WO2023060845A1 - Led驱动电路及驱动方法、led显示系统 - Google Patents

Led驱动电路及驱动方法、led显示系统 Download PDF

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Publication number
WO2023060845A1
WO2023060845A1 PCT/CN2022/083002 CN2022083002W WO2023060845A1 WO 2023060845 A1 WO2023060845 A1 WO 2023060845A1 CN 2022083002 W CN2022083002 W CN 2022083002W WO 2023060845 A1 WO2023060845 A1 WO 2023060845A1
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WIPO (PCT)
Prior art keywords
driving circuit
led
led driving
signal
data
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PCT/CN2022/083002
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English (en)
French (fr)
Inventor
陈日仪
鲍宏
王亮
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杭州视芯科技股份有限公司
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Publication of WO2023060845A1 publication Critical patent/WO2023060845A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]

Definitions

  • the invention relates to the technical field of LED display, in particular to an LED driving circuit, a driving method, and an LED display system.
  • LED light strings and LED exterior wall display screens manufactured by LED light strings according to predetermined rules are used to display various patterns and text information.
  • This kind of LED light string and the LED display system combined with the LED light string include a control terminal and an LED display.
  • the LED display screen includes a plurality of LED light string units, and each LED light string unit corresponds to a display area of the LED display screen.
  • the LED light string unit can be used individually, or a plurality of LED light string units can be cascaded in sequence to form a group to expand the display area of the display screen.
  • Each LED light string unit generally consists of an LED driving circuit and several LED lights.
  • the driving circuit of each LED light string unit not only undertakes the task of driving the LED, but also takes on the task of reconstructing the control signal transmitted from the driving circuit of the previous LED light string unit, so that the serial communication
  • the control information is forwarded to the next drive circuit one by one from one end of the light string until the drive circuit of the last LED light string unit.
  • the object of the present invention is to provide an LED driving circuit and driving method, and an LED display system, which can still ensure that the LED strings driven by the subsequent stage can still be driven normally when the continuous driving circuit fails.
  • an LED driving circuit comprising a main input terminal, at least one spare input terminal and an output terminal; the LED driving circuit receives a configuration signal and a data signal from an upper-level LED driving circuit via the main input terminal, Or receive configuration signals and data signals from any preceding LED driving circuit via a spare input terminal, and at least one LED driving circuit is separated between the preceding LED driving circuit and the current LED driving circuit; The terminal forwards the configuration signal and data signal of the cascaded LED driving circuit after the LED driving circuit of the current level to the LED driving circuit of the next level and/or the LED driving circuit of the subsequent stage connected thereto, and the LED driving circuit of the latter stage is connected with the LED driving circuit of the present stage. There is at least one LED driving circuit between each stage of LED driving circuits.
  • the configuration signal includes a configuration command and a bridging parameter
  • the bridging parameter is the number of LED driving circuits separated between the current LED driving circuit and the previous LED driving circuit
  • the data signal includes a plurality of display data
  • the first jump parameter in the configuration signal is used as the jump parameter of the current LED drive circuit;
  • the bridging parameter of the LED driving circuit of the stage uses the k+1th data signal among the data signals as the display data of the LED driving circuit of the current stage, wherein k is the bridging parameter of the LED driving circuit of the current stage.
  • the LED drive circuit when it receives the configuration signal and the data signal from the standby input terminal, it forwards the display data after the k+1th data signal in the data signal as a new data signal to The next-level LED driver circuit and/or the subsequent-stage LED driver circuit bridged therewith; and forwarding the configuration command in the configuration signal and the bridged parameter after the first bridged parameter as a new configuration signal to the next The first-stage LED drive circuit and/or the subsequent-stage LED drive circuit connected across it.
  • the LED driving circuit when the LED driving circuit receives the configuration signal and the data signal from the main input terminal, the LED driving circuit uses the first display data in the data signal as the display of the LED driving circuit at the current stage data.
  • the LED driving circuit when the LED driving circuit receives the configuration signal and the data signal from the main input terminal, the LED driving circuit forwards the display data following the first display data in the data signal as a new data signal to the next-level LED driving circuit and/or the subsequent LED driving circuit connected thereto; and forward the configuration command in the configuration signal and the bridging parameter after the first bridging parameter as a new configuration signal to the next The first-stage LED drive circuit and/or the subsequent-stage LED drive circuit connected across it.
  • the main input terminal of the first-stage LED driving circuit is connected to the control terminal.
  • the main input terminal of any LED driving circuit after the first-level LED driving circuit is connected to the upper-level LED driving circuit; the spare input terminal is suspended or connected across the output terminal of any previous-level LED driving circuit;
  • the output terminal is connected to the main input terminal of the next-stage LED driving circuit, and is bridge-connected to the spare input terminal of any subsequent-stage LED driving circuit.
  • the LED driving circuit includes an input detection module, a data processing module, a video memory module and a driving module, wherein the input detection module is configured to, when detecting that the configuration signal and the data signal are received from the main input terminal, send The configuration signal and the data signal are sent to the data processing module; the data processing module is used to use the first display data in the data signal as the display data of the LED drive circuit at this level; the display memory module uses The display data of the LED driving circuit at the current stage is buffered; the driving module is used to generate a driving signal according to the display data of the LED driving circuit at the current stage, and the driving signal is used to drive the LED light string.
  • the input detection module is configured to, when detecting that the configuration signal and the data signal are received from the main input terminal, send The configuration signal and the data signal are sent to the data processing module; the data processing module is used to use the first display data in the data signal as the display data of the LED drive circuit at this level; the display memory module uses The display data of the LED driving circuit at the current stage is
  • the LED drive circuit further includes a jumper processing module, and the input detection module is also configured to convert the configuration signal and the data signal to the The data signal is sent to the data processing module and the crossover processing module; the crossover processing module is used to use the first crossover parameter in the configuration signal as the crossover parameter of the current LED drive circuit; the data processing module also It is used for using the k+1th data signal among the data signals as the display data of the LED driving circuit of the current stage according to the jumper parameters of the LED driving circuit of the current stage.
  • the input detection module is also configured to convert the configuration signal and the data signal to the The data signal is sent to the data processing module and the crossover processing module; the crossover processing module is used to use the first crossover parameter in the configuration signal as the crossover parameter of the current LED drive circuit; the data processing module also It is used for using the k+1th data signal among the data signals as the display data of the LED driving circuit of the current stage according to the jumper parameters of the LED driving circuit of the current stage.
  • the LED drive circuit further includes: a data forwarding module, configured to forward the configuration signals and data signals of the LED drive circuits cascaded after the current level of the LED drive circuit to the next level of the LED drive circuit and/or bridge it The latter stage LED drive circuit.
  • a data forwarding module configured to forward the configuration signals and data signals of the LED drive circuits cascaded after the current level of the LED drive circuit to the next level of the LED drive circuit and/or bridge it The latter stage LED drive circuit.
  • the data forwarding module uses the display data after the k+1th data signal in the data signal as a new The data signal is forwarded to the next-level LED driving circuit and/or the subsequent LED driving circuit connected thereto; and the configuration instruction in the configuration signal and the bridging parameter after the first bridging parameter are used as a new configuration The signal is forwarded to the next-stage LED drive circuit and/or the subsequent-stage LED drive circuit connected thereto.
