JP2010262838A - Lighting device and lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting device and a lighting system, with a solid light-emitting element covered with an insulation transparent member, and which facilitate feeding power to the solid light-emitting element. <P>SOLUTION: The lighting device includes the insulation transparent member 100a, a light-emitting module 100 covered with the transparent member 100a, a charger 102 storing DC power, a power receiving coil 103 producing periodic power by electromagnetic induction, and a power supply circuit 104 converting the periodic power produced by the power receiving coil 103 into DC power. Then the light-emitting module 100 includes a solid light-emitting element 101a operated with DC power and emitting visible light, the solid light-emitting element 101a or the like is driven by at least either the power feeding by the power receiving coil 103 or the power stored in the charger 102. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an illumination device and an illumination system using solid light emitting elements such as LEDs (light emitting diodes), inorganic EL, and organic EL.

  For example, Patent Document 1 discloses an illumination device using a solid light emitting element.

JP 2006-210040 A

  The inventor newly develops an illuminating device in which a solid light emitting element is covered with an insulating transparent member. However, when the structure is covered with an insulating transparent member, it is difficult to supply power to the internal solid state light emitting device.

  The present invention has been made in view of such circumstances, and provides an illumination device and an illumination system capable of easily supplying power to a solid light emitting element while the solid light emitting element is covered with an insulating transparent member. The purpose is to provide.

  An illumination device according to a first aspect of the present invention includes an insulating transparent member, a light emitting unit covered with the transparent member, a charging unit that stores direct current power, a power receiving coil that generates periodic power by electromagnetic induction, A power supply circuit that converts the periodic power generated by the power receiving coil into DC power, and the light-emitting unit includes a solid-state light-emitting element that operates with direct-current power and emits visible light. It is driven by at least one of power feeding by the power receiving coil and power stored in the charging unit.

  Note that “periodic power” includes not only AC power whose magnitude and direction periodically change with time, but also power whose magnitude changes periodically. Further, the period of change may be constant (fixed) or variable.

  An illumination system according to a second aspect of the present invention includes the illumination device according to the first aspect, a power transmission coil that causes the power reception coil to generate periodic power by facing the power reception coil via the transparent member, Is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the electric power feeding to the solid light emitting element covered with the insulating transparent member can be performed easily.

It is a figure which shows schematic structure of the illuminating device and illumination system which concern on Embodiment 1 of this invention. 1 is a perspective view showing an internal configuration of a lighting device according to Embodiment 1. FIG. It is XZ sectional drawing of FIG. It is YZ sectional drawing of FIG. It is a figure which shows the circuit structure of the illumination system which concerns on Embodiment 1. FIG. FIG. 6 is a diagram for explaining the operation of the circuit shown in FIG. 5. It is a figure which shows schematic structure of the illuminating device and illumination system which concern on Embodiment 2 of this invention. It is a perspective view which shows the internal structure of the illuminating device which concerns on Embodiment 2. FIG. It is XZ sectional drawing of FIG. It is a figure which shows schematic structure of the illuminating device and illumination system which concern on Embodiment 3 of this invention. It is a figure which shows schematic structure of the illuminating device and illumination system which concern on Embodiment 4 of this invention. It is a figure which shows schematic structure of the illuminating device and illumination system which concern on Embodiment 5 of this invention. It is a figure which shows the 1st another example of a light emitting module. It is a figure which shows the 2nd another example of a light emitting module.

  Hereinafter, embodiments of a lighting device and a lighting system according to the present invention will be described with reference to the drawings.

  In the figure, arrows X1, X2, Y1, Y2, Z1, and Z2 indicate six directions related to three axes (XYZ axes) orthogonal to each other.

(Embodiment 1)
As shown in FIG. 1, the lighting system according to the present embodiment includes a lighting device 10 and a power transmission device 20. The power transmission device 20 includes a rectangular sheet-shaped power transmission coil 21, a control circuit 22, and an AC power source 23. The AC power source 23 is a commercial power source that is supplied from an electric power company, for example, to a house (for example, a general household or a business office) through an electric wire (infrastructure). The power transmission coil 21 is used to supply power to the lighting device 10 in a non-contact manner. One lighting device 10 can be installed on one power transmission coil 21.

