CN104363980A - LED driving device, driving method and LED lamp - Google Patents
LED driving device, driving method and LED lamp Download PDFInfo
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- CN104363980A CN104363980A CN201380026512.9A CN201380026512A CN104363980A CN 104363980 A CN104363980 A CN 104363980A CN 201380026512 A CN201380026512 A CN 201380026512A CN 104363980 A CN104363980 A CN 104363980A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000004891 communication Methods 0.000 claims abstract description 5
- 238000012545 processing Methods 0.000 claims description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000006698 induction Effects 0.000 description 16
- 238000010586 diagram Methods 0.000 description 13
- 239000003990 capacitor Substances 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/175—Controlling the light source by remote control
- H05B47/19—Controlling the light source by remote control via wireless transmission
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/382—Switched mode power supply [SMPS] with galvanic isolation between input and output
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Led Devices (AREA)
Abstract
The invention discloses an LED driving device, an LED lamp and an LED driving method. The LED driving device comprises a wireless receiving module and an LED driving module,both of which are in communication connection via a digital interface. The wireless receiving module comprises a main control module and an awakening module which are connected with each other. The awakening module emits a sleep/awakening control signal such that the main control module operates between a sleep mode and an awakening mode according to pre-set time intervals. The main control module is used for searching whether a control instruction is obtained or not in the awakening mode. If a digital control signal is emitted and transmitted to the LED driving module. The LED driving module comprises a latch unit and produces driving current and / electric voltage to an LED lamp bank. The LED driving device, the LED lamp and the LED driving method have following beneficial effects: the wireless receiving module is in the sleep mode for a long time and switches only between the sleep mode and the awakening mode according to pre-set time intervals; and when the wireless receiving module is in the sleep mode is in the sleep mode, high temperature generated by the LED lamp bank does not affect service liftime of the wirless receiving module, thereby prolonging service liftime of the LED driving device.
Description
Technical Field
The invention relates to the technical field of LEDs, in particular to an LED driving device, a driving method and an LED lamp.
Background
Under the global development trend of low carbon, green and environmental protection, the application field of LED products is gradually expanded along with the continuous progress of LED technology. Meanwhile, the intelligent LED lighting is gradually accepted by people along with the popularization of the LED. In LED intelligent lighting products, it has become a trend to utilize digital communication means such as WiFi, Zigbee, bluetooth, etc. to realize lighting control.
The LED control part of the intelligent lighting mainly relates to the on/off control of the LED and the dimming technology. In the prior art, no matter single-color dimming or multi-color (or mixed-color) dimming is performed, a control chip is adopted to output a PWM signal, and an LED driving chip adjusts an output current and/or voltage for driving an LED according to an output waveform of the PWM.
In LED lighting applications, the driving power source is often the bottleneck of the lifetime of the LED lighting device. This is mainly due to the high operating temperature of LED lighting devices, approaching the operating limits of general electronic devices and chips. Under the circumstance, more complex digital communication modules such as WiFi, Zigbee and Bluetooth are added, and the reliability and the service life of the whole scheme are further reduced.
Fig. 1 is a schematic structural diagram of a prior art LED driving apparatus. In the conventional LED driving apparatus, the wireless receiving module 100 receives an external control command and generates a PWM signal, and outputs the PWM signal to the LED driving module 140, and the LED driving module 140 receives the PWM signal as an input control signal to implement dimming driving of the LED lamp set 150. The duty ratio of the PWM signal corresponds to the average current or voltage intensity of the LED driving module 140 driving the LED lamp set 150, thereby achieving the purpose of dimming. Therefore, after receiving the control command, the wireless receiving module 100 outputs the PWM signal to the LED driving module 140 through the analog interface 120, and the PWM signal needs to be maintained in real time.
As shown in fig. 10, which is a driving method of an LED driving apparatus in the prior art, referring to fig. 1, it can be seen that in the prior art, after receiving a control instruction, a wireless receiving module 100 outputs a PWM signal to control an LED driving module 140, and the LED driving module 140 adjusts a current or a voltage of an LED lamp set 150 according to the PWM signal. Since the PWM signal must exist in real time, the wireless receiving module 100 must be in an operating state all the time, which will result in a reduction in the lifetime of the LED driving device.
