A liquid crystal panel and a method of controlling backlight brightness

Abstract

The embodiment of the present application provides a liquid crystal panel and a method for controlling backlight brightness, comprising: a backlight plate with backlight lamp beads, a plurality of driving modules for driving the backlight lamp beads in a partition mode, and a control module connected with the driving modules; the control module is provided with an IO interface, the IO interface is connected with the plurality of driving modules in series through first wires; the IO interface performs bidirectional data transmission with the plurality of driving modules through the first wires; the control module is connected with the plurality of driving modules in parallel through second wires; the control module sends common control signals to the plurality of driving modules through the second wires; the common control signals are used for indicating the data transmission direction between the IO interface and the plurality of driving modules and the brightness update of the backlight lamp beads driven by the plurality of driving modules synchronously, so that not only the number of the IO interfaces on the control module is reduced, but also the brightness update of the backlight lamp beads driven by the plurality of driving modules synchronously is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of display, in particular to a liquid crystal panel and a method for controlling backlight brightness. BACKGROUND

[0002] In recent years, liquid crystal display screens have been more and more widely used due to their low power consumption, thinness, soft picture and other advantages. However, since liquid crystals cannot emit light by themselves, they need to be combined with backlight panels to realize light emission. The structure of the backlight panel may cause the problem of impure black color of the liquid crystal screen.

[0003] At present, the problem of impure black color of the liquid crystal screen can be solved by partitioning the backlight panel, so that each region can independently control light. The liquid crystal display screen includes a control module and a plurality of driving modules, wherein the driving modules are used to receive the brightness information transmitted by the control module and drive the LED lamp beads to light up according to the brightness information. However, since the liquid crystal display screen is in a line-by-line scanning mode, there may be a delay problem when the control module transmits the brightness information to the plurality of driving modules, which may cause the LED lamp beads to be unable to light up synchronously, thereby affecting the viewing experience of users.

[0004] In summary, how to realize synchronous driving of the LED lamp beads to light up is a problem to be solved at present. SUMMARY

[0005] The embodiments of the present application provide a liquid crystal panel and a method for controlling backlight brightness, so as to solve the problem of delay when the control module transmits the brightness information to the plurality of driving modules in the prior art.

[0006] In a first aspect, the embodiments of the present application provide a liquid crystal panel, which includes a backlight panel having backlight lamp beads, a plurality of driving modules for driving the backlight lamp beads in a partitioned manner, and a control module connected with the driving modules; the control module is provided with an IO interface, the IO interface is connected with the plurality of driving modules in series through first wires; the IO interface performs bidirectional data transmission with the plurality of driving modules through the first wires; the control module is connected with the plurality of driving modules in parallel through second wires; the control module sends a common control signal to the plurality of driving modules through the second wires; the common control signal is used to indicate the data transmission direction between the IO interface and the plurality of driving modules and the brightness update of the plurality of driving modules for synchronously driving the backlight lamp beads.

[0007] In the embodiments of the present application, the IO interface performs bidirectional data transmission with the plurality of drive modules through the first wire, so that the number of IO interfaces on the control module is reduced without affecting data transmission, thereby reducing production cost and facilitating mass production. The common control signal is sent to the plurality of drive modules through the second wire, wherein the common control signal can not only indicate the data transmission direction between the IO interface and the plurality of drive modules, but also indicate the brightness update of the plurality of drive modules synchronously driving the backlight lamp beads, so that the number of IO interfaces on the control module is reduced, the cost of controlling the liquid crystal panel is reduced, and the plurality of drive modules can synchronously drive the brightness update of the backlight lamp beads.

[0008] In some embodiments of the present application, when the common control signal is at the first level, the indicated data transmission direction is from the IO interface to the plurality of drive modules; when the common control signal is at the second level, the indicated data transmission direction is from the plurality of drive modules to the IO interface; and when the common control signal changes from the first level to the second level, the plurality of drive modules synchronously drive the brightness update of the backlight lamp beads.

