Power supply control circuit, method and system, controller and display device

Abstract

The embodiment of the invention provides a power supply control circuit, method and system, a controller and a display device. Relates to the technical field of display, and comprises a detection sub-circuit which is respectively coupled with a first voltage end and a first node and is configured to output a control signal to the first node based on a preset voltage and a to-be-detected voltage, and the to-be-detected voltage is the voltage provided by the first voltage end; the control sub-circuit comprises a first control sub-module and a second control sub-module, the first control sub-module is respectively coupled with the first node, a first power supply end and a power supply node, and the second control sub-module is respectively coupled with the first power supply end, the power supply node and a first reference ground; the power supply node is coupled with the voltage input end of the power supply module; the control sub-circuit is configured to restart the power supply module when the control signal is the first signal. The problem of splash screen in the prior art can be solved.

Description

Technical Field

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

[0002] VCOM (common electrode voltage) is the reference voltage for the deflection of liquid crystal molecules and has a direct impact on the liquid crystal display effect. In liquid crystal displays, the instability of the VCOM voltage may lead to uneven pixel luminescence intensity, resulting in screen flickering.

[0003] In the prior art, the VCOM voltage is usually adjusted once before the LCD screen leaves the factory to reduce the impact of the VCOM voltage on the backlight flicker in the LCD screen. However, due to differences in process and changes in the use environment, this static adjustment method often cannot adapt to all usage scenarios, resulting in the VCOM voltage offset problem still existing. After the screen flicker problem occurs, the user needs to return the product to the manufacturer for repair and adjustment, which seriously affects the user experience. Summary of the invention

[0004] Embodiments of the present disclosure provide a power control circuit, method, system, controller and display device to solve the screen flickering problem in the prior art.

[0005] As a first aspect of an embodiment of the present disclosure, an embodiment of the present disclosure provides a power supply control circuit, comprising: a detection subcircuit, coupled to a first voltage terminal and a first node, respectively, and configured to output a control signal to the first node based on a preset voltage and a voltage to be measured, wherein the voltage to be measured is a voltage provided by the first voltage terminal; a control subcircuit, comprising a first control submodule and a second control submodule, wherein the first control submodule is coupled to the first node, the first power supply terminal and the power supply node, respectively, and the second control submodule is coupled to the first power supply terminal, the power supply node and a first reference ground, respectively, and the power supply node is coupled to a voltage input terminal of a power supply module; the control subcircuit is configured to, when the control signal is a first signal, after cutting off the connection between the first power supply terminal and the power supply node through the first control submodule, enable the first power supply terminal to provide a working voltage to the power supply node through the second control submodule to restart the power supply module.

[0006] Optionally, the control subcircuit is further configured to enable the first power supply end to provide an operating voltage to the power supply node through the first control submodule when the control signal is a second signal.

[0007] Optionally, the preset voltage includes a first preset voltage and a second preset voltage, the first preset voltage is greater than the second preset voltage; the detection subcircuit is configured such that, when the voltage to be measured is greater than or equal to the first preset voltage or the voltage to be measured is less than or equal to the second preset voltage, the control signal output is a first signal; the detection subcircuit is also configured such that, when the voltage to be measured is greater than the second preset voltage and less than the first preset voltage, the control signal output is a second signal.

[0008] Optionally, the detection subcircuit includes a first comparator and a second comparator, the power supply terminal of the first comparator is connected to the second power supply terminal, and the second comparator is coupled to the second reference ground; the positive input terminal of the first comparator is connected to the first voltage terminal, and the negative input terminal of the first comparator is connected to the first preset voltage input terminal; the negative input terminal of the second comparator is connected to the first voltage terminal, and the positive input terminal of the first comparator is connected to the second preset voltage input terminal; the output terminals of the first comparator and the second comparator are both coupled to the first node.

[0009] Optionally, the second power supply terminal is coupled to the first power supply terminal; and / or the second reference ground is coupled to the first reference ground.

