TW202004083A - Lighting appliance which can suppress an occurrence of weak light emission from a light emitting device when a base on which the light emitting device is arranged is grounded - Google Patents

Abstract

An object of the present invention is to provide a lighting appliance which can suppress an occurrence of weak light emission from a light emitting device such as a light source module when a base on which the light emitting device is arranged is grounded, even if no countermeasure is taken against the weak light emission. The lighting appliance 1 of this invention is arranged at a mounting portion and comprises a base (an appliance body 10) and a light emitting device (a light source module 20) disposed on the base; when the lighting appliance 1 is arranged on the mounting portion, the base is connected and grounded, and the light emitting device and the base are separated from each other. The light emitting device includes a substrate and a plurality of light emitting units, and the substrate is spaced from the base. An insulation sheet is further provided and arranged between the base and the substrate.

Description

Lighting appliance

The present invention relates to a lighting appliance, particularly a lighting appliance having a light emitting element such as an LED (Light Emitting Diode) element.

LED components are used as light sources for various products due to their small size, high efficiency, and long service life. For example, various lighting devices (LED lighting) using LED elements as light sources have been put into practical use.

With regard to LED lighting, there are known light bulb-shaped LED lamps (LED bulbs) that replace bulb-shaped fluorescent lamps or incandescent bulbs, or ceiling-mounted ceiling lamps or downlights.

For example, a ceiling lamp with LED elements includes: a metal appliance body used as a base; a light source module, which is arranged on the appliance body; a light-transmitting cover, which is installed on the appliance body in such a manner as to cover the light source module; and a power supply circuit , To generate power to make the light source module emit light. The light source module has: a light source substrate with wiring formed; and a plurality of LED elements embedded in the light source substrate. [Prior Technical Literature]

[Patent Document 1] Japanese Unexamined Patent Publication No. 2012-243479

[Problem to be solved by invention]

When a lighting fixture such as a ceiling lamp is installed on a building material such as a ceiling, the body of the fixture equipped with a light source module may be grounded. At this time, stray capacitance may be generated between the light source module and the appliance body due to the combined voltage of the AC voltage of the commercially available electric power supply and the ground voltage. Specifically, stray capacitance is generated between the wiring formed on the light source substrate having the light source module and the appliance body connected to the ground.

At this time, the superimposed voltage of the 50/60 Hz AC voltage supplied to the power supply line of the commercial power supply and the ground voltage may be applied between the light source module and the appliance body. The group generates leakage current. As a result, even if the ceiling lamp is turned off by the control of the remote control and the power supply from the power supply circuit to the light source module is stopped, the leakage current generated by the light source module due to the above stray capacitance will still flow to the LED element so that the LED The case where the element glows faintly. Therefore, even if it is considered that the ceiling lamp has been extinguished, the light source module (LED element) may be weakly lit and slightly lit.

In the past, in order to suppress the faint light emission of such an LED element, a method of embedding a capacitor connected in parallel with the LED element in a light source module has been proposed (Patent Document 1). By this method, even if stray capacitance is generated between the grounded appliance body and the light source module to generate a leakage current, since the leakage current can flow to the capacitor side, the leakage current can still be prevented from flowing to the LED The component side. With this, weak emission of the LED element can be suppressed.

However, the technology disclosed in Patent Document 1 inserts a capacitor for weak light emission measures into the light source module even when the device body is not connected to ground. That is, in the case where the appliance body is not connected to ground, the capacitor for weak light emission countermeasures is useless, resulting in redundant design of the light source module. Therefore, we can think about: only when the body of the appliance adopts the specification of ground connection, the light source module with the capacitor for weak light emission countermeasures is mounted. However, since the light source module is changed depending on whether the body of the appliance is grounded, the assembly work of the lighting appliance becomes complicated and other issues. In addition, in the method of embedding capacitors for weak light emission countermeasures in the light source module, the light source module must be changed one by one according to each type or destination of the light fixture, which makes it difficult to achieve universalization of the light source module.

For example, when a lighting appliance of the Japanese domestic market that is premised on the premise that the appliance body is not connected to the ground is to be extended to an overseas market where the appliance body is connected to the ground, in the past, in order to suppress the occurrence of the light source module (LED Components) In the case of weak light emission, it is necessary to design light source modules of overseas market specifications that have imposed weak light emission measures. Therefore, the common light source module cannot be used for both the domestic market-specification lighting fixtures and the overseas market-specification lighting fixtures, and the generalization of the light source module cannot be achieved.

