JP2013164976A - Illumination device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illumination device which can detect that the connection between a light source and a power supply device is not normal and in which the light source and the power supply device can be separated.SOLUTION: An illumination device of an embodiment comprises: a light source unit including a light source connection end and a light-emitting element; a power supply device including a power supply connection end connected to an external power supply and the light source connection end, a light-source lighting circuit which turns on the light-emitting element, and a control circuit which controls the light-source lighting circuit; and a connection detection circuit which detects the connection state between the light source connection end of the light source unit and the power supply connection end of the power supply unit. The control circuit has a threshold value, compares the threshold value with the detection results of the connection state detection circuit, and controls the light-source lighting circuit on the basis of the comparison results so that the light-emitting element performs prescribed light control.

Description

  Embodiments described herein relate generally to a lighting device.

  In a lighting device in which the light source and the power supply device can be separated, when the light source and the power supply device are connected using an electrical contact such as a connector, heat generation, melting, or There is a risk of fire.

  When determining the connection state of a connector by detecting impedance, for example, when LEDs are connected in series as a light source, it is necessary to consider variations in forward voltage of the LEDs.

  However, in the conventional illumination power supply device and lighting fixture, even if the flash can be suppressed when the connection between the LED load and the illumination power supply device is intermittently disconnected due to vibration, the light source and the power supply device There is a possibility that a change in impedance due to an abnormal connection with the lighting device is detected and the lighting device cannot be appropriately controlled.

JP 2007-234414 A

  The problem to be solved by the present invention is to provide a lighting device capable of detecting that the connection between the light source unit and the power supply device is not normal in the lighting device in which the light source unit and the power supply device can be separated.

  An illumination device according to an embodiment includes a light source unit having a light source connection end and a light emitting element; a power source connection end connected to an external power source and connected to the light source connection end; a light source lighting circuit for lighting the light emitting element; A power supply device having a control circuit for controlling; a connection detection circuit for detecting a connection state between a light source connection end of the light source unit and a power supply connection end of the power supply device; and having a threshold value and a threshold value and connection state detection circuit And a control circuit for controlling the light source lighting circuit so that the light emitting element performs predetermined lighting control based on the comparison result.

  ADVANTAGE OF THE INVENTION According to this invention, in the illuminating device which can isolate | separate a light source part and a power supply device, it can detect that the connection of a light source part and a power supply device is not normal.

It is a perspective view which shows the illuminating device which concerns on a 1st Example. It is a perspective view which shows the back side of the same illuminating device. It is a top view which shows the back side of the same illuminating device. It is a perspective view which decomposes | disassembles and shows the light source part of the illumination device. FIG. 4 is a cross-sectional view taken along line YY in FIG. 3 in the illumination device. It is an enlarged view which shows the A section of FIG. 5 in the same illuminating device. It is sectional drawing which shows the state which attached the attachment member of the illumination device to the ceiling surface. It is sectional drawing which shows the state by which the light source part was supported by the attachment member of the same illuminating device. It is a top view which removes the spreading | diffusion cover and light-guide plate of the same illuminating device, and is seen from the front side. It is a perspective view which shows the arrangement | positioning relationship of the electric wire derived | led-out from the light source part of the same illuminating device, and the light source connection end was connected. It is a block diagram which shows the circuit structure of the illumination device. It is a top view which removes and shows the front frame and diffusion cover of the illuminating device. It is explanatory drawing which shows the lighting circuit of the power supply device of the illumination device. It is a flowchart which shows the circuit operation | movement of the power supply device of the illumination device.

  (First embodiment)

The illumination device according to the first embodiment includes a light source unit having a light source connection end and a light emitting element; a power source connection end connected to the external light source and connected to the light source connection end; A power supply device having a circuit and a control circuit for controlling the light source lighting circuit; and a connection detection circuit for detecting a connection state between the light source connection end of the light source unit and the power supply connection end of the power supply device. The light source lighting circuit is controlled such that the threshold value is compared with the detection result of the connection state detection circuit, and the light emitting element performs predetermined lighting control based on the comparison result.
(Second Embodiment)

The illumination device of the second embodiment is the illumination device of the first embodiment, wherein the connection detection circuit detects a resistance value between the light source connection end of the light source unit and the power supply connection end of the power supply device. And
(Third embodiment)

The lighting device of the third embodiment is the lighting device of the first or second embodiment. The control circuit has a threshold value, compares the threshold value with the detection result of the connection state detection circuit, and emits light based on the comparison result. The light source lighting circuit is controlled so that the element is turned off or the light output is reduced.
(Fourth embodiment)

  The illumination device according to the fourth embodiment is the illumination device according to any one of the first to third embodiments, wherein the light source unit is connected to the light emitting element connection end connected to the light emitting element and the light emitting element connection end. The connection detection circuit is connected between the connection detection circuit connection end and the light source connection end, and is provided in the light source unit.

  Hereinafter, an illumination device according to an embodiment will be described with reference to the drawings.

  The illuminating device of this embodiment is a type used by being attached to a hanging sealing body as a wiring fixture installed on the device attachment surface, and for example, illuminates a room using a light guide plate.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. In the figure, the wiring connection relationship such as electric wires may be omitted. In addition, the same code | symbol is attached | subjected to the same part and the overlapping description is abbreviate | omitted.

  As shown in FIGS. 1 to 5, 7, 8, and 11, the illumination device 1000 basically includes two members, that is, a mounting member 1 and a light source unit 2. The attachment member 1 is provided with a power supply device 3, an adapter guide as the attachment portion 4, an indirect light source portion 5, and an auxiliary component unit 6 provided with a plurality of electrical auxiliary components. The light source unit 2 includes a light emitting unit 7, a light guide plate 8, a frame member 9, and a diffusion cover 10.

  Furthermore, the illumination device 1000 includes an infrared remote control transmitter that controls the lighting state of the adapter A and the light source unit 2 that are electrically and mechanically connected to the hanging ceiling body Cb installed on the ceiling surface C as the device mounting surface. Rc is provided. Such an illuminating device 1000 is formed in a substantially square appearance, and the front side is a light irradiation surface and the back side is a mounting surface to the ceiling surface C. These components will be described sequentially.

