Address recording system and method for parallel LEDs

Abstract

The invention belongs to the technical field of LEDs, and discloses an address recording system and method for parallel LEDs, and the system comprises a control module, a power supply module and a welding module. The control module is used for sequentially sending a power supply instruction to the power supply module, sending a recording instruction to the parallel lamp string, sending a power-off instruction to the power supply module and sending a welding instruction to the welding module after receiving the starting instruction; the welding module is used for clamping the LED module and the parallel lamp string for welding when receiving the welding instruction of the control module; after welding is completed, a starting instruction is sent to the control module; the LED module is used for judging whether address data is stored or not after receiving the recording instruction; and if not, obtaining address data according to the recording instruction, and recording the address data. According to the invention, the address writing error of the LED module can be avoided, the internal algorithm redundancy of the LED module is reduced, and the production cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of LED technology, and in particular to an address recording system and method for parallel LEDs. Background Art

[0002] Parallel LEDs are widely used in the production of LED displays or light strips because the normal operation of other LEDs will not be affected by the damage of some LEDs. However, in order to achieve individual control of each LED in a parallel network, each LED must be coded with a unique address. Currently, there are two main ways to code parallel LED beads: one is before SMD soldering, and the other is after the SMD is completed, by designing an algorithm inside the LED beads.

[0003] However, if the address is burned before the LED is mounted, it is easy for the internal address sequence of the mounted LED to be wrong, such as missing sequence, disordered sequence or address duplication, resulting in low LED production efficiency; and improving the internal software of each LED lamp bead will increase the cost of a single lamp bead, which is not suitable for the application of large-scale LED products. In addition, for LED lamp beads, the internal coding program is generally only used in the production stage, resulting in algorithm redundancy in the application stage. Summary of the invention

[0004] The present application provides an address recording system and method for parallel LEDs, which can avoid LED module address writing errors, while reducing the internal algorithm redundancy of the LED module and reducing production costs.

[0005] In a first aspect, an embodiment of the present application provides an address burning system for parallel LEDs, comprising a control module, a power supply module and a welding module; the control module is used to sequentially send a welding instruction to the welding module, send a power supply instruction to the power supply module, send a burning instruction to the parallel light string, and send a power-off instruction to the power supply module after receiving a start instruction; The welding module is used to clamp the LED module and the parallel light string for welding when receiving the welding instruction from the control module; after the welding is completed, a start instruction is sent to the control module; The power supply module is used to send a working voltage signal to the parallel light string when receiving a power supply instruction; stop sending the working voltage signal when receiving a power-off instruction; the LED module is used to determine whether address data is stored after receiving a burning instruction; if not, obtain the address data according to the burning instruction and burn the address data.

[0006] Furthermore, the system also includes a signal detection module; The signal detection module is arranged on the welding module and connected to the control module; The control module is also used to send a first control instruction to the parallel light string after sending the power supply instruction; after receiving the sensing signal from the signal detection module, send a burning instruction to the parallel light string; The signal detection module is used to send a sensing signal to the control module according to the detected light signal; The LED module is also used to light up according to the first control instruction after receiving the first control instruction.

[0007] Furthermore, the control module is also used to send a second control instruction to the parallel light string after sending the burning instruction; after receiving the sensing signal from the signal detection module, send a power-off instruction to the power supply module; The LED module is also used to determine whether the control address in the second control instruction is equal to the stored address data after receiving the second control instruction; if so, light up according to the second control instruction.

[0008] Furthermore, the control module is also used to send the first control instruction to the signal detection module; The signal detection module is specifically used to obtain a signal fluctuation threshold according to a first control instruction; calculate the difference between the optical signal peak values ​​at two adjacent moments within a preset time period; wherein the preset time period is centered on the moment when the first control instruction is received; determine whether the difference is greater than or equal to the signal fluctuation threshold; if so, generate a sensing signal according to the difference and send the sensing signal to the control module.

[0009] Furthermore, the control module is also used to send the second control instruction to the signal detection module; The signal detection module is specifically used to obtain a signal fluctuation threshold according to a second control instruction; calculate the difference between the optical signal peak values ​​at two adjacent moments within a preset time period; wherein the preset time period is centered on the moment when the second control instruction is received; determine whether the difference is greater than or equal to the signal fluctuation threshold; if so, generate a sensing signal according to the difference and send the sensing signal to the control module.

[0010] Furthermore, the control module is also used to obtain the current working current value of the parallel light string and the historical working current value recorded after the first control command was sent and the induction signal was received last time when the first control command is sent and the induction signal is received; calculate the first current increment value according to the current working current value and the historical working current value; determine whether the first current increment value is within a first preset current range; if so, send a burning instruction to the parallel light string.

[0011] Furthermore, the control module is also used to obtain the working voltage signal and the historical voltage signal of the power supply module when the first current increment value is greater than the first preset current range; compare the working voltage signal and the historical voltage signal based on the wavelet transform algorithm, and if there is a sudden change in the working voltage signal, send a power supply update instruction to the power supply module, otherwise generate a light string fault prompt information; The power supply module is used to obtain an update voltage signal according to the power update instruction after receiving the power update instruction, and replace the working voltage signal with the update voltage signal.

[0012] Furthermore, the control module is also used to detect whether there is a repeated welding mark when the first current increment value is less than the first preset current range; if so, generate a light string fault prompt message; if not, generate a repeated welding mark, send a power-off instruction to the power supply module, and send a repeated welding instruction to the welding module in sequence; The welding module is also used to weld the LED module again after receiving a repeated welding instruction.

[0013] Furthermore, the control module is also used to obtain the initial current value of the parallel light string after sending the burning instruction; When the second control instruction is sent and the induction signal is received, a target current value of the parallel light string is obtained; Obtaining a second current increment value according to the initial current value and the target current value; Determining whether the second current increment value is within a first preset current range; If yes, a power-off command is sent to the power supply module; if no, a light string fault prompt message is generated.

