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

Abstract

Embodiments of the present application provide a power supply control circuit, method, system, controller and display device. Relate to the field of display technology, the power supply control circuit 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-measured voltage, the to-be-measured voltage being a voltage provided by the first voltage end; a control sub-circuit, comprising a first control sub-module and a second control sub-module, the first control sub-module being respectively coupled with the first node, a first power supply end and a power supply node, and the second control sub-module being respectively coupled with the first power supply end, the power supply node and a first reference ground, the power supply node being coupled with a voltage input end of a power supply module; the control sub-circuit is configured to restart the power supply module in the case that the control signal is a first signal. The present application can solve the problem of flashing screen in the prior art.

Description

TECHNICAL FIELD

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

[0002] VCOM (common electrode voltage) is the reference voltage for liquid crystal molecule deflection, and has a direct impact on liquid crystal display effect. In a liquid crystal display screen, instability of the VCOM voltage can cause uneven pixel light intensity, thereby generating a screen flicker phenomenon.

[0003] In the prior art, adjustment of the VCOM voltage is usually performed once before the liquid crystal display screen is shipped, so as to reduce the impact of the VCOM voltage on backlight flicker in the liquid crystal display screen. However, due to process differences and changes in the use environment, this static adjustment method often cannot adapt to all use scenarios, resulting in that the VCOM voltage offset problem still exists, and after the flicker problem occurs, the user still needs to return the product to the manufacturer for maintenance and adjustment, which seriously affects the user experience. SUMMARY

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

[0005] As a first aspect of the embodiments of the present disclosure, a power control circuit is provided, comprising: a detection sub-circuit coupled with a first voltage terminal and a first node respectively, configured to output a control signal to the first node based on a preset voltage and a to-be-measured voltage, the to-be-measured voltage being a voltage provided by the first voltage terminal; a control sub-circuit comprising a first control sub-module and a second control sub-module, the first control sub-module being coupled with the first node, a first power supply terminal and a power supply node respectively, the second control sub-module being coupled with the first power supply terminal, the power supply node and a first reference ground respectively, the power supply node being coupled with a voltage input terminal of a power supply module; the control sub-circuit is configured to, in a case that the control signal is a first signal, cut off the connection between the first power supply terminal and the power supply node through the first control sub-module, and then make the first power supply terminal provide working voltage to the power supply node through the second control sub-module, so as to restart the power supply module.

[0006] Optionally, the control sub-circuit is further configured to, in a case that the control signal is a second signal, make the first power supply terminal provide working voltage to the power supply node through the first control sub-module.

[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 sub-circuit is configured to output the control signal as a first signal in a case that the to-be-detected voltage is greater than or equal to the first preset voltage or the to-be-detected voltage is less than or equal to the second preset voltage; the detection sub-circuit is further configured to output the control signal as a second signal in a case that the to-be-detected voltage is greater than the second preset voltage and less than the first preset voltage.

[0008] Optionally, the detection sub-circuit includes a first comparator and a second comparator, a power supply end of the first comparator is connected to a second power supply end, and the second comparator is coupled with a second reference ground; a positive input end of the first comparator is connected to the first voltage end, and a negative input end of the first comparator is connected to a first preset voltage input end; a negative input end of the second comparator is connected to the first voltage end, and a positive input end of the first comparator is connected to a second preset voltage input end; output ends of the first comparator and the second comparator are both coupled with the first node.

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

[0010] Optionally, a first diode is arranged between the output end of the first comparator and the first node, a positive electrode of the first diode is coupled with the output end of the first comparator, and a negative electrode of the first diode is coupled with the first node; and / or, a second diode is arranged between the output end of the second comparator and the first node, a positive electrode of the second diode is coupled with the output end of the second comparator, and a negative electrode of the second diode is coupled with the first node.

[0011] Optionally, at least one of the following is met: the first control sub-module includes a first transistor, a control end of the first transistor is coupled with the first node, and a first end and a second end of the first transistor are respectively coupled with a first power supply end and the power supply node; the second control sub-module includes a second transistor, a control end of the second transistor is coupled with the power supply node, a first end and a second end of the second transistor are respectively coupled with the first power supply end and the power supply node, and the power supply node is further coupled with 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 comprises an electrically connected power management module and a to-be-tested voltage generation module, the power management module is coupled with the power supply node, and the to-be-tested voltage generation module is coupled with the first voltage terminal; the power management module is configured to control the to-be-tested voltage generation module to restart at the time of restart, so as to update the to-be-tested voltage provided by the first voltage terminal.

