A lighting system

Abstract

The application is suitable for the field of lighting technology, and provides a lighting system.The lighting system comprises a first control module, a plurality of second control modules and a plurality of display modules, a power supply end of the first control module is connected with power supply ends of the plurality of second control modules and first ends of the plurality of display modules through power supply lines, output ends of the plurality of second control modules are connected with second ends of the plurality of display modules one by one, and a grounding end of the first control module is connected with grounding ends of the plurality of second control modules through a grounding line.The lighting system provided by the application only needs to adopt two connection lines of the power supply line and the grounding line, and has low cost;and the plurality of second control modules are connected in parallel, so that the use of other second control modules is not affected when any second control module is abnormal, and the system has high reliability.Therefore, the lighting system provided by the application effectively solves the problem that the reliability and low cost cannot be considered in the existing LED landscape lighting system.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of lighting, and particularly relates to a lighting system. BACKGROUND

[0002] The existing LED (Light-Emitting Diode) landscape lighting system is a series system using a zero-return code protocol cascade display chip or a parallel system using a DMX512 protocol (Digital Multiplex 512) cascade display chip. The series system using the zero-return code protocol cascade display chip adopts the zero-return code protocol, has a simple connection mode and low cost, but poor reliability: when a chip in the system is damaged, all subsequent cascade chips will be out of control. To improve this problem, a breakpoint continuation zero-return code cascade display chip series system is developed, which adds a wire to the single-wire zero-return code protocol cascade display chip series system, and although the system reliability is improved, if two consecutive cascade chips in the system are damaged, all subsequent cascade chips will still be out of control. The parallel system using the DMX512 protocol cascade display chip adopts differential DMX512 double-wire parallel connection, and any abnormal chip in the system does not affect the use of other chips, and has high reliability; the disadvantage is that the DMX512 protocol differential DA line and DB line, address line, power line and ground line are needed, and the cost is high.

[0003] Therefore, there is an urgent need for an LED landscape lighting system with high reliability and low cost. SUMMARY

[0004] The embodiment of the application provides a lighting system, which can solve the problem that the reliability and low cost cannot be considered in the existing LED landscape lighting system.

[0005] In a first aspect, the embodiment of the application provides a lighting system, which comprises a first control module, a plurality of second control modules and a plurality of display modules, a power supply end of the first control module is connected with power supply ends of the plurality of second control modules and first ends of the plurality of display modules through power supply lines, output ends of the plurality of second control modules are connected with second ends of the plurality of display modules in one-to-one correspondence, and a grounding end of the first control module is connected with grounding ends of the plurality of second control modules through a grounding line.

[0006] The first control module is used for outputting a first frequency modulation control signal to the plurality of second control modules through the power supply lines; the second control module is used for processing the first frequency modulation control signal according to a frequency judgment threshold value, obtaining a second signal, and outputting a first display signal to the corresponding display module according to the second signal, so that the display module displays according to a power supply signal on the power supply line and the first display signal.

[0007] In a possible implementation manner of the first aspect, the second control module comprises a display chip, a power supply pin of the display chip is connected with the power supply end of the first control module and the first end of the display module through a power supply line, a ground pin of the display chip is connected with a ground line, and an output pin of the display chip is connected with the second end of the corresponding display module.

[0008] In a possible implementation manner of the first aspect, the display chip comprises a frequency judgment unit, a decoding unit, a data analysis unit, a parameter analysis unit, a gamma correction unit and a constant current output unit, the decoding unit is connected with the frequency judgment unit, the data analysis unit and the parameter analysis unit respectively, the gamma correction unit is connected with the data analysis unit and the constant current output unit respectively, the parameter analysis unit is connected with the constant current output unit, and the constant current output unit is connected with the second end of the corresponding display module through an output pin of the display chip, and the frequency judgment unit is connected with a power supply line through a power supply pin of the display chip.

