JP5877575B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting apparatus that uses a light emitting element such as an LED as a light source and includes a sensor such as a human sensor.

  2. Description of the Related Art Conventionally, for example, there is a lighting apparatus that uses a fluorescent lamp as a light source and includes a human sensor. This luminaire turns on a fluorescent lamp when a person is detected by a human sensor, turns off a lamp when no person is detected, and automatically turns on and off to reduce power consumption. Is. And in such a lighting fixture, the human sensor is generally provided with a special installation space on one end side in the longitudinal direction of the fixture body (for example, Patent Document 1). reference).

  The reason why the human sensor is arranged on the end side of the instrument main body is mainly as follows. First, when the human sensor is installed in the central part of the instrument body, the human sensor approaches the power supply line, and thus is easily affected by noise radiated through the power supply line. In particular, when the light source is lit at a high frequency, the influence becomes large.

Second, since the human sensor is easily affected by light (electromagnetic waves) emitted from the light source, it becomes noise and affects the operation of the human sensor. This will be described with reference to FIG. FIG. 6 is a graph showing an emission spectrum of a fluorescent lamp as an example. The horizontal axis indicates the wavelength (nm), and the vertical axis indicates the spectral power (%). The emission spectrum of the fluorescent lamp is a combination of the mercury emission line and the emission spectrum of the phosphor, and has many peak wavelengths such as a wavelength of about 440 nm and a wavelength of 460 nm. Therefore, there is a high possibility that the light emitted from these fluorescent lamps will affect the human sensor as noise.

  As described above, if noise affects the human sensor, the human sensor malfunctions. Therefore, in order to reduce the influence of noise, the human sensor is disposed on the end side of the instrument body. .

JP 2007-35382 A

  However, in these conventional devices, there is a surface that the human sensor must be disposed on the other end side of the instrument book for the above-described reason, and therefore, a special installation space is provided on the end side. There is a need. In addition, since the human sensor is biased toward the end side, the irradiation range of the light from the light source and the detection range of the sensor do not coincide with each other, often causing a deviation. The mounting direction and position must be determined in relation to the detection range of the human sensor, and there has been a problem that the layout design of the lighting fixture is not easy.

  The present invention has been made in view of the above problems, paying attention to the fact that DC power is supplied to the light source unit and the characteristics of light emitted from the light source unit, and the sensor is disposed in the center of the light source unit. It is an object of the present invention to provide a lighting fixture that can suppress the malfunction of the light source, reduce the deviation between the light irradiation range from the light source unit and the detection range of the sensor, and facilitate the layout design of the lighting fixture.

The lighting fixture according to claim 1 includes a housing having a flange formed at an opening edge; a light source unit that is housed in the housing and includes a substrate and a plurality of light emitting elements mounted on the substrate; A light-transmitting cover that covers the light source part and has diffusibility, and has a circular window hole formed in the central part; and is disposed in the central part of the light source part and protrudes from the light-transmitting cover. A sensor disposed so that the outer peripheral surface is in contact with the inner peripheral side of the window hole, exposed to the outside, and arranged such that the top does not protrude beyond the flange ; and supplies power to the light source unit And a DC power supply unit.

  The substrate can be formed of, for example, a metal such as aluminum or a synthetic resin such as glass epoxy resin, and the shape thereof can be formed as a quadrangle, a circle, a polygon, or the like, and the size is not particularly limited. Moreover, a light emitting element is solid light emitting elements, such as LED and organic EL. The light emitting element is preferably mounted by a chip-on-board method or a surface mounting method, but the mounting method is not particularly limited due to the nature of the present invention. Moreover, there is no restriction | limiting in particular in the mounting number of a light emitting element.

  The central part of the light source part is not uniform. This is a relative concept grasped by the arrangement form of the substrate and the light emitting elements. The sensor is disposed at the center of the light source unit, but does not need to be directly attached to the light source unit, for example. In the positional relationship, the center portion may be used. Moreover, for example, a human sensor or an illuminance sensor can be applied to the sensor, and a sensor that controls the light source unit by a detection signal is included.

  Furthermore, the DC power supply unit has a function of supplying DC power to the light source unit, but in this case, a system in which a power supply system such as a commercial power supply supplies DC power may be used.

According to the present invention, the sensor is disposed at the center of the light source unit and protrudes from the diffusible light-transmitting cover that covers the light source unit so that the outer peripheral surface abuts the inner peripheral side of the window hole. Since it is disposed so as to be exposed to the outside, light hardly leaks from the gap, the influence of heat generated in the light source unit is small, malfunction is suppressed, and highly reliable operation can be ensured. In addition, it is possible to provide a lighting fixture that can reduce the difference between the irradiation range of light from the light source unit and the detection range of the sensor and facilitate the layout design of the lighting fixture. In addition, even when the luminaire is temporarily placed on the floor or the like during installation of the luminaire, the human sensor 7 can be prevented from colliding with the floor or the like and being damaged.

