LED driving chip control method and device, electronic equipment and medium

Abstract

The invention provides an LED driving chip control method. The LED driving chip control method comprises the steps that a driving chip receives a first selection control signal and a second selection control signal; the driving chip delays the second selection control signal for a first number of work cycles, and mixes the first selection control signal and the delayed second selection control signal to obtain a target control signal; the first number is obtained by subtracting 1 from the sequence number difference between the signal source of the second selection control signal and the driving chip; the driving chip outputs a third selection control signal after performing delay processing on the target control signal, and obtains target control data from the data bus according to the target control signal; and the driving chip caches the target control data and generates a driving current signal according to the target control data. According to the invention, breakpoint-free transmission of the LED driving signal is realized, and the operation stability of LED equipment is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of LED control technology, and in particular to an LED driver chip control method, device, electronic device and medium. Background Art

[0002] At present, many electronic products have lighting effect configuration requirements, connecting multiple LEDs in series and centrally configuring lighting effects. In order to achieve more color effects, each independent LED is required to have an independent driver chip. Each independent LED driver chip has an addressable function and can realize point-to-point programming. Through the control chip of each lamp bead, different visual effects can be achieved in a programming way, presenting more color effects while also being able to keep in sync with the system.

[0003] In the prior art, when a fault occurs in an LED circuit, it often causes a failure in the overall operation of the device. After the fault point is analyzed through operating data or fault information to determine the faulty node, the normal operation of the device is restored after repair. Summary of the invention

[0004] The disclosed embodiments at least provide a method for controlling an LED driver chip, which can realize breakpoint-free transmission of the LED driver signal by mixing the control signal sent by the previous driver chip and the control signal received by the first selection signal input terminal of the previous driver chip through the driver chip.

[0005] The embodiment of the present disclosure provides a method for controlling an LED driver chip, which is applied to an LED driver circuit based on a bus structure. The driver chip includes a first selection signal input terminal, a second selection signal input terminal, a data receiving terminal, a selection signal output terminal, and a driving current output terminal. The method includes: The driving chip receives a first selection control signal and a second selection control signal; the first selection control signal is a signal received by the first selection signal input terminal; the second selection control signal is a signal received by the second selection signal input terminal; The driver chip delays the second selection control signal by a first number of working cycles, and mixes the first selection control signal with the delayed second selection control signal to obtain a target control signal; the first number is the difference between the sequence numbers of the signal source of the second selection control signal and the driver chip minus 1; The driver chip outputs a third selection control signal after delaying the target control signal, and obtains the target control data from the data bus according to the target control signal; The driver chip caches the target control data and generates a drive current signal according to the target control data.

[0006] In some embodiments, the driving chip includes a delay operation module, a selection signal generation module, a delay output module, a data selection module, a latch module and an LED driving module.

[0007] In some embodiments, the first selection signal input terminal is connected to the selection signal generation module, the second selection signal input terminal is connected to the delay operation module, the data receiving terminal is connected to the data selection module, the selection signal output terminal is connected to the delay output module, and the driving current output terminal is connected to the LED driving module.

[0008] In some embodiments, the first selection control signal is mixed with the delayed second selection control signal to obtain a target control signal, including: If the first selection control signal is at a high level and the second selection control signal after the delay is at a low level, the first selection control signal is determined as the target control signal; If the first selection control signal is at a low level, and the delayed second selection control signal is at a high level, the delayed second selection control signal is determined as the target control signal; If the first selection control signal is at a low level, and the second selection control signal after delay is at a low level, the target control signal is at a low level.

[0009] In some embodiments, it also includes: when the first number is greater than 0, fault information is generated and stored in a fault buffer; the fault information includes the first number and the serial number of the driver chip.

[0010] The embodiment of the present disclosure also provides an LED driver chip control device, which is applied to an LED driver circuit based on a bus structure. The driver chip includes a first selection signal input terminal, a second selection signal input terminal, a data receiving terminal, a selection signal output terminal and a driving current output terminal. The device includes: A signal receiving module, used for driving the chip to receive a first selection control signal and a second selection control signal; the first selection control signal is a signal received by the first selection signal input terminal; the second selection control signal is a signal received by the second selection signal input terminal; A signal selection module, used for driving the chip to delay the second selection control signal by a first number of working cycles, and to mix the first selection control signal with the delayed second selection control signal to obtain a target control signal; the first number is the difference between the sequence number of the signal source of the second selection control signal and the driving chip minus 1; A signal sending module, used for driving the chip to output a third selection control signal after delay processing of the target control signal, and to obtain target control data from the data bus according to the target control signal; The driving module is used to drive the chip to cache the target control data and generate a driving current signal according to the target control data.

