WO2021138862A1 - 一种照明装置驱动器 - Google Patents

一种照明装置驱动器 Download PDF

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Publication number
WO2021138862A1
WO2021138862A1 PCT/CN2020/071065 CN2020071065W WO2021138862A1 WO 2021138862 A1 WO2021138862 A1 WO 2021138862A1 CN 2020071065 W CN2020071065 W CN 2020071065W WO 2021138862 A1 WO2021138862 A1 WO 2021138862A1
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Prior art keywords
lighting device
modules
device driver
voltage regulator
dimming control
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PCT/CN2020/071065
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English (en)
French (fr)
Inventor
毛竹
秦蜀懿
方敏
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卡任特照明解决方案有限公司
毛竹
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Application filed by 卡任特照明解决方案有限公司, 毛竹 filed Critical 卡任特照明解决方案有限公司
Priority to US17/787,994 priority Critical patent/US20230029021A1/en
Priority to PCT/CN2020/071065 priority patent/WO2021138862A1/zh
Publication of WO2021138862A1 publication Critical patent/WO2021138862A1/zh

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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]
    • H05B45/10—Controlling the intensity of the light
    • 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
    • H05B45/31—Phase-control 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
    • H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
    • H05B39/04—Controlling
    • H05B39/041—Controlling the light-intensity of the source
    • H05B39/044—Controlling the light-intensity of the source continuously
    • 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
    • H05B47/18—Controlling the light source by remote control via data-bus transmission
    • H05B47/183—Controlling the light source by remote control via data-bus transmission using digital addressable lighting interface [DALI] communication protocols
    • 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]
    • H05B45/375—Switched mode power supply [SMPS] using buck topology
    • 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]
    • H05B45/385—Switched mode power supply [SMPS] using flyback topology
    • 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
    • H05B47/18—Controlling the light source by remote control via data-bus transmission

Definitions

  • the present invention relates to the field of lighting, and more specifically, the present invention relates to a dimmable driver for keeping a plurality of LEDs with substantially the same brightness.
  • LED Light Emitting Diode
  • LED Light Emitting Diode
  • LED lights are usually connected in parallel, and boost Boost topology modules and half-bridge circuits are usually used in many LED drivers.
  • the driver can simultaneously dim or dim the brightness of multiple LED lights through dimming technology (for example, PWM dimming).
  • dimming technology for example, PWM dimming
  • the present invention relates to a lighting device driver, including: a filter for filtering noise; a rectifier for converting an AC voltage into a DC voltage; a plurality of voltage regulator integrated circuit (IC) modules,
  • the plurality of voltage regulator IC modules are directly or indirectly connected to the rectifier, and each of the plurality of voltage regulator IC modules is used to connect with a separate lighting device, so that the plurality of voltage regulator ICs
  • Each of the modules can independently control the current input to the lighting device connected to it.
  • the plurality of voltage regulator IC modules are step-down Buck modules or flyback FlyBack modules.
  • the lighting device driver further includes a dimming control, and the dimming control is coupled with each of the plurality of voltage regulator IC modules to send a dimming control signal to all Each of the plurality of voltage regulator IC modules.
  • the dimming control signal when used to change the brightness of each of the plurality of lighting devices, the dimming signal is sent to each of the plurality of voltage regulator IC modules.
  • each voltage regulator IC module independently inputs substantially the same current to the lighting device connected thereto, so that the brightness of each lighting device in the plurality of lighting devices is substantially the same.
  • the dimming control is isolated dimming control.
  • the isolation dimming control is a magnetic dimming control or a dimming control based on an optical coupler.
  • control signal is in the form of a voltage or based on the DALI protocol.
  • each of the voltage regulator IC modules includes a metal oxide semiconductor field effect transistor MOSFET.
  • the lighting device driver does not include a half bridge.
  • the lighting device driver as described above is used to drive a plurality of LED lamps connected in parallel.
  • the LED lamps have different sizes and/or powers.
  • the lighting device driver as described above further includes a boost Boost module for boosting the rectified voltage.
