Backlight control method, system, terminal device and storage medium

Abstract

This application discloses a backlight control method, system, terminal device, and storage medium, which are applied to a backlight control system. The backlight control system includes a driver chip and a mini-LED integrated with a temperature detection module. The backlight control method includes: obtaining a first temperature value of the driver chip obtained by the temperature detection module performing temperature detection on the driver chip; comparing the first temperature value with a preset first temperature threshold; if the first temperature value is higher than the first temperature threshold, controlling the driver chip to reduce the drive current output by the driver chip to the mini-LED to a first preset current value, the first preset current value corresponding to the first temperature threshold. The technical solution of this application achieves the effect of reducing the production cost of AM Mini-LEDs while ensuring the reliability of AM Mini-LEDs.

Description

Technical Field

[0001] The present application relates to the technical field of electronic products, and in particular to a backlight control method, system, terminal device, and storage medium. Background Art

[0002] Mini-LED (Mini-light emitting diode) backlight technology is divided into two mainstream technologies: AM Mini-LED (active matrix drive Mini-LED) and PM Mini-LED (passive matrix drive Mini-LED). In actual applications, AM Mini-LED has a higher LED partitioning, which can provide users with a better viewing experience and is widely praised.

[0003] However, AM Mini-LED driver chips are placed inside the backlight module, which provides poor heat dissipation. Furthermore, the package size and specifications of AM Mini-LED driver chips are relatively small. Therefore, to ensure AM Mini-LED reliability, AM Mini-LED manufacturers need to derate the driver chips. This is to keep the stress (electrical and temperature stress) experienced by the components below their rated values, thereby slowing device parameter degradation and extending their operating life. However, this requires more driver chips to drive AM Mini-LEDs, resulting in high production costs. Summary of the Invention

[0004] The main purpose of this application is to provide a backlight control method, system, terminal device and storage medium, aiming to reduce the production cost of AM Mini-LED while ensuring the reliability of AM Mini-LED.

[0005] To achieve the above-mentioned object, the present application provides a backlight control method, which is applied to a backlight control system, wherein the backlight control system includes a driver chip integrated with a temperature detection module and a mini light-emitting diode;

[0006] The backlight control method comprises:

[0007] Acquire a first temperature value of the driver chip obtained by the temperature detection module performing temperature detection on the driver chip;

[0008] comparing the first temperature value with a preset first temperature threshold;

[0009] If it is compared that the first temperature value is higher than the first temperature threshold, the driving current output by the driving chip to the mini light emitting diode is controlled to be reduced to a first preset current value, and the first preset current value corresponds to the first temperature threshold.

[0010] Optionally, the backlight control system further comprises a micro control unit, and the micro control unit is connected to a driving chipset formed by a plurality of driving chips communicating with each other in series;

[0011] After the step of obtaining a first temperature value of the driver chip obtained by the temperature detection module performing temperature detection on the driver chip, the method further includes:

[0012] comparing the first temperature values ​​of the driver chips in the driver chipset to determine the maximum temperature value in the driver chipset;

[0013] The maximum temperature value is transmitted to the microcontroller unit so that the microcontroller unit compares the maximum temperature value with a preset system temperature threshold. If the maximum temperature value is higher than the system temperature threshold, the driving current output by the driver chip corresponding to the maximum temperature value to the mini light-emitting diode is controlled to be reduced to a system preset current value, and the system preset current value corresponds to the system temperature threshold.

[0014] Optionally, before the step of comparing the first temperature value with a preset first temperature threshold, the method further includes:

[0015] Receive the temperature threshold and threshold current configuration data sent by the micro control unit.

[0016] Optionally, after the step of controlling the driving current output by the driving chip to the mini light emitting diode to be reduced to a first preset current value, the method further includes:

[0017] Acquire a second temperature value of the driver chip obtained by the temperature detection module performing temperature detection on the driver chip;

[0018] If the second temperature value is compared to be higher than a preset second temperature threshold, the driving current output by the driver chip to the mini light-emitting diode is controlled to be reduced to a second preset current value, wherein the second temperature threshold is higher than the first temperature threshold, the second preset current value corresponds to the second temperature threshold, and the second preset current value is less than the first preset current value.

[0019] Optionally, after the step of controlling the driving current output by the driving chip to the mini light emitting diode to be reduced to a second preset current value, the method further includes:

[0020] Acquiring a third temperature value of the driver chip obtained by the temperature detection module performing temperature detection on the driver chip;

[0021] If it is compared that the third temperature value is higher than a preset third temperature threshold, the driving current output by the driver chip to the mini light-emitting diode is controlled to be reduced to a third preset current value, and / or some or all channels of the driver chip outputting the driving current to the mini light-emitting diode are closed, wherein the third temperature threshold is higher than the second temperature threshold, the third preset current value corresponds to the third temperature threshold, and the third preset current value is less than the second preset current value.

[0022] The present application provides a backlight control method, which is also applied to a backlight control system. The backlight control system includes a microcontroller unit and multiple driver chips, each of which is integrated with a temperature detection module. The driver chips form multiple driver chip groups, and each of the driver chip groups is connected to the microcontroller unit.

[0023] The backlight control method further includes:

[0024] receiving a maximum temperature value within the driver chipset, wherein the maximum temperature value is determined by comparing first temperature values ​​of respective driver chips within the driver chipset, and the first temperature value is determined by the temperature detection module detecting the temperature of the driver chips;

[0025] The maximum temperature value is compared with a preset system temperature threshold. If the maximum temperature value is higher than the system temperature threshold, the driving current output by the driver chip corresponding to the maximum temperature value to the mini light-emitting diode is controlled to be reduced to a system preset current value, and the system preset current value corresponds to the system temperature threshold.

[0026] Optionally, the method further includes:

[0027] The temperature threshold and threshold current configuration data are sent to each of the driver chips.

