CN211457444U - LED system with alternating current zero-crossing signal path and power supply path separated - Google Patents
LED system with alternating current zero-crossing signal path and power supply path separated Download PDFInfo
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- CN211457444U CN211457444U CN202020119537.0U CN202020119537U CN211457444U CN 211457444 U CN211457444 U CN 211457444U CN 202020119537 U CN202020119537 U CN 202020119537U CN 211457444 U CN211457444 U CN 211457444U
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Abstract
The utility model provides a separate LED system of alternating current zero passage signal route and supply path, the LED system includes: the LED light source comprises a plurality of LED subsystems, a separated power supply channel and an alternating current zero-crossing signal channel, wherein the LED subsystems are electrically connected with the power supply channel and the alternating current zero-crossing signal channel; after the LED subsystems are electrified and initialized, the alternating current zero-crossing signal circuit is started and provides alternating current zero-crossing signals for the LED subsystems. The utility model provides a LED system does not need special signal transmission route, does not need special main control unit system, just can realize containing the large-scale LED system of a plurality of LED lamp cluster according to setting for the mode work.
Description
Technical Field
The utility model relates to a LED control technology field, concretely relates to alternating current zero passage signal route and detached LED system of supply channel.
Background
Large LED systems, current control technologies include DMX512 systems and return-to-zero code based control systems. DMX512 is a digital dimming protocol, can carry out digital control to dimmers and other control equipment in places such as stages, theaters, studios and the like by applying the digital dimming protocol, is suitable for a one-point multi-point master-slave control system, adopts a multi-point bus structure in an interconnection form, does not have the problem of information channel blockage, and has simple connection and high reliability. The return-to-zero code is a coding mode that the signal level is restored to zero within one code element and comprises two coding modes of Manchester coding and differential Manchester coding. It is a kind of binary information coding, which uses pulses with different polarities to represent binary '1' and '0', respectively, and after the pulse is over, it will maintain a zero level for a period of time. Self-synchronization is possible but the information density is low.
For example, chinese patent publication No. CN104754795A discloses a DMX512 control system and an address allocation method, where the address allocation method includes the steps of: (a) the main controller broadcasts address allocation initialization information; (b) after each control unit receives the address allocation initialization information, clearing the address of each control unit, delaying for a first preset time, and disconnecting the signal line of the DMX512 system by using a controllable switch; (c) the main controller sends address allocation information; (d) receiving the address allocation information by a control unit adjacent to the main controller; (e) the adjacent control units set the address of the control unit according to the address allocation information, generate new address allocation information, control the controllable switch to be closed to enable the signal line of the DMX512 system to be connected, and send the new address allocation information to the next adjacent control unit, and other control units of the DMX512 system repeat the execution steps of the adjacent control units, sequentially receive the address allocation information sent by the previous adjacent control unit, and set the address of the control unit according to the address allocation information. For example, chinese patent publication No. CN107231193A discloses a visible light communication dimming method based on special constellation point modulation and reverse return-to-zero coding. The dimming method mainly comprises three parts of special constellation point modulation, reverse return-to-zero coding and pulse forming; the modulation format of the special constellation point is circular (7,1), the reverse return-to-zero coding adopts high level to replace low level of the traditional return-to-zero code, even if the duty ratio is small, the LED can be kept in a lighting state, the illumination efficiency is effectively improved, and meanwhile, the flicker which can be perceived by human eyes is avoided. Meanwhile, the return-to-zero code causes spectrum broadening, which is not beneficial to the realization of visible light communication with limited bandwidth, so that pulse forming is adopted for filtering to achieve the purpose of compressing the spectrum. Compare with traditional scheme of adjusting luminance, the utility model discloses have higher illumination efficiency and the wideer scope of adjusting luminance, can keep higher transmission rate simultaneously.
No matter the DMX512 system or the return-to-zero code control system, the lamps need to be connected through signal lines, and control signals corresponding to the lamp systems are sent through the main controller, so that the control of the large-scale LED system is realized. The DMX512 system or the return-to-zero code control system has beautiful control effect of the lamp decoration, but has complex engineering construction and high cost of the control system.
