LED chip driving method, device, display system and display unit

Abstract

The present application relates to an LED chip driving method, device, display system and display unit, wherein the LED chip driving method includes: determining a first transmission link, wherein the first transmission link includes a main input and output interface of a plurality of row driving modules; detecting the interface status in the first transmission link, and if the main input and output interface fails, replacing the corresponding main input and output interface with a backup input and output interface, and determining a second transmission link; and driving the LED chip to display through the second transmission link. Through the present application, the problem of low reliability of the LED chip driving process is solved, and the technical effect of improving the reliability of LED chip driving is achieved.

Description

Technical Field

[0001] The present application relates to the field of small-pitch LED display driving, and in particular to an LED chip driving method, device, display system and display unit. Background Art

[0002] The existing small-pitch LED display module is mainly composed of LED lamp beads, row driver MOS, and column driver IC. It adopts dynamic scanning to realize the lighting and driving display of each row of LED lamp beads. Among them, the same column of LED lamp beads scanned in N rows share the driving channel of the same LED column driver chip, and the row driver MOS is used to realize the dynamic scanning and driving lighting of LED lamp beads in different rows in time-sharing mode.

[0003] For this dynamic scanning driving mode, each LED driver module will drive a group of LED lights, and at the same time, it needs to transmit the display data to the next-level LED driver module to ensure that the LED is lit. However, in actual application, if the LED driver module fails or the data interface fails, it will cause the display recognition of the entire LED display module, and the reliability of the LED chip driver is low.

[0004] With respect to the technical problem of low reliability of LED chip driving in related technologies, no effective solution has been proposed yet. Summary of the invention

[0005] In this embodiment, a LED chip driving method, device, display system and display unit are provided to solve the problem of low reliability of LED chip driving in the related art.

[0006] In a first aspect, a method for driving an LED chip is provided in this embodiment. The method for driving an LED chip includes:

[0007] Determining a first transmission link, wherein the first transmission link includes a main input and output interface of a plurality of row driver modules;

[0008] Detecting the interface status in the first transmission link, if the main input / output interface fails, replacing the corresponding main input / output interface with a backup input / output interface to determine a second transmission link;

[0009] The LED chip is driven to display via the second transmission link.

[0010] In one embodiment, determining the first transmission link includes: obtaining an initialization signal; determining a cascade turning point according to the initialization signal, and determining a connection relationship between the main input and output interfaces of adjacent row driving modules according to the cascade turning point to obtain the first transmission link.

[0011] In one embodiment, the detecting the interface status in the first transmission link also includes: transmitting the initialization signal through the first transmission link to assign chip coordinates to the LED chip; acquiring a display signal, the display signal including image information to be displayed in a target area and corresponding LED chip coordinate information; transmitting the display signal through the first transmission link to drive the LED chip for display, the chip coordinates of the LED chip corresponding to the LED chip coordinate information of the display signal.

[0012] In one embodiment, driving the LED chip for display through the second transmission link includes: obtaining an initialization signal; transmitting the initialization signal through the second transmission link to assign chip coordinates to the LED chip; obtaining a display signal, wherein the display signal includes image information to be displayed in a target area and corresponding LED chip coordinate information; transmitting the display signal through the second transmission link to drive the LED chip for display.

[0013] In one embodiment, the initialization signal is transmitted through the second transmission link, and after the chip coordinates are assigned to the LED chip, the method includes: obtaining a main display signal and a backup display signal, wherein the main display signal and the backup display signal contain the same information; transmitting the main display signal to the backup input channel of the first LED chip in the first row driving module; transmitting the backup display signal to the main input channel of the first LED chip and the backup input channel of the second LED chip in the first row driving module.

[0014] In one embodiment, the step of transmitting the backup display signal to the main input channel of the first LED chip and the backup input channel of the second LED chip in the row driving module includes: sending the backup display signal to the main input channel of the first LED chip of the second row driving module through the main output interface of the first row driving module; sending the backup display signal to the backup input channel of the second LED chip of the second row driving module through the backup output interface of the first row driving module.

[0015] In a second aspect, an LED chip driving device is provided in this embodiment, and the device includes:

[0016] An acquisition module, configured to determine a first transmission link, wherein the first transmission link includes main input and output interfaces of a plurality of row driving modules;

[0017] a detection module, configured to detect the interface status in the first transmission link, and if the primary input / output interface fails, replace the corresponding primary input / output interface with a backup input / output interface to determine a second transmission link;

[0018] A processing module is used to drive the LED chip to display through the second transmission link.