  The attachment member 1 is an apparatus main body formed in a substantially rectangular flat plate shape from a metal material such as a cold rolled steel plate. Specifically, it is a chassis, and a substantially circular opening 11 in which a hooking sealing body Cb installed on the ceiling surface C and a mounting portion 4 to be described later facing the adapter A are arranged is formed in a substantially central portion. Has been.

  Further, a locking bracket 12 bent in a key shape is attached to a substantially central portion on one side of the attachment member 1 facing in the longitudinal direction by a fixing means such as a screw. On the other hand, a pair of mounting brackets 13 that are bent in a substantially L shape and extend to the front side are similarly attached to the corners at both ends on the other side by fixing means such as screws.

  As representatively shown in FIG. 5, the power supply device 3 includes a circuit board and circuit components such as a control IC, a transformer, and a capacitor mounted on the circuit board. The circuit board is formed in a plate shape so as to surround the center portion, and circuit components are mounted on the surface side thereof.

  The circuit board is electrically connected to the adapter A side, and is connected to a commercial AC power source via the adapter A. Therefore, the power supply device 3 receives this AC power supply, generates a DC output, supplies the DC output to the light emitting unit 7 via the electric wire, and controls the light emitting unit 7 to be turned on.

  For this reason, on the front side of the mounting member 1, a power connection end Cn3 is disposed as a connection end for connection to the power supply device 3 as shown in FIG. 5, FIG. 7, FIG. 9, and FIG. The power connection end Cn3 has a substantially box-like outer shape, and a connection port P is formed as a connection portion on one side surface side.

  More specifically, the connection port P has a concave shape, and a light source connection end Cn2 as a connection end for connecting to the light source unit 2 is inserted and can be electrically connected. The connection port P is directed in a direction substantially orthogonal to the front side direction, that is, in a substantially horizontal direction, and is disposed in an inward direction.

  Such a power supply device 3 is attached to and covered with the power supply device cover 35 and disposed on the back side of the attachment member 1 as shown in FIG. 2 and FIG. In this case, the circuit board is attached with the circuit components facing the front side (the lower side in the drawing). In addition, you may make it mount components with comparatively small height dimensions, such as a switching element and a surface mounting component, on the back surface side of a circuit board.

  The power supply device cover 35 is formed in a substantially rectangular short cylinder shape by a metal material such as a cold rolled steel plate, and the side wall 35a is inclined so as to expand toward the front surface side. An opening 35c is formed at the center. The power supply device cover 35 is mounted with a front flange mounted on the mounting member 1 and screwed.

  An elastic member 36 is attached to the back side of the power supply device cover 35. The elastic member 36 is a metal spring member made of a material such as stainless steel, and is attached corresponding to each side of the power supply device cover 35, and extends to the back side so that the pair of distal ends expand. ing.

  The elastic member 36 is a member disposed so as to be interposed with elastic deformation between the lighting device 1000 and the ceiling surface C in a state where the lighting device 1000 is mounted on the ceiling surface C as the device mounting surface. 1000 is securely held on the ceiling surface C.

  The attachment portion 4 is an adapter guide, a member through which the adapter A is inserted and engaged, and a member for attaching the lighting device 1000 to the ceiling surface C. As shown in FIGS. 2, 3 and 5, the adapter guide is formed in a substantially cylindrical shape, and a circular engagement port 41 through which the adapter A is inserted and engaged is provided at the center. Yes. The adapter guide is disposed corresponding to the opening 11 formed in the substantially central portion of the mounting member 1.

  Note that the attachment portion 4 is not necessarily a member referred to as an adapter guide or the like. For example, it may be an opening formed in a chassis or the like, and means a member or a portion that is opposed to the hooking sealing body Cb as a wiring device and to which the adapter A is engaged. In short, it is a member or part for attaching the lighting device 1000 to the ceiling surface C.

  The indirect light source unit 5 is disposed on the back side of the mounting member 1 and mainly has a function of illuminating the ceiling surface C brightly. As shown in FIGS. 2 to 5, a plurality of indirect light source parts 5 are arranged around the attachment part 4, and a substrate 51 and a plurality of light emitting elements 52 mounted on the substrate 51 are provided. And. The substrate 51 is formed in a substantially rectangular flat plate, and the light emitting elements 52 are mounted in a line along the longitudinal direction of the substrate 51.

  Substrates 51 on which the light emitting elements 52 are mounted are attached to four locations on the side wall 35 a of the power supply device cover 35. In this case, the power supply device cover 35 is formed in a substantially rectangular shape, and the substrate 51 is attached to a straight flat surface on the side wall 35a, so that the attachment is stably performed.

  Moreover, since the side wall 35a which forms the attachment part of the board | substrate 51 is formed in the inclined shape which expands toward the front side, the board | substrate 51 will be turned to diagonally upward, ie, the ceiling surface C direction, and light emission is carried out. The light emitted from the element 52 is effectively irradiated toward the ceiling surface C direction.

  Furthermore, each indirect light source unit 5 is covered with a translucent cover 53 formed in an inclined shape such that the cross section expands toward the back side. For this reason, in a state where the lighting device 1000 is attached to the ceiling surface C, when the side portion of the lighting device 1000 is viewed from below, it is difficult to visually recognize the elastic member 36 attached to the back side of the power supply device cover 35. It becomes possible.

  The light emitting element 52 is an LED, which is a surface-mount type LED package, and has an emission color of a light bulb color (L). The light emitting element 52 is connected to the power supply device 3 and controlled to be lit.

  The auxiliary component unit 6 is disposed in the central portion on the other side of the mounting member 1. The auxiliary component unit 6 includes a unit board and a plurality of electrical auxiliary parts mounted on the board in a horizontally long box-like case. The electrical auxiliary components in the present embodiment are the remote control signal receiver 104, the light sensor 105 that detects the brightness of the illumination space in which the illumination device 1000 is installed, the light nightlight, the channel setting switch, and the like.

  Next, the light source unit 2 includes a light emitting unit 7, a light guide plate 8, a frame member 9, and a diffusion cover 10.

  The light emitting unit 7 includes a substrate 71 and light emitting elements 72N and 72L mounted on the substrate 71, as shown in FIGS.