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

[0015] As a second aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a power supply control method, which comprises: in the case that a to-be-tested voltage generation module of a power supply module power supply is in a restart state, extracting information stored in a non-volatile memory; writing the information stored in the non-volatile memory into a voltage generation chip, so that the voltage generation chip outputs a new to-be-tested voltage.

[0016] As a third aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a controller, which is configured to, in the case that a to-be-tested voltage generation module of a power supply module power supply is in a restart state, extract information stored in a non-volatile memory; write the information stored in the non-volatile memory into a voltage generation chip, so that the voltage generation chip outputs a new to-be-tested voltage.

[0017] As a fourth aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a power supply control system, which comprises the power supply control circuit of any one of the first aspect and the controller of the third aspect.

[0018] As a fifth aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a display device, which comprises a display panel, and further comprises the circuit of any one of the first aspect, or further comprises the controller of the third aspect, or further comprises the control system of the fourth aspect.

[0019] The technical scheme of the embodiment of the present disclosure provides a power supply control circuit, which comprises a detection sub-circuit and a control sub-circuit. The detection sub-circuit is used to detect a VCOM voltage provided by a first voltage terminal. A control signal is output by a preset voltage and the VCOM voltage. The control sub-circuit comprises a first control sub-module and a second control sub-module. Under the action of the control signal, the control sub-circuit can cut off the connection between the first power supply terminal and the power supply node through the first control sub-module, and then make the first power supply terminal provide working voltage to the power supply node through the second control sub-module, so as to restart the power supply module. In this way, the automatic restart of the circuit can be realized in the case of VCOM voltage offset. The first voltage terminal will provide new VCOM voltage within the preset range after the restart, without the need for the user to return the product to the factory for maintenance and adjustment, thereby improving the user experience.

[0020] The above summary is merely intended to illustrate the present description and is not intended to limit 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 apparent from the drawings and the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0021] In the drawings, like reference numerals refer to same or similar functionalities throughout the several views. The drawings are not necessarily to scale. It is to be understood that the drawings only depict several embodiments in accordance with the present disclosure and should not be considered to be limiting thereof.

[0022] Figure 1 A circuit structure schematic diagram of a power supply control circuit provided by the present embodiment is shown in the figure;

[0023] Figure 2 A structure schematic diagram of a power supply module provided by the present embodiment is shown in the figure;

[0024] Figure 3 A structure schematic diagram of a to-be-measured voltage generation module provided by the present embodiment is shown in the figure;

[0025] Figure 4 A step flowchart of a power supply control method provided by the present embodiment is shown in the figure.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] Detection sub-circuit 11, control sub-circuit 12, first control sub-module 121, second control sub-module 122, power supply module 13, power supply management module 131, to-be-measured voltage generation module 132. DETAILED DESCRIPTION

[0028] In the following, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present disclosure. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0029] The transistor used in all embodiments of the present application can be a thin film transistor or a field effect transistor or other devices with the same characteristics. The transistor used in the embodiments of the present application is mainly a switching transistor according to its role in the circuit. Since the source and drain of the switching transistor used here are symmetrical, the source and drain can be interchangeable. In the embodiments of the present application, the source (source electrode) is referred to as the first pole, and the drain (drain electrode) is referred to as the second pole, or the drain can be referred to as the first pole and the source as the second pole. According to the form in the 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 transistor used in the embodiments of the present application 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, each of the plurality of signals in the embodiments of the present application corresponds to a first potential and a second potential. The first potential and the second potential only represent two different potential states of the signal, and do not represent that the first potential or the second potential has a specific value throughout the text. The first potential is taken as an example in the embodiments of the present application.

[0030] Among them, coupling can include: direct physical contact between two ends or indirect connection between two ends (such as connection between two ends through a signal line). The embodiments of the present application do not limit the coupling mode between the two ends.

