, the on-off control module 14 includes the controlled switch tube M0, and the selective connection between the optional load module 15 and the power signal line 11 is controlled based on whether the controlled switch tube M0 is turned on or not, which can realize the switching control function based on a relatively simple circuit component structure, save the space required for circuit layout, and be easily integrated with the film layer structure of the display panel without increasing the complexity of the film layer of the display panel.

[0058] In some embodiments, Figure 7 Another structure schematic diagram of a display panel is provided in an embodiment of the present application. Figure 1 On the basis of the above, referring to Figure 7The optional load module 15 in the display panel 10 includes a resistor R; one end of the resistor R is connected to the gate control module 14, and the other end of the resistor R is connected to a fixed potential.

[0059] For example, the fixed potential can be ground, that is, the other end of the resistor R can be grounded. The resistor is a relatively simple circuit component for the load.

[0060] In the embodiments of the present application, the specific implementation of the optional load module 15 can be a resistor R, so that the load function of the optional load module 15 can be realized based on a relatively simple circuit component structure; and it is easy to be integrated with the film layer structure of the display panel without increasing the complexity of the film layer of the display panel.

[0061] In some embodiments, Figure 8 Another structure diagram of a display panel is provided in the embodiments of the present application. In Figure 7 , reference is made to Figure 8 , the optional load module 15 further includes a capacitor C; the capacitor C is connected in parallel with the resistor R.

[0062] The capacitor C and the resistor R form an RC circuit to improve the stability of the optional load module 15.

[0063] For example, in combination with Figure 6 and Figure 8 , the gate control module 14 includes a controlled switch tube M0, which can be a transistor that is turned on at a low level and turned off at a high level; the optional load module 15 includes a resistor R and a capacitor C, that is, RC. Based on this, when the first current detected by the current detection module 13 is less than the set threshold, the on control signal output by the current detection module 13 can be a low-level signal, for example, a VGL signal, at this time the controlled switch tube M0 is turned on, and the RC is connected to the power signal line 11; when the first current detected by the current detection module 13 is equal to or greater than the set threshold, the off control signal output by the current detection module 13 can be a high-level signal, for example, a VGH signal, at this time the controlled switch tube M0 is turned off, and the display panel is normally turned on.

[0064] In other embodiments, the controlled switch tube M0 can also be turned on based on a high-level signal and turned off based on a low-level signal, which is not limited here.

[0065] In other embodiments, the gate control module 14 can also include other circuit components, which can realize the function of the controlled switch; and / or the optional load module 15 can also include other circuit components, which can realize the function of the load, which is not limited here.

[0066] In some embodiments, Figure 9 Another structure diagram of a display panel is provided in the embodiments of the present application, which shows the film layer structure of the display panel. Reference is made toFigure 9 The display panel can include a substrate 011, and a buffer layer 012, an active layer 013, a gate insulating layer 014, a first metal layer 015, a capacitor insulating layer 016, a capacitor metal layer 017, an interlayer insulating layer 018, a second metal layer 019, a passivation layer 020, a planarization layer 021, a reflective metal layer 022, a pixel definition layer 023, a light emitting layer 024, a cathode layer 027, a support layer 025, and a protective layer 026 which are arranged in a stack on one side of the substrate 011; wherein the active layer 013, the first metal layer 015, the capacitor metal layer 017, the second metal layer 019, and the reflective metal layer 022 can be used as a conductor layer, and can be patterned to form a conductor structure, such as at least one of a signal line, a resistor, and an electrode layer of a capacitor.

[0067] In other embodiments, the display panel can further include other conductor layers, such as a conductor layer for power line switching, which is not limited herein.

[0068] Based on this, for the display panel 10 shown in FIG. 1, the display panel 10 can further include a substrate 011, and a functional film layer which is arranged in a stack on one side of the substrate 011; at least part of the functional film layers used to form the resistor R and the functional film layers used to form the power signal line 11 are arranged in the same layer. Figure 7 The optional load module 15 shown in FIG. 1 includes a resistor R structure, and the display panel 10 further includes a substrate 011 and a functional film layer arranged in a stack on one side of the substrate 011; at least part of the functional film layers used to form the resistor R and the functional film layers used to form the power signal line 11 are arranged in the same layer.

[0069] Exemplarily, the functional film layer can be the conductor layer described above.