Therefore, it is an urgent technical problem in the art to provide an LED control system with simple structure and low cost.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an alternating current zero passage signal route and detached LED system of supply channel, this LED system does not need special signal transmission route, does not need special main control unit system, just can realize containing the large-scale LED system of a plurality of LED lamp cluster according to setting for the mode work.
The utility model provides a following technical scheme:
an LED system with an alternating current zero crossing signal path separate from a power supply path, the LED system comprising:
the LED system includes:
the LED light source comprises a plurality of LED subsystems, a separated power supply channel and an alternating current zero-crossing signal channel, wherein the LED subsystems are electrically connected with the power supply channel and the alternating current zero-crossing signal channel;
after the LED subsystems are electrified and initialized, the alternating current zero-crossing signal circuit is started and provides alternating current zero-crossing signals for the LED subsystems.
The LED subsystems can be powered by the same power supply circuit, and can also be powered by a plurality of power supply circuits in groups. Preferably, the LED subsystems are independently powered by a specific power supply circuit.
Preferably, the LED system includes a zero-crossing start controllable switch, a live wire of the alternating current zero-crossing signal path is electrically connected to the zero-crossing start controllable switch, the zero-crossing start controllable switch is switched from off to on after the plurality of LED subsystems are powered on and initialized, and the alternating current zero-crossing signal path is switched on and provides an alternating current zero-crossing signal for the plurality of LED subsystems.
Preferably, the alternating current zero-crossing signal path transmits alternating current of a mains supply. The alternating current zero-crossing signal path can also transmit alternating current with other frequencies and voltage amplitudes.
Preferably, the LED subsystem comprises an alternating current zero-crossing detection circuit, an LED mode control circuit and an LED lamp string; the alternating current zero-crossing detection circuit is electrically connected with the alternating current zero-crossing signal passage; the alternating current zero-crossing detection circuit detects an alternating current zero-crossing signal of the alternating current zero-crossing signal circuit and outputs an alternating current zero-crossing detection signal to the LED mode control circuit; the LED mode control circuit takes the alternating current zero-crossing detection signal as a beat control signal to trigger and set the LED lamp string mode.
Preferably, the LED subsystem includes an ac-to-dc conversion module having one end electrically connected to the power supply path, an output dc power supply to the ac zero-crossing detection circuit, an LED mode control circuit, and an LED string.
The alternating current zero-crossing detection circuit comprises a unidirectional conductive device, a first voltage-dividing resistor, a second voltage-dividing resistor, an optical coupler device and a current-limiting resistor;
preferably, the anode of the unidirectional conductive device is electrically connected with the live wire of the alternating current zero-crossing signal path, the cathode of the unidirectional conductive device is electrically connected with one end of a first voltage-dividing resistor, the other end of the first voltage-dividing resistor is electrically connected with one end of a second voltage-dividing resistor, and the other end of the second voltage-dividing resistor is electrically connected with the zero wire of the alternating current zero-crossing signal path; the other end of the first divider resistor is electrically connected with the anode of a light emitting diode in the optical coupler device, and the cathode of the light emitting diode in the optical coupler device is electrically connected with the zero line of the alternating current zero-crossing signal path; one end of the current-limiting resistor is electrically connected with the direct-current power supply, the other end of the current-limiting resistor is electrically connected with a collector of the optocoupler, and an emitter of the optocoupler is electrically connected with the ground; and a collector of the optical coupler device outputs the alternating current zero-crossing detection signal.
Preferably, the LED mode control circuit includes a single chip and a controllable switch, an input end of the single chip is electrically connected to the collector of the optocoupler, and an output end of the single chip is electrically connected to a control end of the controllable switch; the input end of the controllable switch is connected with the cathode of the LED lamp string, and the output end of the controllable switch is electrically connected with the ground; the power supply end of the singlechip is electrically connected with the direct-current power supply; and the ground end of the singlechip is connected with the ground.
The LED lamp string can be a common LED, and can also be a module comprising a plurality of light-emitting diodes and a drive control chip.
Preferably, the LED lamp string comprises a plurality of LED modules, each LED module comprises an LED driving chip, and the color mode of each LED module is changed by triggering of an edge signal through the LED driving chip.