[0019] In the third aspect, an LED display system is provided in this embodiment, wherein the LED display system includes a main control module and an LED display module, wherein the main control module is connected to the LED display module, wherein the LED display module includes an LED chip and a row driving module, wherein the row driving module is used to receive and transmit display signals and drive the LED chip for display, and the main control module is used to implement the LED chip driving method described in the first aspect above.

[0020] In the fourth aspect, an LED display unit is provided in this embodiment, which includes: a data main input channel, a data backup input channel, a red LED chip main power supply channel, a blue-green LED chip main power supply channel, a red LED chip backup power supply channel, a blue-green LED chip backup power supply channel, a data cascade output channel and a ground channel.

[0021] In one embodiment, the LED display unit further includes a driving chip and a plurality of RGB pixel points, wherein the RGB pixel points are arranged around the periphery of the driving chip.

[0022] Compared with the related art, the LED chip driving method provided in this embodiment is applied to an LED display module, wherein the LED display module includes an LED chip and a row driving module, wherein the row driving module is used to receive and transmit display signals and drive the LED chip to display by determining a first transmission link, wherein the first transmission link includes a plurality of main input and output interfaces of the row driving modules; detecting the interface status in the first transmission link, and if the main input and output interface fails, replacing the corresponding main input and output interface with a backup input and output interface, and determining a second transmission link; driving the LED chip to display through the second transmission link solves the problem of low reliability of the LED chip driving process and achieves the technical effect of improving the reliability of LED chip driving.

[0023] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1is a hardware structure block diagram of a terminal of the LED chip driving method of this embodiment;

[0026] Figure 2 It is a schematic diagram of LED driving display according to the prior art;

[0027] Figure 3 is a schematic diagram of the back side of an LED display unit according to an embodiment of the present application;

[0028] Figure 4 is a front schematic diagram of an LED display unit according to an embodiment of the present application;

[0029] Figure 5 is a schematic diagram of a region display of a LED chip driving method according to an embodiment of the present application;

[0030] Figure 6 is a flow chart of the LED chip driving method of this embodiment;

[0031] Figure 7 is a schematic diagram of the row driving module cascade connection of the LED chip driving method according to an embodiment of the present application;

[0032] Figure 8 Schematic diagram of the internal chip interconnection of the row driving module of the LED chip driving method according to the embodiment of the present application;

[0033] Fig. 9 is a schematic diagram of an LED chip driving method according to a specific embodiment of the present application;

[0034] Fig.10 is a schematic diagram of the row driving module cascade of the LED chip driving method according to a specific embodiment of the present application;

[0035] Fig.11 4 is a structural block diagram of the LED chip driving device of this embodiment. DETAILED DESCRIPTION

[0036] In order to more clearly understand the purpose, technical solutions and advantages of the present application, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0037] Unless otherwise defined, the technical terms or scientific terms involved in this application shall have the general meaning understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the", "these" and the like in this application do not represent quantitative restrictions, and they can be singular or plural. The terms "include", "comprise", "have" and any variants thereof involved in this application are intended to cover non-exclusive inclusions; for example, a process, method and system, product or device comprising a series of steps or modules (units) is not limited to the listed steps or modules (units), but may include unlisted steps or modules (units), or may include other steps or modules (units) inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether directly or indirectly. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. Usually, the character " / " indicates that the objects associated with each other are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0038] The method embodiment provided in this embodiment can be executed in a terminal, a computer or a similar computing device. For example, running on a terminal, Figure 1 FIG. 1 is a hardware structure diagram of a terminal of the LED chip driving method of this embodiment. Figure 1 As shown, the terminal may include one or more ( Figure 1 Only one is shown in the figure) processor 102 and memory 104 for storing data, wherein processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA. The above terminal may also include a transmission device 106 and an input and output device 108 for communication functions. It can be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the above terminal. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations shown.

[0039] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the LED chip driving method in this embodiment. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, to implement the above method. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories may be connected to the terminal via a network. Examples of the above network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0040] The transmission device 106 is used to receive or send data via a network. The above network includes a wireless network provided by the communication provider of the terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 can be a radio frequency (Radio Frequency, referred to as RF) module, which is used to communicate with the Internet wirelessly.

