A display device, system and method

Abstract

This invention relates to the field of screen displays, and particularly to a display device, system, and method. The device includes a processor and a first number of chipsets; each chipset is identical, and each chipset includes a second number of backlight chips. Each backlight chip in the same chipset is connected to an external liquid crystal display screen corresponding to the chipset. The processor includes a second number of ports, each port being connected to the first number of identical backlight chips. Any two backlight chips connected to each port belong to different chipsets, and each backlight chip is connected to one port. Each port is used to send the same control signal to each backlight chip connected to the port, and each liquid crystal display screen is used to display based on the control signals received by all the backlight chips connected to the liquid crystal display screen. Therefore, this invention can reduce the possibility of significant differences in the display states of different liquid crystal displays.

Description

Technical Field

[0001] This invention relates to the field of screen display, and in particular to a display device, system, and method. Background Technology

[0002] With the continuous advancement of technology, display devices can be applied to smart products with multi-screen synchronous displays, such as smart glasses.

[0003] Current display devices include several backlight chips, each connected to a corresponding external liquid crystal display (LCD). During the display process, all backlight chips connected to each LCD are controlled to send electrical signals to that LCD, with the aim of ensuring that each LCD receives the same electrical signal at the same time, thereby making the display brightness and other display states of each LCD similar at any given time.

[0004] However, each backlight chip connected to an LCD screen works independently. Considering the differences in the signals transmitted between different backlight chips, the electrical signals received by each LCD screen at the same time may vary greatly, resulting in significant differences in the display states of different LCD screens. Summary of the Invention

[0005] To address the aforementioned technical problems, the technical solution adopted by this invention is as follows:

[0006] According to one aspect of the present invention, a display device is provided, the device comprising a processor and a first number of chipsets.

[0007] Each chipset is identical, and each chipset includes a second number of backlight chips. Each backlight chip in the same chipset is connected to an external liquid crystal display screen corresponding to the chipset.

[0008] The processor includes a second number of ports, each of which is connected to the first number of identical backlight chips.

[0009] Each port connects to any two backlight chips that belong to different chipsets, and each backlight chip connects to 1 port.

[0010] Each port is used to send the same control signal to each backlight chip connected to the port, and each LCD screen is used to display based on the control signals received by all the backlight chips connected to the LCD screen.

[0011] According to another aspect of the present invention, a display system is also provided, the system comprising a first number of liquid crystal displays and the aforementioned display device.

[0012] According to another aspect of the present invention, a display method is also provided, applied to the processor of the above-described display device, the method comprising:

[0013] In response to receiving a display request, the target voltage and target current are obtained.

[0014] According to the first preset condition, at least some of the ports of the processor are determined as target ports, and each port of the processor other than the target ports is determined as a non-target port. The first preset condition includes: the backlight chips connected to all target ports belong to the same chipset, the maximum total voltage provided to the LCD screen corresponding to the chipset is greater than or equal to the target voltage, and the maximum total current provided to the LCD screen corresponding to the chipset is greater than or equal to the target current.

[0015] A signal is sent to each connected backlight chip via each non-target port to indicate that the corresponding backlight chip is turned off.

[0016] Each target port sends a signal to each connected backlight chip to indicate that the corresponding backlight chip is turned on.

[0017] Each target port is controlled to send a target control signal corresponding to the target port to each connected backlight chip, so that each LCD screen displays at the target voltage and target current.

[0018] The present invention has at least the following beneficial effects:

[0019] This invention addresses this issue by configuring any two backlight chips connected to the same LCD screen to different processor ports, and further by connecting any two backlight chips connected to the same processor port to different LCD screens. During LCD display, the processor sends a control signal through the same port, ensuring that the backlight chips connected to the same port receive the same control signal almost simultaneously. This results in a generally similar total number of control signals received by all backlight chips connected to each LCD screen at the same time, leading to similar or even identical display states, such as brightness, across different LCD screens connected to the display device. In contrast, related technologies often connect different backlight chips to different ports, resulting in significant differences in the total number of control signals received by all backlight chips connected to each LCD screen at the same time, leading to substantial differences in display states across different LCD screens. Therefore, this invention reduces the likelihood of significant differences in display states across different LCD screens compared to related technologies. When this display device is applied to smart devices such as VR glasses, the reduced likelihood of significant differences in display states across different LCD screens improves the user experience. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram illustrating the connection between the backlight chip and the liquid crystal display screen provided in an embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram illustrating the connection between the backlight chip and the processor provided in an embodiment of the present invention.