[0011] In some embodiments, the signal selection module is specifically used to determine the first selection control signal as the target control signal if the first selection control signal is high and the second selection control signal after delay is low; if the first selection control signal is low and the second selection control signal after delay is high, then determine the second selection control signal after delay as the target control signal; if the first selection control signal is low and the second selection control signal after delay is low, then the target control signal is low.

[0012] In some embodiments, a fault module is further included, which is used to generate fault information and store it in a fault buffer when the first number is greater than 0; the fault information includes the first number and the serial number of the driver chip.

[0013] An embodiment of the present disclosure also provides an electronic device, including: a processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor communicates with the memory via the bus, and when the machine-readable instructions are executed by the processor, the LED driver chip control method or steps in any possible implementation of the LED driver chip control method are executed.

[0014] The embodiment of the present disclosure further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the above-mentioned LED driver chip control method or the steps in any possible implementation of the above-mentioned LED driver chip control method are executed.

[0015] The embodiments of the present disclosure also provide a computer program product, including a computer program / instruction, which, when executed by a processor, implements the above-mentioned LED driver chip control method, or the steps in any possible implementation of the above-mentioned LED driver chip control method.

[0016] The embodiment of the present disclosure provides a method for controlling an LED driver chip, which can perform mixed calculation driving on the control signal sent by the previous driver chip and the control signal received by the first selection signal input terminal of the previous driver chip, so as to realize the breakpoint-free transmission of the LED drive signal and improve the stability of the operation of the LED device.

[0017] In order to make the above-mentioned objectives, features and advantages of the present disclosure more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following is a brief introduction to the drawings required for use in the embodiments. The drawings herein are incorporated into the specification and constitute a part of the specification. These drawings illustrate embodiments consistent with the present disclosure and are used together with the specification to illustrate the technical solutions of the present disclosure. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can also be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic diagram of a LED driving circuit based on a bus structure provided by an embodiment of the present disclosure is shown; Figure 2 A flow chart of a method for controlling an LED driver chip provided by an embodiment of the present disclosure is shown; Figure 3 A schematic diagram of an LED driver chip provided by an embodiment of the present disclosure is shown; Figure 4 A schematic diagram of an LED driver chip control device provided by an embodiment of the present disclosure is shown; Figure 5 A schematic diagram of an electronic device provided by an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present disclosure clearer, the technical scheme in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. The components of the embodiments of the present disclosure generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present disclosure provided in the drawings is not intended to limit the scope of the present disclosure for protection, but merely represents the selected embodiments of the present disclosure. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present disclosure.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0022] The term "and / or" herein only describes an association relationship, indicating that three relationships may exist. For example, A and / or B may represent the following three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the term "at least one" herein represents any combination of at least two of any one or more of a plurality of. For example, including at least one of A, B, and C may represent including any one or more elements selected from the set consisting of A, B, and C.

[0023] After research, it is found that in the prior art, when a fault occurs in the LED circuit, it often causes the overall operation of the device to fail. After the fault point is analyzed through operation data or fault information to determine the fault node, the normal operation of the device is restored after repair. The period from equipment failure, fault discovery to repair will affect the normal use of the device. The purpose of this application is to find a new way to enable LED devices to achieve breakpoint-free transmission of driving signals.

[0024] Based on the above research, the present disclosure provides a method, device, electronic device and storage medium for controlling an LED driver chip. The driver chip performs mixed driving on the control signal sent by the previous-level driver chip and the control signal received by the first selection signal input terminal of the previous-level driver chip, thereby realizing breakpoint-free transmission of the LED drive signal.