  The lighting device 10 includes a light emitting module 100 (light emitting unit) and a transparent member 100a. The light emitting module 100 has a cubic outer shape, for example, and the transparent member 100a covers the light emitting module 100 with a substantially uniform thickness. The periphery (all six surfaces) of the light emitting module 100 is covered with the transparent member 100a. The transparent member 100a is made of an insulating transparent material. For example, a resin is preferably used as the transparent material. The size of the lighting device 10 is a size that can be carried with one hand, for example.

  As shown in FIG. 2 (perspective view), FIG. 3 (XZ sectional view of FIG. 2), and FIG. 4 (YZ sectional view of FIG. 2), the light emitting module 100 includes solid-state light emitting elements 101a to 101f, A charger 102 (charging unit) having a rectangular parallelepiped shape, a rectangular sheet-shaped power receiving coil 103, and a rectangular sheet-shaped power supply circuit 104 are provided. These are arranged in the Z-axis direction, for example, and are arranged in the order of the power receiving coil 103, the power supply circuit 104, and the charger 102 from the arrow Z1 side, for example.

  The solid light emitting elements 101a to 101f are arranged on each surface (each of six surfaces) of the light emitting module 100. The solid state light emitting devices 101a to 101f operate with direct current power and emit visible light. As the solid light emitting elements 101a to 101f, for example, surface-mounted LEDs (light emitting diodes) are preferably used. The light emission colors of the solid light emitting elements 101a to 101f may be the same color or different colors. When the illuminating device 10 is used as general illumination, the emission color of the solid light emitting elements 101a to 101f is preferably daylight color, daylight white, white, warm white, or light bulb color. The solid light emitting elements 101a to 101f radiate visible light in six directions of X, Y, and Z axes (directions of arrows X1, X2, Y1, Y2, Z1, and Z2) orthogonal to each other through the transparent member 100a.

  The charger 102 stores DC power. As the charger 102, for example, a secondary battery or the like is preferably used.

  The power receiving coil 103 is disposed in a place where the power receiving coil 103 can face the power transmitting coil 21 (for example, in the vicinity of the surface on the arrow Z1 side of the light emitting module 100). At the time of power feeding, the power receiving coil 103 is opposed to the power transmitting coil 21 through the transparent member 100a by arranging the power transmitting coil 21 in the vicinity of the arrow Z1 side of the lighting device 10. As a result, periodic power is generated in the power receiving coil 103 by electromagnetic induction.

  The power supply circuit 104 converts the periodic power generated by the power receiving coil 103 into DC power.

  FIG. 5 shows a circuit configuration of the illumination system according to the present embodiment.

  The control circuit 22 includes a rectifier circuit 22a and a coil drive circuit 22b. The rectifier circuit 22a is composed of, for example, a diode and a smoothing capacitor. The coil drive circuit 22b includes a transistor that is turned on / off at a high frequency and a switching control circuit thereof. The rectifier circuit 22a and the coil drive circuit 22b function as an inverter, and convert AC power of the AC power source 23 into high-frequency power.

  The power transmission coil 21 of the power transmission device 20 and the power reception coil 103 of the lighting device 10 constitute a transformer. By making the power transmission coil 21 and the power reception coil 103 face each other, they are magnetically coupled to each other without contact.