  • the Boost module is coupled between the rectifier and the plurality of voltage regulator IC modules.
  • the rectifier is a rectifier bridge.
  • Fig. 1 shows an exemplary block diagram 100 of a lighting device and its driver in the prior art
  • FIG. 2 shows a more detailed circuit diagram 200 of the lighting device and its driver in the prior art
  • Fig. 3 shows an exemplary block diagram 300 of a lighting device and a driver thereof according to an embodiment of the present invention
  • FIG. 4 shows a more detailed circuit diagram 400 of a lighting device and its driver according to an embodiment of the present invention
  • Fig. 5 shows an exemplary block diagram 500 of a lighting device and a driver thereof according to another embodiment of the present invention
  • FIG. 6 shows a more detailed circuit diagram 600 of a lighting device and its driver according to another embodiment of the present invention.
  • An embodiment is an implementation or an example.
  • Reference in the specification to "embodiments,” “one embodiment,” “some embodiments,” “various embodiments,” or “other embodiments” means that specific features, configurations, or characteristics described in conjunction with the embodiments are included in this In at least some embodiments of the technology, but not necessarily all embodiments.
  • the various appearances of "an embodiment,” “one embodiment,” or “some embodiments” do not necessarily all refer to the same embodiments. Elements or aspects from one embodiment may be combined with elements or aspects of another embodiment.
  • the elements in some cases may each have the same reference number or different reference numbers to indicate that the represented elements may be different and/or similar.
  • the elements can be flexible enough to have different implementations and work with some or all of the systems shown or described herein.
  • the various elements shown in the various figures of the present disclosure may be the same or different. Which is called the first element and which is called the second element is arbitrary.
  • Fig. 1 shows an exemplary block diagram 100 of a lighting device and its driver in the prior art.
  • the circuit block diagram shown in FIG. 1 includes: a power supply 102, a filter 104, a rectifier 106, a boost module 108, a half bridge 110, a dimming control 120, and n parallel lighting devices 112-1 to 112 -n.
  • the dimming control 120 may be connected to the half bridge 110, so that the half bridge 110 can adjust the current output to each lighting device according to the dimming signal sent by the dimming control 120, thereby realizing dimming.
  • the lighting device is, for example, an LED lamp.
  • the circuit also includes some other components, such as inductor L, resistor R1 and so on.
  • FIG. 2 shows a more detailed circuit diagram 200 of the lighting device and its driver in the prior art.
  • component 202 is a power supply
  • component 204 is a filter
  • component 206 is a rectifier bridge in a specific form of a rectifier, which can be used to convert AC voltage into DC voltage.
  • C1 is a filter capacitor.
  • L1 is the inductance of the boost topology.
  • the "boost control" in the picture is a control integrated circuit for Boost topology.
  • Q1 is the Boost topology switch.
  • Q1 may be an on/off metal oxide semiconductor field effect transistor MOSFET.
  • D2 is a flywheel diode in Boost topology.
  • C2 can be a capacitor, for example to reduce voltage ripple.
  • the half-bridge module in Figure 1 includes "half-bridge control" and one or more topology switches Q2 and Q3 (which can also be on/off MOSFETs). It also includes a plurality of parallel lighting devices (for example, LEDs) 212-1 to 212-n. Similarly, the circuit also includes other components, such as inductor L2, resistor R2 and so on.
  • the half-bridge 110 can adjust the output to the lighting device (such as LED) 112 according to the dimming signal. -1 to 112-n current. Since the lighting devices 112-1 to 112-n are connected in parallel, and due to factors such as manufacturing errors of each lamp, the actual current flowing through each LED lamp may not be the same, resulting in different light brightness. This is more obvious when the brightness of the LED light is adjusted to a darker level. If these light-emitting devices are at a lower temperature, this phenomenon will be further intensified.
  • the lighting device such as LED
  • the current of each lighting device may increase.
  • the use of a half-bridge also increases the manufacturing cost of the entire circuit. These may bring a bad experience to users. It is desirable to have a lighting device driver so that the light-emitting brightness of each lighting device can be basically the same during dimming, and the cost can be further reduced.