[0031] In order to solve the problem of flash screen caused by VCOM voltage offset and VCOM voltage probability output abnormality, the embodiment provides a power supply control circuit, which comprises a detection sub-circuit and a control sub-circuit. The VCOM voltage provided by the first voltage end is detected by the detection sub-circuit, and the VCOM voltage output control signal is controlled by the preset voltage. The control sub-circuit comprises a first control sub-module and a second control sub-module. Under the action of the control signal, the control sub-circuit can cut off the connection between the first power supply end and the power supply node, and then make the first power supply end provide working voltage to the power supply node through the second control sub-module, so as to restart the power supply module. In this way, the automatic restart of the circuit can be realized in the case of VCOM voltage offset. After restarting, the first voltage end will provide a new VCOM voltage within the preset range, without the need for users to return the product to the factory for maintenance and adjustment, thereby improving the user experience.

[0032] Figure 1A circuit structure schematic diagram of a power supply control circuit is provided for the embodiment, refer to Figure 1 A power supply control circuit, comprising: a detection sub-circuit 11 and a control sub-circuit 12, the detection sub-circuit 11 and the control sub-circuit 12 are connected in series.

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

[0034] The preset voltage in the embodiment is the best VCOM range set according to the display screen flickering mechanism, and the specific value can be set according to the display requirements or standards.

[0035] The control signal can be a high-level signal or a low-level signal, so as to change the on and off of the control sub-circuit, and then the output signal of the control sub-circuit can be changed, so as to restart the power module.

[0036] The control sub-circuit 12 comprises a first control sub-module 121 and a second control sub-module 122, the first control sub-module 121 is coupled with the first node UO, the first power supply terminal VIN1 and the power supply node P respectively, the second control sub-module 122 is coupled with the first power supply terminal VIN1, the power supply node P and the first reference ground respectively, and the power supply node P is coupled with the voltage input terminal of the power module 13.

[0037] The control sub-circuit 12 is configured to, in the case that the control signal is a first signal, cut off the connection between the first power supply terminal VIN1 and the power supply node P through the first control sub-module 121, and then make the first power supply terminal VIN1 provide working voltage to the power supply node P through the second control sub-module 122, so as to restart the power module.

[0038] In the embodiment, the first signal is a signal capable of changing the on state of the first control sub-module, for example, the first signal is a low-level signal, when the control signal is the first signal, the control signal changes the on state of the first control sub-module 121, the connection between the first power supply terminal VIN1 and the power supply node P is cut off, and at the same time, the on state of the second control sub-module 122 is also changed, so that the first power supply terminal VIN1 provides working voltage to the power supply node P through the second control sub-module 122, so as to restart the power module. In this way, under the action of the change of the power supply node potential, the working state of the power module changes from power supply to power off and then to power supply, so as to realize automatic restart. After the power module is restarted, the to-be-measured voltage of the first voltage terminal will be updated and restored to the preset range, so as to solve the flickering problem caused by the VCOM voltage offset.

[0039] In the embodiment of the present application, the control sub-circuit 12 is further configured to, in the case that the control signal is the second signal, cause the first power supply end VIN1 to provide the working voltage to the power supply node P through the first control submodule 121.

[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] In the case that the control signal is the second signal, the first power supply end VIN1 provides the working voltage to the power supply node P through the first control submodule 121, which can realize the response of the power supply control circuit to different control signals, increase the flexibility of the control sub-circuit, allow different power supply behaviors under different control signals, and improve 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 sub-circuit 11 is configured to output the first signal when the to-be-measured voltage VCOM is greater than or equal to the first preset voltage u1 or the to-be-measured voltage VCOM is less than or equal to the second preset voltage u2. The detection sub-circuit is further configured to output the second signal when the to-be-measured voltage 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 of the power supply end.

[0045] By setting two preset voltages, the detection sub-circuit 11 can output different control signals according to different voltage ranges, which increases the response capability of the circuit to voltage abnormalities and realizes the abnormal detection of the to-be-measured voltage VCOM.