[0028] In addition, to achieve the above-mentioned purpose, the present application also provides a backlight control system, which includes a driver chip integrated with a temperature detection module and a mini light-emitting diode;

[0029] The driver chip is configured to obtain a first temperature value of the driver chip obtained by the temperature detection module performing temperature detection on the driver chip; compare the first temperature value with a preset first temperature threshold; and, if the first temperature value is higher than the first temperature threshold, control the driver chip to reduce the driving current output by the driver chip to the mini light-emitting diode to a first preset current value, where the first preset current value corresponds to the first temperature threshold;

[0030] The backlight control system further comprises a micro control unit connected to a driver chipset consisting of a plurality of driver chips;

[0031] The microcontroller unit is configured to receive a maximum temperature value within the driver chipset, wherein the maximum temperature value is determined by comparing the first temperature values ​​of each driver chip within the driver chipset, and the first temperature value is obtained by the temperature detection module performing temperature detection on the driver chip; and compare the maximum temperature value with a preset system temperature threshold. If the maximum temperature value is higher than the system temperature threshold, the driver chip corresponding to the maximum temperature value is controlled to reduce the drive current output to the mini light-emitting diode to a system preset current value, and the system preset current value corresponds to the system temperature threshold.

[0032] Among them, each functional module of the backlight control system of the present application implements the steps of the backlight control method described above during operation.

[0033] In addition, to achieve the above-mentioned purpose, the present application also provides a terminal device comprising: a memory, a processor, and a backlight control program stored on the memory and runnable on the processor, wherein the backlight control program implements the steps of the backlight control method described above when executed by the processor.

[0034] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, on which a backlight control program is stored. When the backlight control program is executed by a processor, the steps of the backlight control method described above are implemented.

[0035] A backlight control method, system, terminal device and storage medium provided in an embodiment of the present application are applied to a backlight control system, wherein the backlight control system includes a driver chip and a mini light-emitting diode integrated with a temperature detection module; the backlight control method includes: obtaining a first temperature value of the driver chip obtained by the temperature detection module performing temperature detection on the driver chip; comparing the first temperature value with a preset first temperature threshold; if the first temperature value is higher than the first temperature threshold, controlling the driving current output by the driver chip to the mini light-emitting diode to be reduced to a first preset current value, wherein the first preset current value corresponds to the first temperature threshold.

[0036] Compared with the traditional backlight control system that ensures its reliability by adopting a larger number of driver chips at a reduced rating, the embodiment of the present application configures a driver chip with an integrated temperature detection module in the backlight control system, obtains multiple first temperature values ​​of multiple driver chips by obtaining the temperature detection module for the driver chip, and compares the obtained multiple first temperature values ​​with the preset first temperature threshold respectively. When the first temperature value of any driver chip is higher than the first temperature threshold, the driver chip is controlled to reduce the driving current output by itself to the mini light-emitting diode to a first preset current value, and the first preset current value corresponds to the first temperature threshold.

[0037] In this way, the embodiment of the present application dynamically adjusts the driving current of the AM Mini-LED by obtaining the temperature changes of the driver chip in the backlight control system, so as to fully release the performance of the driver chip and reduce the number of driver chips required when producing AM Mini-LED products, thereby reducing the production cost of AM Mini-LED while ensuring the reliability of AM Mini-LED. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the device structure of the hardware operating environment of the terminal device involved in the embodiment of the present application;

[0039] Figure 2 This is a system module diagram of an embodiment of the backlight control method of the present application;

[0040] Figure 3 A schematic diagram of a light panel according to an embodiment of the backlight control method of the present application;

[0041] Figure 4 This is a flow chart of an embodiment of the backlight control method of the present application;

[0042] Figure 5 This is a schematic diagram of the structure of a driver chip involved in an embodiment of the backlight control method of this application;

[0043] Figure 6 This is a schematic diagram of a control system involved in an embodiment of the backlight control method of the present application;

[0044] Figure 7 This is a functional module diagram of an embodiment of the backlight control method of the present application.

[0045] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0046] It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0047] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0048] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0049] In this application, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0051] An embodiment of the present application provides a terminal device.

[0052] like Figure 1 As shown, Figure 1 It is a schematic diagram of the device structure of the terminal device hardware operating environment involved in the embodiment of the present application.

[0053] It should be noted that the terminal device provided in the embodiment of the present application can specifically be a Mini-LED TV or other electronic product using a Mini-LED screen, wherein the terminal device provided in the embodiment of the present application is integrated with a backlight control system, which includes a micro control unit and multiple driver chips, each of the driver chips is integrated with a temperature detection module, and each of the driver chips constitutes a plurality of driver chip groups, and each of the driver chip groups is respectively connected to the micro control unit of the backlight control system.

[0054] Mini-LED is a type of LED screen, referring to LED devices with chip sizes between 50 and 200 μm. With the development of Mini-LED technology, the market is increasingly adopting Mini-LED backlighting technology in TVs, tablets, laptop screens, and other applications. Compared to traditional LCD screens, Mini-LED backlight screens offer higher brightness and contrast, providing users with a more high-definition and comfortable experience.

[0055] like Figure 1 As shown, in the hardware operating environment of the terminal device, the terminal device may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, and a communication bus 1002. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a WI-FI interface). The memory 1005 may be a high-speed RAM memory, or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0056] Those skilled in the art will understand that Figure 1 The terminal device structure shown in the figure does not constitute a limitation on the device, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0057] like Figure 2As shown in the figure, the internal system of an Am Mini-LED TV can include: a power board, a main board, a control board, a T-CON (screen driver circuit), and a Mini-LED light board with an integrated Driver IC (driver chip). The power board mainly supplies power to the main board, the control board, and the Mini-LED light board; the main function of the control board is to convert the brightness information sent by the main board and send it to the Driver IC on the corresponding light board. The Driver IC controls the current of the corresponding partition LED to achieve the corresponding brightness. Each partition can be designed to consist of a single LED, a string of LEDs, or multiple groups of LEDs connected in series and then in parallel.

[0058] The backlight source of Mini-LED TV is composed of thousands of Mini-LED lamps. In order to facilitate production and design, they are generally evenly divided into several lamp boards. The number of lamp boards can be divided into different numbers according to the actual application. In order to facilitate wiring and reduce cost interference, the driver IC of Mini-LED lamp is directly placed on the lamp board. Figure 3 As shown, each light panel can adopt the same design and share the same PCB (Printed Circuit Board), which is convenient for production and after-sales maintenance.