Disclosure of Invention
The present invention provides an improved LED driving apparatus, driving method and LED lamp, aiming at the defects of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: the LED driving device comprises a wireless receiving module and an LED driving module, wherein the wireless receiving module is in communication connection with the LED driving module through a digital interface; wherein,
the wireless receiving module comprises a main control module and a wake-up module;
the wake-up module is connected with the main control module and sends a sleep/wake-up control signal to the main control module, so that the main control module works in a sleep mode and a wake-up mode according to a preset time interval; the main control module checks whether a control instruction is received or not in the wake-up mode, and if so, generates a corresponding digital control signal according to the control instruction and sends the digital control signal to the LED driving module;
the LED driving module comprises a latch unit for latching the digital control signal, and the digital control signal latched by the LED driving module generates driving current and/or voltage to supply to the LED lamp group.
According to the LED driving device, the latch unit is an AC/DC chip, the LED driving module further comprises a driving circuit, and the AC/DC chip receives and latches the digital control signal from the main control module and controls the amplitude of the output current and/or voltage of the driving circuit according to the digital control signal, so that the light emitting state of the LED lamp group is controlled.
According to the LED driving device, the latch unit is a PWM generator, and the LED driving module further comprises a switch circuit and a driving circuit; the PWM generator receives and latches the digital control signal from the main control module and generates a PWM control signal according to the latched digital control signal; the switch circuit converts the current and/or voltage output by the driving circuit into driving current and/or voltage according to the PWM control signal and outputs the driving current and/or voltage to the LED lamp group.
An LED lamp comprises an LED driving device and an LED lamp group connected with the LED driving device.
An LED driving method comprising:
the main control module in the wireless receiving module works in a sleep mode and an awakening mode according to a preset time interval; the main control module does not perform any processing in the sleep mode, checks whether a control instruction is received or not in the wake-up mode, and generates a corresponding digital control signal according to the control instruction and sends the digital control signal to the LED driving module if the control instruction is received;
the LED driving module receives and latches the digital control signal, and generates driving current and/or voltage according to the latched digital control signal to supply to the LED lamp group.
According to the LED driving method, when the main control module is in the wake-up mode, if the main control module finds that the control instruction is not received, no processing is performed, and the main control module enters the sleep mode after a preset time interval.
The beneficial effects of the implementation of the invention are as follows: the wireless receiving module is in the sleep state for a long time, only switches between the sleep mode and the awakening mode according to the preset time interval, outputs the digital control signal to the LED driving module through the digital interface, and then enters the sleep state. When the wireless receiving module does not work, the high temperature generated by the LED lamp set cannot influence the service life of the wireless receiving module, so that the service life of the LED driving device is greatly prolonged.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a block diagram of a prior art LED driver;
FIG. 2 is a schematic block diagram of an LED driver of the present invention;
FIG. 3 is a schematic diagram of the internal modules of the wireless receiving module and the LED driving module in the LED driving device according to the present invention;
FIG. 4 is a timing diagram illustrating a wake-up mode and a sleep mode in the LED driving apparatus according to the present invention;
FIG. 5 is a schematic diagram showing a module of an LED driving apparatus according to a first embodiment of the present invention;
FIG. 6 is a circuit diagram of an LED driving apparatus according to a first embodiment of the present invention;
FIG. 7 is a schematic waveform diagram of an AC/DC chip controlling an output current or voltage according to a first embodiment of the LED driving apparatus of the present invention;
FIG. 8 is a schematic diagram showing a module of a second embodiment of the LED driving apparatus of the present invention;
FIG. 9 is a circuit diagram of a second embodiment of the LED driving apparatus of the present invention;
FIG. 10 is a flow chart illustrating a prior art LED driving method;
fig. 11 is a flow chart of the LED driving method of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 2, the present invention contemplates an LED driving apparatus for controlling the lighting state of an LED lamp set 150 according to a control command issued by a user, comprising a wireless receiving module 100 for receiving the control command and an LED driving module 140 for controlling the lighting state of the LED lamp set 150, which are connected via a digital interface 124.
The wireless receiving module 100 is configured to generate a digital control signal according to the received control instruction, and send the digital control signal to the LED driving module 140 through the digital interface 124.