[0046] In the embodiment of the present application, the detection sub-circuit 11 includes a first comparator A1 and a second comparator A2. The power supply end of the first comparator A1 is connected to the second power supply end VIN2, and the second comparator A2 is coupled with the second reference ground. The positive input end of the first comparator A1 is connected to the first voltage end VCOM, and the negative input end of the first comparator A1 is connected to the first preset voltage input end. The negative input end of the second comparator A2 is connected to the first voltage end VCOM, and the positive input end of the first comparator A1 is connected to the second preset voltage input end. The output ends of the first comparator A1 and the second comparator A2 are both coupled with the first node UO.

[0047] The first comparator A1 and the second comparator A2 of the embodiment can form a window comparator, and the detection of the to-be-detected voltage is realized by comparing the size relationship between the to-be-detected voltage 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 application, the second power supply terminal VIN2 is coupled with the first power supply terminal VIN1; and / or, the second reference ground is coupled with the first reference ground.

[0049] That is, the second power supply terminal VIN2 and the first power supply terminal VIN1 can provide voltage through the same power supply, and the second reference ground and the first reference ground can be the same reference ground.

[0050] In this way, the circuit design can be simplified, external connections can be reduced, and cost and complexity can be reduced.

[0051] In the embodiment of the application, a first diode D1 is arranged between the output terminal of the first comparator A1 and the first node, the anode of the first diode D1 is coupled with the output terminal of the first comparator A1, and the cathode of the first diode D1 is coupled with the first node; and / or,

[0052] A second diode D2 is arranged between the output terminal of the second comparator A2 and the first node, the anode of the second diode D2 is coupled with the output terminal of the second comparator A2, and the cathode of the second diode D2 is coupled with the first node.

[0053] The cathode of the first diode D1 and the cathode of the second diode D2 are further connected to the first node through the resistor R1, and the limitation on the output current of the detection subcircuit can be realized.

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

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

[0056] The first control sub-module 121 includes a first transistor M1, the control terminal of the first transistor M1 is coupled with the first node, and the first end and the second end of the first transistor M1 are respectively coupled with the first power supply terminal VIN1 and the power supply node; the second control sub-module 122 includes a second transistor M2, the control terminal of the second transistor M2 is coupled with the power supply node, the first end and the second end of the second transistor M2 are respectively coupled with the first power supply terminal VIN1 and the power supply node, and the power supply node is further coupled with the first reference ground through the first resistor R2.

[0057] The first control sub-module and the second control sub-module use transistors as switching elements, so that the power supply can be accurately controlled, and the response speed of the circuit is improved.

[0058] The control terminal of the first transistor M1 is coupled with the first node, so that the control signal of the first node can control the turn-on and turn-off of the first transistor, and further change the loop in the control sub-circuit for providing working voltage for the power supply node.

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

[0060] It should be noted that, Figure 1 The exemplary structure of the detection sub-circuit, the first control sub-module and the second control sub-module is shown. Those skilled in the art can understand that, Figure 1 The structure of each module shown can be a simple structure of each module, and those skilled in the art can add devices to the structure of each module to realize the functions of each module on the basis of the conventional technology in the art. Figure 1 For example, the first control sub-module can use a structure of two or more transistors in series, so that the first control sub-module can also realize the same functions as Figure 1 the first control sub-module and the second control sub-module in the case of structural change, and therefore, the detection sub-circuit, the first control sub-module and the second control sub-module are not limited to Figure 1 the structures shown, as long as the functions thereof can be realized.

[0061] Next, the circuit principle of the embodiment is described.

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

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

[0064] That is, when the display normally operates without flashing screen, the voltage range of VCOM is u2VCOMu1, and when VCOM exceeds the range, uo is converted from low level to high level, Vgs of the first transistor M1 = Vth, M1 is cut off, the power module stops working, and at this time Vgs of the second transistor M2 is less than Vth, M2 is turned on, the voltage of the power supply node P is pulled to high potential again, and the power module starts to work again to realize reboot. When the power module reboots, the voltage to be measured provided by the first voltage terminal will be updated, the voltage to be measured will be updated, and will be restored to the preset range, so that the flashing screen problem caused by the voltage offset of VCOM can be solved. Without the need for users to return the product to the factory for maintenance and adjustment, the user experience is improved.

