A driving circuit, driving method and display device of a display panel

Abstract

The present application discloses a driving circuit, a driving method and a display device for a display panel. The driving circuit includes: a first power input terminal, a second power input terminal, a gating circuit and a detection circuit; the gating circuit is connected to the first power input terminal, the second power input terminal and an external display panel. The first power input terminal and the second power input terminal are respectively used for connecting to a first voltage source and a second voltage source. The detection circuit is connected to the gating circuit and the display panel to trigger the gating circuit to conduct the first power input terminal or the second power input terminal and the display panel when the first current output to the display panel is greater than or less than a set threshold, so as to provide a working power supply for the display panel through the first voltage source or the second voltage source. By the above method, the driving circuit in the present application can automatically switch the working power supply output to the display panel, so that the display panel can have a more stable and better display effect.

Description

Technical Field

[0001] The present application relates to the technical field of display panels, and particularly to a driving circuit, a driving method and a display device for a display panel. Background Art

[0002] Currently, in the driving of a display screen, it is usually necessary to provide a VGH (transistor turn-on voltage) and an AVDD (source driver chip analog voltage) as the working power supplies of the display screen respectively. And in the conventional design, in order to avoid abnormal display when the display screen is powered on, generally the AVDD power supply timing needs to be earlier than that of VGH. Therefore, in the driving design of the display screen, usually the device power supply corresponds to an input DC 12V voltage source, and then the AVDD voltage is adjusted and generated, and then the VGH voltage is adjusted and generated through the AVDD.

[0003] However, with the development of display technology, the refresh rate of the display screen is getting higher and higher. When the refresh rate increases, especially when the refresh rate is 144Hz, 165Hz or 240Hz, the loads in the display screen corresponding to the two power supplies of AVDD and VGH will both become larger. Since the VGH is specifically generated by adjusting the AVDD, there is often a situation where the output capacity of the AVDD is insufficient. As a result, when the driving ability of the AVDD is relatively weak, the AVDD voltage will drop, and the drop of the AVDD voltage will cause the voltage output to the display screen to be inaccurate, thus bringing about abnormal display. Summary of the Invention

[0004] The main technical problem to be solved by the present application is to provide a driving circuit, a driving method and a display device for a display panel, which can solve the problem that the driving circuit of the display panel in the prior art cannot continuously output stable and accurate driving voltages, thus easily bringing about abnormal display.

[0005] To solve the above technical problem, a technical solution adopted by the present application is: to provide a driving circuit for a display panel, wherein the driving circuit includes: a first power input terminal for connecting to a first voltage source; a second power input terminal for connecting to a second voltage source; a gating circuit connected to the first power input terminal, the second power input terminal and an external display panel; a detection circuit connected to the gating circuit and the display panel, and the detection circuit detects a first current output to the display panel, so as to trigger the gating circuit to conduct the first power input terminal and the display panel when the first current is greater than a set threshold, so as to provide a working power supply for the display panel through the first voltage source, and trigger the gating circuit to conduct the second power input terminal and the display panel when the first current is less than the set threshold, so as to provide a working power supply for the display panel through the second voltage source.

[0006] Among them, the driving circuit further includes an adjustment circuit, which is connected between the first power input terminal and the second power input terminal. The adjustment circuit receives the first voltage source input corresponding to the first power input terminal, adjusts the first voltage source to obtain a second voltage source, and sends the second voltage source to the second power input terminal.

[0007] Among them, the driving circuit further includes a detection resistor, which is connected in series with the display panel and connected to the detection circuit. The detection circuit detects the second current flowing through the detection resistor to obtain a first current.

[0008] Among them, the gating circuit includes a first switching transistor and a second switching transistor. The first end of the first switching transistor is connected to the first power input terminal, the first end of the second switching transistor is connected to the second power input terminal, the second end of the first switching transistor is connected to the second end of the second switching transistor and the detection circuit, and the third end of the first switching transistor is connected to the third end of the second switching transistor and the display panel. When the detection circuit detects that the first current is greater than the set threshold, the first switching transistor is triggered to conduct, so as to conduct the first power input terminal and the display panel. When it is detected that the first current is less than the set threshold, the second switching transistor is triggered to conduct, so as to conduct the second power input terminal and the display panel.

