CN110177407A - The illumination controller and lighting device of light-emitting component - Google Patents
The illumination controller and lighting device of light-emitting component Download PDFInfo
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- CN110177407A CN110177407A CN201910125377.2A CN201910125377A CN110177407A CN 110177407 A CN110177407 A CN 110177407A CN 201910125377 A CN201910125377 A CN 201910125377A CN 110177407 A CN110177407 A CN 110177407A
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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]
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- 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]
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- 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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
本发明提供发光元件的点亮控制装置以及照明装置。在发光元件的点亮控制装置中，对接通电源时流向保护元件的冲击电流的产生进行抑制。点亮控制装置用于进行光源的点亮控制，该光源包括发光元件和与该发光元件并联连接的保护元件，该点亮控制装置包括：电感性元件，其一端与连接于电源的电流路径连接；开关元件，其连接于电感性元件的另一端与基准电位端之间；连接于电感性元件的另一端与基准电位端之间的电容性元件；以及旁路用二极管，其一端与连接于电源的电流路径以及发光元件的阴极连接，另一端与电容性元件以及发光元件的阳极连接。
The present invention provides a lighting control device for a light emitting element and a lighting device. In the lighting control device of a light-emitting element, the generation of an inrush current flowing to a protective element when power is turned on is suppressed. The lighting control device is used to control the lighting of the light source. The light source includes a light emitting element and a protection element connected in parallel with the light emitting element. The lighting control device includes: an inductive element, one end of which is connected to the current path connected to the power supply ; a switching element, which is connected between the other end of the inductive element and the reference potential end; a capacitive element connected between the other end of the inductive element and the reference potential end; and a bypass diode, one end of which is connected to the The current path of the power supply is connected to the cathode of the light-emitting element, and the other end is connected to the capacitive element and the anode of the light-emitting element.
Description
技术领域technical field
本发明涉及用于对LED等发光元件的点亮状态进行控制的技术。The present invention relates to a technique for controlling the lighting state of light emitting elements such as LEDs.
背景技术Background technique
近些年来，在车辆用灯具等的各种照明装置中广泛使用LED等发光元件。在发光元件的点亮状态的控制中，例如使用包含DC-DC转换器的升压降压电路(例如，参照专利文献1)。并且，为了保护电路不受过电流的影响，还有时将保护元件(例如齐纳二极管)与发光元件并联连接。In recent years, light-emitting elements such as LEDs have been widely used in various lighting devices such as lamps for vehicles. For controlling the lighting state of the light emitting element, for example, a step-up/down circuit including a DC-DC converter is used (for example, refer to Patent Document 1). In addition, in order to protect the circuit from overcurrent, a protective element (such as a Zener diode) may be connected in parallel to the light emitting element.
然而，在使用升压降压电路对发光元件的点亮状态进行控制的情况下，在接通电源时过电流会流向与发光元件并联连接的保护元件，有时导致保护元件破损。其原因在于，在接通电源时，与升压降压电路的输出侧连接的电容器未被充入电荷，因此形成从电源在保护元件中传递而到达电容器的电流路径，从而产生冲击电流所致。However, when the lighting state of the light-emitting element is controlled using a step-up and step-down circuit, an overcurrent may flow to a protection element connected in parallel to the light-emitting element when the power is turned on, and the protection element may be damaged. The reason is that when the power is turned on, the capacitor connected to the output side of the step-up and step-down circuit is not charged with charge, so a current path is formed from the power supply through the protection element to reach the capacitor, thereby generating an inrush current. .
在先技术文献prior art literature
专利文献1：日本特开2013-109939号公报Patent Document 1: Japanese Patent Laid-Open No. 2013-109939
发明内容Contents of the invention
本发明的具体方式的目的之一在于，提供在发光元件的点亮控制装置中能够对接通电源时流向保护元件的冲击电流的产生进行抑制的技术。One of the objects of a specific aspect of the present invention is to provide a technology capable of suppressing the generation of inrush current flowing to a protection element when power is turned on in a lighting control device for a light emitting element.