It is a perspective view which shows the lighting fixture which concerns on the 1st Embodiment of this invention. It is the bottom view. FIG. It is the same block connection diagram. It is a graph which shows the emission spectrum of white LED. It is a graph which shows the emission spectrum of a fluorescent lamp. It is sectional drawing which shows the lighting fixture which concerns on the 2nd Embodiment of this invention. It is sectional drawing which shows the lighting fixture which concerns on the 3rd Embodiment of this invention. It is an expanded sectional view which shows the principal part of the lighting fixture which concerns on the 4th Embodiment of this invention. It is a bottom view (Example 1) which shows the lighting fixture which concerns on the 5th Embodiment of this invention. It is the same bottom view (Example 2).

  Hereinafter, a lighting apparatus according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 6. 1 is a perspective view showing a lighting fixture, FIG. 2 is a bottom view showing the lighting fixture, FIG. 3 is a cross-sectional view taken along line YY in FIG. 2, and FIG. It is a block connection diagram.

The figure shows a ceiling-embedded lighting fixture, and the fixture body 1 has a substantially rectangular parallelepiped shape. The appliance main body 1 covers a rectangular parallelepiped housing 2 having an open surface, a light source unit 3, a heat radiating member 4, a lighting circuit 5 as a DC power supply unit, and an opening of the housing 2. And a translucent cover 6. A human sensor 7 is disposed as a sensor in the center of the light source unit 3. The casing 2 is made of sheet metal, and a flange 21 that is locked to the embedding hole of the ceiling C is formed at the opening edge. The translucent cover 6 may be white, translucent, or diffusive.

  The light source unit 3 includes a substrate 31 and LEDs 32 as a plurality of light emitting elements mounted on the substrate 31. The substrate 31 is made of a substantially rectangular flat plate of glass epoxy resin, which is an insulating material, and a wiring pattern made of copper foil is applied to the surface side. Further, a resist layer is appropriately applied. In addition, when the material of the substrate 31 is an insulating material, a ceramic material or a synthetic resin material having relatively good heat dissipation characteristics and excellent durability can be applied. Moreover, when using metal, it is preferable to apply a material having good thermal conductivity such as aluminum and excellent heat dissipation.

  The LED 32 is a surface-mount type LED package, which is schematically a LED chip disposed in a main body formed of ceramics, and a mold transparent material such as an epoxy resin or a silicone resin that seals the LED chip. It consists of a light-sensitive resin. The LED chip is a blue LED chip that emits blue light. The translucent resin for molding contains a phosphor that absorbs light emitted from the LED chip and generates yellow light, and the light emitted from the LED chip passes through the translucent resin of the LED package. It is emitted in the form of white light-emitting colors such as white and light bulb. The LED may be directly mounted on the substrate 31 by a chip-on-board method, and the mounting method is not particularly limited.

  The LEDs 32 are formed in two rows along the longitudinal direction of the substrate 31, and a total of 20 LEDs are mounted in 2 rows × 10. Note that the number of LEDs 32 mounted is not particularly limited, and the substrate 31 may be appropriately divided into, for example, two pieces for each row.

  A heat radiating member 4 is disposed on the back side of the substrate 31 so as to be in close contact with the substrate 31. The heat dissipating member 4 is made of a metal having heat conductivity such as aluminum die casting, for example, and the heat dissipating surface area is increased on the surface opposite to the joint surface to which the substrate 31 is attached. Is formed.

  Further, a lighting circuit 5 is provided on the back side of the heat radiating member 4 as a constant current DC power supply. The lighting circuit 5 supplies direct current power to the LED 32 to control the lighting of the LED 32, and components such as a rectifier, a capacitor, and a transistor as a switching element are mounted on the circuit board. Further, a lead wire (not shown) is led out from the lighting circuit 5 and is electrically connected to the substrate 31 on which the LED 32 is mounted and a commercial power source. In addition, the lighting circuit 5 is good also as a stand-alone type with the instrument main body 1. FIG.