[0014] Furthermore, the system also includes a spectrum detection module disposed on the welding module; The spectrum detection module is connected to the control module and the signal detection module respectively; the control module is also used to send a second control instruction to the spectrum detection module; receive the color rendering index of the spectrum detection module, and determine whether the color rendering index is greater than a preset color difference threshold; if so, generate a light string fault prompt message; if not, send a power-off instruction to the power supply module; The signal detection module is also used to send the sensing signal corresponding to the second control instruction to the spectrum detection module; The spectrum detection module is used to obtain the target color rendering parameters according to the second control instruction; After receiving the sensing signal, the actual color rendering parameters of the received light signal are measured; the difference between the target color rendering parameters and the actual color rendering parameters is used as the color rendering index; and the color rendering index is sent to the control module.

[0015] Furthermore, the welding module is also used to send a test voltage signal to the LED module before welding the LED module; calculate the load of the LED module according to the test voltage signal and the test current of the LED module and send it to the control module; The control module is further used to obtain an operating voltage signal of the power supply module, and determine a first preset current range corresponding to the LED module according to the operating voltage signal and the load.

[0016] Furthermore, the control module is also used to determine whether the address data in the burning instruction is equal to a preset welding threshold after sending the burning instruction; if not, after sending a power-off instruction to the power supply module, it sends a welding instruction to the welding module.

[0017] Furthermore, the power supply module adopts a Boost-Buck power supply structure; the spectrum detection module adopts a spectrophotometer.

[0018] In a second aspect, an embodiment of the present application provides an address recording method for parallel LEDs, comprising: The control module sends a welding instruction to the welding module; The welding module receives the welding instruction from the control module, clamps the LED module and the parallel light string for welding; after the welding is completed, a start instruction is sent to the control module; After receiving the start-up command, the control module sends a power supply command to the power supply module; When receiving the power supply instruction, the power supply module sends a working voltage signal to the parallel light string; The control module sends a burning instruction to the parallel light string; After receiving the burning instruction, the LED module determines whether the address data is stored; if not, it obtains the address data according to the burning instruction and burns the address data; The control module sends a power-off command to the power supply module; When the power supply module receives the power-off instruction, it stops sending the working voltage signal.

[0019] Furthermore, the method also includes: After sending the power supply instruction, the control module sends a first control instruction to the parallel light string; After receiving the first control instruction, the LED module lights up according to the first control instruction; The signal detection module sends a sensing signal to the control module according to the detected light signal; When receiving the sensing signal, the control module sends a burning instruction to the parallel light string.

[0020] Furthermore, the method also includes: After sending the burning instruction, the control module sends a second control instruction to the parallel light string; The LED module receives the second control instruction and determines whether the control address in the second control instruction is equal to the stored address data; if so, it lights up according to the second control instruction; The signal detection module sends a sensing signal to the control module according to the detected light signal; After receiving the sensing signal, the control module sends a power-off instruction to the power supply module.

[0021] Furthermore, the method also includes: The control module sends the first control instruction to the signal detection module; The signal detection module obtains a signal fluctuation threshold according to the first control instruction; calculates the difference between the optical signal peak values ​​at two adjacent moments within a preset time period; wherein the preset time period is centered on the moment when the first control instruction is received; The signal detection module determines whether the difference is greater than or equal to the signal fluctuation threshold; if so, it generates a sensing signal according to the difference and sends the sensing signal to the control module.

[0022] Furthermore, the method also includes: When the control module sends the first control instruction and receives the sensing signal, the control module obtains the current working current value of the parallel light string and the historical working current value recorded after the first control instruction was sent and the sensing signal was received last time; The current increment value is calculated according to the current working current value and the historical working current value; Determine whether the first current increment value is within a first preset current range; if so, send a burning instruction to the parallel light string.

[0023] Furthermore, the method also includes: The control module obtains the working voltage signal and the historical voltage signal of the power supply module when the current increment value is greater than the first preset current range; compares the working voltage signal and the historical voltage signal based on the wavelet transform algorithm, and sends a power supply update instruction to the power supply module if there is a sudden change in the working voltage signal; After receiving the power update instruction, the power supply module obtains an update voltage signal according to the power update instruction, and replaces the working voltage signal with the update voltage signal.

[0024] Furthermore, the method also includes: After sending the burning instruction, the control module obtains the initial current value of the parallel light string; When the second control instruction is sent and the induction signal is received, a target current value of the parallel light string is obtained; Obtaining a second current increment value according to the initial current value and the target current value; Determining whether the second current increment value is within a first preset current range; If yes, a power-off command is sent to the power supply module; if no, a light string fault prompt message is generated.

[0025] Furthermore, the method also includes: The control module sends the second control instruction to the spectrum detection module; The spectrum detection module obtains the target color rendering parameters according to the second control instruction; The signal detection module sends the sensing signal corresponding to the second control instruction to the spectrum detection module; After receiving the sensing signal, the spectrum detection module measures the actual color rendering parameters of the received light signal; the difference between the target color rendering parameters and the actual color rendering parameters is sent to the control module as a color rendering index; The control module receives the color rendering index of the spectrum detection module and determines whether the color rendering index is greater than a preset color difference threshold. If so, a light string fault prompt message is generated; if not, a power-off command is sent to the power supply module.

[0026] In summary, compared with the prior art, the technical solution provided in the embodiment of the present application has at least the following beneficial effects: An address burning system for parallel LEDs provided in an embodiment of the present application can enable the production and coding of parallel light strings to be carried out simultaneously through the cooperation of a welding module, a power supply module and a control module, that is, coding is carried out simultaneously with each welding of an LED module, and the next LED module is welded after coding is completed; the above system can not only avoid sequencing errors that may occur when writing first and then pasting, but also reduce the internal algorithm redundancy of the LED module and reduce production costs, that is, the present application only requires the LED module to perform a judgment process of address data, and there is no need to design too many processing flows as in the existing address writing method. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A structural diagram of an address recording system for parallel LEDs provided as an exemplary embodiment of the present application.