[0009] The frequency judgment unit is configured to process the first frequency modulation control signal according to a frequency judgment threshold to obtain a second signal; the decoding unit is configured to decode the second signal to obtain first address information, first data information and first parameter information, and judge the first address information, if the first address information does not match target address information, ignore the first data information and the first parameter information, and if the first address information matches the target address information, transmit the first data information to the data analysis unit and transmit the first parameter information to the parameter analysis unit; the data analysis unit is configured to analyze the first data information to obtain first display data; the parameter analysis unit is configured to analyze the first parameter information to obtain first parameter data; the gamma correction unit is configured to perform gamma correction on the first display data to obtain corrected first display data; and the constant current output unit is configured to output a first display signal to the corresponding display module according to the first parameter data and the corrected first display data, so that the display module displays according to the power supply signal and the first display signal.

[0010] In a possible implementation manner of the first aspect, the display chip further comprises a storage unit, and the storage unit is connected with the decoding unit.

[0011] The storage unit is used to store various preset display information; the first control module is used to output a second frequency modulation control signal to multiple frequency judgment units through a power line; the frequency judgment unit is used to process the second frequency modulation control signal according to the frequency judgment threshold to obtain a fourth signal; the decoding unit is used to decode the fourth signal to obtain second address information, judgment information, second data information, and second parameter information, and to judge the second address information. If the second address information does not match the target address information, the second data information and the second parameter information are ignored. If the second address information matches the target address information, the second parameter information is transmitted to the parameter parsing unit. At the same time, the judgment information is judged. If the judgment information is valid, the corresponding preset display information is obtained from the storage unit according to the second data information, and the preset display information is transmitted to the data parsing unit. If the judgment information is invalid, the second data information is transmitted to the data parsing unit. The parameter parsing unit is used to parse the second parameter information to obtain second parameter data.

[0012] In one possible implementation of the first aspect, when the judgment information is valid, the data parsing unit is used to parse the preset display information to obtain second display data; the gamma correction unit is used to correct the second display data to obtain corrected second display data; the constant current output unit is used to output a second display signal to the corresponding display module according to the second parameter data and the corrected second display data, so that the display module displays according to the power supply signal and the second display signal;

[0013] When the judgment information is invalid, the data parsing unit is used to parse the second data information to obtain the third display data; the gamma correction unit is used to correct the third display data to obtain the corrected third display data; the constant current output unit is used to output the third display signal to the corresponding display module according to the second parameter data and the corrected third display data, so that the display module displays according to the power supply signal and the third display signal.

[0014] In one possible implementation of the first aspect, the frequency determination threshold is a fixed frequency, an adaptive frequency, or a frequency range.

[0015] In one possible implementation of the first aspect, the display chip further includes a power-on reset unit for performing a power-on reset operation on the display chip.

[0016] In a possible implementation of the first aspect, the display chip further includes an oscillation unit configured to provide a clock signal for the display chip.

[0017] In a possible implementation of the first aspect, the first control module includes a light controller, a power supply pin of the light controller is connected to the power supply end of each of the second control modules and the first end of each of the display modules through the power supply line, and a ground pin of the light controller is connected to the ground line.

[0018] In a possible implementation of the first aspect, the display module includes a plurality of LED light strings, a negative electrode of each of the LED light strings is connected to the output end of the corresponding second control module, and a positive electrode of each of the LED light strings is connected to the power supply line.

[0019] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0020] The embodiments of the present application provide a lighting system, which includes a first control module, a plurality of second control modules and a plurality of display modules, the power supply end of the first control module is connected to the power supply end of each of the second control modules and the first end of each of the display modules through the power supply line, the output end of each of the second control modules is connected to the second end of the corresponding display module, and the ground end of the first control module is connected to the ground end of each of the second control modules through the ground line.

[0021] The first control module is configured to output a first frequency-modulated control signal to each of the second control modules through the power supply line, that is, the first frequency-modulated control signal carrying the display control instruction is superimposed on the power supply line through frequency modulation, so that the power supply and the control instruction are synchronously transmitted through one power supply line, and the display module can be controlled without additional control signal lines. The second control module is configured to process the first frequency-modulated control signal according to a frequency judgment threshold to obtain a second signal, output a first display signal to the corresponding display module according to the second signal, and make the display module display according to the power supply signal on the power supply line and the first display signal.