[0041] The existing small-pitch LED display module is mainly composed of LED lamp beads, row driver MOS, and column driver IC, and uses dynamic scanning to realize the lighting drive display of each row of LED lamp beads. Figure 2 It is a schematic diagram of LED driving display according to the prior art, such as Figure 2 As shown in the figure, the LED lamp beads in the same column of N-row scanning share the driving channel of the same LED column driver chip, and the row driver MOS is used to realize the dynamic scanning and driving of the LED lamp beads in different rows in time-sharing mode. This dynamic scanning LED driving method is to drive and light up by reusing the column driver chip and time-sharing the row driver chip. Since the lamp beads, row driver MOS, column driver IC, and PCB wiring all have parasitic capacitance, when many LED lamp beads reuse the same channel, the parasitic capacitance will increase exponentially, and the LED lamp beads in the same column and the LED lamp beads driven by MOS in different rows will affect each other, resulting in common problems such as caterpillars, high-low contrast coupling, and text ghosting in the LED industry.

[0042] In this embodiment, an LED display unit is provided, which includes: a data main input channel, a data backup input channel, a red LED chip main power supply channel, a blue-green LED chip main power supply channel, a red LED chip backup power supply channel, a blue-green LED chip backup power supply channel, a data cascade output channel and a ground channel.

[0043] Specifically, Figure 3 is a schematic diagram of the back side of an LED display unit according to an embodiment of the present application, such as Figure 3 As shown in the figure, there are 8 pads on the back of the LED light-emitting device, among which the data and power inputs have a backup channel. When the data or power is abnormal, the backup channel can be enabled to improve the reliability of the device. Among them, DATA IN1 is the main data input channel, DATAIN2 is the data backup input channel, VDDR1 and VDDGB1 are the main power supply channel of the red LED chip and the main power supply channel of the blue-green LED chip, respectively, VDDR2 and VDDGB2 are the backup power supply channel of the red LED chip and the backup power supply channel of the blue-green LED chip, respectively, and DATAOUT is the data cascade output channel, which is responsible for the cascade output of data.

[0044] The LED display unit of this embodiment has a primary and backup data channel and a power transmission channel. When an abnormality occurs in the link, the LED display unit can switch to the backup link to continue receiving and transmitting data, thereby ensuring data security and reliability.

[0045] In one embodiment, the LED display unit further includes a driving chip and a plurality of RGB pixel points, wherein the RGB pixel points are arranged around the periphery of the driving chip.

[0046] Specifically, Figure 4 is a front view of an LED display unit according to an embodiment of the present application, such as Figure 4 As shown, on the front of the LED light-emitting device, four RGB pixels are evenly and equidistantly distributed. The driver IC, i.e., the LED driver chip, is located in the center of the light-emitting device. The driver IC and the four groups of RGB light-emitting chips are interconnected through a BT board or a FR4 material PCB substrate. Preferably, in order to achieve better contrast, black ink or a black film can be sprayed on the entire substrate surface to cover the driver IC after the driver IC is solidified.

[0047] Compared with the dynamic row scanning method adopted in the prior art, the LED display unit of this embodiment integrates the LED driver chip inside the LED lamp bead. Each lamp bead has an independent driving circuit, which can avoid mutual influence between multiple LED lamp beads and will not cause display problems such as coupling and ghosting caused by parasitic capacitance, thereby improving the display effect of the LED display unit.

[0048] In this embodiment, a LED display system is provided, which includes a main control module and an LED display module, wherein the main control module is connected to the LED display module, wherein the LED display module includes an LED chip and a row driving module, wherein the row driving module is used to receive and transmit display signals and drive the LED chip for display, and the main control module is used to implement the LED chip driving method described in the first aspect above.

[0049] Specifically, Figure 5 is a schematic diagram showing a region of an LED chip driving method according to an embodiment of the present application. Figure 5 As shown, the main control module is a control chip with high integration, also known as a control card. An LED display module is designed to consist of multiple data display blocks. Due to the signal rate limit of a single signal transmission, a single data display block can drive a limited number of pixels. When the data load limit is exceeded, more data display blocks are divided. Each data display block is connected through a data DataN_In1 signal transmission line, and receives the data signal sent by the control card to drive the light display. Preferably, in order to improve the reliability of data transmission, two data signal lines can be used to connect to the control card, where DataN_In1 and DataN_IN2 are the same signal, and the chip in the data block performs adaptive switching according to whether the signal is abnormal. Taking a 160*180 pixel display module as an example, it is divided into 6 display blocks in total, each display block covers 160*30 pixels, and each display block transmits signals through two sets of main and standby signal lines.