[0070] The functional film layer used to form the power signal line 11 can be at least one of the conductor layers described above, and the functional film layer used to form the resistor R can be at least one of the conductor layers described above; and at least part of the functional film layers used to form the resistor R and the functional film layers used to form the power signal line 11 are arranged in the same layer; exemplarily, the functional film layer used to form the power signal line 11 includes at least the reflective metal layer 022, and the resistor R can be arranged in the reflective metal layer 022; or, the functional film layer used to form the power signal line 11 and the functional film layer used to form the resistor R have the same number of layers and the same film layer position relative to the substrate 011.

[0071] Thus, by using at least part of the film layers shared by the resistor R and the power signal line 11, the film layers are fully utilized; and it is beneficial to ensure that the overall number of film layers of the display panel is small, thereby reducing the corresponding number of processes.

[0072] In some embodiments, for the display panel 10 shown in FIG. 1, the display panel 10 can further include a substrate 011, and a functional film layer arranged in a stack on one side of the substrate 011; at least part of the functional film layers used to form the resistor R and the functional film layers used to form the power signal line 11 are arranged in the same layer. Figure 8The optional load module 15 shown includes a structure of a resistor R and a capacitor C, and the display panel 10 further includes a substrate 011 and a functional film layer stacked on one side of the substrate 011; the capacitor C includes a first electrode layer and a second electrode layer. Optionally, the functional film layer for forming the second electrode layer can be disposed in the same layer as at least part of the functional film layer for forming the power signal line 11 or the resistor R, and is distinguished from the first electrode layer; or the functional film layer for forming the second electrode layer is independent of the functional film layer for forming the power signal line 11 or the resistor R. Figure 9 The functional film layer disposed outside the conductor layer shown and additionally for forming the capacitor C in the optional load module 15 is not limited here.

[0073] Exemplarily, the functional film layer can be the conductor layer described above.

[0074] Among them, the functional film layer for forming the power signal line 11 can be at least one of the conductor layers described above, the functional film layer for forming the resistor R can be at least one of the conductor layers described above, and the functional film layer for forming the first electrode layer can be at least one of the conductor layers described above; and at least part of the functional film layers for forming the resistor R and the power signal line 11 are disposed in the same layer, and / or at least part of the functional film layers for forming the first electrode layer and the power signal line 11 are disposed in the same layer.

[0075] Exemplarily, the functional film layer for forming the power signal line 11 includes at least one of a reflective metal layer 022, a capacitor metal layer 017, and a second metal layer 019, the resistor R can be disposed in the reflective metal layer 022, and the first electrode layer can be disposed in the capacitor metal layer 017.

[0076] Alternatively, exemplarily, the number of layers and the film layer position relative to the substrate 011 of the functional film layer for forming the power signal line 11 and the functional film layer for forming the resistor R are the same; and / or the number of layers and the film layer position relative to the substrate 011 of the functional film layer for forming the power signal line 11 and the functional film layer for forming the first electrode layer are the same.

[0077] Therefore, by sharing at least part of the film layers among the resistor R, the capacitor C, and the power signal line 11, the film layers are fully utilized; and it is beneficial to ensure that the overall number of film layers of the display panel is relatively small, thereby reducing the corresponding number of processes,

[0078] In some embodiments, the capacitor C can also share at least part of the film layers with the storage capacitor, i.e., the first metal layer 015 and the capacitor metal layer 017 in the storage capacitor can be utilized here without limitation. Figure 9

[0079] In some embodiments, Figure 10 ​Fig. 2 shows a schematic diagram of another structure of a display panel according to an embodiment of the present application, Figure 11 Fig. 2 shows a schematic diagram of another structure of a display panel according to an embodiment of the present application. As shown in Fig. 2, Figure 10 Figure 11 The number of the gating control modules 14 is at least one, and the number of the optional load modules 15 is at least one. One gating control module 14 is connected to at least one optional load module 15. All the gating control modules 14 are connected to the current detection module 13.

[0080] For example, Figure 10 Figure 11 In the embodiment shown in Fig. 1, the number of the gating control modules 14 is two, which are respectively shown as a first gating control module 141 and a second gating control module 142. The number of the optional load modules 15 is three, which are respectively shown as a first optional load module 151, a second optional load module 152 and a third optional load module 153. For example, Figure 10 In the embodiment shown in Fig. 1, the two different gating control modules 14 are connected to the same position of the power signal line 11. Figure 11 In the embodiment shown in Fig. 2, the two different gating control modules 14 are connected to different positions of the power signal line 11.