[0022] As can be seen from the above, the lighting system provided by the present application only needs to use two connection lines, i.e., the power supply line and the ground line, and has low cost; and the plurality of second control modules are connected in parallel, so that the use of any second control module will not affect the use of other second control modules, and the system has high reliability. Therefore, the lighting system provided by the present application effectively solves the problem that the reliability and low cost cannot be considered in the prior art LED landscape lighting system. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor.

[0024] Figure 1 is a schematic diagram of a serial connection system of a cascaded display chip of an existing single-line return-to-zero code protocol;

[0025] Figure 2 is a schematic diagram of a serial connection system of a cascaded display chip of an existing breakpoint resume transmission return-to-zero code protocol;

[0026] Figure 3 is a schematic diagram of a parallel connection system of a cascaded display chip of an existing DMX512 differential protocol;

[0027] Figure 4 is a schematic diagram of a lighting system according to an embodiment of the present application;

[0028] Figure 5 is a schematic diagram of a lighting system according to another embodiment of the present application;

[0029] Figure 6 is a schematic diagram of a display chip according to an embodiment of the present application;

[0030] Figure 7 is a schematic diagram of a display chip according to another embodiment of the present application;

[0031] Figure 8 is a schematic diagram of a display chip according to another embodiment of the present application;

[0032] Figure 9 is a frequency judgment schematic diagram of a frequency judgment unit according to an embodiment of the present application.

[0033] In the drawings: 1, lighting system; 10, first control module; 11, light controller; 20, second control module; 21, display chip; 211, frequency judgment unit; 212, decoding unit; 213, data analysis unit; 214, parameter analysis unit; 215, gamma correction unit; 216, constant current output unit; 217, storage unit; 218, power-on reset unit; 219, oscillation unit; 30, display module. DETAILED DESCRIPTION

[0034] In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular architectures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known methods, devices, circuits, and

[0035] It is to be understood that the terminology "includes", "has", "holds", "contains" or "comprises", "comprising", or "including" when used in this specification and in the following claims, specifies the presence of stated features, integers, steps, operations, elements, or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof.

[0036] It is also to be understood that the terminology "and / or" when used in this specification and in the following claims, refers to one and / or all possible combinations of one or more relevantly listed items.

[0037] As used in this specification and in the claims, the terms "if" and "when" can be interpreted to mean "upon" or "in response to a determination" or "in response to a detection" depending on the context. Similarly, the phrase "if it is determined" or "if [a described condition or event] is detected" can be interpreted to mean "upon determining" or "in response to a determination" or "upon detecting [the described condition or event]" or "in response to a detection of [the described condition or event]" depending on the context.

[0038] In addition, the terms "first", "second", "third", etc. in the description of the present application are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance.

[0039] Reference in the specification to "one embodiment" or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" or "in some embodiments" in various places in the specification are not necessarily all referring to the same embodiment, although it can. The terms "including", "containing", "having" and variations thereof are meant to encompass the terms "including but not limited to", unless otherwise expressly specified.

[0040] The LED landscape lighting system is a lighting system that takes LED technology as the core, combines the requirements of landscape design, and improves the level of night environment shaping of modern cities and scenic areas by means of light and shadow art; the core of the LED landscape lighting system is to realize the dynamic presentation of environmental aesthetics and the organic balance of functional requirements through intelligent control and artistic design of LED light sources.

[0041] Figure 1 The structure of a serial connection system of an existing single-line return-to-zero code protocol cascaded display chip is shown in FIG. 1, and the serial connection system of the single-line return-to-zero code protocol cascaded display chip adopts a return-to-zero code protocol, contains three connection lines of a return-to-zero code DIN1 data line, a power supply line and a ground line, has simple connection mode and low cost, but has poor reliability: when a chip in the system is damaged, all subsequent cascaded chips will be out of control. Figure 1

[0042] To improve this problem, a breakpoint continuation return-to-zero code protocol cascaded display chip serial connection system is developed subsequently, and the structure of the serial connection system is shown in FIG. 2, the serial connection system of the breakpoint continuation return-to-zero code protocol cascaded display chip contains four connection lines of a return-to-zero code DIN1 data line, a backup return-to-zero code DIN2 data line, a power supply line and a ground line, and one line is added to the serial connection system of the single-line return-to-zero code protocol cascaded display chip, although the reliability of the system is improved, but if two cascaded chips in the system are suddenly damaged, all subsequent cascaded chips will still be out of control. Figure 2

