JP3196569U - Mini krypton lamp type LED bulb - Google Patents

Abstract

A mini-krypton lamp type LED bulb with low noise is provided. A mini-krypton lamp type LED bulb includes a lighting circuit 55 inside an LED unit and a base connection portion. The lighting circuit includes a diode bridge 35A, a first capacitor 35B connected in parallel with the LED 11A between the diode bridge 35A and the LED 11A, and a second capacitor 35D connected in series between the diode bridge 35A and the power supply 40. And a third capacitor 55G connected in parallel with the diode bridge between the diode bridge and the power source. [Selection] Figure 12

Description

  The present invention relates to a mini-krypton lamp type LED bulb using an LED as a light source.

  2. Description of the Related Art In recent years, with the improvement of LED luminous efficiency, a bulb-type LED bulb using an LED as a light source is known as an alternative to incandescent bulbs and bulb-type fluorescent lamps. As such an LED bulb, for example, a configuration is known in which a planar base having LEDs is disposed, and a lighting circuit for LED lighting is housed in an outer portion via an insulating member (for example, , See Patent Document 1).

  Moreover, it is known that as the temperature rises, the light output decreases and the life of the LED decreases. Therefore, it is required to suppress the heat generation. As a means for solving the problem, for example, a method of dissipating the heat generated by the LED to the peripheral portion by heat conduction using an outer member as a metal material is common.

JP 2006-313717 A (pages 5 to 6, FIG. 2)

  However, in the case of the LED described in Patent Document 1, since the planar substrate on which the LED is mounted is mounted perpendicular to the base, the front side illumination on the mounting surface can be sufficiently secured. There was a problem that the illuminance at 180 degrees on the side was poor. Therefore, when illuminating light emitted from the entire bulb in the downward direction by the reflector of the fixture, such as a downlight lighting fixture, when the LED bulb is attached at an angle perpendicular to the ceiling, the illuminance is secured However, in other cases, the conventional illumination range and high luminous flux could not be secured.

  Further, in the case of the LED bulb described in Patent Document 1, since the light source base on which the LED is mounted and the lighting circuit board for lighting the LED are separately provided, each space is required, and Since a heat dissipation countermeasure structure for the LED is required, there is a problem that miniaturization cannot be easily performed.

  Furthermore, in the case of an LED bulb having an LED heat dissipation countermeasure structure in the outer part, an environment where the ambient temperature can be 36 ° C. or higher even if the LED bulb itself does not generate heat, such as a heat-insulating construction lighting fixture SB type, SGI When used for so-called downlight lighting fixtures such as the shape and the SG type, there is a problem that the heat of the surroundings is transmitted to the LED through the outer portion, and the performance and life of the LED are reduced. Therefore, the conventional LED bulb has many usage conditions and lacks versatility.

  This invention is made | formed based on such a problem, and it aims at providing the mini krypton lamp type | mold LED bulb suitable for a downlight lighting fixture.

  The mini-krypton lamp type LED bulb of the present invention has an LED unit in which a ceiling substrate on which a plurality of LEDs are mounted is disposed at one end of a side substrate on which a plurality of LEDs are mounted. At the other end, a base is arranged via a base connection part, and a lighting circuit is provided inside the LED unit and the base connection part, and the lighting circuit is between the diode bridge and the diode bridge and the LED. A first capacitor connected in parallel with the LED; a second capacitor connected in series between the diode bridge and the power supply; and a third capacitor connected in parallel with the diode bridge between the diode bridge and the power supply. It is equipped with.

  According to the mini-krypton lamp type LED bulb of the present invention, the LED unit has a ceiling substrate on which a plurality of LEDs are mounted at one end of a side substrate on which a plurality of LEDs are mounted. The light distribution in the direction of the base can be expanded by 80 degrees or more. Therefore, there are no usage conditions such as the angle of attachment to the downlight lighting fixture, and it can be widely used for downlight lighting fixtures.

  In addition, since the lighting circuit is provided inside the LED unit and the base connection part, the LED unit and the base connection part can be reduced in size and can be more suitable for downlight lighting fixtures.

  Further, the lighting circuit includes a diode bridge, a first capacitor connected in parallel with the LED between the diode bridge and the LED, a second capacitor connected in series between the diode bridge and the power source, and the diode bridge. Since the third capacitor connected in parallel with the diode bridge is provided between the power supply and the power supply, noise can be reduced.