[0009] Among them, the detection circuit includes a first resistor, a second resistor, and a comparator. One end of the first resistor is connected to the second power input terminal, the second end of the first resistor is connected to the first end of the second resistor and the negative terminal of the comparator, the second end of the second resistor is grounded, the common terminal of the comparator is connected to the second end of the first switching transistor and the second end of the second switching transistor, and the positive terminal of the comparator is connected to the detection resistor.

[0010] Among them, when the first voltage at the positive terminal of the comparator is greater than the second voltage at its negative terminal, the third voltage output by the common terminal of the comparator is at a high level to trigger the first switching transistor to conduct; when the first voltage at the positive terminal of the comparator is less than the second voltage at its negative terminal, the third voltage output by the common terminal of the comparator is at a low level to trigger the second switching transistor to conduct.

[0011] Among them, the detection circuit further includes an amplifier, a third resistor, a fourth resistor, and a fifth resistor. The common terminal of the amplifier is connected to the positive terminal of the comparator and the first end of the fifth resistor. The second end of the fifth resistor is connected to the negative terminal of the amplifier and the first end of the fourth resistor. The second end of the fourth resistor is connected to the second end of the detection resistor and the display panel. The positive terminal of the amplifier is connected to the first end of the third resistor. The second end of the third resistor is connected to the first end of the detection resistor, the third end of the first switching transistor, and the third end of the second switching transistor.

[0012] Among them, the driving circuit further includes an energy storage circuit and a power management circuit. The energy storage circuit is connected to the gating circuit and the power management circuit, and the power management circuit is connected to the display panel. The energy storage circuit receives the first voltage source or the second voltage source input corresponding to the gating circuit to perform energy storage regulation on the first voltage source or the second voltage source, and sends the first voltage source or the second voltage source after energy storage regulation to the power management circuit, and after being regulated again by the power management circuit, outputs it to the display panel.

[0013] To solve the above technical problems, another technical solution adopted by this application is: to provide a driving method for a display panel, which is a method for the driving circuit to drive the display panel. The driving circuit includes a first power input terminal, a second power input terminal, a gating circuit, and a detection circuit. The first power input terminal is used to connect to the first voltage source, the second power input terminal is used to connect to the second voltage source, the gating circuit is connected to the first power input terminal, the second power input terminal, and the display panel, and the detection circuit is connected to the gating circuit and the display panel. Among them, the driving method includes: detecting the first current output to the display panel; judging whether the first current is greater than a set threshold; if so, triggering the gating circuit to conduct the first power input terminal and the display panel to provide a working power supply for the display panel through the first voltage source; if not, triggering the gating circuit to conduct the second power input terminal and the display panel to provide a working power supply for the display panel through the second voltage source.

[0014] To solve the above technical problems, another technical solution adopted by this application is: to provide a display device, where the display device includes a display panel and the driving circuit described in any one of the above, and the driving circuit is electrically connected to the display panel to drive the light-emitting units of the display panel to emit light.

[0015] The beneficial effect of this application is: different from the prior art, the gating circuit in the driving circuit provided by this application is correspondingly connected to the first power input terminal, the second power input terminal, and the external display panel, and the first power input terminal and the second power input terminal are respectively used to connect to the first voltage source and the second voltage source, and the detection circuit is correspondingly connected to the gating circuit and the display panel. When it detects that the first current output to the display panel is greater than the set threshold, it triggers the gating circuit to conduct the first power input terminal and the display panel to provide a working power supply for the display panel through the first voltage source, and when the first current is less than the set threshold, it triggers the gating circuit to conduct the second power input terminal and the display panel to provide a working power supply for the display panel through the second voltage source, so as to be able to automatically switch the working power supply output to the display panel to avoid display abnormalities caused by inaccurate voltages output by the driving circuit when the load corresponding to the display panel increases, and also enables the display panel to have a more stable and better display effect. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, where:

[0017] Figure 1 is a schematic structural diagram of the first embodiment of the driving circuit of the present application;

[0018] Figure 2 is a schematic structural diagram of the second embodiment of the driving circuit of the present application;

[0019] Figure 3 is a schematic structural diagram of the third embodiment of the driving circuit of the present application;

[0020] Figure 4 is a schematic structural diagram of the fourth embodiment of the driving circuit of the present application;

[0021] Figure 5 is a schematic structural diagram of the fifth embodiment of the driving circuit of the present application;

[0022] Figure 6 is Figure 5 a schematic structural diagram of a specific embodiment of the detection circuit one in the driving circuit in;

[0023] Figure 7 is a schematic flowchart of an embodiment of the driving method of the display panel of the present application;

[0024] Figure 8 is a schematic structural diagram of an embodiment of the display device of the present application. Specific Embodiments

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0026] The terms "first", "second", and "third" in this application are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", and "third" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. All directional indications (such as up, down, left, right, front, back...) in the embodiments of this application are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture (as shown in the drawings). If this specific posture changes, then the directional indication also changes accordingly. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.

