JP4940372B1 - Equipment for LED light bulb energization - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce an influence of noise when an LED bulb is used in connection with a commercial power supply. <P>SOLUTION: An adapter 10 for the LED bulb is used by being inserted between the LED bulb 100 and a socket 90 for an electric bulb. The socket 90 for the electric bulb is embedded in a ceiling 200 of a house of an ordinary family, for instance, and connected with a power cable 300 of a commercial AC 100V. The adapter 10 for an LED bulb and the LED bulb 100 are connected with the socket 90 for an electric bulb, and the LED bulb 100 can be made to emit light. A noise filter for removing high-frequency noise generated by the LED bulb 100 in a route of wiring where an adapter screw and an adapter recessed section center electrode are connected with an adapter base and an adapter center electrode is arranged in the adapter 10 for the LED bulb. <P>COPYRIGHT: (C)2013,JPO&amp;INPIT

Description

  The present invention relates to a configuration of an LED bulb energizing device for connecting an LED bulb to a commercial AC power source, such as a bulb socket and an adapter.

  Incandescent light bulbs have been widely used for ordinary household lighting because of their high illuminance and economy. However, in recent years, the large power consumption has become a problem. For this reason, instead of an incandescent light bulb, an LED light bulb using an LED (Light Emitting Diode) element that has low power consumption and can obtain an illuminance equivalent to that of an incandescent light bulb as a light source has been recently used.

  Incandescent light bulbs use a filament sealed in a vacuum as a light source, whereas in LED light bulbs, diodes (LED elements) that use pn junctions of compound semiconductors serve as a light source. It is very different from a light bulb. The configuration of the LED bulb is described in, for example, Patent Document 1 and Non-Patent Document 1. First, as compared with the filament in the incandescent bulb, the LED in the LED bulb has higher directivity of light emission. For this reason, in order to replace the incandescent light bulb used as the diffusion light source for illumination, the plurality of LED elements are appropriately arranged so as to emit divergent light as a whole.

  The incandescent lamp has a simple configuration in which a current is passed through the filament, and the filament, which is a simple resistor, serves as the light emission source. Here, as a current flowing through the filament, a commercial AC 100V AC current can be used as it is. On the other hand, the LED element serving as the light emission source of the LED bulb is a diode using a pn junction of a compound semiconductor, and light emission in the case where a forward bias current is applied thereto is used. For this reason, the voltage directly applied to the LED element needs to be a direct current, and the voltage is about several volts at most, which is lower than 100 V of the commercial power source.

  However, it is not desirable to provide a dedicated direct-current power supply for an LED bulb in a general home, and it is preferable that an incandescent bulb used in the past can be replaced with an LED bulb as it is. For this reason, as described in, for example, Non-Patent Document 1 and Patent Document 1, generally, a small power circuit for converting commercial AC100V into a DC low voltage is provided inside the LED bulb together with the LED element. It has been. Thereby, the LED light bulb which can be connected and used as it is with the socket for light bulbs connected to AC100V commercial power supply is obtained.

  As described in Non-Patent Document 1, using such a technique, an LED bulb having an illuminance equivalent to that of an incandescent bulb with power consumption of about 60 W and a low power consumption of about 8.7 W can be obtained.

  Further, although the power consumption is reduced, it is important from the viewpoint of extending the life and safety of the LED bulb to improve the heat dissipation of the LED bulb. For this reason, Patent Document 2 describes an adapter that can enhance the heat dissipation of an LED bulb by connecting between the socket for the bulb and the LED bulb.

  An LED bulb using such a technique can be used instead of an incandescent bulb.

Shigeru Osawa, Masahiro Izumi, Shizuka Sakamoto, Toshiba Review, Vol. 65, No. 7, p. 8 (2010)

JP 2010-33863 A JP 2007-157603 A

  However, in general, in a power supply circuit provided in an LED bulb, a high frequency of MHz or higher, which is higher than 50 Hz or the like in a commercial power supply, is often used for voltage conversion. Therefore, for example, noise in the VHF band (90 MHz to 290 MHz) due to the high frequency is generated from the power supply circuit. This noise propagates through the power cable in the home to which the LED bulb is connected, and causes various electronic devices to malfunction. In addition, since the power cable also functions as an antenna that oscillates this noise, it may adversely affect devices that are not directly connected to the power cable.

