LED backlight driving signal bridging circuit, LED driving unit and LED backlight system

Abstract

The invention relates to the technical field of LED display screens, and discloses an LED backlight driving signal bridging circuit, an LED driving unit and an LED backlight system.The circuit can be applied to the LED backlight system and can comprise a subordinate controller used for receiving first LED control data; the synchronizing signal input and output end is used for receiving a synchronizing signal; the data remapper is used for converting the first LED control data into second LED control data; the port selection module is electrically connected with the plurality of output signal ports and is used for distributing different sub-signals to the corresponding output signal ports. Therefore, the LED driving unit is controlled in a signal bridging mode, the system architecture of the LED backlight system is simplified, and meanwhile the overall efficiency of the system is improved. According to the invention, only functional modules necessary for the backlight system are reserved, and the cost and the operation complexity of the system are reduced on the basis of ensuring the normal operation of the backlight system.

Description

Technical Field

[0001] The present invention relates to the technical field of LED display screens, and in particular to an LED backlight driving signal bridge circuit, an LED driving unit and an LED backlight system. Background Art

[0002] In the backlight panel products of LCD display applications, there are generally two types: the LED driving unit is directly driven by the image processing unit (SOC, picture quality enhancement chip, TCON chip, etc.), and the LED driving unit is driven by the driving control unit (MCU, Bcon, Dcon, CPU) after being processed by the image processing unit.

[0003] In the solution where the image processing unit directly drives the LED driver unit, there is the challenge of integrating the driver control unit into the image processing unit. Although this greatly reduces the system cost, it brings a new technical problem. Since the image processing unit needs to handle complex image tasks, its limited signal interface is difficult to meet the multi-channel transmission requirements of the backlight signal. Current and future image processing units must transmit data from as many partitions as possible through very few signal interfaces, which has become a key challenge in our backlight application design. If the current image processing unit needs to support more partitions or more signal groups, the chip must be redesigned. However, the internal architecture of such a large chip is extremely complex, and even a small change may involve the adjustment and verification of multiple modules, resulting in a lot of time and labor costs. In addition, chip revisions also need to go through a complete process from design to manufacturing, further increasing the development cycle and resource investment.

[0004] In addition, although removing the driver control unit can significantly reduce the cost of the entire machine, this approach also brings some practical problems. After removing the driver control unit, since key tasks such as mapping and data sorting and packaging rely on the image processing unit to complete, and the screen size, number of partitions, display effect and other requirements of each project are quite different, the image processing unit manufacturers need to invest a lot of human resources to reconfigure and match the corresponding parameters according to the specific needs of different projects. This process is not only cumbersome and complicated, but also requires repeated adjustments and tests to ensure that the effect of each project can achieve the expected goals. As a result, image processing unit manufacturers have to spend a lot of time and energy to handle these customized tasks, which greatly increases the implementation cycle and cost of the project.

[0005] In the solution where the LED driver unit is driven by the driver control unit after being processed by the image processing unit, the output signal is transmitted to the driver control unit, and its rich resources are used to optimize compatibility and interface functions, ensuring that the system has certain advantages in flexibility and scalability. However, due to the incomplete match between the design characteristics of the current driver control unit and the requirements of the backlight system, a large number of hardware resources are not fully utilized. In actual applications, the proportion of resource waste is as high as 80%.

[0006] In addition, there is a large overlap in the functions of the image processing unit and the drive control unit. Many tasks or functional modules can be completed by either of the two. This inefficient use of resources not only fails to bring out the performance of the drive control unit, but also causes redundancy in system design, seriously affecting the overall energy efficiency and system performance. Therefore, although this solution provides strong functional optimization, in actual applications, it fails to fully tap the potential of the drive control unit, resulting in unnecessary waste of resources and reduced efficiency.

[0007] Since the image processing unit itself needs to process a large amount of other data, the resources it provides to the backlight system are relatively limited. With the development of MINI LED technology, the functions required by the backlight system are increasing. After removing the driver control unit, many functional interfaces must be connected to the image processing unit. However, the image processing unit does not have enough additional interfaces and interrupt resources to handle these new functions, such as Mapping, VLED voltage feedback adjustment, etc. These functions need to occupy the interface and resources of the image processing unit, resulting in overall resource constraints. Due to this limitation, the existing solution to remove the driver control unit has poor energy efficiency and display effect.

[0008] Therefore, it is necessary to design a new LED backlight system to reduce the cost and operation complexity of the system while ensuring the normal operation of the backlight system. Summary of the invention

[0009] The present invention provides an LED backlight driving signal bridge circuit, an LED driving unit and an LED backlight system, which reduce the cost and operation complexity of the system while ensuring the normal operation of the backlight system.

[0010] In order to solve the above technical problems, the first aspect of the present invention discloses an LED backlight driving signal bridge circuit, the circuit comprising a slave controller, a synchronization signal input and output terminal, a data remapper, a port selection module and a plurality of output signal ports, wherein: The first end of the slave controller is used to receive the first LED control data, the second end of the slave controller is electrically connected to the first end of the data remapper, and the third end of the slave controller is electrically connected to the first end of the synchronization signal input and output end; The second end of the synchronization signal input and output end is used to receive a synchronization signal, and the slave controller transmits the first LED data to the data remapper in synchronization with the synchronization signal; The data remapper is used to convert the first LED control data into second LED control data, wherein the second LED control data is of a different type from the first LED control data, and the second end of the data remapper is electrically connected to the port selection module; The port selection module is electrically connected to the plurality of output signal ports, and is used for dividing the second LED control data into different sub-signals according to a preset data allocation mode, and then allocating the different sub-signals to corresponding output signal ports; The output signal port is used to send the corresponding sub-signal to the corresponding LED driving unit, and the sub-signal is used to control the corresponding LED driving unit, thereby realizing the corresponding backlight picture.

[0011] As an optional embodiment, in the first aspect of the present invention, the type of the first LED control data is one of an SPI signal, a QSPI signal, an IIC signal and a UART signal; the type of the second LED control data is one of a CDBP signal, a dual-line duplex / half-duplex signal, a single-line duplex / half-duplex signal, a single-line serial signal, and a series-parallel combination signal.

