CN210298138U

CN210298138U - LED lamp control system

Info

Publication number: CN210298138U
Application number: CN201920331749.2U
Authority: CN
Inventors: 梁建冬
Original assignee: Individual
Current assignee: Huiyun Shidai Technology Shenzhen Co ltd
Priority date: 2018-06-08
Filing date: 2019-03-15
Publication date: 2020-04-10
Anticipated expiration: 2029-03-15

Abstract

The utility model discloses a LED lamp control system, including PDS unit, direct current positive pole line, direct current negative pole line and LED lamp, PDS unit is connected with the LED lamp through direct current positive pole line and direct current negative pole line, and PDS unit includes micro control unit, PDS direct current positive pole, PDS direct current negative pole and modulator, and micro control unit, PDS direct current positive pole, PDS direct current negative pole, direct current positive pole line and direct current negative pole line all are connected with the modulator; the utility model discloses the circuit structure has been simplified, only carry out electrical connection to PDS unit and LED lamp by the anodal line of direct current and direct current negative pole pair, and realize the PDS unit to LED lamp power supply with adjust luminance, mix colours, control signal's such as addressing transmission, and then provide a low cost, the power supply and the control signal transmission technique of the highly reliable LED lamps and lanterns that the engineering wiring is very convenient, and because light control signal is discontinuous to the modulation of the anodal and direct current negative pole of direct current, control signal transmission process can not make the luminous stroboscopic phenomenon that produces of LED lamps and lanterns.

Description

LED lamp control system

Technical Field

The utility model relates to a technical field is used to the balloon, specifically is a novel inflatable balloon.

Background

With the popularization of the new generation of LED lighting technology in various application fields, the LED light emission intensity can be adjusted by changing the forward current flowing through the LED lighting technology, so that the DALI dimming technology used in the conventional household and commercial architectural lighting and the DMX512 dimming technology used in the stage lighting and architectural landscape lighting are increasingly transplanted to the LED lighting application. Due to DALI dimming technology or DMX512 dimming technology, at least two wires need to be added to serve as a light control signal transmission carrier, and the wires cannot serve as an LED lamp power supply transmission carrier. In order to light the LED lamp, at least two other wires are connected to the LED lamp to supply power to the LED lamp. In addition, the DALI dimming technology and the DMX512 have strict requirements on cables and interface circuits for transmitting signals, and the system is complex, so that the cost of the LED lamp is high, and the wiring and engineering installation of the lamp are very complicated.

With the advance of the technology, a technology combining Pulse-Width Modulation (PWM) and power supply transmission appears in the market, and the dimming of the light and shade of the LED lamp is realized by changing the duty ratio of the power supply to the LED. The LED lamp has the limitations that the brightness of the LED lamp can be adjusted in real time by continuous PWM modulation of a direct current anode and a direct current cathode which are used as power supply transmission, and the brightness and the color of the LED lamp can not be adjusted respectively only by controlling the brightness of the light of the LED lamp. Because the continuous PWM signals have no addressing function, the LED lamps connected with the PWM dimming power supply cannot realize the addressing dimming function, all the LED lamps connected with the PWM dimming power supply can only keep the same brightness, and the illumination areas cannot be partitioned to realize different scene illumination control. In addition, since PWM is used as a dimming signal to synchronously control the duty ratio of the current flowing through the LED, the LED lamp emits light with a strobe having the same duty ratio and frequency as the PWM, and when the PWM frequency is low or the duty ratio is low, the strobe is more obvious, which seriously affects the lighting quality.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a LED lamp control system, in order to solve the problem that proposes among the background art.

In order to realize the purpose, the utility model provides a following technical scheme:

an LED lamp control system comprises a PDS unit, a direct-current positive line, a direct-current negative line and an LED lamp, wherein the PDS unit is connected with the LED lamp through the direct-current positive line and the direct-current negative line;