[0009] In the embodiments of the present application, the level of the control signal can control the data transmission direction between the IO interface and the plurality of drive modules, so that the number of IO interfaces can be reduced, the brightness information can be transmitted to the plurality of drive modules, and the plurality of drive modules can synchronously drive the brightness update of the backlight lamp beads.

[0010] In some embodiments of the present application, the second wire is a power line.

[0011] In the embodiments of the present application, when the second wire is a power line, the number of wires on the control module is reduced, thereby reducing the cost of the control module and facilitating mass production of the liquid crystal panel.

[0012] In some embodiments of the present application, the first level is a high level and the second level is a low level.

[0013] In some embodiments of the present application, the drive module is configured to transmit its own state information to the IO interface through the first wire in series after a set time length after the first level changes to the second level.

[0014] In the embodiments of the present application, after the first level changes to the second level for a set time length, the data transmission direction between the IO interface and the plurality of drive modules changes to from the plurality of drive modules to the IO interface, so that the plurality of drive modules transmits its own state information to the control module through the IO interface.

[0015] In a second aspect, the embodiments of the present application provide a method for controlling backlight brightness, comprising: a control module acquiring image partition brightness information corresponding to a plurality of driving modules of a liquid crystal panel respectively; a first wire and a second wire being arranged between the control module and the plurality of driving modules; the first wire connecting an IO interface of the control module and the plurality of driving modules in series; the second wire connecting the control module and the plurality of driving modules in parallel; the control module sending a first common control signal to the plurality of driving modules through the second wire; the first common control signal being used for indicating that a data transmission direction of the first wire is from the IO interface to the plurality of driving modules; the control module transmitting the image partition brightness information corresponding to the plurality of driving modules respectively to corresponding driving modules through the first wire; the control module sending a second common control signal to the plurality of driving modules through the second wire after a frame transmission duration; and change information of the first common control signal to the second common control signal indicating that the plurality of driving modules synchronously drive brightness update of backlight lamp beads according to the corresponding image partition brightness information.

[0016] In the embodiments of the present application, two wires are arranged on the control module and the plurality of driving modules, and the control module sends a common control signal through the second wire. When the common control signal is a first common control signal, a transmission direction of the first wire between the control module and the plurality of driving modules is from the IO interface to the plurality of driving modules, so that the control module transmits the brightness information to the plurality of driving modules through the first wire. When the common control signal is a second common control signal, the common control signal changes from the first common control signal to the second common control signal, and the change information is used for indicating that the driving modules synchronously drive brightness update of backlight lamp beads according to the corresponding image partition brightness information, so as to realize synchronous driving of brightness update of the backlight lamp beads.

[0017] In some embodiments of the present application, the control module receives self-state information sent by the plurality of driving modules through the first wire, and the second common control signal is used for indicating that a data transmission direction of the first wire is from the plurality of driving modules to the IO interface.

[0018] In the embodiments of the present application, the second common control signal is sent, so as to realize adjustment of the data transmission direction of the first wire, and the control module receives the self-state information sent by the plurality of driving modules through the first wire.

[0019] In a third aspect, the embodiment of the present application further provides a method for controlling backlight brightness, comprising: a driving module receiving a first common control signal sent by a control module through a second wire; the first common control signal is used for indicating that the data transmission direction of a first wire is from an IO interface of the control module to the driving modules; the first wire connects the IO interface of the control module and the driving modules in series; the driving module receives the image partition brightness information corresponding to the driving module sent by the control module through the first wire; after the driving module receives a second common control signal sent by the control module through the second wire, the brightness of the backlight lamp beads is synchronously driven according to the corresponding image partition brightness information.

[0020] In the embodiment of the present application, two wires are arranged on the control module and the driving modules, the control module sends a common control signal through the second wire, when the common control signal is a first common control signal, the transmission direction of the first wire between the control module and the driving modules is from the IO interface to the driving modules, so that the control module transmits the brightness information to the driving modules through the first wire. When the common control signal is a second common control signal, the common control signal changes from the first common control signal to the second common control signal, the change information is used for indicating that the driving module synchronously drives the brightness of the backlight lamp beads according to the corresponding image partition brightness information, so as to realize the synchronous driving of the brightness of the backlight lamp beads.