[0023] Figure 3 A flowchart of a display method provided in an embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of a liquid crystal display screen provided in an embodiment of the present invention. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] This invention provides a display device. The display device includes a processor and a first number of chipsets; each chipset is identical, and each chipset includes a second number of backlight chips. Each backlight chip in the same chipset is connected to an external liquid crystal display screen corresponding to the chipset. The processor includes a second number of ports, each port being connected to the first number of identical backlight chips. Any two backlight chips connected to each port belong to different chipsets, and each backlight chip is connected to one port. The external liquid crystal display screen is an external liquid crystal display screen of the display device. Since the number of chipsets is the first number, the total number of liquid crystal displays connected to the display device is also the first number.

[0027] Each port is used to send the same control signal to each backlight chip connected to the port, and each LCD screen is used to display based on the control signals received by all the backlight chips connected to the LCD screen.

[0028] Specifically, the processor can be a central processing unit.

[0029] For example, such as Figure 1The diagram showing the connection between the backlight chip and the LCD screen is shown. Figure 2 The diagram shows the connection between the backlight chips and the processor. Both the first and second chipsets have two components. The first chipset includes backlight chips BacklightIC1 and BacklightIC2, and is connected to LCD1. The second chipset includes backlight chips BacklightIC3 and BacklightIC4, and is connected to LCD2. The enable pins of BacklightIC1 and BacklightIC3 are connected to the processor via GPIOA, while the enable pins of BacklightIC2 and BacklightIC4 are connected via GPIOB. Backlight IC1 and BacklightIC3 are the same backlight chip, and BacklightIC2 and BacklightIC4 are also the same backlight chip.

[0030] in addition, Figure 1 In this context, IIC1 is the first bus, and IIC2 is the second bus. Figure 2 The “□” in the figure represents the register of the corresponding backlight chip.

[0031] Based on the aforementioned display device, during the display process of LCD1 and LCD2, the processor sends a first control signal to the backlight chips BacklightIC1 and BacklightIC3 connected to port GPIOA. Then, BacklightIC1 sends a first electrical signal to LCD1, and BacklightIC3 also sends a first electrical signal to LCD2. The current of the first electrical signal is the first current value corresponding to the first control signal, and the voltage of the first electrical signal is the first voltage value corresponding to the first control signal.

[0032] The processor also sends a second control signal to the backlight chips BacklightIC2 and BacklightIC4 connected to the port via port GPIOB. BacklightIC2 then sends a second electrical signal to the LCD1 display, and BacklightIC4 also sends a second electrical signal to the LCD2 display. The current of the second electrical signal is the same as the second current value corresponding to the second control signal, and the voltage of the second electrical signal is the same as the second voltage value corresponding to the second control signal.

[0033] Finally, both LCD1 and LCD2 receive the first and second electrical signals. Since the electrical signals received by LCD1 and LCD2 are basically the same at this time, LCD1 and LCD2 will display with similar or even identical display brightness and other display states.

[0034] Furthermore, the display device can be applied to smart glasses, such as VR glasses, and LCD1 and LCD2 are the two displays for VR glasses.

[0035] Therefore, this invention, by setting any two backlight chips connected to the same LCD screen to different processor ports, and any two backlight chips connected to the same processor port to different LCD screens, allows the processor to send a control signal through the same port during LCD display. This ensures that the backlight chips connected to the same port receive the same control signal at approximately the same time. Consequently, the total number of control signals received by all backlight chips connected to each LCD screen at the same time is essentially the same, resulting in similar or even identical display states, such as brightness, on different LCD screens connected to the display device at the same time. In contrast, in related technologies, different backlight chips in the display device are connected to different ports, leading to significant differences in the total number of control signals received by all backlight chips connected to each LCD screen at the same time, resulting in significant differences in the display states of different LCD screens connected to the display device at the same time. Therefore, compared to related technologies, this invention reduces the possibility of significant differences in the display states of different LCD screens. When this display device is applied to smart devices such as VR glasses, the reduced possibility of significant differences in the display states of different LCD screens improves the user experience.

[0036] Specifically, smart devices can be XR (Extended Reality) devices, such as AR (Augmented Reality), VR (Virtual Reality), and MR (Mixed Reality) devices.