[0081] In the embodiment shown in Fig. 1, the first optional load module 151 is connected to the power signal line 11 through the first gating control module 141. The second optional load module 152 and the third optional load module 153 are both connected to the power signal line 11 through the second gating control module 142. The first gating control module 141 and the second gating control module 142 are both connected to the current detection module 13.

[0082] Based on this, when the current detection module 13 detects that the first current loaded to the power signal line 11 is less than the set threshold, a target control signal is sent to the first gating control module 141 and the second gating control module 142. The first gating control module 141 is turned on based on the target control signal to connect the first optional load module 151 to the power signal line 11. The second gating control module 142 is turned on based on the target control signal to connect the second optional load module 152 and the third optional load module 153 to the power signal line 11.

[0083] In other embodiments, the number of the optional load modules 15 can also be 1, 2, 3 or more. The number of the gating control modules 14 can also be 1, 2, 3 or more. The connection between the gating control modules 14 and the optional load modules 15 can be one-to-one or one-to-many, which is not limited herein.

[0084] ​​The display panel provided in the embodiments of the present application has at least one gating control module and at least one optional load module, and each gating control module is connected to at least one optional load module. All gating control modules are connected to the current detection module. Thus, the gating control module and the optional load module can be centrally arranged or distributed, which improves the flexibility of module arrangement and is suitable for display panels with different structures.

[0085] In the above embodiments, when the number of gating control modules 14 is at least two, the controlled switch tubes in different gating control modules 14 can be located in the same functional film layer or different functional film layers, which is not limited herein.

[0086] Similarly, when the number of optional load modules 15 is at least two, the resistors in different optional load modules 15 can be located in the same functional film layer or different functional film layers, and the capacitors in different optional load modules 15 can be located in the same functional film layer or different functional film layers.

[0087] In some embodiments, all gating control modules 14 are synchronously turned on or turned off.

[0088] Specifically, when the number of gating control modules 14 is at least two, all gating control modules 14 are synchronously turned on or turned off under the control of the current detection module 13, so as to synchronously connect all optional load modules 15 to the power signal line 11 when the first current detected by the current detection module 13 is less than the set threshold, or not connect the optional load modules 15 to the power signal line 11 when the current detected by the current detection module 13 is equal to or greater than the set threshold, thereby achieving synchronous control of the connection of all optional load modules 15.

[0089] In some embodiments, when the number of gating control modules 14 is one, and the corresponding optional load modules 15 are connected to the gating control module 14, the connection between the gating control module 14 and all optional load modules 15 and the power signal line 11 is controlled.

[0090] In the above embodiments, the turn-on control signal for controlling the gating control module 14 to turn on can be a continuous turn-on signal or a segmented turn-on signal, which is not limited herein. For example, the continuous turn-on signal can be a continuous low-level signal or a continuous high-level signal, and the segmented turn-on signal can be a high-low level switching signal, which is not limited herein.

[0091] In some embodiments, the number of optional load modules 15 is at least two, and the optional load modules 15 are connected to the corresponding loop of the power signal line 11 at a preset interval.

[0092] Specifically, when the number of optional load modules 15 is one, the optional load module 15 can be arranged at any position on the loop corresponding to the power signal line 11; when the number of optional load modules 15 is two, the optional load modules can be connected on the loop corresponding to the power signal line 11 at a preset interval, equidistantly or unequidistantly, as long as they are arranged on the loop corresponding to the power signal line 11, which is not limited herein, so as to improve the flexibility of the arrangement.

[0093] In some embodiments, Figure 12 Another structure diagram of a display panel is provided in the embodiments of the present application. Referring to Figure 12 The optional load modules 15 are evenly dispersed on the loop corresponding to the power signal line 11.

[0094] Specifically, when the number of optional load modules 15 is at least two, the different optional load modules 15 are evenly dispersed on the loop corresponding to the power signal 11 at an equal interval, so as to avoid the concentration distribution of the capacitance and resistance in the optional load modules 15, and make the capacitance and resistance in the different optional load modules 15 evenly dispersed, thereby reducing the difficulty of the arrangement of the resistance and capacitance and facilitating the design and production.

[0095] Exemplarily, Figure 12 It is shown in the figure that the power signal line 11 is connected to the power management chip 12 at both ends; in other embodiments, the power signal line 11 can also be connected to the power management chip 12 at only one end, and in this case, the optional load modules 15 can be connected to the power signal line 11 at an equal interval to achieve the evenly dispersed arrangement.