[0065] Figure 2 A structural schematic diagram of a power module is provided for the embodiment, referring to Figure 2 In the embodiment, the power module includes a power management module 131 and a voltage to be measured generation module 132 connected by electricity, the power management module 131 is coupled with a power supply node, and the voltage to be measured generation module 132 is coupled with a first voltage terminal; the power management module 131 is used to control the voltage to be measured generation module to restart to provide the voltage to be measured by the first voltage terminal when restarting.

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

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

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

[0069] In the embodiment, Figure 3 A structural schematic diagram of a voltage to be measured generation module is shown, referring to Figure 3 The voltage to be measured generation module 132 includes a non-volatile memory EEPROM and a voltage generating chip PGIC connected by a bus; the non-volatile memory EEPROM stores information for updating the voltage to be measured, and the voltage to be measured generation 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 generation module is in a restart state.

[0070] In one scenario, the PGIC chip may output an abnormal VCOM voltage. Therefore, to address the screen flickering issue caused by the probabilistic abnormal VCOM voltage output, the voltage under test (DUT) generation module in this embodiment includes a non-volatile memory (EEPROM). The EEPROM stores information for updating the DUT. The DUT generation module is configured to update the DUT based on the information in the EEPROM when it is in a restart state. In other words, the EEPROM stores the same code information used to generate VCOM as the voltage generation chip (PGIC chip). When the DUT generation module is powered on, the code information in the EEPROM and the PGIC chip is read. During the VCOM output process, the code in the EEPROM overwrites the code information in the PGIC chip. Thus, even if the PGIC chip has an individual code error, the correct code in the EEPROM can overwrite it, avoiding screen flickering caused by code errors.

[0071] In one example, the voltage under test generation module may also include a timing controller IC (TCON IC) for timing control and signal conversion of image data. It is an integrated circuit with signal processing, timing control and drive signal generation. The timing controller IC is also connected to the non-volatile memory and the voltage generation chip via a bus. The volatile memory may also store the code information of the TCON IC. When the voltage under test generation module restarts, the code information of the TCON IC 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 flickering caused by code errors or timing errors.

[0072] The above embodiment is the power control circuit provided in this application, which can automatically restart the circuit when the VCOM voltage deviates. After restarting, the first voltage terminal will provide a new VCOM voltage within the preset range, eliminating the need for the user to return the product to the manufacturer for repair and adjustment, thus improving the user experience. It can also avoid screen flickering caused by code errors.

[0073] This application provides a power control method. Figure 4 This illustration shows a flowchart of a power control method according to an embodiment of this application. The executing entity of the power control method in this embodiment can 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 the power supply module's voltage generation module is in a restart state, extract the information stored in the non-volatile memory.

[0075] S302. Write the information stored in the non-volatile memory into the voltage generation chip so that the voltage generation chip outputs a new voltage to be measured.

[0076] like Figure 3 As shown, the non-volatile memory and the voltage generation chip PGIC are connected via a bus. The non-volatile memory stores information for updating the voltage to be measured. When the voltage generation module is in a restart state, the controller retrieves 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 code of the PG-IC is incorrect, the correct code in the EEPROM can overwrite it and write the correct code information into the voltage generation chip so that the voltage generation chip outputs a new voltage to be measured, avoiding screen flickering caused by code errors.

[0077] In one example, the voltage under test generation module also includes a timing control chip TCON IC. The volatile memory can also store the code information of the TCON IC. When the voltage under test generation module restarts, the code information of the TCON IC 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 flickering caused by code errors or timing errors.

[0078] This application provides a controller that, when the voltage generation module of the power supply is in a restart state, extracts information stored in a non-volatile memory and writes the information stored in the non-volatile memory into a voltage generation chip, so that the voltage generation chip outputs a new voltage to be measured.

[0079] The controller may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed through integrated logic circuits in the controller's hardware or through software instructions. The controller can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it can also be a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), an Off-the-shelf Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory; the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method.

[0080] The controller provided in this application embodiment and the power control method provided in this application embodiment are based on the same application concept and have the same beneficial effects as the methods they adopt, operate or implement.

[0081] This application provides a power control system, which includes the power control circuit and controller provided in the above embodiments.

[0082] The controller provided in this application embodiment and the power control method provided in this application embodiment are based on the same application concept and have the same beneficial effects as the methods they adopt, operate or implement.