  • Fig. 3 shows an exemplary block diagram 300 of a lighting device and a driver thereof according to an embodiment of the present invention.
  • the circuit block diagram according to an embodiment of the present invention may include one or more of the following: power supply 302; filter 304, which can be used to filter out noise (for example, filter out noise caused by high frequency High-frequency noise generated by the switch), which can improve one or more of the electromagnetic interference (EMI), power factor (PF), and total harmonic distortion (THD) of the circuit; the rectifier 306 can be used to convert AC voltage into DC voltage, in one embodiment, the rectifier 306 can be a rectifier bridge; a boost module 308 can be used to boost the rectified voltage and can be used to output a relatively constant voltage; dimming control 320; and lighting Devices (such as LED lights) 312-1 to 312-n, in one embodiment, these lighting devices may be connected in parallel; and may further include one or more voltage regulators coupled with a boost module 308 Integrated circuit (IC) modules 330-1 to 330-n.
  • each of the voltage regulator integrated circuit (IC) modules 330-1 to 330-n may include a Buck module or a FlyBack module.
  • Each of the voltage regulator IC modules 330-1 to 330-n may be followed by a separate lighting device (for example, one of the lighting devices 312-1 to 312-n).
  • each of the voltage regulator IC modules 330-1 to 330-n may be coupled to the dimming control 320, so that the dimming control 320 can send the dimming control signal to a plurality of voltage regulator IC modules 330- 1 to 330-n each.
  • the Buck module or FlyBack modules 330-1 to 330-n may be Buck modules or FlyBack modules commonly understood and used in the art.
  • each of the step-down Buck module or the flyback FlyBack modules 330-1 to 330-n may be an integrated circuit module, and the integrated circuit module may include a metal oxide semiconductor field effect transistor MOSFET.
  • the integrated circuit module may also include one or more diodes, a step-down Buck module or a corresponding control circuit of a flyback FlyBack module, as those skilled in the art can understand.
  • each of a plurality of voltage regulator IC modules 330-1 to 330-n can be generated using a Boost module
  • the voltage independently loads and controls the current input to the lighting device (such as LED) connected to it.
  • each of the voltage regulator IC modules 330-1 to 330-n can independently input substantially the same current to the lighting device connected to it, so that the brightness of each lighting device is basically the same .
  • this independent control mechanism makes it suitable for each job
  • the current of the lighting device can still be kept basically the same, so that the brightness of the lighting device is also kept basically the same without being affected by changes in the number of loads.
  • substantially the same current and substantially the same brightness can be interpreted as a change in the current or the brightness within a certain range that most users will not notice, thereby enhancing the user experience.
  • the dimming command signal transmitted to the dimming control 320 may be in the form of voltage or based on the DALI protocol.
  • the voltage may be in the range of 0-10V.
  • the dimming control 320 may be an isolated dimming control, which isolates the dimming control signal from the main topology (for example, Boost topology, Buck topology, FlyBack topology). Isolation can adopt magnetic dimming control or dimming control based on optocoupler.
  • the lighting device driver according to the embodiment of the present invention may not include the half bridge, and thus the circuit manufacturing cost may be saved.
  • the Buck and FlyBack suggested by the present invention are relatively mature integrated circuits, which further reduces the circuit manufacturing cost.
  • these lighting devices e.g., LEDs
  • these lighting devices may have different sizes and/or powers. Since an independent voltage regulator IC module is used to control the current for each lighting device, even if each lighting device has a different size and/or power, the dimming brightness of each lighting device can be basically the same. As long as the applied electrical parameters are within the rated range of the lighting device. Further, even when the brightness of the lighting device is adjusted to be dark, the brightness of each lighting device can be kept substantially the same.
  • FIG. 4 shows a more detailed circuit diagram 400 of the lighting device and its driver according to an embodiment of the present invention.
  • the component 402 is a power supply
  • the component 404 is a filter
  • the component 406 is a rectifier bridge in a specific form of a rectifier, which can be used to convert an AC voltage into a DC voltage.