[0027] Referring to "embodiments" herein means that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appearing at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0028] The following describes this application in detail with reference to the drawings and embodiments.

[0029] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of the first embodiment of the driving circuit of this application. In this embodiment, the driving circuit 10 includes: a first power input terminal 11, a second power input terminal 12, a gating circuit 13, and a detection circuit 14.

[0030] It can be understood that the first power input terminal 11 and the second power input terminal 12 in the driving circuit 10 are respectively used to connect to the first voltage source and the second voltage source in the power supply system of the display panel 101 to obtain power through the first voltage source and the second voltage source and supply it to the driving circuit 10, so as to provide a working power supply for the load in the display panel 101 through the driving circuit 10, that is, to drive the light-emitting units of the display panel 101 to emit light by outputting a working power supply to the display panel 101.

[0031] Optionally, the first voltage source and the second voltage source may specifically be integrated in the driving circuit 10, or may be obtained from an external circuit. Alternatively, the first voltage source may be obtained from an external circuit, and the second voltage source may be obtained by regulating the voltage of the first voltage source. The present application does not limit this.

[0032] Further, the gating circuit 13 is correspondingly connected to the first power input terminal 11, the second power input terminal 12, and an external display panel 101, so as to be able to selectively conduct different conductive lines inside it, so as to electrically connect the first power input terminal 11 to the display panel 101, or electrically connect the second power input terminal 12 to the display panel 101. Thus, when the display panel 101 has different driving requirements and different loads, the first voltage source or the second voltage source can be automatically selected according to the current load characteristics to provide a working power supply for the display panel 101.

[0033] It can be understood that the load corresponding to the display panel 101 may specifically be any reasonable element or functional circuit in the display panel 101 that needs to obtain power to work, such as a light-emitting unit, a transistor, a source driver chip, etc. The present application does not limit this.

[0034] Specifically, the detection circuit 14 in the driving circuit 10 is correspondingly connected to the gating circuit 13 and the display panel 101, so as to be able to detect the first current output to the display panel 101 and compare the first current with a set threshold. When it is determined that the first current is greater than the set threshold, the gating circuit 13 is triggered to conduct the first power input terminal 11 and the display panel 101, so as to provide a working power supply for the display panel 101 through the first voltage source. When it is determined that the first current is less than the set threshold, the gating circuit 13 is triggered to conduct the second power input terminal 12 and the display panel 101, so as to provide a working power supply for the display panel 101 through the second voltage source.

[0035] It can be understood that the output voltages and driving capabilities corresponding to the first voltage source and the second voltage source are different. When the display panel 101 has different driving requirements, that is, when the first current output to the display panel 101 is different, the first voltage source or the second voltage source can be reasonably selected to provide a working power supply for the display panel 101, and the possible phenomenon of excessive voltage drop of the second voltage source caused by an overloaded load can be avoided.

[0036] In the above solution, by automatically switching the working power supply output to the display panel 101, the display abnormality caused by inaccurate voltage output by the driving circuit 10 when the load corresponding to the display panel 101 increases is avoided, so that the display panel 101 can have a more stable and better display effect.

[0037] Please refer to Figure 2 ,Figure 2 This is a schematic structural diagram of the second embodiment of the driving circuit of the present application. The difference between the driving circuit in this embodiment and the first embodiment of the driving circuit provided by the present application is that the driving circuit 20 further includes an adjustment circuit 25.

[0038] It can be understood that in one embodiment, the driving circuit 20 can specifically obtain a first voltage source 102 from an external circuit, and the second voltage source can also be obtained by adjusting the voltage of the first voltage source 102.

[0039] Specifically, the adjustment circuit 25 is correspondingly connected between the first power input terminal 21 and the second power input terminal 22. When the adjustment circuit 25 receives the first voltage source 102 input corresponding to the first power input terminal 21, it adjusts the first voltage source 102 to obtain a second voltage source and sends the second voltage source to the second power input terminal 22.