  In recent years, terrestrial analog broadcasting using the VHF band has been abolished instead of using terrestrial digital broadcasting using the UHF band in television broadcasting. For this reason, in the future, it is intended that various electronic devices and communication devices such as devices for multimedia communication will be used in the VHF band which is not used in television broadcasting. It is clear that the above noise is a major obstacle in such use.

  That is, it has been difficult to reduce the influence of noise when the LED bulb is connected to a commercial power source.

  The present invention has been made in view of such problems, and an object thereof is to provide an invention that solves the above problems.

In order to solve the above problems, the present invention has the following configurations.
The LED bulb energization apparatus of the present invention supplies commercial AC power to the LED bulb, and internally includes two wirings for connecting the power supply circuit provided in the LED bulb and the commercial AC power source, An LED light bulb energizing device provided with two noise filters formed by winding a part of the wiring around a toroidal ferrite core in the path of the two wirings, the two noises In one noise filter of the filters, one of the two wirings winds the ferrite core, and the other of the two wirings winds the ferrite core. The two wires are wound around the ferrite core so that the rotation direction is the same as each other. In the other noise filter of the two noise filters, The direction in which one of the wires is wound around the ferrite core and the direction in which the other of the two wires is wound around the ferrite core are opposite to each other. The two wires are wound around the ferrite core.
The LED bulb energizing device of the present invention is characterized in that it has a configuration in which the two noise filters are laminated with the toroidal center axis in common.
In the LED light bulb energizing apparatus according to the present invention, the noise filter is characterized in that a high frequency of a frequency component in a frequency range of 90 MHz to 290 MHz is reduced.
The LED bulb energizing device of the present invention is used by being inserted between a bulb socket installed in a house to which the commercial AC power supply is connected and the LED bulb, one end being the LED bulb and the other end being The LED light bulb adapter includes a configuration in which the commercial AC power supply and the power supply circuit in the LED light bulb are connected by the wiring by being connected to the light bulb socket, respectively.
In the LED bulb energizing device of the present invention, the one end and the LED bulb, and the other end and the bulb socket are connected by screwing, respectively.
The LED light bulb energizing apparatus of the present invention is a light bulb socket that is installed in a house and includes the wiring to which the commercial AC power supply is connected.

  Since this invention is comprised as mentioned above, the influence of the noise at the time of connecting and using an LED light bulb for commercial power can be reduced.

It is a block diagram which shows the aspect of use of the adapter for LED bulbs concerning embodiment of this invention. It is a figure which shows the structure of a general LED light bulb and the socket for light bulbs. It is a figure which shows the structure of the adapter for LED bulbs concerning embodiment of this invention. It is a figure which shows the structure of the noise filter using a ferrite core. It is a figure which shows the arrangement configuration of the noise filter in the adapter for LED bulbs concerning embodiment of this invention. It is a figure which shows the structure and usage aspect of the socket for light bulbs concerning embodiment of this invention. It is the result of having actually measured the noise reduction effect in the adapter for LED bulbs concerning an embodiment of the invention.

  Hereinafter, an LED bulb energizing device according to an embodiment of the present invention will be described. This LED light bulb energizing device is used for supplying commercial AC power to LED light bulbs (light bulbs in which LED elements are used as light sources and can replace incandescent light bulbs). As this LED light bulb energizing device, for example, a light bulb socket that is installed in a house and connected to a commercial AC power source and connected to the LED light bulb, or inserted between the light bulb socket and the LED light bulb. There are two types of LED bulb adapters that are used. Here, first, an LED bulb adapter used by being inserted between a bulb socket and an LED bulb will be described. This LED bulb adapter is installed by being inserted between a bulb socket connected to a commercial AC power supply (AC 100 V) and the LED bulb. Fig.1 (a) (b) is a figure which shows the aspect at the time of use of this adapter for LED bulbs. 2A shows the configuration of the LED bulb 100, and FIG. 2B shows the configuration of the socket 90 for the bulb. FIG. 3 shows the configuration of the LED bulb adapter 10 according to the embodiment of the present invention.

