Double-input double-output breakpoint resume LED driving method, circuit and device

Abstract

The invention provides a double-input double-output breakpoint resume LED driving method, which is applied to an LED driving chip and system, and comprises the following steps: respectively receiving first input data and second input data; performing first shift register processing on the first input data to obtain first register data, and outputting the first input data as first output data; the first shift register processing is shift register data front end x bit data, and x is a data bit number required by a single-stage driving chip; performing second shift register processing on the second input data to obtain second register data; the second shift register processing is data from the (x + 1) th bit to the 2xth bit at the front end of the shift register data; comparing the first register data with the second register data, taking front x bit non-zero data to obtain driving data, and inputting the front end x bit data of the driving data into an LED driving circuit to drive an LED to be lightened; and latching the data from which the x-bit driving data is removed, and outputting the data as second output data.

Description

Technical Field

[0001] The present disclosure relates to the technical field of LED control, and in particular to a dual-input and dual-output breakpoint-resume LED driving method, circuit and device. Background Art

[0002] In the field of LED display technology, the step-by-step series driving method is a common driving scheme. In the prior art, N-level driver chips are usually connected in series, and the driving data is transmitted from the previous driver chip to the next driver chip. Each driver chip only extracts the driving data required by this level to drive the LED connected to it and achieve the corresponding display effect, and transmits the remaining data to the next driver chip.

[0003] Although this series drive method simplifies the system design to a certain extent, it also has obvious defects. When a driver chip at a certain level in the series system is damaged, the damaged chip cannot transmit data normally, causing all subsequent driver chips to be unable to receive data, and then unable to drive the LEDs connected to them for display. This failure will seriously affect the display effect of the entire system, and even cause large-area display failure, reducing the reliability and stability of the system. Summary of the invention

[0004] The disclosed embodiments at least provide a dual-input and dual-output breakpoint-resume LED driving method, which can improve the stability and reliability of the system.

[0005] The embodiment of the present disclosure provides a dual-input and dual-output breakpoint-resume LED driving method, which is applied to an LED driving chip and system, including: Receiving first input data and second input data respectively; Performing a first shift register process on the first input data to obtain first registered data, and outputting the first input data as first output data; the first shift register process is x bits of the front end of the shift register data, where x is the number of data bits required by the single-stage driver chip; Performing a second shift registration process on the second input data to obtain second registered data; the second shift registration process is to shift the data from the front x+1 bit to the 2x bit of the registered data; The first registered data is compared with the second registered data, the first x bits of non-zero data are taken to obtain driving data, and the front x bits of driving data are input to the LED driving circuit to drive the LED to light up.

[0006] The data after removing the x bits of driving data required by this stage is latched and output as the second output data; In some embodiments, the driving data is latched and then output as the second output data, including: The front x bits of the driving data are intercepted, and the remaining driving data are output as the second output data.

[0007] In some embodiments, the first output terminal is connected to the first input terminal of the next-stage LED driver chip, and the second output terminal is connected to the second input terminal of the next-stage LED driver chip.

[0008] In some embodiments, the LED driver chip includes a first input terminal, a second input terminal, a first shift register, a data comparator, a data latch, a data backup device, a data selector, an LED driver terminal, a first output terminal, and a second output terminal; the first input data is input by the first input terminal, the second input data is input by the second input terminal, the first output data is output by the second output terminal, and the second output data is output by the first output terminal.

[0009] In some embodiments, the first input terminal is connected to the data backup device and the first shift register; the data backup device is connected to the second output terminal; the second input terminal is connected to the second shift register; the first shift register and the second shift register are connected to the data comparator; the data comparator is connected to the data latch; the data latch is connected to the data selector and the first output terminal; the data selector is connected to the LED driving terminal.

[0010] In some embodiments, the first input terminal is connected to the second output terminal through a safety line; the safety line includes a buried layer line and other reliable connection methods.

[0011] In some embodiments, when the LED driver chip is the first driver chip of the driver chip circuit, the second input terminal is grounded.