[0040] Optionally, the adjustment of the first voltage source 102 by the adjustment circuit 25 can specifically be to increase the output voltage of the first voltage source 102, or decrease its output voltage, or perform any reasonable electrical adjustment such as filtering adjustment, which is specifically determined by the actual circuit design requirements, and the present application does not limit this.

[0041] It can be understood that in this embodiment, the first power input terminal 21, the second power input terminal 22, the gating circuit 23, and the detection circuit 24 are the same as the first power input terminal 11, the second power input terminal 12, the gating circuit 13, and the detection circuit 14 respectively. For details, please refer to Figure 1 and the relevant text content, which will not be elaborated here.

[0042] Please refer to Figure 3 , Figure 3 This is a schematic structural diagram of the third embodiment of the driving circuit of the present application. The difference between the driving circuit in this embodiment and the first embodiment of the driving circuit provided by the present application is that the driving circuit 30 further includes a detection resistor 35.

[0043] It can be understood that to facilitate real-time detection of the load change in the display panel 101, a functional unit can be specifically set in the driving circuit 30 to obtain the load change situation by detecting this functional unit. For example, by detecting the current flowing through the detection resistor 35 integrated in the driving circuit 30, the corresponding load size of the display panel 101 can be determined.

[0044] Specifically, the detection resistor 35 is connected in series with the display panel 101, and specifically, it is connected in series with the load that the driving circuit 30 in the display panel 101 is intended to drive. That is, the currents flowing through the load and the detection resistor 35 actually correspond to the same current. When the detection circuit 34 is connected to the detection resistor 35, the second current flowing through the detection resistor 35 can be detected to obtain the first current, and then the first current is compared with the set threshold value.

[0045] Among them, the second current is specifically the same as the first current.

[0046] It can be understood that in this embodiment, the first power input terminal 31, the second power input terminal 32, the gating circuit 33, and the detection circuit 34 are the same as the first power input terminal 11, the second power input terminal 12, the gating circuit 13, and the detection circuit 14 respectively. For details, please refer to Figure 1 and the relevant text content, which will not be elaborated here.

[0047] Please refer to Figure 4 , Figure 4 is a schematic structural diagram of the fourth embodiment of the driving circuit of the present application. The difference between the driving circuit in this embodiment and the first embodiment of the driving circuit provided by the present application is that the driving circuit 40 further includes an energy storage circuit 45 and a power management circuit 46.

[0048] It can be understood that in the actual driving of the display panel 101, the display panel 101 usually requires different driving power supplies at different display times. In order to obtain a better driving power supply, before outputting the working power supply to the display panel 101, the working power supply usually needs to be managed and adjusted.

[0049] Specifically, the energy storage circuit 45 is correspondingly connected to the gating circuit 43 and the power management circuit 46, and the power management circuit 46 is further connected to the display panel 101. When the energy storage circuit 45 receives the first voltage source or the second voltage source input by the gating circuit 43, it can specifically perform energy storage regulation on the first voltage source or the second voltage source, that is, perform energy storage or release, and send the first voltage source or the second voltage source after energy storage regulation to the power management circuit 46. After the power management circuit 46 manages and adjusts the first voltage source or the second voltage source again, it is correspondingly output to the display panel 101 to ensure that the working power supply output to the display panel 101 can be adapted to the load currently corresponding to the display panel 101.

[0050] It can be understood that in this embodiment, the first power input terminal 41, the second power input terminal 42, the gating circuit 43, and the detection circuit 44 are the same as the first power input terminal 11, the second power input terminal 12, the gating circuit 43, and the detection circuit 14 respectively. For details, please refer to Figure 1And related text content will not be elaborated here.

[0051] Please refer to Figure 5 and Figure 6 , where Figure 5 is a schematic structural diagram of the fifth embodiment of the driving circuit of the present application, Figure 6 is Figure 5 a schematic structural diagram of a specific embodiment of the detection circuit in the driving circuit in

[0052] In one embodiment, the gating circuit 53 in the driving circuit 50 further includes a first switching transistor T1 and a second switching transistor T2. The first end of the first switching transistor T1 is correspondingly connected to the first power input terminal 51, the first end of the second switching transistor T2 is connected to the second power input terminal 52, the second end of the first switching transistor T1 is connected to the second end of the second switching transistor T2 and the detection circuit 54, and the third end of the first switching transistor T1 is connected to the third end of the second switching transistor T2 and the display panel 101.

