Single-wire communication output multiplexing driving circuit and method, and display system

Abstract

A single-wire communication output multiplexing driving circuit and method, and a display system. The driving circuit comprises: a controller (11) and at least one driver group (12); each driver group (12) comprises: a plurality of drivers communicatively connected in sequence from a first driver (121) to a last driver (122); the controller (11) comprises: an output port (111) and a readback port (112); the output port (111) is communicatively connected to the first driver (121), and the readback port (112) is communicatively connected to the last driver (122); the output port (111) is used for sending a communication signal and an interrupt signal of the controller (11) to the first driver (121), so that the communication signal and the interrupt signal sequentially pass through each driver of the driver group (12); and the last driver (122) is used for generating readback data and interrupt information in response to the communication signal and the interrupt signal, and transmitting same back to the readback port (112). The last driver (122) can not only be a slave, but also be a master, thereby reducing the amount of data processing of the controller (11), and then reducing the model selection limitations on the controller (11) and reducing costs.

Description

Single-wire communication output multiplexing driving circuit, display system and method TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, in particular to a single-wire communication output multiplexing driving circuit, display system and method. BACKGROUND

[0002] The display system contains a large number of LED units, which can be arranged in an array in a display area, and the operation of each LED unit needs to be driven by a corresponding driver, and the operation of the driver needs to be implemented by a controller, and a plurality of drivers correspond to one controller.

[0003] In the prior art, the controller and the driver are in a master-slave mode, the controller is the master, initiates state readback, and all drivers are slaves, and only in the case that the controller initiates state readback, readback data is generated. In order to ensure the normal operation of the display system, the controller needs to read back the working state of all drivers in real time, and the data processing amount is very large. SUMMARY

[0004] The present application provides a single-wire communication output multiplexing driving circuit, display system and method to solve the problem of large processing amount of the controller in the prior art.

[0005] To solve the above technical problems, the present application is realized by the following technical scheme:

[0006] According to the first aspect of the present application, a single-wire communication output multiplexing driving circuit is provided, comprising: a controller, at least one driver group; wherein,

[0007] Each of the driver groups comprises: a plurality of drivers connected in series from a first level driver to a last level driver;

[0008] The controller comprises: an output port, a readback port; the output port is in communication connection with the first driver, and the readback port is in communication connection with the last driver; the output port, the first driver to the last driver and the readback port form a serial link in sequence;

[0009] The output port is used to send the communication signal and the interrupt signal of the controller to the first driver, so that the communication signal and the interrupt signal pass through each driver of the driver group in sequence;

[0010] The driver before the last level driver is used to generate readback data in response to the communication signal and the interrupt signal, and transmit the readback data through the serial link;

[0011] The last-stage driver is configured to generate read-back data in a communication mode in response to the communication signal, and is configured to select a corresponding interrupt mode in response to the interrupt signal and generate interrupt information in the interrupt mode to the controller; and transmit the read-back data and the interrupt information to the read-back port through the serial link.

[0012] Optionally, the output port is a multiplexed output port.

[0013] Optionally, the last-stage driver comprises a signal identification module configured to identify the received signal so that the last-stage driver makes a corresponding response.

[0014] Optionally, the last-stage driver comprises a plurality of communication signal transceiving modules, and the signal formats of the plurality of communication signal transceiving modules are different.

[0015] Optionally, the last-stage driver comprises a communication signal selection module configured to select between the plurality of communication signal transceiving modules.

[0016] Optionally, the signal formats of the plurality of communication signal transceiving modules comprise a general format and a private format.

[0017] Optionally, the number of the interrupt modes in the last-stage driver is a plurality.

[0018] Optionally, the last-stage driver comprises an interrupt mode selection module configured to select between a plurality of interrupt modes.

[0019] Optionally, the interrupt modes comprise an under-voltage mode, an open-circuit detection mode and a short-circuit detection mode.

[0020] According to a second aspect of the present application, there is provided a display system comprising: a plurality of light emitting element regions, a single-wire communication output multiplexed driving circuit;

[0021] The single-wire communication output multiplexed driving circuit is any one of the single-wire communication output multiplexed driving circuits described above.

[0022] The light emitting element regions correspond one-to-one to the drivers.