[0028] Figure 2 A structural diagram of an address recording system for parallel LEDs provided in yet another exemplary embodiment of the present application.

[0029] Figure 3 A structural diagram of an address recording system for parallel LEDs provided in accordance with another exemplary embodiment of the present application.

[0030] Figure 4 A flowchart of a method for recording addresses of parallel LEDs is provided as an exemplary embodiment of the present application.

[0031] Figure 5 A pin package diagram of a first three-wire LED module provided for an exemplary embodiment of the present application.

[0032] Figure 6 A pin package diagram of a second three-wire LED module provided by an exemplary embodiment of the present application.

[0033] Figure 7 A connection diagram of a first three-wire LED parallel light string is provided for an exemplary embodiment of the present application.

[0034] Figure 8 A second connection diagram of a three-wire LED parallel light string is provided for an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0036] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0037] See also Figure 1 The embodiment of the present application provides an address burning system for parallel LEDs, including a control module, a power supply module and a welding module; the control module is used to send a power supply instruction to the power supply module, send a burning instruction to the parallel light string, send a power-off instruction to the power supply module, and send a welding instruction to the welding module in sequence after receiving a start instruction.

[0038] The welding module is used to clamp the LED module and the parallel light string for welding when receiving the welding instruction from the control module; after the welding is completed, a start instruction is sent to the control module.

[0039] Specifically, when sending each instruction, the control module needs to wait for the last instruction to be sent, and may even wait for a preset time (such as 1ms or 2ms) after the last instruction is sent before sending the next instruction.

[0040] It is worth noting that the address data stored in the burning instruction needs to be increased one by one, that is, the address data in each burning instruction sent is obtained by adding 1 to the address data of the previous burning instruction.

[0041] Furthermore, the control module is also used to determine whether the address data in the burning instruction is equal to a preset welding threshold after sending the burning instruction; if not, after sending a power-off instruction to the power supply module, it sends a welding instruction to the welding module.

[0042] Specifically, the present application can set the length of the parallel light string, that is, the preset welding threshold. When the address data in the burning instruction sent by the control module reaches the preset welding threshold, it means that the number of LED modules in the parallel light string has reached the requirement and welding can be stopped. At this time, after the power-off instruction is sent, an end prompt message can be generated to remind the staff to reset the burning system process. After receiving the reset instruction, the control module starts working again by sending the welding instruction.

[0043] The power supply module is used to send a working voltage signal to the parallel light string when receiving a power supply instruction; stop sending the working voltage signal when receiving a power-off instruction; the LED module is used to determine whether address data is stored after receiving a burning instruction; if not, obtain the address data according to the burning instruction and burn the address data.

[0044] Specifically, the working voltage signal is a power supply signal that can start all LED modules in the parallel light string. The power supply module, like the control module, is connected to one end of the parallel light string, that is, the input end of the first LED module.

[0045] Since each LED module in the parallel light string is connected in parallel, when the control module sends a burning instruction, all LED modules including the newly welded ones can receive it, so a judgment process for the address data needs to be added inside the LED module. If the address data does not exist, it means that it is a newly welded LED module, and it can be burned according to the address data in the burning instruction.

[0046] It is understandable that many existing address burning methods are implemented through information exchange between the MCU and each LED module after the parallel light string is generated. This often requires the design of many algorithm processes in the LED module. In fact, the address burning algorithm process is basically only used in the production stage. In the formal use stage, the LED module will only be driven to light up according to the burned address. This will result in a low utilization rate of most algorithm programs in the LED module, resulting in a large amount of redundancy.

[0047] The address burning system of the present application implements the burning process in a control module, which is fixed in the address burning system and continuously serves the production and address burning of each parallel light string without generating program redundancy.

[0048] The above embodiment provides an address burning system for parallel LEDs, which can enable the production and coding of parallel light strings to be carried out simultaneously through the cooperation of the welding module, the power supply module and the control module. That is, coding is carried out simultaneously with each welding of an LED module, and the next LED module is welded after coding is completed. The above system can not only avoid sequencing errors that may occur when writing first and then pasting, but also reduce the internal algorithm redundancy of the LED module and reduce production costs. That is, the present application only requires the LED module to perform a judgment process of address data, and there is no need to design too many processing flows as in the existing address writing method.

[0049] See also Figure 2 In some embodiments, the system further includes a signal detection module.

[0050] The signal detection module is arranged on the welding module and is connected with the control module.

[0051] It can be understood that the welding module will always maintain the corresponding relationship with the newly welded LED module before receiving the welding instruction, and will clamp the new LED module only after receiving the welding instruction; therefore, the signal detection module is arranged on the welding module, so that the signal detection module can correspond to the newly welded LED module before the control module sends the welding instruction.

[0052] The control module is also used to send a first control instruction to the parallel light strings after sending the power supply instruction; and send a burning instruction to the parallel light strings after receiving the sensing signal from the signal detection module.

[0053] The signal detection module is used to send a sensing signal to the control module according to the detected light signal.

[0054] The LED module is also used to light up according to the first control instruction after receiving the first control instruction.

[0055] Among them, the first control instruction is the instruction that the parallel light string will receive and use in formal applications. The first control instruction will contain the brightness and color that the LED module needs to light up. The LED module drives the three colors of lamp beads to light up at different powers according to the first control instruction. This part uses the common mechanism of the LED module and there will be no redundancy.

[0056] It is understandable that in the production process of parallel light strings, some LED modules may have some quality risks due to production yield issues, such as damaged lamp beads and chips. In order to ensure the quality of the generated parallel light strings, the present application uses the first control instruction to light up the LED modules before address burning of the newly welded LED modules. Since the new LED modules do not store address data at this time, the role of the first control instruction at this time is to light up each LED module that receives the first control instruction, and the signal detection module only corresponds to the newly welded LED modules. Therefore, if the signal detection module generates an induction signal, it means that the newly welded LED modules can receive and execute instructions, and the next step of address burning can be performed.