[0053] Wherein, when the detection circuit 54 detects that the first current correspondingly output by the driving circuit 50 to the display panel 101 is greater than the set threshold, a first set voltage with a first voltage Vt level is correspondingly output to the second end of the first switching transistor T1 connected to the second end of the second switching transistor T2, so that the first switching transistor T1 is triggered to conduct under the action of the first set voltage, while the second switching transistor T2 remains off, to conduct the first power input terminal 51 and the display panel 101; and when the detection circuit 54 detects that the first current is less than the set threshold, a second set voltage with a second voltage Vr level is correspondingly output to the second end of the first switching transistor T1 connected to the second end of the second switching transistor T2, so that the second switching transistor T2 is triggered to conduct under the action of the second set voltage, while the first switching transistor T1 remains off, to conduct the second power input terminal 52 and the display panel 101.

[0054] Optionally, the display panel 101 correspondingly driven by the driving circuit 50 is specifically a liquid crystal display screen, the first voltage source is specifically a power supply of 12V DC, the first power input terminal 51 is VCC, the second power input terminal 52 is AVDD (source driver chip analog voltage), and the working power supply correspondingly output to the display panel 101 is VGH (transistor turn-on voltage).

[0055] In one embodiment, the driving circuit 50 further includes an adjustment circuit 55. The adjustment circuit 55 is correspondingly connected between the first power input terminal 51 and the second power input terminal 52, and when receiving the first voltage source VCC correspondingly input by the first power input terminal 51, the adjustment circuit 55 adjusts the first voltage source VCC to obtain a second voltage source AVDD and sends the second voltage source AVDD to the second power input terminal 52.

[0056] In one embodiment, the driving circuit 50 further includes a detection resistor 56, which is connected in series with the display panel 101, specifically in series with the load that the driving circuit 50 in the display panel 101 is intended to drive. That is, the currents flowing through the load and the detection resistor 56 actually correspond to the same current. When the detection circuit 54 is connected to the detection resistor 56, the second current flowing through the detection resistor 56 can be detected to obtain a first current, and then the first current is compared with a set threshold.

[0057] Further, in one embodiment, the detection circuit 54 further includes a first resistor R1, a second resistor R2, and a comparator BJ. One end of the first resistor R1 is connected to the second power input terminal 52, the second end of the first resistor R1 is connected to the first end of the second resistor R2 and the negative terminal of the comparator BJ, the second end of the second resistor R2 is grounded, the common terminal of the comparator BJ is connected to the second end of the first switching tube T1 and the second end of the second switching tube T2, and the positive terminal of the comparator BJ is correspondingly connected to the detection resistor 56.

[0058] It should be noted that the comparator BJ specifically refers to comparing two or more data items to determine whether they are equal, or determining the magnitude relationship and sorting order between them, which is called comparison. A circuit or device that can implement this comparison function is called a comparator BJ. The comparator BJ is a circuit that compares an analog voltage signal with a reference voltage. The two inputs of the comparator BJ are analog signals, and the output is a binary signal 0 or 1. When the difference between the input voltages increases or decreases and the positive and negative signs remain unchanged, its output remains constant.

[0059] Among them, when the first voltage Vt at the positive terminal of the comparator BJ is greater than the second voltage Vr at its negative terminal, the third voltage VL output at the common terminal of the comparator BJ is a high level, so as to correspondingly trigger the first switching tube T1 to conduct; when the first voltage Vt at the positive terminal of the comparator BJ is less than the second voltage Vr at its negative terminal, the third voltage VL output at the common terminal of the comparator BJ is a low level, so as to trigger the second switching tube T2 to conduct.

[0060] It should be noted that the set threshold compared with the first current is specifically obtained by comparing and calculating the voltage between the positive terminal and the negative terminal of the comparator BJ. When the first current is greater than the set threshold, it specifically corresponds to the first voltage Vt at the positive terminal of the comparator BJ being greater than the second voltage Vr at its negative terminal. When the first current is less than the set threshold, it corresponds to the first voltage Vt at the positive terminal of the comparator BJ being less than the second voltage Vr at its negative terminal, so as to further complete the selection of the first voltage source VCC and the second voltage source AVDD.