  As shown in FIG. 1A, the LED bulb adapter 10 is used by being inserted between an LED bulb 100 and a bulb socket 90. The light bulb socket 90 is embedded, for example, in the ceiling 200 of the house, and is connected to a commercial AC 100V power cable 300. The LED bulb adapter 10 and the LED bulb 100 are connected to the bulb socket 90 so that the LED bulb 100 can emit light. In the conventional method of using the LED bulb 10 without using the LED bulb adapter 10, the LED bulb 10 is directly connected to the bulb socket 90.

  As shown in FIG. 2A, in the LED bulb 100, a screw-shaped base 101 and a central electrode 102 insulated from the base are integrated with a substantially spherical light emitting unit 103, respectively. . When the base 101 and the center electrode 102 are electrically connected to the two power cables 300 of the commercial power supply, power is supplied to the light emitting elements (LED elements) in the light emitting unit 103 to emit light.

  On the other hand, as shown in FIG. 2B, the bulb socket 90 is provided with a substantially cylindrical socket recess 91 to which the LED bulb 100 can be joined. Is provided with a metal socket screw portion 92 that is screwed into the base 101 when the LED bulb 100 is joined. Further, a socket center electrode 93 that contacts the center electrode 102 of the LED bulb 100 when the socket screw portion 92 and the base 101 are screwed is provided on the bottom surface of the socket recess 91 (the upper surface in FIG. 2B). Yes. The socket screw portion 92 and the socket center electrode 93 are connected to different power cables 300 in FIG.

  The configurations of the base 101 in the LED bulb 100, the center electrode 102, the socket screw portion 92 in the bulb socket 90, and the socket center electrode 93 are standardized as Edison-based sockets, for example, as defined in JISC7709-0. . This configuration is not limited to the LED bulb 100, but is the same in the case of an incandescent bulb. For this reason, it is easy to replace the incandescent bulb with the LED bulb 100.

  As shown in FIG. 1, the LED bulb adapter 10 is inserted between the LED bulb 100 and the bulb socket 90. Therefore, as shown in FIG. 3, in the LED bulb adapter 10, a configuration similar to the socket recess 91 in the bulb socket 90 is formed on one end (lower end in FIG. 3) side. ing. That is, an adapter recess 11 to which the LED bulb 100 is joined is provided, and a metal adapter screw portion 12 that is screwed to the base 101 of the LED bulb 100 when joined to the LED bulb 100 is provided on the inner side surface of the adapter recess 11. Is provided. Moreover, the adapter recessed part center electrode 13 which contact | connects the center electrode 102 of the LED light bulb 100 at the time of this screwing is provided in the bottom face (upper surface in FIG. 3) of the adapter recessed part 11. As shown in FIG. With this configuration, the base 101 of the LED bulb 100 and the adapter screw portion 12 in the adapter recess 11 can be screwed together at one end side of the LED bulb adapter 10. Thereby, the LED bulb 100 can be joined to the adapter recess 11 in the LED bulb adapter 10.

  Further, on the other end (upper end in FIG. 3) side of the LED bulb adapter 10, a metal adapter base 14 similar to the base 101 in the LED bulb 100 and an adapter center similar to the center electrode 102 in the LED bulb 100 are provided. Electrodes 15 are provided respectively. With this configuration, the LED bulb adapter 10 can be connected to the bulb socket 90 in the same manner as when the LED bulb 100 is connected to the bulb socket 90. That is, the adapter cap 14 of the LED bulb adapter 10 can be screwed into the socket screw portion 92 of the bulb socket 90 in the socket recess 91 of the bulb socket 90. Thereby, this adapter 10 for LED bulbs can be joined to the socket recess 91 of the socket 90 for bulbs.

  The LED bulb adapter 10 has a substantially cylindrical shape corresponding to the adapter recess 11 and the screw-shaped adapter base 14.

  Inside the LED bulb adapter 10, the adapter screw portion 12 and the adapter recess center electrode 13 are connected to the adapter base 14 and the adapter center electrode 15, respectively, by wiring. However, the connected combination may be reversed. With this configuration, the base 101 and the center electrode 102 used to supply power in the LED bulb 100 are electrically connected to the adapter base 14 and the adapter center electrode 15. The adapter cap 14 and the adapter center electrode 15 are electrically connected to the socket screw portion 92 and the socket center electrode 93, respectively. For this reason, a power supply (commercial AC power supply) can be connected from the light bulb socket 90 to the LED light bulb 100 via the LED light bulb adapter 10, and the LED light bulb 100 can emit light.