  • C1 is a filter capacitor.
  • L1 is the inductance of the boost topology.
  • the "boost control" in the picture is a control integrated circuit for Boost topology.
  • Q1 is the Boost topology switch.
  • Q1 may be an on/off metal oxide semiconductor field effect transistor MOSFET.
  • D2 is a flywheel diode in Boost topology.
  • C2 can be an electrolytic capacitor to reduce voltage ripple.
  • the circuit in FIG. 4 also includes a plurality of voltage regulator IC modules, such as a plurality of step-down BucK modules 430-1 to 430-n or a plurality of flyback FlyBack modules 430-1 to 430-n, which Each of them is used to independently control the current input to the lighting device (one of 412-1 to 412-n) connected to it. Further, it also includes a dimming control 420, which is connected to each of a plurality of step-down BucK modules or a plurality of flyback FlyBack modules 430-1 to 430-n.
  • FIG. 5 shows an exemplary block diagram 500 of a lighting device and a driver thereof according to another embodiment of the present invention
  • FIG. 6 shows a more detailed circuit of a lighting device and a driver thereof according to another embodiment of the present invention Schematic 600.
  • the circuit block diagram in FIG. 5 is substantially the same as the circuit block diagram in FIG. 3, except that the boost topology module may not be included in FIG. 5.
  • the circuit schematic diagram in FIG. 6 is substantially the same as the circuit schematic diagram in FIG. 4, except that the boost topology module may not be included in FIG. 6.
  • the circuits in FIGS. 5 and 6 can also be used to control the brightness of each lighting device to remain substantially the same.
  • LEDs are mainly used to show the circuit structure in the description of the present invention, LEDs are only one of various lighting devices that can be used in the design concept of the present invention. Therefore, other lighting devices can also be used, and the LED is only exemplary and should not be construed as a limitation of the present invention.