[0061] In one embodiment, the detection circuit 54 further includes an amplifier FD, a third resistor R3, a fourth resistor R4, and a fifth resistor R5. The common terminal of the amplifier FD is connected to the positive terminal of the comparator BJ and the first end of the fifth resistor R5. The second end of the fifth resistor R5 is connected to the negative terminal of the amplifier FD and the first end of the fourth resistor R4. The second end of the fourth resistor R4 is connected to the second end of the detection resistor 56 and the display panel 101. The positive terminal of the amplifier FD is connected to the first end of the third resistor R3. The second end of the third resistor R3 is connected to the first end of the detection resistor 56, the third end of the first switching transistor T1, and the third end of the second switching transistor T2.

[0062] It should be noted that the amplifier FD refers to a device that can amplify the voltage or power of an input signal and is composed of electron tubes or transistors, a power transformer, and other electrical components. It is used in various devices such as communication, broadcasting, radar, television, and automatic control.

[0063] It can be understood that at the position where the display panel 101 outputs the working power supply, in order to avoid excessive influence on the normal operation of the display panel 101, the detection resistor 56 connected in series therewith is specifically a high-precision resistor R0 with a small resistance value. For example, a resistor R0 with a resistance value of 0.1Ω and an accuracy of 0.5%, or 0.15Ω and an accuracy of 0.5%, etc., any reasonable resistance value and accuracy are acceptable, and the present application does not limit this.

[0064] When the detection resistor 56 corresponds to a high-precision resistor R0 with a small resistance value, in order to facilitate the comparator BJ in the detection circuit 54 to effectively perform corresponding voltage comparison, it is necessary to amplify the voltage across the detection resistor 56 through the setting of the amplifier FD and the corresponding resistors.

[0065] Specifically, when the load size corresponding to the display panel 101 changes, the second current passing through the detection resistor 56 in the driving circuit 50 also changes, and the voltage drop across the detection resistor 56 also changes, that is, the voltage across the two ends of the detection resistor 56 connected to the detection circuit 54 will change. After the voltage across the detection resistor 56 is amplified by an amplifier FD, a first voltage Vt at the positive terminal of the comparator BJ is obtained to be able to compare with a second voltage Vr at the negative terminal of the comparator BJ.

[0066] Among them, the second voltage Vr at the negative terminal of the comparator BJ is specifically a reference voltage obtained by resistor voltage division of the second voltage source AVDD.

[0067] It can be seen from this that when the load corresponding to the display panel 101 is large, the second current passing through the detection resistor 56 is also large, and the first voltage Vt will also be relatively large. When the first voltage Vt > the second voltage Vr, the comparator BJ will output a high-level third voltage VL, and the high-level third voltage VL will turn on the first switching transistor T1, so that the drive circuit 50 selects the first voltage source VCC to provide a working power supply for the display panel 101.

[0068] When the load corresponding to the display panel 101 is small, the second current passing through the detection resistor 56 is also small, and the first voltage Vt will also be relatively small. When the first voltage Vt < the second voltage Vr, the comparator BJ will output a low-level third voltage VL, and the low-level third voltage VL will turn on the second switching transistor T2, so that the drive circuit 50 selects the second voltage source AVDD to provide a working power supply for the display panel 101.

[0069] In an embodiment, the drive circuit 50 further includes an energy storage circuit 57 and a power management circuit 58, and the energy storage circuit 57 further includes a first capacitor C1 and an inductor L. The first end of the first capacitor C1 is connected to the selection circuit 53 and the first end of the inductor L, the second end of the first capacitor C1 is grounded, and the second end of the inductor L is connected to the power management circuit 58.

[0070] Further, in an embodiment, the power management circuit 58 further includes a third switching transistor T3, a diode D1, a second capacitor C2, a sixth resistor R6, a power management chip PMIC, and a seventh resistor R7. The first end of the third switching transistor T3 is connected to the second end of the inductor L and the first end of the diode D1. The second end of the diode D1 is connected to the first end of the second capacitor C2 and the first end of the display panel 101. The second end of the third switching transistor T3 is connected to the first end of the sixth resistor R6. The second end of the sixth resistor R6 is connected to the first end of the power management chip PMIC. The third end of the third switching transistor T3 is connected to the second end of the power management chip PMIC and the first end of the seventh resistor R7. The second end of the seventh resistor R7 is connected to the second end of the second capacitor C2 and the second end of the display panel 101 and is grounded.