  Each of the solid light emitting elements 101 a to 101 f is electrically connected to the power receiving coil 103 via the power supply circuit 104. The solid light emitting elements 101a to 101f are connected in parallel to each other. The power supply circuit 104 includes a rectifier circuit 104a, a switching element 104b, a detection circuit 104c, and a constant current circuit 104d. A rectifier circuit 104 a is connected to the power receiving coil 103. For this reason, DC power is obtained from the high-frequency power generated by the power receiving coil 103 by the rectifier circuit 104a. When the switching element 104b is turned on, as shown in FIG. 5, the output (DC power) of the rectifier circuit 104a is supplied to each of the solid state light emitting elements 101a to 101f through the path L1, and the charger 102 through the path L2. To be supplied. Thereby, each of solid light emitting element 101a-101f light-emits, and charger 102 is charged. At this time, power is supplied to each of the solid light emitting elements 101a to 101f without passing through the charger 102. The current supplied to each of the solid state light emitting devices 101a to 101f is stabilized by the constant current circuit 104d. On the other hand, when the switching element 104b is turned off, as shown in FIG. 6, the electric power stored in the charger 102 is supplied to each of the solid state light emitting elements 101a to 101f through the path L3. Also in this case, the current supplied to each of the solid state light emitting devices 101a to 101f is stabilized by the constant current circuit 104d. The detection circuit 104c detects a current flowing into the constant current circuit 104d or a potential difference (voltage) between the power receiving coil 103 and the switching element 104b. In the present embodiment, the switching element 104b is common to the solid state light emitting elements 101a to 101f. However, the switching element 104b is provided for each of the solid state light emitting elements 101a to 101f so as to be individually controlled. It may be.

  The charger 102 includes a secondary battery 102a that stores DC power and a charging / discharging capacitor 102b. The rectifier circuit 104a is composed of, for example, a diode and a smoothing capacitor. Charging / discharging of the secondary battery 102a is switched according to the on / off state of the switching element 104b. In addition, the secondary battery 102a may be one or plural. A plurality of secondary batteries 102a may be connected in series or in parallel. Furthermore, you may make it switch a serial connection and a parallel connection by a switching element.

With the circuit configuration described above, the solid state light emitting devices 101 a to 101 f are driven by either power feeding by the power receiving coil 103 (power supplied from the AC power supply 23) or power stored in the charger 102. Which power is used for driving depends on the on / off state of the switching element 104b. The control mode of the switching element 104b is arbitrary. For example, when the switching element 104b is turned on while power is supplied from the power receiving coil 103 (AC power supply 23), and power is not supplied from the power receiving coil 103 (AC power supply 23). In addition, it is effective to turn off the switching element 104b.
The illuminating device 10 is placed on, for example, a sheet-shaped power transmission coil 21 while being fed by the power receiving coil 103, and is used as indoor or outdoor illumination (for example, indirect illumination or auxiliary illumination). Whether power is received by the power receiving coil 103 is detected based on, for example, a current or voltage detected by the detection circuit 104c. However, the method of detecting the presence or absence of power supply is not limited to this. For example, the presence or absence of power supply may be detected based on whether or not the lighting device 10 is placed on the power transmission coil 21. Whether or not the lighting device 10 is placed on the power transmission coil 21 is detected, for example, by providing the lighting device 10 with a switch pin that can be pushed and retracted when it is installed.

  According to the illumination system of the present embodiment, while the solid light emitting elements 101a to 101f are covered with the insulating transparent member 100a, it is easy to supply power (continuous power supply) to the solid light emitting elements 101a to 101f. It can be carried out. For this reason, this lighting system basically does not require charging by mechanical connection (wired charging) or battery replacement. And since it has the charger 102, the illuminating device 10 can be separated from the power transmission coil 21, and can be carried freely. In addition, even during a power failure (for example, at the time of a disaster), the power from the charger 102 can continue to emit light for a certain period of time.

  When used by a firefighter or the like at the time of a disaster, the lighting device 10 can be thrown into the room before entering a dangerous place without light. When using the illuminating device 10 for such a use, in order to ensure intensity | strength, it is preferable that the transparent member 100a has elasticity. As a material of the transparent member 100a, it is effective to use rubber or resin, for example.

  The place where the power transmission coil 21 is installed (the place where the lighting device 10 is installed) is arbitrary, and can be installed indoors, in a vehicle, or in a machine. By using the solid state light emitting devices 101a to 101f, it is possible to form a shape that is difficult for a fluorescent lamp or the like.

(Embodiment 2)
The illumination device and illumination system according to Embodiment 2 of the present invention will be described with a focus on differences from Embodiment 1 above. Here, the same elements as those shown in FIG. 1 are denoted by the same reference numerals, and the description of common parts that have already been described, that is, parts that are duplicated, is omitted for convenience. To do.