Preferably, the edge signal includes a rising edge signal and a falling edge signal; the controllable switch is switched on from cut-off, the anode of the LED lamp string and the cathode of the LED lamp string are equal in potential and unequal in potential, and the LED lamp string receives the rising edge signal; the controllable switch is switched on and off, the anode of the LED light string and the cathode of the LED light string are in equal potential from unequal potential to equal potential, and the LED light string receives the falling edge signal.
The utility model provides a LED system is through separating electric connection to LED subsystem with alternating current zero passage signal route and supply circuit, can avoid each LED subsystem begins to detect at different moments the alternating current zero passage signal of alternating current zero passage signal route. The utility model discloses an after the electricity initialization on the LED subsystem, by the alternating current zero passage detection passageway is opened, the alternating current zero passage detection circuit of a plurality of LED subsystem begins to receive alternating current zero passage signal at same time point, avoids the LED subsystem leads to beginning to detect at different moments because of the difference of supply circuit itself the alternating current zero passage signal of alternating current zero passage signal passageway. The utility model discloses an with alternating current zero passage signal cycle time is the time unit, a plurality of LED subsystem simultaneously by alternating current zero passage signal triggers and sets up LED lamp cluster mode.
Compared with the prior art, the utility model provides a LED system does not need special signal transmission route, does not need special main control unit system, just can realize containing the large-scale LED system of a plurality of LED lamp cluster according to setting for the mode work. And the circuit structure of the whole LED system is simple, the engineering construction is convenient, and the cost is low.
Drawings
FIG. 1 is an LED system with an AC zero crossing signal path separated from a power supply path in an embodiment;
FIG. 2 is an LED subsystem in an LED system with an AC zero crossing signal path separated from a power supply path in an embodiment;
fig. 3 shows an LED module according to an embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the present embodiment provides an LED system 1 with a separate ac zero-crossing signal path and power supply path, including:
the system comprises a first LED subsystem 11, a second LED subsystem 12, a third LED subsystem 13 and a fourth LED subsystem 14, an alternating current zero-crossing signal path 15, a zero-crossing starting controllable switch 17 and a power supply path 16. The 4 LED subsystems 11, 12, 13, 14 are powered by the same power supply path 16.
In this embodiment, the power supply path 16 is connected to 220V50Hz mains ac power, and the input terminal of the zero-crossing turn-on controllable switch 17 is connected to 220V50Hz mains ac power. The first LED subsystem 11, the second LED subsystem 12, the third LED subsystem 13, and the fourth LED subsystem 14 are powered by the power supply path 16 first, so that the 4 LED subsystems are in a stable state. Then, the zero-crossing opening controllable switch 17 is opened to be closed, and the alternating current zero-crossing signal path 15 is opened and provides the alternating current zero-crossing signals for the 4 LED subsystems 11, 12, 13, 14.
In this embodiment, as shown in fig. 2, the first LED subsystem 11, the second LED subsystem 12, the third LED subsystem 13, and the fourth LED subsystem 14 adopt the same circuit structure 2, which includes a 220V50Hz ac-to-dc 5V module 21 (ac-to-dc module), an ac zero-crossing detection circuit 22, an LED mode control circuit 23, and an LED string 24. In this embodiment, the input end of the module 21 for converting 220V50Hz ac into dc 5V is connected to the power supply path 16, and the input end of the ac zero-crossing detection circuit 22 is connected to the ac zero-crossing signal path 15. The 220V50Hz AC-to-DC 5V module 21 adopts a conventional AC-DC switching power supply on the market. When the alternating current zero-crossing signal circuit 15 is opened, the alternating current zero-crossing detection circuits 22 of the 4 LED subsystems start to receive the alternating current zero-crossing signal of the 220V50Hz mains supply alternating current at the same time point.
In other embodiments, different circuit configurations may be used for the various LED subsystems.