[0059] like Figure 1 As shown, the memory 1005 as a computer storage medium may include an operating system, a network communication module, a user interface module, and a backlight control program.

[0060] exist Figure 1 In the device shown, the network interface 1004 is mainly used to connect to the backend server and communicate data with the backend server; the user interface 1003 is mainly used to connect to the client (user end) and communicate data with the client; and the processor 1001 can be used to call the backlight control program stored in the memory 1005 and perform the following operations:

[0061] Acquire a first temperature value of the driver chip obtained by the temperature detection module performing temperature detection on the driver chip;

[0062] comparing the first temperature value with a preset first temperature threshold;

[0063] If it is compared that the first temperature value is higher than the first temperature threshold, the driving current output by the driving chip to the mini light emitting diode is controlled to be reduced to a first preset current value, and the first preset current value corresponds to the first temperature threshold.

[0064] Optionally, the processor 1001 may also be configured to call a backlight control program stored in the memory 1005, and after executing the step of obtaining the first temperature value of the driver chip obtained by the temperature detection module performing temperature detection on the driver chip, further perform the following operations:

[0065] comparing the first temperature values ​​of the driver chips in the driver chipset to determine the maximum temperature value in the driver chipset;

[0066] The maximum temperature value is transmitted to the microcontroller unit so that the microcontroller unit compares the maximum temperature value with a preset system temperature threshold. If the maximum temperature value is higher than the system temperature threshold, the driving current output by the driver chip corresponding to the maximum temperature value to the mini light-emitting diode is controlled to be reduced to a system preset current value, and the system preset current value corresponds to the system temperature threshold.

[0067] Optionally, the processor 1001 may also be configured to call a backlight control program stored in the memory 1005, and before executing the step of comparing the first temperature value with a preset first temperature threshold, further perform the following operations:

[0068] Receive the temperature threshold and threshold current configuration data sent by the micro control unit.

[0069] Optionally, the processor 1001 may also be configured to call a backlight control program stored in the memory 1005, and after executing the step of controlling the driving current output by the driver chip to the mini light-emitting diode to be reduced to a first preset current value, further perform the following operations:

[0070] Acquire a second temperature value of the driver chip obtained by the temperature detection module performing temperature detection on the driver chip;

[0071] If the second temperature value is compared to be higher than a preset second temperature threshold, the driving current output by the driver chip to the mini light-emitting diode is controlled to be reduced to a second preset current value, wherein the second temperature threshold is higher than the first temperature threshold, the second preset current value corresponds to the second temperature threshold, and the second preset current value is less than the first preset current value.

[0072] Optionally, the processor 1001 may also be configured to call a backlight control program stored in the memory 1005, and after executing the step of controlling the driving current output by the driver chip to the mini light-emitting diode to be reduced to a second preset current value, further perform the following operations:

[0073] Acquiring a third temperature value of the driver chip obtained by the temperature detection module performing temperature detection on the driver chip;

[0074] If it is compared that the third temperature value is higher than a preset third temperature threshold, the driving current output by the driver chip to the mini light-emitting diode is controlled to be reduced to a third preset current value, and / or some or all channels of the driver chip outputting the driving current to the mini light-emitting diode are closed, wherein the third temperature threshold is higher than the second temperature threshold, the third preset current value corresponds to the third temperature threshold, and the third preset current value is less than the second preset current value.

[0075] Optionally, the processor 1001 may also be configured to call a backlight control program stored in the memory 1005 to perform the following operations:

[0076] receiving a maximum temperature value within the driver chipset, wherein the maximum temperature value is determined by comparing first temperature values ​​of respective driver chips within the driver chipset, and the first temperature value is determined by the temperature detection module detecting the temperature of the driver chips;

[0077] The maximum temperature value is compared with a preset system temperature threshold. If the maximum temperature value is higher than the system temperature threshold, the driving current output by the driver chip corresponding to the maximum temperature value to the mini light-emitting diode is controlled to be reduced to a system preset current value, and the system preset current value corresponds to the system temperature threshold.

[0078] Optionally, the processor 1001 may also be configured to call a backlight control program stored in the memory 1005 to perform the following operations:

[0079] The temperature threshold and threshold current configuration data are sent to each of the driver chips.

[0080] Based on the above hardware structure, the overall concept of each embodiment of the backlight control method of the present application is proposed.

[0081] Mini-LED backlight technology is divided into two mainstream technologies: AM Mini-LED and PM Mini-LED. In actual applications, AM Mini-LED has been widely praised for its high LED partitioning, providing users with a better viewing experience. However, the driver chip of AM Mini-LED is placed inside the backlight module, which has poor heat dissipation conditions. In addition, the driver chip package is small and the specifications are relatively small. To ensure the reliability of AM Mini-LED, AM Mini-LED manufacturers need to derate the driver chip. This reduces the stress (electrical and temperature stress) to which the component is subjected during application, thereby delaying the degradation of the device parameters and increasing its service life. However, this requires more driver chips to drive AM Mini-LED, resulting in high production costs.

[0082] In response to the above phenomenon, the present application provides a backlight control method, which is applied to a backlight control system, wherein the backlight control system includes a driver chip and a mini light-emitting diode integrated with a temperature detection module; the backlight control method includes: obtaining a first temperature value of the driver chip obtained by the temperature detection module performing temperature detection on the driver chip; comparing the first temperature value with a preset first temperature threshold; if the first temperature value is higher than the first temperature threshold, controlling the driving current output by the driver chip to the mini light-emitting diode to be reduced to a first preset current value, and the first preset current value corresponds to the first temperature threshold.

[0083] Compared with traditional backlight control systems that ensure reliability by adopting a larger number of driver chips at a reduced rating, the present application configures a driver chip with an integrated temperature detection module in the backlight control system. The temperature detection module obtains multiple first temperature values ​​of multiple driver chips by performing temperature detection on the driver chip, and the obtained multiple first temperature values ​​are compared with the preset first temperature threshold respectively. When the first temperature value of any driver chip is higher than the first temperature threshold, the driver chip is controlled to reduce the driving current output to the AM Mini-LED to the first preset current value corresponding to the first temperature threshold.