[0057] The above embodiment can perform preliminary quality screening on the LED modules welded to the parallel light strings by adding a signal detection module, thereby avoiding welding of LED modules with quality problems and ensuring the production quality of the parallel light strings.

[0058] In some embodiments, the control module is further configured to send a second control instruction to the parallel light string after sending the burning instruction; and send a power-off instruction to the power supply module after receiving the sensing signal from the signal detection module.

[0059] After sending the power-off command, the control module sends the welding command to the welding module.

[0060] The LED module is also used to determine whether the control address in the second control instruction is equal to the stored address data after receiving the second control instruction; if so, light up according to the second control instruction.

[0061] Among them, the nature of the second control instruction is similar to the first control instruction, both of which are control instructions commonly used by LED modules in the formal application stage. Unlike the first control instruction, the second control instruction also includes a control address. Only when the stored address data is equal to the control address, the LED module will control the three lamp beads of different colors to light up according to the driving information corresponding to the control address in the second control instruction (including the brightness and color to be displayed, etc.).

[0062] It is understandable that in addition to situations such as damage to the lamp beads and chips, if there is a problem with the storage unit used to store address data in the LED module, it will also cause the LED module to be uncontrollable during the formal application stage. However, if there is a problem with the address storage unit, it cannot be detected under the first control instruction of the above embodiment.

[0063] Therefore, the present application sends a second control instruction after sending a burning instruction to the newly welded LED module to determine whether the address data of the LED module is correctly burned, and whether the second control instruction can be decoded and executed according to the address data; if the LED module can execute the second control instruction normally to light up, the signal detection module will generate a sensing signal, and the control module will send a power-off instruction after receiving the sensing signal to weld the next LED module.

[0064] During the specific implementation process, in order to further improve the production efficiency of parallel light strings, a preset response time limit for the sensing signal can be added to the control module. If no sensing signal is received within the preset response time limit after sending the first control instruction or the second control instruction, it means that there is a problem with the LED module, and a light string fault prompt message is generated.

[0065] The above embodiment performs a targeted lighting test on the newly welded LED module again after sending the burning instruction, which further ensures the good quality of the LED module and the production quality of the parallel light strings.

[0066] In some embodiments, the control module is further configured to send the first control instruction to the signal detection module.

[0067] The signal detection module is specifically used to obtain a signal fluctuation threshold according to a first control instruction; calculate the difference between the optical signal peak values ​​at two adjacent moments within a preset time period; wherein the preset time period is centered on the moment when the first control instruction is received; determine whether the difference is greater than or equal to the signal fluctuation threshold; if so, generate a sensing signal according to the difference and send the sensing signal to the control module.

[0068] Specifically, although the signal detection module can generate a sensing signal by detecting changes in the light signal, the detection of the light signal is greatly affected by environmental changes. Changes in light in the production workshop and shadows caused by the movement of staff will affect the signal detection module's judgment of the light signal. Therefore, this application requires the control module to send a first control instruction to the signal detection module. The signal detection module can obtain the brightness that the LED module will achieve based on the driving information in the first control instruction, thereby obtaining the signal fluctuation threshold of the light signal corresponding to the brightness; if the peak value change of the light signal exceeds the signal fluctuation threshold, it means that the change in the light signal at this time is caused by the lighting of the LED module corresponding to the signal detection module, and then a sensing signal is generated and sent to the control module, thereby avoiding erroneous feedback from the signal detection module caused by slight changes in light.

[0069] At the same time, considering that there may be a difference in the time required for the LED module and the signal detection module to decode the first control instruction, the signal detection module of the present application takes the moment of receiving the first control instruction as the center moment, and extends the preset response time limit before and after to form a preset time period. The light signal change detected within the preset time period is the control result of the first control instruction.

[0070] Similarly, the control module can also be used to send the second control instruction to the signal detection module.

[0071] The signal detection module is specifically used to obtain a signal fluctuation threshold according to a second control instruction; calculate the difference between the optical signal peak values ​​at two adjacent moments within a preset time period; wherein the preset time period is centered on the moment when the second control instruction is received; determine whether the difference is greater than or equal to the signal fluctuation threshold; if so, generate a sensing signal according to the difference and send the sensing signal to the control module.

[0072] Specifically, the signal detection module calculates the signal fluctuation threshold for the second control instruction and the first control instruction respectively, indicating that the brightness of the light string controlled by the control module and the brightness of a single LED module controlled by the control module can be different. This is suitable for situations where the calibrated working parameters of each LED module on the parallel light string are different, thereby improving the flexibility of light string production.

[0073] In some embodiments, the control module is also used to obtain the current working current value of the parallel light string and the historical working current value recorded after the last time the first control instruction was sent and the induction signal was received when the first control instruction is sent and the induction signal is received; calculate the first current increment value based on the current working current value and the historical working current value; determine whether the first current increment value is within a first preset current range; if so, send a burning instruction to the parallel light string.

[0074] Specifically, although the setting of the signal fluctuation threshold in the above embodiment can improve the detection accuracy of the signal detection module, the detection of the light signal cannot actually completely eliminate the influence of ambient light, and the stability is slightly poor; therefore, the present application further adds a current monitoring mechanism on the basis of the signal detection module, that is, after receiving the sensing signal, the control module further determines whether the new LED module is working normally through the first current increment value.

[0075] When a parallel branch is added to the parallel light string and the working voltage signal remains unchanged, the current on the bus is the sum of the currents of each parallel branch. Therefore, if the newly welded LED module is lit according to the working voltage signal, the current on the bus will change, that is, the first current increment value; the present application further determines whether the first current increment value is greater than the first preset current range, which can avoid the current fluctuations of other LED modules affecting the detection of the newly welded LED module.