the micro-control unit comprises a power supply VCC, a ground terminal GND, a power supply decoupling capacitor C203, a micro-controller U204, a resistor R205, a resistor R206, a resistor R207 and an NPN triode V208; the modulator comprises a photocoupler V210, a resistor R211, a resistor R212, a resistor R213, a resistor R214, a resistor R218, a resistor R219, an NPN triode V215, a PNP triode V216, a power supply filter capacitor C221, a power supply filter capacitor C223, a power supply voltage stabilizing chip U222, a power supply VDD, a switch diode D217 and a power field effect transistor V220, wherein two ends of a power supply decoupling capacitor C203 are respectively connected to a power supply VCC and a GND, one end of the resistor R206 is connected with a light control signal output end of the microcontroller U204, the other end of the resistor R is connected with a base electrode of the NPN V208, one end of the resistor R207 is connected with a base electrode of the triode V208, the other end of the resistor R is connected with the GND, an emitter electrode of the NPN triode V208 is connected with the GND, a collector electrode is connected with a cathode electrode of a light emitting diode of the photocoupler V210, one end of the resistor R205 is connected with a power supply VCC, the other end, the input end and the common end of a power supply voltage stabilization chip U222 are respectively connected to a PDS direct current positive electrode and a PDS direct current negative electrode, the output end of the power supply voltage stabilization chip U222 is connected with a power supply VDD, two ends of a power supply filter capacitor C221 are respectively connected to the power supply VDD and the PDS direct current negative electrode, the PDS direct current positive electrode is connected with a direct current positive electrode wire, one end of a current limiting resistor R211 is connected to the power supply VDD, the other end of the current limiting resistor R is connected with a collector electrode of a triode in a photocoupler V210, a base electrode of an NPN triode V215 is connected with an emitter electrode of the triode in the photocoupler V210 and one end of a resistor R212, an emitter electrode of the NPN triode V215 and the other end of the resistor R212 are connected to the PDS direct current negative electrode, a collector electrode of the NPN triode V215 is connected with one end of a resistor R214, the other end of the resistor, the collector of the PNP triode V216 is connected with the anode of the switch diode D217, the cathode of the switch diode D217 is connected with one end of the resistor R218, the other end of the resistor R218 is connected with the grid of the power field effect transistor V220, the source of the field power field effect transistor V220 is connected with the direct current negative pole of the PDS, the drain of the power field effect transistor V220 is connected with the direct current negative pole line, and the resistor R219 is connected between the grid and the source of the power field effect transistor V220.

As a further aspect of the present invention: the LED lamp comprises an LED lamp direct current anode, an LED lamp direct current cathode, a demodulator and an LED driving and light-emitting module,

as a further aspect of the present invention: the direct current positive wire and the direct current negative wire, the direct current positive electrode of the LED lamp and the direct current negative electrode of the LED lamp are connected with the demodulator.

As a further aspect of the present invention: and the direct current carrier fluid is connected with the direct current positive line and the direct current negative line and modulated by the lamplight control signal, and the modulation of the direct current carrier fluid is discontinuous.

As a further aspect of the present invention: the PDS unit is connected with at least one LED lamp.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses the circuit structure has been simplified, only carry out electrical connection to PDS unit and LED lamp by the anodal line of direct current and direct current negative pole, and realize PDS unit to LED lamp power supply with adjust luminance, mix colours, control signal's such as addressing transmission, and then provide a low cost, the power supply and the control signal transmission technology of the highly reliable LED lamps and lanterns that engineering wiring is very convenient, and because light control signal is discontinuous to the anodal and direct current negative pole of direct current, control signal transmission process can not make the luminous stroboscopic phenomenon that produces of LED lamps and lanterns.

Drawings

Fig. 1 shows the overall architecture of an LED lamp control system of the present invention;

FIG. 2 shows a specific configuration of the PDS unit in FIG. 1 and its circuit implementation;

FIG. 3 shows a specific construction of the LED lamp in FIG. 1 and its circuit implementation;

fig. 4 shows an implementation of the light control signal transmission protocol discussed in fig. 1, 2 and 3, and a method for distinguishing between data bits "0" and "1".

In the figure: the LED driving and light-emitting module comprises a 1-PDS unit, a 2-direct current positive line, a 3-direct current negative line, a 4-LED lamp, a 5-micro control unit, a 6-PDS direct current positive electrode, a 7-PDS direct current negative electrode, an 8-modulator, a 9-LED lamp direct current positive electrode, a 10-LED lamp direct current negative electrode, an 11-demodulator and a 12-LED driving and light-emitting module.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1: referring to fig. 1, an LED lamp control system includes a PDS unit 1, a dc positive line 2, a dc negative line 3, and an LED lamp 4, where the PDS unit 1 is connected to the LED lamp 4 through the dc positive line 2 and the dc negative line 3, and the PDS unit 1 provides power supply and light control signals for the LED lamp 4 through the dc positive line 2 and the dc negative line 3. The PDS unit 1 further comprises a micro control unit 5, a PDS direct current positive electrode 6, a PDS direct current negative electrode 7 and a modulator 8, the micro control unit 5, the PDS direct current positive electrode 6 and the PDS direct current negative electrode 7 are connected with the modulator 8 through the direct current positive electrode line 2 and the direct current negative electrode line 3, and the micro control unit 5 modulates the PDS direct current positive electrode 6 and the PDS direct current negative electrode 7 and transmits the modulated PDS direct current positive electrode 6 and PDS direct current negative electrode 7 to the direct current positive electrode line 2 and the direct current negative electrode line 3. The LED lamp 4 further comprises an LED lamp direct current positive electrode 9, an LED lamp direct current negative electrode 10, a demodulator 11 and an LED driving and light emitting module 12, the direct current positive electrode line 2 and the direct current negative electrode line 3, the LED lamp direct current positive electrode 9 and the LED lamp direct current negative electrode 10 are connected with the demodulator 11, the demodulator 11 demodulates power and signals from the direct current positive electrode line 2 and the direct current negative electrode line 3 to generate an LED lamp direct current positive electrode 6, an LED lamp direct current negative electrode 7 and a light control signal, and the light control signal is output to the LED driving and light emitting module 12. The connected direct current positive wire 2 and direct current negative wire 3 are direct current carrier fluid modulated by the lamplight control signal, and the modulation is discontinuous.

