Driving circuit group, LED lamp string and LED display system

Abstract

The utility model relates to a driving circuit group, an LED lamp string and an LED display system. The driving circuit group comprises N driving circuits; the first input end of the first driving circuit is used for receiving a first communication signal; for the nth driving circuit in the third to Nth driving circuits, the first input end of the nth driving circuit is connected with the second input end of the (n-1) th driving circuit through the standby end of the (n-1) th driving circuit to form a first standby communication channel corresponding to the nth driving circuit; the first standby communication channel is used for providing a first standby communication signal for the first input end of the nth driving circuit under the condition that the second input end of the nth driving circuit is abnormal in communication; the problem of interruption of the whole communication link caused by communication abnormity of a certain driving circuit in the prior art is avoided, it is ensured that the communication link can still be kept connected when local problems occur, and the reliability of the driving circuit group is effectively improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a driving circuit assembly, an LED string, and an LED display system. Background Technology

[0002] LED light strip screens, as a type of LED display, are widely used in outdoor large-area displays and other scenarios. These screens are mainly composed of multiple LED light string units, each corresponding to a display area of ​​the LED screen. LED light string units are usually cascaded into groups to expand the display area. Each LED light string unit generally consists of an LED driver circuit and several LEDs. The LED driver circuit, in addition to driving the LEDs within its own unit, also handles communication and transmission between units within the same group.

[0003] However, in the existing technology, if a certain driving circuit malfunctions, it will cause the entire communication link to be interrupted, which in turn will affect the operation of subsequent driving circuits. Utility Model Content

[0004] Therefore, it is necessary to provide a driving circuit assembly, an LED string, and an LED display system to address the aforementioned technical problems.

[0005] In a first aspect, this application provides a driving circuit group, which includes N driving circuits; the driving circuit is provided with a first input terminal, a second input terminal, an output terminal and a spare terminal;

[0006] The first input terminal of the first driving circuit is used to receive the first communication signal; the output terminal of the first driving circuit is connected to the second input terminal of the second driving circuit, and for each of the second to Nth driving circuits, the output terminal of each driving circuit is connected to the second input terminal of the next stage driving circuit to form a first serial channel;

[0007] For the nth driving circuit among the 3rd to the Nth driving circuits, the first input terminal of the nth driving circuit is connected to the second input terminal of the (n-1)th driving circuit via the spare terminal of the (n-1)th driving circuit to form the first spare communication channel corresponding to the nth driving circuit; 3≤n≤N;

[0008] The first backup communication channel is used to provide a first backup communication signal to the first input terminal of the nth driving circuit in the event of a communication anomaly at the second input terminal of the nth driving circuit.

[0009] In one of the embodiments, the N driving circuits are arranged in a row; the communication mode of the driving circuit group comprises a first communication mode and a second communication mode;

[0010] The first communication mode refers to that the N driving circuits communicate in a first direction;

[0011] The second communication mode refers to that the N driving circuits communicate in a second direction;

[0012] The first direction and the second direction are opposite.

[0013] In one of the embodiments, when the communication mode of the driving circuit group is the first communication mode, the order of the N driving circuits is sequentially increased along the first direction;

[0014] When the communication mode of the driving circuit group is the second communication mode, the order of the N driving circuits is sequentially increased along the second direction.

[0015] In one of the embodiments, the driving circuit is further provided with a first power supply end and a second power supply end;

[0016] The first power supply end of the first driving circuit is used for connecting with a first external power supply end, and the second power supply end of the Nth driving circuit is used for connecting with a second external power supply end;

[0017] For each of the first to N-1th driving circuits, the second power supply end of each driving circuit is connected in series with the first power supply end of the next stage driving circuit.

[0018] In one of the embodiments, the driving circuit group is provided with a first signal input end, a second signal input end and a signal output end;

[0019] The first signal input end of the driving circuit group is the first input end of the first driving circuit;

[0020] The second signal input end of the driving circuit group is the second input end of the first driving circuit;

[0021] The signal output end of the driving circuit group is the output end of the Nth driving circuit.

[0022] In a second aspect, the application further provides an LED lamp string, which comprises M driving circuit groups according to any one of the embodiments of the first aspect; the driving circuit group is provided with a first signal input end, a second signal input end and a signal output end;

[0023] For each of the M driving circuit groups, the output end of each of the driving circuit groups is connected with the second signal input end of the next-stage driving circuit group, to form a second serial channel;

[0024] The first signal input end of the first driving circuit group is configured to receive a first communication signal; and the second signal input end of the first driving circuit group is configured to receive a second backup communication signal in a case where there is a communication abnormality at the first signal input end of the first driving circuit group.

[0025] The first signal input end of the second driving circuit group is configured to receive the second backup communication signal in a case where there is a communication abnormality at the second signal input end of the second driving circuit group.