[0010] Optionally, a first diode is arranged between the output end of the first comparator and the first node, the anode of the first diode is coupled to the output end of the first comparator, and the cathode of the first diode is coupled to the first node; and / or, a second diode is arranged between the output end of the second comparator and the first node, the anode of the second diode is coupled to the output end of the second comparator, and the cathode of the second diode is coupled to the first node.

[0011] Optionally, at least one of the following is satisfied: the first control submodule includes a first transistor, the control end of the first transistor is coupled to the first node, and the first end and the second end of the first transistor are coupled to the first power supply end and the power supply node respectively; the second control submodule includes a second transistor, the control end of the second transistor is coupled to the power supply node, the first end and the second end of the second transistor are coupled to the first power supply end and the power supply node respectively, and the power supply node is also coupled to the first reference ground through a first resistor.

[0012] Optionally, the first transistor and the second transistor include PMOS.

[0013] Optionally, the power supply module includes an electrically connected power supply management module and a voltage generation module to be tested, the power supply management module is coupled to the power supply node, and the voltage generation module to be tested is coupled to the first voltage terminal; the power supply management module is used to control the restart of the voltage generation module to be tested when restarting, so as to update the voltage to be tested provided by the first voltage terminal.

[0014] Optionally, the voltage generation module to be tested includes a non-volatile memory and a voltage generating chip connected via a bus; the non-volatile memory stores information for updating the voltage to be tested, and the voltage generation module to be tested is configured to update the voltage to be tested according to the information in the non-volatile memory when the voltage generation module to be tested is in a restart state.

[0015] As a second aspect of an embodiment of the present disclosure, an embodiment of the present disclosure provides a power supply control method, the method comprising: extracting information stored in a non-volatile memory when a voltage generation module to be tested of a power supply of a power module is in a restart state; writing the information stored in the non-volatile memory into a voltage generating chip so that the voltage generating chip outputs a new voltage to be tested.

[0016] As a third aspect of an embodiment of the present disclosure, an embodiment of the present disclosure provides a controller, which is used to extract information stored in a non-volatile memory when a voltage generation module to be tested of a power supply module is in a restart state; and write the information stored in the non-volatile memory into a voltage generating chip so that the voltage generating chip outputs a new voltage to be tested.

[0017] As a fourth aspect of an embodiment of the present disclosure, an embodiment of the present disclosure provides a power supply control system, the system comprising the power supply control circuit described in any one of the first aspect and the controller described in the third aspect.

[0018] As the fifth aspect of the embodiment of the present disclosure, the embodiment of the present disclosure provides a display device, including a display panel, and also including the circuit of any one of the first aspect, or, also including the controller of the third aspect; or, also including the control system described in the fourth aspect.

[0019] The technical solution of the embodiment of the present disclosure provides a power control circuit, including a detection subcircuit and a control subcircuit, the detection subcircuit detects the VCOM voltage provided by the first voltage terminal, and outputs a control signal through a preset voltage and the VCOM voltage. The control subcircuit includes a first control submodule and a second control submodule. Under the action of the control signal, the control subcircuit can cut off the connection between the first power supply terminal and the power supply node through the first control submodule, so that the first power supply terminal provides a working voltage to the power supply node through the second control submodule to restart the power supply module. In this way, the automatic restart of the circuit can be achieved in the case of VCOM voltage deviation. After the restart, the first voltage terminal will provide a new VCOM voltage within the preset range, without the need for the user to return the product to the manufacturer for repair and adjustment, thereby improving the user experience.

[0020] 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

[0021] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts 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.

[0022] Figure 1 A schematic diagram of the circuit structure of a power supply control circuit provided in this embodiment;

[0023] Figure 2 A schematic diagram of the structure of a power module provided in this embodiment;

[0024] Figure 3 A schematic diagram showing the structure of a voltage generation module to be tested provided in this embodiment is shown;

[0025] Figure 4 A flow chart showing the steps of a power control method provided in an embodiment of the present application is shown.

