Power supply adjusting device and method, display device, control method and device of display device, and display system

Abstract

The embodiment of the invention provides a power supply adjusting device and method, a display device, a control method and device of the display device and a display system, and the power supply adjusting device comprises a current feedback module which comprises a detection thin film transistor arranged on a display panel and is configured to generate a current feedback signal under the control of a preset control signal; the current current of the detection thin film transistor in a preset state is output, the preset state comprises at least one of an on state and an off state, and the preset control signal corresponds to the preset state; the current comparison module is configured to generate a current comparison result according to the current current and a reference current for detecting the thin film transistor in a preset state; and the power supply adjusting module is configured to adjust the output voltage of a preset power supply end according to the current comparison result, and the preset power supply end is used for providing the working voltage for the display panel. According to the invention, the problem of abnormal display caused by threshold voltage change of the thin film transistor is improved, and the application geographical range of the display device is expanded.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a power supply adjustment device and method, a display device and a control method and device thereof, and a display system. Background Art

[0002] Currently, display products are used in regions with moderate ambient temperatures, such as the Northern Hemisphere, Southeast Asia and the Middle East, and other regions with relatively low ambient temperatures. These regions experience significant temperature variations. Existing display products use internal thin-film transistors (TFTs) to control the display. After prolonged use in high or low ambient temperatures, the threshold voltage (Vth) of the TFTs within these products can drift significantly, reducing their adaptability to high and low voltages, leading to display anomalies. Summary of the Invention

[0003] The embodiments of the present disclosure provide a power supply regulating device and method, a display device and a control method and device thereof, and a display system to solve or alleviate one or more technical problems in the prior art.

[0004] As a first aspect of an embodiment of the present disclosure, an embodiment of the present disclosure provides a power supply adjustment device, including:

[0005] a current feedback module, comprising a detection thin film transistor disposed on the display panel, the current feedback module being configured to output a current of the detection thin film transistor in a preset state under the control of a preset control signal, the preset state including at least one of an on state and an off state, the preset control signal corresponding to the preset state;

[0006] a current comparison module connected to the current feedback module and configured to generate a current comparison result based on the current current and a reference current of the detection thin film transistor in a preset state;

[0007] The power regulating module is configured to regulate the output voltage of a preset power terminal according to the current comparison result, where the preset power terminal is used to provide an operating voltage to the display panel.

[0008] In some embodiments, the voltage of the preset control signal is the same as the output voltage of the preset power terminal.

[0009] In some embodiments, the display panel includes a display thin film transistor for controlling display, and each film layer of the detection thin film transistor is provided in the same layer as each film layer of the display thin film transistor.

[0010] In some embodiments, the detection thin film transistor is of the same type as the display thin film transistor.

[0011] In some embodiments, the power supply regulating device further includes a signal generating module, and the power supply regulating device satisfies at least one of the following:

[0012] The preset control signal includes a first control signal corresponding to the on state, and the signal generating module is used to generate the first control signal in a first preset time period;

[0013] The preset control signal includes a second control signal corresponding to the off state, and the signal generating module is used to generate the second control signal in a second preset time period.

[0014] In some embodiments, the number of detection thin film transistors is one or more, the gate of each detection thin film transistor is connected to a preset control signal, the first electrode of each detection thin film transistor is coupled to a first preset input signal, and the current comparison module is coupled to the second electrode of each detection thin film transistor.

[0015] In some embodiments, the preset power source includes at least one of the following:

[0016] The preset power supply terminal includes a first power output terminal of the power management module, the first power output terminal is used to output a first voltage, and the first power output terminal corresponds to the on state;

[0017] The preset power supply end includes a second power output end of the power management module, the second power output end is used to output a second voltage, and the second power output end corresponds to the off state.

[0018] As a second aspect of an embodiment of the present disclosure, an embodiment of the present disclosure provides a power supply adjustment method, including:

[0019] providing a preset control signal to the detection thin film transistor so that the detection thin film transistor outputs a current in a preset state, the preset state including at least one of an on state and an off state, the preset control signal corresponding to the preset state, and the detection thin film transistor being disposed on the display panel;

[0020] generating a current comparison result according to the current current and a reference current of the detection thin film transistor in a preset state;

[0021] According to the current comparison result, the output voltage of the preset power supply terminal is adjusted, and the preset power supply terminal is used to provide an operating voltage to the display panel.

[0022] In some embodiments, providing a preset control signal to the detection thin film transistor so that the detection thin film transistor outputs a current of a preset state includes at least one of the following:

[0023] In a first preset period, providing a first control signal to the detection thin film transistor so that the detection thin film transistor outputs a current on-state current;

[0024] During a second preset period, a second control signal is provided to the detection thin film transistor, so that the detection thin film transistor outputs a current off current in an off state.

[0025] In some embodiments, adjusting the output voltage of the predetermined power supply terminal according to the current comparison result includes at least one of the following:

[0026] adjusting a first voltage outputted by a first power output terminal of the power management module according to a first comparison result, wherein the first comparison result is obtained by comparing a current start-up current with a reference start-up current;

[0027] The second voltage outputted from the second power output terminal of the power management module is adjusted according to the second comparison result, wherein the second comparison result is obtained by comparing the current shutdown current with the reference shutdown current.

[0028] As a third aspect of an embodiment of the present disclosure, an embodiment of the present disclosure provides a display device, comprising any power supply regulating device of the present disclosure, and further comprising a display panel.

[0029] In some embodiments, the display panel includes a display area and a border area outside the display area, and the detection transistor in the power regulation device is located in the border area of ​​the display panel; the border area includes a first border area, and the display panel includes a gate drive circuit located in the first border area, and the preset power supply terminal in the power regulation device is used to provide an operating voltage to the gate drive circuit.

[0030] In some embodiments, the display panel includes N first thin film transistors, the display panel also includes a second border area located outside the display area, the N first thin film transistors are located in the second border area, the display area is provided with N data lines, the first electrodes of the N first thin film transistors are connected one-to-one with the N data lines, and the detection thin film transistor in the power supply adjustment device includes M first thin film transistors, M is greater than 1, and M≤N.

[0031] In some embodiments, the display panel also includes a first solder pad and a driving chip located in the second border area, and the display device also includes a timing control chip. The gates of the M first thin-film transistors are all coupled to the first solder pad, and the first electrodes of the M first thin-film transistors are all coupled to the driving chip. The timing control chip is used to provide a preset control signal to the gate of the first thin-film transistor through the first solder pad. The timing control chip is also used to control the driving chip to provide a first preset input signal to the first electrode of the first thin-film transistor.