[0026] For the mth driving circuit group of the third to Mth driving circuit groups, the first signal input end of the mth driving circuit group is connected with the output end of the m-2th driving circuit group, to form a second backup communication channel corresponding to the mth driving circuit group; 3≤m≤M.

[0027] The second backup communication channel is configured to provide a third backup communication signal to the first signal input end of the mth driving circuit group in a case where there is a communication abnormality at the second signal input end of the mth driving circuit group.

[0028] In one of the embodiments, the M driving circuit groups include M / 2 first driving circuit groups and M / 2 second driving circuit groups.

[0029] Alternatively, the M driving circuit groups include M first driving circuit groups.

[0030] Alternatively, the M driving circuit groups include M second driving circuit groups.

[0031] The communication mode of the first driving circuit group is different from the communication mode of the second driving circuit group.

[0032] In one of the embodiments, in the case where the M driving circuit groups include M / 2 first driving circuit groups and M / 2 second driving circuit groups, the LED lamp string is distributed in 2 rows and M / 2 columns.

[0033] The M / 2 first driving circuit groups form one row; and the M / 2 second driving circuit groups form one row.

[0034] In one of the embodiments, in the case where the M driving circuit groups include M first driving circuit groups or the M driving circuit groups include M second driving circuit groups, the LED lamp string is distributed in 1 row and M columns.

[0035] In one of the embodiments, the driving circuit group is further provided with a first power supply end and a second power supply end;

[0036] The first power supply ends of the M driving circuit groups are connected in parallel to a first external power supply end;

[0037] The second power supply ends of the M driving circuit groups are connected in parallel to a second external power supply end.

[0038] In a third aspect, the application further provides an LED display system, which comprises a master control end and at least one LED lamp string according to any one of the embodiments of the second aspect;

[0039] The master control end is in communication connection with the LED lamp string.

[0040] The driving circuit group, the LED lamp string and the LED display system, the driving circuit group comprises N driving circuits; wherein the driving circuit is provided with a first input end, a second input end, an output end and a standby end; the first input end of the first driving circuit is used for receiving a first communication signal; the output end of the first driving circuit is connected with the second input end of the second driving circuit, and for each of the second to Nth driving circuits, the output end of each driving circuit is connected with the second input end of the next stage driving circuit, to form a first serial communication channel; the first serial communication channel is taken as a main communication link, and based on the first serial communication channel, the first communication signal can be transmitted from the first driving circuit to each subsequent driving circuit; for the nth driving circuit in the third to Nth driving circuit, the first input end of the nth driving circuit is connected with the second input end of the n-1th driving circuit through the standby end of the n-1th driving circuit, to form a first standby communication channel corresponding to the nth driving circuit; the first standby communication channel is used for providing a first standby communication signal to the first input end of the nth driving circuit in the case that there is a communication abnormality at the second input end of the nth driving circuit; based on the first standby communication channel, when there is a communication abnormality at the second input end of the corresponding driving circuit, the first standby communication channel can be switched to, to ensure the normal communication function of the current driving circuit and the subsequent driving circuit, avoiding the problem that in the prior art, once there is a communication abnormality of a driving circuit, the whole communication link is interrupted, ensuring that the communication link can still be connected when there is a problem in a local part, and further ensuring the normal work of the subsequent driving circuit, reducing the risk of performance decline of the whole driving circuit group due to the communication abnormality of a single driving circuit, and effectively improving the reliability of the driving circuit group. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to make the technical solutions in the embodiments of the present application or the related art clearer, the accompanying drawings needed in the description of the embodiments of the present application or the related art will be briefly introduced. Obviously, the accompanying drawings in the following description only only some embodiments of the present application, and for those skilled in the art, other related drawings can be obtained on the basis of these drawings without creative labor.

[0042] Figure 1 Structure diagram of a driving circuit group in an embodiment;

[0043] Figure 2 Structure diagram of a driving circuit group in another embodiment;

[0044] Figure 3 Structure diagram of an LED lamp string in an embodiment;

[0045] Figure 4 Structure diagram of an LED lamp string in a specific embodiment.

[0046] Explanation of reference signs:

[0047] 100, driving circuit group; 110, driving circuit. DETAILED DESCRIPTION

[0048] In order to make the technical solutions in the embodiments of the present application or the related art clearer, the accompanying drawings needed in the description of the embodiments of the present application or the related art will be briefly introduced. Obviously, the accompanying drawings in the following description only only some embodiments of the present application, and for those skilled in the art, other related drawings can be obtained on the basis of these drawings without creative labor.