[0037] Optionally, each LCD screen is identical.

[0038] For example, the liquid crystal display screens LCD1 and LCD2 described above are identical. In one possible implementation, LCD1 and LCD2 can be selected from liquid crystal display screens of the same model to ensure that LCD1 and LCD2 are as identical as possible.

[0039] Therefore, it can be seen that each liquid crystal display screen in this invention is identical. Compared to the case where any liquid crystal display screen connected to the display device is different from another liquid crystal display screen, this invention can make the display states of different liquid crystal display screens more similar or even identical at the same time, when the total control signals received by all backlight chips connected to each liquid crystal display screen are basically the same at the same time, thereby further reducing the possibility of large differences in the display states of different liquid crystal display screens.

[0040] Optionally, each backlight chip is identical.

[0041] For example, the backlight chips BacklightIC1, BacklightIC2, BacklightIC3, and BacklightIC4 described above are all identical. In one possible implementation, Backlight IC1, BacklightIC2, BacklightIC3, and BacklightIC4 can be selected from backlight chips of the same model to ensure that Backlight IC1, BacklightIC2, BacklightIC3, and BacklightIC4 are as identical as possible.

[0042] Therefore, it can be seen that by setting each backlight chip in the display device to be identical, the present invention can facilitate the design of the control logic inside the display device and the production and assembly of the display device.

[0043] This invention also provides a display system, which includes a first number of liquid crystal displays and the aforementioned display device.

[0044] Specifically, the first number of liquid crystal displays included in the display system are the first number of liquid crystal displays external to and connected to the display device.

[0045] This invention also provides a display method, applied to the processor of the aforementioned display device, such as... Figure 3 The flowchart shown illustrates a display method that includes the following steps:

[0046] S100, in response to receiving a display request, acquires the target voltage and target current.

[0047] One specific implementation of step S100 above is that after the processor receives the display request, it can parse the display request to determine the target voltage and target current required for the liquid crystal display screen to display in a certain display state.

[0048] S200, according to the first preset condition, at least some of the ports of the processor are determined as target ports, and each port of the processor other than the target port is determined as a non-target port.

[0049] The first preset condition includes: among all the backlight chips connected to the target ports, the backlight chips belonging to the same chipset provide a maximum total voltage to the LCD screen corresponding to the chipset that is greater than or equal to the target voltage, and the maximum total current provided to the LCD screen corresponding to the chipset that is greater than or equal to the target current.

[0050] S300 sends a signal to each connected backlight chip through each non-target port to indicate that the corresponding backlight chip is turned off.

[0051] Specifically, the signal used to indicate that the corresponding backlight chip is turned off can be a low level.

[0052] One specific implementation of step S300 above can be that, after determining the target port and non-target ports, the processor can send signals through all non-target ports to all backlight chips connected to each non-target port, indicating that the corresponding backlight chip should be turned off, thereby controlling all backlight chips connected to the non-target ports to be turned off. The turning off of the backlight chips can be achieved by the backlight chip entering a sleep state, etc.

[0053] S400 sends a signal through each target port to each connected backlight chip to indicate that the corresponding backlight chip is turned on.

[0054] Specifically, the signal used to indicate that the corresponding backlight chip is turned on can be a high level.

[0055] One specific implementation of step S400 above can be that, after determining the target port and non-target ports, the processor can send signals through all target ports to all backlight chips connected to each target port to instruct the corresponding backlight chip to be turned on, thereby controlling all backlight chips connected to the target ports to be turned on and operate normally. The backlight chip being turned off can be achieved by the backlight chip entering a sleep state, etc.

[0056] S500 controls each target port to send the target control signal corresponding to the target port to each connected backlight chip, so that each LCD screen displays with the target voltage and target current.

[0057] One specific implementation of step S500 above can be that a target control signal is obtained according to the display brightness setting, and then the processor can control each target port to send the target control signal to each connected backlight chip. Then, all the backlight chips connected to each liquid crystal display that receive the target control signal can control the backlight in the liquid crystal display to emit light normally, that is, the backlight of the liquid crystal display receives the target voltage and target current, and then the liquid crystal display can display according to the above display brightness.