[0026] Description of reference numerals:

[0027] A detection subcircuit 11 , a control subcircuit 12 , a first control submodule 121 , a second control submodule 122 , a power module 13 , a power management module 131 , and a voltage generation module 132 . DETAILED DESCRIPTION

[0028] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present disclosure. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0029] The transistors used in all embodiments of the present invention can be thin film transistors or field effect transistors or other devices with the same characteristics. According to the role in the circuit, the transistors used in the embodiments of the present invention are mainly switching transistors. Since the source and drain of the switching transistor used here are symmetrical, the source and drain are interchangeable. In the embodiment of the present invention, the source (source electrode) is called the first electrode, the drain (drain electrode) is called the second electrode, or the drain can be called the first electrode and the source is called the second electrode. According to the form in the accompanying drawings, the middle end of the transistor is specified 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 transistor used in the embodiment of the present invention can be a P-type switching transistor or an N-type transistor. The P-type switching transistor is turned on when the gate is at a low level and is turned off when the gate is at a high level; the N-type transistor is turned on when the gate is at a high level and is turned off when the gate is at a low level. In addition, multiple signals in each embodiment of the present invention correspond to a first potential and a second potential. The first potential and the second potential only represent two different potential state quantities of the signal, and do not represent that the first potential or the second potential in the full text has a specific value. In the embodiment of the present invention, the first potential is taken as an effective potential for description.

[0030] 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.

[0031] In order to solve the problem of screen flickering caused by VCOM voltage deviation and VCOM voltage probabilistic output abnormality, this embodiment provides a power control circuit, including a detection subcircuit and a control subcircuit, the detection subcircuit detects the VCOM voltage provided by the first voltage terminal, and outputs a control signal through a preset voltage and the VCOM voltage, the control subcircuit includes a first control submodule and a second control submodule, and the control subcircuit can cut off the connection between the first power supply terminal and the power supply node through the first control submodule under the action of the control signal, so that the first power supply terminal provides a working voltage to the power supply node through the second control submodule to restart the power supply module. In this way, the circuit can be automatically restarted in the case of VCOM voltage deviation, and the first voltage terminal will provide a new VCOM voltage within the preset range after restarting, without the user returning the product to the manufacturer for repair and adjustment, thereby improving the user experience.

[0032] Figure 1A schematic diagram of a power supply control circuit provided in this embodiment, referring to Figure 1 , a power control circuit includes: a detection subcircuit 11 and a control subcircuit 12, and the detection subcircuit 11 and the control subcircuit 12 are connected in series.

[0033] The detection subcircuit 11 is coupled to the first voltage terminal VCOM and the first node UO respectively. The detection subcircuit 11 is configured to output a control signal to the first node UO based on a preset voltage and a voltage to be measured VCOM. The voltage to be measured is the voltage provided by the first voltage terminal, i.e., VCOM (common electrode voltage).

[0034] In this embodiment, the preset voltage is an optimal VCOM range set according to the flickering mechanism of the display screen, and the specific value can be set according to the display requirements or standards.

[0035] The control signal may be a high level signal or a low level signal to change the on and off of the control subcircuit, and further change the output signal of the control subcircuit to restart the power module.

[0036] The control subcircuit 12 includes a first control submodule 121 and a second control submodule 122. The first control submodule 121 is coupled to the first node UO, the first power supply terminal VI N1 and the power supply node P respectively. The second control submodule 122 is coupled to the first power supply terminal VI N1, the power supply node P and the first reference ground respectively. The power supply node P is coupled to the voltage input terminal of the power module 13.

[0037] The control subcircuit 12 is configured to, when the control signal is the first signal, cut off the connection between the first power supply terminal VI N1 and the power supply node P through the first control submodule 121, so that the first power supply terminal VI N1 provides a working voltage to the power supply node P through the second control submodule 122 to restart the power supply module.