[0049] In an embodiment, as shown in Figure 1 , Figure 1 Structure diagram of a driving circuit group in an embodiment; the driving circuit group 100 includes N driving circuits 110; the driving circuit 110 is provided with a first input end A1, a second input end A3, an output end B2 and a standby end C4;

[0050] The first input end A1 of the first driving circuit 110 is used for receiving a first communication signal; the output end B2 of the first driving circuit 110 is connected with the second input end A3 of the second driving circuit 110, and for each of the second to Nth driving circuits 110, the output end B2 of each driving circuit 110 is connected with the second input end A3 of the next stage driving circuit 110, to form a first serial channel;

[0051] For the nth drive circuit 110 in the 3th to Nth drive circuit 110, the first input end A1 of the nth drive circuit 110 is connected with the second input end A3 of the n-1th drive circuit 110 via the standby end C4 of the n-1th drive circuit 110, to form a first standby communication channel corresponding to the nth drive circuit 110; 3≤n≤N; n is a natural number;

[0052] The first standby communication channel is used to provide a first standby communication signal to the first input end A1 of the nth drive circuit 110 in the case that there is a communication abnormality at the second input end A3 of the nth drive circuit 110.

[0053] The drive circuit 110 is used to be connected with one or more LED lamp beads (not shown in the figure), and the drive circuit 110 is used to realize driving control of the LED lamp beads according to the first communication signal. The first communication signal is generated by the master control end according to actual display control requirements, which is not limited here.

[0054] It should be noted that the second input end A3 of the drive circuit 110 is in communication connection with the standby end C4, which lays the foundation for forming the first standby communication channel.

[0055] The drive circuit 110 is provided with at least four communication ports, and the four communication ports all have bidirectional communication function and can automatically identify the signal transmission direction in the port. Based on this, the four communication ports are defined as the first input end A1, the second input end A3, the output end B2 and the standby end C4 according to the actual communication function of the communication port of the drive circuit 110.

[0056] The first serial channel refers to the main communication link corresponding to the drive circuit group 100, which is used to realize serial transmission of signals between the drive circuits 110. For example, in the case that the drive circuit group 100 communicates normally, after the first input end A1 of the 1th drive circuit 110 receives the first communication signal, the first communication signal is transmitted to the second input end A3 of the 2th drive circuit 110 through the output end B2 of the 1th drive circuit 110, and then the first communication signal is transmitted from the output end B2 of the 2th drive circuit 110 to the second input end A3 of the 3th drive circuit 110, and so on, until the first communication signal is transmitted to the second input end A3 of the Nth drive circuit 110, to form the first serial channel, i.e. the signal transmission link from the 1th to the Nth drive circuit 110.

[0057] It should be noted that after the first communication signal is transmitted to each drive circuit 110, each drive circuit 110 will automatically obtain the corresponding communication signal from the first communication signal. The specific implementation process can refer to the prior art, which is not described here.

[0058] It should be noted that the communication abnormality of the second input end A3 of the drive circuit 110 does not mean that the second input end A3 itself is abnormal. The communication abnormality of the second input end A3 of the drive circuit 110 can be caused by various factors, which are not limited herein, for example, output failure of the previous stage drive circuit 110, line breakage, poor contact, etc., thereby causing the second input end A3 of the drive circuit 110 to fail to correctly receive the expected communication signal through the first serial channel.

[0059] It can be understood that since the second input end A3 of each drive circuit 110 is in communication connection with the standby end C4, in the case that the second input end A3 of the nth drive circuit 110 has a communication abnormality (i.e. fails to correctly receive the first communication signal through the first serial channel), the first standby communication signal can be provided to the first input end A1 of the nth drive circuit 110 through the corresponding first standby communication channel, i.e. the first standby communication signal is provided to the first input end A1 of the nth drive circuit 110 based on the second input end A3 of the (n-1)th drive circuit 110; wherein 3≤n≤N; n is a natural number.

[0060] The first standby communication signal is derived from the first communication signal received by the second input end A3 of the previous stage drive circuit 110. Based on this, even if the second input end A3 of the current stage drive circuit 110 has a communication abnormality, the corresponding communication signal, i.e. the first standby communication signal, can still be received from the first input end A1, ensuring the continuity of data transmission and effectively avoiding the risk of interruption of the entire communication link.

[0061] It can be understood that in the case that the second input end A3 of the drive circuit 110 has a communication abnormality, the drive circuit 110 will automatically switch to the first standby communication channel to receive the first standby communication signal, which can quickly and effectively restore communication, minimize the communication interruption time, and effectively improve the response speed of the drive circuit 110 to the communication abnormality.

[0062] Exemplarily, in the case that the second input end A3 of the drive circuit 110 has a communication abnormality, the drive circuit 110 will automatically switch to the first standby communication channel to receive the first standby communication signal, which can quickly and effectively restore communication, minimize the communication interruption time, and effectively improve the response speed of the drive circuit 110 to the communication abnormality. Figure 1For example, the driving circuit group 100 includes N driving circuits 110, respectively driving circuit 1 to driving circuit N; the driving circuit 110 is provided with a first input end A1, a second input end A3, an output end B2 and a standby end C4; the first input end A1 of the driving circuit 1 is used for receiving a first communication signal; the output end B2 of the driving circuit 1 is connected with the second input end A3 of the driving circuit 2; for the driving circuit 2 to the driving circuit N, the output end B2 of the driving circuit 2 is connected with the second input end A3 of the next stage driving circuit 3, the output end B2 of the driving circuit 3 is connected with the second input end A3 of the next stage driving circuit 4 (not shown in the figure), and the like is sequentially connected to form a first serial communication channel; the first input end A1 of the driving circuit 3 is connected with the second input end A3 of the driving circuit 2 through the standby end C4 of the driving circuit 2, and a first standby communication channel corresponding to the driving circuit 3 is formed; sequentially, the first standby communication channel corresponding to the driving circuit 4 to the driving circuit N is obtained according to the above implementation process, which will not be described here.