[0058] Therefore, in this invention, the processor, upon receiving a display request, identifies several target ports and / or several non-target ports among several ports. This ensures that the backlight chips connected to all target ports are sufficient to provide the target voltage and target current required for each liquid crystal display (LCD) screen to display. Then, it controls all backlight chips connected to the non-target ports to turn off and controls all backlight chips connected to the target ports to turn on, enabling each LCD screen to display through the backlight chips connected to all target ports. Compared to a system where every backlight chip connected to the LCD screen is still active when the display system is in a low-power state, in this invention, at least some backlight chips can be turned off when the target voltage or target current required for LCD display is low. This reduces the power consumption of the display system, making it more energy-efficient. Furthermore, it can extend the battery life of the display system and reduce the heat generated by the display system.

[0059] Furthermore, compared to replacing the multiple backlight chips in this invention with a smaller number of higher-performance backlight chips, the larger number of backlight chips in this invention allows for the use of lower-performance backlight chips. Lower-performance backlight chips are generally much smaller than high-performance backlight chips. Therefore, the use of multiple smaller backlight chips in this invention reduces the motherboard area and simplifies wiring, saving motherboard costs. In terms of structural design, it requires less space, facilitating the structural design of the display system. Additionally, using multiple backlight chips in the display system of this invention, compared to using higher-performance backlight chips, reduces the heat generated by the backlight chips, saving on the cost of the backlight chips and the cost of powering them.

[0060] Optionally, the first preset condition also includes:

[0061] Any number of backlight chips belonging to the same chipset among all the backlight chips connected to the target ports provide a maximum total voltage to the LCD screen corresponding to the chipset that is less than the target voltage, or a maximum total current to the LCD screen corresponding to the chipset that is less than the target current.

[0062] The number of targets is 1 less than the number of backlight chips belonging to the same chipset among all the backlight chips connected to the target ports.

[0063] For example, for any chipset, if the number of backlight chips in the chipset is 3, and the number of backlight chips connected to the target port in the chipset is 2, then the target quantity corresponding to the chipset is 1. Based on this, the maximum total voltage that the two backlight chips in the chipset connected to the target port can provide to the corresponding LCD screen is greater than or equal to the target voltage, and the maximum total current that the two backlight chips in the chipset connected to the target port can provide to the corresponding LCD screen is greater than or equal to the target current; the maximum total voltage that any target chip in the chipset can provide to the corresponding LCD screen is less than the target voltage, or the maximum total current that any target chip in the chipset can provide to the corresponding LCD screen is less than the target current.

[0064] Therefore, it can be seen that the condition that any number of target chips in the same chipset of the backlight chips in the first preset condition can minimize the number of target port connections, thereby reducing the power consumption of the display system and making the display system more energy-efficient.

[0065] In one possible implementation, each backlight chip is connected in parallel with every other backlight chip in its chipset; the maximum output voltage of backlight chips belonging to the same chipset is the same and greater than or equal to the target voltage.

[0066] Based on this, step S200 above includes the following steps:

[0067] S210: Based on the fact that the sum of the maximum output currents corresponding to all target ports is greater than or equal to the target current, at least some of the ports of the processor are determined as target ports.

[0068] The maximum output current for each port is the maximum output current of any backlight chip connected to that port.

[0069] One specific implementation of step S210 above can be as follows: Based on the condition that the sum of the maximum output currents corresponding to all target ports is greater than or equal to the target current, and the sum of the maximum output currents corresponding to any first target number of target ports is less than the target current, at least a portion of all ports are determined as target ports. Here, the first target number is obtained by subtracting 1 from the number of target ports.

[0070] For example, if the first quantity is set to 3, then there are 3 chipsets. Each chipset includes 3 backlight chips connected in parallel. The maximum output current of each backlight chip is 10 amps, and the maximum output voltage is 2 volts. The processor then has 3 ports, each with a maximum output current of 10 amps and a maximum output voltage of 2 volts. If the target voltage is 2 volts and the target current is 18 amps, since the sum of the maximum output currents of the two ports is 20 amps, which is greater than the target current, and the sum of the maximum output currents of any one port is 10 amps, which is less than the target current, any two of the three ports can be designated as the target ports.

[0071] S220 determines every port of the processor other than the target port as a non-target port.

[0072] Specifically, within the same chipset, each backlight chip is connected in parallel with all other backlight chips and then connected to the backlight of the corresponding LCD screen. The maximum output voltage can be the rated maximum voltage of the corresponding backlight chip or a preset maximum voltage, and the maximum output current can be the rated maximum current of the corresponding backlight chip or a preset maximum current.