As shown in fig. 3, the wireless receiving module 100 includes a main control module 101 and a wake-up module 102. The wake-up module 102 is connected to the main control module 101 and sends a sleep/wake-up control signal to the main control module 101, so that the main control module 101 operates in a sleep mode and a wake-up mode at predetermined time intervals. In the wake-up mode, the main control module 101 checks whether a control instruction is received, and if so, generates a corresponding digital control signal according to the control instruction and sends the digital control signal to the LED driving module 140; if not, the main control module 101 enters the sleep mode.
The LED driving module 140 includes a latch unit for latching the digital control signal. The LED driving module 140 generates a driving current and/or voltage according to the latched digital control signal to supply to the LED lamp set 150 to control a lighting state of the LED lamp set 150.
As shown in fig. 4, which is a time diagram of the awake mode and the sleep mode, the main control module 101 operates in the sleep mode and the awake mode at predetermined time intervals, and it can be seen that the time T1 when the main control module 101 is in the awake mode is much shorter than the time T2 when the main control module is in the sleep mode.
Two embodiments of the LED driving apparatus according to the present invention will be described below with reference to fig. 5 to 9.
As shown in fig. 5, in the first embodiment of the present invention, the latch unit is an AC/DC chip 241. The LED driving module 140 further includes a driving circuit 141, and the AC/DC chip 241 receives and latches the digital control signal from the main control module 101, and controls the amplitude of the output current and/or voltage of the driving circuit 141 according to the digital control signal, so as to control the light emitting state of the LED lamp set 150.
Fig. 6 is a diagram showing a connection relationship between the AC/DC chip 241 and the driving circuit 141 in this embodiment.
The driving circuit 141 includes an electromagnetic interference filter, a rectifying circuit, a resistor R2, a resistor R3, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R10, a resistor R11, a resistor R15, a capacitor C2, a capacitor C3, a capacitor C5, a capacitor C6, a diode D5, a diode D6, a diode D7, a magnetic induction coil 271, a magnetic induction coil 272, a magnetic induction coil 273, and a MOS transistor M1.
The input end of the electromagnetic interference filter is connected with an alternating voltage. It will be appreciated that the ac input voltage is 85V-265V.
The rectifying circuit is a bridge rectifying circuit consisting of a diode D1, a diode D2, a diode D3 and a diode D4. The first end of the resistor R10 is connected with the output end of the rectifying circuit, the second end is connected with the first end of the resistor R11, and the second end of the resistor R11 is grounded.
The first end of the resistor R5 is connected to the output end of the rectifying circuit, and the second end is connected to the first end of the resistor R6. The second end of the resistor R6 is connected to the cathode of the diode D5. The anode of the diode D5 is connected to the second end of the magnetic induction coil 271. The capacitor C3 is connected in parallel across the resistor R5.
The first end of the magnetic induction coil 271 is connected with the output end of the rectifying circuit. The magnetic induction coil 272 and the magnetic induction coil 271 are reversely coupled. The anode of diode D7 is connected to a first end of magnetic coil 272. The capacitor C5 and the resistor R8 are both connected in parallel between the cathode of the diode D7 and the second end of the magnetic induction coil 272, and the two ends of the capacitor C5 and the resistor R8 are connected in parallel with the LED lamp set 150. The capacitor C6 is connected between the second end of the magnetic coil 272 and ground.
The magnetic induction coil 273 is reversely coupled to the magnetic induction coil 271, and the second terminal of the magnetic induction coil 273 is grounded. The anode of the diode D6 is connected to the first terminal of the magnetic induction coil 273, and the cathode is connected to the first terminal of the capacitor C2. The second terminal of the capacitor C2 is grounded. The resistor R2 and the resistor R3 are connected in series between the second end of the magnetic induction coil 273 and ground. The resistor R15 has a first terminal connected between the resistor R2 and the resistor R3 and a second terminal connected to the AC/DC chip 241. The MOS transistor M1 has a gate connected to the AC/DC chip 241, a source connected to the second end of the magnetic induction coil 271, and a drain connected to ground through a resistor R7.
The second end of the resistor R15 is connected to the first interface FB of the AC/DC chip 241; the second interface VR is connected between the resistor R10 and the resistor R11; the third interface IN is connected to the wireless receiving module 100 through the digital interface 124; the eighth interface LVSS is grounded; the ninth interface VCS is connected with the drain electrode of the MOS tube M1; the twelfth interface GATE is connected with the grid electrode of the MOS tube M1; the thirteenth interface VCC is connected to the cathode of the diode D6.