[0032] In some embodiments, the second border area is further provided with a second pad, a third pad and a fourth pad, the second electrodes of the first part of the M first thin film transistors are coupled to the second pad, the second electrodes of the second part of the M first thin film transistors are coupled to the third pad, the second electrodes of the third part of the M first thin film transistors are coupled to the fourth pad, and the current comparison module is coupled to the second pad, the third pad and the fourth pad.

[0033] In some embodiments, the data line connected to the first portion of the first thin film transistor is connected to the first color sub-pixel, the data line connected to the second portion of the first thin film transistor is connected to the second color sub-pixel, and the data line connected to the third portion of the first thin film transistor is connected to the third color sub-pixel.

[0034] As a fourth aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a method for controlling a display device, which is applied to any display device of the present disclosure. The method includes a power regulation stage, a recovery stage, and a display stage:

[0035] In the power supply regulation stage: providing a preset control signal to the gate of the first thin film transistor and providing a first preset input signal to the first electrode of the first thin film transistor; generating a current comparison result based on the obtained current current of the first thin film transistor in a preset state and a reference current; and regulating the output voltage of the preset power supply terminal based on the current comparison result;

[0036] In the display stage: providing a second control signal to the gate of the first thin film transistor to turn off the first thin film transistor.

[0037] In some embodiments, the power regulation stage includes a first regulation stage and / or a second regulation stage.

[0038] In a first regulation phase, a second control signal is provided to the gate of the first thin film transistor to turn off the first thin film transistor, and a first preset input signal is provided to the first electrode of the first thin film transistor; a second comparison result is generated based on the obtained current off current of the first thin film transistor and the reference off current of the first thin film transistor; and a second voltage outputted from the second power output terminal of the power management module is regulated based on the second comparison result;

[0039] In the second adjustment stage, a first control signal is provided to the gate of the first thin film transistor to turn on the first thin film transistor, and a first preset input signal is provided to the first electrode of the first thin film transistor; a first comparison result is generated based on the current turn-on current of the first thin film transistor and the reference turn-on current of the first thin film transistor; and based on the first comparison result, the first voltage output from the first power output terminal of the power management module is adjusted.

[0040] In some embodiments, the system further includes a recovery phase between the power regulation phase and the display phase, and a black screen phase between the recovery phase and the display phase.

[0041] In the recovery phase: providing a second control signal to the gate of the first thin film transistor to turn off the first thin film transistor, and providing a second preset input signal to the first electrode of the first thin film transistor;

[0042] In the black picture stage: a second control signal is provided to the gate electrode of the first thin film transistor, and a third preset input signal is provided to the first electrode of the first thin film transistor, so that the display panel presents a black picture.

[0043] As a fifth aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a control device for a display device, for implementing any method of the present disclosure.

[0044] As a sixth aspect of an embodiment of the present disclosure, an embodiment of the present disclosure provides a display system, comprising any display device of the present disclosure, and further comprising a control device of the present disclosure.

[0045] In the technical solution of the embodiment of the present disclosure, a detection thin film transistor is disposed on a display panel, and the detection thin film transistor and the display thin film transistor are at the same ambient temperature. Thus, the current change of the detection thin film transistor can reflect the influence of the ambient temperature on the current of the display thin film transistor, and further reflect the influence of the ambient temperature on the threshold voltage of the display thin film transistor. The power supply adjustment module adjusts the output voltage of the preset power supply terminal based on the current comparison result. After the adjusted output voltage of the preset power supply terminal supplies power to the display panel, the adjusted output voltage can reduce the difference between the current current of the display thin film transistor and the reference current when controlling the display thin film transistor, thereby compensating the output voltage of the preset power supply terminal according to the threshold voltage change, reducing the influence of the threshold voltage change on the thin film transistor, improving the display abnormality caused by the threshold voltage change, and improving the display effect. In addition, in the present disclosure, the output voltage of the preset power supply terminal is adjusted in a timely manner according to the influence of the ambient temperature on the threshold voltage, so that the display panel can maintain a good display effect without being affected by the ambient temperature, thereby expanding the geographical range of use of the display device.

[0046] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present disclosure will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments according to the present disclosure and should not be regarded as limiting the scope of the present disclosure.

[0048] Figure 1 This is a structural block diagram of a power supply regulating device according to an embodiment of the present disclosure;

[0049] Figure 2 1 is a flow chart of a power regulation method according to an embodiment of the present disclosure;

[0050] Figure 3 This is a schematic structural diagram of a display device in one embodiment of the present disclosure;

[0051] Figure 4 for Figure 3 A timing diagram of the display device is shown. DETAILED DESCRIPTION

[0052] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present disclosure. Therefore, the drawings and description are to be considered as illustrative in nature and not restrictive.

[0053] The transistors used in all embodiments of the present invention can be thin-film transistors, field-effect transistors, or other devices with similar characteristics. Based on their function in the circuit, the transistors used in the embodiments of the present invention are primarily switching transistors. Since the source and drain of the switching transistors used here are symmetrical, their source and drain are interchangeable. In the embodiments of the present invention, the source (source electrode) is referred to as the first electrode, and the drain (drain electrode) is referred to as the second electrode, or the drain can be referred to as the first electrode and the source as the second electrode. According to the configuration in the accompanying drawings, the middle end of the transistor is defined as the gate (also called the gate electrode), the signal input end is the source, and the signal output end is the drain. The switching transistors used in the embodiments of the present invention can be P-type transistors (PMOS) or N-type transistors (NMOS). P-type transistors conduct when the gate is at a low level and are turned off when the gate is at a high level; N-type transistors conduct when the gate is at a high level and are turned off when the gate is at a low level. Furthermore, multiple signals in various embodiments of the present invention correspond to first and second potentials. The first and second potentials merely represent two different potential states of the signal and do not imply that the first or second potentials have specific values ​​throughout the text. In the embodiment of the present invention, the first potential is taken as an effective potential for illustration.

[0054] The coupling may include direct physical contact between the two ends or indirect connection between the two ends (eg, connection between the two ends via a signal line). The embodiment of the present invention does not limit the coupling method between the two ends.