  • the data forwarding module uses the display data following the first display data in the data signal as new data
  • the signal is forwarded to the next-level LED driver circuit and/or the subsequent-level LED driver circuit bridged therewith; and the configuration command in the configuration signal and the bridged parameter after the first bridged parameter are forwarded as a new configuration signal to the next-stage LED drive circuit and/or the subsequent-stage LED drive circuit connected thereto.
  • an LED display system comprising a control terminal and a plurality of cascaded LED light string units, each LED light string unit including the above-mentioned LED drive circuit and LED light string, including : the control terminal sends a configuration signal and a data signal to the LED light string unit, wherein the configuration signal includes configuration instructions and bridging parameters, and the data signal includes a plurality of display data; the plurality of cascaded When the LED driving circuit in the LED light string unit receives the configuration signal and the data signal from the spare input terminal, according to the crossover parameter in the configuration signal, the k+1th data signal in the data signal is used as The display data of the LED driving circuit of the current stage, wherein, k is the jumper parameter of the LED driving circuit of the present stage.
  • the LED drive circuit in the plurality of cascaded LED light string units receives the configuration signal and the data signal from the main input terminal, it uses the first display data in the data signal as the LED of the current stage.
  • the display data of the drive circuit is not limited to
  • the LED driving circuit includes a main input terminal, at least one spare input terminal and an output terminal, and it is characterized in that it includes: detecting that the LED driving circuit is from The main input terminal also receives configuration signals and data signals from the standby input terminal, wherein the configuration signal includes configuration instructions and cross-connection parameters, and the cross-connection parameters are the distance between the current-stage LED drive circuit and the previous-stage LED drive circuit.
  • the data signal includes a plurality of display data; when it is detected that the configuration signal and data signal are received from the standby input terminal, the first cross-connect parameter in the configuration signal is used as the cross-connect parameter of the current-level LED drive circuit connection parameters; according to the bridging parameters of the current-level LED driving circuit, the k+1th data signal in the data signal is used as the display data of the current-level LED driving circuit, wherein k is the bridging parameter of the current-level LED driving circuit .
  • the driving method further includes: forwarding the display data after the k+1th data signal in the data signal as a new data signal to the next-level LED driving circuit and/or the subsequent LED driving circuit connected thereto stage LED drive circuit; and forward the configuration instruction in the configuration signal and the bridging parameter after the first bridging parameter as a new configuration signal to the next-level LED driving circuit and/or the rear-stage LED bridging it Drive circuit.
  • the driving method further includes: when it is detected that the configuration signal and the data signal are received from the main input terminal, using the first display data in the data signal as the display data of the LED driving circuit at the current stage.
  • the driving method further includes: forwarding the display data after the first display data in the data signal as a new data signal to the next-level LED driving circuit and/or the subsequent-level LEDs connected thereto drive circuit; and forward the configuration instruction in the configuration signal and the bridging parameter after the first bridging parameter as a new configuration signal to the next-level LED driving circuit and/or the subsequent LED driving circuit bridging it .
  • the first jump parameter in the configuration signal is used as the current-level LED
  • the bridging parameters of the driving circuit according to the bridging parameters of the LED driving circuit of the current level, the k+1th data signal in the data signal is used as the display data of the LED driving circuit of the current level, wherein k is the LED driving circuit of the current level
  • the jumper parameters can be used to achieve continuous damage to multiple circuits without affecting the normal operation of subsequent circuits.
  • Fig. 1 shows the schematic diagram of LED display system in the prior art
  • FIG. 2 shows a schematic diagram of another LED display system in the prior art
  • FIG. 3 shows a schematic structural diagram of an LED display system according to an embodiment of the present invention
  • Fig. 4 shows a schematic diagram of a driving data processing method involved in driving control of LED light strings according to an embodiment of the present invention
  • Fig. 5 shows a schematic diagram of another driving data processing method involved in the driving control of LED light strings according to an embodiment of the present invention
  • FIG. 6 shows a schematic structural diagram of an LED driving circuit according to an embodiment of the present invention.
  • Fig. 7 shows a flowchart of a driving method of an LED driving circuit according to an embodiment of the present invention.
  • Fig. 1 shows a schematic block diagram of an LED display system in the prior art.
  • the LED display system includes a control terminal 100 and an LED display screen 200 , and the control terminal 100 is connected to the LED display screen 200 .
  • the LED display screen 200 includes a plurality of cascaded LED light string units (C1-Cn). Each LED light string unit includes at least one LED driving circuit and an LED light string. Multiple LED driving circuits of multiple cascaded LED lamp string units are connected in series.
  • the control terminal 100 provides data signals to the LED display screen 200, wherein the data signals include display data of multiple cascaded LED light string units.
  • the LED driving circuit in each LED light string unit has only one input terminal Din and one output terminal Do, and the output terminal Do of the LED driving circuit of each stage sends a data signal to the input terminal Din of the next-stage LED driving circuit.
  • the output terminal Do of the drive circuit cannot send data signals to the next-level LED drive circuit, resulting in the failure of the LED lights controlled by the LED drive circuit and the subsequent LED drive circuit. It is normally lit and affects the image display.
  • Fig. 2 shows a schematic diagram of another LED display system in the prior art.
  • the LED driving circuit in each LED light string unit includes a main input terminal Din0, a backup input terminal Din1 and an output terminal Do.
  • the main input terminal Din0 is connected to the output terminal Do of the previous stage LED driving circuit;
  • the standby input terminal Din1 is connected to the output terminal of the preceding stage LED driving circuit, and the preceding stage LED driving circuit is separated from the current stage driving circuit.
  • An LED driver circuit is provided.
  • the LED display system can effectively avoid the failure of the entire string of LED lamps when a single LED drive circuit in the LED lamp string fails.
  • LED light strings especially the display screens composed of LED light strings, are prone to damage to multiple LED drive circuits in a row. . In this case, once a plurality of consecutive LED driving circuits are damaged in the LED display system, all subsequent series-connected LED lamps will still fail, affecting the display.
  • Fig. 3 shows a schematic diagram of an LED display system provided according to an embodiment of the present invention.
  • the LED driving circuit in each LED light string unit includes a main input terminal Din0 , a backup input terminal Din1 and an output terminal Do.
  • the main input terminal of the LED driving circuit is connected with the upper LED driving circuit.
  • the LED driving circuit when the LED driving circuit is a first-stage LED driving circuit, its main input terminal Din0 is connected to the control terminal 100 .
  • the LED driving circuit is a subsequent level LED driving circuit, its main input terminal Din0 is connected to the output terminal Do of the upper level LED driving circuit.
  • the spare input terminal Din1 of each stage of LED driving circuit is connected to the previous stage of LED driving circuit, and at least one LED driving circuit is separated between the previous stage of LED driving circuit and the current stage of LED driving circuit.
  • the output terminal Do of each stage of the driving circuit is connected to the main input terminal of the next stage of the LED driving circuit, and is bridged to the spare input terminal of any subsequent stage of the LED driving circuit.
  • each level of LED driving circuit has only one spare input terminal Din1
  • the output terminal Do of each level of LED driving circuit only provides one standby signal, which is consistent with the standby input terminal of one of the LED driving circuits after the LED driving circuit Din1 connection.