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  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

本发明涉及一种照明装置驱动器，包括：滤波器，所述滤波器用于滤除噪音；整流器，所述整流器用于将交流电压转换成直流电压；多个电压调节器集成电路（IC）模块，所述多个电压调节器IC模块直接或间接地连接到所述整流器，所述多个电压调节器IC模块中的每一个用于与单独的照明装置连接，使得所述多个电压调节器IC模块中的每一个能够独立地控制输入到与之相连的照明装置的电流。

Description

一种照明装置驱动器 技术领域
本发明涉及照明领域，并且更具体地，本发明涉及一种用于保持多个LED发光亮度基本相同的可调光驱动器。
背景技术
目前，LED(发光二极管)因其自身的各项优点，例如尺寸小，发光效率高，能耗低，寿命长等，正逐渐成为主流照明应用之一。越来越多的LED光源正在取代传统的光源。
LED灯通常采用并联的连接方式，并且许多LED驱动器中通常使用升压Boost拓扑模块和半桥电路。驱动器可以通过调光技术(例如，PWM调光)来同时调亮或调暗多个LED灯的亮度。当驱动器将多个并联的LED灯亮度调到较暗时，将每个灯泡保持在基本相同的亮度是更加困难的，尤其是当LED灯在较低的温度下工作时。这种不同亮度的LED发光对于用于而言并不是一种好的体验。
因此，目前需要一种改进的可调光驱动器，使得能够将每个LED灯的亮度调成基本相同，尤其是在将LED灯调成较暗的情况下。
发明内容
本发明涉及一种照明装置驱动器，包括：滤波器，所述滤波器用于滤除噪音；整流器，所述整流器用于将交流电压转换成直流电压；多个电压调节器集成电路(IC)模块，所述多个电压调节器IC模块直接或间接地连接到所述整流器，所述多个电压调节器IC模块中的每一个用于与单独的照明装置连接，使得所述多个电压调节器IC模块中的每一个能够独立地控制输入到与之相连的照明装置的电流。
如上所述的照明装置驱动器，所述多个电压调节器IC模块是降压Buck模块或反激FlyBack模块。
如上所述的照明装置驱动器，所述照明装置驱动器进一步包括调光控制，并且所述调光控制与所述多个电压调节器IC模块中的每一个耦合，以便将调光控制信号发送到所述多个电压调节器IC模块中的每一个。
如上所述的照明装置驱动器，当所述调光控制信号用于使得多个照明装置中的每一个的亮度变化时，所述调光信号发送到所述多个电压调节器IC模块中的每一个，并且每个电压调节器IC模块独立地将基本相同的电流输入到与之相连的照明装置，使得所述多个照明装置中的每个照明装置的亮度基本相同。
如上所述的照明装置驱动器，所述调光控制是隔离调光控制。
如上所述的照明装置驱动器，所述隔离调光控制是磁调光控制或基于光学耦合器的调光控制。
如上所述的照明装置驱动器，所述控制信号以电压的形式或基于DALI协议。
如上所述的照明装置驱动器，所述电压调节器IC模块中的每一个包括金属氧化物半导体场效应晶体管MOSFET。
如上所述的照明装置驱动器，所述照明装置驱动器不包括半桥。
如上所述的照明装置驱动器，所述照明装置驱动器用于驱动多个并联的LED灯。
如上所述的照明装置驱动器，所述LED灯具有不同的尺寸和/或功率。
如上所述的照明装置驱动器，进一步包括升压Boost模块，所述Boost模块用于使经整流的电压升压。
如上所述的照明装置驱动器，所述Boost模块耦合在所述整流器和所述多个电压调节器IC模块之间。
如上所述的照明装置驱动器，所述整流器是整流桥。
本发明内容旨在提供对本公开中所描述的主题的概览。并不旨在提供对在下面的所附附图和说明书内详细描述的装置和/或方法的排他的或穷尽的解释。在下面的所附附图和说明书中阐述了本公开的一个或多个方面的细节。
附图说明
参考附图，根据对本公开的各实施例的描述，可以更好地理解本公开，其中：
图1示出了现有技术中照明装置及其驱动器的示例性框图100；
图2示出了现有技术中照明装置及其驱动器的更详细的电路示意图200；
图3示出了根据本发明的一个实施例的照明装置及其驱动器的示例性框图300；