[0073] In another possible implementation, each backlight chip is connected in series with every other backlight chip in the same chipset; the maximum output current of backlight chips belonging to the same chipset is the same and greater than or equal to the target current.

[0074] Based on this, step S200 above includes the following steps:

[0075] S230, based on the fact that the sum of the maximum output voltages corresponding to all target ports is greater than or equal to the target voltage, at least some of the ports among the several ports are determined as target ports.

[0076] The maximum output voltage for each port is the maximum output voltage of any backlight chip connected to that port.

[0077] Specifically, if each backlight chip is connected in series with every other backlight chip in its chipset, then turning off any backlight chip means adjusting that backlight chip to a short-circuit state.

[0078] One specific implementation of step S230 above can be as follows: Based on the condition that the sum of the maximum output voltages corresponding to all target ports is greater than or equal to the target voltage, and the sum of the maximum output voltages corresponding to any second target number of target ports is less than the target voltage, at least a portion of all ports are determined as target ports. Here, the second target number is obtained by subtracting 1 from the number of target ports.

[0079] For example, if the first quantity is set to 3, then there are 3 chipsets. Each chipset includes 3 backlight chips connected in series. The maximum output current of each backlight chip is 10 amps, and the maximum output voltage is 2 volts. The processor then has 3 ports, each with a maximum output current of 10 amps and a maximum output voltage of 2 volts. If the target voltage is 3 volts and the target current is 10 amps, since the sum of the maximum output voltages of the two ports is 4 volts, which is greater than the target voltage, and the sum of the maximum output voltages of any one port is 2 volts, which is less than the target voltage, any two of the three ports can be designated as the target ports.

[0080] S240 determines every port of the processor other than the target port as a non-target port.

[0081] Specifically, within the same chipset, each backlight chip is connected in series with each other backlight chip to the backlight of the corresponding LCD screen.

[0082] Optionally, each LCD screen is identical.

[0083] Based on this, the display method further includes the following steps:

[0084] The S600, upon receiving a display request for the first time after startup, obtains the rated maximum voltage and rated maximum current of the LCD screen.

[0085] Specifically, step S600 begins execution upon receiving the first display request after startup, and it is not sequentially executed with steps S100-S500. For example, the startup in step S600 could be the processor powering on.

[0086] The above-mentioned response to the first display request received after startup can be the response to the first display request received each time the processor is powered on, or the response to the first display request received after the processor is powered on for the first time, etc. The embodiments of the present invention do not limit this.

[0087] S700 determines the maximum output current and maximum output voltage of each backlight chip based on the second preset conditions.

[0088] The second preset condition is that the maximum total current output to the LCD screen by all backlight chips connected to the LCD screen does not exceed the rated maximum current, and the maximum total voltage output to the LCD screen does not exceed the rated maximum voltage.

[0089] For example, if the first quantity is set to 3, then there are 3 chipsets. Each chipset includes 3 backlight chips connected in parallel. The rated maximum output current of each backlight chip is 10 amps, and the rated maximum output voltage is 2 volts. The rated maximum current of the LCD screen is 15 amps, and the rated maximum voltage is 1 volt. Therefore, the maximum output current of each backlight chip can be set to 5 amps, and the maximum output voltage can be set to 1 volt. Subsequently, for each backlight chip, its corresponding application can write the maximum output current and maximum output voltage of that backlight chip into its register via the bus.

[0090] Therefore, the maximum output current and maximum output voltage can limit the current and voltage output from the backlight chip to the corresponding LCD screen, thereby providing overcurrent and overvoltage protection for the LCD screen and reducing the possibility of damage to the LCD screen due to receiving excessive current or voltage.

[0091] Preferably, step S200 is executed after step S100 is completed and step S700 is completed.

[0092] Optionally, each LCD screen is identical.

[0093] Based on this, step S100 above includes the following steps:

[0094] S110, in response to receiving a display request, obtains display information.

[0095] S120 uses the voltage required for the LCD screen to display information as the target voltage and the current required for the LCD screen to display information as the target current.

[0096] Specifically, the displayed information includes brightness information.

[0097] One specific implementation of step S120 above can be to obtain the target voltage and target current required for the liquid crystal display screen to display at the brightness corresponding to the brightness information.

