Display panel, external compensation method of power voltage thereof and display device

Abstract

The display panel, the external compensation method of the power supply voltage of the display panel and the display device are provided, the display panel comprises a plurality of display modules and a control module, each display module comprises a power supply module, a driving module, an editable resistor and a current detection module, the power supply module, the editable resistor, the current detection module and the driving module are connected in series; the control module is connected with the editable resistor and the current detection module in each display module; the control module is configured to output resistance adjustment signals of each editable resistor according to current signals obtained by each current detection module, and adjust the resistance of the corresponding editable resistor according to the resistance adjustment signals, so that the driving module of each display module receives the same voltage output by the power supply module. The display panel provided by the present disclosure can externally compensate the power supply voltage output by the power supply module of the plurality of independently powered display modules, and reduce the difference between the power supply voltages of each display module.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and more specifically, to a display panel, an external compensation method for the power supply voltage of the display panel, and a display device. Background Technology

[0002] MiniLED is a type of LED technology with relatively small LED chip size, representing a further refinement of small-pitch LEDs. Compared to ordinary LEDs, MiniLEDs offer higher resolution, contrast, and color gamut, and are also thinner, lighter, and more energy-efficient, thus gaining increasing popularity.

[0003] Currently, MiniLED is composed of multiple display modules spliced ​​together. The driving units of all pixels in a single display module are connected together for power supply. Multiple display modules are powered separately, and different display modules are output by different power supply modules. Therefore, the voltage of the power supply module directly affects the brightness of the display module.

[0004] Because different display modules use different power supply modules for output, differences in the output of the drive units are inevitable, resulting in significant differences in brightness between display modules.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this disclosure is to provide a display panel that can externally compensate the power supply voltage output by the power modules of multiple independently powered display modules, thereby reducing the difference in power supply voltage among the display modules.

[0007] According to one aspect of the present disclosure, a display panel is provided, the display panel including:

[0008] Multiple display modules are provided, each of which includes a power module, a drive module, an editable resistor, and a current detection module, wherein the power module, the editable resistor, the current detection module, and the drive module are connected in series.

[0009] A control module is provided, which is connected to the editable resistors and the current detection modules in each of the display modules respectively. The control module is configured to output a resistance adjustment signal for each editable resistor based on the current signal obtained by each of the current detection modules, and adjust the resistance of the corresponding editable resistor according to the resistance adjustment signal, so that the voltage output by the power module received by the drive module of each of the display modules is the same.

[0010] In one exemplary embodiment of this disclosure, the power module includes a DC-DC converter, and the DC-DC converter, the programmable resistor, the current detection module, and the drive module are connected in series.

[0011] In one exemplary embodiment of this disclosure, the control module includes an analog-to-digital conversion module and a processing module. The current detection module sends the detected current signal to the analog-to-digital conversion module, which converts the current signal into current data and sends it to the processing module. The processing module is configured to output the resistance signal required by the editable resistor based on the current data and send the resistance signal to the editable resistor to achieve resistance adjustment.

[0012] In one exemplary embodiment of this disclosure, the external voltage IR of the display module is at its maximum when the display module is in the maximum brightness mode, and the external voltage of the display module is IR when in the maximum brightness mode. max The external voltage IR of the display module is equal to I(R trace + R resistor). When the external voltage of the display module is IR... max The resistance R of the editable resistor is equal to IR. max / IR trace; where I is the current and R is the trace resistance.

[0013] In one exemplary embodiment of this disclosure, the current detection module is configured to acquire the current signal of the corresponding display module in real time.

[0014] According to another aspect of the present disclosure, an external compensation method for the power supply voltage of a display panel is provided, the display panel including a plurality of independently powered display modules, the external compensation method including:

[0015] An editable resistor and a current detection module are provided between the power module and the drive module of each of the display modules, and the power module, the editable resistor, the current detection module and the drive module are connected in series in sequence.

[0016] A control module is provided, and the control module is connected to the programmable resistor and the current detection module in each of the display modules respectively;

[0017] The current signal of the corresponding display module is obtained through each of the current detection modules;

[0018] The control module acquires the current signals acquired by each of the current detection modules, and outputs multiple resistance adjustment signals according to the one-to-one correspondence of the current signals, and sends the multiple resistance adjustment signals to the multiple programmable resistors one-to-one correspondence.