[0055] In the related art, the display panel includes a gate driving circuit, the gate driving circuit includes a shift register, and the power management chip (PMIC) provides a constant high-level voltage signal V to the shift register. GH and a constant low-level voltage signal V GL The output signal of the gate drive circuit provides a gate signal to the pixel circuit to control the display of the pixel. It can be understood that the output signal of the gate drive circuit generally includes a first level signal and a second level signal. The first level signal is used to control the corresponding thin film transistor in the pixel circuit to turn on, and the second level signal is used to control the corresponding thin film transistor in the pixel circuit to turn off to achieve the display of the pixel. For example, the first level signal is a high level signal, and the second level signal is a low level signal. The voltage of the first level signal is generally the same as the high level voltage signal V GH Similarly, the voltage of the second level signal is usually the same as the low level voltage signal V GL When the gate voltage of a thin film transistor remains constant while the threshold voltage Vth drifts, for example, an increase in the Vth of an NMOS transistor will cause the on-current and off-current of the NMOS transistor to decrease; or a decrease in the Vth of an NMOS transistor will cause the on-current and off-current of the NMOS transistor to increase. In other words, the Vth drift of the thin film transistor causes the on-current and off-current of the thin film transistor to change, resulting in display abnormalities.

[0056] In order to solve some problems in the related art, an embodiment of the present disclosure provides a power supply regulating device. Figure 1 FIG. 1 is a structural block diagram of a power supply regulating device according to an embodiment of the present disclosure. Figure 1 As shown, the power supply regulating device includes a current feedback module 21 , a current comparison module 22 and a power supply regulating module 23 .

[0057] The current feedback module 21 includes a detection thin-film transistor T0, which is disposed on the display panel 10. Under the control of a preset control signal, the current feedback module 21 is configured to output the current of the detection thin-film transistor T0 in a preset state. The preset state includes at least one of an on state and an off state, and the preset control signal corresponds to the preset state. The preset control signal is used to control the detection thin-film transistor T0 to achieve the preset state.

[0058] The display panel 10 includes display thin-film transistors (TFTs) for controlling the display. These TFTs may include TFTs in gate driver circuits or pixel circuits. For a TFT, the on-current is the current flowing from the drain to the source when the TFT is on; the off-current is the leakage current flowing from the drain to the source when the TFT is off.

[0059] It is understood that changes in the threshold voltage Vth of a thin film transistor will cause changes in its output current, i.e., the drain-to-source current. Therefore, the current of the detection thin film transistor T0 can reflect the current threshold voltage. The detection thin film transistor T0 is disposed on the display panel 10. The detection thin film transistor T0 and the display thin film transistors in the display panel 10 are exposed to the same ambient temperature, so that changes in the threshold voltage Vth of the detection thin film transistor T0 are consistent with changes in the threshold voltage Vth of the display thin film transistor. Therefore, changes in the current of the detection thin film transistor T0 can reflect changes in the output current of the display thin film transistor, and thus, changes in the threshold voltage Vth of the display thin film transistor.

[0060] The preset control signal corresponds to the preset state. For example, the preset state is the on state (also called the on state), and the preset control signal includes a first control signal corresponding to the on state, and the first control signal can control the detection thin film transistor T0 to turn on or conduct; the preset state is the off state (also called the off state or the cut-off state), and the preset control signal includes a second control signal corresponding to the off state, and the second control signal can control the detection thin film transistor T0 to turn off or turn off. Correspondingly, the current current in the off state is the current off current, and the current current in the on state is the current on current. The detection thin film transistor T0 is turned on under the control of the first control signal and outputs the current on current of the on state. The detection thin film transistor T0 is turned off under the control of the second control signal and outputs the current off current of the off state.

[0061] A first preset input signal can be provided to the first electrode of the detection thin film transistor T0. When the detection thin film transistor T0 is turned on under the control of the first control signal, the detection thin film transistor T0 can output the current on current; when the detection thin film transistor T0 is turned off under the control of the second control signal, the detection thin film transistor T0 can output the current off current.

[0062] The current comparison module 22 is connected to the current feedback module 21 . After receiving the current current in the preset state, the current comparison module 22 can generate a current comparison result according to the current current and a reference current of the detection thin film transistor T0 in the preset state.

[0063] Exemplarily, the current current received by the current comparison module 22 may be an analog signal, and the current comparison module 22 may measure the current current and then compare the measured value with the reference current. Alternatively, the current current received by the current comparison module 22 may be a specific current value, and then the current value of the current current is compared with the reference current. When the current current received by the current comparison module 22 is a specific current value, the current feedback module 21 measures the current current and transmits the current value of the current current to the current comparison module 22; alternatively, a measurement module may be provided between the current feedback module 21 and the current comparison module 22, and the measurement module may measure the current current and transmit the measured current value of the current current to the current comparison module 22.

[0064] The reference current can be understood as the current of a preset state obtained by detecting the detection thin film transistor T0 before the display panel 10 leaves the factory. The reference current corresponds to the reference threshold voltage Vth0 of the detection thin film transistor T0. For example, before the display panel 10 leaves the factory, the threshold voltage of the detection thin film transistor T0 can be regarded as the reference threshold voltage Vth0. Before the display panel 10 leaves the factory, a first control signal can be provided to the detection thin film transistor T0 so that the detection thin film transistor T0 is in the on state, and the on current of the detection thin film transistor T0 is measured. The on current is the reference on current of the detection thin film transistor T0 in the on state. A second control signal can be provided to the detection thin film transistor T0 so that the detection thin film transistor T0 is in the off state, and the off current of the detection thin film transistor T0 is measured. The off current is the reference off current of the detection thin film transistor T0 in the off state.

[0065] Since the reference current corresponds to the reference threshold voltage Vth0 of the detection thin film transistor T0, the change of the current current of the detection thin film transistor T0 relative to the reference current can reflect the change of the threshold voltage Vth relative to the reference threshold voltage Vth0. Therefore, the current comparison result generated by the current comparison module 22 can reflect the drift of the threshold voltage relative to the reference threshold voltage, or can reflect the change of the threshold voltage relative to the reference threshold voltage.

[0066] The reference current corresponds to the current current, the current off current corresponds to the reference off current, and the current on current corresponds to the reference on current. In other words, the current comparison module 22 can generate a first comparison result based on the current on current and the reference on current; and the current comparison module 22 can generate a second comparison result based on the current off current and the reference off current. For example, the current comparison result can be the difference between the current current and the reference current.