Fig. 7 is a waveform diagram of the AC/DC chip 241 controlling the output current or voltage through the control reference line after receiving the digital control signal of the wireless receiving module 100. The AC/DC chip 241 generates variable reference lines 710 and 720 based on the received digital control signal. When the magnetic induction coil 271 is charged, the current gradually increases, and the voltage 730 of the ninth interface VCS of the AC/DC chip 241 also increases. When the voltage 730 of the ninth interface VCS of the AC/DC chip 241 reaches the reference line 710 or 720, the AC/DC chip 241 stops charging the magnetic induction coil 271 and switches to the output mode of the pair of LED lamp sets 150. When the reference line 710 is high, the output current of the LED lamp set 150 is large; when reference line 720 is low, the output current of LED lamp set 150 is low.
As shown in fig. 8 and 9, in the second embodiment of the present invention, the latch unit is a PWM generator 145. The LED driving module 140 further includes a switching circuit 146 and a driving circuit 141.
The PWM generator 145 receives and latches the digital control signal from the main control module 101, and generates the PWM control signal according to the latched digital control signal. The switching circuit 146 converts the current and/or voltage output from the driving circuit 141 into a driving current and/or voltage according to the PWM control signal and outputs the driving current and/or voltage to the LED lamp set 150.
It is understood that the internal circuit structure of the driving circuit 141 in this embodiment is the same as that in the first embodiment, and is not described here again.
The switching circuit 146 is respectively connected to the driving circuit 141, the LED lamp set 150 and the PWM generator 145, and the switching circuit 146 converts the current and/or voltage output from the driving circuit 141 into a driving current and/or voltage according to the PWM control signal and outputs the driving current and/or voltage to the LED lamp set 150. It can be understood that the LED lamp set 150 in this embodiment is a plurality of sets of lamp sets connected in parallel, each set of lamp sets is connected in series with a plurality of LED lamps; the switch circuit 146 is a plurality of switches respectively disposed on the plurality of groups of lamps.
It is understood that the wireless receiving module 100 and the PWM generator 145 may be on the same chip or may be separate.
The invention also provides an LED lamp, which comprises an LED driving device and an LED lamp set 150 connected with the LED driving device. It is understood that the LED driving apparatus can be the LED driving apparatus in the first embodiment or the second embodiment.
It is understood that the LED lamp set 150 is composed of LED lamps of a single color or LED lamps of at least two colors.
As shown in fig. 11, the present invention further provides an LED driving method, and in conjunction with fig. 5 or fig. 8, the wireless receiving module 100 performs the following steps:
in the wireless receiving module 100: the wake-up module 102 sends a sleep/wake-up control signal to the main control module 101, so that the main control module 101 operates in a sleep mode and a wake-up mode at predetermined time intervals. In the sleep mode, the main control module 101 does nothing. In the wake mode, the main control module 101 checks whether a control command is received:
if yes, generating a corresponding digital control signal according to the control instruction, and sending the digital control signal to the LED driving module 140, wherein in the first embodiment, the digital control signal is sent to the AC/DC chip 241 of the LED driving module 140, and in the second embodiment, the digital control signal is sent to the PWM generator 145 of the LED driving module 140;
if not, no processing is carried out, and the sleep mode is entered after a preset time interval.
In the LED driving module 140: the LED driving module 140 receives and latches the digital control signal, and generates a driving current and/or a driving voltage according to the latched digital control signal to supply to the LED lamp set 150.
In the first embodiment, the AC/DC chip 241 receives and latches the digital control signal transmitted by the wireless receiving module 100, and generates a driving current and/or voltage according to the latched digital control signal to control the current and/or voltage output by the driving circuit 141, so as to control the light emitting state of the LED lamp set 150.
In the second embodiment, the PWM generator 145 receives and latches the digital control signal sent by the wireless receiving module 100, and generates a PWM control signal according to the latched digital control signal; the switching circuit 146 converts the current and/or voltage output from the driving circuit 141 into a driving current and/or voltage according to the PWM control signal and outputs the driving current and/or voltage to the LED lamp set 150, and the driving current and/or voltage controls the light emitting state of the LED lamp set 150.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that several modifications and adaptations to those skilled in the art without departing from the principles of the present invention should also be considered within the scope of the present invention.