[0012] The disclosed embodiment also provides a dual-input and dual-output breakpoint-resume LED driving circuit, the driving circuit comprising at least two LED driving chips, the LED driving chip comprising a first input terminal, a second input terminal, a first output terminal, and a second output terminal; the first input terminal of the LED driving chip is connected to the second output terminal through a safety circuit; the first output terminal of each LED driving chip is connected to the first input terminal of the next level, and the second output terminal of each LED driving chip is connected to the second input terminal of the next level.

[0013] The embodiment of the present disclosure also provides a dual-input and dual-output breakpoint-resume LED driver device, which is applied to an LED driver chip and system, including: A data receiving module, used for receiving first input data and second input data respectively; A first data processing module is used to perform a first shift register process on the first input data to obtain first registered data, and output the first input data as first output data; the first shift register process is x bits of the front end of the shift register data, where x is the number of data bits required by the single-stage driver chip; A second data processing module is used to perform a second shift registration process on the second input data to obtain second registered data; the second shift registration process is to shift the data from the front end x+1 bit to the 2x bit of the registered data; The data comparison module is used to compare the first stored data with the second stored data, take the first x bits of non-zero data to obtain the driving data, and input the front x bits of the driving data to the LED driving circuit to drive the LED to light up.

[0014] The latch module is used to remove the x bits of driving data required by the current stage, latch the data, and then output it as the second output data.

[0015] In some embodiments, the data comparison module includes: The data interception unit is used to intercept the front x bits of the driving data and output the remaining driving data as the second output data.

[0016] The disclosed embodiment provides a dual-input and dual-output breakpoint-resume LED driving method. When a driver chip at a certain level fails, the node can be skipped and data can be transmitted to the driver chip that works normally afterwards, thus avoiding overall display failure caused by single-point failure and significantly improving the stability and reliability of the system.

[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 flow chart of a dual-input and dual-output breakpoint-resume LED driving method provided by an embodiment of the present disclosure is shown; Figure 2A schematic diagram of a dual-input and dual-output LED driver chip provided by an embodiment of the present disclosure is shown; Figure 3 A schematic diagram of a dual-input and dual-output breakpoint-resume LED driving circuit provided by an embodiment of the present disclosure is shown; Figure 4 A schematic diagram showing input and output data of a dual-input and dual-output breakpoint-resume transmission LED driving circuit provided by an embodiment of the present disclosure is shown; Figure 5 A schematic diagram of a dual-input and dual-output breakpoint-resume LED driving 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] Based on research, the present invention provides a dual-input dual-output breakpoint resume LED driving method, device, electronic device and storage medium. By using a dual-input dual-output line structure, the first input data is directly output to the next-level driver chip as backup data, and the LED driving data is determined by data comparison in the driver chip. When a certain level of driver chip fails, the node can be skipped and the data can be transmitted to the subsequent normal driver chip, avoiding the overall display failure caused by a single point failure, and significantly improving the stability and reliability of the system.

[0024] To facilitate understanding of the present embodiment, a dual-input dual-output breakpoint resume LED driving method disclosed in the embodiment of the present disclosure is first introduced in detail. The execution subject of the dual-input dual-output breakpoint resume LED driving 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 dual-input dual-output breakpoint resume LED driving method can be implemented by a processor calling a computer-readable instruction stored in a memory.

[0025] like Figure 1 As shown, Figure 1 A flowchart of a dual-input and dual-output breakpoint-resume LED driving method provided by an embodiment of the present disclosure, the method comprising: S101, receiving first input data and second input data respectively; Specifically, the driver chip receives first input data and second input data from a previous driver chip respectively, wherein the first input data is a main data channel and the second input data is a standby data channel.

[0026] S102, performing a first shift register process on the first input data to obtain first registered data, and outputting the first input data as first output data; the first shift register process is x bits of the front end of the shift register data, where x is the number of data bits required by the single-stage driver chip; Specifically, the first x bits of the first input data are shifted and registered to obtain the first registered data. Meanwhile, the first input data is directly output as the first output data and transmitted to the next-level driver chip.