Next, the human sensor 7 is mounted at a substantially central portion of the light source unit 3, that is, a substantially central portion of the substrate 31. The human sensor 7 is a pyroelectric infrared sensor, and includes a lens that forms a detection surface, a pyroelectric element, an IC, and the like housed inside. It is automatically turned on and off. The human sensor 7 has a substantially cylindrical mountain shape, and is arranged so that a lens as a detection surface protrudes and is exposed to the outside. That is, a circular window hole 61 is formed at the center of the translucent cover 6, and the lens of the human sensor 7 is exposed from the window hole 61. More specifically, it is arranged such that the outer peripheral surface of the lens of the human sensor 7 is in contact with the inner peripheral side of the window hole 61, and the outer periphery of the lens of the human sensor 7 The dimensions are such that no gap is generated between the surfaces. Therefore, the light emitted from the LED 32 does not leak from the gap.

  Further, the top of the lens of the human sensor 7 does not protrude downward from the flange 21 in the drawing. Therefore, it is possible to prevent the human sensor 7 from colliding with the floor surface or the like and being damaged even when the lighting device is temporarily placed on the floor surface or the like during installation of the lighting device or the like.

  As shown in FIG. 4, the control unit 10 is connected to the commercial AC power supply AC. A human sensor 7 and a lighting circuit 5 as a DC power supply unit are connected to the control unit 10, and the lighting circuit 5 is connected to the light source unit 3 and a plurality of LEDs 32. The control unit 10 has a function of turning on and off the power supply from the lighting circuit 5 to the light source unit 3 based on the output signal of the human sensor 7 and controlling the lighting and extinguishing of the LED 32.

  The operation of the lighting fixture configured as described above will be described. When a person is present in the detection area of the human sensor 7, the human sensor 7 detects infrared rays emitted from the human body, and a detection signal is transmitted to the control unit 10. And a lighting signal is transmitted to the lighting circuit 5 from the control part 10, and the lighting circuit 5 carries out lighting control of LED32 based on this. Further, when no person is present in the detection area of the human sensor 7 and infrared rays are no longer detected, the control unit 10 controls the LED 32 to be turned off after holding a predetermined lighting time.

  Here, the human sensor 7 is disposed in the central portion of the light source unit 3, but the influence of external noise is reduced, malfunctions are suppressed, and highly reliable operation can be ensured. It has become. First, since the LED 32 is controlled to be lit by being supplied with DC power by the lighting circuit 5, the human sensor 7 receives less noise from the power supply system.

  Further, the influence of noise due to the light emitted from the LED 32 is reduced. This will be described with reference to FIG. 5. FIG. 5 is a graph showing an emission spectrum of the white LED. The horizontal axis indicates the wavelength (nm), and the vertical axis indicates the spectral power (%). The emission spectrum of the white LED is a combination of the emission spectrum of the blue light of the LED chip and the emission spectrum of the yellow fluorescent material. Therefore, it has peak wavelengths at two points of about 470 nm and 575 nm. This has a smaller peak wavelength than the emission spectrum of the fluorescent lamp shown in FIG. 6, and noise corresponding to the human sensor 7 is reduced accordingly.

  And since the human sensor 7 can be disposed at the center of the light source unit 3, the deviation between the light irradiation range from the light source unit 3 and the detection range of the human sensor 7 can be reduced. It is possible to facilitate the layout design when installing the lighting fixture. Moreover, it is not necessary to provide a special installation space on the end side of the instrument body 1.

  On the other hand, the heat generated from the LED 32 is mainly transmitted to the heat radiating member 4 from substantially the entire back surface of the substrate 32, and is radiated through the heat radiating fins 41, thereby suppressing the temperature rise of the substrate 31. In this case, since heat (infrared rays) generated from the LED 32 may act on the human sensor 7, it is necessary to take measures such as setting the operating point of the human sensor 7 in consideration of this heat. Since the temperature of the central portion of the light source unit 3, that is, the central portion of the substrate 31, is relatively stable, it is possible to set an appropriate operating point and thus to provide a human sensor 7 that can prevent malfunction. It becomes. Incidentally, the temperature state of the peripheral part of the substrate 31 is easily influenced by the external environment, and it is difficult to be in a stable temperature state.

As described above, according to the present embodiment, the human sensor 7 is disposed at the center of the light source unit 3, and is disposed so as to protrude from the translucent cover 6 that covers the light source unit 3 and to be exposed to the outside. Therefore, malfunctions can be suppressed and reliable operation can be ensured. Moreover, the shift | offset | difference of the irradiation range of the light from the light source part 3 and the detection range of the human sensitive sensor 7 can be reduced, and the arrangement design of a lighting fixture can be facilitated. Furthermore, it is not necessary to provide a special installation space on the end side of the instrument body 1. In addition, since the temperature state of the central portion of the light source unit 3 is stable, the human sensor 7 can also set an appropriate operating point.