[0012] As an optional implementation, in the first aspect of the present invention, the circuit further includes a mapping register and a storage controller, wherein: A first end of the mapping register is electrically connected to a third end of the data remapper, and the mapping register is used to cache specific data in the data remapper; The storage controller is electrically connected to the second end of the mapping register, and the storage controller is used to control the mapping register to perform a cache operation on the specific data.

[0013] As an optional implementation manner, in the first aspect of the present invention, the specific operation manner of the data remapper converting the first LED control data into the second LED control data includes: parsing the first LED control data into a data frame according to a communication protocol of the first LED control data; Reorganizing the structure of the data frame into a structure corresponding to the second LED control data; Translating the content of the data frame into a format corresponding to the second LED control data; According to the communication protocol corresponding to the second LED control data, a frame header, a frame footer and check information are added to the data frame, and then the second LED control data is generated according to the timing and level of the communication protocol corresponding to the second LED control data.

[0014] As an optional implementation, in the first aspect of the present invention, the circuit further includes a digital-to-analog converter, a bandgap reference module and a feedback adjustment module, wherein: The bandgap reference module is electrically connected to the first end of the digital-to-analog converter, and the bandgap reference module is used to provide a reference voltage for the digital-to-analog converter; The second end of the digital-to-analog converter is electrically connected to the feedback regulation module, and the digital-to-analog converter is used to convert the digital signal into an analog signal and send it to the feedback regulation module; The feedback regulation module is used to receive the driving voltage feedback information of the LED light-emitting unit corresponding to each of the LED driving units, and dynamically generate an adjustment signal according to the analog signal and the feedback information, and the adjustment signal is used to adjust the driving voltage corresponding to each of the LED light-emitting units.

[0015] The second aspect of the present invention discloses an LED backlight system, the LED backlight system comprises an image processing unit, the LED backlight drive signal bridge circuit in the first aspect of the present invention, and a plurality of LED drive units, wherein: The image processing unit is used to generate first LED control data, and send the first LED control data to the LED backlight drive signal bridge circuit; Each of the output signal ports of the LED backlight driving signal bridge circuit is electrically connected to a corresponding LED driving unit, so that the output signal port sends a corresponding sub-signal to the corresponding LED driving unit; The LED driving unit is used to realize a corresponding backlight picture according to the sub-signal.

[0016] The third aspect of the present invention discloses a bridge-connected LED driving unit, the bridge-connected LED driving unit comprising a slave controller, a synchronization signal input and output terminal, a data remapper, a port selection module, a first port and a driving control module, wherein: The first end of the slave controller is used to receive the first LED control data, the second end of the slave controller is electrically connected to the first end of the data remapper, and the third end of the slave controller is electrically connected to the first end of the synchronization signal input and output end; The second end of the synchronization signal input and output end is used to receive a synchronization signal, and the slave controller transmits the first LED data to the data remapper in synchronization with the synchronization signal; The data remapper is used to convert the first LED control data into second LED control data, wherein the second LED control data is of a different type from the first LED control data, and the second end of the data remapper is electrically connected to the port selection module; The port selection module is electrically connected to a plurality of common LED driving units in a serial or parallel manner, and the port selection module is used to divide the second LED control data into different sub-signals according to a preset data allocation mode, and allocate the different sub-signals to the corresponding common LED driving units; The port selection module is also electrically connected to the first port, and the port selection module is used to distribute the first sub-signal in the second LED control data that matches the first port to the first port; The driving control module is electrically connected to the first port, and is used to control the operation of the corresponding LED light-emitting unit according to the first sub-signal.

[0017] As an optional implementation, in the third aspect of the present invention, the bridge-connected LED driving unit further includes a mapping register and a storage controller, wherein: A first end of the mapping register is electrically connected to a third end of the data remapper, and the mapping register is used to cache specific data in the data remapper; The storage controller is electrically connected to the second end of the mapping register, and the storage controller is used to control the mapping register to perform a cache operation on the specific data.

[0018] As an optional implementation manner, in the third aspect of the present invention, the specific operation of the data remapper converting the first LED control data into the second LED control data includes: parsing the first LED control data into a data frame according to a communication protocol of the first LED control data; Reorganizing the structure of the data frame into a structure corresponding to the second LED control data; Translating the content of the data frame into a format corresponding to the second LED control data; The communication protocol corresponding to the second LED control data adds a frame header, a frame footer and check information to the data frame, and then generates the second LED control data according to the timing and level of the communication protocol corresponding to the second LED control data.

[0019] The fourth aspect of the present invention discloses an LED backlight system with a signal bridging function, the system comprising an image processing unit, the bridge-containing LED driving unit in the third aspect of the present invention, and a plurality of ordinary LED driving units, wherein: The image processing unit is electrically connected to the bridge-containing LED driving unit, and the image processing unit is used to generate first LED control data and send the first LED control data to the bridge-containing LED driving unit; The bridge-connected LED driving unit is electrically connected to a plurality of common LED driving units in a serial or parallel manner, and is used to convert the first LED control data into second LED control data, divide the second LED control data into different sub-signals according to a preset data allocation mode, allocate the different sub-signals to the corresponding common LED driving units, and control the operation of the corresponding LED light-emitting unit according to the first sub-signal.

[0020] Compared with the prior art, the present invention has the following beneficial effects: The present invention designs an LED backlight driving signal bridge circuit, thereby controlling the LED driving unit by signal bridging, simplifying the system architecture of the LED backlight system, and improving the overall efficiency of the system. The solution only retains the functional modules required by the backlight system, and reduces the cost and operation complexity of the system while ensuring the normal operation of the backlight system.