[0096] In other embodiments, when the arrangement space is sufficient, the optional load modules 15 can be placed on the loop corresponding to the power signal line as long as they are placed on the loop, and their specific positions are not limited.

[0097] In some embodiments, Figure 13 Another structure diagram of a display panel is provided in the embodiments of the present application. Referring to Figure 13 The display panel 10 includes a display area AA and a non-display area DA located on at least one side of the display area AA; the non-display area DA is set as a fan-out area FO on one side of the display area AA; and Figure 13 Exemplarily, the non-display area DA on the lower side of the display area AA is set as the fan-out area FO.

[0098] The power signal line 11 is extended from the display area AA and passes through the fan-out area FO; the gating control module 14 and the optional load module 15 are arranged in the fan-out area FO, and the gating control module 14 is connected to the current detection module 13 through the wire 17.

[0099] Exemplarily, asFigure 13 As shown, the power signal line 11 is led out by the power management chip 12, and extends to the display area AA through the fan-out area FO; or the power signal line 11 extends to the display area AA through the fan-out area FO and the non-display area DA on the left and right sides.

[0100] Based on this, the gating control module 14 and the optional load module 15 can be arranged in the fan-out area FO, i.e., the gating control module 14 and the optional load module 15 are arranged in the fan-out area FO, and the gating control module 14 is connected to the current detection module 13 through the wire 17, so as to be controlled by the current detection module 13 to realize the control of turning on and turning off, and then realize the connection of the optional load module 15 to the power signal line 11 when the current detection module 13 detects that the first current is less than the set threshold.

[0101] At the same time, in this way, the influence on the layout of the lines in the display area AA can be avoided.

[0102] Exemplarily, as shown in the figure, Figure 13 In the display panel 10, the gating control module 14 and the optional load module 15 are arranged at only one site, so that the space of the fan-out area FO can be occupied less; in other embodiments, the gating control module 14 and the optional load module 15 can also be arranged at multiple different sites of the fan-out area FO to achieve better display water ripple improvement effect, which is not limited herein.

[0103] In the above embodiment, the power signal line can be a signal line for transmitting an OLED cathode signal, and in the fan-out area FO, the power signal line can be routed between the capacitor metal layer and the cathode metal layer. For this purpose, a conductor layer (such as an ITO layer) overlapping the metal layer in the original functional layer can be routed in the blank area to form a capacitor C together with the metal layer in the original functional layer in the display panel; the resistor R can be arranged as a thin wire in at least one wire layer; and the resistor R and the capacitor C are connected in parallel, and one end of the via is connected to the controlled switch tube, and the other end can be grounded.

[0104] In the above embodiment, the wire 17 is connected to the display driving circuit, and the connection between the wire 17 and the display driving circuit can be realized by routing an ITO line on the display panel to pull out a COP Bonding Pin (bonding pin).

[0105] In some embodiments, in combination with Figure 9 and the above description of Figure 9According to the description, the display panel 10 also includes a substrate 011 and a functional film layer stacked on one side of the substrate 011; at least some of the functional film layers used to form the conductive lines 17 and the functional film layers used to form the power signal lines 11 are disposed in the same layer; or, the functional film layer used to form the conductive lines 17 includes at least a transparent oxide conductive layer, and the functional film layer used to form the power signal lines 11 includes at least a metal conductive layer.

[0106] Specifically, the functional film layer forming the power signal line 11 can be at least one conductor layer in the display panel, such as at least one metal layer; the functional film layer for forming the wire 17 can also be at least one conductor layer in the display panel, such as at least one metal layer or a transparent oxide conductive layer (e.g., ITO layer); and the conductor layers corresponding to the power signal line 11 and the wire 17 can be the same, partially the same or completely different, and can be flexibly set according to the needs of the display panel, and are not limited here.

[0107] In some implementations... Figure 14 This is a schematic diagram of another display panel provided in an embodiment of this application. Figure 15 This is a schematic diagram of the structure of another display panel provided in an embodiment of this application. (Refer to...) Figure 14 and Figure 15 The display panel 10 also includes a display area AA and a peripheral circuit area located on at least one side of the display area AA; exemplarily, to Figure 14 or Figure 15 Taking the orientation shown as an example, the non-display areas DA located to the left and right of the display area AA are set as peripheral circuit areas.