  • the standby input terminal Din1 of the LED driving circuit is suspended or connected to any output terminal of the previous-stage LED driving circuit.
  • each level of LED driving circuit includes m spare input terminals (Din1, Din2, ... Dinm)
  • the output terminal Do of each level of LED driving circuit can provide q spare signals, wherein m is an integer greater than 1, q is a positive integer, q ⁇ m, and the q spare signals are respectively connected to any one of the m spare input terminals (Din1, Din2, . . . ) of the subsequent q LED drive circuits.
  • connection manner of the LED driving circuit shown in FIG. 3 is only an example, and is not limited thereto.
  • the output of the control terminal 100 is connected to the spare input terminal Din1 of the second-stage LED drive circuit Dc2; the output terminal of the first-stage LED drive circuit Dc1 is connected to the spare input terminal Din1 of the fourth-stage LED drive circuit Dc4; the third-stage The standby input terminal Din1 of the LED driving circuit Dc3 is suspended.
  • the LED driving circuit receives the configuration signal and data signal from the upper LED driving circuit through the main input terminal Din0, or receives the configuration signal and data signal from any previous LED driving circuit through the spare input terminal Din1.
  • the configuration signal includes a configuration instruction Ins and a crossover parameter (k1+k2+...+ki+%), and the crossover parameter is the current-level LED drive circuit and the previous-stage LED driver with crossover.
  • the data signal includes a plurality of display data (D0+D1+D2+...+Dn-1+).
  • the first jump parameter in the configuration signal is used as the jump parameter of the LED drive circuit of the current stage; according to the LED of the current stage
  • the bridging parameter of the driving circuit uses the k+1th data signal among the data signals as the display data of the LED driving circuit of the current stage, where k is the bridging parameter of the LED driving circuit of the current stage.
  • the LED driving circuit forwards the configuration instruction in the configuration signal and the bridging parameters after the first bridging parameter as a new configuration signal to the next-level LED driving circuit and/or the subsequent LED driver bridging with it. circuit.
  • the first-stage LED drive circuit Dc1 fails, the main input terminal Din0 of the second-stage LED drive circuit Dc2 cannot receive configuration signals and data signals from the first-stage LED drive circuit Dc1, and its backup input terminal Din1 receives from the control terminal 100
  • the second data signal D1 among the data signals is used as the display data of the second-stage LED driving circuit Dc2.
  • the second-level LED driving circuit Dc2 removes the first crossover parameter k1 in the configuration signal and forwards it as a new configuration signal to the next-level LED driving circuit and/or the subsequent LED driving circuit bridged thereto.
  • the first-level LED driving circuit Dc1 uses the first display data D0 as the display data of the current-level LED driving circuit.
  • the LED driving circuit forwards the configuration signals and data signals of the LED driving circuits cascaded after the LED driving circuit of the current stage to the LED driving circuit of the next stage and/or the subsequent LED driving circuit connected thereto through the output terminal Do.
  • the LED driving circuit when the LED driving circuit receives the configuration signal and the data signal from the main input terminal Din0, the LED driving circuit uses the display data after the first display data in the data signal as the new The data signal is forwarded to the next-level LED driving circuit and/or the subsequent LED driving circuit connected thereto; and the configuration instruction in the configuration signal and the bridging parameter after the first bridging parameter are used as a new configuration The signal is forwarded to the next-stage LED drive circuit and/or the subsequent-stage LED drive circuit connected thereto.
  • the LED driving circuit When the LED driving circuit receives the configuration signal and the data signal from the standby input terminal Din1, the display data after the k+1th data signal in the data signal is forwarded to the next stage as a new data signal The LED driver circuit and/or the subsequent stage LED driver circuit connected thereto; and forwarding the configuration command in the configuration signal and the first connection parameter after the first connection parameter to the next-level LED driver as a new configuration signal circuit and/or the subsequent LED drive circuit connected across it, wherein, k is the connection parameter of the LED drive circuit of this stage.
  • the current-level LED drive circuit generates a drive signal according to the display data of the current-level drive circuit; forwards the display data after the display data to the next-level LED drive circuit.
  • the first jump parameter in the configuration signal is used as the jump parameter of the current-level LED drive circuit; according to The bridging parameter of the current-level LED driving circuit uses the k+1th data signal in the data signal as the display data of the current-level LED driving circuit, wherein k is the bridging parameter of the current-level LED driving circuit to achieve multiple Continuous damage to one circuit may not affect the normal operation of subsequent circuits.
  • Fig. 6 shows a schematic structural diagram of an LED driving circuit provided according to an embodiment of the present invention.
  • the LED drive circuit 210 includes a main input terminal Din0, a spare input terminal Din1 and an output terminal Do, as well as an input detection module 211, a data processing module 212, a bridge processing module 213, a video memory module 214, and a driving module. 215 and data forwarding module 216.
  • the input detection module 211 is configured to send the configuration signal and the data signal to the data processing module 212 when detecting that the configuration signal and the data signal are received from the main input terminal Din0.
  • the data processing module 212 is used to use the first display data in the data signal as the display data of the LED driving circuit at the current stage.
  • the display memory module 213 is used for buffering the display data of the current LED driving circuit.
  • the driving module 214 is used to generate a driving signal according to the display data of the current LED driving circuit, and the driving signal is used to drive the LED light string.
  • the configuration signal includes a configuration instruction Ins and a crossover parameter (k1+k2+...+ki+%), and the crossover parameter is the current-level LED drive circuit and the previous-stage LED driver with crossover.
  • the data signal includes a plurality of display data (D0+D1+D2+...+Dn-1+).
  • the input detection module 211 is further configured to send the configuration signal and the data signal to the data processing module across the processing module 213 when detecting that the configuration signal and the data signal are received from the spare input terminal.
  • the bridging processing module 213 is used to use the first bridging parameter in the configuration signal as the bridging parameter of the current LED drive circuit.
  • the data processing module 212 is configured to use the k+1 th data signal among the data signals as the display data of the LED driving circuit at the current stage according to the bridging parameters of the LED driving circuit at the current stage.
  • the data forwarding module 216 is used for forwarding the configuration signal and data signal of the cascaded LED driving circuit after the current LED driving circuit to the next LED driving circuit and/or the subsequent LED driving circuit connected thereto.
  • the data forwarding module 216 forwards the display data following the first display data in the data signal to the next stage as a new data signal The LED driver circuit and/or the subsequent stage LED driver circuit connected thereto; and forwarding the configuration command in the configuration signal and the first connection parameter after the first connection parameter to the next-level LED driver as a new configuration signal circuit and/or the subsequent LED drive circuit connected across it.
  • the data forwarding module 216 forwards the display data after the k+1th data signal in the data signal to the next-level LED as a new data signal The driving circuit and/or the subsequent LED driving circuit connected thereto; and forwarding the configuration instruction in the configuration signal and the connecting parameter after the first connecting parameter to the next LED driving circuit as a new configuration signal And/or the subsequent stage LED drive circuit connected thereto, wherein, k is the connection parameter of the LED drive circuit of this stage.