[0050] In this embodiment, a LED chip driving method is provided, which is applied to an LED display module. The LED display module includes an LED chip and a row driving module. The row driving module is used to receive and transmit display signals and drive the LED chip to display. Figure 6 is a flow chart of the LED chip driving method of this embodiment. Figure 6 As shown, the process includes the following steps:

[0051] Step S601: determining a first transmission link, wherein the first transmission link includes main input and output interfaces of a plurality of row driver modules.

[0052] Specifically, each LED display module is composed of multiple row drive modules, each row drive module corresponds to multiple LED chips to drive the LED chips for display. The first transmission link includes the main input and output interfaces of the multiple row drive modules and the cascade relationship between the input and output interfaces.

[0053] Step S602: Detect the interface status in the first transmission link. If the main input / output interface fails, replace the corresponding main input / output interface with a backup input / output interface to determine a second transmission link.

[0054] Specifically, by sending a detection signal to the first transmission link, the interface status in the first transmission link is detected. Since the row driver module has both a main input and output interface, when the detection signal is transmitted between the row driver modules through the first transmission link, if it is detected that the main input interface or the main output interface of the current row driver module has an interface failure, the data is transmitted through the corresponding backup input interface or backup output interface of the row driver module; if both the main input interface and the output interface of the row driver module have failures, the detection signal is transmitted through the backup input interface and the backup output interface of the driver module. After the detection signal is successfully transmitted in the entire LED display module, the adjusted transmission link is used as the second communication link for the transmission of the display signal.

[0055] Step S603: driving the LED chip to display via the second transmission link.

[0056] Specifically, after determining the second transmission link, a display signal is obtained from the main control module. The display signal is designed by the host computer and is used to control the lighting or shutting down of the LED lamp beads to form a specific display pattern. The main control module sends the display signal to the LED display module, and sends the display signal to the LED chip through the second transmission link for display.

[0057] Through the above steps, the LED chip driving method of this embodiment sets a main input and output interface and a backup input and output interface for the row driving module, and detects the interface status. When an interface failure is detected, the backup interface is started for signal transmission, thereby improving the system reliability of the LED chip driving.

[0058] In one embodiment, determining the first transmission link includes: obtaining an initialization signal; determining a cascade turning point according to the initialization signal, and determining a connection relationship between the main input and output interfaces of adjacent row driving modules according to the cascade turning point to obtain the first transmission link.

[0059] Specifically, each row driver module is connected to a plurality of LED chips. Between the row driver modules, cascade connection is performed through the main input / output interface and the backup input / output interface of the row driver module. Inside the row driver module, the main input / output interface of the row driver module is connected to the input / output channel of the LED chip. Preferably, the LED chip also has a main input / output channel and a backup input / output channel. After obtaining the initialization signal, the initialization signal performs data cascade transmission between the LED chips connected inside the row driver module, and at the same time, performs data cascade transmission between the row driver modules as a backup input of the designated chip of the next row. The designated chip serves as a cascade turning point. The connection relationship of the main input / output interface between the two row driver modules is determined by the cascade turning point, and further, the cascade relationship of the LED chips between the two row driver modules is determined. By setting the cascade turning point by the initialization signal, the cascade relationship of the corresponding main input / output interfaces between the row driver modules is determined, and the data transmission link is clarified.

[0060] In one embodiment, the detecting the interface status in the first transmission link also includes: transmitting the initialization signal through the first transmission link to assign chip coordinates to the LED chip; acquiring a display signal, the display signal including image information to be displayed in a target area and corresponding LED chip coordinate information; transmitting the display signal through the first transmission link to drive the LED chip for display, the chip coordinates of the LED chip corresponding to the LED chip coordinate information of the display signal.