[0063] Further, taking the driving circuit 3 as an example, in the case that there is a communication abnormality (i.e. the first communication signal cannot be correctly received through the first serial communication channel) at the second input end A3 of the driving circuit 3, the first standby communication signal is provided to the first input end A1 of the driving circuit 3 through the first standby communication channel corresponding to the driving circuit 3, i.e. the first standby communication signal is provided to the first input end A1 of the driving circuit 3 through the second input end A3 of the driving circuit 2, to ensure that the driving circuit 3 continues to communicate based on the first standby communication signal.

[0064] In this embodiment, based on the first standby communication channel, when the second input end A3 of the corresponding driving circuit 110 has a communication abnormality, the first standby communication channel can be automatically switched to, to ensure the normal communication function of the current driving circuit 110 and the subsequent driving circuit 110, avoiding the problem that the whole communication link is interrupted once a communication abnormality occurs in a driving circuit in the prior art, ensuring that the communication link can still be connected when a problem occurs locally, and further ensuring the normal work of the subsequent driving circuit 110, reducing the risk of performance degradation of the whole driving circuit group 100 due to the communication abnormality of a single driving circuit 110, and effectively improving the reliability of the driving circuit group 100.

[0065] In one embodiment, the N driving circuits 110 are distributed in a row; the communication mode of the driving circuit group 100 includes a first communication mode and a second communication mode;

[0066] The first communication mode refers to that the N driving circuits 110 communicate in a first direction;

[0067] The second communication mode refers to that the N driving circuits 110 communicate in a second direction;

[0068] The first direction and the second direction are opposite. For example, based on the N driving circuits 110 arranged in a row, if the first direction is from left to right, the second direction is from right to left; if the first direction is from right to left, the second direction is from left to right. The first direction and the second direction need to be set according to actual needs, which are not limited here. It can be understood that the left and right described in the above embodiment refer to the left and right corresponding to the row direction.

[0069] Further, in the case where the communication mode of the driving circuit group 100 is the first communication mode, the order of the N driving circuits 110 is sequentially increased along the first direction;

[0070] In the case where the communication mode of the driving circuit group 100 is the second communication mode, the order of the N driving circuits 110 is sequentially increased along the second direction.

[0071] The order of the driving circuit 110 refers to the physical order corresponding to the driving circuit 110, for example, the first, the second, and the like.

[0072] In an exemplary embodiment, the driving circuit group 100 is configured to have a first communication mode and a second communication mode. Figure 1 and Figure 2 For example, it is assumed that the first direction is from left to right and the second direction is from right to left. Figure 1 In the case where the communication mode of the driving circuit group 100 is the first communication mode, the N driving circuits 110 communicate in the first direction, i.e., from left to right, and the order of the N driving circuits 110 is sequentially increased along the first direction, i.e., from left to right. Figure 2 In the case where the communication mode of the driving circuit group 100 is the second communication mode, the N driving circuits 110 communicate in the second direction, i.e., from right to left, and the order of the N driving circuits 110 is sequentially increased along the second direction, i.e., from right to left.

[0073] It should be noted that the communication mode of the driving circuit group 100 needs to be set according to actual communication needs, which is not limited here.

[0074] In the embodiment, based on the first communication mode and the second communication mode, the driving circuit group 100 can better cope with complex communication needs, and the reliability and flexibility of the driving circuit group 100 can be significantly improved, so that the driving circuit group 100 can maintain efficient and stable communication in various situations.

[0075] In an embodiment, as shown in Figure 1 and Figure 2 The driving circuit 110 is also provided with a first power supply end V1 and a second power supply end V2.

[0076] The first power supply terminal V1 of the first driving circuit 110 is used to connect to the first external power supply terminal, and the second power supply terminal V2 of the Nth driving circuit 110 is used to connect to the second external power supply terminal.

[0077] For each of the first to N-1 driving circuits 110, the second power supply terminal V2 of each driving circuit 110 is connected in series with the first power supply terminal V1 of the next stage driving circuit 110.

[0078] The voltages of the first and second external power supply terminals need to be set according to actual needs, and are not specifically limited here. For example, when the voltage of the first external power supply terminal is greater than the voltage of the second external power supply terminal, the first external power supply terminal is at a high level and the second external power supply terminal is at a low level; when the voltage of the first external power supply terminal is less than the voltage of the second external power supply terminal, the second external power supply terminal is at a high level and the first external power supply terminal is at a low level. The high level can be achieved, but is not limited to, by connecting a DC power supply; the low level can be achieved, but is not limited to, by grounding.