  As representatively shown in FIG. 4, the substrate 71 is formed in a horizontally long rectangular shape and is made of a flat plate of glass epoxy resin (FR-4) as an insulating material, and is formed of a copper foil on the surface side. A wiring pattern is applied. Further, a resist layer is appropriately laminated on the wiring pattern. The material of the substrate 71 can be a ceramic material or a synthetic resin material when an insulating material is used. Furthermore, when it is made of metal, a metal base substrate in which an insulating layer is laminated on one surface of a base plate having good thermal conductivity such as aluminum and excellent heat dissipation may be applied.

  The light emitting elements 72N and 72L are LEDs, which are surface mount type LED packages. A plurality of the LED packages are mounted and arranged in a straight line along the longitudinal direction of the substrate 71. The LED package is roughly composed of an LED chip disposed in a cavity formed of ceramics or synthetic resin, and a translucent resin for molding such as epoxy resin or silicone resin that seals the LED chip. It is configured.

  For the light emitting elements 72L and 72N, light emission colors of light bulb color (L) and daylight color (D) are used, so-called white ones are used, which are alternately arranged along the longitudinal direction. Are arranged in a straight line. The LED chip is an LED chip that emits blue light. In the translucent resin, a phosphor is mixed, and in order to be able to emit white light of light bulb color (L) and daylight color (D), the light-transmitting resin has a complementary color relationship mainly with blue light. Yellow phosphors that emit yellow light and red phosphors are used to supplement reddish components. The so-called white includes daylight color (D), daylight white (N), white (W), light bulb color (L), and the like.

  In addition, LED may be made to mount an LED chip directly on the board | substrate 71, and you may make it mount a bullet-type LED, and a mounting system and a format are not exceptionally limited.

  The board | substrate 71 of such a light emission part 7 is attached to the attachment board 73 as a heat radiating member. The mounting plate 73 is made of a material having good heat conduction, such as aluminum or galvanized steel plate, and is horizontally long and has a substantially C-shaped channel shape. The board 71 is attached to the inner wall of the mounting plate 73 by screwing or the like so that the back side thereof is in close contact. Therefore, the light emitting elements 72N and 72L are thermally coupled to the mounting plate 73 via the substrate 71, and the light emitting unit 7 is unitized by mounting the substrate 71 on the mounting plate 73.

  In the present embodiment, as shown mainly in FIG. 4, four unitized light emitting sections 7 are used, and are arranged corresponding to each side of the light guide plate 8. The unitized light emitting sections 7 are electrically connected by a connector. The unitized light-emitting portions 7 may be disposed on two opposite sides of the light guide plate 8 and can be appropriately selected according to the design.

  The mounting plate 73 as such a heat radiating member is disposed outside the mounting member 1 so as to be exposed to the outside, as representatively shown in FIGS. That is, each mounting plate 73 is disposed in a square shape so as to surround the mounting member 1 with the mounting member 1 facing inward.

  Further, as shown in FIGS. 2, 3, 5, 9, and 10, a light source connection end Cn2 as a connection end of the light source unit 2 led out by an electric wire is provided from one end of the light emitting unit 7. ing.

  Specifically, the light source connection end Cn2 is electrically connected to the light emitting elements 72N and 72L via the substrate 71 in the light emitting unit 7, and in other words, near the corner of the mounting member 1 having a quadrangular shape, The light guide plate 8 is led out from the vicinity of the corner of the rectangular light guide plate 8 in the direction along the inner side in the longitudinal direction of the mounting member 1 by electric wires. The light source connection end Cn2 is formed in a substantially rectangular parallelepiped shape and includes an insertion portion protruding forward. The insertion portion is a portion that is inserted into the connection port P of the power supply connection end Cn3, and electrical connection is made by inserting the light source connection end Cn2 into the power supply connection end Cn3.

  In the relationship with the light source connection end Cn2, the power supply connection end Cn3 is disposed such that the connection port P of the power supply connection end Cn3 is directed in a direction not facing the direction in which the light source connection end Cn2 is derived. . In other words, the connection port P of the power supply connection end Cn3 is arranged so as not to face the derivation direction of the light source connection end Cn2 but to be away from it.

  With such a configuration, in a state where the light source connection end Cn2 is connected to the power supply connection end Cn3, the portion of the electric wire at the light source connection end Cn2 that is a predetermined length from the lead-out end is along the inside of the mounting member 1, and thereafter the power supply connection end. A diverted form is formed which is oriented to wind around Cn3. Therefore, the long electric wire is accommodated and held in the apparatus without inadvertently protruding.

  A connection detection circuit 100 is provided near the corner of the mounting member 1. The connection detection circuit 100 has a function of detecting the connection state between the light source connection end Cn2 and the power supply connection end Cn3 and stopping the supply of power to the light emitting unit 7 when the connection is incomplete.

  The connection detection circuit 100 includes a circuit board 101 and a voltage detection resistor R2 as a circuit component mounted on the circuit board 101, and is covered and accommodated in a metal box-like case. Furthermore, it is electrically connected between the light emitting unit 7 and the light source connection end Cn2 or the power supply connection end Cn3.

  As described above, since the connection detection circuit 100 is disposed in the vicinity of the corner portion of the mounting member 1 and the light source connection end Cn2 is led out from the vicinity of the corner portion by the electric wire, an effect of simplifying the wiring can be expected.

  A locking metal fitting 75 bent in a key shape is attached to the center of the opposite side of the mounting plate 73 by a fixing means such as a screw. On the other hand, a pair of attachment fittings 76 are attached to the other side of the attachment plate 73 by fixing means such as screws (see FIG. 4).

  Such locking metal fittings 75 and mounting metal fittings 76 are disposed so as to face the locking metal fittings 12 and the mounting metal fittings 13 provided on the mounting member 1 described above, and will be described in detail later. It is locked and fixed to the receiving metal 12 and the mounting metal 13.

  In the present embodiment, the locking receiving bracket 12 and the mounting bracket 13, the locking bracket 75 and the mounting bracket 76 constitute a locking and coupling means between the mounting member 1 and the light source unit 2.

  The light guide plate 8 is formed in a polygonal shape using a material having high transmittance such as acrylic resin. Specifically, it is formed in a rectangular flat plate shape, and a dot pattern consisting of a large number of white reflective dots that diffuse light is formed on the entire back side by printing and a reflective sheet is provided. Further, a diffusion sheet is provided on the entire front side. In addition, the side end surfaces of each side of the rectangular shape that is the outer peripheral portion of the light guide plate 8 function as a light incident end surface 81 in which light emitted from the light emitting elements 72N and 72L is incident and travels in the light guide plate 8. It has become.