[0019] The programmable resistor adjusts its resistance according to the resistance adjustment signal so that the voltage output by the power module received by the driving module of each display module is the same.

[0020] In one exemplary embodiment of this disclosure, acquiring the current signal of the corresponding display module through each of the current detection modules includes:

[0021] Set each of the aforementioned display modules to its maximum brightness setting;

[0022] When the display module is at its maximum brightness, the current signal of the corresponding display module is obtained through each of the current detection modules.

[0023] In one exemplary embodiment of this disclosure, before each of the display modules performs its initial display, the voltage output by the power supply module received by the drive module is compensated once by the current detection module, the editable resistor, and the control module.

[0024] In one exemplary embodiment of this disclosure, a preset number of frames is used as a preset period. In each preset period, the voltage output by the power module received by the drive module is compensated once through the current detection module, the editable resistor, and the control module.

[0025] According to another aspect of the present disclosure, a display device is provided, the display device including the display panel described above.

[0026] The display panel disclosed herein includes multiple display modules, which are spliced ​​together to form the display panel. Each display module is independently powered and includes a power module, a drive module, an editable resistor, and a current detection module. The power module, editable resistor, current detection module, and drive module are connected in series. The control module can output a resistance adjustment signal for each editable resistor based on the current signal obtained by each current detection module, and adjust the resistance of the corresponding editable resistor according to the resistance adjustment signal. This ensures that the voltage output by the power module received by the drive module of each display module is the same, thereby guaranteeing that each display module receives the same power supply voltage. This achieves external compensation for the power supply voltage of each display module, reduces the difference in display brightness between the display modules, and improves the display effect of the display panel.

[0027] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0029] Figure 1 A schematic diagram of a display panel provided according to an embodiment of this disclosure;

[0030] Figure 2 A schematic diagram of a display module provided in one embodiment of this disclosure;

[0031] Figure 3 A schematic diagram of a pixel circuit provided for one embodiment of this disclosure;

[0032] Figure 4 A brightness variation curve is provided for one embodiment of this disclosure;

[0033] Figure 5 A color dot change curve is provided for one embodiment of this disclosure;

[0034] Figure 6 This is a schematic diagram of the module composition of a display module provided in this disclosure;

[0035] Figure 7 This is a circuit compensation diagram for a display module provided in this disclosure;

[0036] Figure 8 This is a schematic diagram of circuit compensation for a display panel provided in this disclosure;

[0037] Figure 9 A flowchart of an external compensation method for the power supply voltage of a display panel provided in this disclosure.

[0038] Explanation of reference numerals in the attached figures:

[0039] 10. Display panel;

[0040] 100. Display module; 110. Power supply module; 120. Programmable resistor; 130. Current detection module; 140. Driver module; 150. Control module; 151. Processing module; 152. Analog-to-digital converter module;

[0041] 200. Pixel circuit. Detailed Implementation

[0042] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the invention will be more thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art.

[0043] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of the invention. However, those skilled in the art will recognize that the technical solutions of the invention can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of the invention.

[0044] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0045] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0046] Currently, such as Figure 1 As shown, MiniLED is composed of multiple display modules 100 spliced ​​together; as Figure 2 As shown, all pixel driving units VDD (power supply voltage) in the pixel circuit 200 of a single display module 100 are connected together in a mesh for power supply, while each display module 100 is powered independently. Figure 3 As shown, according to the TFT structure, when the LED is lit, VDD is directly connected to the source of the TFT M3 that controls the current. Therefore, the VDD voltage directly affects the TFT output current.

[0047] like Figure 4 and Figure 5 As shown, the VDD external voltage (IR) of each display module 100 varies under different load conditions, which has a significant impact on brightness. At the same time, since different display modules 100 use different DC-DC converters for output, differences in TFT output are inevitable, resulting in significant differences in brightness between the display modules 100.

[0048] To address the aforementioned technical problems, embodiments of this disclosure provide a display panel, such as... Figures 6-8 As shown, the display panel 10 includes multiple display modules 100 and a control module 150. Each display module 100 includes a power module 110, a drive module 140, an editable resistor 120, and a current detection module 130. The power module 110, the editable resistor 120, the current detection module 130, and the drive module 140 are connected in series. The control module 150 is connected to the editable resistor 120 and the current detection module 130 in each display module 100, respectively. The control module 150 is configured to output a resistance adjustment signal for each editable resistor 120 based on the current signal obtained by each current detection module 130, and adjust the resistance of the corresponding editable resistor 120 according to the resistance adjustment signal, so that the voltage output by the power module 110 received by the drive module 140 of each display module 100 is the same.