[0067] The power supply adjustment module 23 is configured to adjust the output voltage of a preset power supply terminal based on the current comparison result to reduce the difference between the current current and the reference current. The preset power supply terminal is used to provide operating power to the display panel 10. Based on the current comparison result, the difference between the current current of the detection thin film transistor T0 and the reference current can be known. The difference between the current current and the reference current can reflect the change in the threshold voltage Vth of the detection thin film transistor T0 relative to the reference threshold voltage Vth0. Since the detection thin film transistor T0 and the display thin film transistor are both located on the display panel 10, the change in the threshold voltage of the detection thin film transistor T0 is consistent with the change in the threshold voltage of the display thin film transistor. Therefore, based on the current comparison result, the output voltage of the preset power supply terminal can be adaptively adjusted, thereby reducing the difference between the output current of the display thin film transistor and its reference current, thereby achieving compensation for the output voltage of the preset power supply terminal based on the change in the threshold voltage Vth of the detection thin film transistor T0, and reducing the impact of the change in the threshold voltage Vth on the thin film transistor.

[0068] In the present disclosure, the detection thin film transistor T0 is disposed on the display panel 10, and the detection thin film transistor T0 and the display thin film transistor are at the same ambient temperature. Thus, the current change of the detection thin film transistor T0 can reflect the influence of the ambient temperature on the current of the display thin film transistor, and further reflect the influence of the ambient temperature on the threshold voltage of the display thin film transistor. The power supply adjustment module 23 adjusts the output voltage of the preset power supply terminal based on the current comparison result. After the adjusted output voltage of the preset power supply terminal supplies power to the display panel 10, the adjusted output voltage can reduce the difference between the current current of the display thin film transistor and the reference current when controlling the display thin film transistor. This achieves compensation of the output voltage of the preset power supply terminal based on the change in the threshold voltage Vth, reduces the influence of the change in the threshold voltage Vth on the thin film transistor, improves the display abnormality caused by the change in the threshold voltage Vth, and improves the display effect. In addition, in the present disclosure, the output voltage of the preset power supply terminal is adjusted in a timely manner based on the influence of the ambient temperature on the threshold voltage Vth, so that the display panel 10 can maintain a good display effect without being affected by the ambient temperature, thereby expanding the geographical range of use of the display device.

[0069] In one embodiment, the voltage of the preset control signal can be the same as the output voltage of the preset power supply terminal. The voltage of the preset control signal can be understood as a voltage that can enable the detection thin film transistor T0 to achieve a preset state. For example, when the detection thin film transistor T0 is an NMOS, for the off state, the voltage of the preset control signal can be a low-level signal in the preset control signal; for the on state, the voltage of the preset control signal can be a high-level signal in the preset control signal. When the detection thin film transistor T0 is a PMOS, for the off state, the voltage of the preset control signal can be a high-level signal in the preset control signal; for the on state, the voltage of the preset control signal can be a low-level signal in the preset control signal.

[0070] The display TFT in the display panel 10 is controlled by the output voltage of the preset power supply terminal. By setting the voltage of the preset control signal to be the same as the output voltage of the preset power supply terminal, the detection TFT can be made to more realistically simulate the display TFT, and closed-loop adjustment of the output voltage of the preset power supply terminal can be achieved, so that the output voltage of the preset power supply terminal can be more accurately adjusted according to the change of the threshold voltage Vth, thereby improving the accuracy of voltage compensation and improving display abnormalities caused by threshold voltage Vth drift.

[0071] To further improve the consistency between the detection TFT and the display TFT, the layers of the detection TFT are co-located with those of the display TFT. For example, the gate, active layer, and source / drain electrodes of the detection TFT are co-located with those of the display TFT. This ensures consistent manufacturing processes between the detection TFT and the display TFT, further ensuring consistent variations between the detection and display TFTs.

[0072] In one embodiment, the detection thin-film transistor T0 can be a display TFT. For example, the detection TFT is part of the display TFT. In another embodiment, to prevent the detection TFT from affecting the display, a separate detection TFT can be fabricated on the display panel 10, i.e., the detection TFT does not participate in the display. The detection TFT can be disposed in an area outside the display area AA of the display panel 10.

[0073] In one embodiment, the current comparison module 22 can be implemented using a circuit. For example, the current comparison module 22 can include a current comparison circuit, such as a current comparator. After the current current enters the current comparison circuit, the current comparison circuit compares the current current with a reference current and outputs the current comparison result at an output terminal.

[0074] In another embodiment, the current comparison module 22 can be implemented in software. For example, the current comparison module 22 can subtract the current current from the reference current. The resulting current comparison structure is the difference between the current current and the reference current. The power supply adjustment module 23 adjusts the output voltage of the preset power supply terminal based on the difference.

[0075] The power regulation module 23 can be a separate module or a functional module integrated into the power management module 30. The power regulation module 23 can pre-store a corresponding relationship between current difference and voltage, such as a relationship table between current difference and voltage. After receiving the current comparison result, the power regulation module 23 can obtain the voltage value or voltage adjustment value corresponding to the current comparison result by querying the relationship table between current difference and voltage. Thus, the output voltage of the preset power supply terminal can be adjusted to reduce the difference between the output current of the display thin film transistor and its reference current. When the preset power supply terminal provides the adjusted voltage to the display panel 10, the adjusted voltage matches the threshold voltage Vth after the display TFT drifts, thereby improving the display abnormality caused by the threshold voltage Vth drift and improving the display effect.

[0076] It is understood that the current difference and voltage correspondence pre-stored in the power regulation module 23 matches the TFT model. For example, when the TFT is an NMOS, the current difference and voltage correspondence is the same as that of an NMOS; when the TFT is a PMOS, the current difference and voltage correspondence is the same as that of a PMOS.

[0077] Those skilled in the art will appreciate that the corresponding relationship between the current difference and the voltage can be obtained by pre-testing the TFT.

[0078] To provide a preset control signal to the current feedback module 21, the power regulation device may further include a signal generation module. The signal generation module may generate different control signals at different time periods. For example, the signal generation module may generate a first control signal during a first preset time period to control the detection TFT to turn on. The signal generation module may generate a second control signal during a second preset time period to control the detection TFT to turn off.

[0079] Exemplarily, the preset power supply terminal may include a first power output terminal OUT1 and a second power output terminal OUT2. The voltage of the second control signal may be the same as the output voltage of the second power output terminal OUT2, and the voltage of the first control signal may be the same as the output voltage of the first power output terminal OUT1. The signal generation module generates a first control signal during a first preset period, so that during the first preset period, the current feedback module 21 can output the current on-current, and the power regulation module 23 can adjust the output voltage of the first power output terminal OUT1 based on a first comparison result between the current on-current and the reference on-current. The signal generation module generates a second control signal during a second preset period, so that during the second preset period, the current feedback module 21 can output the current off-current, and the power regulation module 23 can adjust the output voltage of the second power output terminal OUT2 based on a second comparison result between the current off-current and the reference off-current. This achieves the adjustment of the output voltage of the first power output terminal OUT1 and the output voltage of the second power output terminal OUT2 in two different time periods, while simultaneously improving display anomalies caused by the TFT on state and display anomalies caused by the TFT off state, further enhancing the display effect.