Fig. 2 shows a specific configuration of the PDS unit 1 in fig. 1 and its circuit implementation. The micro control unit (5) of the PDS1 unit (1) comprises a power supply VCC, a ground terminal GND, a power supply decoupling capacitor C203, a microcontroller U204, a light lamp control signal output terminal, a resistor R205, a resistor R206, a resistor R207 and an NPN triode V208; the modulator (8) of the PDS1 unit 1 comprises a photoelectric coupler V210, a resistor R211, a resistor R212, a resistor R213, a resistor R214, a resistor R218, a resistor R219, an NPN transistor V215, a PNP transistor V216, a power supply filter capacitor C221, a power supply filter capacitor C223, a power supply voltage stabilizing chip U222, a power supply VDD, a switch diode D217 and a power field effect transistor V220, wherein the photoelectric coupler V210 is composed of a light emitting diode and an NPN transistor, and the base electrodes of the transistors are controlled by the light emitting diode.

The two ends of the power decoupling capacitor C203 are respectively connected to the power VCC and the ground GND, and form a power supply circuit to provide a working power supply for the related circuits of the micro control unit 5. One end of the resistor R206 is connected with the light control signal output end of the microcontroller U204, and the other end is connected with the base of the NPN triode V208. One end of the resistor R207 is connected to the base of the transistor V208, and the other end is connected to the ground GND. The emitter of the NPN transistor V208 is connected to the ground GND, and the collector is connected to the cathode of the light emitting diode of the photocoupler V210 of the modulator 8. One end of the resistor R205 is connected to the power source VCC, and the other end is connected to the anode of the light emitting diode of the photocoupler V210 of the modulator 8.

Two ends of the power supply filter capacitor C223 are respectively connected to the PDS direct current positive electrode 6 and the PDS direct current negative electrode 7. The input end and the common end of the power supply voltage stabilization chip U222 are respectively connected to the PDS direct current anode 6 and the PDS direct current cathode 7, and the output end of the power supply voltage stabilization chip U222 is connected with the power supply VDD of the modulator 8. Two ends of the power filter capacitor C221 are connected to the power VDD and the PDS dc negative electrode 7, respectively. The PDS direct current positive electrode 6 is connected with the direct current positive electrode line 2. One end of the current limiting resistor R211 is connected to VDD, and the other end is connected to the collector of the photocoupler V210. The base of the NPN triode V215 is connected to the emitter of the photocoupler V210 and one end of the resistor R212, the emitter of the NPN triode V215 is connected to the PDS dc negative electrode 7 together with the other end of the resistor R212, and the collector of the NPN triode V215 is connected to one end of the resistor R214. The other end of the resistor R214 and the resistor R213 are connected to the base of the PNP triode V216, the other end of the resistor R213 and the emitter of the PNP triode V216 are connected to the power supply VDD, and the collector of the PNP triode V216 is connected to the anode of the switching diode D217. The cathode of the switch diode D217 is connected with one end of the resistor R218, the other end of the resistor R218 is connected with the grid of the power field effect transistor V220, the source of the field power field effect transistor V220 is connected with the PDS direct current cathode 7, and the drain of the power field effect transistor V220 is connected with the direct current cathode line 3. The resistor R219 is connected between the gate and source of the power fet V220.