[0021] On the other hand, the present invention further improves the integration of the system by integrating the signal bridge circuit with the LED driving unit. This design not only simplifies the system structure and reduces the number of components, but also significantly reduces the packaging cost and the complexity of later development and debugging. Among them, by integrating the signal bridge circuit with the LED driving unit, the overall architecture of the system is optimized, avoiding the redundant links of signal transmission and processing in the traditional solution, and further improving the efficiency and stability of signal processing. While achieving efficient signal transmission and processing, the integrated system also reduces the need for additional connections and interfaces, and reduces the physical space occupied by the system. In addition, the integrated solution greatly reduces the mutual coordination and communication links between multiple components in the traditional design, thereby simplifying the production and assembly process and reducing manufacturing costs. During the packaging and later development process, the overall development cycle is also shortened due to the reduction of coordination and debugging work of multiple components, which greatly improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a structural schematic diagram of an LED backlight driving signal bridge circuit disclosed in an embodiment of the present invention; Figure 2 is a structural schematic diagram of a MINILED backlight system disclosed in an embodiment of the present invention; Figure 3 It is a communication schematic diagram of the LED backlight driving signal bridge circuit and the image processing unit disclosed in the embodiment of the present invention; Figure 4 It is a communication schematic diagram of the LED backlight driving signal bridge circuit and the LED driving unit disclosed in the embodiment of the present invention; Figure 5 It is a schematic diagram of the internal structure of an LED backlight driving signal bridge circuit disclosed in an embodiment of the present invention; Figure 6 It is a structural schematic diagram of a bridge LED driving unit disclosed in an embodiment of the present invention; Figure 7 It is a structural schematic diagram of an LED backlight system with a signal bridging function disclosed in an embodiment of the present invention; Figure 8 It is a schematic diagram of the structure of an internal architecture including a bridge LED driving unit disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, device, product or end including a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units inherent to these processes, methods, products or ends.

[0026] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] It should be noted that, unless otherwise clearly specified and limited, the term "electrical connection" in the specification and claims of the present invention and the above-mentioned drawings should be understood in a broad sense. For example, it can be a fixed electrical connection, a detachable electrical connection, or an integral electrical connection; it can be a mechanical electrical connection, an electrical electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements.

[0028] Embodiment 1 like Figure 1 As shown, the first embodiment of the present invention discloses an LED backlight driving signal bridge circuit, which can be applied to an LED backlight system. Specifically, the circuit may include a slave controller 101, a synchronization signal input and output terminal 102, a data remapper 103, a port selection module 104 and a plurality of output signal ports 105, wherein: The slave controller 101, as a slave part in the control system of the chip, receives instructions from the master controller or other modules and performs corresponding operations, such as data transmission and processing. In the embodiment of the present invention, the first end of the slave controller 101 is used to receive the first LED control data, the second end of the slave controller 101 is electrically connected to the first end of the data remapper 103, and the third end of the slave controller 101 is electrically connected to the first end of the synchronization signal input and output end 102. The first LED control data includes a variety of control information, which is used to control the light-emitting state of the corresponding LED driving unit, such as whether to emit light, light brightness, etc.

[0029] The second end of the synchronization signal input and output terminal 102 is used to receive a synchronization signal, and the slave controller 101 transmits the first LED data to the data remapper 103 in synchronization with the synchronization signal; wherein the synchronization signal refers to a special type of signal used to coordinate operations between multiple devices, systems or processes, and its core function is to ensure the effective transmission and processing of data so that the receiver can correctly parse the information sent by the sender.

[0030] The data remapper 103 is used to convert the first LED control data into the second LED control data, wherein the second LED control data is of a different type from the first LED control data, and the second end of the data remapper 103 is electrically connected to the port selection module 104. Optionally, the type of the first LED control data is one of an SPI signal, a QSPI signal, an IIC signal, and a UART signal, and the second LED control data is one of a CDBP signal, a two-line duplex / half-duplex signal, a single-line duplex / half-duplex signal, a single-line serial signal, and a serial-parallel combination signal. In the embodiment of the present invention, by converting the data type, the image processing unit of the LED backlight product does not need to be specially adapted for each protocol, and the signal bridge circuit can convert the first LED control data into the required type of second LED control data, thereby simplifying the complexity of the system and improving the compatibility of the system.

[0031] The port selection module 104 is electrically connected to a plurality of output signal ports 105. The port selection module 104 is used to divide the second LED control data into different sub-signals according to a preset data allocation mode, and then allocate the different sub-signals to the corresponding output signal ports 105; optionally, the port selection module 104 can select one or several paths of the input data as sub-signals for output according to preset conditions or control signals, and allocate the sub-signals to different output ports.

[0032] The output signal port 105 is used to send the corresponding sub-signal to the corresponding LED driving unit, and the sub-signal is used to control the corresponding LED driving unit, so as to realize the corresponding backlight picture.

[0033] In the embodiment of the present invention, an LED backlight driving signal bridge circuit is designed, so that the LED driving unit is controlled by signal bridging, which simplifies the system architecture of the LED backlight system and improves the overall efficiency of the system. This solution only retains the functional modules required by the backlight system, and reduces the cost and operation complexity of the system while ensuring the normal operation of the backlight system.

[0034] In an optional embodiment, the circuit may further include a mapping register and a storage controller, wherein: A first terminal of the mapping register is electrically connected to a third terminal of the data remapper 103, and the mapping register is used to cache specific data in the data remapper 103; The storage controller is electrically connected to the second end of the mapping register, and the storage controller is used to control the mapping register to perform a cache operation of specific data.

[0035] In another optional embodiment, the specific operation of the data remapper 103 converting the first LED control data into the second LED control data may include: Parsing the first LED control data into a data frame according to a communication protocol of the first LED control data; Reorganize the structure of the data frame into a structure corresponding to the second LED control data; Translate the content of the data frame into a format corresponding to the second LED control data; According to the communication protocol corresponding to the second LED control data, a frame header, a frame footer and check information are added to the data frame, and then the second LED control data is generated according to the timing and level of the communication protocol corresponding to the second LED control data.

[0036] In the embodiment of the present invention, the conversion and distribution of signals are the core functions of the signal bridging circuit, and the above operations may specifically include: S1. Receive signal (1) Receiving: receiving the preset protocol signal and parsing it into digital form; (2) Decoding: The received signal is parsed into data frames according to the format of the communication protocol (such as frame structure, check bit, data bit, etc.). It mainly involves the following actions: synchronization (finding the starting position of the signal, such as the frame header), verification (verifying the integrity and accuracy of the received data such as CRC verification), and extracting the payload (extracting specific data information); S2. Signal processing and data conversion (1) Data cache: The decoded data is stored in the mapping register; (2) Data processing: Perform necessary data processing through internal logic hardware circuits. This mainly involves: format conversion (reorganizing the data structure), protocol conversion (translating the protocol content of the first LED control data into the format required by the second LED control data), and data processing (adding timestamps, encryption, decryption, encoding, etc.).