[0023] According to a third aspect of the present application, there is provided a single-wire communication output multiplexed driving method comprising:

[0024] transmitting a communication signal to a driver group through single-wire communication; wherein the driver group comprises a plurality of drivers connected in series from a first-stage driver to a last-stage driver.

[0025] The driver before the last stage driver generates readback data in response to the communication signal and transmits the readback data through the single-wire communication;

[0026] The last stage driver generates readback data in the communication mode in response to the communication signal and transmits the readback data.

[0027] An interrupt signal is sent to the driver group through the single-wire communication;

[0028] The driver before the last stage driver generates readback data in response to the interrupt signal and transmits the readback data through the single-wire communication;

[0029] The last stage driver selects a corresponding interrupt mode in response to the interrupt signal, generates interrupt information in the interrupt mode, and transmits the interrupt information.

[0030] The single-wire communication output multiplexing driving circuit, the display system, and the method provided by the application can send a communication signal and an interrupt signal to the driver, and the controller and the driver can be in a master-slave mode. The controller sends a communication signal to the driver, at which time all the drivers are slaves. Only when the controller sends a communication signal, the driver generates readback data and transmits the readback data back to the controller. The last stage driver can also be a master. When the controller sends an interrupt signal to the driver, the last stage driver becomes a master and no longer generates readback data based on the readback signal of the controller. Instead, the last stage driver generates interrupt information in a corresponding interrupt mode and transmits the interrupt information back to the controller only when a trigger condition corresponding to the interrupt mode occurs in the driver group. In the interrupt mode, the last stage driver automatically determines whether a trigger condition corresponding to the interrupt mode occurs in the driver group. If not, the last stage driver does not transmit data back. If so, the last stage driver transmits data back, which reduces the data processing amount of the controller, reduces the selection limit of the controller, and reduces the cost. The output multiplexing of the serial link is realized, and various output modes are realized.

[0031] In addition, the single-wire communication output multiplexing driving circuit, the display system, and the method provided by the application realize the selection of the communication mode and the interrupt mode through the last stage driver of each driver group. Except for the last stage driver, the other drivers are always in the single-wire communication mode. Even in the interrupt mode, the brightness information and other information can be transmitted through the single-wire communication. Therefore, the application can realize the transmission of readback information and the transmission of command information (such as brightness information) through the single-wire communication.

[0032] In an optional solution of the present application, the communication signal and the interrupt signal of the controller are realized through the same output port (multiplexing output port), and each driver group (i.e. each row of drivers) only needs to correspond to one output port, the requirement for the number of terminals of the controller is relatively low, further reducing the selection limitation of the controller and reducing the cost of the controller.

[0033] In an optional solution of the present application, the last-stage driver comprises: a plurality of communication signal transceiving modules; the signal formats of the plurality of communication signal transceiving modules are different, and can transmit a plurality of communication signals of different formats, and are suitable for a wide range of applications.

[0034] In an optional solution of the present application, the signal formats of the plurality of communication signal transceiving modules comprise: a general format and a private format; under the general format, the controller is relatively simple in interpreting the read-back information, and even does not need to interpret, thereby saving time; and under the private format, different requirements of different users can be adapted. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0036] Fig. 1 is a schematic diagram of a single-wire communication output multiplexing driving circuit according to an embodiment of the present application;

[0037] Fig. 2 is a schematic diagram of a communication signal selection module according to an embodiment of the present application;

[0038] Fig. 3 is a schematic diagram of an interrupt mode selection module according to an embodiment of the present application;

[0039] Fig. 4 is a schematic diagram of a signal identification module according to a preferred embodiment of the present application;

[0040] Fig. 5 is a flow chart of a single-wire communication output multiplexing driving method according to an embodiment of the present application;

[0041] Fig. 6 is a flow chart of a single-wire communication output multiplexing driving method according to an embodiment of the present application;

[0042] Legend of reference numerals: 11-controller, 111-output port, 112-read-back port; 12-driver group; 121-first-stage driver, 122-last-stage driver; 1221-communication signal selection module; 1222-interrupt mode selection module; 1223-multiplexer. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0044] In the description of the specification of the present application, it should be understood that the terms "upper", "lower", "upper end", "lower end", "lower surface", "upper surface" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0045] In the description of the specification of the present application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features.