图4示出了根据本发明的一个实施例的照明装置及其驱动器的更详细的电路示意图400；
图5示出了根据本发明的另一个实施例的照明装置及其驱动器的示例性框图500；
图6示出了根据本发明的另一个实施例的照明装置及其驱动器的更详细的电路示意图600。
具体实施方式
除非另外定义，否则在本文中所使用的技术和科学术语应具有与本公开所属领域的普通技术人员所通常理解的相同含义。本申请中的术语“第一”、“第二”等并不意味着任何顺序、数量或重要性，而是仅用于区分不同的组件。同样，术语“一”、“一个”等不表示对数量的限制，而是表示存在至少一个。术语“包含”、“包含有”、“包括”、“包括有”等意味着“包含”、“包含有”、“包括”和“包括有”前面的元件或对象覆盖各元件或对象以及在“包含”、“包含有”、“包括”和“包括有”之后示出的其等同物，但不排除其他元件或对象。术语“耦合”、“连接”等不限于物理地或机械地连接，而是可以包括电连接，无论是直接还是间接。
实施例是实现或示例。说明书中对“实施例”、“一个实施例”、“一些实施例”、“各种实施例”或“其他实施例”的引用意味着结合实施例描述的特定特征、构造或特性包括在本技术的至少一些实施例中，但不必 是全部实施例。“实施例”、“一个实施例”、或“一些实施例”的各种出现并不一定都指代相同的实施例。来自一个实施例的元素或方面可与另一实施例的元素或方面组合。
并非在此本文中描述和展示的所有组件、特征、结构、特性等都需要包括在特定实施例或多个实施例中。例如，如果说明书陈述组件、特征、结构或特性“可以”、“可能”、“可”或“能够”被包括，则那个特定组件、特征、结构或特性不要求被包括。如果说明书或权利要求书提及一要素或一个要素，则那并非意味着仅存在一个要素。如果说明书或权利要求书提及“附加”要素，则那并不排除存在多于一个的附加要素。
应注意的是，尽管已经参考特定实现方式对一些实施例进行了描述，但根据一些实施例其他实现方式是可能的。另外，在附图中展示和/或在本文中描述的电路元素或其他特征的布置和/或顺序不需要以所展示和描述的特定方式布置。根据一些实施例，许多其他布置是可能的。
在本公开的各个图中示出的每个系统中，一些情况下的元素可以各自都具有相同的参考号或不同的参考号以表明所表示的元素可以是不同和/或类似的。然而，元素可以足够灵活到具有不同的实现方式并与在本文中示出或描述的系统的一些或全部一起工作。本公开的各个图中示出的各种元素可以是相同的或不同的。哪个称为第一元素和哪个称为第二元素是任意的。
图1示出了现有技术中照明装置及其驱动器的示例性框图100。如图1所示的电路框图中包括：电源102，滤波器104，整流器106，升压(Boost)模块108，半桥110，调光控制120，以及n个并联的照明装置112-1至112-n。调光控制120可连接到半桥110，使得半桥110能够根据调光控制120发出的调光信号而相应地调整输出到每个照明装置的电流，从而实现调光。照明装置例如是LED灯。此外，电路中还包括了其他的一些部件，例如电感L，电阻R1等。
图2示出了现有技术中照明装置及其驱动器的更详细的电路示意图200。图1中部件202为电源，部件204为滤波器，部件206为整流器的一种具体形式整流桥，可用于将交流电压转换成直流电压。C1是滤波电容器。 L1是升压(Boost)拓扑电感。图中的“升压控制”是用于Boost拓扑的控制集成电路。Q1是Boost拓扑开关。作为一个示例，Q1可以是打开/关闭(on/off)金属氧化物半导体场效应晶体管MOSFET。D2是Boost拓扑续流(fly wheel)二极管。C2可以是电容器，例如用于减少电压纹波(ripple)。图1中的半桥模块包括“半桥控制”，以及一个或多个拓扑开关Q2、Q3(也可以是打开/关闭(on/off)金属氧化物半导体场效应晶体管MOSFET)。还包括多个并联的照明装置(例如，LED)212-1至212-n。类似地，电路中还包括了其他的一些部件，例如电感L2，电阻R2等。
如上文所提及的，以图1为例，当调光控制120发送调光信号给半桥110时，半桥110能够根据该调光信号来相应地调整输出到照明装置(例如LED)112-1至112-n的电流。由于照明装置112-1至112-n采取并联的连接方式，并且由于例如每个灯的制造误差等因素，流过每个LED灯的实际电流可能并不相同，从而导致不同的灯光亮度。这在LED灯亮度被调到较暗时更为明显。如果这些发光装置处于较低的温度时，还会进一步加强这种现象。此外，当负载发生变化时，例如，负载数量由n减少为n-1，n-2，n-3个时，每个照明装置的电流可能会升高。而且，半桥的使用也使得整个电路的制造成本提高。这些都可能会给用户带来不好的体验。期望有一种照明装置驱动器，使得在调光时每个照明装置的发光亮度能够基本相同，并且成本能够进一步降低。