  • the first jump parameter in the configuration signal is used as the jump parameter of the LED drive circuit of the current stage; according to The bridging parameter of the current-level LED driving circuit uses the k+1th data signal in the data signal as the display data of the current-level LED driving circuit, wherein k is the bridging parameter of the current-level LED driving circuit to achieve multiple Continuous damage to one circuit may not affect the normal operation of subsequent circuits.
  • Fig. 7 shows a flowchart of a driving method of an LED driving circuit according to an embodiment of the present invention. Referring to Fig. 7, the driving method includes the following steps.
  • step S101 it is detected whether the LED driving circuit receives configuration signals and data signals from the main input terminal or the standby input terminal.
  • the configuration signal includes a configuration instruction Ins and a crossover parameter (k1+k2+...+ki+%), and the crossover parameter is the current-level LED drive circuit and the previous-stage LED driver with crossover.
  • the data signal includes a plurality of display data (D0+D1+D2+...+Dn-1+).
  • step S102-step S104 are executed.
  • step S105 is executed.
  • step S102 the first jump parameter in the configuration signal is used as the jump parameter of the LED drive circuit at the current stage.
  • step S103 the k+1th data signal in the data signal is used as the display data of the LED driving circuit of the current stage according to the crossover parameter of the LED driving circuit of the present stage, wherein k is the crossover parameter of the LED driving circuit of the present stage Connect parameters.
  • the main input terminal Din0 of the second-stage LED drive circuit Dc2 cannot receive configuration signals and data signals from the first-stage LED drive circuit Dc1, and its backup input terminal Din1 is connected to the control terminal 100
  • the second data signal D1 among the data signals is used as the display data of the second-stage LED driving circuit Dc2.
  • step S104 when it is detected that the configuration signal and the data signal are received from the main input terminal, the first display data in the data signal is used as the display data of the LED driving circuit at the current stage.
  • the first-level LED driving circuit Dc1 uses the first display data D0 as the display data of the current-level LED driving circuit.
  • step S105 the configuration signal and data signal of the cascaded LED driving circuit after the LED driving circuit of the current stage are forwarded to the LED driving circuit of the next stage and/or the subsequent LED driving circuit connected thereto.
  • the data forwarding module 216 forwards the display data following the first display data in the data signal to the next stage as a new data signal The LED driver circuit and/or the subsequent stage LED driver circuit connected thereto; and forwarding the configuration command in the configuration signal and the first connection parameter after the first connection parameter to the next-level LED driver as a new configuration signal circuit and/or the subsequent LED drive circuit connected across it.
  • the data forwarding module 216 forwards the display data after the k+1th data signal in the data signal to the next-level LED as a new data signal The driving circuit and/or the subsequent LED driving circuit connected thereto; and forwarding the configuration instruction in the configuration signal and the connecting parameter after the first connecting parameter to the next LED driving circuit as a new configuration signal And/or the subsequent stage LED drive circuit connected thereto, wherein, k is the connection parameter of the LED drive circuit of this stage.