[0021] In some embodiments of the present application, the driving module transmits the state information of itself to the IO interface through the first wire in series after the first common control signal changes to the second common control signal for a set time length.

[0022] In a fourth aspect, the embodiment of the present application further provides an electronic device, comprising at least one processor and at least one memory, wherein the memory stores a computer program, when the program is executed by the processor, the processor executes the method for controlling backlight brightness in the first aspect.

[0023] In a fifth aspect, the embodiment of the present application further provides a computer readable storage medium, the storage medium stores a program, when the program runs on the computer, the computer realizes the method for controlling backlight brightness in the first aspect. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A schematic diagram of a display interface of a liquid crystal display provided by the embodiment of the present application;

[0025] Figure 2 A circuit diagram for adjusting the brightness of a backlight provided by the embodiment of the present application;

[0026] Figure 3 Another circuit diagram for adjusting the brightness of the backlight provided by the embodiment of the present application;

[0027] Figure 4 A structural schematic diagram of a liquid crystal panel provided by the embodiment of the present application;

[0028] Figure 5 A structural schematic diagram between the control module and the driving module provided by the embodiment of the present application;

[0029] Figure 6 A schematic diagram of data transmission direction between the control module and the driving module provided by the embodiment of the present application;

[0030] Figure 7 Another schematic diagram of data transmission direction between the control module and the driving module provided by the embodiment of the present application;

[0031] Figure 8 A flow chart of a method for controlling the brightness of the backlight provided by the embodiment of the present application;

[0032] Figure 9 A schematic diagram for adjusting the level of the common control signal provided by the embodiment of the present application;

[0033] Figure 10 A structural schematic diagram of an electronic device provided by the embodiment of the present application. DETAILED DESCRIPTION

[0034] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0035] As shown in Figure 1 , a schematic diagram of a display interface of a liquid crystal display provided by the embodiment of the present application. In recent years, the liquid crystal display is widely applied in various fields due to its low power consumption, thinness, soft picture and no harm to eyes. However, the liquid crystal itself cannot emit light, and needs to be combined with a backlight to realize light emission. In a possible case, since the liquid crystal display is in a working state, the entire backlight surface is emitting light, and therefore, the liquid crystal display has the problem of impure black color.

[0036] As shown in Figure 2 , a circuit diagram for adjusting the brightness of the backlight provided by the embodiment of the present application. The circuit diagram includes a control module, a driving module, a backlight and backlight lamp beads (inFigure 2 The backlight panel is divided into N rows, M columns, a total of N*M regions, and each driving module controls the brightness of the backlight lamp beads in a region. The control module is used to send brightness information to the N*M driving modules. The driving module is used to control the brightness of the backlight lamp beads in the corresponding region according to the brightness information. It should be noted that N and M are positive integers, wherein N and M can be pre-set or determined according to specific conditions, which are not limited here. The more IO interfaces on the control module, the higher the corresponding cost will be. Therefore, in order to control the cost, there are a total of N IO interfaces on the control module, wherein the IO interface is used to serially transmit the brightness information to each driving module in the row. Each driving module in each row is connected in series.