[0038] In this embodiment, the first signal is a signal that can change the conduction state of the first control submodule. For example, the first signal is a low-level signal. When the control signal is the first signal, the control signal changes the conduction state of the first control submodule 121, and the connection between the first power supply terminal VI N1 and the power supply node P is cut off. At the same time, the conduction state of the second control submodule 122 is also changed, so that the first power supply terminal VI N1 provides a working voltage to the power supply node P through the second control submodule 122 to restart the power module. In this way, under the effect of the change in the potential of the power node, the power module changes its working state from power supply to power off and then to power supply, thereby realizing automatic restart. After the power module is restarted, the voltage to be measured at the first voltage terminal will be updated and restored to the preset range, which can solve the problem of screen flickering caused by the VCOM voltage offset.

[0039] In the embodiment of the present application, the control subcircuit 12 is further configured to enable the first power supply terminal VI N1 to provide a working voltage to the power supply node P through the first control submodule 121 when the control signal is the second signal.

[0040] The first signal and the second signal are opposite signals, for example, the first signal is a low level signal, and the second signal is a high level signal.

[0041] When the control signal is the second signal, the first power supply terminal VI N1 provides the operating voltage to the power node P through the first control sub-module 121, so that the power control circuit can respond to different control signals, thereby increasing the flexibility of the control sub-circuit, allowing different power supply behaviors under different control signals, and improving the adaptability and control accuracy of the circuit.

[0042] In the embodiment of the present application, the preset voltage includes a first preset voltage u1 and a second preset voltage u2, and the first preset voltage u1 is greater than the second preset voltage u2.

[0043] The detection subcircuit 11 is configured to output a control signal of the first signal when the voltage to be measured VCOM is greater than or equal to the first preset voltage u1 or the voltage to be measured VCOM is less than or equal to the second preset voltage u2. The detection subcircuit is also configured to output a control signal of the second signal when the voltage to be measured VCOM is greater than the second preset voltage u2 and less than the first preset voltage u1.

[0044] That is, when the voltage value of VCOM exceeds the preset voltage range corresponding to u1 and u2, the control signal u0 output by the first node is the first signal. When the voltage value of VCOM is within the preset voltage range corresponding to u1 and u2, the control signal u0 output by the first node is the second signal. The values ​​of u1 and u2 can be obtained by voltage division at the power supply end.

[0045] By setting two preset voltages, the detection subcircuit 11 can output different control signals according to different voltage ranges, thereby increasing the circuit's ability to respond to voltage anomalies and achieving abnormal detection of the voltage to be measured VCOM.

[0046] In the embodiment of the present application, the detection subcircuit 11 includes a first comparator A1 and a second comparator A2, the power supply terminal of the first comparator A1 is connected to the second power supply terminal VI N2, and the second comparator A2 is coupled to the second reference ground; the positive input terminal of the first comparator A1 is connected to the first voltage terminal VCOM, and the negative input terminal of the first comparator A1 is connected to the first preset voltage input terminal; the negative input terminal of the second comparator A2 is connected to the first voltage terminal VCOM, and the positive input terminal of the first comparator A1 is connected to the second preset voltage input terminal; the output terminals of the first comparator A1 and the second comparator A2 are both coupled to the first node UO.

[0047] The first comparator A1 and the second comparator A2 of the present embodiment can form a window comparator, which detects the voltage to be measured by comparing the magnitude relationship between the voltage to be measured and the preset voltage, thereby improving the accuracy and response speed of voltage detection and ensuring the timely output of the control signal.

[0048] In the embodiment of the present application, the second power supply terminal VI N2 is coupled to the first power supply terminal VI N1; and / or the second reference ground is coupled to the first reference ground.

[0049] That is to say, the second power supply terminal VIN2 and the first power supply terminal VIN1 can be provided with voltage by the same power source, and the second reference ground and the first reference ground can be the same reference ground.