[0061] Specifically, as the initialization signal is transmitted in the first transmission link, coordinates are assigned to the LED chips passing through. For example: if an X coordinate is set for the LED chip in each row driver module, that is, the X coordinate is automatically accumulated by 1 each time it is cascaded through the main link, that is, the X coordinate inside the row module is 1, 2, ..., n in sequence. A Y coordinate is set for the row driver module, that is, the first LED chip input through the backup channel after the row cascade turning point is used as the module of the next row, that is, the Y coordinate is automatically accumulated by 1 and the second LED chip output of the same row driver module is used as the cascade turning point of the row driver module to connect to the backup input of the next row. The X coordinate is automatically cleared after each row module turning point, and the calculation starts again according to the cascade relationship inside the row module. The coordinate initialization of each chip is completed by calculating once in the X and Y directions.

[0062] After initialization is completed, each LED chip can store the coordinate information of its own chip. When performing signal cascade transmission and display, the first LED chip of the first row driver module receives the image information and corresponding coordinate information required to be displayed in the block from the control card. Each LED chip selects the image data of the current pixel point based on the coordinate information stored inside itself, and cascades the image data of subsequent pixel points to achieve image display of the target image.

[0063] In one embodiment, driving the LED chip for display through the second transmission link includes: obtaining an initialization signal; transmitting the initialization signal through the second transmission link to assign chip coordinates to the LED chip; obtaining a display signal, wherein the display signal includes image information to be displayed in a target area and corresponding LED chip coordinate information; transmitting the display signal through the second transmission link to drive the LED chip for display.

[0064] Specifically, when an interface failure occurs in the first transmission link, the corresponding row driver module switches the backup input and output interface to perform data cascade transmission and determine the second transmission link. After the second transmission link is determined, the second transmission link needs to be initialized based on the initialization signal, and chip coordinates are assigned to each LED chip that the initialization signal passes through during the transmission of the second transmission link, and then a display signal is obtained, and then the display signal is transmitted through the second transmission link, and the LED chip is driven by the row driver module for display.

[0065] In one embodiment, the initialization signal is transmitted through the second transmission link, and after the chip coordinates are assigned to the LED chip, the method includes: obtaining a main display signal and a backup display signal, wherein the main display signal and the backup display signal contain the same information; transmitting the main display signal to the backup input channel of the first LED chip in the first row driving module; transmitting the backup display signal to the main input channel of the first LED chip and the backup input channel of the second LED chip in the first row driving module.

[0066] Specifically, Figure 7 FIG. 1 is a schematic diagram of a row driver module cascade connection according to an LED chip driving method according to an embodiment of the present application. Figure 7As shown, each data display block is composed of multiple row driver modules, and data between row driver modules is cascaded and transmitted. Each row driver module includes a main input interface, a main output interface, a backup input interface, and a backup output interface for data transmission. Each row driver module includes a total of 5 signal interfaces, among which SDI1 is the backup input interface of the first driver chip of the row driver module, SDI2 is the main input interface of the first driver chip of the row driver module, SDI3 is the backup input interface of the second driver chip of the row driver module, LINEN_N+1 is the cascade output of the Nth row, and LINEN_N+1 is the cascade backup output of the Nth row, wherein the driver chip is an LED chip. The main cascade output of the row driver module of the previous row is connected to the first backup interface of the row driver module of the next row, and the backup cascade output is connected to the second backup interface of the module of the next row. When the main input interface or output interface of any row driver module is abnormal, the row driver module can automatically identify and switch to the backup channel to ensure the normal display of the entire row driver module.

[0067] In one embodiment, the step of transmitting the backup display signal to the main input channel of the first LED chip and the backup input channel of the second LED chip in the row driving module includes: sending the backup display signal to the main input channel of the first LED chip of the second row driving module through the main output interface of the first row driving module; sending the backup display signal to the backup input channel of the second LED chip of the second row driving module through the backup output interface of the first row driving module.

[0068] The LED chip driving method of this embodiment sets the main and backup input and output for the row driving module. When the main input and output interface fails, it automatically switches to the backup input and output interface for data transmission, thereby improving the reliability of data transmission, enhancing the stability of LED chip driving, and extending the service life of the LED display module.

[0069] In one embodiment, Figure 8 FIG. 1 is a schematic diagram of the internal chip interconnection of the row driving module of the LED chip driving method according to an embodiment of the present application, such as Figure 8 As shown, the row driver module is composed of multiple cascaded LED chips. The interface style of the LED chip is as follows Figure 3 The output and input of multiple LED chips are cascaded to realize signal transmission. The main input channel of the first LED chip is used as the main input signal of the row driver module, and the output is cascaded to the main input channel of the second LED chip. The output of the second LED chip is cascaded to the main input channel of the third LED chip. The cascaded connection in sequence is the main transmission link of the row driver module.