[0076] In the above implementation, after the signal detection module detects the change of the light signal, the current operating current value on the parallel light string bus is further determined, which can further improve the accuracy of the quality inspection of the LED module.

[0077] In some embodiments, the control module is also used to obtain the working voltage signal and the historical voltage signal of the power supply module when the first current increment value is greater than the first preset current range; compare the working voltage signal and the historical voltage signal based on the wavelet transform algorithm, and if there is a sudden change in the working voltage signal, send a power update instruction to the power supply module, otherwise generate a light string fault prompt information.

[0078] The power supply module is used to obtain an update voltage signal according to the power update instruction after receiving the power update instruction, and replace the working voltage signal with the update voltage signal.

[0079] Wherein, being greater than the first preset current range means being less than the maximum value in the first preset current range.

[0080] Specifically, if the first current increment value is greater than the first preset current range when only one LED module is newly welded, three situations may occur: 1. The power supply of the power supply module is unstable, resulting in an increase in the operating current of the single LED module; 2. Cold soldering, short circuit, etc. occur in the parallel light string; 3. The specifications of the newly welded LED module are incorrect.

[0081] Therefore, when the control module of this application detects that the first current increment value is greater than the first preset current range, it first obtains the current working voltage signal of the power supply module, analyzes the current working voltage signal based on the historical voltage signal, and determines whether the current working voltage signal has a sudden change. If so, the current increase can be solved by letting the power supply module update the working voltage signal; if it is not a sudden change in the working voltage signal, it is the second situation, and it is necessary to generate a light string fault prompt information to remind the staff to handle it. Among them, the wavelet transform algorithm is a common signal analysis algorithm, and its calculation process will not be described in detail here.

[0082] The above embodiment analyzes the operating voltage signal when an increase in the current of the LED module is detected, and checks for unstable power supply of the power supply module during long-term operation.

[0083] In some embodiments, the control module is further used to detect whether there is a repeated welding mark when the first current increment value is less than the first preset current range; if so, generate a light string fault prompt message; if not, generate a repeated welding mark, send a power-off instruction to the power supply module, and send a repeated welding instruction to the welding module in sequence; The welding module is also used to weld the LED module again after receiving a repeated welding instruction.

[0084] Among them, less than the first preset current range means less than the minimum value in the first preset current range; the LED module welded again is the LED module corresponding to the last welding instruction, and no new LED module is clamped for welding. After the welding module welds the LED module again, it sends a start instruction to the control module.

[0085] Specifically, if the control module receives a sensing signal, but the first current increment value is less than the first preset current range, it indicates that there may be three situations: 1. The newly welded LED module is not completely welded and no command signal is received, and the sensing signal is caused by changes in ambient light; 2. The newly welded LED module does not light up due to its own fault, and the sensing signal is caused by changes in ambient light; 3. The newly welded LED module lights up normally, but other LED modules in the parallel light string have faults.

[0086] Therefore, the present application instructs the welding module to weld the LED module again to exclude the first situation; after repeated welding, the judgment is started again from the power supply instruction and the first control instruction. If the first current increment value is still less than the first preset current range, it means that it is not a welding problem, but the second or third situation (in fact, under the premise that the signal detection module senses the change of the light signal according to the first control instruction, the possibility of the signal detection module generating a sensing signal due to the change of ambient light is very small. Therefore, if it is the second situation, after repeated welding, the control module will most likely generate a light string fault prompt information because it still cannot receive the sensing signal, and will not perform the subsequent current detection). Therefore, a light string fault prompt information can be generated to remind the staff to check which LED module in the parallel light string is faulty and replace it.

[0087] It is understandable that in the production process of parallel light strings, some LED modules may have an extremely short service life due to production yield issues. The present application cyclically lights up the parallel light strings during the address burning stage, and can also indirectly screen out these LED modules with extremely short service life, which is the third situation mentioned above.

[0088] The above embodiment adds a repeated welding operation when the first current increment value is less than the first preset current range, thereby troubleshooting welding problems, avoiding waste of LED modules, and indirectly improving production efficiency.

[0089] Furthermore, the control module is also used to obtain the initial current value of the parallel light string after sending the burning instruction; obtain the target current value of the parallel light string when sending the second control instruction and receiving the induction signal; obtain the second current increment value according to the initial current value and the target current value; determine whether the second current increment value is within the first preset current range; if so, send a power-off instruction to the power supply module; if not, generate a light string fault prompt information.

[0090] The first current increment value and the second current increment value are both obtained by subtracting two corresponding current values.

[0091] Because at this time only the newly welded LED module should have power, if the second current increment value is not within the first preset current range, it means that the following three situations may have occurred: 1. The LED module is lit but due to incorrect specifications; 2. The LED module is not lit due to a fault, and the sensing signal is caused by ambient light; 3. The parallel light string has problems such as cold soldering and short circuit. Any of the above three situations cannot be resolved by the control module itself, so a light string fault prompt message can be directly generated.

[0092] After sending the burning instruction, the control module in the above embodiment tests the LED module to be burned based on the second current increment value, so as to further improve the detection accuracy of the LED module and the parallel light string.

[0093] See also Figure 3 In some embodiments, the system further includes a spectral detection module disposed on the welding module.

[0094] The spectrum detection module may specifically adopt a spectrophotometer or automatic optical inspection (AOI) technology based on machine vision. The spectrum detection module is arranged on the welding module and corresponds to the latest welded LED module.

[0095] The spectrum detection module is connected to the control module and the signal detection module respectively; the control module is also used to send a second control instruction to the spectrum detection module; receive the color rendering index of the spectrum detection module, and determine whether the color rendering index is greater than a preset color difference threshold; if so, generate a light string fault prompt message; if not, send a power-off instruction to the power supply module.

[0096] The signal detection module is further used to send the sensing signal corresponding to the second control instruction to the spectrum detection module.

[0097] The spectrum detection module is used to obtain the target color rendering parameters according to the second control instruction.