  On the light incident end face 81 of the light guide plate 8, the substrate 71 of the light emitting unit 7 is disposed. That is, as shown mainly in FIG. 6, a plurality of light emitting elements 72N and 72L are arranged in a straight line on the substrate 71 so that light is incident on the light incident end face 81 of the light guide plate 8. . Further, the light guide plate 8 covers the front surface side of the mounting member 1 including the mounting portion 4.

  The frame member 9 is a member that constitutes the outer peripheral portion of the light source unit 2, and includes an outer frame 91, a front frame 92, and a translucent frame 93. The outer frame 91 is made of a synthetic resin material such as ABS resin or polycarbonate, and has a side wall that rises and has a substantially square frame shape. The front frame 92 is made of a synthetic resin material exhibiting white color, and is formed in a substantially square frame shape in a plate shape.

  Similarly, the translucent frame 93 is formed in a substantially square frame shape by a translucent material such as acrylic resin. As shown in FIG. 6, the outer frame 91 and the front frame 9 Between the two. The translucent frame 93 has a function of guiding light emitted from the light guide plate 8 to brighten the side of the light source unit 2. These frame members 9 are attached to the mounting plate 73 side by mounting brackets whose detailed configuration is omitted.

  The diffusion cover 10 is formed in a substantially square shape by performing a diffusion process on a light-transmitting material such as an acrylic resin, and is disposed so as to cover the front side of the light guide plate 8.

  As shown in FIGS. 5, 6, and 12, a diffusion member 85 is disposed on the front peripheral side (light irradiation surface side) of the light guide plate 8 and on the outer peripheral edge. . The diffusing member 85 has a substantially triangular cross section and an elongated shape, and is formed by performing a diffusion treatment on a light-transmitting material such as an acrylic resin. By disposing the diffusing member 85 at the outer peripheral edge of the light guide plate 8, it is possible to suppress luminance unevenness and color unevenness that are likely to occur in the light incident end surface 81 of the light guide plate 8.

  More specifically, as shown mainly in FIGS. 6 and 12, a plurality of light emitting elements 72 </ b> N and 72 </ b> L are mounted and arranged in a straight line alternately along the longitudinal direction of the substrate 71. Light emitted from the light emitting elements 72N and 72L enters the light guide plate 8 from the incident end face 81 of the light guide plate 8.

  At this time, as indicated by arrows in FIG. 12, the light emitted from the light emitting elements 72N and 72L has strong directivity, so that the light emitted from the adjacent light emitting elements 72N and 72L is not near the incident end face 81. This causes a phenomenon that the spread is narrow and light mixing is difficult to be performed. For this reason, brightness unevenness and color unevenness may occur in the vicinity of the incident end face 81 of the light guide plate 8.

  In the first embodiment, by disposing the diffusing member 85 in the vicinity of the incident end surface 81 of the light guide plate 8, it is possible to reduce luminance unevenness and color unevenness in appearance. That is, since the light emitted from the vicinity of the incident end surface 81 of the light guide plate 8 is diffused by the diffusion member 85, the luminance unevenness and the color unevenness can be reduced and uniformized. In this case, it is possible to avoid a reduction in the light emitting area in the light guide plate 8.

  Furthermore, since the diffusing member 85 has an inclined surface 85a that expands in the light irradiation direction and is formed in a substantially triangular shape, the inclined surface 85a can ensure natural continuity of luminance. .

  As shown in FIG. 5, the adapter A is electrically and mechanically connected to a hooking sealing body Cb installed on the ceiling surface C by a hooking blade provided on the upper surface side, and has a substantially cylindrical shape. A pair of locking portions A1 are provided on both sides of the peripheral wall so as to always protrude toward the outer peripheral side by a built-in spring. The locking portion A1 is immersed by operating a lever provided on the lower surface side.

  As shown in FIG. 7, a power cord connected to the power supply device 3 is led out from the adapter A, and a power connector Cn1 is connected to the distal end portion thereof. The power connector Cn1 is connected to a power supply connector Cn0 provided on the power supply device 3 side (see FIGS. 9 and 10).

  The infrared remote control transmitter Rc transmits, for example, a specific coded infrared remote control signal in the form of a pulse with a frequency of 38 kHz, and is provided with an all-lighting button, a dimming lighting button, a nightlight button, an off button, and the like. ing. By operating the remote control transmitter Rc toward the auxiliary component unit 6, that is, the remote control signal receiving unit 104, the light emitting states of the light emitting elements 72N and 72L in the light emitting unit 7, that is, all-light lighting, dimming lighting, extinguishing, etc. Can be controlled.

  In the illumination device 1000 configured as described above, the mounting plate 73 as a heat radiating member is disposed outside the mounting member 1 and exposed to the outside. Therefore, the attachment plate 73 comes into contact with the outside air without being covered by the attachment member 1, and the attachment plate 73 is cooled mainly by convection, and the heat dissipation effect can be enhanced. In addition, since the attachment member 1 is formed in a small size, the weight can be reduced.

  In this case, the mounting plate 73 may not be configured to be exposed over the entire circumference, or may be a case where it is partially exposed. That is, the case where a part of the attachment plate 73 is covered with the attachment member 1 is allowed. The light incident end face 81 of the light guide plate 8 is positioned to face the light emitting elements 72N and 72L so that light emitted from the light emitting elements 72N and 72L is incident thereon.

  Next, a procedure for attaching the lighting device 1000 configured as described above to the ceiling surface C will be described with reference to FIGS. 5, 7, and 8.

  First, as shown in FIG. 7, the hanging ceiling body Cb is installed on the ceiling surface C. The adapter A is electrically and mechanically connected to the hooking sealing body Cb.

  In this state, the attachment member 1 side is attached to the adapter A as shown in the figure. Specifically, the engaging member 41 is engaged until the engaging portion 41 of the adapter A is securely engaged with the engaging port 41 of the adapter guide while the engaging port 41 of the adapter guide as the attaching portion 4 in the attaching member 1 is aligned with the adapter A. 1 is pushed up from below by hand to perform the mounting operation. In this state, the power connector Cn1 led out from the adapter A is connected to the power supply connector Cn0 on the power supply device 3 side.