[0050] This can simplify circuit design, reduce external connections, and reduce cost and complexity.

[0051] In the embodiment of the present application, a first diode D1 is provided between the output end of the first comparator A1 and the first node, an anode of the first diode D1 is coupled to the output end of the first comparator A1, and a cathode of the first diode D1 is coupled to the first node; and / or,

[0052] A second diode D2 is disposed between the output terminal of the second comparator A2 and the first node. An anode of the second diode D2 is coupled to the output terminal of the second comparator A2, and a cathode of the second diode D2 is coupled to the first node.

[0053] The cathode of the first diode D1 and the cathode of the second diode D2 are also connected to the first node via the resistor R1, so as to limit the output current of the detection sub-circuit.

[0054] By arranging a diode between the output terminal of the comparator and the first node, the circuit can be protected from the influence of reverse current, thereby improving the stability and anti-interference ability of the circuit.

[0055] In the embodiment of the present application, at least one of the following is satisfied:

[0056] The first control submodule 121 includes a first transistor M1, the control end of the first transistor M1 is coupled to the first node, and the first end and the second end of the first transistor M1 are coupled to the first power supply end VI N1 and the power supply node respectively; the second control submodule 122 includes a second transistor M2, the control end of the second transistor M2 is coupled to the power supply node, the first end and the second end of the second transistor M2 are coupled to the first power supply end VI N1 and the power supply node respectively, and the power supply node is also coupled to the first reference ground through the first resistor R2.

[0057] The first control submodule and the second control submodule use transistors as switch elements, which can achieve precise control of the on and off of the power supply and improve the circuit response speed.

[0058] The control terminal of the first transistor M1 is coupled to the first node, so that the control signal of the first node can control the on and off of the first transistor, thereby changing the loop in the control subcircuit that provides the working voltage for the power supply node.

[0059] In the embodiment of the present application, the first transistor and the second transistor include PMOS, and based on the relationship between the gate-source voltage Vgs and the threshold voltage Vth of the PMOS, the control signal input to the control terminal of the PMOS is used to control the on or off state of the first transistor and the second transistor.

[0060] It should be noted that Figure 1 The exemplary structure of the detection subcircuit, the first control submodule and the second control submodule is shown. Those skilled in the art can understand that Figure 1 The schematic diagram of each module structure can be a simple structure of each module. Those skilled in the art can Figure 1 For example, the first control submodule can adopt a structure of more than two transistors connected in series, so that the first control submodule can also achieve the same function as the first control submodule when the structure is changed. Figure 1 The same function, therefore, the detection sub-circuit, the first control sub-module and the second control sub-module are not limited to Figure 1 Any structure shown may be used as long as the function can be achieved.

[0061] The circuit principle of this embodiment is described below:

[0062] like Figure 1 As shown, the first preset voltage u1 and the second preset voltage u2 are obtained by voltage division of the second power supply terminal VIN2. In the path formed by the second power supply terminal VIN2, the first amplifier A1, the second amplifier A2, and the second reference ground, the potential of the first amplifier A1 is greater than the potential of the second amplifier A2, and the voltage of u1 is greater than that of u2. When u2<VCOM<u1, both A1 and A2 output low level, so uo outputs low level. The Vgs of the PMOS tube M1 is less than Vth, M1 is turned on, the power node is high level, and the power module works normally.

[0063] When u1<VCOM, A1 outputs high level, A2 outputs low level, and the output voltage uo is output as high level, or when VCOM<u2, A1 outputs low level, A2 outputs high level, and uo is output as high level.