[0070] The row driver module is designed with a backup transmission link, which is used to automatically switch the link of the abnormal chip when the main transmission link is abnormal. The output channel of each LED chip is connected to the input of up to two LED chips at the same time, among which the output of the first and third LED chips, in addition to cascading the next LED chip, also serves as the backup input link of the fourth and sixth chips respectively, and connects the backup input channel of their chips. In addition to cascading the next LED chip, the output of the second and fourth LED chips, in addition to cascading the next LED chip, also serves as the backup input of the first LED chip in the next row and the backup input of the second chip in the next row respectively. Starting from the fifth LED chip, the output not only cascades the main input of the next chip but also serves as the backup input of the alternate LED chip, that is, the output of the fifth, sixth, and seventh LED chips serves as the backup input of the seventh, eighth, and ninth LED chips respectively, and the cascade is repeated in sequence. By setting up multiple LED chip cascades inside the row driver module, when the cascade link between chips inside the row module is detected to be abnormal, the corresponding LED chip switches to the backup transmission channel for subsequent signal transmission when it recognizes the data of the main transmission channel. In addition, if the chip inside the row driver module is damaged, the pixel display process can be skipped due to the existence of a backup link to ensure that the damage to the LED chip will not affect the display of subsequent pixels, thereby improving the reliability and stability of the LED display unit and the LED display module.

[0071] In one specific embodiment, a method for driving an LED chip is also provided. Fig. 9 is a schematic diagram of a LED chip driving method according to a specific embodiment of the present application, such as Fig. 9 As shown, the method includes:

[0072] Step S901, obtaining an initialization signal.

[0073] Step S902, setting the row driver module cascade turning point.

[0074] Specifically, the main transmission link is initialized according to the initialization signal. A row driver module cascade turning point is set. The row cascade turning point signal performs data cascade transmission in the internal chips of the row module in sequence through the main link, and at the same time serves as a backup input for the first chip of the next row to perform data cascade transmission between row modules. Fig.10 FIG. 1 is a schematic diagram of a row driver module cascade connection of an LED chip driving method according to a specific embodiment of the present application. Fig.10 As shown, each row driving module includes a plurality of LED chips, and the structure of the LED chip is as follows Figure 2 The second LED chip output of each row module is the row cascade turning point, which is used for data cascade transmission backwards through the main link, and at the same time serves as the backup input of the second row for data transmission downwards.

[0075] Step S903: The LED chips determine row and column coordinates according to the master-slave cascade relationship.

[0076] The chips determine their respective coordinates through the cascade relationship between the master and the backup, that is, normal communication is cascaded according to the main link. If an X coordinate is set for each row of chips, that is, each time the main link is cascaded once, the X coordinate automatically accumulates by 1, that is, the X coordinate inside the row module is 1, 2, 3, ..., n. Set a Y coordinate for the row module, that is, the first chip input through the backup channel after the row cascade turning point is used as the module of the next row, that is, the Y coordinate automatically accumulates by 1 and the output of the second chip in the row is used as the row cascade turning point of the row module to connect to the backup input of the next row. The X coordinate is automatically cleared after each row module turning point, and the calculation starts again according to the internal cascade relationship of the row module. Calculate in sequence in the X and Y directions to complete the coordinate initialization of each chip.

[0077] Step S904, receiving block display data;

[0078] Step S905 , the LED chip drives display and cascade transmission according to the coordinates and display image.

[0079] After initialization, each chip can store the coordinate information of the current chip. When performing signal cascade transmission and display, the first chip receives the image information and corresponding coordinate information required to be displayed in the block from the control card. Each chip selects the image data of the current pixel point based on the coordinate information stored in itself, and cascades the image data of subsequent pixel points.

[0080] When a chip or a link is abnormal during the chip cascading process, the chip can obtain backup data through the backup channel to ensure the normal display of the entire link. Three abnormal situations are given as examples. One is the abnormality of the cascade link between chips inside the row module. At this time, the chip recognizes that there is no data in the main link and can switch to the backup link for subsequent signal transmission; the second is that a chip inside the row module is damaged. At this time, due to the existence of the backup link, the pixel can be skipped to ensure that it does not affect the subsequent display pixels; the third is the link abnormality between the row modules, and the row cascade LINE1_2 is abnormal. At this time, it can switch to the LINE1_2_B row backup link to ensure the normal display of subsequent signals.