本发明的一个方式的点亮控制装置(a)用于进行光源的点亮控制，所述光源包含发光元件和与该发光元件并联连接的保护元件，所述点亮控制装置包括：(b)电感性元件，其一端与连接于电源的电流路径连接；(c)开关元件，其连接于所述电感性元件的另一端与基准电位端之间；(d)电容性元件，其连接于所述电感性元件的另一端与所述基准电位端之间；以及(e)旁路用二极管，其一端与连接于所述电源的电流路径以及所述发光元件的阴极连接，另一端与所述电容性元件以及所述发光元件的阳极连接。The lighting control device (a) of one aspect of the present invention is used to control the lighting of a light source including a light emitting element and a protection element connected in parallel to the light emitting element, and the lighting control device includes: (b) an inductive element, one end of which is connected to a current path connected to a power supply; (c) a switching element, which is connected between the other end of the inductive element and a reference potential end; (d) a capacitive element, which is connected to the between the other end of the inductive element and the reference potential end; and (e) a bypass diode, one end of which is connected to the current path connected to the power supply and the cathode of the light emitting element, and the other end to the The capacitive element is connected to the anode of the light emitting element.
本发明的一个方式的照明装置包括：上述的点亮控制装置；以及光源，所述光源由该点亮控制装置进行控制。A lighting device according to one aspect of the present invention includes: the lighting control device described above; and a light source controlled by the lighting control device.
另外，在本说明书中，“连接”这一概念除了包含一电路要素与其他电路要素直接连接的情况之外，还包含通过其他要素的介入而间接连接的情况。In addition, in this specification, the concept of "connection" includes not only the case where a circuit element is directly connected to another circuit element, but also the case where it is indirectly connected through the intervention of other elements.
根据上述结构，在发光元件的点亮控制装置中，能够对接通电源时流向保护元件的冲击电流的产生进行抑制。According to the above configuration, in the lighting control device of the light emitting element, it is possible to suppress the generation of an inrush current flowing to the protection element when the power is turned on.
附图说明Description of drawings
图1是示出一个实施方式的车辆用灯具的整体结构的框图。FIG. 1 is a block diagram showing an overall configuration of a vehicle lamp according to an embodiment.
图2是示出一个实施方式的点亮控制电路的详细结构的电路图。FIG. 2 is a circuit diagram showing a detailed configuration of a lighting control circuit according to one embodiment.
图3是示出比较例的点亮控制电路的详细结构的电路图。3 is a circuit diagram showing a detailed configuration of a lighting control circuit of a comparative example.
标号说明Label description
1：控制基板，2：光源，3：电池，14：点亮控制电路，21：线圈，22：二极管，23：晶体管，24：电容器，25：旁路用二极管，31：发光元件，32：齐纳二极管。1: Control board, 2: Light source, 3: Battery, 14: Lighting control circuit, 21: Coil, 22: Diode, 23: Transistor, 24: Capacitor, 25: Bypass diode, 31: Light emitting element, 32: Zener diode.
具体实施方式Detailed ways
图1是示出一个实施方式的车辆用灯具的整体结构的框图。图示的车辆用灯具从电池3接收供电而进行光照射，并且包含控制基板1和光源2而构成。在电池3与控制基板1之间连接有继电器4。光源2包含1个以上的发光元件(例如LED)而构成。FIG. 1 is a block diagram showing an overall configuration of a vehicle lamp according to an embodiment. The illustrated vehicle lamp receives power from a battery 3 to emit light, and includes a control board 1 and a light source 2 . A relay 4 is connected between the battery 3 and the control board 1 . The light source 2 includes one or more light emitting elements (for example, LED).
控制基板1包含输入连接器11、反接保护电路12、输入滤波器13、点亮控制电路(点亮控制装置)14以及电流检测电路15而构成。输入连接器11是用于将控制基板11与电池3连接的连接器。反接保护电路12连接于电池3与点亮控制电路14之间，在点亮控制电路14与电池3反接时，为了保护点亮控制电路14而切断电压。输入滤波器13是使得杂音成分等不被输入到点亮控制电路14的滤波器电路。The control board 1 includes an input connector 11 , a reverse polarity protection circuit 12 , an input filter 13 , a lighting control circuit (lighting control device) 14 , and a current detection circuit 15 . The input connector 11 is a connector for connecting the control board 11 and the battery 3 . The reverse connection protection circuit 12 is connected between the battery 3 and the lighting control circuit 14 , and cuts off the voltage to protect the lighting control circuit 14 when the lighting control circuit 14 and the battery 3 are reversely connected. The input filter 13 is a filter circuit that prevents noise components and the like from being input to the lighting control circuit 14 .