As shown in fig. 2, in the present embodiment, the alternating current zero-crossing detection circuit 22 includes a unidirectional conductive device 221, a first voltage-dividing resistor 222, a second voltage-dividing resistor 223, an optical coupler device 224, and a current-limiting resistor 225;
the unidirectional conductive device 221 is a rectifier diode 1N4007, the anode of the unidirectional conductive device 221 is connected with the live wire of the alternating current zero-crossing signal path 15, the cathode of the unidirectional conductive device 221 is connected with one end of a first voltage-dividing resistor 222, the other end of the first voltage-dividing resistor 222 is connected with one end of a second voltage-dividing resistor 223, and the other end of the second voltage-dividing resistor 223 is connected with the zero wire of the alternating current zero-crossing signal path 15; the other end of the first voltage dividing resistor 222 is connected with the anode of a light emitting diode in the optical coupler 224, and the cathode of the light emitting diode in the optical coupler 224 is connected with the zero line of the alternating current zero-crossing signal circuit 15; one end of the current limiting resistor 225 is connected with the anode of the module 21 for converting 220V50Hz AC into DC 5V, the other end is electrically connected with the collector of the optocoupler 224, and the emitter of the optocoupler 224 is electrically connected with the ground; the collector of the optocoupler 224 outputs an ac zero crossing detection signal, which is connected to the LED mode control circuit 23. The first voltage dividing resistor 222 adopts a 10K ohm resistance value, the second voltage dividing resistor 223 adopts a 10K ohm resistance value, the optical coupler 224 adopts a 817 optical coupler, and the current limiting resistor 225 adopts a 1K ohm resistance value.
As shown in fig. 2, in the present embodiment, the LED mode control circuit 23 includes a single chip 231 and an N-channel MOSFET232, a power supply terminal (pin numbered 1) of the single chip 231 is connected to a positive electrode of the module 21 for converting 220V50Hz ac into dc 5V, a ground terminal (pin numbered 8) of the single chip 231 is grounded, and an input terminal (pin numbered 2) of the single chip 231 is connected to an output (collector output of the optical coupler 224) of the ac zero-cross detection circuit 22. The output end (number is 6 pin) of the singlechip is connected with the grid electrode of the N-channel MOSFET232, the drain electrode of the N-channel MOSFET232 is connected with the cathode of the LED lamp string 24, and the source electrode of the N-channel MOSFET232 is connected with the ground.
As shown in fig. 2, in the present embodiment, the LED string 24 includes 4 LED modules, which are a first LED module 241, a second LED module 242, a third LED module 243 and a fourth LED module 244. The first LED module 241, the second LED module 242, the third LED module 243 and the fourth LED module 244 adopt the same LED module circuit structure 3. As shown in fig. 3, the LED module circuit structure 3 includes an LED driving chip 31, a red diode 32, a green diode 33, and a blue diode 34.
In this embodiment, first, the first LED subsystem 11, the second LED subsystem 12, the third LED subsystem 13, and the fourth LED subsystem 14 are powered by the power supply path 16 to implement power-on initialization; then, the zero-crossing starting controllable switch 17 is closed, and the alternating current zero-crossing signal passage 15 provides alternating current zero-crossing signals for the first LED subsystem 11, the second LED subsystem 12, the third LED subsystem 13 and the fourth LED subsystem 14; the alternating current zero-crossing detection circuit 22 detects an alternating current zero-crossing signal of the alternating current zero-crossing signal passage 15 and outputs the alternating current zero-crossing detection signal to the LED mode control circuit 23; the LED mode control circuit of each LED subsystem takes the alternating current zero-crossing detection signal as a beat control signal to trigger and set the LED lamp string mode of each LED subsystem.
Claims (8)
1. An LED system with an AC zero-crossing signal path separated from a power supply path, the LED system comprising:
the LED light source comprises a plurality of LED subsystems, a power supply channel and an alternating current zero-crossing signal channel, wherein the LED subsystems are electrically connected with the power supply channel and the alternating current zero-crossing signal channel;
after the LED subsystems are electrified and initialized, the alternating current zero-crossing signal circuit is started and provides alternating current zero-crossing signals for the LED subsystems.
2. The LED system with the AC zero-crossing signal path separated from the power supply path according to claim 1, wherein the LED system comprises a zero-crossing start controllable switch, the live wire of the AC zero-crossing signal path is electrically connected with the zero-crossing start controllable switch, the zero-crossing start controllable switch is switched from off to on after the power-on initialization of the plurality of LED subsystems, and the AC zero-crossing signal path is switched on and provides the AC zero-crossing signal for the plurality of LED subsystems.