[0084] In this way, this application dynamically adjusts the driving current of AM Mini-LED by obtaining the temperature changes of the driving chip in the backlight control system, so as to fully release the performance of the driving chip and reduce the number of driving chips required when producing AM Mini-LED products, thereby reducing the production cost of AM Mini-LED while ensuring the reliability of AM Mini-LED.

[0085] Based on the above-mentioned overall concept of the backlight control method of the present application, various embodiments of the backlight control method of the present application are proposed.

[0086] Please refer to Figure 4 , Figure 4 It should be noted that although the flowchart shows a logical order, in some cases, the steps of the backlight control method of the present application can be executed in a different order than shown here.

[0087] In this embodiment, the backlight control method of the present application is applied to a backlight control system, which includes a driver chip integrated with a temperature detection module and a mini light emitting diode.

[0088] It should be noted that, in this embodiment, the backlight control system can be an AM Mini-LED backlight control system, the mini light-emitting diode is an AM Mini-LED, and the driver chip is an AM driver chip.

[0089] In this embodiment, the backlight control method of the present application includes:

[0090] Step S10: obtaining a first temperature value of the driver chip obtained by the temperature detection module performing temperature detection on the driver chip;

[0091] In this embodiment, the AM Mini-LED driver chip is placed on the light board. The driver chip drives multiple zones of Mini-LEDs through its own multiple LED channels. Each driver chip is integrated with a temperature detection module for temperature monitoring. While the driver chip illuminates the Mini-LEDs at a preset brightness, it also uses the temperature detection module to read its current first temperature.

[0092] It should be noted that, in this embodiment, the internal structure of the driver chip in this embodiment is as follows: Figure 5As shown in the figure, it consists of key functional modules: a digital controller, a PWM generator, an internal oscillator, an LED fault detection module, LED driver modules, a signal interface, and a temperature detection module. The digital controller is responsible for signal processing and control, implementing LED driver control and various protection functions. The PWM generator generates PWM signals to implement LED PWM dimming control. The internal oscillator generates a stable clock signal, providing a reference clock for the entire IC system. The LED fault detection module detects LED faults such as open circuit, short circuit, and overtemperature (OTP). The LED driver modules provide constant current driving for multiple LED channels (LED1, LED2, LED3, and LEDn), enabling dimming. The signal interface is responsible for communication and data transmission with the microcontroller unit (MCU). The temperature detection module monitors the temperature of the driver chip.

[0093] Step S20: comparing the first temperature value with a preset first temperature threshold;

[0094] In this embodiment, the AM driver chip reads its own current first temperature value in real time while lighting up the Mini-LED, and compares the first temperature value with a preset first temperature threshold after reading the first temperature value.

[0095] It should be noted that in this embodiment, the driver chip can compare the temperature value with the temperature threshold immediately after each temperature value is obtained, or a certain time period can be set, and the driver chip first obtains the maximum value of the temperature read by the temperature detection module within the time period, and then compares the maximum value with the temperature threshold.

[0096] Step S30: If the first temperature value is compared to be higher than the first temperature threshold, the driving current output by the driving chip to the mini light emitting diode is controlled to be reduced to a first preset current value, where the first preset current value corresponds to the first temperature threshold.

[0097] In this embodiment, the driver chip performs constant current driving on multiple partitioned AM Mini-LEDs through multiple LED channels. When the driver chip determines that its current first temperature value is higher than the first temperature threshold, the driver chip immediately reduces the driving current output to the LED channel to the first preset current value, that is, controls the driving current output by the driver chip to each partitioned AM Mini-LED driven by itself to be reduced to the first preset current value.

[0098] For example, in a feasible embodiment, the specification of the driver chip in the AM Mini-LED backlight control system is 50mA. When the power is turned on, the driving current output by the driver chip to the AM Mini-LED is 50mA. The first temperature threshold set in advance for the driver chip in the backlight control system is 80°C, and the set first preset current value is 40mA. During operation, the driver chip lights up the Mini-LED according to the brightness information. At the same time, multiple driver chips read their own temperature values ​​through the temperature detection module and compare them with the temperature threshold. When any driver chip determines that its current temperature value is higher than 80°C, the driver chip controls the current output to the LED channel from the initial 50mA to 40mA.

[0099] In this embodiment, the present application is applied to a backlight control system, which includes a driver chip and a mini light-emitting diode integrated with a temperature detection module; the backlight control method includes: obtaining a first temperature value of the driver chip obtained by the temperature detection module performing temperature detection on the driver chip; comparing the first temperature value with a preset first temperature threshold; if the first temperature value is higher than the first temperature threshold, controlling the driving current output by the driver chip to the AM Mini-LED to be reduced to a first preset current value, and the first preset current value corresponds to the first temperature threshold.

[0100] Specifically, compared with the traditional backlight control system that uses a larger number of driver chips for derating to ensure its reliability, the present application uses the driver chip to drive the Mini-LED to complete lighting with preset brightness information, and also reads its own current first temperature value through the configured temperature detection module. Then, after reading the first temperature value, the driver chip compares the value with the preset first temperature threshold. Finally, when the driver chip determines that its current first temperature value is higher than the first temperature threshold, the driver chip immediately reduces the driving current output to the LED channel to the first preset current value, that is, controls the driving current output by the driver chip to each partition AM Mini-LED to be reduced to the first preset current value.

[0101] In this way, this application dynamically adjusts the driving current of AM Mini-LED by obtaining the temperature changes of the driving chip in the backlight control system, so as to fully release the performance of the driving chip and reduce the number of driving chips required when producing AM Mini-LED products, thereby reducing the production cost of AM Mini-LED while ensuring the reliability of AM Mini-LED.

[0102] Furthermore, based on the first embodiment of the backlight control method of the present application, a second embodiment of the backlight control method of the present application is proposed.

[0103] In this embodiment, the backlight control system further includes a micro control unit, and the micro control unit is connected to a driving chip group formed by a plurality of driving chips communicating with each other in series.

