WO2018120835A1 - Led灯 - Google Patents

Led灯 Download PDF

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Publication number
WO2018120835A1
WO2018120835A1 PCT/CN2017/095641 CN2017095641W WO2018120835A1 WO 2018120835 A1 WO2018120835 A1 WO 2018120835A1 CN 2017095641 W CN2017095641 W CN 2017095641W WO 2018120835 A1 WO2018120835 A1 WO 2018120835A1
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WO
WIPO (PCT)
Prior art keywords
voltage
secondary coil
wireless module
led load
led
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Application number
PCT/CN2017/095641
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English (en)
French (fr)
Inventor
楼俊山
沈锦祥
Original Assignee
生迪智慧科技有限公司
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Application filed by 生迪智慧科技有限公司 filed Critical 生迪智慧科技有限公司
Publication of WO2018120835A1 publication Critical patent/WO2018120835A1/zh
Priority to US16/444,314 priority Critical patent/US20190306944A1/en

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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]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • 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]
    • H05B45/40—Details of LED load circuits
    • 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
    • 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
    • H05B45/34—Voltage stabilisation; Maintaining constant voltage
    • 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
    • H05B45/345—Current stabilisation; Maintaining constant current
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Definitions

  • Embodiments of the present invention relate to the field of lighting technologies, and in particular, to a Light Emitting Diode (LED) lamp.
  • LED Light Emitting Diode
  • Smart home lighting is an important part of intelligent compound networking. More and more LED lights are equipped with smart home functions such as wireless connection and lighting control by adding microprocessors and wireless modules. Due to the high cost performance of the single-stage LED driving power supply scheme, most of the current LED lamps use a single-stage isolated power supply. In this single-stage isolated power supply scheme, in order to ensure the LED light is extinguished and other transient processes are performed, For power supply stability of wireless modules and microprocessors, the current preferred solution is to add an auxiliary power supply to separately power the wireless module and the microprocessor, but this solution will lead to an increase in components and an increase in cost.
  • Embodiments of the present invention provide an LED lamp to ensure power supply stability to a wireless module when the LED light is extinguished and other transient processes are controlled under the control of cost.
  • an embodiment of the present invention provides an LED lamp, the LED lamp includes a connected transformer and a wireless module, and the transformer includes a primary coil, a first secondary coil, and a second secondary coil, where The first secondary coil is used to supply power to the LED load of the LED lamp, and the second secondary coil is used to supply power to the wireless module; the LED lamp further includes: a resistor R and a control switch SW, The resistor R and the control switch SW are connected in series and are connected in parallel with at least one LED load; when the wireless module sends a light-off command, an on-signal is sent to the control switch SW, and the control switch SW is turned on.
  • the resistor R and the control switch SW are connected in series and are connected in parallel with all the LED loads;
  • the control switch SW is automatically turned off after being turned on for a preset period of time.
  • the resistor R and the control switch SW are connected in series and in parallel with a portion of the LED load; the control switch SW is automatically turned off after being turned on for a preset period of time.
  • an embodiment of the present invention provides an LED lamp, the LED lamp includes a connected transformer and a wireless module, and the transformer includes a primary coil, a first secondary coil, and a second secondary coil, where The first secondary coil is for powering an LED load of the LED lamp, and the second secondary coil is for powering the wireless module;
  • the LED lamp further includes: a resistor R connected between the high voltage side of the LED load and the wireless module, the resistor R is used for limiting a supply current, and the LED module is configured to be turned off by the LED load The voltage on the high voltage side supplies power to the wireless module.
  • the method further includes: a diode D connected in series with the resistor R; when the LED load is lit, and the voltage on the high voltage side of the LED load is less than the supply voltage of the second secondary coil, the diode D disconnected;
  • the wireless module sends a light-off command.
  • a voltage on a high voltage side of the LED load is greater than a power supply voltage of the second secondary coil, and the diode D is turned on.
  • the method further includes: a control switch SW connected in series with the resistor R; when the LED load is lit, and the voltage on the high voltage side of the LED load is greater than the power supply voltage of the second secondary coil, the control switch SW disconnected;
  • the wireless module sends a light-off command, and when the LED load is off, the wireless module sends a turn-on signal to the control switch SW, and the control switch SW is turned on.