[0071] In an embodiment, the drive circuit 50 further includes a power supply drive circuit 59, and the power supply drive circuit 59 is specifically connected to the second power input terminal 52, the first end of the second switching transistor T2, and the display panel 101 to provide a working power supply for another functional circuit of the display panel 101.

[0072] Please refer to Figure 7 , Figure 7 which is a schematic flowchart of an embodiment of the driving method of the display panel of the present application. Specifically, it may include the following steps:

[0073] S61: Detect the first current output to the display panel.

[0074] Understandably, the driving method in this embodiment is specifically a method of driving a display panel through a driving circuit to make its light-emitting units emit light and display. Among them, the driving circuit specifically includes a first power input terminal, a second power input terminal, a gating circuit, and a detection circuit. The first power input terminal is used to connect to a first voltage source, the second power input terminal is used to connect to a second voltage source, the gating circuit is connected to the first power input terminal, the second power input terminal, and the display panel, and the detection circuit is connected to the gating circuit and the display panel.

[0075] Specifically, the driving circuit specifically detects the first current output to the display panel through its detection circuit.

[0076] S62: Determine whether the first current is greater than a set threshold.

[0077] Further, compare the first current detected by the detection circuit with the set threshold to determine whether the first current is greater than the set threshold.

[0078] Among them, if the first current is greater than the set threshold, then execute S63; if the first current is less than the set threshold, then execute S64.

[0079] S63: Trigger the gating circuit to conduct the first power input terminal and the display panel to provide a working power supply for the display panel through the first voltage source.

[0080] Specifically, when the detection circuit detects that the first current output to the display panel is greater than the set threshold, trigger the gating circuit to conduct the first power input terminal and the display panel to provide a working power supply for the display panel through the first voltage source.

[0081] S64: Trigger the gating circuit to conduct the second power input terminal and the display panel to provide a working power supply for the display panel through the second voltage source.

[0082] Specifically, when the detection circuit detects that the first current output to the display panel is less than the set threshold, trigger the gating circuit to conduct the second power input terminal and the display panel to provide a working power supply for the display panel through the second voltage source.

[0083] Understandably, in another embodiment, the driving circuit may specifically further include one or more of a boost circuit, a detection resistor, an energy storage circuit, and a power management circuit, and may specifically be the driving circuit 10, driving circuit 20, driving circuit 30, driving circuit 40, or driving circuit 50 described in any one of the above embodiments. And the corresponding driving method for driving the display panel through the driving circuit may specifically further include any other reasonable steps. For details, please refer toFigures 1 - 6 and the related text content will not be elaborated here.

[0084] Please refer to Figure 8 , Figure 8 which is a schematic structural diagram of an embodiment of the display device of the present application. In this embodiment, the display device 70 includes a display panel 71 and a driving circuit 72, and the driving circuit 72 is specifically electrically connected to the display panel 71 to drive the light-emitting units of the display panel 71 to emit light.

[0085] It should be noted that the driving circuit 72 described in this embodiment is the driving circuit 10, driving circuit 20, driving circuit 30, driving circuit 40 or driving circuit 50 described in any one of the above embodiments. For details, please refer to Figures 1 - 6 and the related text content, which will not be elaborated here.

[0086] The beneficial effect of the present application is that, different from the prior art, the gating circuit in the driving circuit provided by the present application is correspondingly connected to the first power input terminal, the second power input terminal and the external display panel, and the first power input terminal and the second power input terminal are respectively used to connect to the first voltage source and the second voltage source, and the detection circuit is correspondingly connected to the gating circuit and the display panel. When it detects that the first current output to the display panel is greater than the set threshold, it triggers the gating circuit to conduct the first power input terminal and the display panel, so as to provide the working power for the display panel through the first voltage source, and when the first current is less than the set threshold, it triggers the gating circuit to conduct the second power input terminal and the display panel, so as to provide the working power for the display panel through the second voltage source, thereby being able to automatically switch the working power output to the display panel, so as to avoid display anomalies caused by inaccurate voltage output by the driving circuit when the load corresponding to the display panel increases, and also enabling the display panel to have a more stable and better display effect.