[0043] Figure 3 The structure of a parallel connection system of an existing DMX512 differential protocol cascaded display chip is shown in FIG. 3, and the parallel connection system of the DMX512 differential protocol cascaded display chip adopts differential DMX512 double-line parallel connection, and abnormality of any chip in the system does not affect the use of other chips, and the reliability is high; the disadvantage is that five connection lines of a differential DA line and a differential DB line of the DMX512 protocol, an address line, a power supply line and a ground line are required, and the cost is high. Figure 3

[0044] Therefore, there is an urgent need for an LED landscape lighting system with high reliability and low cost.

[0045] ​​​To solve the above problems, the embodiment of the present application provides a lighting system, comprising a first control module, a plurality of second control modules and a plurality of display modules, the power supply end of the first control module is connected with the power supply end of the plurality of second control modules and the first end of the plurality of display modules through power supply lines respectively, the output end of the plurality of second control modules is connected with the second end of the plurality of display modules one by one, and the grounding end of the first control module is connected with the grounding end of the plurality of second control modules through a grounding line. The first control module is used for outputting a first frequency modulation control signal to the plurality of second control modules through the power supply lines, that is, the first frequency modulation control signal carrying display control instructions is superimposed on the power supply lines through frequency modulation, and then the synchronous transmission of power supply and control instructions is realized through one power supply line, so that the control of the display modules can be completed without additional control signal lines. The second control module is used for processing the first frequency modulation control signal according to a frequency judgment threshold to obtain a second signal, and outputting a first display signal to the corresponding display module according to the second signal, so that the display module displays according to the power supply signal and the first display signal on the power supply line.

[0046] As can be seen from the above, the lighting system provided by the present application only needs to use two connection lines of power supply line and grounding line, and the cost is low; and the plurality of second control modules are connected in parallel, so that when any second control module is abnormal, it does not affect the use of other second control modules, and the system reliability is high. Therefore, the lighting system provided by the present application effectively solves the problem that the reliability and low cost cannot be considered in the existing LED landscape lighting system.

[0047] In order to illustrate the technical solutions described in the present application, the following will be described through specific embodiments.

[0048] Figure 4 The principle diagram of the lighting system 1 provided by the embodiment of the present application is shown. As shown in the figure, Figure 4 The lighting system 1 comprises a first control module 10, a plurality of second control modules 20 and a plurality of display modules 30, the power supply end of the first control module 10 is connected with the power supply end of the plurality of second control modules 20 and the first end of the plurality of display modules 30 through power supply lines respectively, the output end of the plurality of second control modules 20 is connected with the second end of the plurality of display modules 30 one by one, and the grounding end of the first control module 10 is connected with the grounding end of the plurality of second control modules 20 through a grounding line.

[0049] Specifically, the first control module 10 is configured to output the first frequency-modulated control signal to the plurality of second control modules 20 through the power line, that is, the first frequency-modulated control signal carrying the display control instruction is superimposed on the power line providing the power supply signal through frequency modulation, and then the power supply and the control instruction are synchronously transmitted through one power line, and the display module 30 can be controlled without additional control signal lines.

[0050] As can be seen from the above, the lighting system 1 provided in the present application only needs to use two connection lines of the power line and the ground line, and has low cost; and the plurality of second control modules 20 are connected in parallel, and when any second control module 20 is abnormal, it does not affect the use of other second control modules 20, and the system has high reliability. Therefore, the lighting system 1 provided in the present application effectively solves the problem that the reliability and low cost cannot be considered in the prior art LED landscape lighting system.

[0051] In an embodiment of the present application, as shown in Figure 5 The second control module 20 includes a display chip 21, the power supply pin of the display chip 21 is connected with the power supply end of the first control module 10 and the first end of the display module 30 through the power line, the ground pin of the display chip 21 is connected with the ground line, and the output pin of the display chip 21 is connected with the second end of the corresponding display module 30. In the embodiment, the output pin of the display chip 21 is an RGBW pin; it should be noted that the output pin can also be an RGB pin.