  • the method further includes: a control switch SW connected in series with the resistor R, and a voltage detecting module for detecting a power supply voltage of the second secondary coil;
  • the switch SW is controlled to be turned on
  • the control switch SW When the voltage detection module detects that the power supply voltage of the second secondary coil is greater than a preset second voltage threshold, the control switch SW is turned off.
  • the method further includes: a Zener diode ZD connected in series with the resistor R, the breakdown voltage of the Zener diode ZD is greater than a voltage of a high voltage side of the LED load and a power supply of the second secondary coil when the LED load is extinguished Voltage difference between voltages;
  • the LED load When the LED load is lit, and the voltage of the high voltage side of the LED load is greater than the power supply voltage of the second secondary coil, when the wireless module sends a light off command, when the LED load is extinguished, the LED is The voltage on the high voltage side of the load supplies power to the wireless module.
  • An LED lamp includes a connected transformer and a wireless module, the transformer including a primary coil, a first secondary coil, and a second secondary coil, wherein the first time a level coil for powering an LED load of the LED lamp, the second secondary coil for powering the wireless module; the LED lamp further comprising: a resistor R and a control switch SW, the resistor R and the control The switch SW is connected in series and is connected in parallel with at least one LED load; when the wireless module sends a light-off command, it sends a conduction signal to the control switch SW, and the control switch SW is turned on.
  • cost control the power supply stability of the wireless module is ensured when the LED light is extinguished and other transient processes are performed.
  • FIG. 1 is a schematic diagram showing the structure of a single-stage isolated power supply of an LED lamp commonly used in the prior art
  • Embodiment 1 of an LED lamp provided by the present invention is a schematic structural view of Embodiment 1 of an LED lamp provided by the present invention
  • FIG. 3 is a schematic structural view of a second embodiment of an LED lamp provided by the present invention.
  • FIG. 4 is a schematic structural view of a third embodiment of an LED lamp provided by the present invention.
  • FIG. 5 is a schematic structural diagram of Embodiment 4 of an LED lamp provided by the present invention.
  • Embodiment 5 of an LED lamp provided by the present invention is a schematic structural view of Embodiment 5 of an LED lamp provided by the present invention.
  • FIG. 7 is a schematic structural view of Embodiment 6 of the LED lamp provided by the present invention.
  • the LED lamp includes a transformer T1, and the transformer includes a primary coil T1-A and a first secondary coil. T1-B and a second secondary winding T1-C, wherein the first secondary winding T1-B is used to power the LED load, and the second secondary winding T1-C is used as a wireless module for the LED light powered by.
  • the power supply unit shown in Figure 1 turns off the output voltage through the constant voltage control CV until the LED load fails to conduct, and the LED load is extinguished. Since the voltage loop will be saturated open during the process of lowering the output voltage, the second secondary winding T1-C cannot provide a stable voltage to the wireless module during the period in which the voltage loop is saturated.
  • an embodiment of the present invention provides an LED lamp.
  • the LED lamp provided by the present invention includes, in addition to the transformer T1 as shown in FIG. 1, a resistor R and a control switch SW.
  • the resistor R and the control switch SW are connected in series and are connected in parallel with at least one LED load.
  • the wireless module sends a light-off command, it sends a conduction signal to the control switch SW, so that the resistor R and the at least one LED load are connected in parallel.
  • the time during which the voltage loop is saturated is shortened to shorten the time during which the second secondary winding T1-C cannot supply power to the wireless module when the LED load is extinguished.
  • FIG. 2 is a schematic structural view of a first embodiment of an LED lamp provided by the present invention.
  • Figure 2 shows the case where the resistor R and all the LED loads are connected in parallel.
  • the wireless module sends a light-off command, it sends a conduction signal to the control switch SW, and the control switch SW is turned on, so that the resistor R and all The LED loads are connected in parallel to reduce the voltage loop saturation time to shorten the time that the second secondary winding T1-C cannot power the wireless module when the LED load is extinguished.
  • the time of voltage ring saturation can be changed by changing the resistance of the resistor R. Specifically, the output capacitance of the secondary circuit is large.
  • the time constant of the discharge is R*C, where C Can not be changed, the smaller R value can get a smaller time constant, you can lower the output voltage in a shorter time to shorten the voltage ring saturation time.
  • the control switch SW is in the on state, the resistor R is connected to the output terminal, which increases unnecessary power consumption, so the control switch SW is automatically turned off after being turned on for a predetermined period of time, wherein the predetermined period of time.