[0079] In this embodiment, based on the first external power supply terminal and the second external power supply terminal, a corresponding power supply voltage can be provided to each drive circuit 110 in the drive circuit group 100, ensuring that each drive circuit 110 can work normally, laying the foundation for improving the reliability of the drive circuit 110.

[0080] Furthermore, in one embodiment, the drive circuit group 100 is provided with a first signal input terminal, a second signal input terminal, and a signal output terminal; the first signal input terminal of the drive circuit group 100 is the first input terminal A1 of the first drive circuit 110; the second signal input terminal of the drive circuit group 100 is the second input terminal A3 of the first drive circuit 110; and the signal output terminal of the drive circuit group 100 is the output terminal B2 of the Nth drive circuit 110. Based on this, the ports of the drive circuit group 100 are unified, so as to simplify the expansion process of the drive circuit group 100 and improve the flexibility of the expansion of the drive circuit group 100.

[0081] In one embodiment, such as Figure 3 As shown, Figure 3 This is a schematic diagram of the structure of an LED string in one embodiment; the LED string includes M driving circuit groups 100 described in the above embodiment; each driving circuit group 100 is provided with a first signal input terminal IN1, a second signal input terminal IN2 and a signal output terminal OUT; M≥3, M is a natural number;

[0082] For each of the M drive circuit groups 100, the output terminal OUT of each drive circuit group 100 is connected to the second signal input terminal IN2 of the next stage drive circuit group 100 to form a second serial channel.

[0083] The first signal input end IN1 of the first driving circuit group 100 is configured to receive the first communication signal D1; the second signal input end IN2 of the first driving circuit group 100 is configured to receive the second backup communication signal D2 in the case that the first signal input end IN1 of the first driving circuit group 100 has communication abnormality;

[0084] The first signal input end IN1 of the second driving circuit group 100 is configured to receive the second backup communication signal D2 in the case that the second signal input end IN2 of the second driving circuit group 100 has communication abnormality;

[0085] For the mth driving circuit group 100 in the third to Mth driving circuit groups 100, the first signal input end IN1 of the mth driving circuit group 100 is connected with the output end OUT of the m-2th driving circuit group 100, thereby forming a second backup communication channel corresponding to the mth driving circuit group 100; 3≤m≤M; m is a natural number.

[0086] The second backup communication channel is configured to provide the third backup communication signal to the first signal input end IN1 of the mth driving circuit group 100 in the case that the second signal input end IN2 of the mth driving circuit group 100 has communication abnormality.

[0087] The first communication signal D1 and the second backup communication signal D2 can be the same communication signal, which is not specifically limited herein.

[0088] The second serial channel refers to a main communication link corresponding to the LED lamp string, and is configured to realize serial transmission of signals between the driving circuit groups 100. For example, in the case that the LED lamp string has normal communication, the first signal input end IN1 of the first driving circuit group 100 receives the first communication signal D1; the first communication signal D1 is transmitted to the second signal input end IN2 of the second driving circuit group 100 through the output end OUT of the first driving circuit group 100, and then the first communication signal D1 is transmitted from the output end OUT of the second driving circuit group 100 to the second signal input end IN2 of the third driving circuit group 100, and the like, thereby forming the second serial channel, i.e., the signal transmission link from the first to Mth driving circuit groups 100.

[0089] It should be noted that communication anomalies at the first signal input terminal IN1 of the first drive circuit group 100, the second signal input terminal IN2 of the second drive circuit group 100, and the second signal input terminal IN2 of the m-th drive circuit group 100 may be caused by a variety of factors, which are not specifically limited here. For example, taking the second drive circuit group 100 as an example, the reason for the communication anomaly at the second signal input terminal IN2 of the second drive circuit group 100 may be: output failure of the first drive circuit group 100, line breakage, poor contact, etc., which causes the second drive circuit group 100 to be unable to correctly receive the expected communication signal through the second serial channel.

[0090] The third backup communication signal originates from the first communication signal D1 output by the output terminal OUT of the first two-stage drive circuit group 100, or from the first communication signal D1 received by the second signal input terminal IN2 of the first-stage drive circuit group 100. Based on the third backup communication signal, it is ensured that even if a communication anomaly occurs at the second signal input terminal IN2 of the first-stage drive circuit group 100, the corresponding communication signal, i.e., the third backup communication signal, can still be received from the first signal input terminal IN1, ensuring the continuity of data transmission and effectively avoiding the risk of interruption of the entire communication link.