3. The LED system with the AC zero-crossing signal path separated from the power supply path as claimed in claim 2, wherein the LED subsystem comprises an AC zero-crossing detection circuit, an LED mode control circuit and an LED light string; the alternating current zero-crossing detection circuit is electrically connected with the alternating current zero-crossing signal passage; the alternating current zero-crossing detection circuit detects an alternating current zero-crossing signal of the alternating current zero-crossing signal circuit and outputs an alternating current zero-crossing detection signal to the LED mode control circuit; the LED mode control circuit takes the alternating current zero-crossing detection signal as a beat control signal to trigger and set the LED lamp string mode.
4. The LED system with a separated AC zero-crossing signal path and a separated power supply path of claim 3, wherein the LED subsystem comprises an AC-to-DC conversion module with one end electrically connected with the power supply path, an output DC power supply to the AC zero-crossing detection circuit, the LED mode control circuit and the LED lamp string.
5. The LED system with the AC zero-crossing signal path separated from the power supply path of claim 4,
the alternating current zero-crossing detection circuit comprises a unidirectional conductive device, a first voltage-dividing resistor, a second voltage-dividing resistor, an optical coupler device and a current-limiting resistor;
the anode of the unidirectional conductive device is electrically connected with the live wire of the alternating current zero-crossing signal passage, the cathode of the unidirectional conductive device is electrically connected with one end of a first voltage-dividing resistor, the other end of the first voltage-dividing resistor is electrically connected with one end of a second voltage-dividing resistor, and the other end of the second voltage-dividing resistor is electrically connected with the zero wire of the alternating current zero-crossing signal passage; the other end of the first divider resistor is electrically connected with the anode of a light emitting diode in the optical coupler device, and the cathode of the light emitting diode in the optical coupler device is electrically connected with the zero line of the alternating current zero-crossing signal path; one end of the current-limiting resistor is electrically connected with the direct-current power supply, the other end of the current-limiting resistor is electrically connected with a collector of the optocoupler, and an emitter of the optocoupler is electrically connected with the ground; and a collector of the optical coupler device outputs the alternating current zero-crossing detection signal.
6. The LED system with the AC zero-crossing signal path separated from the power supply path of claim 5,
the LED mode control circuit comprises a single chip microcomputer and a controllable switch, wherein one input end of the single chip microcomputer is electrically connected with a collector electrode of the optocoupler, and one output end of the single chip microcomputer is electrically connected with a control end of the controllable switch; the input end of the controllable switch is connected with the cathode of the LED lamp string, and the output end of the controllable switch is electrically connected with the ground; the power supply end of the singlechip is electrically connected with the direct-current power supply; and the ground end of the singlechip is connected with the ground.
7. The LED system with the separated AC zero-crossing signal path and the separated power supply path as claimed in claim 6, wherein the LED light string comprises a plurality of LED modules, the LED modules comprise LED driving chips, and the LED driving chips are triggered by edge signals to change the color mode of the LED modules.
8. The LED system with the AC zero-crossing signal path separated from the power supply path as set forth in claim 7, wherein the edge signal comprises a rising edge signal and a falling edge signal;
the controllable switch is switched on from cut-off, the anode of the LED lamp string and the cathode of the LED lamp string are equal in potential and unequal in potential, and the LED lamp string receives the rising edge signal; the controllable switch is switched on and off, the anode of the LED light string and the cathode of the LED light string are in equal potential from unequal potential to equal potential, and the LED light string receives the falling edge signal.
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| CN202020119537.0U CN211457444U (en) | 2020-01-19 | 2020-01-19 | LED system with alternating current zero-crossing signal path and power supply path separated |
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| CN202020119537.0U CN211457444U (en) | 2020-01-19 | 2020-01-19 | LED system with alternating current zero-crossing signal path and power supply path separated |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111148313A (en) * | 2020-01-19 | 2020-05-12 | 杭州昀芯光电科技有限公司 | LED system with alternating current zero-crossing signal path and power supply path separated |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111148313A (en) * | 2020-01-19 | 2020-05-12 | 杭州昀芯光电科技有限公司 | LED system with alternating current zero-crossing signal path and power supply path separated |
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