[0049] The display panel 10 provided in this disclosure includes multiple display modules 100, which are spliced ​​together to form the display panel 10. Each display module 100 is independently powered. Each display module 100 includes a power module 110, a drive module 140, an editable resistor 120, and a current detection module 130. The power module 110, the editable resistor 120, the current detection module 130, and the drive module 140 are connected in series. The control module 150 can output a resistance adjustment signal for each editable resistor 120 according to the current signal obtained by each current detection module 130, and adjust the resistance of the corresponding editable resistor 120 according to the resistance adjustment signal, so that the voltage output by the power module 110 received by the drive module 140 of each display module 100 is the same, thereby ensuring that the power supply voltage received by each display module 100 is the same, realizing external compensation for the power supply voltage of each display module 100, reducing the display brightness difference between each display module 100, and improving the display effect of the display panel 10.

[0050] In one embodiment of this disclosure, the power module 110 includes a DC-DC converter, an editable resistor 120, a current detection module 130, and a drive module 140 connected in series. The DC-DC converter converts the power signal into a DC power signal. The timing control module 150 (TCON) transmits a candidate signal to the voltage conversion (L / S) module based on the received image to be displayed. The DC-DC converter transmits a DC power signal of a certain potential to the voltage conversion module based on the received input power signal. The voltage conversion module converts the candidate signal into a drive signal based on the DC power signal and transmits it to the gate drive module. The gate drive module then inputs drive signals to each display unit.

[0051] The functions of each module can be implemented through corresponding circuits, such as DC-DC converter circuits, voltage conversion circuits, and gate drive circuits.

[0052] In one embodiment of this disclosure, such as Figure 7 As shown, the control module 150 includes an analog-to-digital converter module 152 and a processing module 151. The current detection module 130 sends the detected current signal to the analog-to-digital converter module 152. The analog-to-digital converter module 152 converts the current signal into current data and sends it to the processing module 151. The processing module 151 is configured to output the resistance signal required by the editable resistor according to the current data and send the resistance signal to the editable resistor to realize resistance adjustment.

[0053] In one embodiment of this disclosure, the editable resistor 120 may be formed by connecting multiple small resistors in series. For example, when the editable resistor 120 needs to be at zero resistance, inputting a corresponding command will short-circuit all resistors, making the potentiometer resistance zero; for example, when the editable resistor 120 needs to be at half its maximum resistance, inputting a corresponding command will make the resistance connected in the circuit half of the total resistance; for example, when the editable resistor 120 needs to be at its maximum resistance, inputting a corresponding command will connect all resistors in the circuit, thereby achieving resistance adjustment through control commands. Of course, those skilled in the art can also use other types of editable resistors 120, and any editable resistor 120 that can achieve the same technical effect falls within the protection scope of this disclosure.

[0054] In one embodiment of this disclosure, the current detection module 130 is a module for measuring current, which can convert the current signal into a digital signal for processing and analysis. The current acquisition module is based on the law of electromagnetic induction, that is, when current passes through a conductor, a magnetic field is generated, and the strength of the magnetic field is proportional to the magnitude of the current; that is, by measuring the strength of the magnetic field, the magnitude of the current can be determined. The sensor of the current acquisition module is the part used to measure the current, and it typically uses the Hall effect or magnetoresistive effect to measure the strength of the magnetic field; the analog-to-digital converter (ADC) 152 of the control module 150 is the part used to convert the signal measured by the sensor into a digital signal.

[0055] In the current detection module 130, the sensor is typically a toroidal magnetic core with a wire wrapped around it. When current flows through the wire, a magnetic field is generated around the magnetic core, the strength of which is proportional to the magnitude of the current. The sensor usually incorporates a Hall element or a magnetoresistive element to measure the magnetic field strength. When current flows through the wire, the magnetic field strength changes, and the Hall element or magnetoresistive element generates a voltage signal, which is proportional to the magnitude of the current. Of course, those skilled in the art can use other types of current detection modules 130; any current detection module 130 that achieves the same technical effect falls within the scope of this disclosure.