[0098] After receiving the sensing signal, the spectrum detection module measures the actual color rendering parameters of the received light signal; takes the difference between the target color rendering parameters and the actual color rendering parameters as the color rendering index; and sends the color rendering index to the control module.

[0099] Specifically, the signal detection module can screen out LED modules whose brightness does not meet the standard, but cannot identify whether the color display of the LED module meets the standard. The LED module achieves different color light display by controlling the brightness of three colors of lamp beads. If a lamp bead is damaged or there is a bug in the algorithm for adjusting the duty cycle of the PWM signal inside the LED module, the displayed color will be different from the color required in the second control instruction. In this case, even if the LED module can be controlled to light up, it will affect the display effect of the entire light string and reduce the quality of the light string.

[0100] Therefore, the present application further adds a spectrum detection module; the module obtains the target color rendering parameters that the LED module needs to achieve through the second control instruction; the target color rendering parameters include the values ​​of the three color channels R, G, and B; then the signal detection module generates a sensing signal, that is, after detecting that the LED module is lit, the actual color rendering parameters of the light signal at this time are measured, and the difference between the two color rendering parameters is sent to the control module; also considering the influence of ambient light, the control module uses a preset color difference threshold to determine whether the color rendering parameters are within the allowable error range; if the color rendering parameters are greater than the preset color difference threshold, it means that the color difference of the LED module will be very obvious in actual display and cannot be used anymore.

[0101] The above embodiment realizes the detection of color difference displayed by LED modules during the production process of light strings based on the spectrum detection module, screens out LED modules whose color difference does not meet the requirements, and further improves the production quality of light strings.

[0102] In some embodiments, the welding module is further used to send a test voltage signal to the LED module before welding the LED module; calculate the load of the LED module according to the test voltage signal and the test current of the LED module and send it to the control module.

[0103] The control module is further used to obtain an operating voltage signal of the power supply module, and determine a first preset current range corresponding to the LED module according to the operating voltage signal and the load.

[0104] Specifically, when the welding module clamps the LED module, it can clamp its various pins and obtain the load of the LED module by sending a test voltage signal. The control module then sets the first preset current range used in current judgment according to its load. This not only can screen out LED modules that do not meet the specifications through test current in advance, thereby improving production efficiency, but it can also be compatible with a variety of LED modules of different specifications on a parallel light string, thereby greatly improving the diversity and flexibility of parallel light strings while achieving accurate quality screening during the production process.

[0105] In some embodiments, the power supply module adopts a Boost-Buck power supply structure.

[0106] Specifically, since each time an LED module is welded, the control module needs to perform quality screening and address burning, which poses a challenge to the stability of the working voltage signal of each power supply. This application requires the power supply module to adopt a Boost-Buck power supply structure to power the parallel light strings. Boost, as a stable voltage source, can guarantee the cumulative voltage drop requirements of multiple LED light strings. Buck, as a stable current source, directly drives the LED to emit light. This structure is conducive to platform design, reducing the number of peripheral components and bill of materials (BOM) costs, while improving system energy efficiency and reducing heat generation.

[0107] See also Figure 4 Another embodiment of the present application provides a method for recording addresses of parallel LEDs, comprising: Step S11, the control module sends a welding instruction to the welding module.

[0108] Step S12, the welding module receives the welding instruction from the control module, clamps the LED module and the parallel light string for welding; after the welding is completed, a start instruction is sent to the control module.

[0109] Step S13: After receiving the start instruction, the control module sends a power supply instruction to the power supply module.

[0110] Step S14, when receiving the power supply instruction, the power supply module sends a working voltage signal to the parallel light string.

[0111] Step S15, the control module sends a burning instruction to the parallel light string.

[0112] Step S16, after receiving the burning instruction, the LED module determines whether the address data is stored; if not, the address data is obtained according to the burning instruction and the address data is burned.

[0113] Step S17: the control module sends a power-off instruction to the power supply module.

[0114] Step S18: When the power supply module receives the power-off instruction, it stops sending the working voltage signal.

[0115] Specifically, after executing step S18, return to step S11.

[0116] Furthermore, the method also includes: After sending the power supply instruction, the control module sends a first control instruction to the parallel light string.

[0117] After receiving the first control instruction, the LED module lights up according to the first control instruction.

[0118] The signal detection module sends a sensing signal to the control module according to the detected light signal.

[0119] When receiving the sensing signal, the control module sends a burning instruction to the parallel light string.

[0120] Furthermore, the method also includes: After sending the burning instruction, the control module sends a second control instruction to the parallel light string.

[0121] The LED module receives the second control instruction and determines whether the control address in the second control instruction is equal to the stored address data; if so, the LED module lights up according to the second control instruction.

[0122] The signal detection module sends a sensing signal to the control module according to the detected light signal.

[0123] After receiving the sensing signal, the control module sends a power-off instruction to the power supply module.

[0124] Furthermore, the method also includes: The control module sends the first control instruction to the signal detection module.

[0125] The signal detection module obtains a signal fluctuation threshold according to the first control instruction; and calculates the difference between the optical signal peak values ​​at two adjacent moments within a preset time period; wherein the preset time period is centered on the moment of receiving the first control instruction.

[0126] The signal detection module determines whether the difference is greater than or equal to the signal fluctuation threshold; if so, it generates a sensing signal according to the difference and sends the sensing signal to the control module.

[0127] Furthermore, the method also includes: When the control module sends the first control instruction and receives the sensing signal, it obtains the current working current value of the parallel light string and the historical working current value recorded after the first control instruction was sent and the sensing signal was received last time.

[0128] The current increment value is calculated based on the current working current value and the historical working current value.

[0129] Determine whether the first current increment value is within a first preset current range; if so, send a burning instruction to the parallel light string.

[0130] Furthermore, the method also includes: When the current increment value is greater than the first preset current range, the control module obtains the working voltage signal and the historical voltage signal of the power supply module; compares the working voltage signal and the historical voltage signal based on the wavelet transform algorithm, and sends a power update instruction to the power supply module if there is a sudden change in the working voltage signal.