  • the first crossover parameter in the configuration signal is used as the crossover parameter of the LED driving circuit at this stage.

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Abstract

本申请公开了一种LED驱动电路及其驱动方法、LED显示系统，LED驱动电路包括主输入端、至少一个备用输入端和输出端；LED驱动电路经由主输入端从上一级LED驱动电路接收配置信号和数据信号，或者经由备用输入端从任一前级LED驱动电路接收配置信号和数据信号，前级LED驱动电路与本级LED驱动电路之间相隔至少1个LED驱动电路；LED驱动电路经由输出端将本级LED驱动电路之后级联的LED驱动电路的配置信号和数据信号转发至下一级LED驱动电路和/或与其跨接的后级LED驱动电路，后级LED驱动电路与本级LED驱动电路之间相隔至少1个LED驱动电路。本申请可实现多个电路连续损坏也不影响后续电路的正常工作。

Description

LED驱动电路及驱动方法、LED显示系统
本申请要求了申请日为2021年10月11日、申请号为2021111829988、名称为“LED驱动电路及驱动方法、LED显示系统”的中国发明申请的优先权，并且通过参照上述中国发明申请的全部说明书、权利要求、附图和摘要的方式，将其引用于本申请。
技术领域
本发明涉及LED显示技术领域，具体地，涉及LED驱动电路及驱动方法、LED显示系统。
背景技术
室外景观照明和辅助照明等应用工程中，低功率LED芯片应用广泛。LED灯串及由LED灯串按照预定的规则制造的LED外墙显示屏用于显示各种图案和文字信息。这类LED灯串及LED灯串组合的LED显示屏系统包括控制端和LED显示屏。LED显示屏包括多个LED灯串单元，每个LED灯串单元对应于LED显示屏的一块显示区域。LED灯串单元可以单个使用，或者多个LED灯串单元依次级联成一组，以扩展显示屏的显示面积。每个LED灯串单元一般由LED驱动电路和若干个LED灯组成。每个LED灯串单元的驱动电路，既担当着LED驱动的任务，又担当着将来自上一LED灯串单元的驱动电路转发出来的控制信号进行信号重建的任务，从而以串行通信的方式从灯串的一端将控制信息逐个转发至下一个驱动电路，直至最后一个LED灯串单元的驱动电路。
然而，当LED显示屏系统中LED灯串单元的某个驱动电路或者连续多个驱动电路出现故障时，该驱动电路的信号输出端将无法输出正常的控制信号，导致该驱动电路及其之后的驱动电路所控制的LED灯都无法正常点亮，影响图像显示。
发明内容
鉴于上述问题，本发明的目的在于提供一种LED驱动电路及驱动方法、LED显示系统，在连续的驱动电路出现故障时依然可以保证后续级驱动的LED串仍可以被正常驱动。
根据本发明的第一方面，提供一种LED驱动电路，包括主输入端、至少一个备用输入端和输出端；LED驱动电路经由主输入端从上一级LED驱动电路接收配置信号和数据信号，或者经由备用输入端从任一前级LED驱动电路接收配置信号和数据信号，所述前级LED驱动电路与本级LED驱动电路之间相隔至少1个LED驱动电路；所述LED驱动电路经由输出端将本级LED驱动电路之后级联的LED驱动电路的配置信号和数据信号转发至下一级LED驱动电路和/或与其跨接的后级LED驱动电路，所述后级LED驱动电路与本级LED驱动电路之间相隔至少1个LED驱动电路。
优选地，所述配置信号包括配置指令和跨接参数，所述跨接参数为本级LED驱动电路与前级LED驱动电路之间相隔的LED驱动电路的数量，所述数据信号包括多个显示数据。
优选地，当所述LED驱动电路在从备用输入端接收所述配置信号和所述数据信号时，将配置信号中的第一个跨接参数作为本级LED驱动电路的跨接参数；根据本级LED驱动电路的跨接参数将所述数据信号中的第k+1个数据信号作为本级LED驱动电路的显示数据，其中，k为本级LED驱动电路的跨接参数。
优选地，当所述LED驱动电路在从备用输入端接收所述配置信号和所述数据信号时，将所述数据信号中第k+1个数据信号之后的显示数据作为新的数据信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路；以及将配置信号中的配置指令和第一个跨接参数之后的跨接参数作为新的配置信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路。
优选地，当所述LED驱动电路在从主输入端接收所述配置信号和所述数据信号时，所述LED驱动电路将所述数据信号中第一个显示数据作 为本级LED驱动电路的显示数据。
优选地，当所述LED驱动电路在从主输入端接收所述配置信号和所述数据信号时，LED驱动电路将所述数据信号中第一个显示数据之后的显示数据作为新的数据信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路；以及将配置信号中的配置指令和第一个跨接参数之后的跨接参数作为新的配置信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路。
优选地，第一级LED驱动电路的主输入端与所述控制端连接。
优选地，第一级LED驱动电路之后的任一所述LED驱动电路的主输入端与上一级LED驱动电路连接；备用输入端悬空或者与任一前级LED驱动电路的输出端跨接；输出端与下一级LED驱动电路的主输入端连接，以及与任一后级LED驱动电路的备用输入端跨接。
优选地，所述LED驱动电路包括输入检测模块、数据处理模块、显存模块和驱动模块，其中，输入检测模块用于当检测到从主输入端接收所述配置信号和所述数据信号时，将所述配置信号和所述数据信号发送至所述数据处理模块；所述数据处理模块用于将所述数据信号中第一个显示数据作为本级LED驱动电路的显示数据；所述显存模块用于将本级LED驱动电路的显示数据进行缓存；所述驱动模块用于根据本级LED驱动电路的显示数据产生驱动信号，所述驱动信号用于驱动LED灯串。
优选地，所述LED驱动电路还包括跨接处理模块，所述输入检测模块还用于当检测到从备用输入端接收所述配置信号和所述数据信号时，将所述配置信号和所述数据信号发送至所述数据处理模块跨接处理模块；所述跨接处理模块用于将配置信号中的第一个跨接参数作为本级LED驱动电路的跨接参数；所述数据处理模块还用于根据本级LED驱动电路的跨接参数将所述数据信号中的第k+1个数据信号作为本级LED驱动电路的显示数据。
优选地，所述LED驱动电路还包括：数据转发模块，用于将本级LED驱动电路之后级联的LED驱动电路的配置信号和数据信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路。
优选地，所述输入检测模块检测到从备用输入端接收所述配置信号和所述数据信号时，所述数据转发模块将所述数据信号中第k+1个数据信号之后的显示数据作为新的数据信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路；以及将配置信号中的配置指令和第一个跨接参数之后的跨接参数作为新的配置信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路。
优选地，所述输入检测模块检测到从主输入端接收所述配置信号和所述数据信号时，所述数据转发模块将所述数据信号中第一个显示数据之后的显示数据作为新的数据信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路；以及将配置信号中的配置指令和第一个跨接参数之后的跨接参数作为新的配置信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路。
根据本发明的另一方面，提供一种LED显示系统，包括控制端和多个级联的LED灯串单元，每个LED灯串单元包括如上述所述的LED驱动电路和LED灯串，包括：所述控制端向所述LED灯串单元发送配置信号和数据信号，其中，所述配置信号包括配置指令和跨接参数，所述数据信号包括多个显示数据；所述多个级联的LED灯串单元中的LED驱动电路从备用输入端接收所述配置信号和所述数据信号时，根据所述配置信号中的跨接参数将所述数据信号中的第k+1个数据信号作为本级LED驱动电路的显示数据，其中，k为本级LED驱动电路的跨接参数。
优选地，所述多个级联的LED灯串单元中的LED驱动电路从主输入端接收所述配置信号和所述数据信号时，将所述数据信号中第一个显示数据作为本级LED驱动电路的显示数据。