  Next, the light source unit 2 side is attached to the mounting member 1. As shown in FIG. 8, the metal fitting 75 provided on the light source unit 2 side is hooked on the metal fitting 12 on the attachment member 1 side to support the light source unit 2, and the attachment member 1 side and the light source unit 2 are supported. The light source unit 2 is supported in a suspended state by connecting the sides with a chain Ch. The chain Ch has a function of preventing the light source unit 2 from dropping and improving safety.

  Thereafter, the light source connection end Cn2 led out from one end of the light emitting unit 7 is connected to the power supply connection end Cn3 on the power supply device 3 side disposed on the front surface side of the mounting member 1. In this case, since the light source connection end Cn2 is led out from the light emitting unit 7 with a sufficient length by an electric wire, connection work to the power supply connection end Cn3 on the power supply device 3 side becomes easy and the light source connection end Cn2 or The tension applied to the electric wire can be reduced. As described above, the attachment member 1 side and the light source unit 2 side are electrically connected to and separated from each other by the light source connection end Cn2 and the power supply connection end Cn3.

  Subsequently, the light source unit 2 is rotated about the locking metal fitting 75 side as a fulcrum, and is closed so as to cover the front side of the mounting member 1. In this state, the light source unit 2 is attached to the mounting member 1 by mounting screws S that pass through the through holes of the mounting bracket 13 provided in the mounting member 1 and are screwed into the screw holes of the mounting bracket 76 provided on the light source unit 2 side. It is securely attached to the front side of the. This state is an attachment completion state (refer FIG. 5).

  In the mounted state of the illumination device 1000, the adapter A is inserted through the opening 35c of the power supply device cover 35, and the locking portion A1 of the adapter A is locked to the engagement port 41 of the adapter guide, and is provided on the back side of the power supply device cover 35. The elastic member 36 is elastically deformed and is interposed between the back side of the power supply device cover 35 and the ceiling surface C in a compressed state. Therefore, the illumination device 1000 is firmly engaged with the adapter A, and the attached state is stably maintained.

  When removing the illumination device 1000, schematically, the mounting screw S is removed, the light source unit 2 is rotated in the opening direction with the locking metal fitting 75 side as a fulcrum, and then the light source unit 2 is mounted on the mounting member. 1 is removed, and the front side of the mounting member 1 is opened. And the attachment member 1 can be removed by operating the lever provided in the adapter A and releasing engagement of the latching | locking part A1 of the adapter A. FIG. As described above, the light source unit 2 is attached to the front side of the mounting member 1 so as to be openable and detachable.

  In the mounting state of the illumination device 1000 as described above, the electric wire at the light source connection end Cn2 is accommodated and held in the device without inadvertently protruding, and the wiring process can be performed smoothly.

  Further, the power supply device 3 is disposed on the mounting member 1 side. For this reason, the weight on the side of the light source unit 2 coupled to the mounting member 1 is reduced, and the load applied to the locking bracket 12 and the mounting bracket 13, the locking bracket 75 and the mounting bracket 76 constituting the locking coupling means is reduced. Reduced and advantageous in strength.

  Further, in the mounting state of the lighting device 1000 as described above, the power supply device 3 is disposed on the mounting member 1 side. For this reason, the weight on the side of the light source unit 2 coupled to the mounting member 1 is reduced, and the load applied to the locking bracket 12 and the mounting bracket 13, the locking bracket 75 and the mounting bracket 76 constituting the locking coupling means is reduced. Reduced and advantageous in strength.

  For example, when the power is supplied to the power supply device 3 by operating the infrared remote control transmitter Rc in the mounted state of the illumination device 1000, the light emitting elements 72N and 72L are energized through the substrate 71, and the light emitting elements 72N and 72L are energized. Is controlled by the power supply device 3. The light emitted from the light emitting elements 72N and 72L is incident on the light incident end face 61 of the light guide plate 8. The incident light is totally reflected in the light guide plate 8 and spreads over the entire light guide plate 8, and on the back side. Light that is reflected and diffused by a dot pattern or a reflective sheet formed from the formed reflective dots, and further diffused and homogenized by the diffusion cover 10 is emitted from the front side.

  The light guide plate 8 covers the front side of the attachment member 1 including the attachment portion 4. That is, the light guide plate 8 is not formed with a central opening for enabling the adapter A to be operated. For this reason, it is possible to make the luminance of the light emitting surface uniform without generating a dark portion at the center of the light guide plate 8, realize a good light distribution state, and improve the feeling of brightness.

  Since the diffusing member 85 is disposed in the vicinity of the incident end face 81 of the light guide plate 8, it is possible to reduce luminance unevenness and color unevenness in the vicinity of the incident end face 81 in appearance.

  In addition, the light emitted from the light guide plate 8 is directly emitted from the diffusion cover 10 to the front side, is diffused by the diffusion member 85, and is emitted to the front side. On the other hand, a part of the light diffused by the diffusing member 85 is guided to the translucent frame 93 and irradiated from the translucent frame 93 mainly to the side of the light source unit 2. For this reason, the area of the light emitting surface on the front surface side can be enlarged, and the feeling of brightness can be improved.

  Further, the light guide plate 8 covers the front side of the attachment member 1 including the attachment portion 4. That is, the light guide plate 8 is not formed with a central opening for enabling the adapter A to be operated. For this reason, it is possible to make the luminance of the light emitting surface uniform without generating a dark portion at the center of the light guide plate 8, realize a good light distribution state, and improve the feeling of brightness.

  If an opening is formed in the central portion of the light guide plate 8, the opening is a portion where light is not guided, and this portion becomes dark and a phenomenon occurs in which the central portion becomes a dark portion.

  In addition, when the indirect light source unit 5 is energized, each light emitting element 52 is turned on, and light emitted obliquely upward from the light emitting element 52 is transmitted through the translucent cover 53 and from around the mounting unit 4. The ceiling surface is mainly irradiated so as to be emitted. Therefore, the ceiling surface becomes bright and the feeling of brightness in the space can be improved.