[0098] For example, for Figure 1 and Figure 2 For the corresponding display device, the following settings need to be made in the application corresponding to the backlight chip to enable the LCD screen to work properly:

[0099] First, add and register the backlight devices of the four backlight chip drivers to the device list through the device tree. Match the names with the same name in the owl_i2c_driver->of_match_table->complatibale field of the device list to realize the bus registration of LINUX. After the driver_match_device is successfully matched, register the i2c_adapter into the system so that each backlight chip driver is mounted under the corresponding bus.

[0100] Then, each backlight chip is initialized through the driver program, and the output voltage and current of the backlight chip are set according to the current power supply requirements. At the same time, the maximum output voltage and maximum output current of the backlight chip are saved and written into the register of the backlight chip. At this time, according to the power-on requirements of the corresponding LCD screen, the VDD pin, AVDD pin, RST pin, MIPI pin and backlight timing of the backlight chip are configured. Among them, the configuration of the MIPI pin includes the initialization code of the MIPI screen and the configuration of the MIPI signal.

[0101] When each LCD screen enters the final setup via the Displaylay bringup process, refer to... Figure 4 The schematic diagram of the LCD screen shows that the bias chip BiasIC and the display interface DSI are enabled sequentially (serial control via GPIO ports). Before the screen lights up, the processor intelligently calculates the target voltage required for the current brightness using the aforementioned application. Based on the current LCD screen settings, each backlight chip can coordinate with each other to output the corresponding power required by the LCD screen or enter sleep mode. Additionally, Figure 4 The LCD panel in the diagram is a liquid crystal display panel, DDIC is the driver, BacklightIC is any backlight chip corresponding to the liquid crystal display, IIC is the corresponding bus, and GPIO is the processor port.

[0102] The DISPLAY bringup process is as follows: Configure the IO pins according to the schematic; drive the bias chip; drive the backlight chip; pull the 1.8V pin high; send the MIPI signal; pull the data pin high; enable the backlight pin and finally light up the screen.

[0103] In addition, after the LCD screen is lit up according to the DISPLAY bringup process, the system enters the operable interface normally. Modify the interface of the backlight PWM driver, and simultaneously modify it to the specified interface of the backlight chip. In this way, the brightness can be intelligently adjusted through the normal Android backlight adjustment progress bar.

[0104] Furthermore, in this invention, a battery can be used directly to replace the backlight chip to power the backlight in the liquid crystal display screen, and other control chips can also be used to control the backlight.

[0105] While specific embodiments of the invention have been described in detail by way of example, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. It should also be understood that various modifications can be made to the embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A display device, characterized in that, The device includes a processor and a first number of chipsets; Each of the chipsets is identical, and each of the chipsets includes a second number of backlight chips, and each backlight chip in the same chipset is connected to an external liquid crystal display screen corresponding to the chipset. The processor includes the second number of ports, each of which is connected to the first number of identical backlight chips; Any two backlight chips connected to each of the aforementioned ports belong to different chipsets, and the number of ports connected to each of the aforementioned backlight chips is 1. Each of the ports is used to send the same control signal to each backlight chip connected to the port, and each of the liquid crystal displays is used to display according to the control signals received by all the backlight chips connected to the liquid crystal display. The processor is further configured to: in response to receiving a display request, acquire the target voltage and the target current; Based on the first preset condition, at least a portion of all ports are identified as target ports, and the remainder are identified as non-target ports; The first preset condition includes: the maximum total voltage provided by all backlight chips in the same chipset connected to the target port to the corresponding LCD screen is greater than or equal to the target voltage and the maximum total current is greater than or equal to the target current. The first preset condition also includes: any number of backlight chips belonging to the same chipset among all the backlight chips connected to the target ports provide a maximum total voltage to the LCD screen corresponding to the chipset that is less than the target voltage, or a maximum total current to the LCD screen corresponding to the chipset that is less than the target current; wherein, the number of targets is 1 less than the number of backlight chips belonging to the same chipset among all the backlight chips connected to the target ports. A shutdown signal is sent to the connected backlight chip through each non-target port, and an on signal and a target control signal corresponding to the target port are sent to the connected backlight chip through each target port, so that each liquid crystal display screen displays with the target voltage and target current. In the same chipset, each backlight chip is connected in parallel with each other backlight chip in the same chipset except itself, and the maximum output voltage of the backlight chips in the same group is the same, or they are connected in series and the maximum output current of the backlight chips in the same group is the same. The processor is further configured to: in response to receiving a display request for the first time after startup, obtain the rated maximum voltage and rated maximum current of the liquid crystal display screen; and determine the maximum output current and maximum output voltage of each backlight chip according to a second preset condition; The second preset condition is that the maximum total current output to the LCD screen by all backlight chips connected to the LCD screen does not exceed its rated maximum current, and the maximum total voltage does not exceed its rated maximum voltage.