[0080] Figure 1 The detection TFT shown in the figure is an NMOS. Correspondingly, the second power output terminal OUT2 is a low-level output terminal VGL, and the first power output terminal OUT1 is a high-level output terminal VGH. When the detection TFT is a PMOS, the second power output terminal OUT2 is a high-level output terminal VGH, and the first power output terminal OUT1 is a low-level output terminal VGL.

[0081] In order to make the detection TFT better simulate the TFT in the gate drive circuit, the detection TFT type is the same as the display TFT type. When the display TFT is NMOS, the detection TFT is NMOS; when the display TFT is PMOS, the detection TFT is PMOS.

[0082] The current on current and the current off current of the detection TFT are relatively small. In order to improve the accuracy of current detection, the number of the detection thin film transistors T0 can be one or more, such as Figure 1 As shown, the gate of each detection thin film transistor T0 is connected to a preset control signal, the first electrode of each detection thin film transistor T0 is coupled to a first preset input signal, and the current comparison module 22 is coupled to the second electrode of each detection thin film transistor T0. The signal generation module can also generate a first preset input signal.

[0083] The specific number of the detection thin film transistors T0 can be set as needed and is not specifically limited here.

[0084] When multiple detection thin film transistors T0 are used, for the preset control signal being the second control signal, the current current includes the sum of the current off currents of the multiple detection thin film transistors T0 in the off state; for the preset control signal being the first control signal, the current current includes the sum of the current on currents of the multiple detection thin film transistors T0 in the on state.

[0085] In such a structure, multiple detection thin film transistors T0 are arranged in parallel, and the current current received by the current comparison module 22 is the sum of the currents output by multiple detection thin film transistors T0, which increases the value of the current, can improve the accuracy of current detection, and then improve the accuracy of the output voltage regulation of the power supply regulation module 23, and more effectively improve the display abnormality problem caused by Vth drift.

[0086] In one embodiment, the preset power terminal may include a second power output terminal OUT2 of the power management module 30. The second power output terminal OUT2 is configured to output a second voltage. The second power output terminal OUT2 corresponds to the off state. Thus, the second voltage of the second power output terminal OUT2 is the same as the voltage of the second control signal.

[0087] In one embodiment, the preset power terminal may include a first power output terminal OUT1 of the power management module 30. The first power output terminal OUT1 is configured to output a first voltage. The first power output terminal OUT1 corresponds to an on state. Thus, the first voltage of the first power output terminal OUT1 is the same as the voltage of the first control signal.

[0088] In the display panel 10, the PMIC provides working power to the display panel 10, and the power regulation module 23 directly regulates the output voltage of the second power output terminal OUT2 and the first power output terminal OUT1 in the power management module 30, thereby realizing direct regulation of the working voltage of the display panel 10 and improving the regulation accuracy.

[0089] An embodiment of the present disclosure further provides a power supply regulation method, which can be applied to the power supply regulation device in the above embodiment, such as Figure 2 As shown, the power supply adjustment method may include steps S21 to S23.

[0090] In step S21 , a preset control signal is provided to the detection thin film transistor T0 so that the detection thin film transistor T0 outputs a current of a preset state, where the preset state includes at least one of an on state and an off state, and the preset control signal corresponds to the preset state. The detection thin film transistor T0 is set on the display panel 10 .

[0091] In step S22 , a current comparison result is generated according to the current current and a reference current of the detection thin film transistor T0 in a preset state.

[0092] In step S23 , the output voltage of a preset power supply terminal is adjusted according to the current comparison result. The preset power supply terminal is used to provide an operating voltage to the display panel 10 .

[0093] In one embodiment, providing a preset control signal to the detection thin film transistor T0 so that the detection thin film transistor T0 outputs a current current in a preset state may include at least one of the following: in a first preset period, providing a first control signal to the detection thin film transistor T0 so that the detection thin film transistor T0 outputs a current on-current in an on-state; and in a second preset period, providing a second control signal to the detection thin film transistor T0 so that the detection thin film transistor T0 outputs a current off-current in an off-state.

[0094] In one embodiment, the output voltage of the preset power supply terminal is adjusted according to the current comparison result, including at least one of the following: according to the first comparison result, the first voltage output from the first power output terminal OUT1 of the power management module 30 is adjusted, and the first comparison result is obtained by comparing the current turn-on current with the reference turn-on current; according to the second comparison result, the second voltage output from the second power output terminal OUT2 of the power management module 30 is adjusted, and the second comparison result is obtained by comparing the current turn-off current with the reference turn-off current.

[0095] The specific process of the power supply regulation method can be understood by referring to the power supply regulation device, which will not be described in detail here.

[0096] Figure 3 This is a schematic diagram of the structure of a display device in one embodiment of the present disclosure. Another embodiment of the present disclosure provides a display device comprising the power supply regulator of any embodiment of the present disclosure and a display panel 10. In the display device, the power supply regulator appropriately adjusts the output voltage of a preset power supply terminal based on the effect of ambient temperature on the threshold voltage Vth, enabling the display panel 10 to maintain a good display quality without being affected by ambient temperature, thereby expanding the geographical range of the display device.

[0097] The display panel 10 includes a display area AA and a frame area outside the display area AA. The detection transistor in the power supply regulating device can be located in the frame area of ​​the display panel 10. Placing the detection TFT in the frame area can prevent the detection TFT from affecting the pixels in the display area AA and the display effect.

[0098] The frame area may include a first frame area VA1 , the display panel 10 includes a gate drive circuit (Gate on Array, GOA circuit) located in the first frame area VA1 , and a preset power supply terminal in the power regulation device is used to provide an operating voltage to the gate drive circuit.

[0099] like Figure 3 As shown, the display panel 10 includes N first thin film transistors, namely, first thin film transistors T11, T12, ..., T1n. The display panel 10 also includes a second border area VA2 located outside the display area AA, and the N first thin film transistors are located in the second border area VA2. For example, the second border area VA2 can be the lower border of the display panel 10. The display area AA is provided with N data lines, and the first electrodes of the N first thin film transistors are connected to the N data lines in a one-to-one correspondence. The detection thin film transistor T0 in the power supply regulating device can include M first thin film transistors. M>1 and M≤N. For example, M=N.