[0104] In this embodiment, after the above step S10: obtaining the first temperature value of the driver chip obtained by the temperature detection module performing temperature detection on the driver chip, the backlight control method of the present application further includes:

[0105] Step A10: comparing the first temperature values ​​of the driver chips in the driver chipset to determine the maximum temperature value in the driver chipset;

[0106] In this embodiment, after the driver chip in the backlight control system obtains its own first temperature value, it can also transmit the first temperature value through series communication between itself and the driver chips in the same group, and compare its own temperature value with the received temperature value to determine the maximum temperature value in the driver chip group.

[0107] Step A20: The maximum temperature value is transmitted to the microcontroller unit so that the microcontroller unit compares the maximum temperature value with a preset system temperature threshold. If the maximum temperature value is higher than the system temperature threshold, the driving current output by the driver chip corresponding to the maximum temperature value to the mini light-emitting diode is controlled to be reduced to a system preset current value, and the system preset current value corresponds to the system temperature threshold.

[0108] In this embodiment, after determining the maximum temperature value in the chipset, the driver chip in the backlight control system transmits the maximum temperature value to the microcontroller unit in the backlight control system, so that the microcontroller unit compares the maximum temperature value with a preset system temperature threshold. If the maximum temperature value is higher than the system temperature threshold, the driver chip corresponding to the maximum temperature value is controlled to reduce the driving current output to the AM Mini-LED to the system preset current value, and the system preset current value corresponds to the system temperature threshold.

[0109] For example, in this embodiment, the microcontroller unit is connected to multiple driver chipsets and can receive the maximum temperature values ​​of each of the multiple driver chipsets. When the microcontroller unit determines that the maximum temperature value of any chipset is higher than the system temperature threshold of 80°C, the microcontroller unit controls the driver chip corresponding to the maximum temperature value to reduce the output drive current to the system preset current value of 40mA, so that the driver chip can reduce the operating temperature.

[0110] It should be noted that in this embodiment, the driver chip will compare the first temperature values ​​read by each temperature detection module to determine the maximum temperature value and pass the maximum temperature value to the microcontroller unit only when it receives a temperature reading instruction. If the driver chip does not receive a temperature reading instruction, the driver chip only needs to directly control the reduction of its own driving current according to its own first temperature value detected by the temperature detection module. According to actual application needs, the user can set the system temperature threshold and the first temperature threshold to the same value, set the system preset current value and the first preset current value to the same value, or set the system temperature threshold and the system preset current value to other values. This application does not make specific restrictions on this.

[0111] Optionally, in a feasible embodiment, before the above step S20: comparing the first temperature value with a preset first temperature threshold, the backlight control method of the present application further includes:

[0112] Step A30: receiving the temperature threshold and threshold current configuration data sent by the micro control unit.

[0113] In this embodiment, the driver chip of the backlight control system receives the temperature threshold and threshold current configuration data sent by the microcontroller unit after power-on, wherein the configuration data includes a first temperature threshold and a first preset current value. After receiving the configuration data, the driver chip can compare its own temperature value with the first temperature threshold, and when its own temperature exceeds the first temperature threshold, reduce the driving current to the first preset current value corresponding to the first temperature threshold.

[0114] In this embodiment, the present application is applied to a backlight control system. By determining the maximum temperature value within the driver chipset and transmitting this maximum temperature value to the microcontroller in the backlight control system, the microcontroller controls the corresponding driver chip to reduce the drive current output to the AM Mini-LED based on the received temperature value. The microcontroller reads the temperature value of the highest-temperature driver chip in each group of series-connected driver chips, performs intelligent system adjustments, and obtains the status of the entire Mini-LED backlight system and the performance release of the driver chips. In HDR (high dynamic range), compared with traditional solutions, the release capacity of the driver chip can be further improved, instantly increasing the brightness of the Mini-LED backlight.

[0115] In this way, by transmitting the maximum temperature value of each driver chip group to the microcontroller, the microcontroller can accurately detect and control the operating temperature of the driver chips, thereby fully unleashing the performance of the driver chips in the backlight control system without reserving margin. At the same time, the microcontroller can detect the highest temperature of the driver chips in real time and perform intelligent dynamic adjustments, greatly improving the performance and reliability of the system.

[0116] Furthermore, based on the first embodiment and / or the second embodiment of the backlight control method of the present application, a third embodiment of the backlight control method of the present application is proposed.

[0117] In this embodiment, after the step of "controlling the driving current output by the driver chip to the mini light emitting diode to decrease to a first preset current value" in the above step S30, the backlight control method of the present application further includes:

[0118] Step B10: obtaining a second temperature value of the driver chip obtained by the temperature detection module performing temperature detection on the driver chip;

[0119] In this embodiment, after the driver chip that has reached the first temperature threshold reduces the driving current output to the AM Mini-LED, the chip temperature rise can be temporarily suspended. However, as the working time increases, its temperature value will continue to rise. The driver chip then continues to read the second temperature value after reducing the driving current through the temperature detection module.

[0120] Step B20: If the second temperature value is compared to be higher than the preset second temperature threshold, the driving current output by the driving chip to the mini light-emitting diode is controlled to be reduced to a second preset current value, wherein the second temperature threshold is higher than the first temperature threshold, the second preset current value corresponds to the second temperature threshold, and the second preset current value is less than the first preset current value.

[0121] In this embodiment, the driver chip that drives the Mini-LED with a first preset current value continues to read a second temperature value through the temperature detection module, and compares the read second temperature value with a preset second temperature threshold. When the driver chip determines that its own second temperature value is higher than the second temperature threshold, it immediately reduces the driving current output to the LED channel to a second preset current value corresponding to the second temperature threshold, wherein the second temperature threshold is higher than the first temperature threshold, and the second preset current value is lower than the first preset current value.

[0122] Optionally, in a feasible embodiment, after the step of “controlling the driving current output by the driver chip to the mini light-emitting diode to decrease to a second preset current value” in the above step B20, the backlight control method of the present application further includes:

[0123] Step B30: obtaining a third temperature value of the driver chip obtained by the temperature detection module performing temperature detection on the driver chip;

[0124] In this embodiment, after the driver chip reduces the driving current to the second preset current value, the temperature value of the driver chip will continue to rise as the working time increases. The driver chip then continues to read the third temperature value after the second reduction of the driving current through the temperature detection module.