It is a perspective view showing the structure of the mini krypton lamp type | mold LED bulb which concerns on the 1st Embodiment of this invention. It is the perspective view which attached the cover to the mini-krypton lamp type LED bulb shown in FIG. It is sectional drawing showing the internal structure of the mini krypton lamp type | mold LED bulb shown in FIG. It is a figure explaining the state which attached the mini krypton lamp type | mold LED light bulb shown in FIG. 1 to the downlight lighting fixture. It is a figure which shows the attachment angle which attaches the mini-krypton lamp type | mold LED bulb shown in FIG. 1 to a downlight lighting fixture. It is a figure showing the structure of the LED light bulb described in patent document 1. It is a figure explaining the example which cannot attach the LED light bulb of patent document 1 to a downlight lighting fixture. It is a figure explaining the example which was able to attach the LED light bulb of patent document 1 to the downlight lighting fixture. It is a figure showing the structure of the lighting circuit of the mini krypton lamp type LED light bulb which concerns on the 2nd Embodiment of this invention. It is a figure showing the result of having measured noise about the mini krypton lamp type LED bulb concerning a 2nd embodiment of the present invention. It is a figure showing the result of having measured noise about a commercial LED bulb. It is a figure showing the structure of the lighting circuit of the mini krypton lamp type | mold LED bulb which concerns on the 3rd Embodiment of this invention. It is a figure showing the result of having measured noise about the mini krypton lamp type LED bulb concerning a 3rd embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(First embodiment)
1 and 2 show an external configuration of a mini-krypton lamp type LED bulb 1 according to the first embodiment, and FIG. 3 shows an internal structure of the mini-krypton lamp type LED bulb 1 shown in FIG. Is expressed.

  The mini krypton lamp type LED bulb 10 can be used for a downlight lighting fixture that is embedded in a ceiling, for example. The mini krypton lamp type LED bulb 10 is, for example, an LED in which a plurality of rectangular side substrates 11B mounted with LEDs 11A are arranged in a polygonal column shape, and a ceiling substrate 11C mounted with LEDs 11A is disposed at one end thereof. A unit 11 is included.

  Although FIG. 1 shows the case where the five side bases 11B are arranged in a pentagonal prism shape, six or more side bases 11B may be provided, and four or less side bases 11B may be provided. May be arranged. Further, FIG. 1 shows a case where three LEDs are mounted on one side base 11B and one ceiling base 11C, respectively, but one or two, or four or more may be used. Furthermore, it is also possible to use EL (electric luminescence) instead of the LED 11A as the light source.

  A base 14 is disposed at the other end of the LED unit 11 via, for example, a bottom base 12 and a base connection part 13. For example, a screw-in type called E17 is usually used as the base 14, but it is not limited to this as long as it can be attached to a socket to which a general lighting bulb is attached.

  The inside of the LED unit 11 and the base connection portion 13 is hollow, and for example, a lighting circuit 15 is disposed therein, and power is supplied from a power source via the base 14. The lighting circuit 15 includes, for example, a circuit component 15A, a diode bridge 15B, a capacitor 15C, and a current limiting element 15D. The commercial AC power supplied from the base 14 lights the LED 11A with a constant voltage and a constant current rectified and smoothed by the diode bridge 15B, the capacitor 15C, and the current limiting element 15D mounted on the lighting circuit 14.

  The current limiting element 15D is constituted by, for example, a resistance element or a constant current diode, and limits a current value supplied to the LED 11A. The lighting circuit 15 using the current limiting element 15D is configured to supply power to the LED 11A with a current value that suppresses self-heating.

  The outside of the LED unit 11 is covered with a translucent cover 16, for example. The translucent cover 16 is disposed, for example, by inserting one end portion into the concave portion 13 </ b> A of the base connection portion 13. The translucent cover 16 and the base connection part 13 are preferably made of polycarbonate, for example. Because it is hard to transfer heat compared to metal materials, it is difficult for outside heat to be transferred to the LED 11A, and it is possible to suppress an increase in the temperature near the LED 11A, and it has both translucency and flame retardancy. is there. If there is a material satisfying these conditions or more, it is also possible to use it.

  The dimensions of the mini-krypton lamp type LED bulb 10 correspond to, for example, the dimension standard of the mini-krypton lamp, and the longitudinal dimension is preferably 67 mm or less and the width dimension is 35 mm or less. As a result, it can be mounted as it is on the downlight lighting fixture to which the mini-krypton lamp is mounted.

  FIG. 4 shows a state in which the mini-krypton lamp type LED bulb 10 is attached to the downlight luminaire 20. The mini krypton lamp type LED bulb 10 is used by attaching a base 14 to a socket 22 of a downlight lighting fixture 20 which is embedded in a ceiling 21 and attached. The mini krypton lamp type LED bulb 10 is preferably configured such that the center of the light source is located at the center of the downlight luminaire 209, and the light emitted from the mini krypton lamp type LED bulb 10 in multiple directions is a reflector. By reflecting at 23, as indicated by the arrow, it is irradiated in the downward direction, and a high luminous flux can be obtained in the irradiation range 24.