[0046] In the description of the present application, the meaning of "a plurality of" is a plurality, for example, two, three, four, etc., unless otherwise explicitly specified and limited.

[0047] In the description of the specification of the present application, unless otherwise explicitly specified and limited, the terms "connection" and the like should be broadly understood, for example, it can be fixedly connected, or detachably connected, or integrated; it can be mechanically connected, or electrically connected or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] The technical solutions of the present application will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described in some embodiments.

[0049] In an embodiment, a single-wire communication output multiplexing driving circuit is provided, as shown in FIG. 1, which comprises a controller 11 and at least one driver group 12. Each driver group 12 comprises a plurality of drivers connected in series, from a first driver 121 to a last driver 122. The controller 11 comprises an output port 111 and a read-back port 112. The output port 111 is connected to the first driver 121, and the read-back port 112 is connected to the last driver 122. That is, the output port 111, the first driver 121 to the last driver 122, and the read-back port 112 form a serial link. The output port 111 is used to send a command signal of the controller, such as a communication signal and an interrupt signal, to the first driver 121, so that the communication signal and the interrupt signal pass through each driver of the driver group in turn. The read-back port 112 is used to receive read-back data and interrupt information transmitted back through the serial link.

[0050] The drivers before the last driver (assuming M drivers, the first M-1 drivers) are used to generate read-back data in response to the communication signal and the interrupt signal, and transmit the read-back data through the serial link until the last driver. The signal received by the last driver is the signal including the read-back data of the first M-1 drivers. The last driver is used to generate read-back data in the communication mode in response to the communication signal, and transmit the read-back data back to the controller through the serial link. At this time, all the drivers are in slave mode. The last driver is also used to select a corresponding interrupt mode in response to the interrupt signal, and generate interrupt information in the interrupt mode to the controller, and transmit the interrupt information back to the controller through the serial link. At this time, the last driver is in master mode, and no longer reads back based on the read-back signal of the controller, but only when the trigger condition of the interrupt mode of the driver group to which the last driver belongs is met, the last driver actively generates and transmits the interrupt information back to the controller. In the interrupt mode, the controller no longer needs to read back the status of all the drivers in real time. The last driver automatically judges whether the trigger condition of the interrupt mode of the driver group to which the last driver belongs is met. If not, the last driver does not transmit data back. If yes, the last driver transmits data back, which reduces the data processing amount of the controller. In the single-wire communication output multiplexing driving circuit, the drivers in each driver group are connected through single-wire communication. The first M-1 drivers are always in single-wire communication mode. Even in the interrupt mode, the single-wire communication can still realize the transmission of brightness information and the like, so that the transmission of read-back information and the transmission of driving information (such as brightness information) can be realized through single-wire communication.

[0051] The signal response in the last driver in FIG. 1 is only used to illustrate the working process of the last driver, and is not necessarily a real module.

[0052] In FIG. 1, only one group of driver groups 12 is shown. In different embodiments, the same controller can correspond to at least two groups of driver groups, and can also correspond to more than two groups of driver groups. Different groups of drivers can be distributed in the form of rows. Of course, in different embodiments, different groups of drivers can also be distributed in the form of columns, or can also be distributed in other forms (for example, in the form of regionalization, and how the regions are divided is not limited). Here, no longer be repeated.

[0053] In an embodiment, the output port is a multiplexed output port, and the communication signal and the interrupt signal of the controller are implemented through the same output port.

[0054] In the prior art, the output terminals of the controller corresponding to the driver are different, and different outputs often correspond to different output terminals. For example, two different outputs (for example, sending of dimming data and reading of status) require two output terminals, that is, each row of drivers needs to correspond to two output terminals. A display system often includes many rows of drivers, and the number of terminals of the controller has a relatively large requirement. This limits the selection of the controller and has a high cost. In the above embodiment of the present application, the communication signal and the interrupt signal of the controller are implemented through the same output port (multiplexed output port). Each group of drivers (that is, each row of drivers) only needs to correspond to one output port. The number of terminals of the controller has a relatively small requirement, reduces the selection limitation of the controller, and reduces the cost of the controller.

