WO2017000381A1 - 一种led灯的驱动电路及照明设备 - Google Patents

一种led灯的驱动电路及照明设备 Download PDF

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Publication number
WO2017000381A1
WO2017000381A1 PCT/CN2015/088982 CN2015088982W WO2017000381A1 WO 2017000381 A1 WO2017000381 A1 WO 2017000381A1 CN 2015088982 W CN2015088982 W CN 2015088982W WO 2017000381 A1 WO2017000381 A1 WO 2017000381A1
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led lamp
driving circuit
thermistor
led
lamp
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PCT/CN2015/088982
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English (en)
French (fr)
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朱明星
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上海顿格电子贸易有限公司
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Publication of WO2017000381A1 publication Critical patent/WO2017000381A1/zh

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    • 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
    • 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
    • F21V23/02—Arrangement of electric circuit elements in or on lighting devices the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier

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  • the present invention relates to the field of lighting technologies, and in particular, to a driving circuit and a lighting device for an LED lamp.
  • the LED filament lamp has a relatively close appearance to an ordinary incandescent lamp, so that the user's receiving degree is relatively high, but since the related art of the driving circuit of the LED filament lamp is relatively lagging, the volume of the driving circuit module is large, so the conventional LED In the filament lamp, a plastic housing dedicated to the driving circuit module is required at the junction between the lamp cap and the bulb, so that the appearance of the entire LED filament is different, and the user's receiving degree is greatly reduced. It is also not convenient for everyday use.
  • the LED filament lamp realize the thyristor dimming like the incandescent lamp
  • it is generally required to set the dimmable switching power supply circuit module, but since the power circuit module is large in size, it cannot be directly placed into the LED filament lamp.
  • the overall volume of the LED filament lamp is further increased.
  • the present application describes an LED lamp driving circuit that can supply electric energy to an LED lamp based on an AC power source, and the driving circuit includes:
  • rectifier module having an AC input terminal and a DC output terminal, wherein the rectifier module is connected to the AC power source through the AC input terminal to rectify the AC power provided by the AC power source into DC power output through the DC output terminal;
  • a thermistor connected to the DC output terminal and the LED lamp to drive the LED lamp to emit light by using the DC power
  • the thermistor is a positive temperature coefficient thermistor such that current flowing through the LED lamp is within a nominal range of the LED lamp.
  • the LED lamp driving circuit further includes:
  • a thyristor dimmer is coupled in series with the LED lamp to adjust the brightness of the LED lamp by adjusting the current flowing through the LED lamp.
  • the LED lamp driving circuit further includes:
  • a fuse is connected in series between the alternating current power source and the rectifier module.
  • the rectifier module is a bridge rectifier.
  • the LED lamp is an LED filament lamp.
  • the thermistor is an LPTC linear thermistor.
  • LED lamp driving circuit As a preferred embodiment, based on any of the above LED lamp driving circuits, In the LED lamp driving circuit:
  • the LED lamp includes a bulb and a lamp cap, and the LED lamp driving circuit is submerged in the lamp cap.
  • the LED lamp driving circuit is:
  • the material of the bulb is a light transmissive material.
  • the LED lamp driving circuit is:
  • the material of the bulb is glass.
  • the application also provides a lighting device comprising the LED lamp driving circuit of any of the above.
  • the driving circuit and the lighting device of the LED lamp described in the present application by connecting a thermistor between the LED lamp and the power source, so that the current flowing through the LED lamp is within the rated power range, thereby realizing the constant current of the LED lamp.
  • the effect is also that the thyristor dimmer can be connected in series to adjust the brightness of the LED lamp; in addition, the overall circuit is simple, easy to implement and small in size, and can be integrally embedded in the lamp cap of the LED lamp, so that the overall appearance of the LED lamp It is similar to the appearance of incandescent lamps, so as to effectively improve user acceptance and facilitate popularization and application.
  • FIG. 1 is a schematic structural diagram of a module of a driving circuit of an LED lamp according to an embodiment of the present application
  • FIG. 2 is a circuit diagram of a driving circuit of an LED lamp in the embodiment of the present application.
  • the driving circuit and the lighting device of the LED lamp provided in the embodiments of the present invention can be applied to a filament lamp product, mainly by limiting the current by using a resistor in series with the LED lamp, and further implementing the LED through the series thyristor dimmer.
  • the function of dimming the lamp since the above-mentioned resistance in series with the LED lamp is a miniaturized positive temperature coefficient resistor, the resistance value is increased when the temperature is raised to reduce the current in the circuit, thereby reducing the power to maintain the LED
  • the power of the lamp is within the rated range, that is, the positive temperature coefficient thermistor is used to limit the current flowing through the LED within the rated current range (ie, to achieve a constant current effect), and the thyristor dimmer is used to realize the LED lamp.
  • the dimming function takes into account the temperature protection function of the circuit, and has the advantages of simple wiring, small size, low cost, and simple manufacturing and processing.