[0108] The power signal lines 11 are distributed in the display area AA and the non-display area DA. At least a portion of the power signal lines 11 can extend from the display area AA to the non-display area DA and pass through the peripheral circuit area. The gating control module 14 and the optional load module 15 are located in the display area AA, and / or the gating control module 14 and the optional load module 15 are located in the peripheral circuit area. The gating control module 14 is connected to the current detection module 13 through the wire 17.

[0109] The power signal lines 11 are distributed within the display area AA and extend through the peripheral circuit area and / or fan-out area FO to connect to the power management chip 12. Thus, the power management chip 12 supplies power to the electrical components within the display area AA via the power signal lines 11. Specifically, the power management chip 12 outputs electrical signals, which are transmitted via the power signal lines 11 to the electrical components within the display area AA, such as the OLED, so that the OLED emits light using the electrical signals.

[0110] The display panel 10 provided by the embodiments of the present application can also be arranged in the peripheral circuit area and / or the display area AA, as long as the gate control module 14 and the optional load module 15 are connected to the corresponding loop of the power signal line 11, and the gate control module 14 is controlled to be turned on when the first current loaded on the power signal line 11 is less than the set threshold value, so that the optional load module 15 can be connected to the power signal line 11. In this way, the gate control module 14 and the optional load module 15 have high flexibility in arrangement, which is beneficial to be applied to display panels with different structures.

[0111] In other embodiments, the gate control module 14 and the optional load module 15 can be arranged in at least one of the fan-out area FO, the peripheral circuit area and the display area AA, which is not limited herein.

[0112] In some embodiments, in combination with the above description of the gate control module 14 and the optional load module 15, Figure 9 and the above description of the gate control module 14 and the optional load module 15, Figure 9 The display panel 10 further includes a substrate 011 and a functional film layer arranged on one side of the substrate 011. At least part of the functional film layer for forming the power signal line 11 is arranged in the same layer as the functional film layer for forming the conductor 17. Alternatively, the functional film layer for forming the conductor 17 includes at least a transparent oxide conductive layer, and the functional film layer for forming the power signal line 11 includes at least a metal conductive layer.

[0113] Specifically, the functional film layer for forming the power signal line 11 can be at least one conductor layer in the display panel, such as at least one metal layer. The functional film layer for forming the conductor 17 can also be at least one conductor layer in the display panel, such as at least one metal layer or a transparent oxide conductive layer (such as an ITO layer). The conductor layers corresponding to the power signal line 11 and the conductor 17 can be the same, partially the same or completely different, which can be flexibly arranged based on the requirements of the display panel, which is not limited herein.

[0114] In some embodiments, in combination with the above description of the gate control module 14 and the optional load module 15, Figure 16 Another structure diagram of a display panel provided by the embodiments of the present application is shown. Referring to Figure 16 The display panel 10 further includes a light emitting element 21 and a pixel driving circuit 22. The light emitting element 21 includes an anode and a cathode. The pixel driving circuit 22 is connected to the anode of the light emitting element 21. The power signal line 11 is connected to the cathode of the light emitting element 21. Exemplarily, the light emitting element can be an organic light emitting diode element.

[0115] The power signal line 11 is used to provide a low potential power signal, i.e. PVEE, to the cathode of the light emitting element 21.

[0116] Specifically, in the related art, when the power management chip 12 enters a low-frequency light load mode, i.e., the first current loaded on the power signal line 11 is less than a set threshold, the voltage on the low potential power signal line appears ripples, causing the brightness of the light emitting element to fluctuate, resulting in a display water ripple phenomenon. In view of this, in the embodiments of the present application, by connecting the gating control module 14 and the optional load module 15 on the low potential power signal line, when the current detection module 13 detects that the first current loaded on the power signal line is less than the set threshold, the gating control module 14 is controlled to be turned on, so that the optional load module 15 is connected to the power signal line, thereby avoiding entering the light load mode, to avoid the voltage fluctuation on the power signal line, and further to improve the display water ripple linearity.

[0117] On the basis of the above-mentioned embodiments, the embodiments of the present application further provide a display module, which comprises any one of the display panels provided in the above-mentioned embodiments, and can realize the corresponding beneficial effects.

[0118] Exemplarily, the display module can be applied to a display device such as a mobile phone or a tablet computer, and is not limited herein.