The present invention has been completed to solve this problem, and its object is to provide a lighting fixture that can be suppressed even when a light emitting device such as a light source module is not subjected to weak light emission countermeasures when the base of the light emitting device is grounded The light-emitting device is weakly emitting light. [Means to solve the problem]

In order to achieve the above object, one aspect of the lighting fixture according to the present invention is a lighting fixture, which is installed on a mounted portion, includes a base, and a light-emitting device disposed on the base, where the lighting fixture is installed on When the part is to be mounted, the base is grounded, and the light emitting device and the base are separated from each other. [Effect of invention]

According to the present invention, even if no countermeasure against weak light emission is applied to the light emitting device, it is possible to suppress the weak light emission of the light emitting device when the base on which the light emitting device is disposed is grounded.

Hereinafter, the embodiment of the present invention will be described with reference to the drawings. Any of the embodiments described below is a specific example of the present invention. Therefore, the numerical values, shapes, materials, constituent elements, arrangement positions and connection aspects of the constituent elements shown in the following embodiments are only examples, and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, the constituent elements that are not described in the independent claim that shows the most general concept of the present invention are described as arbitrary constituent elements.

In addition, each drawing is a schematic diagram, and it is not necessarily a strict illustration. In each drawing, the substantially same configuration is denoted by the same symbol, and repeated description is omitted or simplified.

In this specification and drawings, the X-axis, Y-axis, and Z-axis represent three axes of the three-dimensional vertical coordinate system. In this embodiment, the Z-axis direction is the vertical direction, and the Z-axis is perpendicular to the Z-axis. The direction (the direction parallel to the XY plane) is the horizontal direction. The X axis and the Y axis are perpendicular to each other, and either of them is an axis perpendicular to the Z axis. In addition, the positive direction of the Z-axis direction is vertically downward.

(Implementation) Next, the configuration of the lighting fixture 1 according to the embodiment will be described using FIGS. 1 to 4. FIG. 1 is an external view of a lighting fixture 1 according to an embodiment. FIG. 2 is an exploded perspective view of the lighting fixture 1. FIG. 3 is a half cross-sectional view when the same lighting fixture 1 is installed on the ceiling 2. FIG. 4 is a partially enlarged cross-sectional view of the lighting fixture 1. In addition, FIGS. 3 and 4 illustrate only the cross-sectional portion of the lighting fixture 1.

The lighting apparatus 1 shown in FIG. 1 is installed in a mounted part such as construction materials in a house or a store. The lighting fixture 1 of the present embodiment is a ceiling lamp, and as shown in FIG. 3, it is installed on the ceiling 2 as an installed part. Specifically, the lighting fixture 1 is installed on the ceiling 2 by the ceiling lamp base body 2a installed on the ceiling 2. The suspended ceiling lamp base body 2a is used to supply power to the power supply part of the lighting fixture 1, and is electrically connected to a commercially available electric power supply (system power supply) by wires or the like inside the ceiling 2, for example. The lighting fixture 1 can receive electric power from a commercially available electric power source by being mounted on the suspended ceiling lamp base body 2a.

As shown in FIGS. 1 to 4, the lighting fixture 1 according to this embodiment includes an apparatus body 10, a light source module 20, an insulating sheet 30, a light source cover 40, a light-transmitting cover 50 and a power circuit 60.

Hereinafter, each component of the lighting fixture 1 according to this embodiment will be described in detail using FIGS. 1 and 2.

[Apparatus body (base)] The apparatus body 10 is an example of a base. As shown in FIGS. 1 to 3, it supports the light source module 20, the insulating sheet 30, the light source cover 40 and the light-transmitting cover 50. In this embodiment, the fixture body 10 constitutes a peripheral member of the lighting fixture 1. The instrument body 10 is made of sheet metal, and is formed into a predetermined shape by pressing a sheet metal such as a steel plate or an aluminum plate.

A part of the appliance body 10 has a protrusion 11 protruding toward the bottom side (vertically downward). The protruding portion 11 is a supporting portion that supports the light source module 20 and the insulating sheet 30. Therefore, the bottom side surface of the protruding portion 11 is a disposing surface 11 a for disposing the light source module 20 and the insulating sheet 30. Specifically, the insulating sheet 30 is arranged on the arrangement surface 11 a of the protruding portion 11, and the substrate 21 of the light source module 20 is arranged on the bottom surface side of the insulation sheet 30. The protruding portion 11 is formed by pressing to have a substantially trapezoidal cross-sectional shape. As for the shape of the protrusion 11 in plan view, the arrangement surface 11a is a circular ring (annular) having a certain width.

In addition, an opening 12 is formed in the central portion of the device body 10. As shown in FIG. 3, in the opening 12, an adapter 80 is installed by a cylindrical support member 70. The adapter 80 is a connecting member for a suspended ceiling lamp holder that is electrically and mechanically connected to the suspended ceiling lamp holder body 2a. Although the detailed structure of the adapter 80 is not shown in FIG. 3, the adapter 80 is provided with a pair of L-shaped clips for hooking on a pair of holes in the main body 2a of the suspended ceiling lamp holder to obtain electrical contacts .