[0025] To facilitate understanding of this embodiment, a LED driver chip control method disclosed in the embodiment of the present disclosure is first introduced in detail. The execution subject of the LED driver chip control method provided in the embodiment of the present disclosure is generally a computer device with certain computing capabilities, and the computer device includes, for example: a terminal device or a server or other processing device, and the terminal device can be a user equipment (User Equipment, UE), a mobile device, a user terminal, a terminal, a cellular phone, a cordless phone, a personal digital assistant (Personal Digital Assistant, PDA), a handheld device, a computing device, a vehicle-mounted device, a wearable device, etc. In some possible implementations, the LED driver chip control method can be implemented by a processor calling a computer-readable instruction stored in a memory.

[0026] like Figure 1 As shown, Figure 1 The LED driving circuit based on bus structure used in the LED driving chip control method provided in the embodiment of the present disclosure includes N cascaded LED driving chips (C1, C2, C3...C N) and a data bus 101 that runs through the entire system. Each LED driver chip has a data receiving terminal DATA (102), two selection signal input terminals IN0 (103) and IN1 (104), and a selection signal output terminal (105). Driving a level of LED requires n-bit data width, so the data bus 101 contains N n-bit driving data.

[0027] like Figure 2 As shown, Figure 2 A flowchart of a method for controlling an LED driver chip provided by an embodiment of the present disclosure is applied to an LED driver circuit based on a bus structure. The driver chip includes a first selection signal input terminal, a second selection signal input terminal, a data receiving terminal, a selection signal output terminal, and a driving current output terminal. The method includes: S101, the driving chip receives a first selection control signal and a second selection control signal; the first selection control signal is a signal received by the first selection signal input terminal; the second selection control signal is a signal received by the second selection signal input terminal; S102, the driver chip delays the second selection control signal by a first number of working cycles, and mixes the first selection control signal with the delayed second selection control signal to obtain a target control signal; the first number is the difference between the sequence numbers of the signal source of the second selection control signal and the driver chip minus 1; S103, the driver chip outputs a third selection control signal after delaying the target control signal, and obtains target control data from the data bus according to the target control signal; S104 , the driving chip caches the target control data and generates a driving current signal according to the target control data.

[0028] Specifically, for ease of understanding, Figure 1 The first selection control signal is sel2 output from the selection signal output terminal OUT of the driving chip C2, and the second selection control signal is sel1 output from the selection signal output terminal OUT of the driving chip C1.

[0029] Then, the driver chip C3 will delay the received sel1, and the delay duration is based on the working cycle of each LED driver chip as the unit working cycle. The number of delay cycles is the difference between the chip serial number of the signal source C2 of sel1 and the current driver chip C3 minus 1. After the delay processing of sel1 last night, the delayed sel1 and sel2 are mixed to determine the target control signal used by C3 to drive the corresponding LED. The signal segment corresponding to the current driver chip is used for the mixing here. For example, the current driver chip C3 uses the third segment n bit signal of sel1 and sel2.

[0030] After determining the target control signal, the driver chip C3 sends the third selection control signal sel3 obtained after delaying the target control signal through the selection signal output terminal. At the same time, the driver chip C3 intercepts the corresponding target control data from the driving data in the data bus 101 according to the target control signal.

[0031] Finally, the driver chip C3 caches the target control data, and converts the target control data into a driving current signal and sends it to LED3, so that LED3 is lit according to the target control data.

[0032] In some embodiments, Figure 3 As shown, the driving chip 20 includes a delay operation module 201 , a selection signal generation module 202 , a delay output module 207 , a data selection module 203 , a latch module 205 , an LED driving module 206 , and a data receiving terminal 204 .

[0033] The first selection signal input terminal IN0 is connected to the selection signal generating module 202, the second selection signal input terminal IN1 is connected to the delay operation module 201, the data receiving terminal 204 is connected to the data selection module 203, the selection signal output terminal OUT is connected to the delay output module 207, and the driving current output terminal LED is connected to the LED driving module 206.

[0034] In some embodiments, in S102, the first selection control signal is mixed with the delayed second selection control signal to obtain a target control signal, including: If the first selection control signal is at a high level and the second selection control signal after the delay is at a low level, the first selection control signal is determined as the target control signal; If the first selection control signal is at a low level, and the delayed second selection control signal is at a high level, the delayed second selection control signal is determined as the target control signal; If the first selection control signal is at a low level, and the second selection control signal after delay is at a low level, the target control signal is at a low level.

[0035] Specifically, since the selection control signal is a timing signal, during the operation of the device, only one of the first selection control signal and the delayed second selection control signal should have a signal segment corresponding to the current driving chip at a high level.