  In this embodiment, as shown in FIG. 7, the light emitting module 100 and the transparent member 100a each have, for example, a cylindrical outer shape. The periphery (upper surface, bottom surface, and side surfaces) of the light emitting module 100 is covered with the transparent member 100a.

  As shown in FIG. 8 (perspective view) and FIG. 9 (XZ sectional view of FIG. 8), the light emitting module 100 includes solid-state light emitting elements 101a and 101b, a rectangular sheet-shaped charger 102 (charging unit), A circular sheet-shaped power receiving coil 103 and a rectangular sheet-shaped power supply circuit 104 are provided. These are arranged in the Z-axis direction, for example, and are arranged in the order of the power receiving coil 103, the power supply circuit 104, and the charger 102 from the arrow Z1 side, for example. The power receiving coil 103 is disposed in a place where the power receiving coil 103 can face the power transmitting coil 21 (near the surface on the arrow Z1 side of the light emitting module 100).

  The solid state light emitting devices 101a and 101b are respectively disposed on the bottom surface (the surface on the arrow Z1 side) and the top surface (the surface on the arrow Z2 side) of the light emitting module 100. Thereby, the solid light emitting elements 101a and 101b emit visible light in two opposite directions (directions of arrows Z1 and Z2) via the transparent member 100a.

  Even in such a cylindrical light emitting module 100, an effect similar to the effect of the first embodiment described above can be obtained.

(Embodiment 3)
The illumination device and illumination system according to Embodiment 3 of the present invention will be described with a focus on differences from Embodiment 1 or 2. Here, the same elements as those shown in FIG. 1 are denoted by the same reference numerals, and the description of common parts that have already been described, that is, parts that are duplicated, is omitted for convenience. To do.

  As shown in FIG. 10, the illumination system according to the present embodiment includes rectangular sheet-shaped power transmission coils 21 a to 21 d and illumination devices 11 to 14. The illumination devices 11 to 14 have compatibility. That is, the illumination devices 11 to 14 can be powered by any of the power transmission coils 21a to 21d. Here, the illuminating devices 11 to 13 have, for example, the same structure as that shown in FIG. 1, and the illuminating device 14 has the same structure as that shown in FIG. However, the structures of the lighting devices 11 to 14 are arbitrary. Also, the number of lighting devices is arbitrary.

  The illumination system according to the present embodiment can be used for indirect illumination or auxiliary illumination, for example, by providing the power transmission coils 21a to 21d on the ceiling, walls, stairs, floor, and the like. Moreover, it is highly convenient because it can be exchanged at each place. Also in this case, the illuminating devices 11 to 14 can be freely carried away from the power transmission coils 21a to 21d.

(Embodiment 4)
The illumination device and illumination system according to Embodiment 4 of the present invention will be described focusing on the differences from the above Embodiments 1 to 3. Here, the same elements as those shown in FIG. 1 are denoted by the same reference numerals, and the description of common parts that have already been described, that is, parts that are duplicated, is omitted for convenience. To do.

  In the illumination system according to the present embodiment, as illustrated in FIG. 11, one surface of the power transmission coil 21 (for example, the surface on the arrow Z2 side) is an installation surface of the illumination devices 11 to 17 (for example, the surface on the arrow Z1 side). It has an area larger than the sum of the areas. For this reason, these illuminating devices 11-17 can be simultaneously installed in the surface. Here, the illuminating devices 11 to 15 have the same structure as that shown in FIG. 1, for example, and the illuminating devices 16 and 17 have the same structure as that shown in FIG. However, the structures of the lighting devices 11 to 17 are arbitrary. Also, the number of lighting devices is arbitrary.

  By installing the lighting devices 11 to 17 on the power transmission coil 21, the power receiving coils 103 (see FIG. 2 or FIG. 8) of each of the lighting devices 11 to 17 and the power transmission coil 21 face each other, and the lighting devices 11 to 17 are connected. The power is supplied by the power transmission coil 21. Therefore, according to the illumination system of the present embodiment, the illumination devices 11 to 17 can be charged efficiently. The power transmission coil 21 of the present embodiment is a power supply unit common to the lighting devices 11 to 17 and can be used to supply power to all of the lighting devices 11 to 17.