[0037] For example, taking the first row of the backlight panel as an example, wherein the first row has N driving modules, the IO interface on the control module corresponds to two wires, namely wire 1 and wire 2, which are used for data transmission. In order to realize that the backlight lamp beads in the same row can be lit synchronously, the control module first needs to set the address information of the first row driving module. Specifically, the control module determines the address information of the N driving modules in the first direction through the wire 1 corresponding to the 1_out interface of the IO interface, and after determining the address information of the N driving modules, the Nth driving module transmits the address information of the N driving modules to the control module in the second direction through the wire 2 corresponding to the 1_In interface of the IO interface. Secondly, the control module transmits the brightness information to the N driving modules in the first direction through the wire 1 corresponding to the 1_out interface according to serial transmission. The 1_In interface of the IO interface transmits the state information of the N driving modules to the control module in the second direction according to serial transmission. Since the liquid crystal display is scanned row by row, in order to avoid black spots during display of the liquid crystal display, it is necessary to ensure that the backlight in the same row is lit simultaneously according to the brightness information. However, due to the limitation of the IO interface, the IO interface cannot transmit the brightness information to the N driving modules in the same row at the same time, so the brightness information of the N driving modules in the same row cannot be transmitted simultaneously, which affects the display effect of the liquid crystal display. Figure 2In a system where driver modules in the same row transmit data serially, a delay needs to be added to each driver module to ensure that all backlight LEDs in the same row light up simultaneously. For example, if the first row contains five driver modules, the brightness information is transmitted sequentially from the first to the fifth driver module. The control module first transmits the brightness information serially to the first driver module. The first driver module then retrieves its own brightness information from the brightness information based on its address and stores its corresponding status information. It then serially transmits the brightness information to the second driver module, and so on, until the fourth driver module retrieves its own brightness information from the brightness information based on its address and stores its corresponding status information. The brightness information is then transmitted to the fifth driver module, which retrieves its own brightness information from the brightness information based on its address and stores its corresponding status information. As can be seen, the first driver module obtains its own brightness information before the second, the second before the third, the third before the fourth, and the fourth before the fifth. Therefore, to ensure that the backlight LEDs in the same row can light up synchronously, a delay needs to be added to each driver module. Since the first driver module obtains its brightness information earliest, the delays added to different driver modules are different. Specifically, the delay on the first driver module is the largest, and then the delay decreases sequentially according to the direction of brightness information transmission until the delay on the fifth driver module is the smallest. However, because the value of the delay is relatively complex, it is difficult to synchronize the timing of the backlight LEDs in the same row by setting the delay. This method can cause black spots on the display screen, thus reducing the user's viewing experience.

[0038] like Figure 3 The diagram shown is another circuit diagram for adjusting the brightness of a backlight panel according to an embodiment of the present invention. This circuit diagram includes a control module, a drive module, a backlight panel, and backlight LEDs (in...). Figure 3 (Not shown in the image). Figure 3 The control module in the middle has two IO interfaces on each row of driver modules, because Figure 2 The control module in the code corresponds to one I / O interface on each row of driver modules, therefore... Figure 3 Compare Figure 2 On average, each driver module in the middle has one more I / O interface, which means that... Figure 3 The cost of the control module will be higher thanFigure 2 The cost of the control module is relatively high. The backlight panel is divided into N rows and M columns, totaling N*M areas. Each driver module controls the brightness of the backlight LEDs in one area. The control module has 2N I / O interfaces: the first I / O interface and the second I / O interface. The first I / O interface has two traces, trace 3 and trace 4, and the second I / O interface has one trace, trace 5. To achieve timing synchronization of the backlight LEDs in the same row, the control module first needs to set the address information of the driver modules in the first row. Specifically, the control module uses trace 3 corresponding to the 1_outA interface of the first I / O interface to determine the address information of the N driver modules sequentially in the third direction. After determining the address information of the N driver modules, the Nth driver module transmits the address information of the N driver modules to the control module in the fourth direction through trace 4 corresponding to the 1_in interface of the first I / O interface. Next, the control module transmits the brightness information to the N driver modules in parallel through trace 5 corresponding to the 1_outB interface of the second I / O interface. Because the control module transmits brightness information to N drive modules in a parallel transmission manner, the backlight beads in the same row can be lit up synchronously.

[0039] In this embodiment of the invention, although Figure 2 The control module in the circuit diagram is relatively inexpensive, but the determination of the time delay is more complex and prone to errors, which can cause the LRD LEDs in the same row to fail to light up synchronously. Figure 3 The circuit diagram in the paper adds an IO interface to each row of the backlight board on the control module, so that the backlight beads in the same row can be lit synchronously by transmitting brightness information in parallel. However, the addition of more IO interfaces to the control module will result in a higher cost for the control module.

[0040] In summary, the embodiments of the present invention provide a liquid crystal panel that can solve the problem of... Figure 2 The problem of LRD LEDs in the same row not being able to light up synchronously due to time delay can also be solved. Figure 3 The increased cost of the control module is due to the addition of more I / O interfaces.