[0081] It should be noted that the steps shown in the above process or the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0082] In this embodiment, a LED chip driving device is also provided, which is used to implement the above embodiments and preferred implementations, and the descriptions that have been made will not be repeated. The terms "module", "unit", "subunit", etc. used below can implement a combination of software and / or hardware for a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0083] Fig.11 is a structural block diagram of the LED chip driving device of this embodiment, such as Fig.11 As shown, the device comprises:

[0084] An acquisition module 100 is used to determine a first transmission link, wherein the first transmission link includes a main input and output interface of a plurality of row driving modules;

[0085] A detection module 200, configured to detect the interface status in the first transmission link, and if the primary input / output interface fails, replace the corresponding primary input / output interface with a backup input / output interface to determine a second transmission link;

[0086] The processing module 300 is used to drive the LED chip to display through the second transmission link.

[0087] The acquisition module 100 is further used to acquire an initialization signal; determine a cascade turning point according to the initialization signal, determine a connection relationship between the main input and output interfaces of adjacent row driving modules according to the cascade turning point, and obtain the first transmission link.

[0088] The detection module 200 is also used to transmit the initialization signal through the first transmission link to assign chip coordinates to the LED chip; obtain a display signal, the display signal includes image information to be displayed in the target area and corresponding LED chip coordinate information; transmit the display signal through the first transmission link to drive the LED chip to display, and the chip coordinates of the LED chip correspond to the LED chip coordinate information of the display signal.

[0089] The processing module 300 is also used to obtain an initialization signal; transmit the initialization signal through the second transmission link to assign chip coordinates to the LED chip; obtain a display signal, wherein the display signal includes image information to be displayed in the target area and corresponding LED chip coordinate information; transmit the display signal through the second transmission link to drive the LED chip to display, and the chip coordinates of the LED chip correspond to the display signal.

[0090] The processing module 300 is also used to obtain a main display signal and a backup display signal, wherein the main display signal and the backup display signal contain the same information; transmit the main display signal to the backup input channel of the first LED chip in the first row driving module; and transmit the backup display signal to the main input channel of the first LED chip and the backup input channel of the second LED chip in the first row driving module.

[0091] The processing module 300 is also used to send the backup display signal to the main input channel of the first LED chip of the second row driving module through the main output interface of the first row driving module; and send the backup display signal to the backup input channel of the second LED chip of the second row driving module through the backup output interface of the first row driving module.

[0092] It should be noted that the above modules can be functional modules or program modules, and can be implemented by software or hardware. For modules implemented by hardware, the above modules can be located in the same processor; or the above modules can be located in different processors in any combination.

[0093] In this embodiment, an electronic device is further provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0094] Optionally, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor, and the input / output device is connected to the processor.

[0095] Optionally, in this embodiment, the processor may be configured to perform the following steps through a computer program:

[0096] S1, determining a first transmission link, where the first transmission link includes main input and output interfaces of a plurality of row driving modules.

[0097] S2, detecting the interface status in the first transmission link, if the main input / output interface fails, replacing the corresponding main input / output interface with a backup input / output interface, and determining a second transmission link.

[0098] S3, driving the LED chip to display via the second transmission link.

[0099] It should be noted that the specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementation modes, and will not be repeated in this embodiment.

[0100] In addition, in combination with the LED chip driving method provided in the above embodiments, a storage medium may be provided in this embodiment to implement the method. The storage medium stores a computer program; when the computer program is executed by a processor, any one of the LED chip driving methods in the above embodiments is implemented.

[0101] It should be understood that the specific embodiments described herein are only used to explain the application, rather than to limit it. Based on the embodiments provided in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of this application.

[0102] Obviously, the drawings are only some examples or embodiments of the present application. For ordinary technicians in the field, the present application can also be applied to other similar situations based on these drawings without creative work. In addition, it is understandable that although the work done in this development process may be complicated and lengthy, for ordinary technicians in the field, certain changes in design, manufacturing or production based on the technical content disclosed in this application are only conventional technical means and should not be regarded as insufficient content disclosed in this application.

[0103] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0104] The term "embodiment" in this application refers to a specific feature, structure or characteristic described in conjunction with the embodiment that can be included in at least one embodiment of the present application. The appearance of this phrase in various locations in the specification does not necessarily mean the same embodiment, nor does it mean that it is mutually exclusive with other embodiments and is independent or optional. It is clearly or implicitly understood by those of ordinary skill in the art that the embodiments described in this application can be combined with other embodiments without conflict.