[0119] In some embodiments, Figure 17 a structural schematic diagram of a display module provided in the embodiments of the present application, Figure 18 a structural schematic diagram of another display module provided in the embodiments of the present application. Referring to Figure 17 and Figure 18 The display module 20 further comprises a flexible circuit board 23 and a rigid circuit board 24, the rigid circuit board 24 is electrically connected with the display panel 10 through the flexible circuit board 23; the power signal line 11 is connected to the rigid circuit board 24 via the flexible circuit board 23; the gating control module 14 and the optional load module 15 are arranged on the flexible circuit board 23; and / or, the gating control module 14 and the optional load module 15 are arranged on the rigid circuit board 24.

[0120] Exemplarily, referring to Figure 17 The power management chip 12 is arranged in the flexible circuit board 23, the power signal line 11 is connected with the power management chip 12 in the flexible circuit board 23, and is extended from the flexible circuit board 23 to the display panel 10, passes through the non-display area DA of the display panel 10, and is dispersed into the display area AA of the display panel 10, and finally is connected with the light emitting element 21 (as shown in Figure 17 or is connected with the light emitting element 21 (not shown in Figure 17 ) via the pixel driving circuit 22 in the display area AA.

[0121] Based on the structure, the gate control module 14 and the optional load module 15 are arranged in the loop corresponding to the power signal line, for example, on the flexible circuit board 23, or in the non-display area DA and / or the display area AA in the display panel 10, which can be flexibly arranged based on the requirements of the display module 20, and is not limited here.

[0122] In the display module 20 provided by the embodiment of the present application, the gate control module 14 and the optional load module 15 are arranged on the flexible circuit board 23, without the need to adjust the structure inside the display panel 10, without changing the wiring layout mode of the display panel 10, and with higher applicability to display panels 10 of different structures.

[0123] Exemplarily, referring to Figure 18 The power management chip 12 is arranged in the rigid circuit board 24, the power signal line 11 is connected with the power management chip 12 in the rigid circuit board 24, and is extended to the display panel 10 by the rigid circuit board 24 through the flexible circuit board 23, passes through the non-display area DA of the display panel 10, and is dispersed into the display area AA of the display panel 10, and is finally connected with the light emitting element 21, or is connected with the light emitting element 21 through the pixel driving circuit 22 in the display area AA.

[0124] Based on the structure, the gate control module 14 and the optional load module 15 are arranged in the loop corresponding to the power signal line, for example, on the flexible circuit board 23 and / or the rigid circuit board 24, or in the non-display area DA and / or the display area AA in the display panel 10, which can be flexibly arranged based on the requirements of the display module 20, and is not limited here.

[0125] In the display module 20 provided by the embodiment of the present application, the gate control module 14 and the optional load module 15 are arranged on the flexible circuit board 23 and / or the rigid circuit board 24, without the need to adjust the structure inside the display panel 10, without changing the wiring layout mode of the display panel 10, and with higher applicability to display panels 10 of different structures.

[0126] In the above embodiment, the flexible circuit board 23 can be a flexible printed circuit board (FPCB, which can be referred to as FPC), and the rigid circuit board 24 can be a rigid printed circuit board (PCB).

[0127] On the basis of the above-mentioned embodiments, the application further provides a driving method, which is applied to any one of the display panels provided by the above-mentioned embodiments to achieve the corresponding beneficial effects. Specifically, the current detection module can be used to detect the first current loaded on the power signal line, and when the first current is detected to be less than the set threshold, the gating control module is controlled to be turned on to connect the optional load module to the power signal line, thereby increasing the load and avoiding the power management chip from entering the PFM mode, and thus avoiding the display water ripples and improving the display effect.

[0128] In some embodiments, Figure 19 A flowchart of a driving method provided by the application is shown in FIG. 6. Referring to FIG. 6, Figure 19 The driving method can include the following steps:

[0129] S31, detecting the first current loaded on the power signal line based on the current detection module.

[0130] The current detection module detects the first current loaded on the power signal line and controls the subsequent control according to the detected first current.

[0131] S32, when the first current is less than the set threshold, controlling the gating control module to be turned on to connect the optional load module to the power signal line.

[0132] When the first current is less than the set threshold, the voltage on the power signal line can fluctuate; to avoid this fluctuation, the gating control module is controlled to be turned on to connect the optional load module to the power signal line, thereby avoiding the power management chip from entering the PFM mode, and thus avoiding the voltage fluctuation on the power signal line, improving the display water ripple phenomenon, and improving the display effect.