  • FIG. 3 is a schematic structural view of Embodiment 2 of the LED lamp provided by the present invention.
  • Figure 3 shows the case where the resistor R and part of the LED load are connected in parallel.
  • the wireless module sends a light-off command, it sends a conduction signal to the control switch SW, and the control switch SW is turned on, so that the resistor R and the part
  • the LED load is connected in parallel, and the LED load is short-circuited, so that the voltage on the high-voltage side of the LED load is rapidly lowered, and the resistor R is used to limit the discharge current, thereby shortening the saturation time of the voltage loop to shorten the second secondary coil T1-C in the LED load.
  • the time of voltage ring saturation can be changed by changing the resistance of the resistor R.
  • the output capacitance of the secondary circuit is large. Since the resistor R and the output capacitor are connected in parallel, the time constant of the discharge is R*C, where C Can not be changed, the smaller R value can get a smaller time constant, you can lower the output voltage in a shorter time to shorten the voltage ring saturation time.
  • the control switch SW is in the on state, the resistor R is connected to the output terminal, which increases unnecessary power consumption, so the control switch SW is automatically turned off after being turned on for a predetermined period of time, wherein the predetermined period of time
  • the specific settings can be determined experimentally and theoretically, based on the time required for the output voltage to drop to the target value.
  • the invention also provides an LED lamp, which comprises, in addition to the transformer T1 as shown in FIG. 1, a resistor R connected between the high voltage side of the LED load and the wireless module, the resistor R is used for limiting the power supply.
  • a resistor R connected between the high voltage side of the LED load and the wireless module, the resistor R is used for limiting the power supply.
  • Current when the wireless module sends a light-off command, the wireless module is powered by the voltage on the high-voltage side of the LED load.
  • FIG. 4 is a schematic structural view of a third embodiment of the LED lamp provided by the present invention.
  • the LED lamp provided in Embodiment 3 of the present invention further includes: a diode D connected in series with the resistor R.
  • the diode D when the LED load is lit, and the voltage on the high voltage side of the LED load is smaller than the power supply of the second secondary coil T1-C When the voltage is applied, the diode D is used to prevent backflow; when the wireless module sends a light-off command and the LED load is extinguished, the supply voltage of the second secondary winding T1-C drops rapidly, and the voltage on the high-voltage side of the LED load drops slowly.
  • the voltage on the high voltage side of the LED load is greater than the supply voltage of the second secondary winding T1-C, and the diode D is turned on, and the voltage of the high voltage side of the LED load is used to supply power to the wireless module.
  • FIG. 5 is a schematic structural view of Embodiment 4 of the LED lamp provided by the present invention. As shown in FIG. 5, the LED lamp provided in Embodiment 4 of the present invention further includes: a control switch SW connected in series with the resistor R.
  • the control switch SW is used to disconnect the high voltage side of the LED load from the wireless module. Preventing the voltage of the high voltage side of the LED load from supplying power to the wireless module; when the wireless module sends a light off command and the LED load is extinguished, the wireless module sends a conduction signal to the control switch SW, and the control switch SW is turned on, and the high voltage side of the LED load.
  • the voltage is supplied to the wireless module, and after the voltage loop exits saturation, when the supply voltage of the second secondary winding T1-C resumes power supply, the wireless module sends an off signal to the switch SW, and the switch SW is turned off.
  • FIG. 6 is a schematic structural view of Embodiment 5 of the LED lamp provided by the present invention.
  • the LED lamp provided by the embodiment of the present invention further includes: a control switch SW connected in series with the resistor R, and a voltage detecting module for detecting a power supply voltage of the second secondary coil T1-C.
  • the control switch SW when the power supply voltage of the second secondary coil T1-C detected by the voltage detecting module is less than a preset first voltage threshold, the control switch SW is turned on, and the voltage on the high voltage side of the LED load is the wireless The module supplies power, and when the voltage supply voltage of the second secondary coil T1-C detected by the voltage detecting module is greater than a preset second voltage threshold, the control switch SW is turned off.
  • the first voltage threshold is greater than a minimum value of a supply voltage of the second secondary coil, and a minimum value of a supply voltage of the second secondary coil is determined by a power supply requirement of the wireless module in different application scenarios
  • the second The voltage threshold is greater than the first voltage threshold, and the second voltage threshold is less than the voltage of the second secondary coil when the LED load is operating to ensure that the second secondary coil supplies power to the wireless module when the LED load is illuminated.