  When the light emitting elements 72N and 72L in the light emitting unit 7 are turned on, heat is generated from the light emitting elements 72N and 72L. The heat generated from each of the light emitting elements 72N and 72L is conducted and dissipated mainly from the back surface side of the substrate 71 to the mounting plate 73 which is a heat radiating member. In this case, the mounting plate 73 is disposed outside the mounting member 1 so as to be exposed to the outside, so that it is easily cooled by the outside air and is effectively radiated.

  Next, the circuit configuration and operation of the power supply device 3 of the lighting apparatus 1000 according to the first embodiment will be described.

  A circuit configuration of the power supply device 3 of the illumination device 1000 according to the first embodiment of the present invention will be described with reference to the drawings. FIG. 11 is a configuration diagram illustrating a circuit configuration of the power supply device 3 of the illumination device 1000 according to the first embodiment. FIG. 13 illustrates the white light source lighting circuit 107, the light bulb color light source lighting circuit 108, and the indirect light source lighting circuit 109 according to the first embodiment. It is a circuit diagram. Moreover, the same code | symbol is attached | subjected to the same part and the overlapping description is abbreviate | omitted.

  The power supply device 3 according to the first embodiment of the present invention includes a power supply circuit 100, a control circuit power supply circuit 103, a remote control signal receiver 104, a light sensor 105, a white light source lighting circuit 107, a light bulb color light source lighting circuit 108, and an indirect light source lighting. A circuit 109 and a control circuit 112 are included.

  The power supply circuit 100 is connected to an external power supply via the switch SW, the hooking sealing body Cb, the power supply connector Cn1, and the power supply connector Cn0. When the external power supply is an AC power supply, the AC power is converted into DC power. More specifically, the switch SW is a wall switch or the like provided on a building wall or the like. The power supply circuit 100 has a general circuit configuration including a rectifier using a diode and a smoothing capacitor connected in parallel to the rectifier on the output side of the rectifier. The power supply circuit 100 includes a power factor correction circuit 102a, and the power factor correction circuit 102a has a general circuit configuration.

  To the power supply circuit 100, a control circuit power supply circuit 103, a white light source lighting circuit 107, a light bulb color light source lighting circuit 108, and an indirect light source lighting circuit 109 are connected. The control circuit power supply circuit 103, the white light source lighting circuit 107, the light bulb color light source lighting circuit 108, and the indirect light source lighting circuit 109 are each supplied with DC power from the power supply circuit 100. The control circuit power supply circuit 103 supplies power to a control circuit 112 described later.

  For example, the white light source lighting circuit 107 is excited by blue light having a correlated color temperature of about 4600 to 7100 K, a peak wavelength of 440 to 470 nm and a half width of 10 to 30 nm, and has a peak wavelength of 500 to 600 nm and a half width of 100 to 200 nm. A light emitting element 72N that emits light is connected. The light emitting element 72N is turned on by the white light source lighting circuit 107.

  The bulb color light source lighting circuit 108 is excited by blue light having a correlated color temperature of about 2500 to 3200 K, a peak wavelength of 440 to 470 nm, and a half value width of 10 to 30 nm, and has a peak wavelength of 550 to 650 nm and a half value width of 100 to 200 nm. A light emitting element 72L that emits light bulb color light is connected. The light emitting element 72L is turned on by the light bulb color light source lighting circuit 108.

  The indirect light source lighting circuit 109 is excited by blue light having a correlated color temperature of about 2500 to 3200 K, a peak wavelength of 440 to 470 nm, and a half width of 10 to 30 nm, and has a peak wavelength of 550 to 650 nm and a half width of 100 to 200 nm. A light emitting element 52 that emits light bulb color light is connected. The light emitting element 52 is turned on by the indirect light source lighting circuit 109.

  The color temperatures of the light emitting elements 72N, 72L, and 52 may be obtained from a single light source, or the light emitted from a plurality of light sources having different chromaticities may be obtained by additive mixing. When a predetermined color temperature is obtained using a plurality of light sources, the type may be either the same type or a combination of different types. In addition, since the number of the light emitting elements 72N, 72L, and 52 is not particularly limited, one or any of a plurality of light emitting elements can be appropriately used. And the number of each light emitting element 72N, 72L, 52 may be equal, and does not need to be equal. The light emitting elements 72N and 72L constitute the light emitting part 7, and the light emitting element 52 constitutes the indirect light source part 5.

  Specific circuit systems of the white light source lighting circuit 107, the light bulb color light source lighting circuit 108, and the indirect light source lighting circuit 109 are not particularly limited in the present embodiment. For example, as shown in FIG. A suitable circuit can be employed. In this embodiment, since the light emitting elements 52, 72N and 72L are used, the white light source lighting circuit 107, the light bulb color light source lighting circuit 108, and the indirect light source lighting circuit 109 can use a direct current lighting system. Specifically, it is possible to adopt a circuit configuration that performs constant current control of a DC-DC converter, for example, a step-down chopper. This circuit configuration has advantages such as high circuit efficiency and easy control.

  For example, the white light source lighting circuit 107, the light bulb color light source lighting circuit 108, and the indirect light source lighting circuit 109 in FIG. 11 have a circuit configuration for constant current control of the step-down chopper, as shown in FIG. A series circuit of the elements Q is connected between the output terminals of the power supply circuit 100, and an increasing current that linearly increases from the power supply circuit 100 flows when the switching element Q is turned on to accumulate electromagnetic energy in the inductor L. A series part of the diode D and the output capacitor C is connected in parallel to the inductor L to form a closed circuit, and when the switching element Q is turned off, a decreasing current that linearly decreases in the closed circuit flows out from the inductor L. The DC voltage stepped down across the output capacitor C is output by repeating the accumulation and outflow of electromagnetic energy to and from the inductor L described above. Light emitting elements 52, 72N and 72L are connected in parallel to both ends of an output capacitor C which is an output terminal of the step-down chopper.

  In the white light source lighting circuit 107, the light bulb color light source lighting circuit 108, and the indirect light source lighting circuit 109, the increased current flowing through the series circuit of the switching element Q, the inductor L, and the output capacitor C, the inductor L, the output capacitor C, and the diode D are included. Current detection circuits 107a, 108a, and 109a are inserted in series in the circuit portion through which the reduced current of the closed circuit flows, and the current value is detected. Further, the current detection circuits 107a, 108a, and 109a are configured to detect the terminal voltage of the output capacitor C. The detection values of the current detection circuits 107a, 108a, and 109a are input to the control circuit 112, and the control circuit 112 controls the switching element Q based on the detection values input from the current detection circuits 107a, 108a, and 109a. The control circuit 112 is supplied with power by the control circuit power supply circuit 103.