[0064] That is to say, when the display is operating normally without flickering, the voltage range of VCOM is u2<VCOM<u1, and when VCOM exceeds this range, uo is converted from a low level to a high level, Vgs=Vth of the first transistor M1, M1 is cut off, and the power module stops working. At this time, Vgs of the second transistor M2 is less than Vth, M2 is turned on, and the voltage of the power node P is pulled to a high potential again, driving the power module to restart and restart. When the power module is restarted, the voltage to be tested provided by the first voltage terminal will be updated, and the voltage to be tested will be updated and restored to the preset range, which can solve the flickering problem caused by the VCOM voltage offset. There is no need for users to return the product to the manufacturer for repair and adjustment, which improves the user experience.

[0065] Figure 2 A schematic diagram of a power module provided in this embodiment, referring to Figure 2 In an embodiment of the present application, the power supply module includes an electrically connected power supply management module 131 and a measured voltage generation module 132, the power supply management module 131 is coupled to the power supply node, and the measured voltage generation module 132 is coupled to the first voltage terminal; the power supply management module 131 is used to control the restart of the measured voltage generation module when restarting, so as to change the measured voltage provided by the first voltage terminal.

[0066] In one example, the power management module of this embodiment may include a PMIC (Power Management Integrated Circuit) power management integrated circuit chip, which can integrate multiple power management functions to meet the power requirements of various modules connected thereto.

[0067] The voltage generation module to be tested may include a PGIC (Programmable Gamma IC) chip, which may be used in a liquid crystal display to generate VCOM and Gamma voltages.

[0068] During the restart of the power module, the voltage generation module to be tested will also be restarted, and the code for generating VCOM in the voltage generation module to be tested will be rewritten, so that a new VCOM can be generated.

[0069] In the embodiment of the present application, Figure 3 A schematic diagram of the structure of a voltage generation module to be tested provided by this embodiment is shown, referring to Figure 3 The voltage generation module 132 to be tested includes a non-volatile memory EEPROM and a voltage generation chip PGIC connected via a bus; the non-volatile memory EEPROM stores information for updating the voltage to be tested, and the voltage generation module to be tested is configured to update the voltage to be tested according to the information in the non-volatile memory when the voltage generation module to be tested is in a restart state.

[0070] In one scenario, there is a probability that the PGIC chip outputs an abnormal VCOM voltage. Therefore, in order to solve the screen flickering problem caused by the probabilistic abnormal output of the VCOM voltage, the voltage generation module to be tested in this embodiment includes a non-volatile memory EEPROM, and the non-volatile memory stores information for updating the voltage to be tested. The voltage generation module to be tested is configured to update the voltage to be tested according to the information in the non-volatile memory when the voltage generation module to be tested is in a restart state. That is to say, the EEPROM stores the same code information for generating VCOM as the voltage generating chip (PGIC chip). The code information in the EEPROM and the PGIC chip is read when the voltage generation module to be tested is powered on. In the process of outputting VCOM, the code in the EEPROM is used to overwrite the code information in the PGIC chip. In this way, even if the code of the PG-IC monomer is wrong, the correct code in the EEPROM can overwrite it, thereby avoiding the screen flickering caused by the code error.

[0071] In one example, the voltage generating module to be tested may further include a timing control chip TCON IC (TimingController IC), which is used for timing control and signal conversion of image data, and has an integrated circuit for signal processing, timing control, and drive signal generation. The timing control chip is also connected to a non-volatile memory and a voltage generating chip through a bus. The volatile memory may also store code information of the TCON IC. When the voltage generating module to be tested is restarted, the TCON IC code information stored in the volatile memory is used to overwrite the code in the TCON IC chip, thereby improving the accuracy of the timing control and avoiding screen flashing caused by code errors and timing errors.

[0072] The above embodiment is a power control circuit provided by the present application, which can realize automatic restart of the circuit in the case of VCOM voltage deviation. After restarting, the first voltage terminal will provide a new VCOM voltage within a preset range, without the need for the user to return the product to the manufacturer for repair and adjustment, thereby improving the user experience. It can also avoid screen flashing caused by code errors.