(Embodiment 5)
The illumination device and illumination system according to Embodiment 5 of the present invention will be described with a focus on differences from Embodiments 1 to 4. Here, the same elements as those shown in FIG. 1 are denoted by the same reference numerals, and the description of common parts that have already been described, that is, parts that are duplicated, is omitted for convenience. To do.

  In the lighting system according to the present embodiment, the transparent member 100a (see FIG. 1 or FIG. 7) of the lighting devices 11 to 14 (FIG. 12) has water resistance. Here, the illuminating device 11 has a structure similar to the structure shown in FIG. 7, for example, and the illuminating devices 12 to 14 have a structure similar to the structure shown in FIG. However, the structures of the lighting devices 11 to 14 are arbitrary. Also, the number of lighting devices is arbitrary.

  As shown in FIG. 12, the lighting devices 11 to 14 are used in water W put in a water tank 200, for example. The power transmission coil 21 is installed, for example, on the bottom surface of the water tank 200 (the surface on the arrow Z1 side). Also in this case, each power receiving coil 103 (see FIG. 2 or FIG. 8) of the illuminating devices 11 to 14 and the power transmitting coil 21 face each other, and the illuminating devices 11 to 14 are respectively fed by the power transmitting coil 21. The power transmission coil 21 is a power supply unit common to the lighting devices 11 to 14 and is used to supply power to all of the lighting devices 11 to 14.

  The lighting devices 11 to 14 can be used for decoration, for example, in the aquarium 200 for breeding ornamental fish. However, the present invention is not limited to this, and may be used in the sea or river, or for construction or cleaning of a sewer pipe or the like. Moreover, since it can be used even if it gets wet in the rain, the illuminating devices 11-14 whose transparent member 100a has water resistance are effective also at the time of a disaster.

(Other embodiments)
As mentioned above, although the illuminating device and illumination system which concern on embodiment of this invention were demonstrated, this invention is not limited to the said embodiment. For example, the present invention can be modified as follows.

  The lighting device 10 may be detachably fixed to the power transmission coil 21. By doing so, failure due to dropping or the like can be suppressed. However, in applications that are frequently carried, the fixing is preferably simple.

  In the first or second embodiment, the light emitted from the solid light emitting elements 101a to 101f (FIGS. 3 and 4) or the solid light emitting elements 101a and 101b (FIG. 9) may be scattered by the transparent member 100a. For example, light can be scattered by adjusting the material, cut angle, and additive of the transparent member 100a. By doing so, the lighting device 10 can emit light radially around the light emitting module 100.

  A power receiving coil may be provided on a plurality of surfaces of the light emitting module 100. For example, as shown in FIG. 13, power receiving coils 103 a to 103 f may be arranged on each surface (each of six surfaces) of the light emitting module 100. By doing so, the installation surface of the light emitting module 100 can be freely selected. In the example of FIG. 13, all six planes of the light emitting module 100 can be installation surfaces. On the other hand, since the cylindrical light emitting module 100 has a plane-symmetric shape with respect to the Z-axis direction, it is effective to provide power receiving coils 103a and 103b on each of the upper surface and the bottom surface (both are flat) as shown in FIG. It is. By doing so, it becomes possible to install the light emitting module 100 upside down.

  With respect to other points as well, the configuration of the lighting device or the circuit thereof can be arbitrarily changed without departing from the spirit of the present invention.

  For example, the shape of the lighting device 10 is arbitrary, and may be a rectangular parallelepiped, a polygonal column, a cone, a polygonal pyramid (for example, a triangular pyramid), or another polyhedron. Alternatively, the illumination device 10 may have a spherical outer shape, and visible light may be emitted radially from the light emitting module 100 disposed at the center thereof.

  It is not essential that the transparent material of the transparent member 100a has elasticity. For example, glass or the like may be used as the transparent material.