When the lighting fixture 1 is installed on the ceiling 2, the adaptor 80 is first installed on the suspended ceiling lamp base body 2a, and then the support member 70 fixed to the opening 12 of the fixture body 10 is installed on the adaptor In the manner of the appliance 80, the appliance body 10 is pushed upward toward the side of the ceiling 2. Thereby, both the support member 70 and the adapter 80 are locked, the lighting fixture 1 is fixed to the ceiling 2, and both the suspended ceiling lamp base body 2a and the lighting fixture 1 are electrically and mechanically connected. As described above, the suspended ceiling lamp base body 2a is supplied with AC power from an external power source such as a commercially available power source. Therefore, by installing the adaptor 80 on the suspended ceiling lamp base body 2a, the adaptor 80 is supplied with AC power.

In addition, in the present embodiment, when the lighting device 1 is mounted on the mounted portion, the device body 10 is configured to be grounded. In this embodiment, after the lighting fixture 1 is installed on the ceiling 2, the fixture body 10 is grounded (ie, grounded), and the metal fixture body 10 is at a ground potential.

Specifically, the device body 10 is connected to the ground via the adapter 80 by being mounted on the adapter 80. For example, in the case where the suspended ceiling lamp base body 2a is provided with a wire (ground wire) of a ground potential, the appliance body 10 is passed through the adapter 80 installed on the suspended ceiling lamp base body 2a The connector 80 is grounded. In addition, the ground connection method of the appliance body 10 is not limited to this. For example, the appliance body 10 may be connected to ground without passing through the adapter 80. In this case, after the lighting fixture 1 is installed on the ceiling 2, the grounding connection of the fixture body 10 may also be performed by additionally grounding the fixture body 10.

[Light source module (light emitting device)] The light source module 20 is an example of a light emitting device. The light source module 20 is a light source of the lighting fixture 1 and emits, for example, white light as main lighting light. As shown in FIGS. 3 and 4, the light source module 20 is supported on the appliance body 10. Specifically, the light source module 20 is arranged on the protruding portion 11 of the appliance body 10 via the insulating sheet 30.

As shown in FIGS. 2 to 4, the light source module 20 includes a substrate 21 and one or more light-emitting elements 22 disposed on the substrate 21. In this embodiment, the light-emitting element 22 is composed of LEDs. Therefore, the light source module 20 is an LED module.

The substrate 21 is a light source substrate configured by a light source, that is, a light emitting element 22. Specifically, as shown in FIGS. 3 and 4, the substrate 21 includes: a first surface 21 a for the light-emitting element 22 to be fitted into; and a second surface 21 b located on the opposite side to the first surface 21 a. As shown in FIG. 2, the substrate 21 of the present embodiment is composed of four substrates arranged in an annular shape and each formed into an arc shape. However, for convenience of explanation, the assembly of these four substrates is regarded as one substrate 21 to explain. In addition, the number of substrates constituting the substrate 21 is not limited to four, and may be two, three, or five or more. In addition, the substrate 21 is not limited to being composed of a plurality of substrates, but may be a circular substrate having a through hole in the center portion.

The substrate 21 is an embedding substrate for embedding the light emitting element 22. For example, the substrate 21 is a printed wiring board in which wiring is formed in a predetermined shape. The wiring is, for example, metal wiring composed of a thin metal film of copper, silver, or the like. The base material of the substrate 21 may be: a resin substrate composed of an insulating resin material, a metal base substrate whose surface is coated with resin and composed of a metal material, a sintered body of ceramic material, that is, a ceramic substrate, or a glass material Glass substrates, etc. In this embodiment, an insulating substrate whose base material is a resin substrate is used as the substrate 21. For example, the substrate 21 is composed of a glass epoxy substrate (CEM-3, FR-4, etc.). The thickness of the substrate 21 is, for example, 0.5 mm to 2 mm (1 mm in the present embodiment), but it is not limited thereto.

In addition, the surface of the substrate 21 may be coated with an insulating film such as a white photoresist film so as to cover the metal wiring, except for the portion (land portion) that is solder-bonded with the embedded component such as the light-emitting element 22. The substrate 21 is not limited to a rigid substrate, and may be a flexible substrate. The substrate 21 may be a single-sided substrate with wiring formed on only one side, or a double-sided substrate with wiring formed on both sides.