[0087] The above is only the embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A driving circuit for a display panel, characterized in that, The driving circuit includes: A first power input terminal for connecting to a first voltage source; A second power input terminal for connecting to a second voltage source; A gating circuit connected to the first power input terminal, the second power input terminal, and the external display panel; A detection circuit connected to the gating circuit and the display panel. The detection circuit detects a first current output to the display panel, and when the first current is greater than a set threshold, triggers the gating circuit to conduct the first power input terminal and the display panel, so as to provide a working power supply for the display panel through the first voltage source, and when the first current is less than the set threshold, triggers the gating circuit to conduct the second power input terminal and the display panel, so as to provide a working power supply for the display panel through the second voltage source; An energy storage circuit and a power management circuit. The energy storage circuit is connected to the gating circuit and the power management circuit, and the power management circuit is connected to the display panel. The energy storage circuit receives the first voltage source or the second voltage source input corresponding to the gating circuit to store and regulate the first voltage source or the second voltage source, and sends the first voltage source or the second voltage source after energy storage regulation to the power management circuit, so as to output to the display panel after being regulated again by the power management circuit.

2. The driving circuit according to claim 1, wherein The driving circuit further includes an adjustment circuit connected between the first power input terminal and the second power input terminal. The adjustment circuit receives the first voltage source input corresponding to the first power input terminal to adjust the first voltage source to obtain the second voltage source, and sends the second voltage source to the second power input terminal.

3. The driving circuit according to claim 1, wherein The driving circuit further includes a detection resistor connected in series with the display panel and connected to the detection circuit. The detection circuit detects a second current flowing through the detection resistor to obtain the first current.

4. The driving circuit according to claim 3, wherein The gating circuit includes a first switching tube and a second switching tube. A first end of the first switching tube is connected to the first power input terminal, a first end of the second switching tube is connected to the second power input terminal, a second end of the first switching tube is connected to a second end of the second switching tube and the detection circuit, and a third end of the first switching tube is connected to a third end of the second switching tube and the display panel. When the detection circuit detects that the first current is greater than a set threshold, it triggers the first switching tube to conduct, so as to conduct the first power input terminal and the display panel, and when it detects that the first current is less than the set threshold, it triggers the second switching tube to conduct, so as to conduct the second power input terminal and the display panel.

5. The driving circuit according to claim 4, wherein The detection circuit includes a first resistor, a second resistor, and a comparator. One end of the first resistor is connected to the second power input terminal. The second end of the first resistor is connected to the first end of the second resistor and the negative input terminal of the comparator. The second end of the second resistor is grounded. The common terminal of the comparator is connected to the second end of the first switching transistor and the second end of the second switching transistor. The positive input terminal of the comparator is connected to the detection resistor.

6. The driving circuit according to claim 5, wherein when a first voltage at the positive input terminal of the comparator is greater than a second voltage at its negative input terminal, a third voltage output from the common terminal of the comparator is at a high level to trigger the first switching transistor to conduct; when the first voltage at the positive input terminal of the comparator is less than the second voltage at its negative input terminal, the third voltage output from the common terminal of the comparator is at a low level to trigger the second switching transistor to conduct.

7. The driving circuit according to claim 5, wherein the detection circuit further includes an amplifier, a third resistor, a fourth resistor, and a fifth resistor. The common terminal of the amplifier is connected to the positive input terminal of the comparator and the first end of the fifth resistor. The second end of the fifth resistor is connected to the negative input terminal of the amplifier and the first end of the fourth resistor. The second end of the fourth resistor is connected to the second end of the detection resistor and the display panel. The positive input terminal of the amplifier is connected to the first end of the third resistor. The second end of the third resistor is connected to the first end of the detection resistor, the third end of the first switching transistor, and the third end of the second switching transistor.

8. A driving method for a display panel, wherein the driving method is a method for driving the display panel by the driving circuit described in any one of claims 1-7, characterized in that, The driving method includes: detecting a first current output to the display panel; judging whether the first current is greater than a set threshold; if so, triggering the gating circuit to conduct the first power input terminal and the display panel to provide a working power supply for the display panel through the first voltage source; if not, triggering the gating circuit to conduct the second power input terminal and the display panel to provide a working power supply for the display panel through the second voltage source.

9. A display device, characterized in that, The display device includes a display panel and the driving circuit according to any one of claims 1-7. The driving circuit is electrically connected to the display panel to drive the light-emitting units of the display panel to emit light.

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