[0073] The present application provides a power control method. Figure 4 A flowchart of a power control method provided by an embodiment of the present application is shown. The execution subject of the power control method of this embodiment may be an electronic device such as a controller that can implement the method. The method includes the following steps S301 to S302:

[0074] S301. When a voltage generation module to be tested of a power supply of a power module is in a restart state, extract information stored in a non-volatile memory.

[0075] S302, writing the information stored in the non-volatile memory into the voltage generating chip, so that the voltage generating chip outputs a new voltage to be tested.

[0076] like Figure 3 As shown, the non-volatile memory and the voltage generating chip PGIC chip are connected through a bus, and the non-volatile memory stores information for updating the voltage to be tested. When the voltage generating module to be tested is in a restart state, the controller extracts the information stored in the non-volatile memory and overwrites the code information in the PGIC chip with the code in the EEPROM. In this way, even if the PG-IC monomer code is wrong, the correct code in the EEPROM can overwrite it, and the correct code information can be written into the voltage generating chip, so that the voltage generating chip outputs a new voltage to be tested, avoiding screen flashing caused by code errors.

[0077] In one example, the voltage generation module to be tested also includes a timing control chip TCON IC, and the volatile memory may also store code information of the TCON IC. When the voltage generation module to be tested is restarted, the TCON IC code information stored in the volatile memory is used to overwrite the code in the TCON IC chip, thereby improving the accuracy of timing control and avoiding screen flashing caused by code errors and timing errors.

[0078] An embodiment of the present application provides a controller, which is used to extract information stored in a non-volatile memory when a voltage generation module to be tested of a power supply module is in a restart state; and write the information stored in the non-volatile memory into a voltage generating chip so that the voltage generating chip outputs a new voltage to be tested.

[0079] The controller may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by an integrated logic circuit of the hardware in the controller or an instruction in the form of software. The above controller may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a readily available programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application can be directly embodied as a hardware decoding processor to be executed, or the hardware and software modules in the decoding processor are combined and executed. The software module may be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0080] The controller provided in the embodiment of the present application and the power supply control method provided in the embodiment of the present application are based on the same application concept and have the same beneficial effects as the methods adopted, operated or implemented therein.

[0081] An embodiment of the present application provides a power control system, and the system includes the power control circuit and the controller provided in the above embodiment.

[0082] The controller provided in the embodiment of the present application and the power supply control method provided in the embodiment of the present application are based on the same application concept and have the same beneficial effects as the methods adopted, operated or implemented therein.

[0083] An embodiment of the present application provides a display device, including a display panel, and also including the circuit of any one of the embodiments, or also including the above-mentioned controller; or also including a control system.

[0084] The display device may 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.

[0085] 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 referred device or element 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.

[0086] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0087] In the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0088] In the present disclosure, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being “above”, “above”, and “above” a second feature includes that the first feature is 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 that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0089] The disclosure above provides many different embodiments or examples to implement 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, they are only examples, and the purpose is not to limit the present disclosure. In addition, the present disclosure can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0090] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A power control circuit, characterized in that: include: a detection subcircuit, coupled to the first voltage terminal and the first node respectively, and configured to output a control signal to the first node based on a preset voltage and a voltage to be measured, wherein the voltage to be measured is a voltage provided by the first voltage terminal; The control subcircuit comprises a first control submodule and a second control submodule, wherein the first control submodule is coupled to the first node, the first power supply terminal and the power supply node respectively, the second control submodule is coupled to the first power supply terminal, the power supply node and a first reference ground respectively, and the power supply node is coupled to the voltage input terminal of the power supply module; The control subcircuit is configured to, when the control signal is a first signal, cut off the connection between the first power supply end and the power supply node through the first control submodule, so that the first power supply end provides an operating voltage to the power supply node through the second control submodule to restart the power supply module.

2. The power control circuit according to claim 1, characterized in that: The control subcircuit is further configured to enable the first power supply end to provide an operating voltage to the power supply node through the first control submodule when the control signal is a second signal.