[0027] S103, performing a second shift registration process on the second input data to obtain second registered data; the second shift registration process is to shift register data from the front end x+1 bit to the 2x bit of the data; Specifically, the data from the first x+1 bit to the 2x bit of the second input data is shifted and registered to obtain the second registered data. The purpose of this step is to extract data related to the current driver chip from the spare data channel.

[0028] S104, compare the first stored data with the second stored data, take the first x bits of non-zero data to obtain driving data, and latch the driving data and output it as second output data; Specifically, the first registered data and the second registered data are compared. If the first registered data is valid, it is used as the driving data; if the first registered data is invalid (for example, data is lost due to a fault in the previous chip), the second registered data is selected as the driving data. The driving data is latched to ensure data stability, and is output as the second output data and transmitted to the next-level driving chip.

[0029] S105, inputting the front-end x bit data of the driving data into the LED driving circuit to drive the LED to light up.

[0030] Specifically, the first x bits of the driving data are input into the LED driving circuit to drive the LED connected to the current stage to light up, thereby achieving a corresponding display effect.

[0031] Through the above steps, the dual-input dual-output breakpoint resume LED driving method of the present invention can effectively solve the system failure problem caused by single point failure in the prior art, and significantly improve the reliability and fault tolerance of the LED display system.

[0032] In some embodiments, the driving data in S104 is latched and then output as the second output data, including: The front x bits of the driving data are intercepted, and the remaining driving data are output as the second output data.

[0033] Specifically, the front x bit data of the driving data is the driving data segment used by the current level driving chip, the second output data is used as the first input data of the next level driving chip, and the used driving data segment is removed to improve the driving efficiency of the subsequent driving chip.

[0034] In some embodiments, the first output terminal is connected to the first input terminal of the next-stage LED driver chip, and the second output terminal is connected to the second input terminal of the next-stage LED driver chip.

[0035] In some embodiments, Figure 2 As shown, Figure 2 An LED driver chip provided for an embodiment of the present disclosure includes a first input terminal, a second input terminal, a first shift register, a data comparator, a data latch, a data backup device, a data selector, an LED driver terminal, a first output terminal and a second output terminal; the first input data is input by the first input terminal, the second input data is input by the second input terminal, the first output data is output by the second output terminal, and the second output data is output by the first output terminal.

[0036] The first input end is connected to the data backup device and the first shift register; the data backup device is connected to the second output end; the second input end is connected to the second shift register; the first shift register and the second shift register are connected to the data comparator; the data comparator is connected to the data latch; the data latch is connected to the data selector and the first output end; the data selector is connected to the LED driving end.

[0037] In some embodiments, the first input terminal is connected to the second output terminal through a safety line; the safety line includes a buried layer line and other reliable connection methods.

[0038] Specifically, during the chip design phase, a safety circuit is planned and designed, which directly connects the first input terminal to the second output terminal. The safety circuit can be implemented using buried circuit technology. The buried circuit is located between multiple layers of metal wiring inside the chip and is isolated from other signal circuits by an insulating layer to avoid signal interference.

[0039] The first input terminal directly transmits the signal to the second output terminal through the safety line, forming an independent signal channel. This channel serves as a redundant backup for the main signal channel. When the main signal channel is interrupted due to a fault, the safety line can ensure that the signal continues to be transmitted to avoid system failure.

[0040] In some embodiments, when the LED driver chip is the first driver chip of the driver chip circuit, the second input terminal is grounded.

[0041] like Figure 3 As shown, Figure 3 Schematic diagram of a dual-input and dual-output breakpoint-resume LED driving circuit provided by an embodiment of the present disclosure. Figure 3 As shown in, the driving circuit provided by the embodiment of the present disclosure includes at least two LED driver chips, and the LED driver chip includes a first input terminal, a second input terminal, a first output terminal, and a second output terminal; the first input terminal of the LED driver chip is connected to the second output terminal through a safety circuit; the first output terminal of each LED driver chip is connected to the first input terminal of the next level, and the second output terminal of each LED driver chip is connected to the second input terminal of the next level.