A connector as an external connection terminal is embedded in the substrate 21. Leads drawn from the power supply circuit 60 are inserted into the connector. With this, the DC power generated by the power supply circuit 60 is supplied to the light-emitting element 22 via the wiring formed on the substrate 21, so that the light-emitting element 22 emits light.

The light emitting element 22 is embedded on the first surface 21a of the substrate 21. In this embodiment, a plurality of light-emitting elements 22 are formed in a plurality of circular arrays so as to surround the opening of the substrate 21 and are embedded in the substrate 21.

Each light-emitting element 22 is, for example, a surface mount (SMD) type LED element that is individually packaged, and includes: a package body (container) made of white resin and having a recess; an LED chip is initially mounted on the package body The bottom surface of the recess; and the sealing member, encapsulated in the recess of the package body. The sealing member is made of a translucent resin material such as silicone resin. The sealing member may be a phosphor-containing resin containing a wavelength conversion material such as phosphor.

The LED chip is an example of a semiconductor light-emitting element that emits light with a predetermined DC power, and is a bare chip that emits monochromatic visible light. The LED chip is, for example, a blue LED chip that emits blue light when powered on. At this time, in order to obtain white light, the sealing member contains a yellow phosphor such as YAG (yttrium·aluminum·garnet) that emits fluorescence using blue light from the blue LED chip as excitation light.

As described above, the light-emitting element 22 in this embodiment is a B-Y type white LED light source composed of a blue LED chip and a yellow phosphor. Specifically, the yellow phosphor absorbs part of the blue light emitted by the blue LED chip to be excited and emits yellow light, and the yellow light and the blue light not absorbed by the yellow phosphor are mixed with each other to become white light. In addition to the yellow phosphor, the sealing member may contain red phosphor or green phosphor.

In addition, the light source module 20 may adopt a monochromatic type in which all the light-emitting elements 22 have the same luminous color, or may adopt a toning type in which the main illumination light of the lighting fixture 1 can be toned. When a color-type light source module 20 is used, the plurality of light-emitting elements 22 includes a plurality of light-emitting elements 22 having different light-emitting colors such as color temperature. At this time, for example, plural light-emitting elements 22 may be composed of a first light-emitting element that emits light with a high color temperature (for example, natural white) and a second light-emitting element that emits light with a low color temperature (for example, incandescent lamp color). In addition, the connection state of a plurality of light-emitting elements 22 (series connection, parallel connection, and a combination of serial connection and parallel connection, etc.) is not particularly limited.

The light source module 20 configured in this manner is disposed on the appliance body 10, but as shown in FIGS. 3 and 4, the light source module 20 and the appliance body 10 are separated from each other. That is, the light source module 20 and the appliance body 10 are not in contact, but are arranged at a certain distance. Specifically, the substrate 21 and the appliance body 10 of the light source module 20 are separated from each other, and the substrate 21 and the appliance body 10 are arranged at a certain distance.

In this embodiment, the insulating sheet 30 is inserted between the light source module 20 and the appliance body 10. That is, by inserting the insulating sheet 30 as a spacer between the light source module 20 and the appliance body 10, the light source module 20 and the appliance body 10 are separated from each other.

The substrate 21 of the light source module 20 is placed on the protruding portion 11 of the appliance body 10 via the insulating sheet 30. Specifically, the substrate 21 is placed on the protruding portion 11 of the appliance body 10 via the insulating sheet 30 in a state where the second surface 21 b is located on the side of the appliance body 10. That is, the substrate 21 is arranged on the protruding portion 11 such that the second surface 21b faces the ceiling side and the first surface 21a faces the bottom side.

As described above, the light source module 20 mounted on the appliance body 10 is fixed to the appliance body 10. Specifically, by inserting a screw into the screw holes provided in the light source cover 40, the insulating sheet 30, and the substrate 21, and locking the screw into the screw hole in the appliance body 10, the light source module 20 can be fixed to具体10。 The apparatus body 10. Specifically, both the light source module 20 (substrate 21) and the insulating sheet 30 are clamped together by screws to fix the appliance while being clamped by both the light source cover 40 and the protrusion 11 of the appliance body 10 Body 10.

[Insulation sheet] As shown in FIGS. 3 and 4, an insulating sheet 30 is arranged between both the light source module 20 and the appliance body 10. Thereby, both the light source module 20 and the appliance body 10 can be separated. Specifically, the insulating sheet 30 is sandwiched by both the light source module 20 and the appliance body 10, and the light source module 20 and the appliance body 10 are separated by a distance just as thick as the insulating sheet 30.