[0091] In one exemplary embodiment, the M driving circuit groups 100 include M / 2 first driving circuit groups and M / 2 second driving circuit groups; or, the M driving circuit groups include M first driving circuit groups; or, the M driving circuit groups include M second driving circuit groups; wherein the communication modes of the first driving circuit groups and the second driving circuit groups are different. The selection of the M driving circuit groups 100 needs to be based on the actual requirements of the LED string, and no specific limitation is made here.

[0092] For example, with Figure 3 Taking an example, assume the first communication mode is that N drive circuits (not shown in the figure) within the drive circuit group 100 communicate from left to right; the second communication mode is that N drive circuits (not shown in the figure) within the drive circuit group 100 communicate from right to left; assume the M drive circuit groups 100 include M / 2 first drive circuit groups and M / 2 second drive circuit groups, the M / 2 first drive circuit groups are drive circuit group 1 to drive circuit group M / 2 respectively; the M / 2 second drive circuit groups are drive circuit group M / 2+1 to drive circuit group M respectively; wherein, the communication mode of the first drive circuit group is the first communication mode, and the communication mode of the second drive circuit group is the second communication mode.

[0093] Further, for the M driving circuit groups 100, the output end OUT of the driving circuit group 1 is connected with the second signal input end IN2 of the driving circuit group 2, the output end OUT of the driving circuit group 2 is connected with the second signal input end IN2 of the driving circuit group 3, and the like, to form a second serial communication channel. The first signal input end IN1 of the driving circuit group 1 is used to receive the first communication signal D1; the second signal input end IN2 of the driving circuit group 1 is used to receive the second backup communication signal D2 in the case that there is a communication abnormality in the first signal input end IN1 of the driving circuit group 1; the first signal input end IN1 of the driving circuit group 2 is used to receive the second backup communication signal D2 in the case that there is a communication abnormality in the second signal input end IN2 of the driving circuit group 2; the first signal input end IN1 of the driving circuit group 3 is connected with the output end OUT of the driving circuit group 1 to form a second backup communication channel corresponding to the driving circuit group 3, and the like, to sequentially determine the second backup communication channels corresponding to the driving circuit groups 4 to M according to the above implementation method.

[0094] Further, taking the driving circuit group 3 as an example, in the case that there is a communication abnormality in the second signal input end IN2 of the driving circuit group 3, the third backup communication signal is provided to the first signal input end IN1 of the driving circuit group 3 through the second backup communication channel corresponding to the driving circuit group 3, i.e. the third backup communication signal is provided to the first signal input end IN1 of the driving circuit group 3 through the output end OUT of the driving circuit group 1, to ensure that the driving circuit group 3 continues to communicate based on the third backup communication signal.

[0095] In the embodiment, in the case that the first signal input end IN1 of the first driving circuit group 100 has a communication abnormality, the second standby communication signal D2 is received by the second signal input end IN2 of the first driving circuit group 100, so that the first driving circuit group 100 can recover the communication function based on the second standby communication signal D2; in the case that the second signal input end IN2 of the second driving circuit group 100 has a communication abnormality, the second standby communication signal D2 is received by the first signal input end IN1 of the second driving circuit group 100, so that the second driving circuit group 100 can recover the communication function based on the second standby communication signal D2; based on the second standby communication channel, when the second signal input end IN2 of the corresponding driving circuit group 100 has a communication abnormality, the second standby communication channel can be automatically switched to, so as to ensure the normal communication function of the current driving circuit group 100 and the subsequent driving circuit group 100; based on this, the problem that the communication link is interrupted once a certain driving circuit group has a communication abnormality in the prior art is avoided, the communication link can still be kept connected when a local problem occurs, and then the normal work of the subsequent driving circuit group 100 is ensured, the risk that the overall LED lamp string performance is reduced due to the communication abnormality of a single driving circuit group 100 is reduced, and the reliability of the LED lamp string is effectively improved.

[0096] In one embodiment, in the case that the M driving circuit groups 100 include M / 2 first driving circuit groups and M / 2 second driving circuit groups, the LED lamp string is distributed in 2 rows and M / 2 columns.

[0097] The M / 2 first driving circuit groups constitute a row; and the M / 2 second driving circuit groups constitute a row.

[0098] In the case that the M driving circuit groups 100 include M first driving circuit groups, or the M driving circuit groups 100 include M second driving circuit groups, the LED lamp string is distributed in 1 row and M columns.

[0099] Exemplarily, in the case that the M driving circuit groups 100 include M first driving circuit groups, the LED lamp string is distributed in 1 row and M columns. Figure 3For example, it is assumed that the first communication mode is that the N driving circuit groups 100 (not shown in the figure) communicate in the left-to-right direction, the second communication mode is that the N driving circuit groups 100 (not shown in the figure) communicate in the right-to-left direction, the LED lamp string includes M / 2 first driving circuit groups and M / 2 second driving circuit groups, the communication mode of the first driving circuit group is the first communication mode, and the communication mode of the second driving circuit group is the second communication mode. The M / 2 first driving circuit groups are driving circuit group 1 to driving circuit group M / 2, respectively, and the M / 2 second driving circuit groups are driving circuit group M / 2+1 to driving circuit group M, respectively. The M / 2 first driving circuit groups form a first row, and the M / 2 second driving circuit groups form a second row. Further, according to the connection mode described in the above embodiment, the LED lamp string is formed in a 2-row and M / 2-column distribution.