根据本发明的第三方面，提供一种LED驱动电路的驱动方法，所述LED驱动电路包括主输入端、至少一个备用输入端和输出端，其特征在于，包括：检测所述LED驱动电路从主输入端还是从备用输入端接收配置信号和数据信号，其中，所述配置信号包括配置指令和跨接参数，所述跨接参数为本级LED驱动电路与前级LED驱动电路之间相隔的LED驱动电路的数量，所述数据信号包括多个显示数据；当检测到从备用输 入端接收配置信号和数据信号时，将配置信号中的第一个跨接参数作为本级LED驱动电路的跨接参数；根据本级LED驱动电路的跨接参数将所述数据信号中的第k+1个数据信号作为本级LED驱动电路的显示数据，其中，k为本级LED驱动电路的跨接参数。
优选地，所述驱动方法还包括：将所述数据信号中第k+1个数据信号之后的显示数据作为新的数据信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路；以及将配置信号中的配置指令和第一个跨接参数之后的跨接参数作为新的配置信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路。
优选地，所述驱动方法还包括：当检测到从主输入端接收所述配置信号和所述数据信号时，将所述数据信号中第一个显示数据作为本级LED驱动电路的显示数据。
优选地，所述驱动方法还包括：将所述数据信号中第一个显示数据之后的显示数据作为新的数据信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路；以及将配置信号中的配置指令和第一个跨接参数之后的跨接参数作为新的配置信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路。
根据本发明实施例的LED驱动电路及其驱动方法、LED显示系统，在从备用输入端接收所述配置信号和所述数据信号时，将配置信号中的第一个跨接参数作为本级LED驱动电路的跨接参数；根据本级LED驱动电路的跨接参数将所述数据信号中的第k+1个数据信号作为本级LED驱动电路的显示数据，其中，k为本级LED驱动电路的跨接参数，以实现多个电路连续损坏也可不影响后续电路的正常工作。
附图说明
通过以下参照附图对本发明实施例的描述，本发明的上述以及其他目的、特征和优点将更为清楚，在附图中：
图1示出现有技术中LED显示系统的示意图；
图2示出现有技术中另一种LED显示系统的示意图；
图3示出根据本发明实施例的LED显示系统的结构示意图；
图4示出根据本发明实施例LED灯串驱动控制中所涉及的驱动数据处理方式的示意图；
图5示出根据本发明实施例LED灯串驱动控制中所涉及的另一种驱动数据处理方式的示意图；
图6示出根据本发明实施例的LED驱动电路的结构示意图；
图7示出根据本发明实施例的LED驱动电路的驱动方法的流程图。
具体实施方式
以下将参照附图更详细地描述本发明的各种实施例。在各个附图中，相同的元件采用相同或类似的附图标记来表示。为了清楚起见，附图中的各个部分没有按比例绘制。
下面结合附图和实施例，对本发明的具体实施方式作进一步详细描述。
图1示出现有技术中LED显示系统的示意性框图。该LED显示系统包括控制端100和LED显示屏200，控制端100与LED显示屏200相连。LED显示屏200包括多个级联的LED灯串单元(C1-Cn)。每一个LED灯串单元包括至少一个LED驱动电路和LED灯串。多个级联的LED灯串单元的多个LED驱动电路串接在一起。
控制端100向LED显示屏200提供数据信号，其中，数据信号包括多个级联的LED灯串单元的显示数据。
每个LED灯串单元中的LED驱动电路只有一个输入端Din和一个输出端Do，每一级的LED驱动电路的输出端Do向下一级LED驱动电路的输入端Din发送数据信号。当系统中某个LED驱动电路发生故障时，该驱动电路的输出端Do无法向下一级LED驱动电路发送数据信号，导致该LED驱动电路及其之后的LED驱动电路所控制的LED灯都无法正常点亮，影响图像显示。
图2示出现有技术中另一种LED显示系统的示意图。参见图2，每 个LED灯串单元中的LED驱动电路包括主输入端Din0和备用输入端Din1以及输出端Do。其中，主输入端Din0与上一级LED驱动电路的输出端Do连接；备用输入端Din1与前级LED驱动电路的输出端，所述前级LED驱动电路与所述本级驱动电路之间相隔一个LED驱动电路。
该LED显示系统可以有效地避免出现LED灯串中单颗LED驱动电路出错时导致整串LED灯故障的现象。但实际应用中，LED灯串尤其是LED灯串组成的显示屏，容易出现连续多颗LED驱动电路损坏的情况，例如在屏体的边缘处，由于运输、安装过程中的磕碰导致连续灯坏。在这种情况下，该LED显示系统在一旦有连续多个LED驱动电路损坏的情况下，仍会使后续所有串接的LED灯失效，影响显示。
图3示出根据本发明实施例提供的LED显示系统的示意图。参见图3，每个LED灯串单元中的LED驱动电路包括主输入端Din0和备用输入端Din1以及输出端Do。
LED驱动电路的主输入端与上一级LED驱动电路连接。
在本实施例中，当所述LED驱动电路为第一级LED驱动电路时，其主输入端Din0与所述控制端100连接。当LED驱动电路为后续级别的LED驱动电路时，其主输入端Din0均与上一级LED驱动电路的输出端Do连接。
每一级LED驱动电路的备用输入端Din1与前级LED驱动电路连接，所述前级LED驱动电路与本级LED驱动电路之间相隔至少1个LED驱动电路。
每一级驱动电路的输出端Do与下一级LED驱动电路的主输入端连接，以及与任一后级LED驱动电路的备用输入端跨接。所述后级LED驱动电路与本级LED驱动电路之间相隔至少1个LED驱动电路。
当每一级LED驱动电路只有一个备用输入端Din1时，每一级LED驱动电路的输出端Do只提供一个备用信号，该备用信号与该LED驱动电路之后的其中一个LED驱动电路的备用输入端Din1连接。当出现跨接时，LED驱动电路的备用输入端Din1悬空或者与任一前级LED驱动电路的输出端跨接。
当每一级LED驱动电路包括m个备用输入端(Din1、Din2、……Dinm)时，每一级LED驱动电路的输出端Do可以提供q个备用信号，其中，m为大于1的整数，q为正整数，q≤m，q个备用信号分别与其之后的q个LED驱动电路的m个备用输入端(Din1、Din2、……)中的任意一个连接。
图3所示的LED驱动电路的连接方式仅仅为其中一个示例，并不限于此。例如，控制端100的输出与第二级LED驱动电路Dc2的备用输入端Din1连接；第一级LED驱动电路Dc1的输出端与第四级LED驱动电路Dc4的备用输入端Din1连接，第三级LED驱动电路Dc3的备用输入端Din1悬空。
LED驱动电路经由主输入端Din0从上一级LED驱动电路接收配置信号和数据信号，或者经由备用输入端Din1从任一前级LED驱动电路接收配置信号和数据信号。
在本实施例中，所述配置信号包括配置指令Ins和跨接参数(k1+k2+……+ki+……)，所述跨接参数为存在跨接的本级LED驱动电路与前级LED驱动电路之间相隔的LED驱动电路的数量。所述数据信号包括多个显示数据(D0+D1+D2+……+Dn-1+……)。当跨接参数ki≥1时，相应的本级LED驱动电路与前级LED驱动电路之间相隔ki个LED驱动电路。
当所述LED驱动电路在从备用输入端Din1接收所述配置信号和所述数据信号时，将配置信号中的第一个跨接参数作为本级LED驱动电路的跨接参数；根据本级LED驱动电路的跨接参数将所述数据信号中的第k+1个数据信号作为本级LED驱动电路的显示数据，其中，k为本级LED驱动电路的跨接参数。所述LED驱动电路将配置信号中的配置指令和第一个跨接参数之后的跨接参数作为新的配置信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路。
例如，第一级LED驱动电路Dc1出现故障，第二级LED驱动电路Dc2的主输入端Din0无法从第一级LED驱动电路Dc1接收配置信号和数据信号，其备用输入端Din1从控制端100接收配置信号和数据信号， 将配置信号中的第一个跨接参数k1作为第二级LED驱动电路Dc2的跨接参数，此时k1＝1。根据该跨接参数k1将数据信号中的第2个数据信号D1作为第二级LED驱动电路Dc2的显示数据。第二级LED驱动电路Dc2将配置信号中的第一个跨接参数k1去除作为新的配置信号转发至下一级LED驱动电路和/或与其跨接的后级LED驱动电路。
第一级LED驱动电路Dc1正常工作时，第一级LED驱动电路将第一个显示数据D0作为本级LED驱动电路的显示数据。
所述LED驱动电路经由输出端Do将本级LED驱动电路之后级联的LED驱动电路的配置信号和数据信号转发至下一级LED驱动电路和/或与其跨接的后级LED驱动电路。
在本实施例中，当所述LED驱动电路在从主输入端Din0接收所述配置信号和所述数据信号时，LED驱动电路将所述数据信号中第一个显示数据之后的显示数据作为新的数据信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路；以及将配置信号中的配置指令和第一个跨接参数之后的跨接参数作为新的配置信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路。