The light control signal generated by the microcontroller U204 is connected to a current excitation circuit composed of a resistor R206, a resistor R207 and an NPN transistor V208 from the light control signal output terminal to perform current excitation on the light emitting diode of the optocoupler V210, and the excitation current is limited by the resistor R205. The resistor R211 and the resistor R212 are combined with the photocoupler V210 to form an electro-optic-electrical converter, so as to transmit the light control signal from the micro control unit 5 to the modulator 8, and perform the function of mutual isolation. The resistor R213, the resistor R214, the NPN triode V215, the PNP triode V216, the switch diode D217, the resistor R218 and the resistor R219 form a power field effect transistor driving circuit, and the power field effect transistor V220 is driven to realize the connection and disconnection of the direct current negative wire 3 and the PDS direct current negative electrode 7 under the control of a light control signal generated by the microcontroller U204. Specifically, when the light control signal output terminal of the microcontroller U204 is at a high level, the NPN transistor V208 is driven through the resistor R206 to make the collector and the emitter of the NPN transistor V208 in a conducting state, so that a current flows through the light emitting diode of the photocoupler V210, and therefore, the collector and the emitter of the photocoupler V210 are also in a conducting state, and a forward bias current is injected into the base of the NPN transistor V215 through the resistor R211 to make the collector and the emitter thereof conducting. When the collector and the emitter of the NPN transistor V215 are turned on, a forward current flows through the emitter and the base of the PNP transistor V216 and the resistor R214, and the PNP transistor V216 obtains a forward bias to turn on the emitter and the collector thereof. At this time, VDD applies a forward voltage to the gate and the source of the power fet V220 through the emitter and the collector of the PNP transistor V216, the switching diode D217, and the resistor R216, and the power fet V220 is turned on, that is, the source and the drain thereof are turned on, that is, the dc negative line 3 is turned on with the PDS dc negative electrode 7. On the contrary, when the light control signal output end of the microcontroller U204 is at a low level, no current flows through the base of the NPN transistor V208, the NPN transistor V208 is in a cut-off state, the emitter and the collector of the NPN transistor V208 are disconnected, and no current flows through the light emitting diode of the photocoupler V210, and the collector and the emitter of the photocoupler are also disconnected. The base and the emitter of the NPN transistor V215 are connected to a resistor R212 to keep the same potential, the NPN transistor V215 is in an off state, and the base electric collector and the emitter are disconnected. At this time, the resistor R213 between the base and the emitter of the PNP transistor V216 keeps the same potential between the base and the emitter of the PNP transistor V216 and turns off, and the emitter and the collector of the PNP transistor V216 are in a disconnected state. The resistor R219 connected to the gate and the source of the power fet V220 will keep the gate and the source of the power fet V220 at the same potential, and the power fet V220 is turned off, i.e. the source and the drain are disconnected, i.e. the dc negative line 3 is disconnected from the PDS dc negative electrode 7. In short, when the light control signal of the microcontroller U204 is at a high level, the dc negative line 3 is connected to the PDS dc negative electrode 7; on the contrary, when the light control signal of the microcontroller U204 is low, the dc negative line 3 is disconnected from the PDS dc negative electrode 7. When the PDS unit 1 is in non-lamplight control signal transmission, the lamplight control signal of the microcontroller U204 is kept at high level, the direct current negative electrode line 3 is communicated with the PDS direct current negative electrode 7, and the PDS unit 1 supplies power to the LED lamp 4 through the direct current positive electrode line 2 and the direct current negative electrode line 3; when the light control signal is transmitted at the PDS unit 1, the level of the light control signal of the microcontroller U204 changes, so that the dc negative line 3 and the PDS dc negative electrode 7 are correspondingly turned on or off, and the PDS unit 1 provides the light control signal to the LED lamp 4 in a manner that the dc negative line 3 and the PDS dc negative electrode 7 are correspondingly turned on or off, in other words, the microcontroller 5 modulates the PDS dc positive electrode 6 and the PDS dc negative electrode 7, and then provides the light control signal to the LED lamp 4 through the dc positive line 2 and the dc negative line 3.

Example 2, on the basis of example 1, fig. 3 shows a specific configuration of the LED lamp 4 in fig. 1 and a circuit implementation thereof. The demodulator 11 of the LED lamp 4 includes a diode D301, a diode D305, a zener diode D304, a resistor R302, a resistor R303, a power filter capacitor C306, a power filter capacitor C308, a power regulator chip U307, a power supply V +, and a microcontroller U311. The microcontroller U311 is provided with a light control signal detection terminal and multiple channel selectable PWM dimming signal output terminals, such as a channel 1 PWM output terminal, a channel 2 PWM output terminal, a channel 3 PWM output terminal, and a channel n PWM output terminal. The LED driving and light emitting module 12 may be configured with a plurality of LED driving and light emitting modules, and fig. 3 shows a circuit implementation scheme of dimming and color mixing, in which the LED driving and light emitting module 12 is composed of an LED driving and light emitting module and an LED driving and light emitting module. The LED driving and light-emitting module comprises an LED lamp constant current driving controller U316, an LED current sampling resistor R317, a freewheeling diode D318, a power inductor L319 and an LED string LED 1; the LED driving and light emitting module comprises an LED lamp constant current driving controller U322, an LED current sampling resistor R323, a freewheeling diode D324, a power inductor L325 and an LED string LED 2.