  • FIG. 7 is a schematic structural view of Embodiment 6 of the LED lamp provided by the present invention.
  • the LED lamp provided in Embodiment 6 of the present invention further includes: a Zener diode ZD connected in series with the resistor R, and the breakdown voltage of the Zener diode ZD is smaller than a voltage on the high voltage side of the LED load when the LED load is extinguished. A voltage difference between the supply voltage of the second secondary winding.
  • the breakdown voltage of the Zener diode ZD is greater than a voltage difference between the voltage of the high voltage side of the LED load and the power supply voltage of the second secondary coil.
  • the voltage on the high voltage side of the LED load does not supply power to the wireless module, but the voltage of the second secondary coil supplies power to the wireless module.
  • the wireless module sends a light-off command and the LED load is extinguished, the voltage difference between the voltage on the high-voltage side of the LED load and the power supply voltage of the second secondary coil T1-C gradually increases, and the Zener diode ZD breaks down, realizing the LED The voltage on the high voltage side of the load supplies power to the wireless module.
  • the invention increases the resistance, the control switch, the diode, the Zener diode and the like in the common single-stage isolated power supply for the LED lamp, and improves the LED light extinguishing and other transient processes by simple signal control.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Engineering & Computer Science (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

一种LED灯，包括相连接的一变压器（T1）和一无线模块，变压器（T1）包括初级线圈（T1-A）、第一次级线圈（T1-B）和第二次级线圈（T1-C），其中，第一次级线圈（T1-B）用于为LED灯的LED负载供电，第二次级线圈（T1-C）用于为无线模块供电；该LED灯还包括：电阻（R）和控制开关（SW），电阻（R）和控制开关（SW）串联，且与至少一个LED负载并联；无线模块发送关灯指令时，发送导通信号给控制开关（SW），控制开关（SW）导通。在控制成本的情况下能保证LED灯熄灭和其他一些瞬态过程时对无线模块的供电稳定性。

Description

LED灯 技术领域
本发明实施例涉及照明技术领域，尤其涉及一种发光二极管(Light Emitting Diode，简称LED)灯。
背景技术