  • an LED lamp driving circuit in the present application can be based on a system for supplying power to an LED lamp by using an alternating current power source, including:
  • AC power supply which can be used for daily civil alternating current (such as domestic civil 220V/50Hz AC power, of course, other specifications of AC power can be used as long as it is in the subsequent rectifier module.
  • daily civil alternating current such as domestic civil 220V/50Hz AC power, of course, other specifications of AC power can be used as long as it is in the subsequent rectifier module.
  • rectification for supplying electrical energy to the LED lamp;
  • the rectifier module has an AC input end and a DC output end, wherein the AC power source and the AC input end are connected to use the rectifier module to rectify the AC power provided by the AC power source into DC power, and output through the DC output end;
  • the thermistor and the LED lamp are connected in series at the DC output end of the rectifier module to drive the LED lamp to emit light by using DC power; meanwhile, the thermistor is a positive temperature-washing thermistor, and the resistance value thereof increases with temperature.
  • the increase can further effectively limit the current value in the DC circuit, so that the DC current flowing through the LED lamp is within the rated range of the LED lamp, that is, the LED lamp operates in a constant current environment.
  • the LED lamp driving circuit may further include a thyristor dimmer, which is connected in series with the thermistor and the LED lamp for adjusting flow through The current value of the LED lamp, in turn, achieves the purpose of adjusting the brightness of the LED lamp.
  • a thyristor dimmer which is connected in series with the thermistor and the LED lamp for adjusting flow through The current value of the LED lamp, in turn, achieves the purpose of adjusting the brightness of the LED lamp.
  • the LED lamp driving circuit may further include a fuse (not shown), and the AC power source is connected to the rectifier module through a fuse for protecting the AC circuit.
  • the LED lamp can be an LED filament lamp
  • the rectifier module can be a bridge rectifier
  • the thermistor can be an LPTC linear thermistor.
  • the LED lamp comprises a bulb and a lamp cap that are connected to each other, and the LED lamp driving circuit in the embodiment is embedded in the lamp cap, so that the LED lamp is similar to the current incandescent lamp, thereby improving user acceptance. Degree, easy to promote the application.
  • the material of the blister described above may be a light transmissive material such as glass.
  • the driving circuit of the LED lamp in the embodiment of the present application includes:
  • An AC power source (not shown) having a connection terminal L and a connection terminal N, and the connection terminal L is connected to the AC input terminal 1 of the bridge rectifier BD via a fuse F, and the connection terminal N is connected to the bridge rectifier BD.
  • the AC input terminal 3 is configured such that the bridge rectifier BD rectifies the AC power supplied by the AC power source and outputs DC power through the DC output terminal 2 and the DC output terminal 4.
  • the above driving circuit further comprises an LED filament lamp and a thermistor RT connected in series between the DC output terminal 2 and the DC output terminal 4, that is, the sinusoidal alternating current passes through the fuse (ie, the fuse) F and the bridge rectifier ( That is, the bridge stack) is BD rectified, and outputs a semi-positive Xuan wave voltage; when the semi-positive Xuan wave voltage flows through a load circuit including an LED filament lamp and a thermistor RT, since the LED filament lamp is a constant voltage voltage dividing device, In turn, the residual voltage is applied to the thermistor RT, that is, the thermistor RT is mainly used for voltage limiting current limiting.
  • the voltage shared by the thermistor RT increases, and the current flowing through the LED filament lamp and the thermistor RT increases, that is, the power consumed by the thermistor RT. It will increase, the temperature on the thermistor RT will rise, and the thermistor RT is a positive temperature coefficient thermistor, so that the resistance increases after the temperature rises, and the current flowing through the RT1 decreases. Compensating for the part of the current that rises due to the increase of the input voltage, so that the current flowing through the LED does not change, and the constant current effect is achieved.
  • the above driving circuit may further include a thyristor dimmer to make an alternating current waveform
  • the phase angle is cut off a part (within a preset range), so that the voltage applied to the LED filament lamp and the thermistor RT changes accordingly, and the partial pressure of the LED filament lamp is fixed due to heat.
  • the voltage on the sensitive RT will change accordingly, and the corresponding current will also change accordingly, that is, the current flowing through the LED filament lamp also changes, and the light emitted by the LED filament lamp changes with the current, thus achieving the LED Dimming of the filament lamp.
  • the thermistor RT can be an LPTC linear thermistor (such as a WMZ58B series thermistor), and the resistance of the LPTC linear thermistor increases with temperature, and changes linearly, that is, Linearity is good.
  • LPTC linear thermistor such as a WMZ58B series thermistor
  • the present application also provides a lighting device, which may include the driving circuit described in the first embodiment and/or the second embodiment.
  • the thermistor is connected in series between the LED lamp and the power source, so that the current flowing through the LED lamp is within the rated power range, thereby achieving the effect of constant current of the LED lamp, and
  • the thyristor dimmer can also be connected in series to adjust the brightness of the LED lamp;
  • the overall circuit is simple, easy to implement and small in size, and can be integrally embedded in the lamp cap of the LED lamp, so that the overall appearance of the LED lamp and the incandescent lamp The appearance is relatively similar, in order to effectively improve user acceptance and facilitate the promotion and application.