[0041] like Figure 4The diagram shown is a structural schematic of a liquid crystal panel provided in an embodiment of the present invention. The liquid crystal panel 400 includes a backlight plate 410 with backlight LEDs, multiple driving modules 420 that drive the backlight LEDs in a zoned manner, and a control module 430 connected to the driving modules. The control module 430 is provided with an I / O interface, which is connected in series to the multiple driving modules 420 via a first trace. The I / O interface performs bidirectional data transmission with the multiple driving modules 420 via the first trace. The control module 430 is connected in parallel to the multiple driving modules 420 via a second trace. The control module 430 sends a common control signal to the multiple driving modules 420 via the second trace. The common control signal is used to indicate the data transmission direction between the I / O interface and the multiple driving modules 420, and to synchronously update the brightness of the backlight LEDs driven by the multiple driving modules.

[0042] In this embodiment, the IO interface transmits data bidirectionally to multiple driver modules via a first trace. This reduces the number of IO interfaces on the control module without affecting data transmission, thereby lowering production costs and facilitating mass production. A common control signal is sent to multiple driver modules via a second trace. This common control signal not only indicates the data transmission direction between the IO interface and the multiple driver modules but also instructs the multiple driver modules to synchronously update the brightness of the backlight LEDs. This not only reduces the number of IO interfaces on the control module and lowers the cost of controlling the LCD panel but also enables multiple driver modules to synchronously update the brightness of the backlight LEDs.

[0043] like Figure 5 The diagram shown illustrates the structure between a control module and a drive module according to an embodiment of the present invention. The I / O interface transmits data bidirectionally to multiple drive modules via a first trace. It should be noted that the first data transmission direction is from the I / O interface to the multiple drive modules, and the second data transmission direction is from the multiple drive modules to the I / O interface. Because the data transmission between the I / O interface and the multiple drive modules is bidirectional, the number of I / O interfaces on the control module is reduced without affecting data transmission, thereby reducing production costs and facilitating mass production. A common control signal is sent to the multiple drive modules via a second trace. This common control information not only indicates the data transmission direction between the I / O interface and the multiple drive modules but also instructs the multiple drive modules to synchronously update the brightness of the backlight LEDs. This not only reduces the number of I / O interfaces on the control module and lowers the cost of controlling the LCD panel but also enables multiple drive modules to synchronously update the brightness of the backlight LEDs.

[0044] The following section details how to use common control signals to indicate the data transmission direction between the IO interface and multiple driver modules, and how to instruct multiple driver modules to synchronously drive the backlight LEDs to update their brightness.

[0045] When the common control signal is the first level, the indicated data transmission direction is from the IO interface to the plurality of driving modules, which can be seen from Figure 6 When the common control signal is the second level, the indicated data transmission direction is from the plurality of driving modules to the IO interface, which can be seen from Figure 7 When the common control signal changes from the first level to the second level, the plurality of driving modules are instructed to synchronously drive the brightness update of the backlight lamp beads, and the control module sends the common control signal to the plurality of driving modules through the second wire, so as to realize the synchronous driving of the plurality of driving modules to the brightness update of the backlight lamp beads.