[0036] In some embodiments, the method further includes: when the first number is greater than 0, generating fault information and storing it in a fault buffer; the fault information includes the first number and the serial number of the driver chip.

[0037] Specifically, for ease of understanding, Figure 1The driver chip C3 in FIG. 1 is used as an example to illustrate.

[0038] When driver chip C2 fails, the first number is 1 when driver chip C3 performs delay processing on sel1, and fault information is generated. The fault information includes the first number 1 and the serial number 3 of driver chip C3. When repairing the equipment, maintenance personnel can determine that the fault is the driver chip before driver chip C3, that is, driver chip C2, based on the fault information.

[0039] Based on the same inventive concept, an LED driver chip control device corresponding to the LED driver chip control method is also provided in the embodiment of the present disclosure. Since the principle of solving the problem by the device in the embodiment of the present disclosure is similar to the above-mentioned reaction ability detection method in the embodiment of the present disclosure, the implementation of the device can refer to the implementation of the method, and the repeated parts will not be repeated.

[0040] like Figure 4 As shown, Figure 4 An LED driver chip control device provided in an embodiment of the present disclosure is applied to an LED driver circuit based on a bus structure. The driver chip includes a first selection signal input terminal, a second selection signal input terminal, a data receiving terminal, a selection signal output terminal and a drive current output terminal. The device includes: The signal receiving module 301 is used to drive the chip to receive a first selection control signal and a second selection control signal; the first selection control signal is a signal received by the first selection signal input terminal; the second selection control signal is a signal received by the second selection signal input terminal; The signal selection module 302 is used to drive the chip to delay the second selection control signal by a first number of working cycles, and mix the first selection control signal with the delayed second selection control signal to obtain a target control signal; the first number is the difference between the sequence number of the signal source of the second selection control signal and the driver chip minus 1; The signal sending module 303 is used to drive the chip to output a third selection control signal after delay processing of the target control signal, and obtain the target control data from the data bus according to the target control signal; The driving module 304 is used to drive the chip to cache the target control data and generate a driving current signal according to the target control data.

[0041] In some embodiments, the signal selection module 302 is specifically used to determine the first selection control signal as the target control signal if the first selection control signal is high and the second selection control signal after delay is low; if the first selection control signal is low and the second selection control signal after delay is high, then determine the second selection control signal after delay as the target control signal; if the first selection control signal is low and the second selection control signal after delay is low, then the target control signal is low.

[0042] In some embodiments, a fault module is further included, which is used to generate fault information and store it in a fault buffer when the first number is greater than 0; the fault information includes the first number and the serial number of the driver chip.

[0043] For descriptions of the processing flow of each module in the device and the interaction flow between each module, reference may be made to the relevant descriptions in the above method embodiment, which will not be described in detail here.

[0044] Corresponds to Figure 1 The LED driver chip control method in the present disclosure also provides an electronic device 400, such as Figure 5 FIG. 4 is a schematic diagram of the structure of an electronic device 400 provided in an embodiment of the present disclosure, including: Processor 41, memory 42, and bus 43; memory 42 is used to store execution instructions, including memory 421 and external memory 422; memory 421 here is also called internal memory, which is used to temporarily store operation data in processor 41 and data exchanged with external memory 422 such as hard disk. Processor 41 exchanges data with external memory 422 through memory 421. When the electronic device 400 is running, the processor 41 communicates with the memory 42 through bus 43, so that the processor 41 executes Figure 1 The steps of the LED driver chip control method.

[0045] The embodiment of the present disclosure also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the LED driver chip control method described in the above method embodiment are executed. The storage medium can be a volatile or non-volatile computer-readable storage medium.

[0046] The embodiment of the present disclosure also provides a computer program product, which includes computer instructions. When the computer instructions are executed by a processor, the steps of the LED driver chip control method described in the above method embodiment can be executed. For details, please refer to the above method embodiment, which will not be repeated here.

[0047] The computer program product may be implemented in hardware, software or a combination thereof. In one optional embodiment, the computer program product is implemented as a computer storage medium. In another optional embodiment, the computer program product is implemented as a software product, such as a software development kit (SDK).

[0048] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, the specific working process of the system and device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here. In the several embodiments provided in the present disclosure, it should be understood that the disclosed system, device and method can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of the device or unit can be electrical, mechanical or other forms.