智能家居照明是智能化物联网重要的组成部分，越来越多的LED灯中通过加入微处理器、无线模块等来实现诸如无线连接和灯光控制等智能家居功能。由于单级结构的LED驱动电源方案具有较高的性价比，所以目前的LED灯大多采用单级隔离电源，在这种单级隔离电源方案中，为保证LED灯熄灭和其他一些瞬态过程时，对无线模块和微处理器的供电稳定性，现有的优选方案是增加一路辅助电源为无线模块和微处理器单独供电，但是这种方案会导致元器件增加，以及成本的上升。
发明内容
本发明实施例提供一种LED灯，以在控制成本的情况下保证LED灯熄灭和其他一些瞬态过程时对无线模块的供电稳定性。
第一方面，本发明实施例提供一种LED灯，所述LED灯包括相连接的一变压器和一无线模块，所述变压器包括初级线圈、第一次级线圈和第二次级线圈，其中，所述第一次级线圈用于为所述LED灯的LED负载供电，所述第二次级线圈用于为所述无线模块供电；所述LED灯还包括：电阻R和控制开关SW，所述电阻R和控制开关SW串联，且与至少一个LED负载并联；所述无线模块发送关灯指令时，发送导通信号给所述控制开关SW，所述控制开关SW导通。
可选地，所述电阻R和控制开关SW串联，且与所有的LED负载并联；
所述控制开关SW在导通预设时间段之后自动断开。
可选地，所述电阻R和控制开关SW串联，且与部分LED负载并联；所述控制开关SW在导通预设时间段之后自动断开。
第二方面，本发明实施例提供一种LED灯，所述LED灯包括相连接的一变压器和一无线模块，所述变压器包括初级线圈、第一次级线圈和第二次级线圈，其中，所述第一次级线圈用于为所述LED灯的LED负载供电，所述第二次级线圈用于为所述无线模块供电；所 述LED灯还包括：连接于所述LED负载高压侧和所述无线模块之间的电阻R，所述电阻R用于限制供电电流，所述无线模块发送关灯指令时，由所述LED负载高压侧的电压为所述无线模块供电。
可选地，还包括：与所述电阻R串联的二极管D；所述LED负载点亮时，且所述LED负载高压侧的电压小于所述第二次级线圈的供电电压时，所述二极管D断开；
所述无线模块发送关灯指令，所述LED负载熄灭时，所述LED负载高压侧的电压大于所述第二次级线圈的供电电压，所述二极管D导通。
可选地，还包括：与所述电阻R串联的控制开关SW；所述LED负载点亮时，且所述LED负载高压侧的电压大于第二次级线圈的供电电压时，所述控制开关SW断开；
所述无线模块发送关灯指令，所述LED负载熄灭时，所述无线模块发送导通信号给所述控制开关SW，所述控制开关SW导通。
可选地，还包括：与所述电阻R串联的控制开关SW，以及用于检测所述第二次级线圈的供电电压的电压检测模块；
所述电压检测模块检测到的所述第二次级线圈的供电电压小于预设的第一电压阈值时，控制所述开关SW导通；
所述电压检测模块检测到的所述第二次级线圈的供电电压大于预设的第二电压阈值时，控制开关SW断开。
可选地，还包括：与所述电阻R串联的稳压二极管ZD，所述稳压二极管ZD的击穿电压大于所述LED负载熄灭时LED负载高压侧的电压与第二次级线圈的供电电压之间电压差；
当所述LED负载点亮，且所述LED负载高压侧的电压大于第二次级线圈的供电电压时，则当所述无线模块发送关灯指令，所述LED负载熄灭时，由所述LED负载高压侧的电压为所述无线模块供电。
本发明实施例一种LED灯，所述LED灯包括相连接的一变压器和一无线模块，所述变压器包括初级线圈、第一次级线圈和第二次级线圈，其中，所述第一次级线圈用于为所述LED灯的LED负载供电，所述第二次级线圈用于为所述无线模块供电；所述LED灯还包括：电阻R和控制开关SW，所述电阻R和控制开关SW串联，且与至少一个LED负载并联；所述无线模块发送关灯指令时，发送导通信号给所述控制开关SW，所述控制开关SW导通。在控制成本的情况下保证LED灯熄灭和其他一些瞬态过程时对无线模块的供电稳定性。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1示出了现有技术中常用的LED灯的单级隔离电源结构示意图；
图2示出了本发明提供的LED灯实施例一的结构示意图；
图3示出了本发明提供的LED灯实施例二的结构示意图；
图4示出了本发明提供的LED灯实施例三的结构示意图；
图5示出了本发明提供的LED灯实施例四的结构示意图；
图6示出了本发明提供的LED灯实施例五的结构示意图；
图7示出了本发明提供的LED灯实施例六的结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
图1示出了现有技术中常用的LED灯的单级隔离电源结构示意图，如图1所示，所述LED灯包括一变压器T1，该变压器包括初级线圈T1-A、第一次级线圈T1-B和第二次级线圈T1-C，其中，所述第一次级线圈T1-B用于为LED负载供电，第二次级线圈T1-C用于为所述LED灯的无线模块供电。