[0037] S3. Generate signal (1) Protocol encoding: Pack the data into the protocol format of the second LED control data according to the specification of the second LED control data. This mainly involves: adding a frame header and a frame footer, inserting checksum information, and generating data according to the timing and level requirements of the target protocol; (2) Convert digital signals into physical signals: for example, convert digital signals into analog signals, drive outputs of different high and low levels, etc. S4. Send signal (1) Output interface: Send the signal through the physical interface corresponding to the target protocol; (2) Timing control: Ensure that the transmission timing matches the requirements of the target protocol, such as baud rate, frame interval, synchronization signal, etc.

[0038] In yet another optional embodiment, the circuit may further include a digital-to-analog converter, a bandgap reference module, and a feedback adjustment module, wherein: The bandgap reference module is electrically connected to the first end of the digital-to-analog converter, and the bandgap reference module is used to provide a reference voltage for the digital-to-analog converter; The second end of the digital-to-analog converter is electrically connected to the feedback regulation module, and the digital-to-analog converter is used to convert the digital signal into an analog signal and send it to the feedback regulation module; The feedback regulation module is used to receive the driving voltage feedback information of the LED light-emitting unit corresponding to each LED driving unit, and dynamically generate a regulation signal according to the analog signal and the feedback information, and the regulation signal is used to adjust the driving voltage corresponding to each LED light-emitting unit.

[0039] Specifically, this optional embodiment can monitor the driving voltage corresponding to the LED light-emitting unit in real time, and compare the collected voltage value with a set reference value, and generate a corresponding feedback signal based on the judgment result.

[0040] In this process, the digital-to-analog converter is responsible for converting digital signals into analog signals, while the feedback regulation module increases or decreases the regulation signal by different amplitudes according to the feedback information. Finally, the system power board can adjust the driving voltage according to the amplitude of the regulation signal to meet the needs of the backlight system and realize the dynamic voltage regulation function.

[0041] It should be noted that, in the embodiment of the present invention, the function of the port selection module is to optimize the distribution and transmission of brightness data. It will parse a whole packet of brightness data sent from the upstream, and split, reorganize and encapsulate it according to system requirements. The processed sub-signals are then distributed to different signal groups according to preset logic.

[0042] Embodiment 2 Embodiment 2 of the present invention discloses an LED backlight system, which may include an image processing unit, the LED backlight drive signal bridge circuit in Embodiment 1 of the present invention, and a plurality of LED drive units, wherein: The image processing unit is used to generate first LED control data and send the first LED control data to the LED backlight drive signal bridge circuit; Each output signal port 105 of the LED backlight driving signal bridge circuit is electrically connected to a corresponding LED driving unit, so that the output signal port 105 sends a corresponding sub-signal to the corresponding LED driving unit; The LED driving unit is used to realize the corresponding backlight picture according to the sub-signal.

[0043] Specifically, an optional embodiment of the present invention also discloses a MINILED backlight system, which controls the LED drive unit through a signal bridging method, simplifies the system architecture, and improves the overall efficiency of the system. This solution only retains the functional modules required by the backlight system, and while fully meeting all the functional requirements of the backlight system, significantly reduces the cost of the traditional drive control unit, and effectively reduces the hardware overhead, and has high application value and market prospects.

[0044] like Figure 2 As shown, the LED backlight drive signal bridge circuit communicates with the LED drive unit by signal bridge forwarding. Unlike the traditional drive control unit, the signal bridge circuit does not perform complex processing on the Local Dimming (LD) signal transmitted from the system end, but directly parses the signal through hardware and distributes it to each CDBP signal group. In this optional embodiment, the second LED control data is a CDBP signal. The number of CDBP signal groups can be 1 or more (N). This design not only effectively solves the problem of insufficient interfaces and internal resources when the image processing unit is directly driven, but is also more efficient and direct than traditional solutions in cumbersome operations such as signal analysis, internal algorithm processing and packaging.

[0045] At present, there are many types of MiniLED LED driving protocols, and almost all driving manufacturers have their own unique protocols. Due to the limitations of image processing unit manufacturers in architecture design and cost control, it is usually difficult to be compatible with all backlight port protocols. In the embodiment of the present invention, the introduction of the LED backlight driving signal bridge circuit effectively solves this problem. It can adapt to and be compatible with different backlight port protocols, so that the image processing unit does not need to be specially adapted for each protocol. The image processing unit only needs to output brightness data through its own peripheral interface, and the signal bridge circuit can be responsible for forwarding this data and communicating with other LED driving ports, thereby greatly simplifying the complexity of the system and improving compatibility issues.

[0046] The advantage of the LED backlight drive signal bridge circuit is that its streamlined design simplifies the processing logic. It does not have the redundant resources in the traditional drive control unit, and only retains the necessary functions to meet the needs of the backlight system, such as the IIC interface. Remove unnecessary IO ports and other redundant functions, such as the arm core, CPU core, FPGA core, etc. of the drive control unit in the existing solution. Removing these redundant parts greatly reduces the chip area, thereby effectively reducing costs and improving system efficiency. This optimization not only simplifies the signal processing process, reduces unnecessary calculations and resource consumption, but also enables the overall system to achieve a better balance between performance and cost.