[0125] Step B40: If it is compared that the third temperature value is higher than the preset third temperature threshold, the driving current output by the driver chip to the mini light-emitting diode is controlled to be reduced to a third preset current value, and / or some or all channels of the driver chip outputting the driving current to the mini light-emitting diode are closed, wherein the third temperature threshold is higher than the second temperature threshold, and the third preset current value is less than the second preset current value.

[0126] In this embodiment, after the driver chip reduces its own driving current to the second preset current value, it continues to read its own third temperature value and compares the read third temperature value with the preset third temperature threshold. When the driver chip determines that its own third temperature value is higher than the third temperature threshold, it immediately reduces the driving current output by itself to the LED channel to the third preset current value corresponding to the third temperature threshold. Alternatively, the driver chip maintains the second preset current value to output the driving current to the Mini-LED and turns off part or all of the LED channels that output the driving current, wherein the third temperature threshold is higher than the second temperature threshold, and the third preset current value is less than the second preset current value.

[0127] In another feasible embodiment, when the driver chip determines that its third temperature value is higher than the third temperature threshold, it can also simultaneously reduce the driving current to a third preset current value and turn off some or all LED channels to quickly cool the chip.

[0128] It should be noted that, in this embodiment, each driver chip has multiple LED channels, and each LED channel is connected to a partitioned Mini-LED. When the driver chip determines that its own third temperature value is higher than the third temperature threshold, in order to ensure that the driver chip can continue to operate, it closes some or all of its LED channels that output driving current to the Mini-LED. When the temperature drops below the third temperature threshold, the closed channels are reopened. In actual use, the user can set the specific number of channels to be closed, and this application does not make any specific restrictions on it.

[0129] For example, in this embodiment, the specification of the driver chip is 50mA. Compared with the traditional backlight control system, the driver chip is derated to 35mA (75% of the driver chip usage rules) to ensure reliability. In this embodiment, the driver chip is used with a driving current of 50mA after power-on. During use, when the temperature of the driver chip rises to 80°C, the driving current is reduced to 45mA (90% of the driver chip usage rules) and continued to be used. When the driver chip rises to 100°C again, the driving current is reduced to 40mA (80% of the driver chip usage rules) and continued to be used. When the operating temperature of the driver chip rises to 120°C, the driving current is reduced to 35mA (75% of the driver chip usage rules) and continued to be used, and some LED channels of the driver chip can be closed to reduce losses.

[0130] In this embodiment, the present application is applied to a backlight control system. By setting temperature thresholds of different gears for the driver chip, it is ensured that the driver chip can reduce the driving current value by a small amount when reducing it for the first time, so as to prevent the driver chip from reducing the current too much and causing the driver chip performance to be not significantly released. Based on actual usage needs, the user can set the temperature thresholds and current values ​​of three gears, or set other numbers of gears to complete the adjustment of the AM Mini-LED driving current.

[0131] In this way, this application dynamically adjusts the driving current of AM Mini-LED by obtaining the temperature changes of the driving chip in the backlight control system, so as to fully release the performance of the driving chip and reduce the number of driving chips required when producing AM Mini-LED products, thereby reducing the production cost of AM Mini-LED while ensuring the reliability of AM Mini-LED.

[0132] Furthermore, based on the first embodiment and / or the second embodiment and / or the third embodiment of the backlight control method of the present application, a fourth embodiment of the backlight control method of the present application is proposed.

[0133] In this embodiment, the backlight control method of the present application is applied to a backlight control system, which includes a microcontroller unit and multiple driver chips. Each of the driver chips is integrated with a temperature detection module. Each of the driver chips forms a multiple driver chip group, and each of the driver chip groups is respectively connected to the microcontroller unit.

[0134] like Figure 6As shown, the backlight control system consists of a mainboard, a control board (including a microcontroller), a light board (including a driver chip), and a power board. The power board receives power from the mains (typically 220V) via an AC outlet. Its primary function is to convert the AC input voltage into a DC voltage to power the system. It outputs 12V to power the mainboard and control board, and 20V to power the mainboard's power amplifier. An adjustable output voltage (V_LED) is then passed through the control board to power the Mini-LEDs on the light board. The mainboard provides control signals and a power standby signal to the control board (including the microcontroller). Based on the brightness distribution and characteristics of the TV signal, the mainboard sends signals to the microcontroller in the constant current control system via SPI (Serial Peripheral Interface). The microcontroller transmits the brightness information from the mainboard to the corresponding driver chip on the light board in real time, enabling real-time brightness control of the corresponding backlight area and achieving precise control of the Mini-LED backlight.

[0135] The backlight control method of the present application further includes:

[0136] Step C10: receiving a maximum temperature value within the driver chipset, wherein the maximum temperature value is determined by comparing first temperature values ​​of respective driver chips within the driver chipset, and the first temperature values ​​are determined by the temperature detection module detecting the temperature of the driver chips;

[0137] In this embodiment, the microcontroller unit (MCU) in the backlight control system is in communication with multiple driver chipsets, with the driver chips within each driver chipset connected in series. After the backlight control system is powered on, the MCU receives a maximum temperature value from the driver chipset. This maximum temperature value is determined by comparing the first temperature values ​​of each chip within the chip group. The first temperature value is the temperature of each driver chip within the group, as measured by a temperature detection module.

[0138] Step C20: Compare the maximum temperature value with a preset system temperature threshold. If the maximum temperature value is higher than the system temperature threshold, control the driving current output by the driver chip corresponding to the maximum temperature value to the mini light-emitting diode to be reduced to a system preset current value, and the system preset current value corresponds to the system temperature threshold.

[0139] In this embodiment, after receiving the maximum temperature value transmitted by the driver chipset, the microcontroller unit of the AM Mini-LED controls its corresponding target driver chip to reduce the driving current output to the AM Mini-LED according to the maximum temperature value. Specifically, the microcontroller unit determines that any maximum temperature value received is higher than the system temperature threshold, then the microcontroller unit controls the driver chip in the driver chipset corresponding to the maximum temperature value to reduce the output driving current to the system preset current value, so that the driver chip can reduce the operating temperature.