  For example, instead of LEDs, inorganic EL, organic EL, or the like may be used as the solid light emitting elements 101a to 101f. Moreover, the number of solid state light emitting elements is also arbitrary.

  The embodiments of the present invention have been described above. However, various modifications and combinations necessary for design reasons and other factors are described in the invention described in the claims and the embodiments of the invention. It should be understood that the invention falls within the scope of the invention corresponding to the specific examples described.

  The illumination device and illumination system of the present invention are suitable for general illumination.

10 to 17 Illumination device 20 Power transmission device 21, 21a to 21d Power transmission coil 22 Control circuit 22a Rectification circuit 22b Coil drive circuit 23 AC power supply 100 Light emitting module (light emitting unit)
100a Transparent member 101a-101f Solid light emitting element 102 Charger (charging part)
102a Secondary battery 102b Charging / discharging capacitor 103, 103a to 103f Power receiving coil 104 Power supply circuit 104a Rectifier circuit 104b Switching element 104c Detection circuit 104d Constant current circuit 200 Water tank

Claims (18)

An insulating transparent member;
A light emitting part covered by the transparent member;
A charging unit that stores DC power;
A power receiving coil that generates periodic power by electromagnetic induction;
A power supply circuit that converts the periodic power generated by the power receiving coil into DC power;
With
The light-emitting unit includes a solid-state light-emitting element that operates with direct-current power and emits visible light, and the solid-state light-emitting element is driven by at least one of power feeding by the power receiving coil and power stored in the charging unit. ,
A lighting device characterized by that. The charging unit, the power receiving coil, and the power supply circuit are incorporated in the light emitting unit.
The lighting device according to claim 1. Have a portable size,
The illumination device according to claim 1, wherein In the light emitting part, the solid light emitting element emits visible light in at least two opposite directions through the transparent member.
The lighting device according to any one of claims 1 to 3, wherein In the light emitting unit, the solid state light emitting element emits visible light in at least six directions of XYZ axes orthogonal to each other through the transparent member.
The lighting device according to claim 4. At least while being fed by the power receiving coil, it is used as indirect lighting or auxiliary lighting,
The lighting device according to any one of claims 1 to 5, wherein The transparent member has elasticity,
The illumination device according to any one of claims 1 to 6, wherein The transparent member is a resin.
The lighting device according to claim 7. The transparent member has water resistance,
The illumination device according to any one of claims 1 to 8, wherein The transparent member scatters visible light emitted from the solid state light emitting device,
The illumination device according to claim 1, wherein the illumination device is a light source. The light emitting unit has at least two planes,
The power receiving coil is provided on at least two planes of the light emitting unit,
The lighting device according to any one of claims 1 to 10, wherein The light emitting section has a rectangular parallelepiped or cubic outer shape, and the solid light emitting elements are disposed on at least six surfaces thereof,
The lighting device according to any one of claims 1 to 11, wherein The light emitting part has a cylindrical outer shape, and the solid light emitting element is disposed at least on the upper surface and the bottom surface, respectively.
The lighting device according to any one of claims 1 to 11, wherein A switching element for switching between power feeding by the power receiving coil and power stored in the charging unit to drive the solid state light emitting element;
The lighting device according to claim 1, wherein The lighting device according to any one of claims 1 to 14,
A power transmission coil that causes the power reception coil to generate periodic power by facing the power reception coil via the transparent member;
Comprising
A lighting system characterized by that. A power supply for supplying periodic power;
An inverter that supplies the periodic power of the power source to the power transmission coil as a periodic power of a higher period;
Further comprising
The lighting system according to claim 15. A plurality of the power transmission coils are provided, and the lighting device according to any one of claims 1 to 14 is installed in each of the power transmission coils.
Even if any two of the lighting devices are replaced, power can be supplied by the power transmission coil.
The illumination system according to claim 15 or 16, characterized in that A plurality of lighting devices according to any one of claims 1 to 14,
At least one surface of the power transmission coil has an area capable of facing the power reception coil of each of the plurality of lighting devices.
The illumination system according to any one of claims 15 to 17.

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