[0046] For example, if the first row has N driving modules, in order to realize the timing synchronization of the backlight lamp beads in the same row, the control module needs to set the address information of the first row driving modules. Specifically, the control module adjusts the level of the common control signal to the first level. When the common control signal is at the first level, the indicated data transmission direction is from the IO interface to the plurality of driving modules. The control module determines the address information of the N driving modules in turn through the first wire of the IO interface according to the data transmission direction from the IO interface to the plurality of driving modules. Since the number of driving modules is known, the time for determining the address information of the N driving modules in turn through the first wire is less than the first time interval. After the first time interval, the control module adjusts the level of the common control signal to the second level. When the common control signal is at the second level, the indicated data transmission direction is from the plurality of driving modules to the IO interface. The control module transmits the address information of the N driving modules to the control module through the first wire of the IO interface according to the data transmission direction from the plurality of driving modules to the IO interface. Similarly, since the number of driving modules is known, the time for transmitting the address information of the N driving modules to the control module through the first wire is less than the second time interval. After the second time interval, the control module adjusts the level of the common control signal to the first level. The control module transmits the brightness information to the N driving modules in turn through the first wire of the IO interface according to the data transmission direction from the IO interface to the plurality of driving modules. Since the number of driving modules is known, the time for transmitting the brightness information to the N driving modules in turn through the first wire is less than the third time interval. After the third time interval, the control module sends the common control signal to the N driving modules through the second wire. The control module changes the level of the common control signal from the first level to the second level, which is used to indicate that the N driving modules synchronously drive the brightness update of the backlight lamp beads. Specifically, since the control module connects the N driving modules in parallel through the second wire, the control module sends the common control signal to the plurality of driving modules through the second wire, so that the N driving modules can synchronously drive the brightness update of the backlight lamp beads. Since the number of driving modules is known, the time for transmitting the common control signal to the N driving modules in parallel through the second wire is estimated to be within the fourth time interval. After the fourth time interval, the interval is set for a long time, and the driving module transmits its state information to the control module through the first wire in series to the IO interface.

[0047] Optionally, if the second wire is a power line, the number of wires on the control module is reduced, thereby reducing the cost of the liquid crystal panel.

[0048] Optionally, if the first level is high and the second level is low, when the control module determines the common control signal as low, the control module sends the common control signal to the plurality of driving modules through the second wire, so that the N driving modules can synchronously drive the brightness update of the backlight lamp beads.

[0049] As shown in Figure 8 a method for controlling backlight brightness provided by the embodiment of the application, the method comprises the following steps:

[0050] In step 801, the control module acquires image partition brightness information corresponding to a plurality of driving modules of a liquid crystal panel respectively.

[0051] In the embodiment of the application, since the liquid crystal display screen is in a line-by-line scanning mode, in order to avoid black spots in the display process of the liquid crystal display screen, it is necessary to ensure that the backlight of the same line needs to be lighted simultaneously according to the brightness information. Therefore, in order to realize the simultaneous lighting of the backlight of the same line according to the brightness information, the control module first needs to acquire image partition brightness information corresponding to a plurality of driving modules of a liquid crystal panel respectively, wherein the control module and the plurality of driving modules are connected by a first wire and a second wire; the first wire connects the IO interface of the control module and the plurality of driving modules in series; and the second wire connects the control module and the plurality of driving modules in parallel.

[0052] In step 802, the control module sends a first common control signal to the plurality of driving modules through the second wire.

[0053] In the embodiment of the application, the control module sends a first common control signal to the plurality of driving modules through the second wire, wherein the first common control signal is used to indicate that the data transmission direction of the first wire is from the IO interface to the plurality of driving modules, and the plurality of driving modules are connected in series.

[0054] In step 803, the control module transmits image partition brightness information corresponding to the plurality of driving modules respectively to the corresponding driving modules through the first wire.

[0055] In the embodiment of the application, since the plurality of driving modules are connected in series and the IO interface of the control module is connected in series with the plurality of driving modules, the control module transmits the image partition brightness information corresponding to the plurality of driving modules in series to the corresponding driving modules through the first wire.

[0056] In step 804, the control module sends a second common control signal to the plurality of driving modules through the second wire after a frame transmission duration.

[0057] In the embodiment of the present application, the control module sends the second common control signal to the plurality of driving modules through the second wire after the frame transmission duration. The change information of the first common control signal to the second common control signal indicates that the plurality of driving modules synchronously drive the brightness update of the backlight lamp beads according to the corresponding image partition brightness information.

[0058] In step 805, the plurality of driving modules synchronously drive the brightness update of the backlight lamp beads according to the corresponding image partition brightness information.

[0059] As can be seen from the above steps 801 to 805, the control module and the plurality of driving modules are provided with two wires, and the control module sends the common control signal through the second wire. When the common control signal is the first common control signal, the transmission direction of the first wire between the control module and the plurality of driving modules is IO interface to the plurality of driving modules, so as to realize that the control module transmits the brightness information to the plurality of driving modules through the first wire. When the common control signal is the second common control signal, the common control signal changes from the first common control signal to the second common control signal, and the change information is used to indicate that the driving module synchronously drives the brightness update of the backlight lamp beads according to the corresponding image partition brightness information, so as to realize the synchronous driving of the brightness update of the backlight lamp beads.