[0042] Specifically, the driving circuit is composed of a plurality of identical dual-input dual-output driving chips cascaded, and each stage of the driving chip is composed of two data input ports, a first input terminal DI1 and a second input terminal DI2, and two data output ports, a first output terminal DO1 and a second output terminal DO2; Each level of driver chip receives data from the first input terminal DI1 and the second input terminal DI2 at the same time; Each level of driver chip outputs data through the first output terminal DO1 and the second output terminal DO2 at the same time; The data of the first input terminal DI1 of each level driver chip is transmitted to the second output terminal DO2 via the safety backup circuit for use by the next level driver chip; Each level of driver chip compares the data at the first input terminal DI1 and the second input terminal DI2, extracts the first x bits of data, transmits it to the driver chip at this level and converts it into a current signal to light up the LED at this level; The second input terminal DI2 of the first-stage driver chip is grounded, and the driving data can be input only through the first input terminal DI1. When the driver chips at all levels in the circuit are working normally, the input and output data of each chip are as follows: Figure 4 As shown, Figure 4 A schematic diagram of a dual-input and dual-output breakpoint-resume transmission LED drive circuit input and output data provided by an embodiment of the present disclosure.

[0043] In the case of a chip at a certain level being damaged, the safety circuit can still ensure that the backup data is transmitted from the first input terminal DI1 to the second output terminal DO2; when the LED at this level cannot be lit, the second output terminal DO2 still has output, ensuring that the second input terminal DI2 of the next level driver chip has input data, and can still ensure normal data transmission, and the LED can still light up normally. Figure 3 Take the C2 damage in as an example: The driver chip C1 in the series circuit works normally, and data transmission is as before; The driver chip C2 in the series circuit does not work properly, the output signal C2DO1 of the driver chip C2 is zero, and there is no data transmission; The output signal C2DO2 of the driver chip C2 is connected to C2DI through a buried layer circuit or other safety circuit, and does not pass through the internal processing circuit of the chip, so C2DO2=C2DI1; Since the driver chip C2DO1 has no output, C3DI1 has no input signal; Driver chip C3, input signal C3DI2= C2DO2=C2DI1; Inside the driver chip C3, the input signal of C3DI2 is sent to the comparator through the shift register to take x+1 to 2x bits, compared with C3DI1, and the shift register x+1 to 2x bits, a total of x bits of data, are taken and sent to the LED driver circuit at this level to light up the LED.

[0044] Based on the same inventive concept, the embodiment of the present disclosure also provides a dual-input dual-output breakpoint resume LED driving device corresponding to the dual-input dual-output breakpoint resume LED driving method. Since the principle of solving the problem by the device in the embodiment of the present disclosure is similar to the above-mentioned dual-input dual-output breakpoint resume LED driving 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.

[0045] like Figure 5 As shown, Figure 5 Schematic diagram of a dual-input and dual-output breakpoint-resume LED driver provided by an embodiment of the present disclosure. Figure 5 As shown in the figure, the dual-input and dual-output breakpoint-resume LED driving device 300 provided in the embodiment of the present disclosure includes: A data receiving module 301 is used to receive first input data and second input data respectively; The first data processing module 302 is used to perform a first shift register process on the first input data to obtain first registered data, and output the first input data as first output data; the first shift register process is x bits of the front end of the shift register data, where x is the number of data bits required by the single-stage driver chip; The second data processing module 303 is used to perform a second shift register process on the second input data to obtain second registered data; the second shift register process is to shift register data from the front end x+1 bit to the 2x bit of the data; The data comparison module 304 is used to compare the first registered data with the second registered data, obtain the first x bits of non-zero data to obtain driving data, and input the front x bits of the driving data to the LED driving circuit to drive the LED to light up.