[0056] Specifically, the external voltage IR of the display module 100 is at its maximum when the display module 100 is in the maximum brightness mode; when the display module 100 is in the maximum brightness mode, the external voltage IR is [value missing]. max The external voltage IR of the display module 100 is equal to I(R trace + R resistor). When the external voltage of the display module 100 is IR... max The editable resistor R is 120Ω, and its resistance is equal to IR. max / IR trace; where I is the current and R is the trace resistance.

[0057] Specifically, the current detection module 130 is configured to acquire the current signal of the corresponding display module 100 in real time. By acquiring the current signal of the corresponding display module 100 in real time through the current detection module 130, the power supply voltage of each display module 100 can be compensated once each time the display screen is refreshed; of course, compensation can also be performed only once before the first display and not again during subsequent refreshes; or, compensation can be performed once according to a preset refresh cycle, and this disclosure does not limit this.

[0058] Embodiments of this disclosure also provide an external compensation method for the power supply voltage of a display panel, the display panel including multiple independently powered display modules, such as... Figure 9 As shown, the external compensation methods include:

[0059] Step S100: Set an editable resistor and a current detection module between the power supply module and the drive module of each display module, and connect the power supply module, the editable resistor, the current detection module and the drive module in series in sequence.

[0060] Step S200: Provide a control module and connect the control module to the editable resistor and current detection module in each display module respectively;

[0061] Step S300: Obtain the current signal of the corresponding display module through each current detection module;

[0062] Step S400: The control module acquires the current signals acquired by each current detection module, and outputs multiple resistance adjustment signals according to the one-to-one correspondence of the current signals, and sends the multiple resistance adjustment signals to multiple programmable resistors one-to-one correspondence.

[0063] Step S500: The editable resistor adjusts the resistance according to the resistance adjustment signal so that the voltage output by the power supply module is the same for the drive modules of each display module.

[0064] The external compensation method for the power supply voltage of the display panel disclosed herein includes a display panel comprising multiple display modules, which are spliced ​​together to form the display panel. Each display module is independently powered and includes a power supply module, a drive module, an editable resistor, and a current detection module. The power supply module, the editable resistor, the current detection module, and the drive module are connected in series. A control module outputs a resistance adjustment signal for each editable resistor based on the current signal obtained by each current detection module, and adjusts the resistance of the corresponding editable resistor according to the resistance adjustment signal. This ensures that the voltage output by the power supply module received by the drive module of each display module is the same, thereby guaranteeing that each display module receives the same power supply voltage. This achieves external compensation for the power supply voltage of each display module, reduces the difference in display brightness between the display modules, and improves the display effect of the display panel.

[0065] The steps of the external compensation method for the power supply voltage of the display panel provided in this disclosure will be described in detail below.

[0066] In step S100, an editable resistor and a current detection module are set between the power supply module and the drive module included in each display module, and the power supply module, the editable resistor, the current detection module and the drive module are connected in series in sequence.

[0067] Specifically, such as Figure 6 As shown, the power module 110 includes a DC-DC converter, an editable resistor 120, a current detection module 130, and a drive module 140 connected in series. The DC-DC converter converts the power signal into a DC power signal. The timing control module 150 (TCON) transmits a candidate signal to the voltage conversion (L / S) module based on the received image to be displayed. The DC-DC converter transmits a DC power signal of a certain potential to the voltage conversion module based on the received input power signal. The voltage conversion module converts the candidate signal into a drive signal based on the DC power signal and transmits it to the gate drive module. The gate drive module then inputs drive signals to each display unit.

[0068] The functions of each module can be implemented through corresponding circuits, such as DC-DC converter circuits, voltage conversion circuits, and gate drive circuits.

[0069] In step S200, a control module is provided, and the control module is connected to the editable resistor and current detection module in each display module respectively.

[0070] Specifically, such as Figure 7 As shown, the control module 150 includes an analog-to-digital converter module 152 and a processing module 151. The current detection module 130 sends the detected current signal to the analog-to-digital converter module 152. The analog-to-digital converter module 152 converts the current signal into current data and sends it to the processing module 151. The processing module 151 is configured to output the resistance signal required by the editable resistor according to the current data and send the resistance signal to the editable resistor to realize resistance adjustment.