[0100] It should be noted that when the M driving circuit groups 100 include M first driving circuit groups or the M driving circuit groups 100 include M second driving circuit groups, the specific structure and connection mode of the LED lamp string are the same as the implementation principle corresponding to the specific structure and connection mode of the LED lamp string when the M driving circuit groups 100 include M / 2 first driving circuit groups and M / 2 second driving circuit groups, which will not be described here.

[0101] In this embodiment, the layout of the LED lamp string can be flexibly adjusted according to different application scenarios and requirements, improving the flexibility and adaptability of the LED lamp string and meeting diversified application requirements.

[0102] In one embodiment, referring to Figure 3 The driving circuit group 100 further includes a first power supply end VIN1 and a second power supply end VIN2.

[0103] The first power supply ends VIN1 of the M driving circuit groups 100 are connected in parallel to a first external power supply end.

[0104] The second power supply ends VIN2 of the M driving circuit groups 100 are connected in parallel to a second external power supply end.

[0105] The voltage of the first external power supply end is different from the voltage of the second external power supply end. For example, if the first external power supply end is a direct current power supply VDD, the second external power supply end is ground GND; if the second external power supply end is a direct current power supply VDD, the first external power supply end is ground GND.

[0106] For example, it is assumed that the second external power supply end is a direct current power supply VDD and the first external power supply end is ground GND, referring to Figure 3The first power supply ends VIN1 of the M driving circuit groups 100 are connected in parallel to each other to a first external power supply end, i.e., GND; the second power supply ends VIN2 of the M driving circuit groups 100 are connected in parallel to each other to a second external power supply end, i.e., VDD, based on which a corresponding power supply voltage is provided for each driving circuit group 100.

[0107] In this embodiment, based on the first external power supply end and the second external power supply end, a stable working voltage can be provided for the LED lamp string, and the reliability of the power supply of the LED lamp string is ensured.

[0108] In one specific embodiment, as shown in Figure 4 , Figure 4 is a structural schematic diagram of an LED lamp string in one specific embodiment; the LED lamp string includes 4 driving circuit groups 100, and the LED lamp string is distributed in 2 rows and 2 columns, each driving circuit group 100 includes 4 driving circuits 110; wherein the communication direction of the first row driving circuit group 100 is from left to right, and the communication direction of the second row driving circuit group 100 is from right to left; the connection mode between the driving circuits 110 in the LED lamp string in this embodiment and the connection mode between the driving circuit groups 100 are the same as the connection mode principles recorded in the above embodiments, and will not be described here.

[0109] It can be understood that the present LED lamp string can effectively avoid the problem of interruption of the entire communication link caused by communication abnormalities of part of the driving circuits 110 or part of the driving circuit groups 100, and effectively improve the reliability of the LED lamp string by setting different backup communication channels between the driving circuits 110 and between the driving circuit groups 100.

[0110] In one embodiment, an LED display system is provided, and the LED display system includes a master control end and at least one LED lamp string recorded in any one of the above embodiments;

[0111] The master control end is in communication connection with the LED lamp string.

[0112] The master control end is configured to send a first communication signal and a second backup communication signal to the LED lamp string. The master control end can be, but is not limited to, a control chip, a control device, etc., and will not be specifically limited here.

[0113] The LED display system in this embodiment can effectively avoid the problem of interruption of the entire communication link caused by communication abnormalities of a certain driving circuit in the prior art, ensures that the communication link can still be connected when a local problem occurs, and further ensures the normal work of the subsequent driving circuit, reduces the risk of performance degradation of the overall LED display system caused by communication abnormalities of a single driving circuit, and effectively improves the reliability of the LED display system.

[0114] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0115] It is to be understood that the terms "first", "second", and the like, used herein do not connote any hierarchy or order, but are used to distinguish one element from another. For example, a first element can be termed a second element, and, similarly, a second element can be termed a first element, without departing from the scope of the present application.

[0116] It is to be understood that, in the following embodiments, "connected" can be "electrically connected" or "communicatively connected", if the circuits, modules, units, etc. to be connected have the transfer of electrical signals or data between each other.

[0117] It is to be understood that "at least one" means one or more, "multiple" means two or more. "At least part of an element" means part or all of the element.

[0118] As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly indicates otherwise. It is also to be understood that the term "including" or "comprising" or "having" or the like means the presence of the stated features, integers, steps, operations, components, parts, or combinations thereof, but does not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

[0119] In the description of the specification, the description of the terms "some embodiments", "other embodiments", and the like, means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are contained in at least one embodiment or example of the application. The illustrative description of the above terms in the specification does not necessarily refer to the same embodiment or example.