当所述LED驱动电路从备用输入端Din1接收所述配置信号和所述数据信号时，将所述数据信号中第k+1个数据信号之后的显示数据作为新的数据信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路；以及将配置信号中的配置指令和第一个跨接参数之后的跨接参数作为新的配置信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路，其中，k为本级LED驱动电路的跨接参数。
参见图4，每个LED驱动电路均能正常工作的情况下，D0为LED驱动电路Dc1的显示数据；D1为LED驱动电路Dc2的显示数据；D2为LED驱动电路Dc3的显示数据，Dn-1为LED驱动电路Dcn的显示数据。本级LED驱动电路根据本级驱动电路的显示数据产生驱动信号；把那个将该显示数据之后的显示数据转发至下一级LED驱动电路。
参见图5，LED驱动电路Dc1从控制端接收所有的显示数据，并正常将第一个显示数据D0作为本级LED驱动电路的显示数据；LED驱 动电路Dc2的备用输入端从控制端接收所有的显示数据，LED驱动电路Dc2根据跨接参数k1＝1将第二个显示数据D1作为本级LED驱动电路的显示数据；LED驱动电路Dc3的备用输入端Din1悬空，其主输入端Din0从LED驱动电路Dc2接收配置信号和数据信号，并将此时的第一个显示数据D2作为本级LED驱动电路的显示数据。LED驱动电路Dc4采用备用输入端Din1从LED驱动电路Dc1接收配置信号和数据信号时，根据跨接参数k2＝2将数据信号中的第3个数据信号D3作为本级LED驱动电路的显示数据。
本发明实施例提供的LED显示系统，在从备用输入端接收所述配置信号和所述数据信号时，将配置信号中的第一个跨接参数作为本级LED驱动电路的跨接参数；根据本级LED驱动电路的跨接参数将所述数据信号中的第k+1个数据信号作为本级LED驱动电路的显示数据，其中，k为本级LED驱动电路的跨接参数，以实现多个电路连续损坏也可不影响后续电路的正常工作。
图6示出根据本发明实施例提供的LED驱动电路的结构示意图。如图6所示，所述LED驱动电路210包括主输入端Din0、备用输入端Din1和输出端Do，以及输入检测模块211、数据处理模块212、跨接处理模块213、显存模块214、驱动模块215以及数据转发模块216。
其中，输入检测模块211用于当检测到从主输入端Din0接收所述配置信号和所述数据信号时，将所述配置信号和所述数据信号发送至所述数据处理模块212。所述数据处理模块212用于将所述数据信号中第一个显示数据作为本级LED驱动电路的显示数据。所述显存模块213用于将本级LED驱动电路的显示数据进行缓存。所述驱动模块214用于根据本级LED驱动电路的显示数据产生驱动信号，所述驱动信号用于驱动LED灯串。
在本实施例中，所述配置信号包括配置指令Ins和跨接参数(k1+k2+……+ki+……)，所述跨接参数为存在跨接的本级LED驱动电路与前级LED驱动电路之间相隔的LED驱动电路的数量。所述数据信号包括多个显示数据(D0+D1+D2+……+Dn-1+……)。当跨接参数ki≥1时， 相应的本级LED驱动电路与前级LED驱动电路之间相隔ki个LED驱动电路。
输入检测模块211还用于当检测到从备用输入端接收所述配置信号和所述数据信号时，将所述配置信号和所述数据信号发送至所述数据处理模块跨接处理模块213。所述跨接处理模块213用于将配置信号中的第一个跨接参数作为本级LED驱动电路的跨接参数。所述数据处理模块212用于根据本级LED驱动电路的跨接参数将所述数据信号中的第k+1个数据信号作为本级LED驱动电路的显示数据。
数据转发模块216用于将本级LED驱动电路之后级联的LED驱动电路的配置信号和数据信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路。
具体地，在从主输入端Din0接收所述配置信号和所述数据信号时，数据转发模块216将所述数据信号中第一个显示数据之后的显示数据作为新的数据信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路；以及将配置信号中的配置指令和第一个跨接参数之后的跨接参数作为新的配置信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路。
在从备用输入端Din1接收所述配置信号和所述数据信号时，数据转发模块216将所述数据信号中第k+1个数据信号之后的显示数据作为新的数据信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路；以及将配置信号中的配置指令和第一个跨接参数之后的跨接参数作为新的配置信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路，其中，k为本级LED驱动电路的跨接参数。
本发明实施例提供的LED驱动电路，在从备用输入端接收所述配置信号和所述数据信号时，将配置信号中的第一个跨接参数作为本级LED驱动电路的跨接参数；根据本级LED驱动电路的跨接参数将所述数据信号中的第k+1个数据信号作为本级LED驱动电路的显示数据，其中，k为本级LED驱动电路的跨接参数，以实现多个电路连续损坏也可不影响后续电路的正常工作。
图7示出根据本发明实施例的LED驱动电路的驱动方法的流程图。参见图7，所述驱动方法包括以下步骤。
在步骤S101中，检测所述LED驱动电路从主输入端还是从备用输入端接收配置信号和数据信号。
在本实施例中，所述配置信号包括配置指令Ins和跨接参数(k1+k2+……+ki+……)，所述跨接参数为存在跨接的本级LED驱动电路与前级LED驱动电路之间相隔的LED驱动电路的数量。所述数据信号包括多个显示数据(D0+D1+D2+……+Dn-1+……)。当跨接参数ki≥1时，相应的本级LED驱动电路与前级LED驱动电路之间相隔ki个LED驱动电路。
当检测到从备用输入端接收配置信号和数据信号时，执行步骤S102-步骤S104。当检测到从主输入端接收配置信号和数据信号时，执行步骤S105。
在步骤S102中，将配置信号中的第一个跨接参数作为本级LED驱动电路的跨接参数。
在步骤S103中，根据本级LED驱动电路的跨接参数将所述数据信号中的第k+1个数据信号作为本级LED驱动电路的显示数据，其中，k为本级LED驱动电路的跨接参数。
具体地，第一级LED驱动电路Dc1出现故障，第二级LED驱动电路Dc2的主输入端Din0无法从第一级LED驱动电路Dc1接收配置信号和数据信号，其备用输入端Din1从控制端100接收配置信号和数据信号，将配置信号中的第一个跨接参数k1作为第二级LED驱动电路Dc2的跨接参数，此时k1＝1。根据该跨接参数k1将数据信号中的第2个数据信号D1作为第二级LED驱动电路Dc2的显示数据。
在步骤S104中，当检测到从主输入端接收所述配置信号和所述数据信号时，将所述数据信号中第一个显示数据作为本级LED驱动电路的显示数据。
具体地，第一级LED驱动电路Dc1正常工作时，第一级LED驱动电路将第一个显示数据D0作为本级LED驱动电路的显示数据。
在步骤S105中，将本级LED驱动电路之后级联的LED驱动电路的配置信号和数据信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路。
具体地，在从主输入端Din0接收所述配置信号和所述数据信号时，数据转发模块216将所述数据信号中第一个显示数据之后的显示数据作为新的数据信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路；以及将配置信号中的配置指令和第一个跨接参数之后的跨接参数作为新的配置信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路。
在从备用输入端Din1接收所述配置信号和所述数据信号时，数据转发模块216将所述数据信号中第k+1个数据信号之后的显示数据作为新的数据信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路；以及将配置信号中的配置指令和第一个跨接参数之后的跨接参数作为新的配置信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路，其中，k为本级LED驱动电路的跨接参数。
本发明实施例提供的LED驱动电路的驱动方法，在从备用输入端接收所述配置信号和所述数据信号时，将配置信号中的第一个跨接参数作为本级LED驱动电路的跨接参数；根据本级LED驱动电路的跨接参数将所述数据信号中的第k+1个数据信号作为本级LED驱动电路的显示数据，其中，k为本级LED驱动电路的跨接参数，以实现多个电路连续损坏也可不影响后续电路的正常工作。