[0133] In some embodiments, when the first current is less than the set threshold in this step, the gating control module can be controlled to be turned on, specifically including:

[0134] When the first current is less than the set threshold, a first control signal is generated;

[0135] Based on the first control signal, the gating control module is controlled to be turned on.

[0136] The first control signal can be a turn-on control signal.

[0137] In the application, when the first current is less than the set threshold, a turn-on control signal is generated to control the gating control module to be turned on, and thus the optional load module is connected to the power signal line, which can increase the load on the power line, avoid the power management chip from entering the PFM mode due to light load, and thus improve the display water ripple and improve the display effect.

[0138] In some embodiments, the driving method further comprises:

[0139] controlling the gating control module to be turned off to disconnect the optional load module and the power signal line when the first current is equal to or greater than the set threshold.

[0140] In some embodiments, the display panel can normally display when the first current is equal to or greater than the set threshold. At this time, since no load adjustment is needed, the gating control module is controlled to be turned off to disconnect the optional load module and the power signal line, and the display panel can normally display.

[0141] In some embodiments, the step can specifically comprise:

[0142] generating a second control signal when the first current is equal to or greater than the set threshold;

[0143] controlling the gating control module to be turned off based on the second control signal.

[0144] In some embodiments, the second control signal can be a turn-off control signal.

[0145] In some embodiments, the display panel can normally display when the first current is equal to or greater than the set threshold. At this time, since no load adjustment is needed, the gating control module is controlled to be turned off to disconnect the optional load module and the power signal line, and the display panel can normally display.

[0146] In some embodiments, the gating control module is a controlled switch tube; the first control signal and the second control signal are one of a first level signal and a second level signal; the first level signal is higher than the second level signal; or the first level signal is lower than the second level signal.

[0147] In some embodiments, the first level signal and the second level signal are one of a high level signal (i.e., VGH) and a low level signal (VGL), and are different from each other. Correspondingly, the controlled switch tube is a switch tube that is turned on at a high level and turned off at a low level; or the controlled switch tube is a switch tube that is turned on at a low level and turned off at a high level, which is not limited herein and can be flexibly set based on the requirements of the display panel, the display module and the driving method.

[0148] It has to be noted that, in the present document, relational terms are intended only to convey a possible relationship between elements or items or between the operations and actions that are described, and these terms are not necessarily intended to convey that a literal relationship exists between these elements or items or between the operations and actions. Furthermore, the terms "comprise", "comprising", "include", "including", "contain", "containing", or any other similar terms are intended to be construed open-ended, i.e. to mean that the statement object includes, but is not limited to, the listed elements or objects, and does not exclude additional elements or objects. It is further intended that, when these terms are used, that they are used in the context to convey structural circumscription only or to convey possible structural circumscription, depending on the circumstances, and that these terms alone do not convey logical circumscription. It is to be understood that other embodiments can be utilized and structural or logical circumscription can be employed without departing from the scope of the present disclosure. Furthermore, to the extent that the terms "include", "including", "contain", "containing", "have", "having", "comprise", "comprising" or the like are used in the detailed description and / or in the claims, such terms are considered as including the words "by reference to" or "by reference to the method, process, article, or apparatus disclosed in" in describing the elements or features of the embodiments.

[0149] The foregoing is merely illustrative of the principles of the application and various modifications can be made by those skilled in the art without departing from the scope of the application. The above described embodiments are presented for purposes of clarity and explanation and should not be construed as limiting the scope of the application.

Claims

1. A display panel, the display panel comprising a power signal line and a power management chip, the power signal line receiving an electrical signal based on the power management chip; characterized in that, The display panel also includes: a current detection module, a gating control module, and an optional load module; The gating control module is connected between the selectable load module and the power signal line, and the selectable load module is controlled by the gating control module and connected to the power signal line. The current detection module is used to detect the first current applied to the power signal line, and when the first current is less than a set threshold, it controls the gating control module to turn on, so as to connect the optional load module to the power signal line, thereby increasing the load and preventing the power management chip from entering PFM mode.

2. The display panel according to claim 1, characterized in that, Also includes: Display driver circuit; The current detection module is located in the display driving circuit. The display driving circuit performs a self-test on the first current loaded onto the power signal line and controls the gating control module to turn on when the first current is less than the set threshold.