Claims (6)
1. An LED driving device comprises a wireless receiving module (100) and an LED driving module (140), wherein the wireless receiving module (100) and the LED driving module (140) are in communication connection through a digital interface (124); wherein,
the wireless receiving module (100) comprises a main control module (101) and a wake-up module (102);
the wake-up module (102) is connected with the main control module (101) and sends a sleep/wake-up control signal to the main control module (101), so that the main control module (101) works in a sleep mode and a wake-up mode according to a preset time interval; the main control module (101) checks whether a control instruction is received or not in the wake-up mode, and if yes, generates a corresponding digital control signal according to the control instruction and sends the digital control signal to the LED driving module (140);
the LED driving module (140) comprises a latch unit for latching the digital control signal, and the LED driving module (140) generates driving current and/or voltage according to the latched digital control signal and supplies the driving current and/or voltage to the LED lamp group (150).
2. The LED driving apparatus according to claim 1, wherein the latch unit is an AC/DC chip (241), the LED driving module (140) further comprises a driving circuit (141), and the AC/DC chip (241) receives and latches the digital control signal from the main control module (101), and controls the amplitude of the output current and/or voltage of the driving circuit (141) according to the digital control signal, so as to control the light emitting state of the LED lamp set (150).
3. The LED driving apparatus according to claim 1, wherein the latch unit is a PWM generator (145), the LED driving module (140) further comprises a switching circuit (146) and a driving circuit (141); wherein the PWM generator (145) receives and latches the digital control signal from the main control module (101), and generates a PWM control signal according to the latched digital control signal; the switch circuit (146) converts the current and/or voltage output by the driving circuit (141) into a driving current and/or voltage according to the PWM control signal and outputs the driving current and/or voltage to the LED lamp group (150).
4. An LED lamp, characterized by comprising the LED driving device according to any one of claims 1 to 3, and an LED lamp set (150) connected thereto.
5. An LED driving method, comprising:
a main control module (101) in the wireless receiving module (100) works in a sleep mode and an awakening mode according to a preset time interval; the main control module (101) does not perform any processing in the sleep mode, checks whether a control instruction is received or not in the wake-up mode, and generates a corresponding digital control signal according to the control instruction and sends the digital control signal to the LED driving module (140) if the control instruction is received;
the LED driving module (140) receives and latches the digital control signal, and generates a driving current and/or a driving voltage according to the latched digital control signal to supply to the LED lamp set (150).
6. The LED driving method according to claim 5, wherein the main control module (101) does not perform any processing if it is found that the control command is not received by checking while in the wake-up mode, and enters the sleep mode after a predetermined time interval.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2013/089676 WO2015089731A1 (en) | 2013-12-17 | 2013-12-17 | Led driving apparatus and driving method and led lamp |
Publications (1)
| Publication Number | Publication Date |
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| CN104363980A true CN104363980A (en) | 2015-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380026512.9A Pending CN104363980A (en) | 2013-12-17 | 2013-12-17 | LED driving device, driving method and LED lamp |
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| CN (1) | CN104363980A (en) |
| WO (1) | WO2015089731A1 (en) |
Cited By (1)
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| CN105392232A (en) * | 2015-12-14 | 2016-03-09 | 江苏林洋照明科技有限公司 | LED multi-channel color-mixed intelligent light bulb, intelligent illuminating system and multi-channel color-mixing method |
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| CN103023522A (en) * | 2012-12-05 | 2013-04-03 | 中国科学院上海微系统与信息技术研究所 | Ultra-low power consumption awakening receiver of wireless node of internet of things and short-distance wireless internet |
| CN103179758A (en) * | 2013-03-25 | 2013-06-26 | 惠州市经典照明电器股份有限公司 | LED (Light Emitting Diode) lamp driving system under WIFI (Wireless Fidelity) wireless control |
| CN103200741A (en) * | 2013-04-10 | 2013-07-10 | 武汉华炬光电有限公司 | Light emitting diode (LED) intelligent illuminating system based on environmental illumination self-adaption technology |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105392232A (en) * | 2015-12-14 | 2016-03-09 | 江苏林洋照明科技有限公司 | LED multi-channel color-mixed intelligent light bulb, intelligent illuminating system and multi-channel color-mixing method |
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| WO2015089731A1 (en) | 2015-06-25 |
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