[0049] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0050] In addition, each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0051] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present disclosure, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present disclosure. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0052] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present disclosure, which are used to illustrate the technical solutions of the present disclosure, rather than to limit them. The protection scope of the present disclosure is not limited thereto. Although the present disclosure is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present disclosure, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure, and should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A method for controlling an LED driver chip, characterized in that: Applied to an LED driving circuit based on a bus structure, the driving chip includes a first selection signal input terminal, a second selection signal input terminal, a data receiving terminal, a selection signal output terminal and a driving current output terminal, and the method includes: The driving chip receives a first selection control signal and a second selection control signal; the first selection control signal is a signal received by the first selection signal input terminal; the second selection control signal is a signal received by the second selection signal input terminal; The driver chip delays the second selection control signal by a first number of working cycles, and mixes the first selection control signal with the delayed second selection control signal to obtain a target control signal; the first number is the difference between the sequence number of the signal source of the second selection control signal and the driver chip minus 1; The driver chip outputs a third selection control signal after delaying the target control signal, and obtains target control data from the data bus according to the target control signal; The driving chip caches the target control data and generates a driving current signal according to the target control data.

2. The method according to claim 1, characterized in that The driving chip comprises a delay operation module, a selection signal generation module, a delay output module, a data selection module, a latch module and an LED driving module.

3. The method according to claim 2, characterized in that The first selection signal input terminal is connected to the selection signal generating module, the second selection signal input terminal is connected to the delay operation module, the data receiving terminal is connected to the data selection module, the selection signal output terminal is connected to the delay output module, and the driving current output terminal is connected to the LED driving module.

4. The method according to claim 1, characterized in that The mixing of the first selection control signal and the delayed second selection control signal to obtain a target control signal includes: If the first selection control signal is at a high level, and the delayed second selection control signal is at a low level, determining the first selection control signal as a target control signal; If the first selection control signal is at a low level, and the delayed second selection control signal is at a high level, determining the delayed second selection control signal as a target control signal; If the first selection control signal is at a low level, and the delayed second selection control signal is at a low level, the target control signal is at a low level.

5. The method according to claim 1, characterized in that Also includes: When the first number is greater than 0, fault information is generated and stored in a fault buffer; The fault information includes the first quantity and the serial number of the driver chip.

6. A LED driver chip control device, characterized in that: Applied to an LED driving circuit based on a bus structure, the driving chip includes a first selection signal input terminal, a second selection signal input terminal, a data receiving terminal, a selection signal output terminal and a driving current output terminal, and the device includes: A signal receiving module, used for driving the chip to receive a first selection control signal and a second selection control signal; the first selection control signal is a signal received by the first selection signal input terminal; the second selection control signal is a signal received by the second selection signal input terminal; A signal selection module, configured to drive the chip to delay the second selection control signal by a first number of working cycles, and mix the first selection control signal with the delayed second selection control signal to obtain a target control signal; the first number is the difference between the sequence number of the signal source of the second selection control signal and the sequence number of the driver chip minus 1; A signal sending module, used for driving the chip to output a third selection control signal after delay processing of the target control signal, and to obtain target control data from a data bus according to the target control signal; The driving module is used to drive the chip to cache the target control data and generate a driving current signal according to the target control data.

7. The device according to claim 6, characterized in that The signal selection module is specifically used to determine the first selection control signal as the target control signal if the first selection control signal is at a high level and the second selection control signal after the delay is at a low level; if the first selection control signal is at a low level and the second selection control signal after the delay is at a high level, determine the second selection control signal after the delay as the target control signal; if the first selection control signal is at a low level and the second selection control signal after the delay is at a low level, the target control signal is at a low level.

8. The device according to claim 6, characterized in that It also includes a fault module, which is used to generate fault information and store it in a fault buffer when the first number is greater than 0; the fault information includes the first number and the serial number of the driver chip.

9. An electronic device, characterized in that: include: A processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the memory communicate via the bus, and when the machine-readable instructions are executed by the processor, the steps of the LED driver chip control method according to any one of claims 1 to 5 are performed.

10. A computer-readable storage medium, characterized in that: The computer readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the LED driver chip control method according to any one of claims 1 to 5 are executed.

Images