图1所示电源装置通过恒压控制CV将输出电压调低到LED负载无法导通时，LED负载熄灭。由于在调低输出电压过程中，电压环将会饱和开路，所以第二次级线圈T1-C在电压环饱和的这段时间内无法为无线模块提供稳定的电压。
现有技术中通过增加一路辅助电源为无线模块和微处理器单独供电，导致元器件增加，以及成本的上升。为了解决这一问题，本发明实施例提供一种LED灯。
其中本发明所提供的LED灯除了包括如图1所示的变压器T1外，还包括：电阻R和控制开关SW，所述电阻R和控制开关SW串联，且与至少一个LED负载并联。当无线模块发送关灯指令时，发送导通信号给控制开关SW，使电阻R和至少一个LED负载并联，来 缩短电压环饱和的时间，以缩短第二次级线圈T1-C在LED负载熄灭时无法为无线模块供电的时间。
下面结合附图对本发明作进一步详细描述。
图2示出了本发明提供的LED灯实施例一的结构示意图。图2所示为电阻R和所有LED负载并联的情况，在这种情况下，当无线模块发送关灯指令时，发送导通信号给控制开关SW，控制开关SW导通，使电阻R和所有LED负载并联，来缩短电压环饱和的时间，以缩短第二次级线圈T1-C在LED负载熄灭时无法为无线模块供电的时间。其中，可以通过改变电阻R的阻值来改变电压环饱和的时间，具体地，次级电路的输出电容很大，由于电阻R和该输出电容并联，放电的时间常数是R*C，其中C无法改变，则较小的R值可以得到较小的时间常数，则可以在较短的时间内把输出电压降下来，以缩短电压环饱和的时间。进一步地，因为控制开关SW导通状态下，电阻R连接在输出端，增加了不必要的功耗，所以控制开关SW在导通预定时间段之后自动断开，其中，所述预定时间段的具体设定可以经过实验及理论分析，根据输出电压下降到目标值所需的时间来确定。
图3示出了本发明提供的LED灯实施例二的结构示意图。图3所示为电阻R和部分LED负载并联的情况，在这种情况下，当无线模块发送关灯指令时，发送导通信号给控制开关SW，控制开关SW导通，使电阻R和部分LED负载并联，短路部分LED负载，使LED负载高压侧的电压迅速降低，电阻R用于限制放电电流，借此来缩短电压环饱和的时间，以缩短第二次级线圈T1-C在LED负载熄灭时无法为无线模块供电的时间。其中，可以通过改变电阻R的阻值来改变电压环饱和的时间，具体地，次级电路的输出电容很大，由于电阻R和该输出电容并联，放电的时间常数是R*C，其中C无法改变，则较小的R值可以得到较小的时间常数，则可以在较短的时间内把输出电压降下来，以缩短电压环饱和的时间。进一步地，因为控制开关SW导通状态下，电阻R连接在输出端，增加了不必要的功耗，所以控制开关SW在导通预定时间段之后自动断开，其中，所述预定时间段的具体设定可以经过实验及理论分析，根据输出电压下降到目标值所需的时间来确定。
本发明还提出了一种LED灯，该LED灯除包括如图1所示的变压器T1外，还包括：连接于LED负载高压侧和无线模块之间的电阻R，该电阻R用于限制供电电流，当无线模块发送关灯指令时，由LED负载高压侧的电压为所述无线模块供电。
图4示出了本发明提供的LED灯实施例三的结构示意图。如图4所示，本发明实施例三提供的LED灯还包括：与所述电阻R串联的二极管D。
具体地，当LED负载点亮，且LED负载高压侧的电压小于第二次级线圈T1-C的供电 电压时，所述二极管D用于防止反流；当无线模块发送关灯指令，LED负载熄灭时，第二次级线圈T1-C的供电电压迅速下降，LED负载高压侧的电压下降较慢，LED负载高压侧的电压大于第二次级线圈T1-C的供电电压，所述二极管D导通，由LED负载高压侧的电压为所述无线模块供电。
图5示出了本发明提供的LED灯实施例四的结构示意图。如图5所示，本发明实施例四提供的LED灯还包括：与所述电阻R串联的控制开关SW。
具体地，当LED负载点亮，且LED负载高压侧的电压大于第二次级线圈T1-C的供电电压时，所述控制开关SW用于断开所述LED负载高压侧与无线模块的连接，防止LED负载高压侧的电压为所述无线模块供电；当无线模块发送关灯指令，LED负载熄灭时，无线模块发送导通信号给控制开关SW，控制开关SW导通，由LED负载高压侧的电压为所述无线模块供电，并且在电压环退出饱和后，第二次级线圈T1-C的供电电压恢复供电时，无线模块发送断开信号给开关SW，开关SW断开。
图6示出了本发明提供的LED灯实施例五的结构示意图。如图6所示，本发明实施例提供的LED灯还包括：与所述电阻R串联的控制开关SW，以及用于检测第二次级线圈T1-C的供电电压的电压检测模块。