[0046] The latch module 305 is used for latching the data after removing the x bits of driving data required for the current stage and outputting the data as the second output data.

[0047] In some embodiments, the data comparison module 304 includes: The data interception unit is used to intercept the front x bits of the driving data and output the remaining driving data as the second output data.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[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 dual-input and dual-output breakpoint resume LED driving method, applied to LED driver chip and system, characterized in that: The method comprises: Receiving first input data and second input data respectively; Performing a first shift register process on the first input data to obtain first registered data, and outputting the first input data as first output data; the first shift register process is x bits of front end data of the shift register data, where x is the number of data bits required by a single-stage driver chip; Performing a second shift registration process on the second input data to obtain second registered data; the second shift registration process is to shift and register data from the front end x+1 bit to the 2x bit of the data; Compare the first stored data with the second stored data, take the first x bits of non-zero data to obtain driving data, and input the front x bits of the driving data to the LED driving circuit to drive the LED to light up; The data after the x bit driving data is removed is latched and output as the second output data.

2. The method according to claim 1, characterized in that The data after the x bit driving data is removed is latched and output as the second output data, comprising: The front x bits of the driving data are intercepted, and the remaining driving data is output as the second output data.

3. The method according to claim 1, characterized in that The LED driver chip includes a first input terminal, a second input terminal, a first shift register, a data comparator, a data latch, a data backup device, a data selector, an LED driver terminal, a first output terminal, and a second output terminal; the first input data is input by the first input terminal, the second input data is input by the second input terminal, the first output data is output by the second output terminal, and the second output data is output by the first output terminal.

4. The method according to claim 3, characterized in that The first input end is connected to a data backup device and a first shift register; the data backup device is connected to a second output end; the second input end is connected to a second shift register; the first shift register and the second shift register are connected to a data comparator; the data comparator is connected to a data latch; the data latch is connected to a data selector and a first output end; the data selector is connected to an LED driving end.

5. The method according to claim 3, characterized in that The first output end is connected to the first input end of the next-stage LED driver chip, and the second output end is connected to the second input end of the next-stage LED driver chip.

6. The method according to claim 3, characterized in that The first input terminal is connected to the second output terminal through a safety circuit; the safety circuit includes a buried circuit and other reliable connection methods.

7. The method according to claim 3, characterized in that When the LED driver chip is a first-stage driver chip of a driver chip circuit, the second input terminal is grounded.

8. A dual-input and dual-output breakpoint-resume LED driving circuit, characterized in that: The driving circuit includes at least two LED driving chips, and the LED driving chip includes a first input terminal, a second input terminal, a first output terminal, and a second output terminal; the first input terminal of the LED driving chip is connected to the second output terminal through a safety circuit; the first output terminal of each LED driving chip is connected to the first input terminal of the next level, and the second output terminal of each LED driving chip is connected to the second input terminal of the next level.

9. A dual-input and dual-output breakpoint resume LED driver device, applied to LED driver chip and system, characterized in that: The device comprises: A data receiving module, used for receiving first input data and second input data respectively; A first data processing module is used to perform a first shift register process on the first input data to obtain first registered data, and output the first input data as first output data; the first shift register process is x bits of the front end of the shift register data, where x is the number of data bits required by the single-stage driver chip; A second data processing module, used for performing a second shift registration process on the second input data to obtain second registered data; the second shift registration process is to shift the data from the front end x+1 bit to the 2x bit of the registered data; A data comparison module, used for comparing the first stored data with the second stored data, taking the first x bits of non-zero data to obtain driving data, and inputting the front x bits of the driving data into the LED driving circuit to drive the LED to light up; The latch module is used to remove the x bits of driving data required by the current stage, latch the data, and then output it as the second output data.

10. The device according to claim 9, characterized in that The data comparison module comprises: The data interception unit is used to intercept the front x bits of the driving data and output the remaining driving data as the second output data.

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