[0060] In some embodiments of the present application, the transmission direction of the first wire between the control module and the plurality of driving modules is bidirectional transmission. Specifically, when the control module sends the first common control signal to the driving module, the transmission direction of the first wire between the control module and the plurality of driving modules is IO interface to the plurality of driving modules. The driving module receives the image partition brightness information corresponding to the driving module sent by the control module through the first wire. When the first common control signal of the driving module changes to the second common control signal, the transmission direction of the first wire between the control module and the plurality of driving modules is the plurality of driving modules to the IO interface. The plurality of driving modules transmit the state information of the plurality of driving modules to the IO interface in series through the first wire, which can be seen from Figure 9 .

[0061] Based on the same technical concept, the present application also provides an electronic device, as shown in Figure 10 The electronic device 1000 includes at least one processor 1001 and a memory 1002 connected with the at least one processor. In the embodiment of the present application, the specific connection medium between the processor 1001 and the memory 1002 is not limited, Figure 10 for example, the processor 1001 and the memory 1002 are connected through a bus. The bus can be divided into an address bus, a data bus, a control bus, etc.

[0062] In the embodiments of the present application, the memory 1002 stores instructions executable by the at least one processor 1001, and the at least one processor 1001 can execute the steps included in the foregoing method for controlling the brightness of the backlight by executing the instructions stored in the memory 1002.

[0063] The processor 1001 is the control center of the computing device, can connect various parts of the computing device through various interfaces and lines, and can realize data processing by running or executing the instructions stored in the memory 1002 and calling the data stored in the memory 1002. The processor 1001 can be a general-purpose processor, such as a central processing unit (CPU), a digital signal processor, an application specific integrated circuit (ASIC), a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can realize or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application.

[0064] The memory 1002 is a non-volatile computer readable storage medium, which can be used to store non-volatile software programs, non-volatile computer executable programs and modules. The memory 1002 can include at least one type of storage medium, such as flash memory, hard disk, multimedia card, card type memory, random access memory (RAM), static random access memory (SRAM), programmable read-only memory (PROM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), magnetic storage, magnetic disk, optical disk, etc.

[0065] Based on the same technical concept, the embodiments of the present application also provide a computer readable storage medium storing a computer program executable by a computing device, which, when the program is running on an electronic device, causes the electronic device to execute the steps of the foregoing method for controlling the brightness of the backlight.

[0066] Those skilled in the art will appreciate that embodiments of the present application can be readily used as software, hardware, or a combination of software and hardware. In one

[0067] The present application is described in reference to the flow diagrams and / or block diagrams of the methods, apparatus (systems) and computer program products according to this application. It will be understood that each block of the flow diagrams and / or block diagrams, and combinations of blocks in the flow diagrams and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flow diagrams and / or block diagrams block or blocks. Figure 1 The flow diagrams and / or block diagrams in the present application can also be implemented by computer-usable or computer-readable program instructions. Such computer-usable or computer-readable program instructions can be written in any of a number of suitable programming languages and / or programming or scripting tools and then compiled as necessary. Figure 1 The means can be realized by one or more digital electronic circuits, by computer hardware, by software, by firmware, or by a combination of them and their concurrent use. The present application includes a computer program product applicable to a computer-usable or computer-readable storage medium having instructions, data, and / or code stored thereon.

[0068] These computer program instructions can also be stored in a computer- readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the flow diagrams and / or block diagrams block or blocks. Figure 1 The flow diagrams and / or block diagrams in the present application can also be implemented by computer-usable or computer-readable program instructions. Such computer-usable or computer-readable program instructions can be written in any of a number of suitable programming languages and / or programming or scripting tools and then compiled as necessary. Figure 1 The means can be realized by one or more digital electronic circuits, by computer hardware, by software, by firmware, or by a combination of them and their concurrent use. The present application includes a computer program product applicable to a computer-usable or computer-readable storage medium having instructions, data, and / or code stored thereon.