[0140] In addition, in a feasible embodiment, the microcontroller unit compares the received maximum temperature value with the temperature threshold. If it is determined that the maximum temperature value is greater than the system temperature threshold, the driver chip corresponding to the maximum temperature value is controlled to reduce the driving current to the system preset current value, wherein the system temperature threshold can be consistent with the above-mentioned first temperature threshold, and the system preset current value can be consistent with the above-mentioned first preset current value. New temperature thresholds and current values ​​can also be set. The microcontroller unit can also set multiple temperature thresholds and multiple driving current values ​​for the received maximum temperature value. This application does not make specific limitations on this.

[0141] It should be noted that in this embodiment, the microcontroller unit can of course read the temperature value of each driver chip, but this takes a long time and causes severe tailing of the AM Mini-LED backlight. To simplify the control system's processing time, allowing the control board to spend more time receiving and distributing brightness information and achieving a one-to-one correspondence between the Mini-LED backlight and the LCD display, the microcontroller unit reads the highest temperature driver chip returned by each driver chipset to reduce processing time.

[0142] Optionally, in a feasible embodiment, the backlight control method of the present application further includes:

[0143] Step C30: sending temperature threshold and threshold current configuration data to each of the driver chips.

[0144] In this embodiment, the microcontroller unit in the backlight control system receives a setting instruction input from the outside, and sets the temperature threshold and threshold current configuration data according to the instruction. After setting the configuration data, the microcontroller unit sends the configuration data to each driver chip, wherein the configuration data includes a first temperature threshold and a corresponding first preset current value. After receiving the configuration data, the driver chip can compare the acquired first temperature value with the first temperature threshold, and when it is compared that the first temperature value is higher than the first temperature threshold, it controls the driving current output to the AM Mini-LED to be reduced to the first preset current value.

[0145] It should be noted that, in this embodiment, the configuration data sent by the microcontroller unit in the backlight control system to each driver chip also includes a second temperature threshold and a corresponding second preset current value, a third temperature threshold and a corresponding third preset current value, so that the driver chip can dynamically adjust the driving current according to the temperature thresholds of different gears to fully release the performance of the driver chip.

[0146] For example, in a feasible embodiment, the microcontroller unit can set the first temperature threshold, the second temperature threshold and the third temperature threshold for the driver chip according to the setting instruction. Specifically, the three temperature thresholds can be set to 80°C, 100°C and 120°C respectively, and the corresponding threshold current value is set for each temperature threshold. Based on actual usage needs, the user can also set the temperature threshold of the driver chip to other temperature values, or set more temperature thresholds. The backlight control method of this application does not make specific limitations on this.

[0147] In this embodiment, the present application is applied to a backlight control system, which includes a microcontroller unit and multiple driver chips, each of which has an integrated temperature detection module. The driver chips form multiple driver chip groups, and each of the driver chip groups is separately connected to the microcontroller unit. The present application uses the microcontroller unit to read the temperature value of the highest-temperature driver chip in each group of serially connected driver chips, perform intelligent system adjustments, and obtain the status of the entire Mini-LED backlight system and the performance release of the driver chips. In HDR (high dynamic range), compared with traditional solutions, the release capacity of the driver chips can be further improved, instantly increasing the brightness of the Mini-LED backlight.

[0148] Thus, by precisely detecting and controlling the operating temperature of the driver chip by the microcontroller, the present application can fully unleash the performance of the driver chip in the backlight control system without reserving margin. Furthermore, the microcontroller can detect the highest temperature of the driver chip in real time and perform intelligent dynamic adjustments, greatly improving the performance and reliability of the system.

[0149] In addition, please refer to Figure 7 , the embodiment of the present application also proposes a backlight control system, the backlight control system of the present application includes a driver chip integrated with a temperature detection module and a mini light emitting diode;

[0150] Among them, the driver chip is used to obtain the first temperature value of the driver chip obtained by the temperature detection module performing temperature detection on the driver chip; compare the first temperature value with a preset first temperature threshold; if the first temperature value is higher than the first temperature threshold, control the driving current output by the driver chip to the mini light-emitting diode to be reduced to a first preset current value, and the first preset current value corresponds to the first temperature threshold.

[0151] Optionally, the backlight control system of the present application further comprises a micro control unit, wherein the micro control unit is connected to a driving chipset formed by a plurality of driving chips communicating with each other in series;

[0152] The driver chip is further used to compare the first temperature values ​​of each driver chip in the driver chipset to determine the maximum temperature value in the driver chipset; transmit the maximum temperature value to the microcontroller unit so that the microcontroller unit compares the maximum temperature value with a preset system temperature threshold; if the maximum temperature value is higher than the system temperature threshold, the driver chip corresponding to the maximum temperature value is controlled to reduce the driving current output to the mini light-emitting diode to a system preset current value, and the system preset current value corresponds to the system temperature threshold.

[0153] Optionally, the driver chip is further configured to receive temperature threshold and threshold current configuration data sent by the micro control unit.

[0154] Optionally, the driver chip is further configured to obtain a second temperature value of the driver chip obtained by the temperature detection module performing temperature detection on the driver chip; and obtain a third temperature value of the driver chip obtained by the temperature detection module performing temperature detection on the driver chip.

[0155] Optionally, the driver chip is further used to control the driving current output by the driver chip to the mini light-emitting diode to be reduced to a second preset current value if the second temperature value is compared to be higher than a preset second temperature threshold, wherein the second temperature threshold is higher than the first temperature threshold, the second preset current value corresponds to the second temperature threshold, and the second preset current value is less than the first preset current value; and, if the third temperature value is compared to be higher than a preset third temperature threshold, control the driving current output by the driver chip to the mini light-emitting diode to be reduced to a third preset current value, and / or close part or all channels through which the driver chip outputs driving current to the mini light-emitting diode, wherein the third temperature threshold is higher than the second temperature threshold, the third preset current value corresponds to the third temperature threshold, and the third preset current value is less than the second preset current value.