[0052] Specifically, the display chip 21 is a core functional unit for connecting the control end and the display end in the lighting system 1, and its core function is to realize the analysis of the first frequency-modulated control signal and the accurate output of the display instruction. Specifically, the display chip 21 first processes the first frequency-modulated control signal according to the frequency judgment threshold to obtain a second signal, and then outputs a first display signal to the corresponding display module 30 according to the second signal, so that the display module 30 displays according to the power supply signal on the power line and the first display signal.

[0053] In an embodiment of the present application, as shown in Figure 6As shown in the figure, the display chip 21 includes a frequency judgment unit 211, a decoding unit 212, a data analysis unit 213, a parameter analysis unit 214, a gamma correction unit 215, and a constant current output unit 216. The decoding unit 212 is connected with the frequency judgment unit 211, the data analysis unit 213, and the parameter analysis unit 214 respectively. The gamma correction unit 215 is connected with the data analysis unit 213 and the constant current output unit 216 respectively. The parameter analysis unit 214 is connected with the constant current output unit 216. The constant current output unit 216 is connected with the second end of the corresponding display module 30 through the output pin of the display chip 21. The frequency judgment unit 211 is connected with the power line through the power pin of the display chip 21.

[0054] Specifically, the frequency judgment unit 211 is used to process the first frequency control signal according to the frequency judgment threshold to obtain the second signal. The frequency judgment threshold is a fixed frequency, an adaptive frequency, or a frequency interval.

[0055] When the frequency judgment threshold is a fixed frequency, the fixed frequency is predefined by the communication protocol. Specifically, assuming that the frequency is represented by F, and the fixed frequency defined by the communication protocol is 0.5F, then the first control module 10 sends the first frequency control signal at the fixed frequency 0.5F. The frequency judgment unit 211 identifies and processes the first frequency control signal according to the fixed frequency. For example, if the frequency of the first frequency control signal is greater than 0.5F, it is determined as data 1; if it is less than 0.5F, it is determined as data 0, and then the first frequency control signal is converted into a string of digital signals (i.e., the second signal). Figure 9 As shown in the figure: if the frequency of the first frequency control signal is greater than 0.5F, it is determined as data 1; if it is less than 0.5F, it is determined as data 0, and then the first frequency control signal is converted into a string of digital signals (i.e., the second signal). This fixed frequency judgment method can only distinguish between data 0 and data 1, i.e., it corresponds to binary transmission, and the data transmission amount is relatively limited. It should be noted that when using a fixed frequency as a judgment reference, it can also be set that when the frequency of the first frequency control signal is less than the fixed frequency, it is determined as data 1, and when the frequency of the first frequency control signal is greater than the fixed frequency, it is determined as data 0.

[0056] When the frequency judgment threshold is an adaptive frequency, the frequency is dynamically variable. Usually, the first control module 10 will send the frequency value in advance before sending the signal each time to define the frequency judgment threshold of this time.

[0057] When the frequency judgment threshold is a frequency interval, for example, Figure 9As shown: if the frequency of the first frequency modulation control signal is in the interval (0, 0.25F), it is determined as data 00, in the interval (0.25F, 0.5F), it is determined as data 01, in the interval (0.5F, 0.75F), it is determined as data 10, and in the interval (0.75F, F), it is determined as data 11, thereby realizing quaternary data transmission. Similarly, by dividing more frequency intervals, octal, hexadecimal and higher order data transmission can also be realized to carry more data transmission capacity. It can be seen that the frequency interval determination method can effectively improve the data transmission capacity.

[0058] The decoding unit 212 is configured to decode the second signal to obtain first address information, first data information and first parameter information, and judge the first address information. If the first address information does not match the target address information, the first data information and the first parameter information are ignored, and the display module 30 corresponding to the first data information and the first parameter information is temporarily not displayed. If the first address information matches the target address information, the first data information is transmitted to the data analysis unit 213, and the first parameter information is transmitted to the parameter analysis unit 214. The target address information is the address information of the display chip 21 itself.

[0059] The data analysis unit 213 is configured to analyze the first data information to obtain first display data, i.e. display data (such as brightness, color, etc.) required by the subsequent display module 30.

[0060] The parameter analysis unit 214 is configured to analyze the first parameter information to obtain first parameter data, and the core is to configure display-related parameters (such as current adjustment amplitude, anti-jitter parameter setting, etc.).