点亮控制电路14用于从电池3接收供电而对光源2中包含的发光元件的点亮状态进行控制，并且包含DC-DC转换器等而构成。电流检测电路15对在光源2的发光元件中流过的电流进行检测。点亮控制电路14以由该电流检测电路15检测出的电流的大小一定的方式进行点亮控制。The lighting control circuit 14 is configured to receive power from the battery 3 to control the lighting state of the light emitting elements included in the light source 2 , and includes a DC-DC converter and the like. The current detection circuit 15 detects the current flowing through the light emitting element of the light source 2 . The lighting control circuit 14 performs lighting control so that the magnitude of the current detected by the current detection circuit 15 is constant.
图2是示出一个实施方式的点亮控制电路的详细结构的电路图。另外，为了简化说明而对于电流检测部15省略了图示。图示的点亮控制电路14包括线圈(电感性元件)21、二极管22、晶体管23、电容器(电容性元件)24以及旁路用二极管25而构成。至少包含上述各部件中的线圈21、晶体管23以及电容器24而构成了升压电路(DC-DC转换器)。FIG. 2 is a circuit diagram showing a detailed configuration of a lighting control circuit according to one embodiment. In addition, illustration of the current detection part 15 is abbreviate|omitted for simplification of description. The illustrated lighting control circuit 14 includes a coil (inductive element) 21 , a diode 22 , a transistor 23 , a capacitor (capacitive element) 24 , and a bypass diode 25 . A booster circuit (DC-DC converter) is constituted including at least the coil 21, the transistor 23, and the capacitor 24 among the above components.
线圈21的一端侧与连接于电池3的电流路径连接，另一端侧与二极管22的阳极以及晶体管23的漏极连接。二极管22的阳极侧与线圈21的另一端以及晶体管23的漏极连接，阴极侧与电容器24的一端侧以及光源2的发光元件31的阳极侧连接。One end of the coil 21 is connected to the current path connected to the battery 3 , and the other end is connected to the anode of the diode 22 and the drain of the transistor 23 . The anode side of the diode 22 is connected to the other end of the coil 21 and the drain of the transistor 23 , and the cathode side is connected to one end of the capacitor 24 and the anode side of the light emitting element 31 of the light source 2 .
晶体管23的栅极与未图示的控制部连接，漏极与线圈21和二极管22之间的中间连接点连接，源极与基准电位端(接地端)连接。由控制部对栅极提供控制信号。另外，在此作为开关元件的一例使用了场效应型晶体管，但也可以使用双极晶体管。The gate of the transistor 23 is connected to an unillustrated control unit, the drain is connected to an intermediate connection point between the coil 21 and the diode 22 , and the source is connected to a reference potential terminal (ground terminal). A control signal is supplied to the gate from the control unit. In addition, here, a field effect transistor is used as an example of a switching element, but a bipolar transistor may also be used.
电容器24的一端侧与二极管22和光源2的发光元件31之间的中间连接点连接，另一端侧与基准电位端连接。旁路用二极管25的一端侧与连接于电池3的电流路径连接，另一端侧与二极管22的另一端侧以及电容器24的一端侧连接。One end of the capacitor 24 is connected to an intermediate connection point between the diode 22 and the light emitting element 31 of the light source 2 , and the other end is connected to a reference potential terminal. One end of bypass diode 25 is connected to the current path connected to battery 3 , and the other end is connected to the other end of diode 22 and one end of capacitor 24 .
光源2包括发光元件31和与该发光元件31并联连接的齐纳二极管(保护元件)32而构成。发光元件31的阳极侧与点亮控制电路14连接，阴极侧与连接于电池3的电流路径连接。The light source 2 includes a light emitting element 31 and a Zener diode (protective element) 32 connected in parallel to the light emitting element 31 . The anode side of the light emitting element 31 is connected to the lighting control circuit 14 , and the cathode side is connected to a current path connected to the battery 3 .