  Here, the configuration of the LED bulb 100 is the same as that described in, for example, Patent Documents 1 and 2 and Non-Patent Document 1. That is, in the light emitting unit 103, a large number of LED elements made of a compound semiconductor and a power supply circuit that converts AC 100V into a low DC voltage for driving the LED elements are incorporated in the glass tube. . In this power supply circuit, since a high frequency of about MHz, which is higher than that of a commercial power supply (50 Hz or the like), is used, it becomes a noise generation source having a frequency component in the VHF band. This noise propagates through, for example, the power cable 300 electrically connected to the LED bulb 100, and adversely affects the operation of various electric devices and communication devices connected to the LED bulb 100. Further, since the power cable 300 also functions as an antenna that oscillates this noise, it also adversely affects devices that are not directly connected to the power cable 300.

  For this reason, in this LED bulb adapter 10, the high frequency generated by the LED bulb 100 in the path of the wiring connecting the adapter screw portion 12, the adapter recess center electrode 13, and the adapter base 14 and adapter center electrode 15, respectively. A noise filter for removing the noise is provided. Thereby, propagation of this noise can be suppressed. That is, the influence of noise emitted by the LED bulb 100 can be suppressed.

  A specific configuration of the noise filter used here will be described below. As the noise filter, for example, a low-pass filter that removes a frequency sufficiently higher than 50 Hz (VHF band) can be used as appropriate. A noise filter using a ferrite core as described below can be suitably used.

  The configuration of a noise filter using a ferrite core is described in, for example, Japanese Patent Application Laid-Open No. 2002-343620. In this noise filter, wiring is wound around a toroidal ferrite core made of a material (ferrite) made of a material having high magnetic permeability, and high frequency noise can be removed by its inductance component.

  Here, in this LED bulb adapter 10, two wirings respectively corresponding to the two power cables 300 are used. The relationship between the two wires and the ferrite core can be set to two types of settings shown in FIGS. In FIG. 4, the configuration of (a) is the noise filter 41, and the configuration of (b) is the noise filter 42. FIGS. 4A and 4B are top views showing a simplified configuration of the noise filter 41 and the noise filter 42 as viewed from the direction along the center axis of the toroidal shape.

  In either case, one wiring 61 is wound around the upper half of the top view of the toroidal ferrite core 50, and the other wiring 62 is wound around the lower half. Here, the winding direction of the wiring 61 in (a) and the winding direction in (b) are the same (clockwise), but the winding direction of the wiring 62 is reversed between (a) and (b). (A: clockwise, b: counterclockwise). That is, in the noise filter 41, the direction in which the wiring 61 and the wiring 62 wind the ferrite core 50 is the same, whereas in the noise filter 42, the direction in which the wiring 61 and the wiring 62 wind the ferrite core 50 is reversed. It is facing. FIG. 4 is a diagram showing the actual configuration in a simplified manner, and the number of turns of each wiring is actually larger than this, and is appropriately set according to the set inductance.

  In the noise filter 41 set in FIG. 4A, as indicated by the black arrows shown in the wirings 61 and 62, a driving current for driving the LED bulb 100 from the terminal A1 side to the terminal B1 side via the wiring 61. , And this current flows from the terminal B1 to the LED bulb 100 side. This current returns from the LED bulb 100 to the terminal B 2 and returns to the terminal A 1 side via the wiring 62. As noise generated by the LED bulb 100, there is noise (normal mode noise) that flows in the same direction as the drive current. When this current flows in the configuration of FIG. 4A, a magnetic field is generated in the ferrite core 50 in the direction indicated by the broken line arrow in FIG. That is, the direction of the magnetic field generated in the upper half of the ferrite core 50 by the wiring 61 is equal to the direction of the magnetic field generated in the lower half of the ferrite core 50 by the wiring 62. For this reason, the inductance in this case increases, and the filter effect for high frequencies obtained by this inductance increases. That is, the noise filter 41 functions as a filter for normal mode noise. Since the drive current has a sufficiently lower frequency (50 Hz, etc.) than the VHF band, the influence of this configuration on the drive current can be ignored.