In this embodiment, the insulating sheet 30 is inserted between the substrate 21 of the light source module 20 and the appliance body 10. That is, both the substrate 21 and the device body 10 are separated by the insulating sheet 30. Specifically, the insulating sheet 30 is sandwiched between both the substrate 21 of the light source module and the appliance body 10. More specifically, the insulating sheet 30 is arranged on the arrangement surface 11a of the protrusion 11 of the appliance body 10, and one surface of the insulation sheet 30 (the surface on the side of the ceiling 2) and the arrangement surface 11a of the protrusion 11 of the appliance body 10 are performed In surface contact, the other surface (the bottom surface) of the insulating sheet 30 makes surface contact with the second surface 21b of the substrate 21 of the light source module 20.

The insulating sheet 30 is a sheet member made of insulating material. For example, the insulating sheet 30 is a resin sheet composed of an insulating resin material. In the present embodiment, the insulating sheet 30 uses a thin resin film made of polyester such as polyethylene terephthalate (PET). The thickness of the insulating sheet 30 is 5 mm or less, preferably 1 mm or less, and more preferably 0.5 mm or less. In addition, the thickness of the insulating sheet 30 is not limited to this.

[Light source cover] As shown in FIGS. 2 to 4, the light source cover 40 is a cover member that covers the light emitting element 22 disposed on the substrate 21. The light source cover 40 is a light-transmitting cover that transmits light emitted from the light-emitting element 22. That is, the light emitted from the light emitting element 22 enters the light source cover 40 and transmits through the light source cover 40. By arranging the light source cover 40, the light emitting element 22 can be protected and the user can not touch the charging portion of the substrate 21.

In the present embodiment, the light source cover 40 has a light distribution control function for controlling the light distribution of the light emitted from the light emitting element 22. Specifically, the light source cover 40 is a lens cover having a lens function, and includes a lens portion 41 corresponding to each of the plurality of light emitting elements 22. That is, the plural lens portions 41 are formed in a one-to-one correspondence with the plural light emitting elements 22, and each lens portion 41 has a function of enlarging the light distribution angle of the light emitted from the corresponding light emitting element 22. The lens portion 41 is formed over the entire light source cover 40 so as to correspond to the arrangement of the plurality of light emitting elements 22.

The light source cover 40 can be formed using a light-transmitting resin material. For example, the material of the light source cover 40 is acrylic (PMMA), polycarbonate (PC), polyethylene terephthalate (PET), or the like. In addition, in the present embodiment, the light source cover 40 is transparent and does not have light diffusivity (light scattering), but the light source cover 40 may have light diffusivity.

The light source cover 40 is shaped to surround the opening 12 of the appliance body 10. The light source cover 40 is formed in a ring shape so as to cover a plurality of light-emitting elements 22 arranged in a ring shape. In this embodiment, the light source cover 40 has an annular shape in plan view. The light source cover 40 configured in this manner is fixed to the appliance body 10 with screws as described above.

[Translucent cover] As shown in FIGS. 1 to 3, the transparent cover 50 is a cover member that covers the light source module 20. In this embodiment, the light-transmitting cover 50 also covers: covers the insulating sheet 30 and covers the light source cover 40 of the light source module 20.

In addition, the light-transmitting cover 50 is a peripheral cover that constitutes a peripheral member of the lighting fixture 1. The light-transmitting cover 50 is a lamp bulb covering the entire body of the appliance body 10. The light-transmitting cover 50 is attached to the apparatus body 10 in a detachable manner.

The light-transmitting cover 50 is a light-transmitting member having light-transmitting properties, so that the light emitted from the light source module 20 and transmitted through the light source cover 40 is transmitted. That is, the light incident on the inner surface of the light-transmitting cover 50 is transmitted through the light-transmitting cover 50 and is extracted to the outside of the light-transmitting cover 50.

The light-transmitting cover 50 can be formed using a light-transmitting resin material. For example, the material of the light-transmitting cover 50 is acrylic, polycarbonate, polyethylene terephthalate or polyvinyl chloride.

In addition, the light-transmitting cover 50 has light diffusibility. By making the light-transmitting cover 50 light-diffusing, the light from the light source cover 40 incident on the light-transmitting cover 50 can be diffused (scattered), so the light can be uniformly extracted from the entire light-transmitting cover 50 To the outside.

At this time, for example, by designing the light-transmitting cover 50 to be milky white, the light-transmitting cover 50 can have light diffusivity. Specifically, by forming the light-transmitting cover 50 by using a resin material in which light-diffusing particles are dispersed, the light-transmitting cover 50 can have light diffusibility. Furthermore, by forming a milky white light diffusion film on the inner surface or the outer surface of the light-transmitting cover 50, the light-transmitting cover 50 may have light diffusibility. Alternatively, a plurality of light diffusion points or a plurality of minute irregularities (surface textures) may be formed on the surface of the transparent light-transmitting cover 50 to have light diffusibility. Furthermore, by forming a plurality of light diffusion points or a plurality of minute irregularities on the milky white light-transmitting cover 50, it is also possible to provide light diffusion.