The DC negative electrode 10 of the LED lamp is connected with the DC negative electrode line 3. The anode and the cathode of the diode D305 are connected to the dc positive line 2 and the dc positive electrode 9 of the LED lamp, respectively, and the dc positive electrode 9 and the dc negative electrode 10 of the LED lamp provide working power for the demodulator 11 and the related circuits of the LED driving and light emitting module 12. The filter capacitor C306 is connected between the LED lamp dc positive electrode 9 and the LED lamp dc negative electrode 10. The input end and the common end of a power supply voltage stabilization chip U307 are respectively connected to an LED lamp direct current anode 9 and an LED lamp direct current cathode 10, the output end of the power supply voltage stabilization chip U307 is connected with a power supply end V + of a demodulator 11 of an LED lamp 4, two ends of a power supply filter capacitor C308 are respectively connected with the power supply end V + and the LED lamp direct current cathode 10, and the power supply end V + provides power for the work of a microcontroller U311, an LED lamp constant current driving controller U316, an LED lamp constant current driving controller U322 and auxiliary circuits thereof. The anode of the diode D301 is connected with the direct current positive line 2, the cathode of the diode D301 is connected with one end of the resistor R302, the other end of the resistor R302 is connected with the cathode of the voltage stabilizing diode D304, the anode of the voltage stabilizing diode D304 is connected with the direct current negative pole 10 of the LED lamp, and the resistor R303 and the voltage stabilizing diode D304 are connected together in parallel. The light control signal detection end of the microcontroller U311 is connected with the cathode of the voltage stabilizing diode D304. The PWM output end of the channel 1 and the PWM output end of the channel 2 of the microcontroller U311 are respectively connected with the PWM dimming control input ends of the LED lamp constant current driving controller U316 and the LED lamp constant current driving controller U322. The LED lamp constant current driving controller U316 and the LED lamp constant current driving controller U322 are integrated with a power field effect switch tube, one end of an LED current sampling resistor R317 is connected with the DC negative electrode 10 of the LED lamp, the other end of the LED current sampling resistor R317 is connected with the source electrode of the power field effect switch tube arranged in the LED lamp constant current driving controller U316, one end of the LED current sampling resistor R323 is connected with the DC negative electrode 10 of the LED lamp, and the other end of the LED current sampling resistor R323 is connected with the source electrode of the power field effect switch tube arranged in the LED lamp constant current driving controller U322. The drain output end of a power field effect switching tube arranged in the LED lamp constant current driving controller U316 is connected with the anode of a fly-wheel diode D318. The cathode of the freewheeling diode D318 and the anode of the LED string LED1 are connected to the dc positive electrode 9 of the LED lamp, and the two ends of the power inductor L319 are connected to the anode of the freewheeling diode D318 and the cathode of the LED string LED1, respectively. The drain output end of a power field effect switching tube arranged in the LED lamp constant current driving controller U322 is connected with the anode of a fly-wheel diode D324. The cathode of the freewheeling diode D324 and the anode of the LED string are connected to the dc positive electrode 9 of the LED lamp, and the two ends of the power inductor L325 are connected to the anode of the freewheeling diode D324 and the cathode of the LED string LED2, respectively.