2. The apparatus according to claim 1, characterized in that, Each of the aforementioned liquid crystal displays is identical.

3. The apparatus according to claim 1 or 2, characterized in that, Each of the backlight chips is identical.

4. A display system, characterized in that, The system includes the first number of liquid crystal displays and the display device as described in claim 1.

5. A display method, characterized in that, The method, applied to a processor of the display device according to any one of claims 1-3, comprises: In response to receiving a display request, acquire the target voltage and target current; According to a first preset condition, at least some of the ports of the processor are identified as target ports, and each port of the processor other than the target ports is identified as a non-target port; the first preset condition includes: the backlight chips connected to all the target ports that belong to the same chipset provide a maximum total voltage to the liquid crystal display screen corresponding to the chipset that is greater than or equal to the target voltage, and provide a maximum total current to the liquid crystal display screen corresponding to the chipset that is greater than or equal to the target current; A signal indicating that the corresponding backlight chip should be turned off is sent to each of the connected backlight chips through each of the non-target ports. Each target port sends a signal to each connected backlight chip to indicate that the corresponding backlight chip is turned on. Each target port is controlled to send a target control signal corresponding to the target port to each connected backlight chip, so that each liquid crystal display screen displays with the target voltage and the target current.

6. The method according to claim 5, characterized in that, The first preset condition also includes: Any number of backlight chips belonging to the same chipset among all the backlight chips connected to the target ports provide a maximum total voltage to the liquid crystal display screen corresponding to the chipset that is less than the target voltage, or a maximum total current to the liquid crystal display screen corresponding to the chipset that is less than the target current; the target number is 1 less than the number of backlight chips belonging to the same chipset among all the backlight chips connected to the target ports.

7. The method according to claim 5, characterized in that, Each of the backlight chips is connected in parallel with every other backlight chip in the same chipset; the maximum output voltage of the backlight chips belonging to the same chipset is the same and is greater than or equal to the target voltage. The step of determining at least a portion of the processor's ports as target ports and determining every port other than the target ports as non-target ports according to a first preset condition includes: Based on the fact that the sum of the maximum output currents corresponding to all the target ports is greater than or equal to the target current, at least a portion of all ports of the processor are determined as target ports; the maximum output current corresponding to each port is the maximum output current of any backlight chip connected to the port. Each port of the processor other than the target port is designated as a non-target port.

8. The method according to claim 5, characterized in that, Each of the backlight chips is connected in series with each other backlight chip in the same chipset; the maximum output current of the backlight chips belonging to the same chipset is the same and is greater than or equal to the target current. The step of determining at least a portion of the processor's ports as target ports and determining every port other than the target ports as non-target ports according to a first preset condition includes: Based on the fact that the sum of the maximum output voltages corresponding to all the target ports is greater than or equal to the target voltage, at least a portion of the ports are determined as target ports; the maximum output voltage corresponding to each port is the maximum output voltage of any backlight chip connected to the port. Each port of the processor other than the target port is designated as a non-target port.

9. The method according to claim 5, characterized in that, Each of the aforementioned liquid crystal displays is identical; The method further includes: Upon first receiving the display request after startup, the rated maximum voltage and rated maximum current of the liquid crystal display screen are obtained; According to the second preset condition, the maximum output current and maximum output voltage of each backlight chip are determined; the second preset condition is: the maximum total current output to the liquid crystal display screen by all backlight chips connected to the liquid crystal display screen does not exceed the rated maximum current, and the maximum total voltage output to the liquid crystal display screen does not exceed the rated maximum voltage.

10. The method according to claim 5, characterized in that, Each of the aforementioned liquid crystal displays is identical; The step of receiving a display request and acquiring the target voltage and target current includes: In response to receiving the display request, obtain display information; The voltage required for the liquid crystal display screen to display the displayed information is taken as the target voltage, and the current required for the liquid crystal display screen to display the displayed information is taken as the target current.

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