[0055] In an embodiment, whether the controller sends a communication signal or an interrupt signal can be implemented through different command formats, and can be set to select whether to send a communication signal or an interrupt signal.

[0056] In an embodiment, when the last-stage driver receives the signal output by the output port 111, the signal can be identified to make the driver respond accordingly. When the signal is identified as a communication signal, the last-stage driver generates the read-back data in the communication mode. When the signal is identified as an interrupt signal, the last-stage driver generates the interrupt information in the interrupt mode. The signal identification can be implemented through a signal identification module. Different signals can be distinguished through different signal formats. Correspondingly, the signal identification module can identify the signal according to the format of the signal.

[0057] In an embodiment, the last-stage driver includes a plurality of communication signal transceiving modules, and the signal formats of the plurality of communication signal transceiving modules are different.

[0058] In an embodiment, the last-stage driver includes a communication signal selection module 1221, please refer to FIG. 3. The communication signal selection module is used to select between the plurality of communication signal transceiving modules. In FIG. 3, the communication signal includes two signal formats as an example. Specifically, the communication signal includes a first communication signal and a second communication signal.

[0059] In an embodiment, the signal formats of the plurality of communication signal transceiver modules can include a general format and a private format. The general format can be, for example, a UART communication protocol format. When the UART communication protocol is used, since the controller has an embedded UART slave decoding module, the working status of the driver can be known without additional resources for parsing the read-back information, time is saved, and the performance requirement of the controller is low. The private format can meet different needs of users.

[0060] As an implementation, the signal recognition and communication signal selection can be realized by two-stage modules. First, it is identified whether the signal is a communication signal or an interrupt signal. When it is identified as a communication signal, selection is then performed among the plurality of communication signal transceiver modules.

[0061] As another implementation, the signal recognition and communication signal selection can also be realized by the same module. That is, the signal recognition module and the communication signal selection module are the same module, the plurality of communication signal transceiver modules and the interrupt signal are inputs, and selection is directly performed among the plurality of communication signal transceiver modules and the interrupt signal.

[0062] In an embodiment, the number of interrupt modes in the last-stage driver can be multiple, such as including a driving voltage undervoltage mode, an open circuit detection mode, a short circuit detection mode, and the like.

[0063] In an embodiment, the last-stage driver includes an interrupt mode selection module 1222, which is configured to select among a plurality of interrupt modes. Please refer to FIG. 4, which shows an example in which the last-stage driver includes three interrupt modes: a first interrupt mode, a second interrupt mode, and a third interrupt mode.

[0064] As an implementation, the signal recognition and interrupt mode selection can be realized by two-stage modules. First, it is identified whether the signal is a communication signal or an interrupt signal. When it is identified as an interrupt signal, selection is then performed among the plurality of interrupt modes.

[0065] As another implementation, the signal recognition and interrupt mode selection can also be realized by the same module. That is, the signal recognition module and the interrupt mode selection module are the same module, the communication signal and the plurality of interrupt modes are inputs, and selection is directly performed among the communication signal and the plurality of interrupt modes.

[0066] It should be understood that when the communication signal includes multiple and the interrupt mode also includes multiple, the selection of the communication signal and the interrupt mode can be realized by a multi-stage selection module, such as: first identifying whether it is a communication signal or an interrupt signal, when identifying as a communication signal, then selecting between multiple communication signal transceiver modules, when identifying as an interrupt signal, then selecting between multiple interrupt modes. Of course, it can also be realized by a one-stage selection module, that is, the signal identification module, the communication signal selection module, and the interrupt mode selection module are the same module, and multiple communication signal transceiver modules and multiple interrupt modes are inputted, and the selection is directly made between multiple communication signal transceiver modules and multiple interrupt modes. Please refer to FIG. 5, the same module described above can be realized by a multiplexer.

[0067] In different embodiments, the signal identification of the last-stage driver, the selection of multiple communication modes, and the selection of multiple interrupt modes can also be realized without the above-described modules, such as: realized by a program.

[0068] Practically, the selection of the communication signal and the interrupt signal can be selected according to time setting, such as setting what time to select the communication signal and what time to select the interrupt signal; or selected based on the needs of the user, such as the user can select through a control command.