The shape of the light-transmitting cover 50 is a shape that conforms to the shape of the device body 10, and in this embodiment is a circular dome. In addition, when the apparatus body 10 has a square shape, the shape of the light-transmitting cover 50 may be a rectangular dome.

[Power Circuit] The power supply circuit 60 is a power supply device that generates power for lighting the light source module 20. The power supply circuit 60 is electrically connected to the adapter 80 mounted on the suspended ceiling lamp base body 2a, and the suspended ceiling lamp base body 2a and the adapter 80 are used to supply the power circuit 60 with an external source from a commercially available electric power source, etc. AC power from the power supply. As shown in FIG. 3, for example, both the adapter 80 and the power supply circuit 60 are electrically connected by a lead or the like, and the AC power supplied to the adapter 80 is supplied to the power supply circuit 60 via the lead or the like.

The power supply circuit 60 converts the AC power supplied to the power supply circuit 60 into DC power and supplies it to the light source module 20. Since DC power is supplied to the light source module 20, the light source module 20 (light emitting element 22) emits light. In the present embodiment, the power supply circuit 60 controls the lighting (full lighting) and lighting off of the light source module 20. In addition, the power circuit 60 may perform dimming or color adjustment of the light source module 20.

The power circuit 60 includes, for example, a circuit board (power board) and a plurality of circuit elements embedded in the circuit board. The circuit board is a printed wiring board on which metal wiring is formed in a predetermined shape. The plural circuit elements are capacitive elements such as electrolytic capacitors or ceramic capacitors, resistive elements such as resistors, rectifier circuit elements, coil elements, choke coils (current transformers), noise filters, diode elements or products. Semiconductor elements such as body circuit elements. The power supply circuit 60 constitutes, for example, a constant current circuit, but the current output to the light emitting element 22 may be limited by a constant voltage circuit and a resistor.

The power circuit 60 configured in this way is housed in a recess provided on the ceiling side of the protruding portion 11 of the appliance body 10. As shown in FIG. 2, the power supply circuit 60 is covered by a circuit cover 61 mounted on the appliance body 10.

[Effects, etc.] Next, the function and effect of the lighting fixture 1 according to this embodiment will be described.

In the lighting fixture 1 of the present embodiment, when it is mounted on a mounted portion such as the ceiling 2, the fixture body 10 is grounded. At this time, if there is no insulating sheet 30 and both the light source module 20 and the appliance body 10 are in contact, as described above, the AC voltage between the light source module 20 and the appliance body 10 will be The combined voltage to ground generates a stray capacitance, and leakage current may flow to the light source module 20 so that the light source module 20 may emit light weakly.

On the other hand, the light source module 20 and the body 10 of the lighting fixture 1 of this embodiment are separated. Specifically, the substrate 21 of the light source module 20 is separated from the appliance body 10.

As a result, stray capacitance between the light source module 20 and the appliance body 10 can be suppressed, so that leakage current from the light source module 20 can be suppressed. Therefore, even when the appliance body 10 is grounded, the light emission of the light source module 20 can be suppressed.

In particular, the lighting fixture 1 of the present embodiment is capable of suppressing weak light emission of the light source module 20 when the fixture body 10 is grounded even if no weak light emission measures are applied to the light source module 20 itself. Therefore, since there is no need to separately prepare a light source module 20 with weak light emission countermeasures, that is, a capacitor and the like connected in parallel to the light emitting element 22 are embedded in the light source module 20, the generalization of the light source module 20 can be easily achieved.

In addition, in the lighting fixture 1 of the present embodiment, the insulating sheet 30 is arranged between the substrate 21 of the light source module 20 and the fixture body 10 so that both the substrate 21 and the fixture body 10 are separated.

Thereby, both the substrate 21 and the device body 10 can be easily separated. In addition, by sandwiching the insulating sheet 30 with a constant thickness between the substrate 21 and the appliance body 10, the area between the substrate 21 and the appliance body 10 with the insulating sheet 30 inserted can be separated at a certain interval .

In addition, the insulating sheet 30 can be easily placed on or removed from the appliance body 10. That is, the insulating sheet 30 can be easily attached and detached. Thus, the light emission of the light source module 20 can be easily suppressed according to whether the appliance body 10 is connected to the ground. That is, on the one hand, when the appliance body 10 is grounded, it is sufficient to insert the insulating sheet 30 between the light source module 20 and the appliance body 10 as in the present embodiment, on the other hand, the appliance body 10 is not When performing the ground connection, the light source module 20 and the fixture body 10 are both in contact without using the insulating sheet 30 to constitute a lighting fixture. As described above, by forming a structure in which both the substrate 21 and the device body 10 are separated by the insulating sheet 30, the device body 10 can still be used in the device body 10 even if weak light emission countermeasures such as embedding capacitors in the light source module 20 are not applied In the case of ground connection, the light emission of the light source module 20 is simply suppressed.