[0131] After receiving the power update instruction, the power supply module obtains an update voltage signal according to the power update instruction, and replaces the working voltage signal with the update voltage signal.

[0132] Furthermore, the method also includes: After sending the burning instruction, the control module obtains the initial current value of the parallel light string.

[0133] When the second control instruction is sent and the induction signal is received, the target current value of the parallel light string is obtained.

[0134] A second current increment value is obtained according to the initial current value and the target current value.

[0135] It is determined whether the second current increment value is within a first preset current range.

[0136] If yes, a power-off command is sent to the power supply module; if no, a light string fault prompt message is generated.

[0137] Furthermore, the method also includes: The control module sends the second control instruction to the spectrum detection module; The spectrum detection module obtains the target color rendering parameters according to the second control instruction; The signal detection module sends the sensing signal corresponding to the second control instruction to the spectrum detection module; After receiving the sensing signal, the spectrum detection module measures the actual color rendering parameters of the received light signal; the difference between the target color rendering parameters and the actual color rendering parameters is sent to the control module as a color rendering index; The control module receives the color rendering index of the spectrum detection module and determines whether the color rendering index is greater than a preset color difference threshold. If so, a light string fault prompt message is generated; if not, a power-off command is sent to the power supply module.

[0138] For the specific limitations of the address recording method for parallel LEDs provided in this embodiment, please refer to the above embodiment of the address recording system for parallel LEDs, which will not be repeated here.

[0139] See also Figure 5 , Figure 6 , Figure 7 and Figure 8 , the application also provides several packaging structures of three-wire LED modules.

[0140] Among them, GND is the ground pin, DIN is the data input pin, and VDD is the power pin.

[0141] In the parallel light string of the present application, the DIN pin of each LED module is connected to the data bus, one end of the data bus is connected to the output end of the control module, and the VDD pin of each LED module is connected to the power bus, one end of the power bus is connected to the output end of the power supply module. NC is a floating pin. The surface of the LED module package is a layer of transparent epoxy resin, which can be made into different shapes to control the light emission angle and achieve better lighting or display effects.

[0142] Soldering Module When soldering the LED module, its DIN, VDD and GND are connected to the bus of the light string.

[0143] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0144] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations 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 patent of the present application shall be subject to the attached claims.

Claims

1. A parallel LED address recording system, characterized in that: It includes a control module, a power supply module and a welding module; The control module sends a welding instruction to the welding module, and after receiving a welding module start instruction, sequentially sends a power supply instruction to the power supply module, sends a burning instruction to the parallel light string, and sends a power-off instruction to the power supply module; The welding module is used to clamp the LED module and the parallel light string for welding when receiving the welding instruction from the control module; after the welding is completed, a start instruction is sent to the control module; The power supply module is used to send a working voltage signal to the parallel light string when receiving the power supply instruction; and stop sending the working voltage signal when receiving the power-off instruction; The LED module is used to determine whether address data is stored after receiving the burning instruction; if not, obtain the address data according to the burning instruction and burn the address data.

2. The address recording system for parallel LEDs according to claim 1, characterized in that: It also includes a signal detection module; the signal detection module is arranged on the welding module and connected to the control module; The control module is also used to send a first control instruction to the parallel light string after sending the power supply instruction; and send the burning instruction to the parallel light string after receiving the sensing signal from the signal detection module; The signal detection module is used to send a sensing signal to the control module according to the detected light signal; The LED module is further configured to light up according to the first control instruction after receiving the first control instruction.

3. The address recording system for parallel LEDs according to claim 2, characterized in that: The control module is also used to send a second control instruction to the parallel light string after sending the burning instruction; and send the power-off instruction to the power supply module after receiving the sensing signal from the signal detection module; The LED module is also used to determine whether the control address in the second control instruction is equal to the stored address data after receiving the second control instruction; if so, light up according to the second control instruction.

4. The address recording system for parallel LEDs according to claim 2, characterized in that: The control module is also used to send the first control instruction to the signal detection module; The signal detection module is specifically used to obtain a signal fluctuation threshold according to the first control instruction; calculate the difference between the optical signal peak values ​​at two adjacent moments within a preset time period; wherein the preset time period is centered on the moment of receiving the first control instruction; determine whether the difference is greater than or equal to the signal fluctuation threshold; if so, generate the sensing signal according to the difference, and send the sensing signal to the control module.

5. The address recording system for parallel LEDs according to claim 3, characterized in that: The control module is also used to send the second control instruction to the signal detection module; The signal detection module is specifically used to obtain a signal fluctuation threshold according to the second control instruction; calculate the difference between the optical signal peak values ​​at two adjacent moments within a preset time period; wherein the preset time period is centered on the moment of receiving the second control instruction; determine whether the difference is greater than or equal to the signal fluctuation threshold; if so, generate the sensing signal according to the difference, and send the sensing signal to the control module.

6. The address recording system for parallel LEDs according to claim 2, characterized in that: The control module is further configured to obtain, when sending the first control instruction and receiving the sensing signal, the current working current value of the parallel light string and the historical working current value recorded after the first control instruction was sent and the sensing signal was received last time; Calculate a first current increment value according to the current working current value and the historical working current value; determine whether the first current increment value is within a first preset current range; If yes, the burning instruction is sent to the parallel light string.

7. The address recording system for parallel LEDs according to claim 6, characterized in that: The control module is also used to obtain the working voltage signal and the historical voltage signal of the power supply module when the first current increment value is greater than the first preset current range; compare the working voltage signal and the historical voltage signal based on the wavelet transform algorithm, and if there is a sudden change in the working voltage signal, send a power supply update instruction to the power supply module, otherwise generate a light string fault prompt information; The power supply module is used to obtain an update voltage signal according to the power update instruction after receiving the power update instruction, and replace the working voltage signal with the update voltage signal.