依照本发明的实施例如上文所述，这些实施例并没有详尽叙述所有的细节，也不限制该发明仅为所述的具体实施例。显然，根据以上描述，可作很多的修改和变化。本说明书选取并具体描述这些实施例，是为了更好地解释本发明的原理和实际应用，从而使所属技术领域技术人员能很好地利用本发明以及在本发明基础上的修改使用。本发明仅受权利要求书及其全部范围和等效物的限制。

Claims (19)

  1. 一种LED驱动电路，其特征在于，包括主输入端、至少一个备用输入端和输出端；
    LED驱动电路经由主输入端从上一级LED驱动电路接收配置信号和数据信号，或者经由备用输入端从任一前级LED驱动电路接收配置信号和数据信号，所述前级LED驱动电路与本级LED驱动电路之间相隔至少1个LED驱动电路；
    所述LED驱动电路经由输出端将本级LED驱动电路之后级联的LED驱动电路的配置信号和数据信号转发至下一级LED驱动电路和/或与其跨接的后级LED驱动电路，所述后级LED驱动电路与本级LED驱动电路之间相隔至少1个LED驱动电路。
  2. 根据权利要求1所述的LED驱动电路，其特征在于，所述配置信号包括配置指令和跨接参数，所述跨接参数为本级LED驱动电路与前级LED驱动电路之间相隔的LED驱动电路的数量，所述数据信号包括多个显示数据。
  3. 根据权利要求2所述的LED驱动电路，其特征在于，当所述LED驱动电路在从备用输入端接收所述配置信号和所述数据信号时，将配置信号中的第一个跨接参数作为本级LED驱动电路的跨接参数；根据本级LED驱动电路的跨接参数将所述数据信号中的第k+1个数据信号作为本级LED驱动电路的显示数据，其中，k为本级LED驱动电路的跨接参数。
  4. 根据权利要求2所述的LED驱动电路，其特征在于，当所述LED驱动电路在从备用输入端接收所述配置信号和所述数据信号时，将所述数据信号中第k+1个数据信号之后的显示数据作为新的数据信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路；以及将配置信号中的配置指令和第一个跨接参数之后的跨接参数作为新的配置信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路。
  5. 根据权利要求2所述的LED驱动电路，其特征在于，当所述LED驱动电路在从主输入端接收所述配置信号和所述数据信号时，所述LED驱动电路将所述数据信号中第一个显示数据作为本级LED驱动电路的显示数据。
  6. 根据权利要求2所述的LED驱动电路，其特征在于，当所述LED驱动电路在从主输入端接收所述配置信号和所述数据信号时，LED驱动电路将所述数据信号中第一个显示数据之后的显示数据作为新的数据信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路；以及将配置信号中的配置指令和第一个跨接参数之后的跨接参数作为新的配置信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路。
  7. 根据权利要求1所述的LED驱动电路，其特征在于，第一级LED驱动电路的主输入端与控制端连接。
  8. 根据权利要求7所述的LED驱动电路，其特征在于，第一级LED驱动电路之后的任一所述LED驱动电路的主输入端与上一级LED驱动电路连接；
    备用输入端悬空或者与任一前级LED驱动电路的输出端跨接；
    输出端与下一级LED驱动电路的主输入端连接，以及与任一后级LED驱动电路的备用输入端跨接。
  9. 根据权利要求1所述的LED驱动电路，其特征在于，所述LED驱动电路包括输入检测模块、数据处理模块、显存模块和驱动模块，
    其中，输入检测模块用于当检测到从主输入端接收所述配置信号和所述数据信号时，将所述配置信号和所述数据信号发送至所述数据处理模块；
    所述数据处理模块用于将所述数据信号中第一个显示数据作为本级LED驱动电路的显示数据；
    所述显存模块用于将本级LED驱动电路的显示数据进行缓存；
    所述驱动模块用于根据本级LED驱动电路的显示数据产生驱动信号，所述驱动信号用于驱动LED灯串。
  10. 根据权利要求9所述的LED驱动电路，其特征在于，所述LED驱动电路还包括跨接处理模块，
    所述输入检测模块还用于当检测到从备用输入端接收所述配置信号和所述数据信号时，将所述配置信号和所述数据信号发送至所述数据处理模块跨接处理模块；
    所述跨接处理模块用于将配置信号中的第一个跨接参数作为本级LED驱动电路的跨接参数；
    所述数据处理模块还用于根据本级LED驱动电路的跨接参数将所述数据信号中的第k+1个数据信号作为本级LED驱动电路的显示数据。
  11. 根据权利要求10所述的LED驱动电路，其特征在于，还包括：
    数据转发模块，用于将本级LED驱动电路之后级联的LED驱动电路的配置信号和数据信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路。
  12. 根据权利要求11所述的LED驱动电路，其特征在于，所述输入检测模块检测到从备用输入端接收所述配置信号和所述数据信号时，所述数据转发模块将所述数据信号中第k+1个数据信号之后的显示数据作为新的数据信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路；以及将配置信号中的配置指令和第一个跨接参数之后的跨接参数作为新的配置信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路。
  13. 根据权利要求11所述的LED驱动电路，其特征在于，所述输入检测模块检测到从主输入端接收所述配置信号和所述数据信号时，所述数据转发模块将所述数据信号中第一个显示数据之后的显示数据作为新的数据信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路；以及将配置信号中的配置指令和第一个跨接参数之后的跨接参数作为新的配置信号转发至下一级LED驱动电路和/或与其跨接的所述后级LED驱动电路。
  14. 一种LED显示系统，其特征在于，包括控制端和多个级联的LED灯串单元，每个LED灯串单元包括如权利要求1-13中任一项所述 的LED驱动电路和LED灯串，
    所述控制端向所述LED灯串单元发送配置信号和数据信号，其中，所述配置信号包括配置指令和跨接参数，所述数据信号包括多个显示数据；
    所述多个级联的LED灯串单元中的LED驱动电路从备用输入端接收所述配置信号和所述数据信号时，根据所述配置信号中的跨接参数将所述数据信号中的第k+1个数据信号作为本级LED驱动电路的显示数据，其中，k为本级LED驱动电路的跨接参数。
  15. 根据权利要求14所述的LED显示系统，其特征在于，所述多个级联的LED灯串单元中的LED驱动电路从主输入端接收所述配置信号和所述数据信号时，将所述数据信号中第一个显示数据作为本级LED驱动电路的显示数据。
  16. 一种LED驱动电路的驱动方法，所述LED驱动电路包括主输入端、至少一个备用输入端和输出端，其特征在于，包括：
    检测所述LED驱动电路从主输入端还是从备用输入端接收配置信号和数据信号，其中，所述配置信号包括配置指令和跨接参数，所述跨接参数为本级LED驱动电路与前级LED驱动电路之间相隔的LED驱动电路的数量，所述数据信号包括多个显示数据；
    当检测到从备用输入端接收配置信号和数据信号时，将配置信号中的第一个跨接参数作为本级LED驱动电路的跨接参数；
    根据本级LED驱动电路的跨接参数将所述数据信号中的第k+1个数据信号作为本级LED驱动电路的显示数据，其中，k为本级LED驱动电路的跨接参数。
  17. 根据权利要求16所述的驱动方法，其特征在于，还包括：
    将所述数据信号中第k+1个数据信号之后的显示数据作为新的数据信号转发至下一级LED驱动电路和/或与其跨接的后级LED驱动电路；以及将配置信号中的配置指令和第一个跨接参数之后的跨接参数作为新的配置信号转发至下一级LED驱动电路和/或与其跨接的后级LED驱动电路。
  18. 根据权利要求16所述的驱动方法，其特征在于，还包括：
    当检测到从主输入端接收所述配置信号和所述数据信号时，将所述数据信号中第一个显示数据作为本级LED驱动电路的显示数据。
  19. 根据权利要求18所述的驱动方法，其特征在于，还包括：
    将所述数据信号中第一个显示数据之后的显示数据作为新的数据信号转发至下一级LED驱动电路和/或与其跨接的后级LED驱动电路；以及将配置信号中的配置指令和第一个跨接参数之后的跨接参数作为新的配置信号转发至下一级LED驱动电路和/或与其跨接的后级LED驱动电路。
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