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

Abstract

一种LED灯的驱动电路及照明设备，涉及照明技术领域，通过将LED灯与电源之间串联热敏电阻（RT），以使得流经LED灯的电流在额定功率范围内，进而实现LED灯恒流的效果，且还可串联可控硅调光器，以调整LED灯的亮度；另外，整体电路简单，实现容易且体积较小，能够整体嵌入设置于LED灯的灯头内，使得LED灯的整体外观与白炽灯的外观较为近似，以有效的提高用户接受度，便于推广应用。

Description

一种LED灯的驱动电路及照明设备 技术领域
本发明涉及照明技术领域，尤其涉及一种LED灯的驱动电路及照明设备。
背景技术
目前，作为新一代的点光源的LED，由于具有电光转换率高、寿命长、成本低廉及环保等优点，被广泛的应用于人们的日常生活中进而使得LED技术得到快速的发展，并衍生出众多种类的照明设备。
例如，LED灯丝灯，其外观上比较接近普通的白炽灯，使得用户的接收程度较高，但由于LED灯丝灯的驱动电路相关技术相对滞后，致使驱动电路模块的体积较大，故传统的LED灯丝灯中均需要在灯头与泡壳之间的衔接处设置专门用于放置驱动电路模块的塑料壳体，进而使得整个LED灯丝的外观就有一定的区别，进而使得用户的接收程度大大降低，且也不便于用于的日常使用。
另外，当前为了使得LED灯丝灯像白炽灯一样实现可控硅调光，一般是需要设置可调光开关电源电路模块，但由于该电源电路模块的体积较大，其无法直接放入LED灯丝灯的灯头中，进而进一步的增大了LED灯丝灯的整体体积。
发明内容
鉴于上述问题，本申请记载了一种LED灯驱动电路，可基于交流电源向LED灯提供电能，所述驱动电路包括：
整流模块，具有交流输入端和直流输出端，所述整流模块通过所述交流输入端与所述交流电源连接，以将所述交流电源提供的交流电整流为直流电经所述直流输出端输出；
串联于所述直流输出端的热敏电阻和所述LED灯，以利用所述直流电驱动所述LED灯发光；以及
所述热敏电阻为正温度系数热敏电阻，以使流经所述LED灯的电流在所述LED灯的额定范围内。
作为一个优选的实施例，上述的LED灯驱动电路还包括：
可控硅调光器，与所述LED灯串联，以通过调整流经所述LED灯的电流来调整所述LED灯的亮度。
作为一个优选的实施例，上述的LED灯驱动电路还包括：
熔丝，串联在所述交流电源与所述整流模块之间。
作为一个优选的实施例，上述的LED灯驱动电路中：
所述整流模块为桥式整流器。
作为一个优选的实施例，上述的LED灯驱动电路中：
所述LED灯为LED灯丝灯。
作为一个优选的实施例，上述的LED灯驱动电路中：
所述热敏电阻为LPTC线性热敏电阻。
作为一个优选的实施例，基于上述任意一项LED灯驱动电路， 该LED灯驱动电路中：
所述LED灯包括泡壳和灯头，所述LED灯驱动电路潜入设置于所述灯头中。
作为一个优选的实施例，基于上述任意一项LED灯驱动电路，该LED灯驱动电路中：
所述泡壳的材质为透光材质。
作为一个优选的实施例，基于上述任意一项LED灯驱动电路，该LED灯驱动电路中：
所述泡壳的材质为玻璃。
本申请还提供了一种照明设备，包括上述任意一项所述的LED灯驱动电路。
上述技术方案具有如下优点或有益效果：
本申请中记载的一种LED灯的驱动电路及照明设备，通过将LED灯与电源之间串联热敏电阻，以使得流经LED灯的电流在额定功率范围内，进而实现LED灯恒流的效果，且还可串联可控硅调光器，以调整LED灯的亮度；另外，整体电路简单，实现容易且体积较小，能够整体嵌入设置于LED灯的灯头内，使得LED灯的整体外观与白炽灯的外观较为近似，以有效的提高用户接受度，便于推广应用。
附图说明
参考所附附图，以更加充分的描述本发明的实施例。然而，所附附图仅用于说明和阐述，并不构成对本发明范围的限制。
图1为本申请实施例中LED灯的驱动电路的模块结构示意图；
图2为本申请实施例中LED灯的驱动电路的电路图。
具体实施方式
本发明实施例中提供的LED灯的驱动电路及照明设备，可应用于灯丝灯产品中，主要是通过利用电阻与LED灯串联来限制电流，还可通过串联可控硅调光器进而实现LED灯调光的功能；由于上述与LED灯串联的电阻是采用小型化的正温度系数电阻，其在实现温度升高时阻值增大以减小电路中的电流，从而降低功率，以保持LED灯的功率在额定的范围内，即采用正温度系数热敏电阻来限制流经LED的电流在额定电流的范围内(即实现恒流效果)，并利用可控硅调光器来实现LED灯的调光功能，同时兼顾了电路的温度保护功能，且具有诸如线路简单、体积小、成本低、制造加工简单等优点。