  Next, the lighting fixture which concerns on the 2nd Embodiment of this invention is demonstrated with reference to FIG. The figure shows a cross section of the luminaire. In addition, the same code | symbol is attached | subjected to the part which is the same as that of 1st Embodiment, or an equivalent, and the overlapping description is abbreviate | omitted. In the present embodiment, the substrate 71 on which the human sensor 7 is mounted is configured as a separate substrate from the substrate 31 that configures the light source unit 3.

  With such a configuration, in addition to the same effects as those of the first embodiment, the human sensor 7 can be less affected by the heat generated from the LEDs 32.

  Next, the lighting fixture which concerns on the 3rd Embodiment of this invention is demonstrated with reference to FIG. The figure shows a cross section of the luminaire. In addition, the same code | symbol is attached | subjected to the part which is the same as that of 1st Embodiment, or an equivalent, and the overlapping description is abbreviate | omitted. In the present embodiment, as in the second embodiment, the substrate 71 on which the human sensor 7 is mounted is configured as a separate substrate from the substrate 31 that constitutes the light source unit 3. The substrate 71 to be mounted is disposed on the back side of the substrate 31 and the lens of the human sensor 7 is disposed so as to face the window hole 61 of the translucent cover 6 through the window hole 31 a formed in the substrate 31. is there.

  Even with such a configuration, in addition to the same effects as those of the first embodiment, the human sensor 7 can be less affected by the heat generated from the LEDs 32.

  Next, the lighting fixture which concerns on the 4th Embodiment of this invention is demonstrated with reference to FIG. The figure has shown the cross section which expanded the principal part of the lighting fixture. In addition, the same code | symbol is attached | subjected to the part which is the same as that of 1st Embodiment, or an equivalent, and the overlapping description is abbreviate | omitted. In the present embodiment, the window hole 61a of the translucent cover 6 is formed in a tapered shape so as to be reduced in diameter from the upper side to the lower side so as to match the appearance shape of the human sensor 7. is there.

  Accordingly, the human sensor 7 is brought into contact with the window hole 61a so that there is no gap between the window hole 61a and the outer peripheral surface of the human sensor 7, and the light emitted from the LED 32 is received. Direct leakage is prevented, and light emitted from the LED 32 is emitted to the outside through the translucent cover 6.

  Next, the lighting fixture which concerns on the 5th Embodiment of this invention is demonstrated with reference to FIG.10 and FIG.11. The figure shows the bottom of the luminaire. In addition, the same code | symbol is attached | subjected to the part which is the same as that of 1st Embodiment, or an equivalent, and the overlapping description is abbreviate | omitted. The present embodiment is a modification of the shape of the instrument body 1.

  (Embodiment 1) As shown in FIG. 10, in this embodiment, the instrument body 1 is configured in a substantially square shape, and a light source section 3 in which a plurality of LEDs 32 are mounted in a matrix on a substantially square substrate 31. The human sensor 7 is disposed at the center of the.

  (Embodiment 2) As shown in FIG. 11, in this embodiment, the instrument body 1 is configured in a substantially circular shape, and a light source unit 3 in which a plurality of LEDs 32 are mounted on a substantially circular substrate 31 on a concentric circle. The occupant sensor 7 is disposed at the center of the slab.

  As described above, according to the configuration of the present embodiment, the same effects as those of the first embodiment can be obtained.

The present invention is not limited to the configuration of each of the embodiments described above, and various modifications can be made without departing from the spirit of the invention. In each embodiment, the thermal sensor using a pyroelectric infrared sensor as a human sensor has been described. However, the present invention is not limited thereto, and for example, a quantum infrared sensor may be used. Furthermore, an ultrasonic sensor or the like can be applied. The sensor is not limited to the human sensor, and an illuminance sensor may be provided .

DESCRIPTION OF SYMBOLS 1 ... Lighting fixture main body, 3 ... Light source part, 4 ... Heat dissipation member,
5 ... DC power supply (lighting circuit), 7 ... Sensor (human sensor),
31 ... substrate, 32 ... light emitting element (LED)

Claims (1)

A housing with a flange at the opening edge;
A light source unit including a substrate and a plurality of light emitting elements mounted on the substrate and housed in the housing ;
A light-transmitting cover that covers the light source part and has diffusibility, and has a circular window hole formed in the center;
The light source unit is disposed at the center of the light source unit and mounted on a substrate different from the substrate of the light source unit, and protrudes from the translucent cover so that the outer peripheral surface abuts on the inner peripheral side of the window hole A sensor that is arranged in such a manner that it is exposed to the outside and is arranged so that the top does not protrude beyond the flange ;
A DC power supply for supplying power to the light source;
The lighting fixture characterized by comprising.

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