When the direct-current negative line 3 of the PDS unit 1 is connected with the direct-current negative electrode 7 of the PDS, at this time, the PDS direct-current positive electrode 6 and the PDS direct-current negative electrode 7 of the PDS unit 1 are connected to the LED lamp 4 through the direct-current positive line 2 and the direct-current negative line 3, the diode D305 is in forward bias conduction to provide power for the LED lamp 4, meanwhile, the filter capacitor C306 is charged, and the filter capacitor C306 obtains energy storage. When the direct-current negative line 3 of the PDS unit 1 and the direct-current negative electrode 7 of the PDS unit 1 are temporarily disconnected, the diode D305 in the LED lamp 4 is reversely biased to prevent the filter capacitor C306 from discharging to an external circuit, and at this time, the charges stored in the filter capacitor C306 continuously maintain the supply of the working power to the demodulator 11 and the related circuits of the LED driving and light emitting module 12 in the LED lamp 4, when the direct-current negative line 3 of the PDS unit 1 and the direct-current negative electrode 7 of the PDS unit 7 are connected again, the PDS direct-current positive electrode 6 and the PDS direct-current negative electrode 7 of the PDS unit 1 are powered on and restored to the LED lamp 4, and at the same time, the filter capacitor C306 is charged, and the filter capacitor C306 stores energy again to maintain the supply of the power to the LED lamp 4 when the direct-current negative line 3 of the PDS unit 1. The diode D301, the resistor R302, the resistor R303 and the voltage stabilizing diode D304 form a light control signal detection circuit, when a light control signal of the microcontroller U204 is at a high level, the direct current negative electrode line 3 is communicated with the PDS direct current negative electrode 7, the PDS direct current positive electrode 6 and the PDS direct current negative electrode 7 of the PDS unit 1 are communicated with the LED lamp 4 through the direct current positive electrode line 2 and the direct current negative electrode line 3, at the moment, the diode D301 is conducted in a forward bias mode, the two ends of the resistor R303 are divided, meanwhile, the light control signal detection end of the microcontroller U311 obtains a high level signal, and due to the existence of the current limiting resistor R302 and the parallel connection of the voltage stabilizing diode D304 and the resistor R303, the high level is limited within an acceptable range of the microcontroller U311; when the light control signal of the microcontroller U204 is low, the dc negative line 3 is disconnected from the dc negative electrode 7 of the PDS, and the filter capacitor C306 stores charges, which cannot discharge the diode D301, the resistor R302, the resistor R303, and the zener diode D304 due to the reverse bias of the diode D305. The resistor R303 pulls the potential of the light control signal detection end of the microcontroller U311 to be equal to the DC negative electrode 10 of the LED lamp, namely, the light control signal detection end obtains a low level signal. In short, the level signal picked up by the light control signal detection terminal of the microcontroller U311 is consistent with the light control signal of the microcontroller U204. The level signal picked up by the light control signal detection end is demodulated by the microcontroller U311 internal program according to the agreed light control data transmission protocol to obtain the relevant light control data, such as color, brightness, address and other control information. And the microcontroller U311 identifies and performs operation processing on the information, converts the information into one or more groups of PWM dimming control signals, and outputs PWM dimming signals from corresponding PWM output terminals, for example, the PWM output terminal of the channel 1, the PWM output terminal of the channel 2, the PWM output terminal of the channel 3, and the PWM output terminal of the channel n are connected to corresponding PWM dimming signal input terminals of the LED driving and light emitting module to control light emission. After the microcontroller U311 responds to the latest received light control information with corresponding light control, the LED driver and the light emitting module 12 are kept in the current state until different light control information is received from the PDS unit 1. As shown in fig. 3, two LED constant current driving and light emitting modules with PWM dimming are provided, which are an LED driving and light emitting module and an LED driving and light emitting module, respectively. The light emission of the LED driving and light emitting module is controlled by the PWM output terminal of channel 1 of the microcontroller U311, and the light emission of the LED driving and light emitting module is controlled by the PWM output terminal of channel 2 of the microcontroller U311.

Fig. 4 shows an implementation of the light control signal transmission protocol discussed in fig. 1, 2 and 3, and a method of distinguishing between data bits "0" and "1"; the given time sequence defines the control rule of the light control signal of the microcontroller U204 of the PDS unit 1 to switch on and off the dc negative line 3 and the PDS dc negative 7, i.e. the data transfer protocol, and the basis of the LED lamp 4 to demodulate, identify and process the light control signal.