下面结合附图和具体实施例对本发明的像素阵列及包括该像素阵列的显示器件的制备方法进行详细说明。
实施例一
图1为本申请实施例中LED灯的驱动电路的模块结构示意图；如图1所示，本申请中的一种LED灯驱动电路，可基于利用交流电源向LED灯供电的系统中，包括：
交流电源，可为日常民用交流电(如国内的民用的220V/50Hz的交流电，当然也可使用其他规格的交流电，只要其在后续整流模块 整流的范围内即可)，以用于向LED灯提供电能；
整流模块，具有交流输入端和直流输出端，上述的交流电源与交流输入端连接，以利用该整流模块将交流电源提供的交流电整流为直流电，并经直流输出端输出；
热敏电阻和LED灯，串联在上述整流模块的直流输出端，以利用直流电驱动LED灯发光；同时，该热敏电阻为正温度洗漱热敏电阻，其阻值会随着温度的升高而增大，进而能够有效的限制上述直流电路中的电流值，使得流经LED灯的直流电电流值在该LED灯的额定范围内，即使得LED灯工作在恒流的环境中。
优选的，如图1所示，上述的LED灯驱动电路还可包括可控硅调光器，该可控硅调光器与上述的热敏电阻、LED灯串联，以用于通过调整流经LED灯的电流值，进而实现对LED灯亮度进行调整的目的。
优选的，上述的LED灯驱动电路还可包括熔丝(图中未标示)，交流电源通过熔丝与整流模块连接，以用于对交流电路进行保护。
优选的，上述的LED灯可为LED灯丝灯，而整流模块可为桥式整流器，热敏电阻可为LPTC线性热敏电阻。
优选的，上述的LED灯包括相互衔接的泡壳和灯头，且本实施例中的LED灯驱动电路嵌入设置于灯头中，以使得LED灯与当前的白炽灯外观较为近似，进而提高用户的接受度，便于推广应用。
优选的，上述的泡壳的材质可为诸如玻璃等透光材质。
实施例二
图2为本申请实施例中LED灯的驱动电路的电路图，如图2所示，基于上述实施例一的基础上，本申请实施例中的LED灯的驱动电路包括：
具有连接端L和连接端N的交流电源(图中未标示)，且连接端L通过熔丝F连接至桥式整流器BD的交流输入端1，而连接端N则连接至桥式整流器BD的交流输入端3，以使得桥式整流器BD对上述交流电源提供的交流电进行整流并经直流输出端2和直流输出端4输出直流电。
进一步的，上述的驱动电路还包括串联在上述直流输出端2和直流输出端4之间的LED灯丝灯及热敏电阻RT，即正玄交流电经过熔丝(即保险丝)F和桥式整流器(即桥堆)BD整流后，输出半正玄波电压；当该半正玄波电压流过包括LED灯丝灯和热敏电阻RT组成的负载电路时，由于LED灯丝灯为恒压分压器件，进而使得剩余电压均施加在热敏电阻RT上，即该热敏电阻RT主要用于分压限流。
例如，当输入交流电压升高的时候，热敏电阻RT上分担电压就会升高，进而流过LED灯丝灯及热敏电阻RT的电流就会升高，即热敏电阻RT上消耗的功率就会增加，热敏电阻RT上的温度就会升高，而因热敏电阻RT为正温度系数热敏电阻，从而温度升高后阻值增大，则流过RT1上的电流降低，来补偿因输入电压升高而造成电流升高的部分，从而达到流过LED的电流不变，起到恒流效果。
另外，上述的驱动电路还可包括可控硅调光器，以使得交流波形 相位角被切掉一部分(在预设的范围内)，即使得施加在负责LED灯丝灯和热敏电阻RT上的电压随之进行变化，而LED灯丝灯的分压则固定不变，由于热敏RT上的电压会随之变化，相应的电流也会随之变化，即流过LED灯丝灯的电流也变化，而LED灯丝灯发出的光是随电流变化而变化，这样就实现了对LED灯丝灯的调光。
优选的，上述的热敏电阻RT可为LPTC线性热敏电阻(如WMZ58B系列热敏电阻)，而由于LPTC线性热敏电阻的阻值会随温度升高而增大，且呈直线变化，即线性好。
本申请还提供了一种照明设备，可包括上述实施例一和/或实施例二中所记载的驱动电路。
综上所述，本发明的上述实施例中，通过将LED灯与电源之间串联热敏电阻，以使得流经LED灯的电流在额定功率范围内，进而实现LED灯恒流的效果，且还可串联可控硅调光器，以调整LED灯的亮度；另外，整体电路简单，实现容易且体积较小，能够整体嵌入设置于LED灯的灯头内，使得LED灯的整体外观与白炽灯的外观较为近似，以有效的提高用户接受度，便于推广应用。
对于本领域的技术人员而言，阅读上述说明后，各种变化和修正无疑将显而易见。因此，所附的权利要求书应看作是涵盖本发明的真实意图和范围的全部变化和修正。在权利要求书范围内任何和所有等价的范围与内容，都应认为仍属本发明的意图和范围内。