图3示出了根据本发明的一个实施例的照明装置及其驱动器的示例性框图300。如图3中所示，根据本发明的一个实施例电路框图中可以包括以下各项中的一项或多项：电源302；滤波器304，可用于滤除噪音(例如，滤除由高频开关产生的高频噪音)，从而可改善电路的电磁干扰(EMI)、功率因素(PF)、总谐波失真(THD)中的一项或多项；整流器306，可用于将交流电压转换成直流电压，在一个实施例中，整流器306可以是整流桥；升压(Boost)模块308，可用于使经整流的电压升压，并且可用于输出相对恒定的电压；调光控制320；以及照明装置(例如LED灯)312-1至312-n，在一个实施例中，这些照明装置可以是并联的；并且还可进一步包括与升压(Boost)模块308耦合的一个或多个电压调节器集成电路(IC)模块330-1 至330-n。在一个实施例中，电压调节器集成电路(IC)模块330-1至330-n中的每一个可以包括降压(Buck)模块或反激(FlyBack)模块。电压调节器IC模块330-1至330-n中的每一个可后接单独的照明装置(例如，照明装置312-1至312-n中的一个)。进一步地，电压调节器IC模块330-1至330-n中的每一个可耦合到调光控制320，以便调光控制320可以将调光控制信号发送到多个电压调节器IC模块中330-1至330-n的每一个。在一个非限制性示例中，降压Buck模块或反激FlyBack模块330-1至330-n可以是本领域中通常理解并使用的降压Buck模块或反激FlyBack模块。例如，降压Buck模块或反激FlyBack模块330-1至330-n中的每一个可以是集成电路模块，该集成电路模块可包括金属氧化物半导体场效应晶体管MOSFET。该集成电路模块还可以包括一个或多个二极管、降压Buck模块或反激FlyBack模块相应的控制电路，如本领域技术人员可以理解的。
根据本发明的实施例，多个电压调节器IC模块330-1至330-n中的每一个(例如，降压BucK模块或多个反激FlyBack模块中的每一个)能够使用经由Boost模块产生的电压独立地加载并控制输入到与之相连的照明装置(例如LED)的电流。例如，当调光控制320发出调光控制信号并将调光控制信号发送到多个电压调节器IC模块330-1至330-n中的每一个(例如，降压BucK模块或多个反激FlyBack模块中的每一个)时，每个电压调节器IC模块330-1至330-n中可以独立地将基本相同的电流输入到与之相连的照明装置，使得每个照明装置的亮度基本相同。根据本发明设计的这种电路，当照明负载减少时，例如，负载数量由n减少为n-1，n-2，n-3个时，这种独立控制的机制使得用于每个工作的照明装置的电流仍能保持基本相同，从而使得照明装置的亮度也保持基本相同，而可以不受负载数量变化的影响。在本发明中，基本相同的电流以及基本相同的亮度可以被解释为，该电流或该亮度的一定范围内的变化使得大部分用户并不会察觉到，从而提升用户体验。
在一个实施例中，传输到调光控制320的调光指令信号可以以电压的形式或基于DALI协议。作为一个非限制性示例，电压可以在0～10V的范围内。在一个实施例中，调光控制320可以是隔离调光控制，其将调光控制信号与主要的拓扑(例如Boost拓扑、Buck拓扑、FlyBack拓扑)隔离开来。隔离可以 采取磁调光控制或基于光耦合器的调光控制方式。
如上所述，根据本发明的实施例的照明装置驱动器可以不包括半桥，因此可以节约电路制造成本。而本发明所建议使用的Buck和FlyBack是较成熟的集成电路，进一步降低了电路制造成本。此外，这些照明装置(例如，LED)可具有不同的尺寸和/或功率。由于利用独立的电压调节器IC模块来控制用于每个照明装置的电流，因此，即便每个照明装置具有不同的尺寸和/或功率，每个照明装置的调光亮度也能实现基本相同，只要所施加的电参数在该照明装置的额定范围内。进一步地，即便在照明装置的亮度调整到较暗的情况下，各个照明装置的亮度也能保持基本相同。