[0061] The gamma correction unit 215 is configured to perform gamma correction on the first display data, such as correcting 8bit (256-level brightness) to 16bit (65536-level brightness), thereby obtaining corrected first display data.

[0062] The constant current output unit 216 is configured to output a first display signal to the corresponding display module 30 according to the first parameter data and the corrected first display data, so that the display module 30 displays according to the power supply signal and the first display signal, i.e. realizes the lighting function according to the first frequency modulation control signal sent by the first control module 10.

[0063] In an embodiment of the present application, due to the limited data transmission capacity of the power line, the lighting system 1 has limitations such as single display function and fixed change mode. Therefore, a storage unit is added in the display chip 21 for storing preset display information corresponding to various display effects, and corresponding instructions are set on the frequency modulation control signal to realize the selection of different display effects, thereby improving the shortcomings of the lighting system 1 in terms of single display function and fixed change mode to a certain extent.

[0064] As shown in Figure 7 The display chip 21 further comprises a storage unit 217 connected with the decoding unit 212.

[0065] Specifically, the storage unit 217 is configured to store a plurality of preset display information. The first control module 10 is configured to output a second frequency modulation control signal to the plurality of frequency judgment units 211 through the power line, that is, the second frequency modulation control signal carrying display control instructions is superimposed on the power line providing the power supply signal through frequency modulation, and then the synchronous transmission of power supply and control instructions is realized through one power line, and the control of the display module 30 can be completed without additional control signal line. The frequency judgment unit 211 is configured to process the second frequency modulation control signal according to a frequency judgment threshold to obtain a fourth signal. The decoding unit 212 is configured to decode the fourth signal to obtain second address information, judgment information, second data information and second parameter information, and judge the second address information. If the second address information does not match the target address information, the second data signal and the second parameter information are ignored, and the corresponding display module 30 is temporarily not displayed; if the second address information matches the target address information, the second parameter information is transmitted to the parameter analysis unit 214, and the judgment information is judged. If the judgment information is valid (for example, 01), it is determined that the preset display information needs to be obtained from the storage unit 217, the corresponding preset display information is obtained from the storage unit 217 according to the second data information, and the preset display information is transmitted to the data analysis unit 213; if the judgment information is invalid (for example, 00), the preset display information does not need to be obtained from the storage unit 217, and the second data information is directly transmitted to the data analysis unit 213. The parameter analysis unit 214 is configured to analyze the second parameter to obtain second parameter data, and the core is to configure the display related parameters (such as current adjustment amplitude, de-bouncing parameter setting, etc.).

[0066] More specifically, when the judgment information is valid, the data analysis unit 213 is configured to analyze the preset display information to obtain second display data, that is, the display data (such as brightness, color, etc.) required by the subsequent display module 30; the gamma correction unit 215 is configured to correct the second display data, such as correcting 8bit (256-level brightness) to 16bit (65536-level brightness), thereby obtaining corrected second display data; the constant current output unit 216 is configured to output a second display signal to the corresponding display module 30 according to the second parameter data and the corrected second display data, so that the display module 30 displays according to the power supply signal and the second display signal, that is, the lighting function is realized according to the second frequency modulation control signal sent by the first control module 10.

[0067] When the judgment information is invalid, the data analysis unit 213 is configured to analyze the second data information to obtain third display data, i.e., display data (such as brightness, color, etc.) required by the subsequent display module 30; the gamma correction unit 215 is configured to correct the third display data, such as correcting 8 bits (256 levels of brightness) to 16 bits (65536 levels of brightness), so as to obtain corrected third display data; and the constant current output unit 216 is configured to output the third display signal to the corresponding display module 30 according to the second parameter data and the corrected third display data, so that the display module 30 displays according to the power supply signal and the third display signal, i.e., realizes the lighting function according to the second frequency modulation control signal sent by the first control module 10.

[0068] In an embodiment of the present application, as shown in Figure 8 The display chip 21 further includes a power-on reset unit 218, which is configured to perform a power-on reset operation on the display chip 21, so as to ensure that each functional unit in the display chip 21 is in a preset initial state after the power-on reset.