[0083] This application provides a display device, including a display panel, and further including any of the circuits described in this embodiment, or, further including the controller described above; or, further including a control system.

[0084] The display device can be any product or component with a display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator.

[0085] In the description of this specification, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0086] 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 indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, "multiple" means two or more, unless otherwise explicitly specified.

[0087] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0088] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0089] The foregoing disclosure provides many different implementations or examples for carrying out different structures of this disclosure. To simplify this disclosure, the components and arrangements of specific examples are described above. Of course, these are merely examples and are not intended to limit this disclosure. Furthermore, reference numerals and / or reference letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0090] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this disclosure, and these should all be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A power supply control circuit, characterized in that, include: The detection sub-circuit is coupled to the first voltage terminal and the first node respectively, and is configured to output a control signal to the first node based on a preset voltage and a voltage to be measured. The voltage to be measured is the common electrode voltage provided by the first voltage terminal, and the preset voltage has a preset voltage range. The control sub-circuit includes a first control sub-module and a second control sub-module. The first control sub-module is coupled to the first node, the first power supply terminal, and the power supply node, respectively. The second control sub-module is coupled to the first power supply terminal, the power supply node, and the first reference ground, respectively. The power supply node is coupled to the voltage input terminal of the power supply module. The control sub-circuit is configured to, when the control signal is the first signal, disconnect the connection between the first power supply terminal and the power node through the first control sub-module, so that the first power supply terminal provides operating voltage to the power node through the second control sub-module to restart the power module; wherein, when the voltage to be measured exceeds the voltage range of the preset voltage, the control signal is the first signal.

2. The power control circuit according to claim 1, characterized in that, The control sub-circuit is also configured to, when the control signal is the second signal, cause the first power supply terminal to provide operating voltage to the power node through the first control sub-module.

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, wherein the first preset voltage is greater than the second preset voltage; The detection sub-circuit is configured such that, when the voltage to be measured is greater than or equal to the first preset voltage or when the voltage to be measured is less than or equal to the second preset voltage, the output control signal is a first signal. The detection sub-circuit is further configured to output 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 sub-circuit 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 a 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 outputs of both the first comparator and the second comparator are 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 disposed between the output terminal of the first comparator and the first node, the anode of the first diode being coupled to the output terminal of the first comparator, and the cathode of the first diode being coupled to the first node; and / or, A second diode is provided between the output terminal of the second comparator and the first node. The positive terminal of the second diode is coupled to the output terminal of the second comparator, and the negative terminal 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 includes a first transistor, the control terminal of the first transistor is coupled to the first node, and the first terminal and the second terminal of the first transistor are coupled to the first power supply terminal and the power supply node, respectively. The second control submodule includes a second transistor, the control terminal of which is coupled to the power node, and the first and second terminals of which are coupled to the first power supply terminal and the power node, respectively. The power 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 module includes a power management module and a voltage under test generation module that are electrically connected. The power management module is coupled to the power node, and the voltage under test generation module is coupled to the first voltage terminal. The power management module is used to control the voltage under test generation module to restart during a restart, so as to update the voltage under test provided by the first voltage terminal.

10. The power control circuit according to claim 9, characterized in that, The voltage generation module includes a non-volatile memory and a voltage generation chip connected via a bus. The non-volatile memory stores information for updating the voltage under test. The voltage under test generation module is configured to update the voltage under test based on the information in the non-volatile memory when the voltage under test generation module is in a restart state.

11. A power supply control method, characterized in that, The method includes: When the voltage generation module of the power supply module is in a restart state, the information stored in the non-volatile memory is extracted; the power supply module is the power supply module in the power control circuit according to any one of claims 1-10; Information stored in non-volatile memory is written into a voltage generating chip, so that the voltage generating chip outputs a new voltage to be measured.

12. A controller, characterized in that, The controller is used to extract information stored in the non-volatile memory when the voltage generation module of the power module is in a restart state; the power module is the power module in the power control circuit according to any one of claims 1-10. Information stored in non-volatile memory is written into a voltage generating chip, so that the voltage generating chip outputs a new voltage to be measured.

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

14. A display device, characterized in that, It includes a display panel, the circuitry of any one of claims 1-10, or the controller of claim 12; or the control system of claim 13.

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