[0047] In the embodiment of the present invention, Figure 2 The signal pins of the LED backlight drive signal bridge circuit are defined as follows: 1. System LD data, i.e. the brightness data emitted by the system, including: (1) System LD data SCK, SPI clock signal; (2) System LD data MOSI, SPI brightness data output signal; (3) System LD data MISO, SPI data readback signal; (4) System LD data CS, SPI brightness data chip select signal; 2. Debug, signal bridge circuit Debug pin (1) CLK_Debug, SPI Debug clock signal; (2) SDI_debug, SPI Debug data signal; (3) SDO Debug, SPI Debug read back data signal; (4) CS Debug, SPI Debug chip select signal; 3. Mapping, signal bridge circuit storage communication pin (1) CLK Flash / E, Flash / EEPROM Mapping read and write clock signal; (2) SDI Flash / E, Flash / EEPROM Mapping write signal; (3) SDO Flash / E, Flash / EEPROM Mapping read signal; (4) CS Flash / E, Flash / EEPROM Mapping chip select signal; 4. V / Hsync, system synchronization signal; 5. BL_EN system enable signal; 5. Reset, reset pin, can be connected to the system, or pulled out separately to reset the device; 6. Fault, error reporting pin, used to read device abnormal information. It can be connected to the system or pulled out for operation separately. 7. FB_ADJ, VLED dynamic adjustment feedback pin, real-time adjustment of VLED voltage; 8. CDBP#N (Clocked Data Bidirectional Protocol), clock data bidirectional protocol signal, the number can be 1 or N in this device, this signal is used to control the LED drive to achieve the corresponding backlight screen. A group of CDBP signals has two interfaces, one is SCK and the other is DATA, where CDBP#N refers to the Nth group of CDBP signals, specifically: (1) CDBP_SCK, clock signal of clock data bidirectional protocol; (2) CDBP_DATA, data signal of clock data bidirectional protocol; It should be noted that the actual pins of the LED backlight drive signal bridge circuit can be flexibly defined, such as Figure 3 As shown, the system LD data signal received from the image processing unit may be an SPI signal, such as Figure 3 As shown in (b) in the figure; it may also be a QSPI signal, such as Figure 3 As shown in (d) in the figure; it may also be an IIC signal, such as Figure 3 As shown in (a) in the figure; it may also be a UART signal, such as Figure 3 As shown in (c) in the figure. The backlight protocol signal sent may be a CDBP signal, or may be other communication protocols such as two-line duplex / half-duplex, single-line duplex / half-duplex, single-line serial, serial-parallel combination, etc. Figure 4 As shown, Figure 4 (a) shows the communication between the signal bridge circuit and the LED driver unit when the backlight protocol signal is a single-line duplex / half-duplex protocol. Figure 4 (b) shows the communication between the signal bridge circuit and the LED driver unit when the backlight protocol signal is a single-line communication protocol. Figure 4 (c) shows the communication between the signal bridge circuit and the LED driver unit when the backlight protocol signal is a two-wire duplex / half-duplex protocol. Figure 4 (d) in the figure shows the communication between the signal bridge circuit and the LED driving unit when the backlight protocol signal is a single-wire\two-wire combination protocol.

[0048] In the embodiment of the present invention, the working process of the above-mentioned MINILED backlight system is as follows: 1. After power-on, the signal bridge circuit reads the mapping information and assigns the system address; 2. The image processing unit gives BL_EN enable, and the LED backlight drive signal bridge circuit is ready to receive system-side brightness data; 3. The front-end image processing unit sends a synchronization signal and sends the brightness information to the LED backlight drive signal bridge circuit; 4. The LED backlight drive signal bridge circuit converts the data signal into the CDBP protocol format and forwards it to each group of LED drive units through the CDBP pin interface; 5. The LED driver unit receives and analyzes the brightness data and outputs the corresponding current; 6. The LED backlight drive signal bridge circuit reads back the voltage of CH- and determines whether the VLED voltage needs to be adjusted (the judgment is performed once every frame or several frames); 7. The LED backlight drive signal bridge circuit controls the corresponding VLED voltage through the FB_ADJ pin (adjustment is performed once every frame or several frames); 8. The LED backlight drive signal bridge circuit reads back abnormal information. If there is an abnormal LED drive readback information, the abnormal information will be reported to the image processing unit for the next step (the abnormal information is read back once for each frame or several frames); 9. Triggering the RESET signal at any time will initialize the LED backlight drive signal bridge circuit.

[0049] In another optional embodiment of the present invention, a specific LED backlight driving signal bridge circuit is disclosed, such as Figure 5 As shown, the modules in the solid-line frame are core modules, and the modules in the dotted-line frame are simplified modules. The functions of each functional module are as follows: 1. Debug controller: used to receive or send debug data information, and control and monitor other modules inside the chip based on this data, such as setting register values, reading chip internal status information, etc. It mainly helps developers quickly locate and solve problems in applications and tests; 2. Mapping register or random access memory: used to store data. Mapping register can map the address of data to facilitate fast access and processing of data.

[0050] 3. Storage controller: responsible for managing the internal or external storage devices of the chip, such as Flash, EEPROM, etc., controlling the read and write operations, address allocation, data verification, etc. of the data in the storage device. Ensure the normal operation of the storage device, ensure that the chip can reliably store and read important content such as firmware, configuration information, user data, etc., and maintain data integrity even in the event of a power outage.

[0051] 4. Fault input / output: Receive fault signals from external input, or output the fault status information inside the chip to the outside. Realize fault interaction between the chip and the external system. When the chip fails, it can promptly notify the external system so that appropriate measures can be taken, such as fault diagnosis, repair, or switching to the backup system. At the same time, it can also receive external fault indications and make corresponding adjustments to the working status of the chip. For example, receive abnormal information of the LED driver unit, FB information, etc.

[0052] 5. Backlight enable input / output: controls the interaction between the chip and the backlight system, receives external backlight enable signals, or outputs the chip's control signals for the backlight system to the outside.

[0053] 6. Slave controller 101: In the chip control system, as a slave part, it receives instructions from the main controller or other modules and performs corresponding operations, such as data transmission and processing.

[0054] 7. Synchronous signal input / output: used to process and send image refresh and synchronization of the control display system to ensure that the image will not be torn or flickered during the display process.

[0055] 8. Reset input / output: Receive external reset signals, reset the chip, and restore the chip to its initial state; or output the chip reset status information to the outside so that the external system can understand the reset status of the chip.

[0056] 9.32 MHz oscillator: Generates a stable 32 MHz clock signal, providing a unified clock reference for each module of the chip.

[0057] 10. Bandgap reference module: provides a stable reference voltage. It also provides a stable reference voltage for the analog circuits inside the chip, such as digital-to-analog converters, to ensure the performance and accuracy of the analog circuits, and to ensure that the chip can operate stably under different working conditions and output accurate analog signals.

[0058] 11. Digital to Analog Converter: This module is responsible for converting digital signals into analog signals.

[0059] 12. Feedback adjustment input / output: Receive external feedback signals, or output the internal feedback adjustment signals of the chip to the outside, which is used to detect and adjust the VLED voltage or other chip working conditions.

[0060] 13. Data remapping: Remap and process the input data according to the mapping of the actual project, including data format conversion, address reallocation, data screening and combination, etc.