齐纳二极管32的阳极侧与发光元件31的阴极侧连接，阴极侧与发光元件31的阳极侧连接。换句话说，齐纳二极管32的阳极侧与连接于电池3的电流路径连接，阴极侧与点亮控制电路14连接。The anode side of the Zener diode 32 is connected to the cathode side of the light emitting element 31 , and the cathode side is connected to the anode side of the light emitting element 31 . In other words, the anode side of the Zener diode 32 is connected to the current path connected to the battery 3 , and the cathode side is connected to the lighting control circuit 14 .
在对这样的点亮控制电路14接通电源时的电流的流动成为图中以粗虚线示出那样的流动。具体地说，从与电池3连接的电流路径流出的电流通过旁路用二极管25而到达电容器24，向电容器24充入电荷。通过向电容器24充入电荷，消除了光源2的齐纳二极管32的两端的电位差，因此能够防止过电流流过齐纳二极管32。The flow of current when the power is turned on to the lighting control circuit 14 is as shown by the thick dotted line in the figure. Specifically, the current flowing from the current path connected to the battery 3 reaches the capacitor 24 through the bypass diode 25 , and charges the capacitor 24 . By charging the capacitor 24 with charges, the potential difference between both ends of the Zener diode 32 of the light source 2 is eliminated, so that an overcurrent can be prevented from flowing through the Zener diode 32 .
图3是示出比较例的点亮控制电路的详细结构的电路图。与上述实施方式的点亮控制电路的不同之处在于，不包含旁路用二极管25。在对这种比较例的点亮控制电路14a接通电源时的电流的流动成为图中粗虚线示出那样的流动。具体地说，从与电池3连接的电流路径流出的电流通过光源2的齐纳二极管32而到达电容器24，向电容器24充入电荷。在向电容器24充入电荷前的期间内，过电流会瞬时流过齐纳二极管32，发生破损等的可能性增高。3 is a circuit diagram showing a detailed configuration of a lighting control circuit of a comparative example. The difference from the lighting control circuit of the above-mentioned embodiment is that the bypass diode 25 is not included. The flow of current when the lighting control circuit 14a of this comparative example is powered on is as shown by the thick dotted line in the figure. Specifically, the current flowing from the current path connected to the battery 3 reaches the capacitor 24 through the Zener diode 32 of the light source 2 , and charges the capacitor 24 . During the period before the capacitor 24 is charged with electric charge, an overcurrent flows instantaneously through the Zener diode 32 , which increases the possibility of damage or the like.
根据以上那样的实施方式，在发光元件的点亮控制装置中，能够对接通电源时流向保护元件(齐纳二极管)的冲击电流的产生进行抑制。According to the above embodiments, in the lighting control device of the light emitting element, it is possible to suppress the generation of an inrush current flowing to the protection element (zener diode) when the power is turned on.
另外，本发明并不限定于上述的实施方式的内容，在本发明的主旨的范围内能够进行各种变形并实施。例如，在上述的实施方式中示出的点亮控制电路中的升压电路的结构仅为一例，并不限定于此。并且，光源所包含的发光元件也可以是多个。并且，作为照明装置的一例示出了车辆用灯具，但是照明装置的用途并不限定于此。In addition, this invention is not limited to the content of the said embodiment, Various deformation|transformation can be implemented within the range of the summary of this invention. For example, the configuration of the booster circuit in the lighting control circuit shown in the above-mentioned embodiments is merely an example, and is not limited thereto. Furthermore, a plurality of light emitting elements may be included in the light source. In addition, a vehicle lamp is shown as an example of the lighting device, but the application of the lighting device is not limited thereto.
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| JP2018-028523 | 2018-02-21 | ||
| JP2018028523A JP6971878B2 (en) | 2018-02-21 | 2018-02-21 | Light emitting element lighting control circuit |
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| US20160358995A1 (en) * | 2012-08-02 | 2016-12-08 | Samsung Display Co., Ltd. | Organic light emitting diode display |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2019145339A (en) | 2019-08-29 |
| CN110177407B (en) | 2024-05-14 |
| JP6971878B2 (en) | 2021-11-24 |
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