[0069] In an embodiment of the present application, as shown in Figure 8 The display chip 21 further includes an oscillation unit 219, which is configured to provide a clock signal for the display chip 21, so as to ensure accurate synchronization and coordination of each functional unit in the display chip 21, ensure timing accuracy of data transmission and processing, and thus realize stable and clear display effect.

[0070] In an embodiment of the present application, as shown in Figure 5 The first control module 10 includes a light controller 11, a power supply pin of the light controller 11 is connected to the power supply end of each second control module 20 and the first end of each display module 30 through a power supply line, and a grounding pin of the light controller 11 is connected to a grounding line.

[0071] Specifically, when the storage unit 217 is not added in the display chip 21, the light controller 11 is configured to output the first frequency modulation control signal to the plurality of display chips 21 through the power supply line. When the storage unit 217 is added in the display chip 21, the light controller 11 is configured to output the second frequency modulation control signal to the plurality of display chips 21 through the power supply line. The core is that the frequency modulation control signal carrying the display control instruction is superimposed on the power supply line providing the power supply signal in a frequency modulation manner, so as to realize synchronous transmission of the power supply and the control instruction through one power supply line, and the control of the display module 30 can be completed without additional control signal line.

[0072] In an embodiment of the present application, as shown in Figure 5As shown, the display module 30 includes a plurality of LED light strings, the negative poles of the plurality of LED light strings are connected with the output ends of the corresponding second control modules 20, and the positive poles of the plurality of LED light strings are connected with the power line. Based on the output pin of the display chip 21 being an RGBW pin, Figure 5 Therefore, four LED light strings are shown, which respectively correspond to a red LED light string, a green LED light string, a blue LED light string, and a white LED light string. The number of LED light strings in the display module 30 can be adjusted according to the type of the output pin of the display chip 21, for example, when the output pin of the display chip 21 is an RGB pin, the display module 30 can be provided with three LED light strings, which respectively correspond to a red LED light string, a green LED light string, and a blue LED light string.

[0073] In summary, the lighting system 1 proposed in the present application only needs to use two connection lines of the power line and the ground line, and has low cost; and the plurality of second control modules 20 are connected in parallel, and when any second control module 20 is abnormal, it does not affect the use of other second control modules 20, and the system has high reliability. Therefore, the lighting system 1 proposed in the present application effectively solves the problem that the reliability and low cost cannot be considered in the prior art LED landscape lighting system.

[0074] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in a certain embodiment can be referred to the related description of other embodiments.