[0156] Optionally, the microcontroller unit is further used to receive a maximum temperature value in the driver chipset, wherein the maximum temperature value is determined by comparing the first temperature values ​​of each driver chip in the driver chipset, and the first temperature value is obtained by the temperature detection module performing temperature detection on the driver chip; and compare the maximum temperature value with a preset system temperature threshold. If the maximum temperature value is higher than the system temperature threshold, the driver chip corresponding to the maximum temperature value is controlled to reduce the driving current output to the mini light-emitting diode to a system preset current value, and the system preset current value corresponds to the system temperature threshold.

[0157] Optionally, the micro control unit is further configured to send temperature threshold and threshold current configuration data to each of the driver chips.

[0158] The functional implementation of each module in the above-mentioned backlight control system corresponds to each step in the above-mentioned backlight control method embodiment, and their functions and implementation processes are not described here one by one.

[0159] In addition, the present application also proposes a storage medium on which a running program for backlight control is stored. When the backlight control program is executed by a processor, the steps of the backlight control method of the present application as described above are implemented.

[0160] The specific embodiments of the storage medium of the present application are basically the same as the embodiments of the backlight control method described above, and will not be described in detail here.

[0161] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0162] The serial numbers of the above embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0163] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0164] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A backlight control method, characterized in that: The backlight control method is applied to a backlight control system, which includes a driver chip integrated with a temperature detection module and a mini light-emitting diode, wherein the internal structure of the driver chip includes a digital controller, a PWM generator, an internal oscillator, an LED fault detection module, an LED driver module, and a signal transmission interface; The backlight control method comprises: Acquire a first temperature value of the driver chip obtained by the temperature detection module performing temperature detection on the driver chip; comparing the first temperature value with a preset first temperature threshold; If the first temperature value is higher than the first temperature threshold, the driving current output by the driver chip to the mini light emitting diode is controlled to be reduced to a first preset current value, where the first preset current value corresponds to the first temperature threshold; The backlight control system further comprises a micro control unit, the micro control unit being connected to a driving chipset formed by a plurality of driving chips communicating with each other in series; After the step of obtaining a first temperature value of the driver chip obtained by the temperature detection module performing temperature detection on the driver chip, the method further includes: comparing the first temperature values ​​of the driver chips in the driver chipset to determine the maximum temperature value in the driver chipset; The maximum temperature value is transmitted to the microcontroller unit so that the microcontroller unit compares the maximum temperature value with a preset system temperature threshold. If the maximum temperature value is higher than the system temperature threshold, the driving current output by the driver chip corresponding to the maximum temperature value to the mini light-emitting diode is controlled to be reduced to a system preset current value, and the system preset current value corresponds to the system temperature threshold.

2. The backlight control method according to claim 1, wherein: Before the step of comparing the first temperature value with a preset first temperature threshold, the method further includes: Receive the temperature threshold and threshold current configuration data sent by the micro control unit.

3. The backlight control method according to claim 1, wherein: After the step of controlling the driving current output by the driving chip to the mini light emitting diode to be reduced to a first preset current value, the method further includes: Acquire a second temperature value of the driver chip obtained by the temperature detection module performing temperature detection on the driver chip; If the second temperature value is compared to be higher than a preset second temperature threshold, the driving current output by the driver chip to the mini light-emitting diode is controlled to be reduced to a second preset current value, wherein the second temperature threshold is higher than the first temperature threshold, the second preset current value corresponds to the second temperature threshold, and the second preset current value is less than the first preset current value.

4. The backlight control method according to claim 3, wherein: After the step of controlling the driving current output by the driving chip to the mini light emitting diode to be reduced to a second preset current value, the method further includes: Acquiring a third temperature value of the driver chip obtained by the temperature detection module performing temperature detection on the driver chip; If it is compared that the third temperature value is higher than a preset third temperature threshold, the driving current output by the driver chip to the mini light-emitting diode is controlled to be reduced to a third preset current value, and / or some or all channels of the driver chip outputting the driving current to the mini light-emitting diode are closed, wherein the third temperature threshold is higher than the second temperature threshold, the third preset current value corresponds to the third temperature threshold, and the third preset current value is less than the second preset current value.

5. A backlight control system, characterized in that: The backlight control system includes a driver chip integrated with a temperature detection module and a mini light-emitting diode, wherein the internal structure of the driver chip includes a digital controller, a PWM generator, an internal oscillator, an LED fault detection module, an LED driver module, and a signal transmission interface; The driver chip is configured to obtain a first temperature value of the driver chip obtained by the temperature detection module performing temperature detection on the driver chip; compare the first temperature value with a preset first temperature threshold; and, if the first temperature value is higher than the first temperature threshold, control the driver chip to reduce the driving current output by the driver chip to the mini light-emitting diode to a first preset current value, where the first preset current value corresponds to the first temperature threshold; The backlight control system further comprises a micro control unit connected to a driver chipset consisting of a plurality of driver chips; The driver chip is further configured to compare the first temperature values ​​of the driver chips in the driver chipset to determine a maximum temperature value in the driver chipset; transmit the maximum temperature value to the microcontroller unit so that the microcontroller unit compares the maximum temperature value with a preset system temperature threshold; and if the maximum temperature value is higher than the system temperature threshold, control the driver chip corresponding to the maximum temperature value to output a driving current to the mini light-emitting diode to a system preset current value, where the system preset current value corresponds to the system temperature threshold; The microcontroller unit is configured to receive a maximum temperature value within the driver chipset, wherein the maximum temperature value is determined by comparing the first temperature values ​​of each driver chip within the driver chipset, and the first temperature value is obtained by the temperature detection module performing temperature detection on the driver chip; and compare the maximum temperature value with a preset system temperature threshold. If the maximum temperature value is higher than the system temperature threshold, the driver chip corresponding to the maximum temperature value is controlled to reduce the drive current output to the mini light-emitting diode to a system preset current value, and the system preset current value corresponds to the system temperature threshold.

6. A terminal device, characterized in that: The terminal device includes: a memory, a processor, and a backlight control program stored in the memory and executable on the processor. When the backlight control program is executed by the processor, the steps of the backlight control method according to any one of claims 1 to 4 are implemented.

7. A storage medium, characterized in that: The storage medium stores a backlight control program, which, when executed by a processor, implements the steps of the backlight control method according to any one of claims 1 to 4.

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