[0100] In the related art, the display panel 10 includes a SW circuit 40, in which N first thin-film transistors are located. During the display phase of the display panel 10, the gates of the N first thin-film transistors in the SW circuit are all connected to a shutdown signal. In other words, the N first thin-film transistors are in the off state during the display phase and do not participate in the display. Reusing M of the N first thin-film transistors as the detection thin-film transistor T0 eliminates the need to re-install the detection thin-film transistor T0 on the display panel 10, reduces modifications to the display panel 10, and does not affect the display.

[0101] The display panel 10 may further include a first pad 61 and a driver chip 51 located in the second border area VA2. For example, the first pad 61 is a SW pad in the SW circuit. The display device further includes a control module 52. For example, the control module 52 may include a timing control chip TCON. The gates of the plurality of first thin film transistors are coupled to the first pad 61, and the first electrodes of the plurality of first thin film transistors are coupled to the driver chip 51 through the connecting line P1. The control module 52 is used to provide a preset control signal to the gate of the first thin film transistor through the first pad 61, and is also used to control the driver chip 51 to provide a first preset input signal to the first electrode of the first thin film transistor.

[0102] By adopting the control module 52 to provide a preset control signal and providing a first preset input signal through the driver chip 51, the signal generating module reuses the timing control chip and the driver chip 51 in the display device, and there is no need to set up a separate signal generating module, which further reduces the hardware changes to the display device and is conducive to implementing the technical solution of the present invention in related display devices.

[0103] like Figure 3As shown, the second border area VA2 is further provided with a second pad 62, a third pad 63, and a fourth pad 64. The second electrodes of a first portion of the plurality of first thin film transistors are all coupled to the second pad 62, the second electrodes of a second portion of the plurality of first thin film transistors are all coupled to the third pad 63, the second electrodes of a third portion of the plurality of first thin film transistors are all coupled to the fourth pad 64, and the current comparison module 22 is coupled to the second pad 62, the third pad 63, and the fourth pad 64.

[0104] For example, the N first thin-film transistors can be divided into three parts. The data lines connected to the first thin-film transistors in the first part are connected to the first color sub-pixels, the data lines connected to the second part of the first thin-film transistors are connected to the second color sub-pixels, and the data lines connected to the third part of the first thin-film transistors are connected to the third color sub-pixels. The second pad 62, the third pad 63, and the fourth pad 64 can be called an R pad, a G pad, and a B pad, respectively. During the display panel 10 test, the display panel 10 can be tested by applying data signals to the corresponding sub-pixel columns through the R pad, the G pad, and the B pad.

[0105] By setting the current comparison module 22 to be coupled with the second pad 62, the third pad 63 and the fourth pad 64, the current comparison module 22 is coupled with the second electrodes of multiple first thin film transistors, so that the current comparison module 22 can receive the sum of the currents output by each first thin film transistor.

[0106] The display device may include a printed circuit board, and the control module 52 and each module of the power supply regulating device may be arranged on the printed circuit board.

[0107] An embodiment of the present disclosure provides a control method for a display device, which is applicable to the display device of any embodiment of the present disclosure. The control method may include a power regulation phase, a recovery phase, and a display phase.

[0108] In the power supply regulation stage, a preset control signal is provided to the gate of the first thin film transistor, and a first preset input signal is provided to the first electrode of the first thin film transistor; a current comparison result is generated based on the current current of the first thin film transistor in the preset state and the reference current obtained; and the output voltage of the preset power supply terminal is adjusted based on the current comparison result.

[0109] In the display stage: providing a second control signal to the gate of the first thin film transistor to turn off the first thin film transistor.

[0110] The control method disclosed herein adjusts the output voltage of a preset power supply terminal according to the current comparison result during the power supply adjustment stage, and provides a second control signal to the gate of the first thin-film transistor to keep the first thin-film transistor in the off state during the display stage, thereby adjusting the output voltage of the preset power supply terminal each time display is performed, thereby avoiding display abnormalities caused by threshold voltage drift of the thin-film transistor in the display panel 10 and improving the display effect during the display stage.

[0111] In one embodiment, the power regulation phase includes a first regulation phase. In the first regulation phase, a second control signal is provided to the gate of the first thin-film transistor to turn off the first thin-film transistor, and a first preset input signal is provided to the first electrode of the first thin-film transistor. A second comparison result is generated based on the obtained current off-current of the first thin-film transistor and the reference off-current of the first thin-film transistor. Based on the second comparison result, the second voltage outputted by the second power output terminal OUT2 of the power management module 30 is regulated. In this way, the output voltage of the second power output terminal OUT2 can be regulated.

[0112] In another embodiment, the power regulation stage includes a second regulation stage. In the second regulation stage, a first control signal is provided to the gate of the first thin-film transistor to turn on the first thin-film transistor, and a first preset input signal is provided to the first electrode of the first thin-film transistor. A first comparison result is generated based on the obtained current turn-on current of the first thin-film transistor and the reference turn-on current of the first thin-film transistor. Based on the first comparison result, the first voltage outputted by the first power output terminal OUT1 of the power management module 30 is regulated. In this way, the output voltage of the first power output terminal OUT1 can be regulated.

[0113] The control method may further include a recovery phase between the power regulation phase and the display phase, and a black screen phase between the recovery phase and the display phase.

[0114] In the recovery phase: a second control signal is provided to the gate of the first thin film transistor to turn off the first thin film transistor, and a second preset input signal is provided to the first electrode of the first thin film transistor.

[0115] In the black screen stage: a second control signal is provided to the gate electrode of the first thin film transistor, and a third preset input signal is provided to the first electrode of the first thin film transistor, so that the display panel 10 presents a black screen.

[0116] In one embodiment, the control method may further include a power-on phase, which is located before the power regulation phase. Therefore, the control method of the display device may sequentially include: a power-on phase, a power regulation phase, a recovery phase, a black screen phase, and a display phase.

[0117] Figure 4 for Figure 3 A timing diagram of the display device shown. The control method of the display device includes a power-on phase T1, a power regulation phase, a recovery phase T4, a black screen phase T5, and a display phase T6, wherein the power regulation phase includes a first regulation phase T2 and / or a second regulation phase T3. The first thin film transistor is an NMOS. The second control signal can be a low level signal V GL , low level signal V GL The first thin film transistor can be turned off; the first control signal can be a high level signal V GH , high level signal V GH The first thin film transistor can be turned on. Figure 3 and Figure 4 The working process of the display device disclosed in the present invention is described.