In addition, the thicker the thickness (thickness of the sheet) of the insulating sheet 30 interposed between the light source module 20 and the appliance body 10, the more stray capacitance can be suppressed and the weak light emission of the light source module 20 can be reduced Level (weak luminous level). However, as shown in FIG. 5, when the thickness of the insulating sheet 30 exceeds 1 mm, the faint light emission level hardly becomes small, and the effect of suppressing the faint light emission of the light source module 20 reaches the limit.

Moreover, although the thickness of the insulating sheet 30 is increased, the weak emission of the light source module 20 can be suppressed, but on the other hand, as shown in FIG. 5, as the thickness of the insulating sheet 30 becomes thicker, the thickness of the insulating sheet 30 The thermal resistance becomes larger. That is, when the thickness of the insulating sheet 30 is increased, the heat generated by the light source module 20 becomes difficult to be conducted to the appliance body 10, and the light output of the light source module 20 is reduced due to the heat generated by itself when it is lit. Worry.

Based on the above analysis, the thickness of the insulating sheet 30 is recommended to be set below 1 mm. Therefore, the distance between the substrate 21 of the light source module 20 and the appliance body 10 according to the thickness of the insulating sheet 30 is recommended to be 1 mm or less.

In particular, the thickness of the insulating sheet 30 is recommended to be set below 0.5 mm. That is, the distance between the substrate 21 of the light source module 20 and the appliance body 10 according to the thickness of the insulating sheet 30 is recommended to be set to 0.5 mm or less. In this way, the weak light emission of the light source module 20 can be suppressed, and the thermal resistance of the insulating sheet 30 can also be effectively prevented from increasing. That is, both the suppression of the weak light emission of the light source module 20 and the suppression of the reduction of the heat dissipation of the light source module 20 can be taken into consideration.

(Modification) The lighting apparatus according to the present invention has been described above according to the embodiment of the present invention, but the present invention is not limited to the above embodiment.

For example, in the above embodiment, an insulating sheet 30 is inserted between the light source module 20 and the appliance body 10, but it is not limited thereto. For example, a plurality of insulating sheets 30 may be repeatedly inserted between the light source module 20 and the appliance body 10.

In the above-described embodiment, the insulating sheet 30 is an integral member, but it is not limited thereto. For example, the insulating sheet 30 may be divided into plural parts. At this time, the plurality of insulating sheets 30 may be distributed over the entire area between the light source module 20 and the appliance body 10, or may be discretely arranged between the light source module 20 and the appliance body 10.

In the above embodiment, the insulating sheet 30 is sandwiched between the light source module 20 and the appliance body 10 to separate the light source module 20 and the appliance body 10, but it is not limited thereto. For example, as shown in FIG. 6, the protrusion 13 may be provided on the device body 10 to separate the light source module 20 and the device body 10. In addition, the protrusion 13 and the apparatus body 10 may be separated. At this time, the protrusion 13 functions as a spacer for separating both the light source module 20 and the device body 10.

In addition, in the above-described embodiment, only the insulating sheet 30 is inserted between the light source module 20 and the appliance body 10 to separate the light source module 20 and the appliance body 10, but it is not limited thereto. For example, by repeatedly arranging the insulating sheet 30 and the spacing member between the light source module 20 and the appliance body 10, the light source module 20 and the appliance body 10 may be separated.

In the above embodiment, the appliance body 10 is made of sheet metal, but it is not limited thereto. For example, the device body 10 may be made by die casting. In addition, the appliance body 10 is not limited to metal as long as it has conductivity so that it can be grounded.

In the above-described embodiment, the light source module 20 and the power circuit 60 are separately configured. However, it is not limited to this, and the light source module 20 and the power circuit 60 may be integrally configured. In this case, it is only necessary to embed the light emitting element 22 on the substrate 21 and embed the circuit elements constituting the power supply circuit 60. That is, it is also possible to use a power source integrated light source module.

In the above-described embodiment, the light-emitting element 22 is an SMD type LED element, but it is not limited to this. For example, a COB (Chip On Board) type light source module formed by directly embedding (preliminarily mounting) the LED chip on the substrate 21 by using the LED chip (bare chip) itself as the light emitting element 22 . At this time, a plurality of LED chips embedded on the substrate 21 may be sealed in batches using a sealing member, or may be sealed individually. In addition, the sealing member may contain a wavelength conversion material such as yellow phosphor as described above.