  Further, in order to detect output voltages of the white light source lighting circuit 107, the light bulb color light source lighting circuit 108, and the indirect light source lighting circuit 109, voltage detection circuits 107b, 108b, and 109b are connected in parallel to the output capacitor C, respectively. The detection values of the voltage detection circuits 107b, 108b, and 109b are input to the control circuit 112, and the control circuit 112 controls the switching element Q based on the detection values input from the voltage detection circuits 107b, 108b, and 109b.

  The control circuit 112 performs dimming control on the light source unit 2 and the indirect light source unit 5 based on a signal transmitted from a remote control signal light receiving unit 104 or an optical sensor 105 described later. Further, by changing the ratio of the light output of the light emitting elements 72N and 72L having different light emission colors of the light source unit 2, the light source color of the light source unit 2 can be changed, that is, the color matching control can be performed. The light control and the color control include both the light control or the color control in which the brightness or the light source color continuously changes, and the light control or the color control in which the step changes. It means that the light control or the color control can be performed so as to give an impression that the brightness or the light source color continuously changes. Further, the control circuit 112 changes the color temperature of the light source color of the light source unit 2 to a desired value based on the signal from the remote control transmitter Rc, or continuously changes the color temperature of the light source color of the light source unit 2. When the desired light color is obtained, the change can be stopped and selected. Furthermore, the control circuit 112 may synchronize each lighting circuit and perform dimming control or toning control, or may perform dimming control or toning control asynchronously.

  The white light source lighting circuits 107, 108a, and 109a are configured to perform a dimming operation using a continuous current with amplitude control and a dimming operation using a PWM current with PWM control. In this embodiment, control is performed using the current value detected by the detection circuit 107a in the case of amplitude control, and control is performed using the current value detected by the detection circuit 107a in the case of PWM control. Do.

  The control circuit 112 operates with power supplied from the control circuit power supply circuit 103. The control circuit 112 generates a white light source based on the current value and the applied voltage value flowing in the light emitting elements 52, 72N and 72L detected by the white light source lighting circuit 107, the light bulb color light source lighting circuit 108, and the indirect light source lighting circuit 109. By sending control signals to the lighting circuit 107, the bulb color light source lighting circuit 108, and the indirect light source lighting circuit 109, the white light source lighting circuit 107, the bulb color light source lighting circuit 108, and the indirect light source lighting circuit 109 are controlled to be lit. . The control circuit 112 is connected so as to be able to receive signals from the remote control signal light receiving unit 104 and the optical sensor 105. The remote control signal light receiving unit 104 receives a signal transmitted by operating the remote control transmitter Rc and transmits a signal based on the received signal to the control circuit 112. In the first embodiment, infrared rays are used as a medium for communication between the remote control transmitter Rc and the remote control signal light receiving unit 104. However, various known media such as radio waves can be used as communication media, and wired communication is also possible. It does not matter. The optical sensor 105 detects the illuminance of the illumination space in which the illumination device 1000 is installed, and sends a signal based on the detected value to the control circuit 112.

  By operating the remote control transmitter Rc or operating the switch SW provided on the wall surface, the lighting control of the desired light source unit 2 and indirect light source unit 5 can be performed. The remote control transmitter Rc includes, for example, an all-light lighting switch, a light output increase switch, a light output decrease switch, a light-off switch, and a light source unit 2 by light emitting elements 72N and 72L in order to perform lighting control of the light source unit 2 indirect light source unit 5. Color temperature increase switches and color temperature decrease switches for the light source colors can be provided.

  Operation | movement of the power supply device 3 of the illuminating device 1000 of Example 1 is demonstrated.

  The operation of the power supply device 3 of the illumination device 1000 according to the first embodiment of the present invention will be described with reference to FIGS. 11, 13, and 14. Moreover, the same code | symbol is attached | subjected to the same part and the overlapping description is abbreviate | omitted.

  As shown in FIG. 11, a power supply connection terminal Cn3 is provided on the output side of the power supply device 3. The light source unit 2 is provided with a light source connection end Cn2 that is electrically connected to the power supply connection end. A connection detection circuit 100 for detecting the connection state of the light source unit 2 and the power supply device 3 is connected to the light source connection end Cn2. A connection detection circuit connection terminal Cn5 is connected to the opposite side of the connection detection circuit 100 to which the light source connection terminal Cn2 is connected. The light emitting element connection terminal Cn4 is electrically connected to the connection detection circuit connection terminal Cn5. Light emitting elements 72N and 72L are connected to the light emitting element connection end Cn4. Power is supplied to the light emitting elements 72N and 72L from the power supply device 3 through the power supply connection terminal Cn3, the light source connection terminal Cn2, the connection detection circuit 100, the connection detection circuit connection terminal Cn5, and the light emission element connection terminal Cn4 in this order.

  The voltage detection circuits 107b, 108b and 109b are provided with a resistor R1 for detecting a voltage. The connection detection circuit 100 is provided with a resistor R2 for detecting a voltage. Voltage detection circuits 107b and 108b detect the voltage value (VF) applied to light emitting elements 72N and 72L by resistors R1 and R2.

  The connection state between the light source connection terminal Cn2 and the power supply connection terminal Cn3 is detected and determined by detecting the voltage value (VF) by the voltage detection circuits 107b and 108b. When the connection state between the light source connection end Cn2 and the power supply connection end Cn3 is not normal, the resistance value ΔR between the light source connection end Cn2 and the power supply connection end Cn3 changes. Since the voltage value (VF) fluctuates when the resistance value ΔR changes, the connection state between the light source connection terminal Cn2 and the power supply connection terminal Cn3 is detected and determined by detecting the fluctuation of the voltage value (VF).

  The determination as to whether or not the connection state between the light source connection terminal Cn2 and the power supply connection terminal Cn3 is normal is made by comparing the voltage value (VF) detected by the voltage detection circuits 107b and 108b with a fixed threshold value. Alternatively, the threshold value determined by sampling and averaging the detected voltage value (VF) may be compared with the voltage value (VF) detected by the voltage detection circuits 107b and 108b. . Further, it may be performed based on the fluctuation range based on the increase / decrease of the voltage value (VF) detected by the voltage detection circuits 107b and 108b, and the amount of change per unit time.