3. The power control circuit according to claim 1, characterized in that: The preset voltage includes a first preset voltage and a second preset voltage, and the first preset voltage is greater than the second preset voltage; The detection subcircuit is configured to output the control signal as a first signal when the voltage to be measured is greater than or equal to the first preset voltage or the voltage to be measured is less than or equal to the second preset voltage; The detection subcircuit is further configured to output the control signal as a second signal when the voltage to be measured is greater than the second preset voltage and less than the first preset voltage.

4. The power control circuit according to claim 3, characterized in that: The detection subcircuit comprises a first comparator and a second comparator, the power supply terminal of the first comparator is connected to the second power supply terminal, and the second comparator is coupled to the second reference ground; The positive input terminal of the first comparator is connected to the first voltage terminal, and the negative input terminal of the first comparator is connected to the first preset voltage input terminal; The negative input terminal of the second comparator is connected to the first voltage terminal, and the positive input terminal of the first comparator is connected to the second preset voltage input terminal; Output terminals of the first comparator and the second comparator are both coupled to the first node.

5. The power control circuit according to claim 4, characterized in that: The second power supply terminal is coupled to the first power supply terminal; and / or, The second reference ground is coupled to the first reference ground.

6. The power control circuit according to claim 4, characterized in that: A first diode is provided between the output terminal of the first comparator and the first node, an anode of the first diode is coupled to the output terminal of the first comparator, and a cathode of the first diode is coupled to the first node; and / or, A second diode is provided between the output terminal of the second comparator and the first node, an anode of the second diode is coupled to the output terminal of the second comparator, and a cathode of the second diode is coupled to the first node.

7. The power control circuit according to claim 1, characterized in that: Satisfy at least one of the following: The first control submodule comprises a first transistor, a control terminal of the first transistor is coupled to the first node, and a first terminal and a second terminal of the first transistor are coupled to a first power supply terminal and the power supply node respectively; The second control submodule includes a second transistor, a control end of the second transistor is coupled to the power supply node, a first end and a second end of the second transistor are coupled to the first power supply end and the power supply node respectively, and the power supply node is also coupled to the first reference ground through a first resistor.

8. The power control circuit according to claim 7, characterized in that: The first transistor and the second transistor include PMOS.

9. The power control circuit according to claim 1, characterized in that: The power supply module comprises a power supply management module and a voltage generation module to be tested which are electrically connected, the power supply management module is coupled to the power supply node, and the voltage generation module to be tested is coupled to the first voltage terminal; The power management module is used to control the voltage-to-be-tested generating module to restart when restarting, so as to update the voltage to be tested provided by the first voltage terminal.

10. The power control circuit according to claim 9, characterized in that: The voltage generation module to be tested includes a non-volatile memory and a voltage generation chip connected via a bus; The non-volatile memory stores information for updating the voltage to be measured, and the voltage to be measured generating module is configured to update the voltage to be measured according to the information in the non-volatile memory when the voltage to be measured generating module is in a restart state.

11. A power control method, characterized in that: The method comprises: When the voltage generation module to be tested of the power supply of the power module is in a restart state, extracting information stored in the non-volatile memory; The information stored in the non-volatile memory is written into the voltage generating chip, so that the voltage generating chip outputs a new voltage to be tested.

12. A controller, characterized in that: The controller is used to extract information stored in the non-volatile memory when the voltage generation module to be tested of the power supply of the power module is in a restart state; The information stored in the non-volatile memory is written into the voltage generating chip, so that the voltage generating chip outputs a new voltage to be tested.

13. A power supply control system, characterized in that: The system comprises the power control circuit according to any one of claims 1 to 10 and the controller according to claim 12.

14. A display device, characterized in that: It includes a display panel and the circuit of any one of claims 1 to 10, or it also includes the controller of claim 12; or it also includes the control system described in claim 13.

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