[0069] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the flow diagrams and / or block diagrams block or blocks. Figure 1 The flow diagrams and / or block diagrams in the present application can also be implemented by computer-usable or computer-readable program instructions. Such computer-usable or computer-readable program instructions can be written in any of a number of suitable programming languages and / or programming or scripting tools and then compiled as necessary. Figure 1 The means can be realized by one or more digital electronic circuits, by computer hardware, by software, by firmware, or by a combination of them and their concurrent use. The present application includes a computer program product applicable to a computer-usable or computer-readable storage medium having instructions, data, and / or code stored thereon.

[0070] While the preferred embodiments of the application have been described, additional variations and modifications can be employed by those skilled in the art once armed with the concepts reflected in the preferred embodiments. Therefore, the appended claims are intended to cover all such variations and modifications as falling within the scope of the application.

[0071] Obviously, many modifications and variations of the present application are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A liquid crystal panel, characterized by, The application relates to a backlight panel with backlight beads, a plurality of driving modules for driving the backlight beads in a partition mode, and a control module connected with the driving modules. The control module is provided with an IO interface, the IO interface is connected with the plurality of driving modules in series through first wires, and the IO interface and the plurality of driving modules perform bidirectional data transmission through the first wires. The control module is connected with the plurality of driving modules in parallel through second wires. The control module sends common control signals to the plurality of driving modules through the second wires, the common control signals are used for indicating the data transmission direction between the IO interface and the plurality of driving modules and the brightness update of the backlight beads driven by the plurality of driving modules in a synchronous mode. When the common control signals are at a first level, the indicated data transmission direction is from the IO interface to the plurality of driving modules. When the common control signals are at a second level, the indicated data transmission direction is from the plurality of driving modules to the IO interface. When the common control signals change from the first level to the second level, the brightness update of the backlight beads driven by the plurality of driving modules in a synchronous mode is indicated. The second wires are power lines. The first level is a high level, and the second level is a low level.

2. The liquid crystal panel according to claim 1, wherein The driving modules are used for transmitting self-state information to the IO interface through the first wires in a series mode after a set time length after the first level changes to the second level.

3. The liquid crystal panel of claim 1, wherein, The control module obtains image partition brightness information corresponding to a plurality of driving modules of a liquid crystal panel respectively.

4. The liquid crystal panel of claim 1, wherein, The control module and the plurality of driving modules are connected with first wires and second wires; the first wires connect an IO interface of the control module and the plurality of driving modules in series; and the second wires connect the control module and the plurality of driving modules in parallel.

5. A method of controlling backlight brightness, characterized by, The control module sends first common control signals to the plurality of driving modules through the second wires; and the first common control signals are used for indicating that the data transmission direction of the first wires is from the IO interface to the plurality of driving modules. The control module transmits the image partition brightness information corresponding to the plurality of driving modules respectively to the corresponding driving modules through the first wires. The control module sends second common control signals to the plurality of driving modules through the second wires after a frame transmission time length; and the change information from the first common control signals to the second common control signals indicates that the plurality of driving modules drive the brightness update of the backlight beads in a synchronous mode according to the corresponding image partition brightness information. The control module receives self-state information of the plurality of driving modules through the first wires. The second common control signals are used for indicating that the data transmission direction of the first wires is from the plurality of driving modules to the IO interface. The driving modules receive the first common control signals sent by the control module through the second wires.

6. The method of claim 5, wherein, ​ ​ ​ 7. A method of controlling backlight brightness, characterized by, ​ ​ The first common control signal is used to indicate that the data transmission direction of the first wire is from the IO interface of the control module to the plurality of driving modules; the first wire connects the IO interface of the control module and the plurality of driving modules in series; and the second wire connects the control module and the plurality of driving modules in parallel. The driving module receives the image partition luminance information corresponding to the driving module sent by the control module through the first wire. After receiving the second common control signal sent by the control module through the second wire, the driving module synchronously drives the luminance update of the backlight lamp beads according to the corresponding image partition luminance information.

8. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The processor implements the steps of the method in any one of claims 5 to 7 when executing the program.

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