The data transmission adopts an asynchronous serial format, and at most 256 fields containing 8 bits of data can be transmitted. The first field, field 0414, before transmission, preamble sequence 412 should be sent to include short preamble 401 and long preamble 402. The field 403 contains a field start bit 404, a field stop bit 407 of field data 417 of 8 data bits, the data bits in the field, the upper bits preceding and the lower bits following, i.e. the highest data bit 405 of the field is transmitted first, and the lowest data bit 406 is transmitted last. After all the fields are sent, an end short code 408 and an end long code 409 are set, the data packet 413 comprises a preamble sequence 412 and all the fields 403, the preamble interval 411 comprises the data packet 413, the end short code 408 and the end long code 409, and a data transmission interval 410 is set between the preamble intervals 411. The system frequency of the operating clock of the microcontroller U204 of the PDS unit 1 is f, and given a division factor d, a duration unit a is obtained as d/f, and as the minimum unit of the time sequence duration, there are: the duration of the short lead code 401 is 6a, the duration of the long lead code 402 is 40a, the duration of the field 403 is 73-105 a, the duration of the field start bit 404 is a, the duration of the field stop bit 407 is 40a, the duration of the end short code 408 is a, the duration of the end long code 409 is 80a, the duration of the data transmission interval 410 is greater than 40a, the duration of the lead code interval 411 is greater than 199a, and the duration of the lead code sequence 412 is 46 a. Data bit "0" 418 is made up of a high portion 421 of data bit "0" and a low portion 422 of data bit "0"; the data bit "1" 419 is composed of a high portion 423 of the data bit "1" and a low portion 424 of the data bit "1". The duration of data bit "0" 418 is 4a, wherein the duration of the high portion 421 of data bit "0" is 3a, and the duration of the low portion 422 of data bit "0" is a; data bit "1" 419 is 8a long, wherein the high portion 423 of data bit "1" is 7a long and the low portion 424 of data bit "1" is a long. The method for distinguishing the data bit '0' bit from the data bit '1' bit by adopting the same short low-level time length and different high-level time lengths not only ensures that the signal has high reliability in the transmission process, but also ensures that the time sequence ratio of the low-level signal in a complete field 420 containing 8-bit data and the whole data transmission protocol is very low, namely, when the PDS unit 1 transmits the light control signal to the LED lamp 4, the disconnection time of the negative electrode wire 3 and the PDS direct current negative electrode 7 is very short, and the ratio of the relative on-time length is also very low, so that the dependence on the energy storage capacity of the filter capacitor C306 is reduced when the LED lamp 4 works, and the normal work of the small-capacity filter capacitor with lower cost can be maintained. In addition, since the durations of all timing units in the transmission protocol of the light control signal are integral multiples of the minimum duration a, and a can be flexibly adjusted by changing the system frequency f or the frequency division factor d of the operating clock of the microcontroller U204 of the PDS unit 1. Therefore, when the PDS unit 1 is applied to power supply to the LED lamp 4 and transmission of light control signals such as dimming, color modulation, and addressing, it is easy to balance long-distance transmission and high-speed transmission.

The utility model discloses a theory of operation is:

example 1: the LED lamps and lanterns that use in this example all adopt the utility model relates to a technical scheme of LED lamp control system to all be connected to PDS (Power-Data supply) unit 1 through direct current positive pole line 2 and direct current negative pole line 3, every lamp all can be by PDS unit 1 distribution address and control light to addressing it, do to constitute the function lighting group at the regional LED lamp of same ability, PDS unit 1 can be and control light to it is grouped. After the LED lamp 4 receives the latest light control information transmitted by the PDS unit 1 and makes corresponding light control response, the light keeps the current state, and corresponding light control adjustment is not made until different light control information is received from the PDS unit 1. Therefore, the PDS unit 1 is not required to control the light emission of the LED lamps in real time, and the method for discontinuously modulating the light control signals of the direct current positive line 2 and the direct current negative line 3 makes the amount of light control information transmitted by the direct current positive line 2 and the direct current negative line 3 not restricted by real-time dimming in a PWM dimming scheme, so as to implement addressing dimming and color mixing of a plurality of LED lamps 4 connected with the PDS unit 1.

Lighting designs are now implemented for different functional areas, including staff offices, meeting areas, small bar areas, aisles, etc., in an open office area. The lamp installation requirements are as follows: the office area is provided with 10 office tables, and 1 LED panel lamp A with adjustable color temperature and brightness is respectively arranged on the ceiling corresponding to each office table top; a conference table is arranged in the conference area, and 2 LED panel lamps A with adjustable color temperature and brightness and 3 LED down lamps B with adjustable brightness are required to be installed; 6 LED ceiling lamps C with adjustable colors and brightness are arranged in the small bar counter area; the aisle ceiling is provided with 5 LED down lamps D with adjustable color temperature and brightness.