[0075] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A lighting system, characterized in that, It includes a first control module, multiple second control modules, and multiple display modules. The power supply terminal of the first control module is connected to the power supply terminals of the multiple second control modules and the first terminals of the multiple display modules respectively via power lines. The output terminals of the multiple second control modules are connected to the second terminals of the multiple display modules one by one. The ground terminal of the first control module is connected to the ground terminal of the multiple second control modules via a grounding wire. The first control module is used to output a first frequency modulation control signal to multiple second control modules through a power line; the second control module is used to process the first frequency modulation control signal according to a frequency judgment threshold to obtain a second signal, and output a first display signal to the corresponding display module according to the second signal, so that the display module displays according to the power supply signal on the power line and the first display signal; The second control module includes a display chip. The power supply pin of the display chip is connected to the power supply terminal of the first control module and the first terminal of the display module via a power supply line. The ground pin of the display chip is connected to a ground line. The output pin of the display chip is connected to the second terminal of the corresponding display module. The display chip includes a frequency determination unit, a decoding unit, a data parsing unit, a parameter parsing unit, a gamma correction unit, and a constant current output unit. The decoding unit is connected to the frequency determination unit, the data parsing unit, and the parameter parsing unit. The gamma correction unit is connected to the data parsing unit and the constant current output unit. The parameter parsing unit is connected to the constant current output unit. The constant current output unit is connected to the second terminal of the corresponding display module through the output pin of the display chip. The frequency determination unit is connected to the power supply line through the power supply pin of the display chip. The frequency judgment unit is used to process the first frequency modulation control signal according to a frequency judgment threshold to obtain a second signal; the decoding unit is used to decode the second signal to obtain first address information, first data information, and first parameter information, and to judge the first address information. If the first address information does not match the target address information, the first data information and the first parameter information are ignored. If the first address information matches the target address information, the first data information is transmitted to the data parsing unit, and the first parameter information is transmitted to the parameter parsing unit; the data parsing unit is used to parse the first data information to obtain first display data; the parameter parsing unit is used to parse the first parameter information to obtain first parameter data; the gamma correction unit is used to perform gamma correction on the first display data to obtain corrected first display data; the constant current output unit is used to output a first display signal to the corresponding display module according to the first parameter data and the corrected first display data, so that the display module displays according to the power supply signal and the first display signal; The frequency determination threshold is a fixed frequency, an adaptive frequency, or a frequency range; When the frequency judgment threshold is a fixed frequency, the fixed frequency is predefined by the communication protocol. The frequency judgment unit identifies the first frequency modulation control signal according to the fixed frequency. If the frequency of the first frequency modulation control signal is greater than the fixed frequency, it is determined to be data 1; if it is less than the fixed frequency, it is determined to be data 0. Then, the first frequency modulation control signal is converted into a second signal. When the frequency judgment threshold is an adaptive frequency, the first control module will pre-send a frequency value before each signal transmission to define the frequency judgment threshold for that transmission. When the frequency judgment threshold is a frequency range and the frequency is represented by F, the frequency judgment unit identifies the first frequency modulation control signal according to the frequency range. If the frequency of the first frequency modulation control signal is in the range of (0, 0.25F), it is determined to be data 00; if it is in the range of (0.25F, 0.5F), it is determined to be data 01; if it is in the range of (0.5F, 0.75F), it is determined to be data 10; if it is in the range of (0.75F, F), it is determined to be data 11. This achieves quaternary data transmission.

2. The lighting system according to claim 1, characterized in that, The display chip also includes a storage unit, which is connected to the decoding unit; The storage unit is used to store multiple preset display information; the first control module is used to output a second frequency modulation control signal to multiple frequency judgment units through a power line; the frequency judgment unit is used to process the second frequency modulation control signal according to the frequency judgment threshold to obtain a fourth signal; the decoding unit is used to decode the fourth signal to obtain second address information, judgment information, second data information and second parameter information, and to judge the second address information. If the second address information does not match the target address information, the second data information and the second parameter information are ignored. If the second address information matches the target address information, the second parameter information is transmitted to the parameter parsing unit. At the same time, the judgment information is judged. If the judgment information is valid, the corresponding preset display information is obtained from the storage unit according to the second data information, and the preset display information is transmitted to the data parsing unit. If the judgment information is invalid, the second data information is transmitted to the data parsing unit. The parameter parsing unit is used to parse the second parameter information to obtain the second parameter data.

3. The lighting system according to claim 2, characterized in that, When the judgment information is valid, the data parsing unit is used to parse the preset display information to obtain the second display data; the gamma correction unit is used to correct the second display data to obtain the corrected second display data; the constant current output unit is used to output the second display signal to the corresponding display module according to the second parameter data and the corrected second display data, so that the display module displays according to the power supply signal and the second display signal; When the judgment information is invalid, the data parsing unit is used to parse the second data information to obtain the third display data; the gamma correction unit is used to correct the third display data to obtain the corrected third display data; the constant current output unit is used to output the third display signal to the corresponding display module according to the second parameter data and the corrected third display data, so that the display module displays according to the power supply signal and the third display signal.

4. The lighting system according to any one of claims 1-3, characterized in that, The display chip also includes a power-on reset unit, which is used to perform a power-on reset operation on the display chip.

5. The lighting system according to any one of claims 1-3, characterized in that, The display chip also includes an oscillation unit, which is used to provide a clock signal for the display chip.

6. The lighting system according to any one of claims 1-3, characterized in that, The first control module includes a light controller. The power pin of the light controller is connected to the power terminals of multiple second control modules and the first terminals of multiple display modules respectively via power lines. The ground pin of the light controller is connected to a ground line.

7. The lighting system according to any one of claims 1-3, characterized in that, The display module includes multiple LED light strings, the negative terminals of which are connected to the output terminals of the corresponding second control modules, and the positive terminals of which are connected to the power lines.

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