Claims (10)

  1. 一种LED灯驱动电路，其特征在于，基于交流电源向LED灯提供电能，所述驱动电路包括：
    整流模块，具有交流输入端和直流输出端，所述整流模块通过所述交流输入端与所述交流电源连接，以将所述交流电源提供的交流电整流为直流电经所述直流输出端输出；
    串联于所述直流输出端的热敏电阻和所述LED灯，以利用所述直流电驱动所述LED灯发光；以及
    所述热敏电阻为正温度系数热敏电阻，以使流经所述LED灯的电流在所述LED灯的额定范围内。
  2. 如权利要求1所述的LED灯驱动电路，其特征在于，所述驱动电路还包括：
    可控硅调光器，与所述LED灯串联，以通过调整流经所述LED灯的电流来调整所述LED灯的亮度。
  3. 如权利要求1所述的LED灯驱动电路，其特征在于，所述驱动电路还包括：
    熔丝，串联在所述交流电源与所述整流模块之间。
  4. 如权利要求1所述的LED灯驱动电路，其特征在于，所述整流模块为桥式整流器。
  5. 如权利要求1所述的LED灯驱动电路，其特征在于，所述LED灯为LED灯丝灯。
  6. 如权利要求1所述的LED灯驱动电路，其特征在于，所述热敏电阻为LPTC线性热敏电阻。
  7. 如权利要求1～6中任意一项所述的LED灯驱动电路，其特征在于，所述LED灯包括泡壳和灯头，所述LED灯驱动电路嵌入设置于所述灯头中。
  8. 如权利要求7所述的LED灯驱动电路，其特征在于，所述泡壳的材质为透光材质。
  9. 如权利要求8所述的LED灯驱动电路，其特征在于，所述泡壳的材质为玻璃。
  10. 一种照明设备，其特征在于，包括如权利要求1～9所述的LED灯驱动电路。
PCT/CN2015/088982 2015-07-01 2015-09-06 一种led灯的驱动电路及照明设备 WO2017000381A1 (zh)

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