And after the demodulators in the LED panel lamp A and the LED down lamp D with adjustable color temperature and brightness receive power supply and light control signals transmitted by the PDS unit and demodulate the power supply and light control signals, the address is checked to be consistent with the pre-distributed address, and then the two groups of light-emitting modules with different color temperatures are subjected to dimming and color mixing to realize the adjustment of the brightness and the color temperature. Similarly, after a demodulator in the LED down lamp C receives a power supply and a light control signal transmitted by the PDS unit and demodulates the power supply and the light control signal, the address is checked to be consistent with the pre-distributed address, and then the light-emitting module in the lamp is adjusted in light to realize brightness adjustment; and after a demodulator in the LED ceiling lamp C with adjustable color and brightness receives a power supply and light control signal transmitted by the PDS unit and demodulates the power supply and light control signal, the address is checked to be consistent with the pre-distributed address, and then the light-adjusting and color-mixing of three groups of light-emitting modules with different colors is carried out on the lamp so as to realize the adjustment of the brightness and the color. When the PDS unit is provided with the control panel, the light emitting of the LED lamp connected with the PDS unit can be operated and controlled by the control panel; when the PDS unit is connected with the light cloud controller, the light emitting of the LED lamp can be controlled through the APP of the application end. For example, office staff can conveniently use the APP at the application end to adjust the color temperature and the brightness of the light on the office desk where the office staff is located, and even turn off the light; when a conference is started in a conference area, the illumination brightness or the color temperature can be adjusted according to the requirements of a conference site, and certain LED lamps are turned on or off; the color temperature and brightness of the LED lamp in the aisle area can be set by the APP, for example, the LED lamp simulates the manufacturing of a daylight cycle as the effect of changing the illumination from sunrise to sunset; the LED lamp on the bar counter can adjust the luminous color and brightness according to the atmosphere requirement.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. An LED lamp control system comprises a PDS unit (1), a direct-current positive wire (2), a direct-current negative wire (3) and an LED lamp (4), wherein the PDS unit (1) is connected with the LED lamp (4) through the direct-current positive wire (2) and the direct-current negative wire (3), the PDS unit (1) comprises a micro control unit (5), a PDS direct-current positive electrode (6), a PDS direct-current negative electrode (7) and a modulator (8), and the LED lamp control system is characterized in that the micro control unit (5), the PDS direct-current positive electrode (6), the PDS direct-current negative electrode (7), the direct-current positive wire (2) and the direct-current negative wire (3) are all connected with the modulator (8);

the micro-control unit (5) comprises a power supply VCC, a ground terminal GND, a power supply decoupling capacitor C203, a micro-controller U204, a resistor R205, a resistor R206, a resistor R207 and an NPN triode V208; the modulator (8) comprises a photocoupler V210, a resistor R211, a resistor R212, a resistor R213, a resistor R214, a resistor R218, a resistor R219, an NPN triode V215, a PNP triode V216, a power supply filter capacitor C221, a power supply filter capacitor C223, a power supply voltage stabilizing chip U222, a power supply VDD, a switch diode D217 and a power field effect transistor V220, wherein two ends of the power supply decoupling capacitor C203 are respectively connected to a power supply VCC and a ground terminal GND, one end of the resistor R206 is connected with a lamplight control signal output end of the microcontroller U204, the other end of the resistor R is connected with a base electrode of the NPN triode V208, one end of the resistor R207 is connected with the base electrode of the triode V208, the other end of the resistor is connected to the ground terminal GND, an emitter electrode of the NPN triode V208 is connected to the ground terminal GND, a collector electrode is connected with a cathode electrode of a light emitting diode of the photocoupler V210, one end of the resistor R205 is connected to the power supply VCC, the other, the input end and the common end of a power supply voltage stabilization chip U222 are respectively connected to a PDS direct current positive electrode (6) and a PDS direct current negative electrode (7), the output end of the power supply voltage stabilization chip U222 is connected with a power supply VDD, two ends of a power supply filter capacitor C221 are respectively connected to the power supply VDD and the PDS direct current negative electrode (7), the PDS direct current positive electrode (6) is connected with a direct current positive electrode wire (2), one end of a current limiting resistor R211 is connected to the power supply VDD, the other end of the current limiting resistor R is connected with a collector electrode of a triode in a photocoupler V210, a base electrode of an NPN triode V215 is connected with an emitter electrode of the triode in the photocoupler V210 and one end of a resistor R212, an emitter electrode of the NPN triode V215 is connected with the other end of the resistor R212 to the PDS direct current negative electrode (7), a collector electrode of the NPN triode V215 is connected with one end of a resistor R214, the other end of the resistor R, the collector of the PNP triode V216 is connected with the anode of a switch diode D217, the cathode of the switch diode D217 is connected with one end of a resistor R218, the other end of the resistor R218 is connected with the grid of a power field effect transistor V220, the source of the field power field effect transistor V220 is connected with a PDS direct current cathode (7), the drain of the power field effect transistor V220 is connected with a direct current cathode line (3), and a resistor R219 is connected between the grid and the source of the power field effect transistor V220.

2. An LED lamp control system according to claim 1, characterized in that the LED lamp (4) comprises an LED lamp DC positive electrode (9), an LED lamp DC negative electrode (10), a demodulator (11) and an LED driving and light emitting module (12).

3. An LED lamp control system according to claim 1, characterized in that the DC positive line (2) and DC negative line (3), the DC positive LED lamp (9) and the DC negative LED lamp (10) are connected to the demodulator (11).

4. An LED lamp control system according to claim 3, characterized in that the PDS unit (1) is connected to at least one LED lamp (4).

5. An LED lamp control system according to any of claims 1-4, characterized in that the dc carrier fluid, which is connected to the positive dc line (2) and the negative dc line (3) and modulated by the lamp control signal, is modulated non-continuously.