[0118] In the power-on phase, the timing control chip provides a low-level signal V to the gate of the first thin film transistor through the first pad 61, namely the SW pad. GL The control module 52 controls the driving chip 51 to provide a first preset input signal to the first electrode of the first thin film transistor. The voltage of the first preset input signal may be a reference voltage Vcom of the display panel 10 .

[0119] In the first adjustment stage T2, the control module 52 provides a low level signal V to the gate of the first thin film transistor through the SW pad. GL The control module 52 controls the driving chip 51 to provide a first preset input signal, namely a reference voltage Vcom, to the first electrode of the first thin film transistor. GL The current comparison module 22 receives the current shutdown current of the first thin film transistor and generates a second comparison result according to the current shutdown current and the reference shutdown current; the power regulation module 23 adjusts the second voltage outputted from the second power output terminal OUT2 of the power management chip according to the second comparison result, that is, the low-level operating voltage V GL Make adjustments.

[0120] In the second adjustment stage T3, the control module 52 provides a high level signal V to the gate of the first thin film transistor through the SW pad. GH The control module 52 controls the driving chip 51 to provide a first preset input signal to the first electrode of the first thin film transistor. GHThe current comparison module 22 receives the current on-state current of the first thin film transistor and generates a first comparison result according to the current on-state current and the reference on-state current; the power regulation module 23 adjusts the first voltage outputted from the first power output terminal OUT1 of the power management chip according to the first comparison result, that is, the high-level operating voltage V GH Make adjustments.

[0121] In the recovery phase T4, the control module 52 provides a low level signal V to the gate of the first thin film transistor through the SW pad. GL , turn off the first thin film transistor, and the control module 52 controls the driving chip 51 to provide the second preset input signal to the first electrode of the first thin film transistor. In the recovery phase T4, stop the high level working voltage V GH and low-level operating voltage V GL Therefore, this stage is called the recovery stage. In the recovery stage, the first power output terminal OUT1 stably outputs the regulated high-level working voltage V GH The second power supply output terminal OUT2 stably outputs the adjusted low-level operating voltage V GL The second preset input signal may be the same as the first preset input signal, both being the reference voltage Vcom.

[0122] In the black screen stage T5, the control module 52 provides a low level signal V to the gate of the first thin film transistor through the SW pad. GL , keeping the first thin film transistor in an off state, the control module 52 provides a third preset input signal to the first electrode of the first thin film transistor via the driver chip 51. The third preset input signal is provided to each data line in the display area AA, causing the display panel 10 to display a black screen. The third preset input signal can be a pulse signal. The pulse signal can include a pulse signal formed by a third level signal and a fourth level signal, where the third level signal is greater than the reference voltage Vcom and the fourth level signal is less than the reference voltage Vcom.

[0123] In the display stage T6, the control module 52 provides a low level signal V to the gate of the first thin film transistor through the SW pad. GL , keeping the first thin film transistor in the off state; the control module 52 controls the display of the display panel 10 through the driving chip 51. In the display stage, the first thin film transistor is in the off state and does not affect the display.

[0124] exist Figure 4 In the embodiment, the first adjustment stage T2 is performed first, and then the second adjustment stage T3 is performed. It is understood that in another embodiment, the second adjustment stage may be performed first, and then the first adjustment stage.

[0125] The present disclosure Figure 3 The first thin film transistor in the embodiment is an NMOS. In other embodiments, the first thin film transistor may be a PMOS. When the first thin film transistor is a PMOS, correspondingly, in the first adjustment phase T2, the recovery phase T4, and the black screen phase T5, the control module 52 provides a high-level signal to the gate of the first thin film transistor via the SW pad to control the first thin film transistor to be in the off state. In the second adjustment phase T3, the control module 52 provides a low-level signal to the gate of the first thin film transistor via the SW pad to control the first thin film transistor to be in the on state.

[0126] The technical solution disclosed in the present invention performs the first adjustment stage and / or the second adjustment stage each time the display device is powered on, and then performs display, thereby achieving the goal of adjusting the high-level working voltage V GH and low-level operating voltage V GL The compensation improves the display abnormality problem caused by the drift of the threshold voltage Vth of the thin film transistor, enhances the display effect, and expands the geographical range of the display device.

[0127] An embodiment of the present disclosure further provides a control device for a display device, which is used to implement a control method for a display device.

[0128] An embodiment of the present disclosure further provides a display system, comprising the display device in any embodiment of the present disclosure, and further comprising the control device in the embodiment of the present disclosure.

[0129] The display panel in the embodiment of the present disclosure can be various types of display panels such as a liquid crystal display panel, an organic light emitting diode (OLED) display panel or a quantum dot display panel. Correspondingly, the display device can be a liquid crystal display device, an OLED display device or a quantum dot display device.

[0130] The display device can be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, or the like.

[0131] In the description of this specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0132] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout the present disclosure, "plurality" means two or more, unless otherwise specifically defined.

[0133] In this disclosure, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections, electrical connections, or communication; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on specific circumstances.

[0134] In the present disclosure, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0135] The disclosure above provides many different embodiments or examples for implementing different structures of the present disclosure. In order to simplify the present disclosure, the components and settings of specific examples are described above. Of course, these are merely examples and are not intended to limit the present disclosure. In addition, the present disclosure may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0136] The above are only specific embodiments of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any person skilled in the art can easily conceive of various modifications or substitutions within the technical scope disclosed in this disclosure, and such modifications or substitutions should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A power supply regulating device, characterized in that: include: a current feedback module, comprising a detection thin film transistor disposed on the display panel, the current feedback module being configured to output a current of the detection thin film transistor in a preset state under the control of a preset control signal, the preset state comprising at least one of an on state and an off state, the preset control signal corresponding to the preset state; a current comparison module, connected to the current feedback module, and configured to generate a current comparison result according to the current current and a reference current of the detection thin film transistor in the preset state; The power regulating module is configured to regulate the output voltage of a preset power supply terminal according to the current comparison result, where the preset power supply terminal is used to provide an operating voltage to the display panel.

2. The power supply regulating device according to claim 1, wherein: The voltage of the preset control signal is the same as the output voltage of the preset power supply terminal.

3. The power supply regulating device according to claim 1, wherein: The display panel includes a display thin film transistor for controlling display, and each film layer of the detection thin film transistor is arranged in the same layer as each film layer of the display thin film transistor.

4. The power supply regulating device according to claim 3, wherein: The detection thin film transistor is of the same type as the display thin film transistor.