[0105] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of patent protection. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the attached claims.

Claims

1. A method for driving an LED chip, applied to an LED display module, wherein the LED display module comprises an LED chip and a row driving module, wherein the row driving module is used to receive and transmit a display signal and drive the LED chip to display, wherein: include: Determine a first transmission link, wherein the first transmission link includes main input and output interfaces of a plurality of row driving modules and a cascade relationship between the input and output interfaces; The LED display module includes a plurality of row drive modules, each row drive module corresponds to a plurality of LED chips; Detecting the interface status in the first transmission link, if the main input / output interface fails, replacing the corresponding main input / output interface with a backup input / output interface to determine a second transmission link; Driving the LED chip to display via the second transmission link; The determining the first transmission link comprises: Get the initialization signal; Determine a cascade turning point according to the initialization signal; The connection relationship between the main input and output interfaces of the adjacent row driving modules is determined according to the cascade turning point to obtain the first transmission link.

2. The LED chip driving method according to claim 1, characterized in that: The detecting the interface status in the first transmission link further comprises: Transmitting the initialization signal through the first transmission link to assign chip coordinates to the LED chip; Acquire a display signal, wherein the display signal includes image information required to be displayed in the target area and corresponding LED chip coordinate information; The display signal is transmitted through the first transmission link to drive the LED chip to display, and the chip coordinates of the LED chip correspond to the LED chip coordinate information of the display signal.

3. The LED chip driving method according to claim 1, characterized in that: The driving of the LED chip to display through the second transmission link comprises: Get the initialization signal; Transmitting the initialization signal through the second transmission link to assign chip coordinates to the LED chip; Acquire a display signal, wherein the display signal includes image information required to be displayed in the target area and corresponding LED chip coordinate information; The display signal is transmitted through the second transmission link to drive the LED chip to display.

4. The LED chip driving method according to claim 3, characterized in that: The step of transmitting the initialization signal through the second transmission link and assigning chip coordinates to the LED chip comprises: Acquire a main display signal and a backup display signal, wherein the main display signal and the backup display signal contain the same information; Transmitting the main display signal to a backup input channel of a first LED chip in a first row driving module; The backup display signal is transmitted to a main input channel of a first LED chip and a backup input channel of a second LED chip in the first row driving module.

5. The LED chip driving method according to claim 4, characterized in that: After transmitting the backup display signal to the main input channel of the first LED chip and the backup input channel of the second LED chip in the row driving module, the method includes: Sending the backup display signal to the main input channel of the first LED chip of the second row driving module through the main output interface of the first row driving module; The backup display signal is sent to the backup input channel of the second LED chip of the second row driving module through the backup output interface of the first row driving module.

6. An LED chip driving device, characterized in that: include: An acquisition module, configured to determine a first transmission link, wherein the first transmission link includes main input and output interfaces of a plurality of row driving modules and a cascade relationship between the input and output interfaces; The LED display module includes a plurality of row drive modules, each row drive module corresponds to a plurality of LED chips; a detection module, configured to detect the interface status in the first transmission link, and if the primary input / output interface fails, replace the corresponding primary input / output interface with a backup input / output interface to determine a second transmission link; A processing module, used for driving the LED chip to display through the second transmission link; The determining the first transmission link comprises: Get the initialization signal; Determine a cascade turning point according to the initialization signal; The connection relationship between the main input and output interfaces of the adjacent row driving modules is determined according to the cascade turning point to obtain the first transmission link.

7. An LED display system, characterized in that: The LED display system includes a main control module and an LED display module, wherein the main control module is connected to the LED display module, The LED display module includes an LED chip and a row driving module, wherein the row driving module is used to receive and transmit display signals and drive the LED chip to display; The main control module is used to implement the LED chip driving method according to any one of claims 1 to 5.

8. An LED display unit, characterized in that: include: A data main input channel, a data backup input channel, a red LED chip main power supply channel, a blue-green LED chip main power supply channel, a red LED chip backup power supply channel, a blue-green LED chip backup power supply channel, a data cascade output channel and a ground channel; the LED display unit also includes a driver chip and multiple RGB pixel points, and the RGB pixel points are arranged around the periphery of the driver chip.

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