[0071] In step S300, the current signal of the corresponding display module is obtained through each current detection module.

[0072] Specifically, such as Figure 7 As shown, the current detection module 130 is configured to acquire the current signal of the corresponding display module 100 in real time. By acquiring the current signal of the corresponding display module 100 in real time through the current detection module 130, the power supply voltage of each display module 100 can be compensated once every time the display screen is refreshed.

[0073] When the current detection module 130 obtains the current signal of the corresponding display module 100, each display module 100 can be set to the maximum brightness screen. When the display module 100 is set to the maximum brightness screen, the current detection module 130 obtains the current signal of the corresponding display module 100. Alternatively, each display module 100 can be set to the theoretically same brightness screen, and then the current detection module 130 obtains the current signal of the corresponding display module 100.

[0074] In step S400, the control module acquires the current signals acquired by each current detection module, outputs multiple resistance adjustment signals according to the one-to-one correspondence of the current signals, and sends the multiple resistance adjustment signals to multiple programmable resistors one-to-one correspondence.

[0075] Specifically, such as Figure 8 As shown, the processing module 151 obtains the current signals obtained by each current detection module 130 through the analog-to-digital conversion module 152, and outputs multiple resistance adjustment signals according to the one-to-one correspondence of the current signals, and sends the multiple resistance adjustment signals to multiple programmable resistors 120 one-to-one correspondence.

[0076] Specifically, the external voltage IR of the display module 100 is at its maximum when the display module 100 is in the maximum brightness mode, and the external voltage of the display module 100 in the maximum brightness mode is IR. maxThe external voltage IR of the display module 100 is equal to I(R trace + R resistor). When the external voltage of the display module 100 is IR... max The editable resistor R is 120Ω, and its resistance is equal to IR. max / IR trace; where I is the current and R is the trace resistance.

[0077] Specifically, the current detection module 130 is configured to acquire the current signal of the corresponding display module 100 in real time. By acquiring the current signal of the corresponding display module 100 in real time through the current detection module 130, the power supply voltage of each display module 100 can be compensated once every time the display screen is refreshed. Of course, it is also possible to compensate the voltage output by the power module 110 received by the drive module 140 through the current detection module 130, the editable resistor 120 and the control module 150 only before each display module 100 performs its initial display. Alternatively, with a preset frame number as the preset period, the voltage output by the power module 110 received by the drive module 140 can be compensated once in each preset period through the current detection module 130, the editable resistor 120 and the control module 150. This disclosure does not limit this.

[0078] In step S500, the editable resistor adjusts its resistance according to the resistance adjustment signal so that the voltage output by the power supply module is the same for the drive modules of each display module.

[0079] Specifically, such as Figure 8 As shown, after each editable resistor 120 receives the resistance adjustment signal output by the processing module 151, it adjusts the resistance to ensure that the voltage output by the power module 110 received by the drive module 140 of each display module 100 is the same. This ensures that each display module 100 receives the same power supply voltage, realizes external compensation for the power supply voltage of each display module 100, reduces the difference in display brightness between each display module 100, and improves the display effect of the display panel 10.

[0080] Embodiments of this disclosure also provide a display device, which includes the display panel 10 provided in the above embodiments. The display device may be, for example, a mobile phone, tablet computer, advertising screen, vehicle display screen, or other device with display functions; these are not listed individually herein. The display device provided in this disclosure includes a display panel 10 comprising multiple display modules 100, which are spliced ​​together to form the display panel 10. Each display module 100 is independently powered and includes a power module 110, a drive module 140, an editable resistor 120, and a current detection module 130. The power module 110, the editable resistor 120, the current detection module 130, and the drive module 140 are connected in series. The control module 150 can output a resistance adjustment signal for each editable resistor 120 based on the current signal obtained by each current detection module 130, and adjust the resistance of the corresponding editable resistor 120 according to the resistance adjustment signal, so that the voltage received by the drive module 140 of each display module 100 from the power module 110 is the same, thereby ensuring that each display module 100 receives the same power supply voltage. This achieves external compensation for the power supply voltage of each display module 100, reduces the difference in display brightness between each display module 100, improves the display effect of the display panel 10, and thus improves the display effect of the display device. For further details on the other beneficial effects of the display device, please refer to the above discussion of the embodiment of display panel 10, which will not be repeated here.