具体地，当所述电压检测模块检测到的第二次级线圈T1-C的供电电压小于预设的第一电压阈值时，控制开关SW导通，由LED负载高压侧的电压为所述无线模块供电，当所述电压检测模块检测到的第二次级线圈T1-C的供电电压大于预设的第二电压阈值时，控制开关SW断开。其中，所述第一电压阈值大于第二次级线圈的供电电压的最小值，第二次级线圈的供电电压的最小值在不同的应用场景下由无线模块的供电要求决定，所述第二电压阈值大于第一电压阈值，且该第二电压阈值小于LED负载工作时的第二次级线圈的电压，以保证LED负载点亮时，由第二次级线圈为无线模块进行供电。
图7示出了本发明提供的LED灯实施例六的结构示意图。如图7所示，本发明实施例六提供的LED灯还包括：与所述电阻R串联的稳压二极管ZD，该稳压二极管ZD的击穿电压小于LED负载熄灭时LED负载高压侧的电压与第二次级线圈的供电电压之间电压差。
具体地，当所述LED负载点亮，所述稳压二极管ZD的击穿电压大于所述LED负载高压侧的电压与第二次级线圈的供电电压之间电压差。所述LED负载高压侧的电压不为所述无线模块供电，而是由第二次级线圈的电压为所述无线模块供电。当无线模块发送关灯指令，LED负载熄灭时，LED负载高压侧的电压和第二次级线圈T1-C的供电电压之间的电压差逐渐增大，稳压二极管ZD击穿，实现了LED负载高压侧的电压为所述无线模块供电。
本发明通过在常见的用于LED灯的单级隔离电源中，增加电阻、控制开关、二极管、稳压二极管等器件，通过简单的信号控制，提高了在LED灯熄灭和其他一些瞬态过程时，对无线模块供电的稳定性，并且由于所增加的器件数量少，并且是常见的器件，该实现方案成本低。
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims (8)

  1. 一种LED灯，所述LED灯包括相连接的一变压器和一无线模块，所述变压器包括初级线圈、第一次级线圈和第二次级线圈，其中，所述第一次级线圈用于为所述LED灯的LED负载供电，所述第二次级线圈用于为所述无线模块供电；其特征在于，所述LED灯还包括：电阻R和控制开关SW，所述电阻R和控制开关SW串联，且与至少一个LED负载并联；
    所述无线模块发送关灯指令时，发送导通信号给所述控制开关SW，所述控制开关SW导通。
  2. 根据权利要求1所述的LED灯，其特征在于，所述电阻R和控制开关SW串联，且与所有的LED负载并联；
    所述控制开关SW在导通预设时间段之后自动断开。
  3. 根据权利要求1所述的LED灯，其特征在于，所述电阻R和控制开关SW串联，且与部分LED负载并联；
    所述控制开关SW在导通预设时间段之后自动断开。
  4. 一种LED灯，所述LED灯包括相连接的一变压器和一无线模块，所述变压器包括初级线圈、第一次级线圈和第二次级线圈，其中，所述第一次级线圈用于为所述LED灯的LED负载供电，所述第二次级线圈用于为所述无线模块供电；其特征在于，所述LED灯还包括：连接于所述LED负载高压侧和所述无线模块之间的电阻R，所述电阻R用于限制供电电流，所述无线模块发送关灯指令时，由所述LED负载高压侧的电压为所述无线模块供电。
  5. 根据权利要求4所述的LED灯，其特征在于，还包括：与所述电阻R串联的二极管D；
    所述LED负载点亮时，且所述LED负载高压侧的电压小于所述第二次级线圈的供电电压时，所述二极管D断开；
    所述无线模块发送关灯指令，所述LED负载熄灭时，所述LED负载高压侧的电压大于所述第二次级线圈的供电电压，所述二极管D导通。
  6. 根据权利要求4所述的LED灯，其特征在于，还包括：与所述电阻R串联的控制开关SW；
    所述LED负载点亮时，且所述LED负载高压侧的电压大于第二次级线圈的供电电压时，所述控制开关SW断开；
    所述无线模块发送关灯指令，所述LED负载熄灭时，所述无线模块发送导通信号给所述控制开关SW，所述控制开关SW导通。
  7. 根据权利要求4所述的LED灯，其特征在于，还包括：与所述电阻R串联的控制开关SW，以及用于检测所述第二次级线圈的供电电压的电压检测模块；
    所述电压检测模块检测到的所述第二次级线圈的供电电压小于预设的第一电压阈值时，控制所述开关SW导通；
    所述电压检测模块检测到的所述第二次级线圈的供电电压大于预设的第二电压阈值时，控制开关SW断开。
  8. 根据权利要求4所述的LED灯，其特征在于，还包括：与所述电阻R串联的稳压二极管ZD；
    所述稳压二极管ZD的击穿电压小于所述LED负载熄灭时LED负载高压侧的电压与第二次级线圈的供电电压之间电压差，则当所述无线模块发送关灯指令，所述LED负载熄灭时，由所述LED负载高压侧的电压为所述无线模块供电；
    当所述LED负载点亮，所述稳压二极管ZD的击穿电压大于所述LED负载高压侧的电压与第二次级线圈的供电电压之间电压差，则由第二次级线圈的电压为所述无线模块供电。
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