In the above embodiment, the light-emitting element 22 is designed as a B-Y type white LED light source that emits white light through the blue LED chip and the yellow phosphor, but it is not limited thereto. For example, a phosphor-containing resin containing red phosphor and green phosphor may be used, and it may be possible to emit white light by combining it with a blue LED chip. In addition, in order to improve color rendering properties, it is possible to mix red phosphor or green phosphor in addition to yellow phosphor. In addition, an LED chip emitting a color other than blue can be used, and for example, an ultraviolet LED chip that emits ultraviolet rays having a shorter wavelength than the blue light emitted by the blue LED chip, and is mainly excited by ultraviolet rays The blue phosphor, green phosphor and red phosphor which emit blue light, red light and green light may emit white light.

In the above-described embodiment, LEDs are exemplified as the light source of the light-emitting element 22, but semiconductor light-emitting elements such as laser diodes, and other solid light-emitting elements such as organic EL (Electro Luminescence) or inorganic EL may be used.

In addition, in the above-described embodiment, the ceiling lamp is exemplified as the lighting fixture 1, but it is not limited thereto. For example, the lighting fixture 1 may be a lighting fixture other than a ceiling lamp as long as it has an appliance body that is connected to the ground when it is installed at a predetermined place as a mounted portion. For example, the lighting fixture 1 may be a downlight or the like.

In addition, those who have ordinary knowledge in the technical field of the invention can implement various modifications of the above-mentioned embodiment, or can arbitrarily combine any of the above-mentioned embodiments without departing from the technical idea of the present invention. Aspects completed by constituent elements and functions are also included in the present invention.

1‧‧‧Lighting appliances 2‧‧‧ Ceiling (installed part) 2a‧‧‧Suspended ceiling lamp holder main body 10‧‧‧Appliance body (base) 11‧‧‧Projection 11a‧‧‧Configuration surface 12‧‧‧Opening 13‧‧‧Protrusion 20‧‧‧Light source module (lighting device) 21‧‧‧ substrate 21a‧‧‧The first side 21b‧‧‧Second side 22‧‧‧Lighting element 30‧‧‧Insulation sheet 40‧‧‧Light source cover 41‧‧‧Lens Department 50‧‧‧Transparent cover 60‧‧‧Power circuit 61‧‧‧ circuit cover 70‧‧‧Supporting member 80‧‧‧Adapter

[Figure 1] This is an external view of the lighting appliance according to the implementation. [Figure 2] is an exploded perspective view of a lighting fixture according to an implementation aspect. [FIG. 3] It is a half cross-sectional view when the lighting fixture according to the embodiment is installed on the ceiling. [Fig. 4] is a partially enlarged cross-sectional view of a lighting fixture according to an implementation aspect. Fig. 5 is a diagram showing the relationship between the thickness of the insulating sheet and the weak light emission level and the thermal resistance in the lighting fixture according to the implementation. [Fig. 6] A partially enlarged cross-sectional view of a lighting fixture according to a modification.

1‧‧‧Lighting appliances

2‧‧‧ Ceiling (installed part)

2a‧‧‧Suspended ceiling lamp holder main body

10‧‧‧Appliance body (base)

11‧‧‧Projection

11a‧‧‧Configuration surface

12‧‧‧Opening

20‧‧‧Light source module (lighting device)

21‧‧‧ substrate

21a‧‧‧The first side

21b‧‧‧Second side

22‧‧‧Lighting element

30‧‧‧Insulation sheet

40‧‧‧Light source cover

50‧‧‧Transparent cover

60‧‧‧Power circuit

70‧‧‧Supporting member

80‧‧‧Adapter

Claims (6)

A lighting appliance installed in the installed part, including: Pedestal; and A light-emitting device arranged on the base; and When the lighting fixture is mounted on the mounted portion, the base is grounded, and the light emitting device and the base are separated from each other. For example, the luminaire in the scope of patent application item 1, where, The light-emitting device has a substrate and a light-emitting element arranged on the substrate; and The substrate and the base are separated from each other. The lighting appliance as claimed in item 2 of the patent scope further includes: an insulating sheet disposed between the substrate and the base. If the lighting equipment of patent application item 2 or 3, wherein, The distance between the base and the substrate is less than 1mm. If the lighting equipment of patent application item 2 or 3, wherein, The distance between the base and the substrate is 0.5mm or less. If any one of the items 1 to 3 of the patent application scope, the lighting appliance further includes: The adapter is connected to the power supply part installed in the installed part; and The base is connected to the ground through the adapter by being installed on the adapter.

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