  FIG. 5 illustrates the mounting angle of the mini-krypton lamp type LED bulb 10. The mini-krypton lamp type LED bulb 10 is preferably used for the downlight lighting device 20 in which the attachment angle of the base 14, that is, the attachment angle of the socket 22, is in the range of 30 degrees or more and 90 degrees or less with respect to the vertical direction. . As described with reference to FIG. 4, the mini-krypton lamp type LED bulb 10 can irradiate light in multiple directions, so even if it is attached obliquely at an angle with respect to the vertical direction, This is because a high luminous flux can be obtained in the direction. In addition, it is preferable that the attachment angle of the base 14 is not vertical but has an angle with respect to the vertical direction, because the height of the downlight lighting device 20 can be reduced.

  FIG. 6 illustrates a configuration of the LED bulb 110 described in Patent Document 1. In this LED bulb 110, a plurality of LEDs 111 are mounted on a flat substrate, and light is irradiated through the translucent cover 112 to the front side of the mounting surface of the LEDs 111 as indicated by arrows. Therefore, the illuminance on the front side is sufficiently ensured, but there is almost no illuminance on the base side. In addition, since the base 114 provided between the LED 111 and the base 113 has a heat dissipation structure, the base 114 needs to have a length in order to increase the heat dissipation efficiency, and it is difficult to reduce the size.

  FIG. 7 shows a case where the LED light bulb 110 described in Patent Document 1 is attached to the downlight lighting device 20. Thus, since the LED bulb 110 described in Patent Document 1 is large in size, even if the base 113 and the socket 22 of the downlight lighting fixture 20 are the same size, the LED bulb 110 is not connected to the downlight lighting fixture 20. I can't wear it.

  FIG. 8 shows an irradiation range in a case where the LED bulb 110 described in Patent Document 1 can be attached to the downlight luminaire 20. Thus, in the LED bulb 110 described in Patent Document 1, even if it can be mounted on the downlight luminaire 20, the planar substrate on which the LED 111 is mounted is disposed perpendicular to the base 113, The irradiation direction of light is limited, and the irradiation range 22 is greatly different from the mini-krypton lamp type LED bulb 10 according to the present embodiment (see FIG. 4), and a high luminous flux cannot be secured. Therefore, it is difficult to use for the downlight lighting fixture 20.

  As described above, according to the present embodiment, the LED unit 11 having the ceiling substrate 11C on which the LED 11A is mounted is provided at one end of the side substrate 11B on which the LED 11A is mounted. The light distribution to can be expanded by 80 degrees or more. Therefore, there is no use condition such as an angle of attachment to the downlight lighting fixture 20, and it can be widely used for downlight lighting fixtures. In particular, a high effect can be obtained for the downlight lighting fixture 20 in which the attachment angle of the base 14 is in the range of 30 degrees or more and 90 degrees or less with respect to the vertical direction.

  Moreover, if the lighting circuit 15 is provided inside the LED unit 11 and the base connection part 13, it can be reduced in size and can be made more suitable for a downlight lighting fixture.

  Furthermore, if a current limiting element 15D is used for the lighting circuit 15 and power is supplied at a current value that suppresses the self-heating of the LED 11A, a heat dissipating part is not required, and even if it is used for the downlight lighting fixture 20, the temperature rises. It is possible to suppress the deterioration of characteristics.

(Second Embodiment)
The mini-krypton lamp type LED bulb 30 according to the second embodiment has the same configuration as that of the first embodiment except that the configuration of the lighting circuit 35 is different. Therefore, the same parts are denoted by the same reference numerals and description thereof is omitted.

  FIG. 9 shows the configuration of the lighting circuit 35. The lighting circuit 35 is connected in parallel with, for example, a diode bridge 35A which is a rectifier circuit, a first capacitor 35B as a smoothing circuit connected in parallel with the LED 11A between the diode bridge 35A and the LED 11A, and a first capacitor 35B. The first resistor 35C is provided. Thereby, in the lighting circuit 35, the AC voltage can be changed to a DC voltage by the diode bridge 35A, and the DC voltage can be smoothed by the first capacitor 35B to reduce noise.