[0061] 14. Port selection module 104: according to preset conditions or control signals, selects one or more paths of input data for output, and distributes the data to different output ports (CDBP#1, CDBP#2, CDBP#3, CDBP#4).

[0062] The specific implementation of the LED backlight drive signal bridge circuit is as follows: When the front-end SOC sends a signal, the oscillator generates a stable clock signal, providing a unified clock reference for the signal bridge circuit, and the slave controller 101 immediately receives the brightness data. Subsequently, under the precise synchronization of the synchronization signal, these data are transmitted to the data remapping module. This module redistributes and converts the data to make it more suitable for subsequent processes. Next, the processed data is sent to the port selection module 104, where a series of operations such as reorganization and packaging are performed, and finally it is sent to the port of each output signal group.

[0063] Embodiment 3 Embodiment 3 of the present invention discloses a bridge-connected LED driving unit. Specifically, the bridge-connected LED driving unit may include a slave controller 101, a synchronization signal input and output terminal 102, a data remapper 103, a port selection module 104, a first port 106, and a driving control module 107. Figure 6 As shown, where: A first terminal of the slave controller 101 is used to receive the first LED control data, a second terminal of the slave controller 101 is electrically connected to a first terminal of the data remapper 103, and a third terminal of the slave controller 101 is electrically connected to a first terminal of the synchronization signal input and output terminal 102; The second end of the synchronization signal input and output end 102 is used to receive the synchronization signal, and the slave controller 101 transmits the first LED data to the data remapper 103 in synchronization with the synchronization signal; The data remapper 103 is used to convert the first LED control data into the second LED control data, wherein the second LED control data is of a different type from the first LED control data, and the second end of the data remapper 103 is electrically connected to the port selection module 104; The port selection module 104 is electrically connected to the plurality of common LED driving units in a serial or parallel manner, and is used to divide the second LED control data into different sub-signals according to a preset data distribution mode, and distribute the different sub-signals to the corresponding common LED driving units; The port selection module 104 is also electrically connected to the first port 106 , and the port selection module 104 is used to distribute the first sub-signal in the second LED control data that matches the first port 106 to the first port 106 ; The driving control module 107 is electrically connected to the first port 106 , and is used to control the operation of the corresponding LED light-emitting unit according to the first sub-signal.

[0064] In the third embodiment of the present invention, the system integration is further improved by integrating the signal bridge circuit with the LED driving unit. This design not only simplifies the system structure and reduces the number of components, but also significantly reduces the packaging cost and the complexity of later development and debugging. Among them, by integrating the signal bridge circuit with the LED driving unit, the overall architecture of the system is optimized, avoiding the redundant links of signal transmission and processing in the traditional solution, and further improving the efficiency and stability of signal processing. While achieving efficient signal transmission and processing, the integrated system also reduces the need for additional connections and interfaces, and reduces the physical space occupied by the system. In addition, the integrated solution greatly reduces the mutual coordination and communication links between multiple components in the traditional design, thereby simplifying the production and assembly process and reducing manufacturing costs. During the packaging and later development process, the overall development cycle is also shortened due to the reduction of coordination and debugging work of multiple components, which greatly improves production efficiency.

[0065] In an optional embodiment, the bridge-connected LED driving unit may further include a mapping register and a storage controller, wherein: A first terminal of the mapping register is electrically connected to a third terminal of the data remapper 103, and the mapping register is used to cache specific data in the data remapper 103; The storage controller is electrically connected to the second end of the mapping register, and the storage controller is used to control the mapping register to perform a cache operation of specific data.

[0066] In another optional embodiment, the specific operation of the data remapper 103 converting the first LED control data into the second LED control data may include: Parsing the first LED control data into a data frame according to a communication protocol of the first LED control data; Reorganize the structure of the data frame into a structure corresponding to the second LED control data; Translate the content of the data frame into a format corresponding to the second LED control data; The communication protocol corresponding to the second LED control data adds a frame header, a frame footer and check information to the data frame, and then generates the second LED control data according to the timing and level of the communication protocol corresponding to the second LED control data.

[0067] Embodiment 4 Embodiment 4 of the present invention discloses an LED backlight system with a built-in signal bridging function, which may include an image processing unit, the bridge-containing LED driving unit in the above embodiment 3, and a plurality of ordinary LED driving units, wherein: The image processing unit is electrically connected to the bridge LED driving unit, and the image processing unit is used to generate first LED control data and send the first LED control data to the bridge LED driving unit; The bridge LED driving unit is electrically connected to multiple ordinary LED driving units in a serial or parallel manner. The bridge LED driving unit is used to convert the first LED control data into the second LED control data, divide the second LED control data into different sub-signals according to a preset data distribution mode, distribute the different sub-signals to the corresponding ordinary LED driving units, and control the operation of the corresponding LED light-emitting unit according to the first sub-signal.

[0068] In an optional embodiment, the LED backlight system with built-in signal bridging function, such as Figure 7 As shown, different from the second embodiment of the present invention, in this optional embodiment, the signal bridge circuit in the LED backlight system with a built-in signal bridge function can not only receive and process the front-end signal, but also assume the function of the first group of driving units in each group of LED driving units, that is, the bridged LED driving unit. The bridged LED driving unit can control the basic functions of the LED partitions such as brightness and darkness, on and off, just like the traditional LED driving unit.

[0069] This design brings multiple advantages: First, after receiving and processing the signal, the signal bridge circuit can directly pass the control signal to the LED driver unit, greatly reducing the human resource consumption of the image processing unit manufacturer in the signal analysis and debugging process. In traditional solutions, the image processing unit often requires a dedicated team to configure and adjust parameters, but in this optional embodiment, due to the close integration of the signal bridge circuit and the LED driver unit, the workload of the image processing unit manufacturer is reduced.

[0070] Secondly, this design reduces the complexity and cost of the drive control unit by integrating and simplifying the system. Traditional drive control units usually need to process a large number of complex signals and perform internal distribution and packaging work, while the signal bridge circuit directly transmits signals and controls the functions of LED partitions, reducing additional hardware and computing requirements, thereby greatly reducing system costs.