  On the other hand, as noise generated by the LED bulb 100, there is noise (common mode noise) flowing in the same direction in parallel with the wirings 61 and 62 in addition to the normal mode noise. This common mode noise propagates by flowing in the wirings 61 and 62 in the same direction (black arrow in the figure) and finally flowing toward the ground potential. In the noise filter 42 having the configuration shown in FIG. 4B, when the common mode noise exists, the direction of the magnetic field generated in the ferrite core 50 by the wiring 61 is equal to the direction of the magnetic field generated in the ferrite core 50 by the wiring 62. . That is, the inductance with respect to common mode noise can be increased. For this reason, the noise filter 42 functions as a filter for common mode noise.

  The filters 41 and 42 having the configuration shown in FIG. 4 are particularly preferably used in the LED bulb adapter 10. The left side of FIG. 5 is a diagram showing the configuration at this time. In the substantially cylindrical LED bulb adapter 10, the toroidal noise filters 41 and 42 have a common central axis of the ferrite core 50 and a central axis of the substantially cylindrical LED bulb adapter 10. It can be easily mounted by laminating on. Further, the right side of FIG. 5 is a diagram showing wiring connections in this case. Here, the noise filter 41 and the noise filter 42 are connected in series. The terminals C1 and C2 are connected to the adapter base 14 and the adapter center electrode 15 so as to be connected to the power cable 300 in use. Further, the terminals D1 and D2 are connected to the LED bulb 100 side in use by being connected to the adapter screw portion 12 and the adapter recess center electrode 13.

  Using the LED bulb adapter 10, both normal mode noise and common mode noise caused by the LED bulb 100 can be removed. Thereby, the influence of the noise at the time of connecting and using the LED bulb 100 for commercial AC power supply can be reduced. Furthermore, since the noise filters 41 and 42 have a simple configuration, the noise filters 41 and 42 are low in cost and are less likely to be mechanically damaged.

  A configuration in which only one of the noise filters 41 and 42 may be used depending on whether the noise in particular is in the normal mode or the common mode. Alternatively, a plurality of these may be connected in series and stacked. This configuration can be appropriately set depending on the characteristics of the LED bulb 100 used. In any case, it is easy to incorporate a plurality of toroidal noise filters in a substantially cylindrical shape in the LED bulb adapter 10 so as to have a common central axis.

  Moreover, the characteristics (spectrum etc.) of the high frequency noise which LED bulb 100 emits are decided mainly by the specification of the power supply circuit used, for example, differ greatly with manufacturers. On the other hand, according to the LED bulb adapter 10 configured as described above, high-frequency noise can be suppressed regardless of the type of the LED bulb 100.

  Instead of using the LED bulb adapter 10 (or noise filter) described above, it is also possible to reduce noise by providing a similar noise filter inside the LED bulb. However, in this case, it is inevitable that the LED bulb is expensive. Although the life of LED bulbs can be made longer than that of incandescent bulbs, the life of LED bulbs is determined by the life of LED elements and the life of power supply circuits, and it is difficult to use LED bulbs semipermanently. is there. In addition, the LED bulb may be mechanically damaged. In such a case, when a similar noise filter is mounted inside the LED bulb, it is necessary to replace the LED bulb including the noise filter as it is.

  On the other hand, the LED bulb adapter 10 and the noise filter inside thereof can be used semipermanently. Further, when used in the configuration of FIG. 1, the possibility that the LED bulb adapter 10 is mechanically damaged is lower than that of the LED bulb 100 at least. For this reason, by using said LED bulb adapter 10, the influence of the noise which LED bulb 100 emits can be suppressed at low cost. In particular, the overall configuration using the LED bulb 100 and the bulb socket 90 as shown in FIG. 1 can be reduced in cost.

  In the above example, the LED bulb adapter is described as the LED bulb energization device according to the embodiment of the present invention. However, a similar configuration can be provided in the bulb socket. In this case, a light bulb socket 190 in which the noise filters 41 and 42 as shown in FIG. 6 are incorporated in the same manner as the LED light bulb adapter 10 in FIG. 5 is configured. When this light bulb socket 190 is used, the LED light bulb adapter is unnecessary, and the LED light bulb 100 can be directly connected to the light bulb socket 190 for use.