5. The power supply regulating device according to claim 1, wherein: It also includes a signal generating module, and the power regulating device satisfies at least one of the following: The preset control signal includes a first control signal corresponding to the on state, and the signal generating module is configured to generate the first control signal in a first preset time period; The preset control signal includes a second control signal corresponding to the closed state, and the signal generating module is configured to generate the second control signal in a second preset time period.

6. The power supply regulating device according to claim 1, wherein: The number of the detection thin film transistors is one or more, the gate of each detection thin film transistor is connected to the preset control signal, the first electrode of each detection thin film transistor is coupled to the first preset input signal, and the current comparison module is coupled to the second electrode of each detection thin film transistor.

7. The power supply regulating device according to claim 1, wherein: The preset power supply terminal includes at least one of the following: The preset power supply terminal includes a first power output terminal of the power management module, the first power output terminal is used to output a first voltage, and the first power output terminal corresponds to the turned-on state; The preset power supply end includes a second power output end of the power management module, the second power output end is used to output a second voltage, and the second power output end corresponds to the shutdown state.

8. A power supply regulation method, characterized in that: include: providing a preset control signal to a detection thin film transistor so that the detection thin film transistor outputs a current in a preset state, wherein the preset state includes at least one of an on state and an off state, the preset control signal corresponds to the preset state, and the detection thin film transistor is disposed on the display panel; generating a current comparison result according to the current current and a reference current of the detection thin film transistor in a preset state; An output voltage of a preset power supply terminal is adjusted according to the current comparison result, and the preset power supply terminal is used to provide an operating voltage to the display panel.

9. The method according to claim 8, characterized in that The providing a preset control signal to the detection thin film transistor so that the detection thin film transistor outputs a current of a preset state includes at least one of the following: In a first preset time period, providing a first control signal to the detection thin film transistor so that the detection thin film transistor outputs a current turn-on current in the turn-on state; In a second preset period, a second control signal is provided to the detection thin film transistor, so that the detection thin film transistor outputs the current off current of the off state.

10. The method according to claim 9, characterized in that The adjusting the output voltage of the preset power supply terminal according to the current comparison result includes at least one of the following: adjusting a first voltage outputted by a first power output terminal of a power management module according to a first comparison result, wherein the first comparison result is obtained by comparing the current start-up current with a reference start-up current; The second voltage outputted from the second power output terminal of the power management module is adjusted according to a second comparison result, wherein the second comparison result is obtained by comparing the current shutdown current with a reference shutdown current.

11. A display device, characterized in that: The invention comprises the power regulating device according to any one of claims 1 to 7, and further comprises a display panel.

12. The display device according to claim 11, wherein The display panel includes a display area and a border area outside the display area, and the detection transistor in the power supply adjustment device is located in the border area of ​​the display panel; the border area includes a first border area, and the display panel includes a gate drive circuit located in the first border area. The preset power supply terminal in the power supply adjustment device is used to provide an operating voltage to the gate drive circuit.

13. The display device according to claim 11, wherein The display panel includes N first thin film transistors, and the display panel also includes a second border area located outside the display area. The N first thin film transistors are located in the second border area. The display area is provided with N data lines. The first electrodes of the N first thin film transistors are connected to the N data lines in a one-to-one correspondence. The detection thin film transistor in the power supply adjustment device includes M first thin film transistors, M is greater than 1, and M≤N.

14. The display device according to claim 13, wherein: The display panel also includes a first solder pad and a driving chip located in the second border area. The display device also includes a timing control chip. The gates of the M first thin-film transistors are all coupled to the first solder pad, and the first electrodes of the M first thin-film transistors are all coupled to the driving chip. The timing control chip is used to provide a preset control signal to the gate of the first thin-film transistor through the first solder pad. The timing control chip is also used to control the driving chip to provide a first preset input signal to the first electrode of the first thin-film transistor.

15. The display device according to claim 13, wherein The second border area is also provided with a second pad, a third pad and a fourth pad, the second poles of the first part of the M first thin film transistors are all coupled to the second pad, the second poles of the second part of the M first thin film transistors are all coupled to the third pad, the second poles of the third part of the M first thin film transistors are all coupled to the fourth pad, and the current comparison module is coupled to the second pad, the third pad and the fourth pad.

16. The display device according to claim 15, wherein: The data line connected to the first part of the first thin film transistor is connected to the first color sub-pixel, the data line connected to the second part of the first thin film transistor is connected to the second color sub-pixel, and the data line connected to the third part of the first thin film transistor is connected to the third color sub-pixel.

17. A method for controlling a display device, characterized in that: Applied to the display device according to any one of claims 11 to 16, the method comprises a power regulation stage, a recovery stage, and a display stage: In the power supply adjustment stage: providing a preset control signal to the gate of the first thin film transistor, and providing a first preset input signal to the first electrode of the first thin film transistor; generating a current comparison result according to the acquired current current of the first thin film transistor in a preset state and a reference current; adjusting the output voltage of the preset power supply terminal according to the current comparison result; In the display stage: providing the second control signal to the gate of the first thin film transistor to turn off the first thin film transistor.

18. The method according to claim 17, characterized in that The power supply regulation stage includes a first regulation stage and / or a second regulation stage, In the first adjustment phase, providing the second control signal to the gate of the first thin film transistor to turn off the first thin film transistor, and providing the first preset input signal to the first electrode of the first thin film transistor; generating a second comparison result according to the acquired current off-current of the first thin film transistor and the acquired reference off-current of the first thin film transistor; adjusting a second voltage outputted by a second power output terminal of the power management module according to the second comparison result; In the second adjustment phase, a first control signal is provided to the gate of the first thin film transistor to turn on the first thin film transistor, and a first preset input signal is provided to the first electrode of the first thin film transistor; generating a first comparison result according to the acquired current turn-on current of the first thin film transistor and a reference turn-on current of the first thin film transistor; According to the first comparison result, a first voltage outputted from the first power output terminal of the power management module is adjusted.

19. The method according to claim 17, wherein The method further includes a recovery phase between the power supply adjustment phase and the display phase, and a black screen phase between the recovery phase and the display phase. In the recovery phase: providing a second control signal to the gate of the first thin film transistor to turn off the first thin film transistor, and providing a second preset input signal to the first electrode of the first thin film transistor; In the black screen stage: providing the second control signal to the gate of the first thin film transistor, and providing a third preset input signal to the first electrode of the first thin film transistor, so that the display panel presents a black screen.

20. A control device for a display device, characterized in that: Used to implement the method according to any one of claims 17 to 19.

21. A display system, characterized in that: The display device comprises any one of 11-16, and further comprises the control device according to claim 20.

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