[0120] The technical features of the above-described embodiments can be combined in any manner, and in order to make the description brief, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0121] The above-described embodiments are merely illustrative of several embodiments of the present application, which are described in more detail and in a specific manner, but should not be construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A drive circuit set, characterized by, The driving circuit group comprises N driving circuits; the driving circuit is provided with a first input end, a second input end, an output end and a standby end; The first input end of the first driving circuit is used for receiving a first communication signal; the output end of the first driving circuit is connected with the second input end of the second driving circuit; for each of the second to Nth driving circuits, the output end of each driving circuit is connected with the second input end of the next stage driving circuit, thereby forming a first serial communication channel; For the nth driving circuit in the third to Nth driving circuits, the first input end of the nth driving circuit is connected with the second input end of the n-1th driving circuit through the standby end of the n-1th driving circuit, thereby forming a first standby communication channel corresponding to the nth driving circuit; 3≤n≤N; The first standby communication channel is used for providing a first standby communication signal to the first input end of the nth driving circuit in the case that there is a communication abnormality at the second input end of the nth driving circuit.

2. The drive circuit set according to claim 1, characterized in that, The N driving circuits are distributed in a row; the communication mode of the driving circuit group comprises a first communication mode and a second communication mode; The first communication mode refers to that the N driving circuits communicate in a first direction; The second communication mode refers to that the N driving circuits communicate in a second direction; The first direction and the second direction are opposite.

3. The driving circuit group according to claim 2, wherein In the case that the communication mode of the driving circuit group is the first communication mode, the order of the N driving circuits is sequentially increased along the first direction; In the case that the communication mode of the driving circuit group is the second communication mode, the order of the N driving circuits is sequentially increased along the second direction.

4. The drive circuit set of claim 1, wherein The driving circuit is further provided with a first power supply end and a second power supply end; The first power supply end of the first driving circuit is used for being connected with a first external power supply end, and the second power supply end of the Nth driving circuit is used for being connected with a second external power supply end; For each of the first to N-1th driving circuits, the second power supply end of each driving circuit is connected in series with the first power supply end of the next stage driving circuit.

5. The drive circuit set of claim 1, wherein The driving circuit group is provided with a first signal input end, a second signal input end and a signal output end; The first signal input end of the driving circuit group is the first input end of the first driving circuit; The second signal input end of the driving circuit group is the second input end of the first driving circuit; The signal output end of the driving circuit group is the output end of the Nth driving circuit.

6. An LED light string, characterized in that The LED lamp string comprises M driving circuit groups according to any one of claims 1 to 5; the driving circuit group is provided with a first signal input end, a second signal input end and a signal output end; For each of the M driving circuit groups, the output end of each driving circuit group is connected with the second signal input end of the next stage driving circuit group, thereby forming a second serial communication channel; The first signal input end of the first driving circuit group is configured to receive a first communication signal; and the second signal input end of the first driving circuit group is configured to receive a second backup communication signal in a case where a communication abnormality exists at the first signal input end of the first driving circuit group; The first signal input end of the second driving circuit group is configured to receive the second backup communication signal in a case where a communication abnormality exists at the second signal input end of the second driving circuit group; For the mth driving circuit group in the third to Mth driving circuit groups, the first signal input end of the mth driving circuit group is connected with the output end of the m-2th driving circuit group to form a second backup communication channel corresponding to the mth driving circuit group, where 3≤m≤M; The second backup communication channel is configured to provide a third backup communication signal to the first signal input end of the mth driving circuit group in a case where a communication abnormality exists at the second signal input end of the mth driving circuit group.

7. The LED lamp string according to claim 6, wherein The M driving circuit groups include M / 2 first driving circuit groups and M / 2 second driving circuit groups; Or, the M driving circuit groups include M first driving circuit groups; Or, the M driving circuit groups include M second driving circuit groups; The communication mode of the first driving circuit group is different from the communication mode of the second driving circuit group.

8. The LED lamp string according to claim 7, wherein In a case where the M driving circuit groups include M / 2 first driving circuit groups and M / 2 second driving circuit groups, the LED lamp string is distributed in 2 rows and M / 2 columns; The M / 2 first driving circuit groups form one row, and the M / 2 second driving circuit groups form one row.

9. The LED lamp string according to claim 7, wherein In a case where the M driving circuit groups include M first driving circuit groups, or the M driving circuit groups include M second driving circuit groups, the LED lamp string is distributed in 1 row and M columns.

10. The LED light string of claim 6, wherein, The driving circuit group is further provided with a first power supply end and a second power supply end; The first power supply ends of the M driving circuit groups are connected in parallel to a first external power supply end; The second power supply ends of the M driving circuit groups are connected in parallel to a second external power supply end.

11. An LED display system, comprising: The LED display system includes a master control end and at least one LED lamp string according to any one of claims 6 to 10; The master control end is in communication connection with the LED lamp string.

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