[0071] It should be noted that Figure 7 For the description of the actual pins of the backlight system, please refer to the second embodiment of the present invention, wherein the system LD data signal received from the image processing unit may be an SPI signal, or may be a QSPI, IIC, UART or other signal. The backlight protocol signal sent may be a CDBP signal, or may be one of other communication protocols such as two-wire duplex, single-wire duplex, single-wire serial, serial-parallel combination, etc.

[0072] In this optional embodiment, specifically, the internal architecture of the bridge LED driving unit is as follows: Figure 8 As shown, the dotted-line frame module is a module that can be simplified, and the solid-line frame module is a core module.

[0073] The functions and effects of each module are as follows: 1. Debug controller: used to receive or send debug data information, and control and monitor other modules inside the chip based on this data, such as setting register values, reading chip internal status information, etc. It mainly helps developers quickly locate and solve problems in applications and tests; 2. Map register or random access memory: used to store data. Map register can map the address of data to facilitate fast access and processing of data.

[0074] 3. Storage controller: responsible for managing the internal or external storage devices of the chip, such as Flash, EEPROM, etc., controlling the read and write operations, address allocation, data verification, etc. of the data in the storage device. Ensure the normal operation of the storage device, ensure that the chip can reliably store and read important content such as firmware, configuration information, user data, etc., and maintain data integrity even in the event of a power outage.

[0075] 4. Fault input / output: Receive fault signals from external input, or output the fault status information inside the chip to the outside. Realize fault interaction between the chip and the external system. When the chip fails, it can promptly notify the external system so that appropriate measures can be taken, such as fault diagnosis, repair, or switching to the backup system. At the same time, it can also receive external fault indications and make corresponding adjustments to the working status of the chip. For example, receive abnormal information of the LED driver unit, FB information, etc.

[0076] 5. Backlight enable input / output: controls the interaction between the chip and the backlight system, receives external backlight enable signals, or outputs the chip's control signals for the backlight system to the outside.

[0077] 6. Slave controller 101: In the chip control system, as a slave part, it receives instructions from the main controller or other modules and performs corresponding operations, such as data transmission and processing.

[0078] 7. Synchronous signal input / output: used to process and send image refresh and synchronization to control the display system to ensure that the image will not be torn or flickered during display.

[0079] 8. Reset input / output: Receive external reset signals, reset the chip, and restore the chip to its initial state; or output the chip reset status information to the outside so that the external system can understand the reset status of the chip.

[0080] 9. 32 MHz oscillator: generates a stable 32 MHz clock signal, providing a unified clock reference for each module of the chip.

[0081] 10. Bandgap reference module: provides a stable reference voltage. It also provides a stable reference voltage for the analog circuits inside the chip, such as digital-to-analog converters, to ensure the performance and accuracy of the analog circuits, and to ensure that the chip can operate stably under different working conditions and output accurate analog signals.

[0082] 11. Digital to Analog Converter: This module is responsible for converting digital signals into analog signals.

[0083] 12. Feedback adjustment input / output: Receive external feedback signals, or output the internal feedback adjustment signals of the chip to the outside, which is used to detect and adjust the VLED voltage or other chip working conditions.

[0084] 13. Data remapping: Remap and process the input data according to the mapping of the actual project, including data format conversion, address reallocation, data screening and combination, etc.

[0085] 14. Port selection module 104: selects one or more of the input data for output according to preset conditions or control signals, and distributes the data to different output ports (CDBP#1, CDBP#2, CDBP#3, CDBP#4); 15. Open-short circuit module: used to detect the open-short circuit status of the LED drive pin; 16. Over-temperature protection and temperature monitoring: used to monitor the internal temperature of the IC and turn on temperature protection when the temperature exceeds the limit; 17. Drive control module 107: used to control the internal logic processing and data processing of the drive IC; 18.LED drive interface: used to connect the negative pole of LED to realize the on and off and brightness control of LED.

[0086] The LED backlight system with a signal bridging function in the embodiment of the present invention has the following beneficial effects: 1. Efficient signal processing: The signal bridge circuit directly analyzes the Local Dimming (LD) signal through hardware and forwards it to each CDBP signal group, avoiding the tedious steps of complex signal analysis, internal algorithm processing and packaging of traditional drive control units, thereby improving signal processing efficiency.

[0087] 2. Resource optimization and cost reduction: The signal bridge circuit simplifies the redundant resources in the traditional drive control unit, retaining only the necessary functions (such as IIC interface) to meet the needs of the backlight system, and removing unnecessary IO ports and other redundant functional modules. This design effectively reduces the waste of hardware resources, thereby reducing the overall system cost.

[0088] 2. Solve the problem of insufficient resources: By simplifying the signal processing process and streamlining the hardware configuration, the signal bridge circuit effectively solves the problem of insufficient interface resources and internal resources when the image processing unit is directly driven, ensuring that the system can run efficiently.

[0089] 2. Simplify system architecture: Compared with traditional solutions, the design of the signal bridge circuit is more direct and concise, which not only reduces the complicated operation steps, but also makes the system architecture clearer, and improves the overall work efficiency and stability of the system.

[0090] 3. Improve system response speed: Since the intermediate steps of signal processing are reduced, the signal bridging circuit can complete signal forwarding and processing in a shorter time, thereby improving the system's response speed and dynamic performance.

[0091] Through the specific description of the above embodiments, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on such an understanding, the above technical solution can be essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, and the storage medium includes a read-only memory (ROM), a random access memory (RAM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a one-time programmable read-only memory (OTPROM), an electronically erasable programmable read-only memory (EEPROM), a compact disc (CD-ROM) or other optical disc storage, magnetic disk storage, magnetic tape storage, or any other computer-readable medium that can be used to carry or store data.