  In this case, it is necessary to replace the light bulb socket, which has been used for the incandescent light bulb, with this light bulb socket 190. However, after the replacement, the bulb socket 190 can be used semi-permanently. Even if a conventional incandescent bulb is used instead of the LED bulb 100, the noise filters 41, 42, etc. do not adversely affect the driving current of the incandescent bulb. Can do.

(Example)
Actually, the above-mentioned LED bulb adapter was manufactured, and noise was measured when the adapter was inserted between the LED bulb and the bulb socket and when the bulb socket and the LED bulb were directly connected. Here, as an LED light bulb, a power filter made in Japan having a power consumption of 8.7 W (an incandescent light bulb equivalent to 60 W) and a noise filter built in the adapter for the LED light bulb have the structure shown in FIG. (Series of noise filters 41 and 42) was used. Noise measurement was performed according to the CISPR standard, which is an international standard for noise measurement.

  FIG. 7 shows the actual measurement data. It has been confirmed that noise in the VHF band (90 MHz to 290 MHz), which is a problem in particular, can be reduced by using the LED bulb adapter.

  In the above example, the case where the noise filter using the toroidal ferrite core is provided inside the LED bulb energizing device has been described. However, other forms of noise filters may be provided in the same manner. Any noise filter that can be used as an independent inductor and can be accommodated in an LED bulb adapter or bulb socket can be used in the same manner.

  In the above example, the LED bulb, the socket for the bulb, and the adapter for the LED bulb are compliant with Edison base, that is, one end of the LED bulb adapter and the LED bulb, the other end of the LED bulb adapter and the socket for the bulb. These are connected by screwing. However, it is obvious that the same effect can be obtained even when these connections are in different forms.

10 LED bulb adapter (LED bulb energization device)
DESCRIPTION OF SYMBOLS 11 Adapter recessed part 12 Adapter screw part 13 Adapter recessed part center electrode 14 Adapter cap 15 Adapter center electrode 41, 42 Noise filter 50 Ferrite core 61, 62 Wiring 90 Light bulb socket 91 Socket recessed part 92 Socket screw part 93 Socket center electrode 100 LED light bulb 101 Base 102 Central electrode 103 Light-emitting part 190 Light bulb socket (LED light bulb energizing device)
200 Ceiling 300 Power cable

Claims (6)

A commercial AC power supply is supplied to the LED bulb, and two wirings for connecting the power supply circuit provided in the LED bulb and the commercial AC power supply are provided inside, and in the path of the two wirings, An LED bulb energization device provided with two noise filters configured by winding a part of the wiring around a toroidal ferrite core,
In one noise filter of the two noise filters, a direction in which one of the two wires winds the ferrite core and a wire in the other of the two wires Two wires are wound around the ferrite core so that the direction in which the ferrite core is wound is in the same direction as each other,
In the other noise filter of the two noise filters, the direction in which one of the two wirings winds the ferrite core and the other of the two wirings The two wires are wound around the ferrite core so that the direction in which the ferrite core is wound is opposite to each other.
A device for energizing an LED bulb. LED bulb energizing device according to claim 1, characterized in that it comprises a configuration in which the toroidal two of said noise filter and a common central axis of stacked therein. The device for energizing an LED bulb according to claim 1 or 2 , wherein the noise filter reduces a high frequency of a frequency component in a frequency range of 90 MHz to 290 MHz. The commercial AC power supply is connected and used between a light bulb socket installed in a house and the LED light bulb, and one end is connected to the LED light bulb and the other end is connected to the light bulb socket. by any of the preceding claims, characterized in that between the power supply circuit in the LED bulb and the commercial AC power source is an LED light bulb adapter having a structure to be connected by the wiring to claim 3 Item 1. An LED bulb energizing device according to item 1. 5. The LED bulb energization device according to claim 4 , wherein the one end and the LED bulb, and the other end and the bulb socket are connected by screwing. The LED light bulb energization according to any one of claims 1 to 3 , wherein the light bulb socket is installed in a house and includes the wiring to which the commercial AC power supply is connected. machine.

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