  The lighting circuit 35 includes, for example, a second capacitor 35D and a second resistor 35E connected in series between the diode bridge 35A and the power supply 40. A plurality of second capacitors 35D may be provided, and the second capacitors 35D are connected in parallel to each other. Noise can be reduced by the second capacitor 35D. The second resistor 35E is for suppressing inrush current. It is preferable that the lighting circuit 35 further includes a power fuse 35F.

  It is preferable to configure the lighting circuit 35 using electronic components with less noise in this way because noise can be reduced. FIG. 10 shows a result of measuring noise (noise terminal voltage) of the mini-krypton lamp type LED bulb 30 according to the present embodiment. Moreover, the result of having measured the noise (noise terminal voltage) of the other LED light bulb marketed in FIG. 11 is shown. In addition, in FIG.10 and FIG.11, the result measured twice is each shown. Comparing FIG. 10 with FIG. 11, it can be seen that according to the present embodiment, the noise can be greatly reduced.

  As described above, according to the present embodiment, the lighting circuit 35 includes the diode bridge 35A, the first capacitor 35B connected in parallel with the LED 11A between the diode bridge 35A and the LED 11A, and the diode bridge and the power source. Since the second capacitor 35D connected directly to the second capacitor 35D is provided, noise can be reduced.

(Third embodiment)
FIG. 12 shows the configuration of the lighting circuit 55 of the mini-krypton lamp type LED bulb 50 according to the third embodiment. FIG. 12A shows one configuration example, and FIG. 12B shows another configuration example. ing. The mini-krypton lamp type LED bulb 50 according to the third embodiment is the same as the second embodiment except that a third capacitor 55G is added to the lighting circuit 35 of the second embodiment. It has a configuration. Therefore, the same parts are denoted by the same reference numerals and description thereof is omitted.

  The lighting circuit 55 includes a third capacitor 55G connected in parallel with the diode bridge 35A between the diode bridge 35A and the power supply 40. This is because noise can be reduced. For example, as shown in FIG. 12A, the third capacitor 55G may be connected between the diode bridge 35A and the second capacitor 35D. As shown in FIG. You may connect between the capacitor | condenser 35D and the power supply 40. FIG. A plurality of third capacitors 55G may be provided, for example, at both the position shown in FIG. 12A and the position shown in FIG. 12B.

  FIG. 13 shows the result of measuring the noise (noise terminal voltage) of the mini-krypton lamp type LED bulb 50 according to the present embodiment. In FIG. 13, the results of two measurements are shown individually. Compared to the noise measurement results of the mini-krypton lamp type LED bulb 30 of the second embodiment shown in FIG. 10 and the noise measurement results of other commercially available LED bulbs shown in FIG. According to the embodiment, it can be seen that noise can be further reduced.

  Thus, according to the present embodiment, in addition to the diode bridge 35A, the first capacitor 35B, and the second capacitor 35D, the lighting circuit 55 is connected in parallel with the diode bridge 35A between the diode bridge 35A and the power supply 40. Since the third capacitor 55G connected to is provided, noise can be further reduced.

  The present invention has been described with reference to the embodiment. However, the present invention is not limited to the above embodiment, and various modifications can be made. For example, in the above-described embodiment, the case where the side surface base 11B is configured in a polygonal column shape has been described, but it may be a truncated pyramid shape, a cylindrical shape, or a truncated cone shape.

  It can be preferably used as a light bulb for a downlight luminaire.

  DESCRIPTION OF SYMBOLS 10, 30, 50 ... Mini krypton lamp type LED bulb, 11 ... LED unit, 11A ... LED, 11B ... Side board, 11C ... Ceiling board, 12 ... Bottom board, 13 ... Base connection part, 13A ... Recess, 14 ... Base 15, 35, 55 ... lighting circuit, 15A ... circuit components, 15B ... diode bridge, 15C ... capacitor, 15D ... current limiting element, 16 ... translucent cover, 20 ... downlight luminaire, 21 ... ceiling, 22 ... Socket, 23 ... reflector, 24 ... irradiation range, 35A ... diode bridge, 35B ... first capacitor, 35C ... second resistor, 35D ... second capacitor, 35E ... second resistor, 35F ... power fuse, 40 ... power supply, 55G ... 3rd capacitor

Claims (1)

It has an LED unit in which a ceiling substrate on which LEDs are mounted is disposed on one end of a side substrate on which LEDs are mounted,
At the other end of this LED unit, a base is disposed via a base connection part,
A lighting circuit is provided inside the LED unit and the base connection part,
The lighting circuit includes a diode bridge, a first capacitor connected in parallel with the LED between the diode bridge and the LED, and a second capacitor connected in series between the diode bridge and a power source. And a third capacitor connected in parallel with the diode bridge between the diode bridge and a power source.