[0092] Finally, it should be noted that the LED backlight drive signal bridge circuit, LED drive unit and LED backlight system disclosed in the embodiments of the present invention are only preferred embodiments of the present invention, which are only used to illustrate the technical solution of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An LED backlight drive signal bridge circuit, characterized in that: The circuit comprises a slave controller, a synchronization signal input and output terminal, a data remapper, a port selection module and a plurality of output signal ports, wherein: The first end of the slave controller is used to receive the first LED control data, the second end of the slave controller is electrically connected to the first end of the data remapper, and the third end of the slave controller is electrically connected to the first end of the synchronization signal input and output end; The second end of the synchronization signal input and output end is used to receive a synchronization signal, and the slave controller transmits the first LED data to the data remapper in synchronization with the synchronization signal; The data remapper is used to convert the first LED control data into second LED control data, wherein the second LED control data is of a different type from the first LED control data, and the second end of the data remapper is electrically connected to the port selection module; The port selection module is electrically connected to the plurality of output signal ports, and is used for dividing the second LED control data into different sub-signals according to a preset data allocation mode, and then allocating the different sub-signals to corresponding output signal ports; The output signal port is used to send the corresponding sub-signal to the corresponding LED driving unit, and the sub-signal is used to control the corresponding LED driving unit, thereby realizing the corresponding backlight picture.

2. The LED backlight driving signal bridge circuit according to claim 1, characterized in that: The type of the first LED control data is one of an SPI signal, a QSPI signal, an IIC signal and a UART signal; the type of the second LED control data is one of a CDBP signal, a two-line duplex / half-duplex signal, a single-line duplex / half-duplex signal, a single-line serial signal, and a series-parallel combination signal.

3. The LED backlight driving signal bridge circuit according to claim 2, characterized in that: The circuit also includes a mapping register and a storage controller, wherein: A first end of the mapping register is electrically connected to a third end of the data remapper, and the mapping register is used to cache specific data in the data remapper; The storage controller is electrically connected to the second end of the mapping register, and the storage controller is used to control the mapping register to perform a cache operation on the specific data.

4. The LED backlight driving signal bridge circuit according to claim 1, characterized in that: The specific operation method of the data remapper converting the first LED control data into the second LED control data includes: parsing the first LED control data into a data frame according to a communication protocol of the first LED control data; Reorganizing the structure of the data frame into a structure corresponding to the second LED control data; Translating the content of the data frame into a format corresponding to the second LED control data; According to the communication protocol corresponding to the second LED control data, a frame header, a frame footer and check information are added to the data frame, and then the second LED control data is generated according to the timing and level of the communication protocol corresponding to the second LED control data.

5. The LED backlight driving signal bridge circuit according to claim 1, characterized in that: The circuit further comprises a digital-to-analog converter, a bandgap reference module and a feedback adjustment module, wherein: The bandgap reference module is electrically connected to the first end of the digital-to-analog converter, and the bandgap reference module is used to provide a reference voltage for the digital-to-analog converter; The second end of the digital-to-analog converter is electrically connected to the feedback regulation module, and the digital-to-analog converter is used to convert the digital signal into an analog signal and send it to the feedback regulation module; The feedback regulation module is used to receive the driving voltage feedback information of the LED light-emitting unit corresponding to each of the LED driving units, and dynamically generate an adjustment signal according to the analog signal and the feedback information, and the adjustment signal is used to adjust the driving voltage corresponding to each of the LED light-emitting units.

6. An LED backlight system, characterized in that: The LED backlight system comprises an image processing unit, an LED backlight driving signal bridge circuit as claimed in any one of claims 1 to 5, and a plurality of LED driving units, wherein: The image processing unit is used to generate first LED control data, and send the first LED control data to the LED backlight drive signal bridge circuit; Each of the output signal ports of the LED backlight driving signal bridge circuit is electrically connected to a corresponding LED driving unit, so that the output signal port sends a corresponding sub-signal to the corresponding LED driving unit; The LED driving unit is used to realize a corresponding backlight picture according to the sub-signal.

7. A bridge-connected LED driving unit, characterized in that: The bridge-connected LED driving unit comprises a slave controller, a synchronization signal input and output terminal, a data remapper, a port selection module, a first port and a driving control module, wherein: The first end of the slave controller is used to receive the first LED control data, the second end of the slave controller is electrically connected to the first end of the data remapper, and the third end of the slave controller is electrically connected to the first end of the synchronization signal input and output end; The second end of the synchronization signal input and output end is used to receive a synchronization signal, and the slave controller transmits the first LED data to the data remapper in synchronization with the synchronization signal; The data remapper is used to convert the first LED control data into second LED control data, wherein the second LED control data is of a different type from the first LED control data, and the second end of the data remapper is electrically connected to the port selection module; The port selection module is electrically connected to a plurality of common LED driving units in a serial or parallel manner, and the port selection module is used to divide the second LED control data into different sub-signals according to a preset data allocation mode, and allocate the different sub-signals to the corresponding common LED driving units; The port selection module is also electrically connected to the first port, and the port selection module is used to distribute the first sub-signal in the second LED control data that matches the first port to the first port; The driving control module is electrically connected to the first port, and is used to control the operation of the corresponding LED light-emitting unit according to the first sub-signal.

8. The bridge-connected LED driving unit according to claim 7, characterized in that: The bridge-connected LED driving unit further includes a mapping register and a storage controller, wherein: A first end of the mapping register is electrically connected to a third end of the data remapper, and the mapping register is used to cache specific data in the data remapper; The storage controller is electrically connected to the second end of the mapping register, and the storage controller is used to control the mapping register to perform a cache operation on the specific data.

9. The bridge-connected LED driving unit according to claim 7, characterized in that: The specific operation of the data remapper converting the first LED control data into the second LED control data includes: parsing the first LED control data into a data frame according to a communication protocol of the first LED control data; Reorganizing the structure of the data frame into a structure corresponding to the second LED control data; Translating the content of the data frame into a format corresponding to the second LED control data; The communication protocol corresponding to the second LED control data adds a frame header, a frame footer and check information to the data frame, and then generates the second LED control data according to the timing and level of the communication protocol corresponding to the second LED control data.

10. An LED backlight system with a built-in signal bridging function, characterized in that: The system comprises an image processing unit, a bridged LED driving unit as claimed in any one of claims 7 to 9, and a plurality of common LED driving units, wherein: The image processing unit is electrically connected to the bridge-containing LED driving unit, and the image processing unit is used to generate first LED control data and send the first LED control data to the bridge-containing LED driving unit; The bridge-connected LED driving unit is electrically connected to a plurality of common LED driving units in a serial or parallel manner, and is used to convert the first LED control data into second LED control data, divide the second LED control data into different sub-signals according to a preset data allocation mode, allocate the different sub-signals to the corresponding common LED driving units, and control the operation of the corresponding LED light-emitting unit according to the first sub-signal.

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