3. The display panel according to claim 1, characterized in that, The gating control module includes a controlled switching transistor; The control terminal of the controlled switch is connected to the control signal output by the current detection module, the first terminal of the controlled switch is connected to the power signal line, and the second terminal of the controlled switch is connected to the optional load module. The controlled switch is turned on under the control of the target control signal output by the current detection module to connect the optional load module and the power signal line.

4. The display panel according to claim 1, characterized in that, The optional load module includes a resistor; one end of the resistor is connected to the gating control module, and the other end of the resistor is connected to a fixed potential.

5. The display panel according to claim 4, characterized in that, The optional load module also includes a capacitor; the capacitor is connected in parallel with the resistor.

6. The display panel according to claim 4, characterized in that, It also includes a substrate and a functional film layer stacked on one side of the substrate; At least some of the functional film layers used to form the resistor and the functional film layers used to form the power signal lines are disposed in the same layer.

7. The display panel according to claim 5, characterized in that, It also includes a substrate and a functional film layer stacked on one side of the substrate; The capacitor includes a first electrode layer and a second electrode layer; The functional film layer for forming the resistor and the functional film layer for forming the first electrode layer are respectively disposed in the same layer as at least a portion of the functional film layer for forming the power signal line.

8. The display panel according to any one of claims 1-7, characterized in that, The number of the gating control module is at least one, and the number of the optional load module is at least one; One of the gating control modules is connected to at least one of the optional load modules; All of the aforementioned gating control modules are connected to the current detection module.

9. The display panel according to claim 8, characterized in that, All the aforementioned gating control modules are synchronously turned on or off.

10. The display panel according to claim 8, characterized in that, The number of optional load modules is at least two; The optional load modules are connected to the circuit corresponding to the power signal line at preset intervals.

11. The display panel according to claim 10, characterized in that, The optional load modules are evenly distributed on the circuits corresponding to the power signal lines.

12. The display panel according to any one of claims 1-7, characterized in that, It also includes a display area and a fan-out area located on one side of the display area, wherein the power signal line extends from the display area and passes through the fan-out area; The gating control module and the optional load module are located in the fan-out region, and the gating control module is connected to the current detection module via a wire.

13. The display panel according to claim 12, characterized in that, It also includes a substrate and a functional film layer stacked on one side of the substrate; At least a portion of the functional film layers used to form the conductors and the functional film layers used to form the power signal lines are disposed in the same layer. Alternatively, the functional film layer used to form the conductor may include at least a transparent oxide conductive layer, and the functional film layer used to form the power signal line may include at least a metal conductive layer.

14. The display panel according to any one of claims 1-7, characterized in that, It also includes a display area and a peripheral circuit area located on at least one side of the display area, wherein the power signal lines are distributed within the display area and extend through the peripheral circuit area; The gating control module and the optional load module are disposed within the display area, and / or the gating control module and the optional load module are disposed within the peripheral circuit area; The gating control module is connected to the current detection module via a wire.

15. The display panel according to claim 14, characterized in that, It also includes a substrate and a functional film layer stacked on one side of the substrate; At least a portion of the functional film layers used to form the conductors and the functional film layers used to form the power signal lines are disposed in the same layer. Alternatively, the functional film layer used to form the conductor may include at least a transparent oxide conductive layer, and the functional film layer used to form the power signal line may include at least a metal conductive layer.

16. The display panel according to any one of claims 1-7, characterized in that, It also includes light-emitting elements and pixel driving circuits; The light-emitting element includes an anode and a cathode, the pixel driving circuit is connected to the anode of the light-emitting element, and the power signal line is connected to the cathode of the light-emitting element.

17. A display module, characterized in that, Includes the display panel as described in any one of claims 1-16.

18. The display module according to claim 17, characterized in that, It also includes a flexible circuit board and a rigid circuit board, wherein the rigid circuit board is electrically connected to the display panel through the flexible circuit board; The power signal line is connected to the rigid circuit board via the flexible circuit board; The gating control module and the selectable load module are mounted on the flexible circuit board, and / or The gating control module and the optional load module are mounted on the rigid circuit board.

19. A driving method, characterized in that, Applied to the display panel according to any one of claims 1-16; the driving method includes: The current detection module detects the first current applied to the power signal line; When the first current is less than a set threshold, the gating control module is turned on to connect the optional load module to the power signal line.

20. The driving method according to claim 19, characterized in that, Also includes: When the first current is equal to or greater than a set threshold, the gating control module is controlled to shut down to disconnect the optional load module and the power signal line.

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