[0081] It should be noted that the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, may be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0082] The units described in the embodiments of the present invention can be implemented in software or hardware, and the described units can also be located in a processor. The names of these units do not necessarily limit the specific unit itself.

[0083] It should be noted that although several modules or units of the device for performing actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to embodiments of the present invention, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0084] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0085] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A display panel, characterized in that, include: Multiple display modules are provided, each of which includes a power module, a drive module, an editable resistor, and a current detection module, wherein the power module, the editable resistor, the current detection module, and the drive module are connected in series. A control module is provided, which is connected to the editable resistors and the current detection modules in each of the display modules respectively. The control module is configured to output a resistance adjustment signal for each editable resistor based on the current signal obtained by each current detection module, and adjust the resistance of the corresponding editable resistor based on the resistance adjustment signal, so that the voltage output by the power module received by the drive module of each display module is the same. The control module includes an analog-to-digital conversion module and a processing module. The current detection module sends the detected current signal to the analog-to-digital conversion module, which converts the current signal into current data and sends it to the processing module. The processing module is configured to output the resistance signal required by the editable resistor based on the current data, and send the resistance signal to the editable resistor to achieve resistance adjustment. Specifically, the external voltage IR of the display module is at its maximum when the display module is at its maximum brightness setting; at maximum brightness, the external voltage of the display module is IR. max The external voltage of the display module is IR=I(R). 走线 +R 电阻 When the external voltage of the display module is IR max The resistance R of the editable resistor 电阻 =IR max / IR 走线 Where I is the current and R is the current. 走线 This represents the trace resistance.

2. The display panel according to claim 1, characterized in that, The power module includes a DC-DC converter, and the DC-DC converter, the programmable resistor, the current detection module, and the drive module are connected in series.

3. The display panel according to claim 1, characterized in that, The current detection module is configured to acquire the current signal of the corresponding display module in real time.

4. An external compensation method for the power supply voltage of a display panel, characterized in that, The display panel includes multiple independently powered display modules, and the external compensation method includes: An editable resistor and a current detection module are provided between the power supply module and the drive module of each of the display modules, and the power supply module, the editable resistor, the current detection module and the drive module are connected in series in sequence. A control module is provided, and the control module is connected to the programmable resistor and the current detection module in each of the display modules respectively; The current signal of the corresponding display module is obtained through each of the current detection modules; The control module acquires the current signals acquired by each of the current detection modules, and outputs multiple resistance adjustment signals according to the one-to-one correspondence of the current signals, and sends the multiple resistance adjustment signals to the multiple programmable resistors one-to-one correspondence; The programmable resistor adjusts its resistance according to the resistance adjustment signal so that the voltage output by the power module received by the driving module of each display module is the same; The control module includes an analog-to-digital conversion module and a processing module. The current detection module sends the detected current signal to the analog-to-digital conversion module, which converts the current signal into current data and sends it to the processing module. The processing module is configured to output the resistance signal required by the editable resistor based on the current data, and send the resistance signal to the editable resistor to achieve resistance adjustment. Specifically, the external voltage IR of the display module is at its maximum when the display module is at its maximum brightness setting; at maximum brightness, the external voltage of the display module is IR. max The external voltage of the display module is IR=I(R). 走线 +R 电阻 When the external voltage of the display module is IR max The resistance R of the editable resistor 电阻 =IR max / IR 走线 Where I is the current and R is the current. 走线 This represents the trace resistance.

5. The external compensation method according to claim 4, characterized in that, The current signal of the corresponding display module is obtained through each of the current detection modules, including: Set each of the aforementioned display modules to its maximum brightness setting; When the display module is at its maximum brightness, the current signal of the corresponding display module is obtained through each of the current detection modules.

6. The external compensation method according to claim 4, characterized in that, Before each of the display modules performs its initial display, the voltage output by the power module received by the drive module is compensated once by the current detection module, the editable resistor, and the control module.

7. The external compensation method according to claim 4, characterized in that, With a preset frame number as the preset period, in each preset period, the voltage output by the power module received by the drive module is compensated once through the current detection module, the editable resistor and the control module.

8. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 3.

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