8. The address recording system for parallel LEDs according to claim 6, characterized in that: The control module is further used to detect whether there is a repeated welding mark when the first current increment value is less than the first preset current range; If it exists, a light string fault prompt message is generated; if it does not exist, a repeated welding mark is generated, and the power-off instruction is sent to the power supply module and the repeated welding instruction is sent to the welding module in sequence; The welding module is further used to weld the LED module again after receiving the repeated welding instruction.

9. The address recording system for parallel LEDs according to claim 6, characterized in that: The control module is also used to obtain the initial current value of the parallel light string after sending the burning instruction; When the second control instruction is sent and the induction signal is received, obtaining a target current value of the parallel light string; Obtaining a second current increment value according to the initial current value and the target current value; Determining whether the second current increment value is within the first preset current range; If yes, a power-off instruction is sent to the power supply module; If not, a light string fault prompt message is generated.

10. The address recording system for parallel LEDs according to claim 4, characterized in that: It also includes a spectrum detection module disposed on the welding module; the spectrum detection module is respectively connected to the control module and the signal detection module; The control module is also used to send the second control instruction to the spectrum detection module; receive the color rendering index of the spectrum detection module, and determine whether the color rendering index is greater than a preset color difference threshold; if so, generate a light string fault prompt message; if not, send the power-off instruction to the power supply module; The signal detection module is further used to send the sensing signal corresponding to the second control instruction to the spectrum detection module; The spectral detection module is used to obtain the target color rendering parameters according to the second control instruction; after receiving the sensing signal, measure the actual color rendering parameters of the received light signal; use the difference between the target color rendering parameters and the actual color rendering parameters as the color rendering index; and send the color rendering index to the control module.

11. The address recording system for parallel LEDs according to claim 6, characterized in that: The welding module is also used to send a test voltage signal to the LED module before welding the LED module; calculate the load of the LED module according to the test voltage signal and the test current of the LED module and send it to the control module; The control module is further used to obtain the working voltage signal of the power supply module, and determine a first preset current range corresponding to the LED module according to the working voltage signal, the load and a preset error.

12. The address recording system for parallel LEDs according to claim 1, characterized in that: The control module is also used to determine whether the address data in the burning instruction is equal to a preset welding threshold after sending the burning instruction; if not, after sending the power-off instruction to the power supply module, send a welding instruction to the welding module.

13. The address recording system for parallel LEDs according to claim 10, characterized in that: The power supply module adopts a Boost-Buck power supply structure; the spectrum detection module adopts a spectrophotometer.

14. A method for recording addresses of parallel LEDs, characterized in that: include: The control module sends a welding instruction to the welding module; The welding module receives the welding instruction from the control module, clamps the LED module and the parallel light string for welding; after the welding is completed, a start instruction is sent to the control module; After receiving the start-up instruction, the control module sends a power supply instruction to the power supply module; The power supply module sends a working voltage signal to the parallel light string when receiving the power supply instruction; The control module sends a burning instruction to the parallel light string; After receiving the burning instruction, the LED module determines whether the address data is stored; if not, obtains the address data according to the burning instruction and burns the address data; The control module sends a power-off instruction to the power supply module; When receiving the power-off instruction, the power supply module stops sending the working voltage signal.

15. The method for recording addresses of parallel LEDs according to claim 14, characterized in that: Also includes: After sending the power supply instruction, the control module sends a first control instruction to the parallel light string; After receiving the first control instruction, the LED module lights up according to the first control instruction; The signal detection module sends a sensing signal to the control module according to the detected light signal; When receiving the sensing signal, the control module sends the burning instruction to the parallel light string.

16. The method for recording addresses of parallel LEDs according to claim 15, characterized in that: Also includes: After sending the burning instruction, the control module sends a second control instruction to the parallel light string; The LED module receives the second control instruction, and determines whether the control address in the second control instruction is equal to the stored address data; If yes, lighting up according to the second control instruction; The signal detection module sends a sensing signal to the control module according to the detected light signal; After receiving the sensing signal, the control module sends the power-off instruction to the power supply module.

17. The method for recording addresses of parallel LEDs according to claim 15, characterized in that: Also includes: The control module sends the first control instruction to the signal detection module; The signal detection module obtains a signal fluctuation threshold according to the first control instruction; Calculating the difference between the peak values ​​of the optical signal at two adjacent moments within a preset time period; wherein the preset time period is centered on the moment when the first control instruction is received; The signal detection module determines whether the difference is greater than or equal to the signal fluctuation threshold; if so, generates the sensing signal according to the difference, and sends the sensing signal to the control module.

18. The method for recording addresses of parallel LEDs according to claim 14, characterized in that: Also includes: When the control module sends the first control instruction and receives the sensing signal, the control module obtains the current working current value of the parallel light string and the historical working current value recorded after the first control instruction was sent and the sensing signal was received last time; Calculate the current increment value according to the current working current value and the historical working current value; Determining whether the first current increment value is within a first preset current range; If yes, the burning instruction is sent to the parallel light string.

19. The method for recording addresses of parallel LEDs according to claim 18, characterized in that: Also includes: The control module acquires the working voltage signal and the historical voltage signal of the power supply module when the current increment value is greater than the first preset current range; Compare the working voltage signal with the historical voltage signal based on a wavelet transform algorithm, and if there is a sudden change in the working voltage signal, send a power supply update instruction to the power supply module; After receiving the power update instruction, the power supply module obtains an update voltage signal according to the power update instruction, and replaces the working voltage signal with the update voltage signal.

20. The method for recording addresses of parallel LEDs according to claim 18, characterized in that: Also includes: After sending the burning instruction, the control module obtains the initial current value of the parallel light string; When the second control instruction is sent and the induction signal is received, obtaining a target current value of the parallel light string; Obtaining a second current increment value according to the initial current value and the target current value; Determining whether the second current increment value is within the first preset current range; If yes, a power-off instruction is sent to the power supply module; If not, a light string fault prompt message is generated.

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