[0069] In an embodiment, the output port of the last-stage driver can also be a multiplexed output port, and multiple different output forms can be realized through the same port, such as: the read-back data under the first communication signal, the read-back data under the second communication signal, and the interrupt information.

[0070] In an embodiment, a display system is also provided, which includes: a plurality of light emitting element areas and a single-wire communication output multiplexed driver. The single-wire communication output multiplexed driver is the single-wire communication output multiplexed driver described in any of the above embodiments; and the light emitting element areas correspond to the drivers one by one.

[0071] In an embodiment, a single-wire communication output multiplexed driving method is also provided, please refer to FIG. 5, which includes:

[0072] S11: sending a communication signal to a driver group through single-wire communication; wherein the driver group includes: a plurality of drivers connected in series from the first-stage driver to the last-stage driver;

[0073] S12: the driver before the last-stage driver generates read-back data in response to the communication signal and transmits through single-wire communication;

[0074] S13: the last-stage driver generates read-back data in the communication mode in response to the communication signal and transmits back.

[0075] In one embodiment, a single-wire communication output multiplexing driving method is also provided, as shown in FIG. 6, which includes:

[0076] S21: sending an interrupt signal to the driver group through single-wire communication;

[0077] S22: the driver before the last-stage driver generates back-reading data in response to the interrupt signal and transmits through single-wire communication;

[0078] S23: the last-stage driver selects corresponding interrupt mode in response to the interrupt signal, generates interrupt information in the interrupt mode, and transmits back. In the interrupt mode, the last-stage driver automatically judges whether the driver group where it is located has the trigger condition corresponding to the interrupt mode, and if not, it does not transmit back data, and if yes, it transmits back data.

[0079] In the description of the present specification, the description of the terms "one embodiment", "one example", "specific implementation process", "one example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0080] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A single-wire communication output multiplexing driver circuit, characterized in that, The application relates to a single-wire communication output multiplexing driving circuit and a method for sending a communication signal and an interrupt signal to a driving group through single-wire communication. The application relates to a single-wire communication output multiplexing driving circuit and a method for sending a communication signal and an interrupt signal to a driving group through single-wire communication. 3.[According to Rule 26, correct 23.04.2025] The last-stage driving device comprises a signal identification module, which is used for identifying the received signal so that the last-stage driving device makes a corresponding response. The last-stage driving device comprises a plurality of communication signal transceiving modules, and the signal formats of the plurality of communication signal transceiving modules are different. The last-stage driving device comprises a communication signal selection module, which is used for selecting among the plurality of communication signal transceiving modules. The signal formats of the plurality of communication signal transceiving modules comprise a general format and a private format.

2. The single-wire communication output multiplexing drive circuit according to claim 1, characterized by, The number of the interrupt modes in the last-stage driving device is multiple. The last-stage driving device comprises an interrupt mode selection module, which is used for selecting among the plurality of interrupt modes.

3. [Amended pursuant to Rule 26 23.04.2025] The single wire communication output multiplex drive circuit according to claim 1, characterized in that, The application relates to a single-wire communication output multiplexing driving circuit and a method for sending a communication signal and an interrupt signal to a driving group through single-wire communication.

4. [Amended according to Rule 26 23.04.2025] The single wire communication output multiplex drive circuit according to claim 1, characterized in that, The application relates to a single-wire communication output multiplexing driving circuit and a method for sending a communication signal and an interrupt signal to a driving group through single-wire communication.

5. The single-wire communication output multiplexing drive circuit according to claim 4, characterized by The application relates to a single-wire communication output multiplexing driving circuit and a method for sending a communication signal and an interrupt signal to a driving group through single-wire communication.

6. The single wire communication output multiplexing drive circuit according to claim 5, wherein, ​ 7. The single wire communication output multiplexing drive circuit according to claim 1, wherein ​ 8. The drive circuit according to claim 7, characterized in that, ​ 9. A display system characterized by, ​ ​ ​ ​ 10. A single-wire communication output multiplex drive method, characterized by, ​ ​ ​ ​ ​ ​ The last stage driver selects a corresponding interrupt mode in response to the interrupt signal, generates interrupt information in the interrupt mode, and returns.

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