图4示出了根据本发明的一个实施例的照明装置及其驱动器的更详细的电路示意图400。图4中示出的与图3相同的部件不再赘述。图4中部件402为电源，部件404为滤波器，部件406为整流器的一种具体形式整流桥，可用于将交流电压转换成直流电压。C1是滤波电容器。L1是升压(Boost)拓扑电感。图中的“升压控制”是用于Boost拓扑的控制集成电路。Q1是Boost拓扑开关。作为一个示例，Q1可以是打开/关闭(on/off)的金属氧化物半导体场效应晶体管MOSFET。D2是Boost拓扑续流(fly wheel)二极管。C2可以是电解质电容器，用于减少电压纹波(ripple)。如上所述的，图4中的电路还包括多个电压调节器IC模块，例如多个降压BucK模块430-1至430-n或多个反激FlyBack模块430-1至430-n，它们中的每一个用于独立地控制输入到与之相连的照明装置(412-1至412-n中的一个)的电流。进一步地，还包括调光控制420，其连接到多个降压BucK模块或多个反激FlyBack模块430-1至430-n中的每一个。
图5示出了根据本发明的另一个实施例的照明装置及其驱动器的示例性框图500，并且图6示出了根据本发明的另一个实施例的照明装置及其驱动器的更详细的电路示意图600。图5中的电路框图与图3中的电路框图大体相同，除了图5中可以不包括升压(Boost)拓扑模块之外。类似地，图6中的电路示意图与图4中的电路示意图大体相同，除了图6中可以不包括升压(Boost)拓扑模块之外。对应相同或者相似的部件不再赘述。因此，图5和图6中的电路也能够用于控制每个照明装置的亮度保持基本相同。
尽管本发明的描述中主要以LED来示出电路结构，但是LED仅为可用于本发明的设计思想的各种照明装置中的一种。因此还可以使用其他照明装置，LED仅为示例性的，而不应被理解为是对本发明的限制。
本技术不限于在此列出的特定细节。实际上，受益于此公开的本领域技术人员将理解，许多来自前述描述和附图的其他变型可以在本技术的范围内进行。从而，是包括其任何修改的所附权利要求书定义了本技术的范围。

Claims (14)

  1. 一种照明装置驱动器，包括：
    滤波器，所述滤波器用于滤除噪音；
    整流器，所述整流器用于将交流电压转换成直流电压；
    多个电压调节器集成电路(IC)模块，所述多个电压调节器IC模块直接或间接地连接到所述整流器，所述多个电压调节器IC模块中的每一个用于与单独的照明装置连接，使得所述多个电压调节器IC模块中的每一个能够独立地控制输入到与之相连的照明装置的电流。
  2. 如权利要求1所述的照明装置驱动器，其特征在于，所述多个电压调节器IC模块是降压Buck模块或反激FlyBack模块。
  3. 如权利要求1或2所述的照明装置驱动器，其特征在于，所述照明装置驱动器进一步包括调光控制，并且所述调光控制与所述多个电压调节器IC模块中的每一个耦合，以便将调光控制信号发送到所述多个电压调节器IC模块中的每一个。
  4. 如权利要求3所述的照明装置驱动器，其特征在于，当所述调光控制信号用于使得多个照明装置中的每一个的亮度变化时，所述调光信号发送到所述多个电压调节器IC模块中的每一个，并且每个电压调节器IC模块独立地将基本相同的电流输入到与之相连的照明装置，使得所述多个照明装置中的每个照明装置的亮度基本相同。
  5. 如权利要求3所述的照明装置驱动器，其特征在于，所述调光控制是隔离调光控制。
  6. 如权利要求5所述的照明装置驱动器，其特征在于，所述隔离调光控制是磁调光控制或基于光学耦合器的调光控制。
  7. 如权利要求3所述的照明装置驱动器，其特征在于，所述控制信号以电压的形式或基于DALI协议。
  8. 如权利要求1或2所述的照明装置驱动器，其特征在于，所述电压调节器IC模块中的每一个包括金属氧化物半导体场效应晶体管MOSFET。
  9. 如权利要求1或2所述的照明装置驱动器，其特征在于，所述照明装置驱动器不包括半桥。
  10. 如权利要求1或2所述的照明装置驱动器，其特征在于，所述照明装置驱动器用于驱动多个并联的LED灯。
  11. 如权利要求10所述的照明装置驱动器，其特征在于，所述LED灯具有不同的尺寸和/或功率。
  12. 如权利要求1或2所述的照明装置驱动器，其特征在于，进一步包括升压Boost模块，所述Boost模块用于使经整流的电压升压。
  13. 如权利要求12所述的照明装置驱动器，其特征在于，所述Boost模块耦合在所述整流器和所述多个电压调节器IC模块之间。
  14. 如权利要求1或2所述的照明装置驱动器，其特征在于，所述整流器是整流桥。
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