  Next, the operation of the power supply device 3 will be described in more detail with reference to FIG.

  When a switch SW (see FIG. 11) provided between the external power source and the illumination device 1000 is operated to start supplying power from the external power source to the power source device 3 (step S1 in FIG. 14), the white light source lighting circuit 107 is activated. The voltage value (VF) is detected by the voltage detection circuits 107b and 108b provided in the light bulb color light source lighting circuit 108, respectively. The control circuit 112 compares the voltage value (VF) detected by the voltage detection circuits 107b and 108b with the attachment detection threshold value, and determines whether or not the light source unit 2 is connected to the power supply device 3, that is, the power supply connection terminal Cn3. It is determined whether or not the light source connection end Cn2 is connected (step S2 in FIG. 14). The wearing detection threshold value is between a voltage value (VF) when the light source unit 2 is normally connected to the power supply device 3 and a voltage value (VF) when the light source unit 2 is not connected to the power supply device 3. The voltage value is determined. The wearing detection threshold value may be a fixed threshold value or a threshold value determined by sampling and averaging the detected voltage value (VF).

  When it is determined in step S2 that the light source unit 2 is connected to the power supply device 3, the power supply device 3 starts operation, that is, the switching elements of the white light source lighting circuit 107 and the light bulb color light source lighting circuit 108. Q starts a switching operation (step S3 in FIG. 14). On the other hand, when it is determined that the light source unit 2 is not connected to the power supply device 3, the power supply device 3 does not start operation (step S4 in FIG. 14). The operation in step S4 is continued while the switch SW is turned on, that is, continued until the switch SW is turned off.

  When the operation of the power supply device 3 is started in step S3, the voltage value (VF) is detected by the voltage detection circuits 107b and 108b provided in the white light source lighting circuit 107 and the light bulb color light source lighting circuit 108, respectively. The control circuit 112 compares the voltage value (VF) detected by the voltage detection circuits 107b and 108b with the connection detection threshold, and determines whether or not the light source unit 2 and the power supply device 3 are normally connected, that is, power connection It is determined whether or not the end Cn3 and the light source connection end Cn2 are normally connected (step S6 in FIG. 14). The determination as to whether or not the connection state between the light source connection terminal Cn2 and the power supply connection terminal Cn3 is normal is made by comparing the voltage value (VF) detected by the voltage detection circuits 107b and 108b with a fixed threshold value. Alternatively, the threshold value determined by sampling and averaging the detected voltage value (VF) may be compared with the voltage value (VF) detected by the voltage detection circuits 107b and 108b. .

  If it is determined in step S6 that the connection state between the light source unit 2 and the power supply device 3 is normal, the power supply device 3 continues to operate, that is, the white light source lighting circuit 107 and the switching element of the light bulb color light source lighting circuit 108. Q continues the switching operation (step S7 in FIG. 14). On the other hand, when it is determined that the connection state between the light source unit 2 and the power supply device 3 is abnormal, the power supply device 3 stops operating (step S8 in FIG. 14). The operation in step S8 is continued while the switch SW is turned on, that is, continued until the switch SW is turned off.

  The effects of the illumination device of Example 1 are shown below.

  According to the illumination device 1000 of the first embodiment, whether or not the light source unit 2 and the power source device 3 are normally connected, that is, whether or not the power source connection end Cn3 and the light source connection end Cn2 are normally connected. Since the connection detection circuit 100 is detected, the output can be stopped when the connection between the light source unit 2 and the power supply device 3 is in an abnormal state.

  According to the illumination device 1000 of the first embodiment, since the output can be stopped when the connection between the light source unit 2 and the power supply device 3 is in an abnormal state, the electrical connection between the power supply connection end Cn3 and the light source connection end Cn2 The generation of heat generation, melting, ignition, etc. at the power connection end Cn3 and the light source connection end Cn2 due to abnormal contact can be reduced.

  According to the lighting apparatus 1000 of the first embodiment, it is possible to reduce the generation of heat generation, melting, ignition, and the like at the power connection end Cn3 and the light source connection end Cn2, and thus the safety of the lighting apparatus 1000 can be improved.

  According to the illumination device 1000 of the first embodiment, it is possible to smoothly perform the wiring process without causing the wires to protrude carelessly.

  According to the illuminating device 1000 of the first embodiment, since the diffusing member 85 is disposed in the vicinity of the incident end face 81 of the light guide plate 8, it is possible to reduce luminance unevenness and color unevenness in the vicinity of the incident end face 81 in appearance. It becomes possible. In addition, in Example 1, although the case where the power supply device 3 was arrange | positioned at the attachment member 1 side was demonstrated, it does not prevent disposing the power supply device 3 at the light source part 2 side.

According to the illuminating device 1000 of Example 1, it becomes possible to provide the illuminating device which can suppress effectively the temperature rise of the light emitting elements 72N and 72L.
A modification of the first embodiment will be described below.

  The illumination device 1000 includes a light source unit 2 having a light emitting element connection end Cn4 and light emitting elements 72N and 72L, a white light source lighting circuit 107 for lighting the power supply connection end Cn3 and the light emitting elements 72N and 72L, a light bulb color light source lighting circuit 108, A power supply device 3 having a white light source lighting circuit 107 and a control circuit 112 for controlling the light bulb color light source lighting circuit 108, a light source connection terminal Cn2 connected to the power supply connection terminal Cn3, and a connection detection circuit connection connected to the light emitting element connection terminal Cn4 The lighting system may include a connection detection circuit 100 having a terminal Cn5 and detecting a connection state between the light source connection terminal Cn2 and the power supply connection terminal Cn3. In this case, the control circuit 112 may be connected to the connection detection circuit 100. When the detection result changes, the white light source lighting circuit 107, the light bulb color light source lighting circuit 1 so that the light emitting elements 72N and 72L perform predetermined lighting control. To control 8. In this illumination system, the connection detection circuit 100 may be provided in the light source unit 2 or in the power supply device 3. Further, the connection detection circuit 100 may be provided separately from the light source unit 2 and the power supply device 3.

  In the illumination system, the light source unit 2 having different numbers and characteristics of the light emitting elements 72N and 72L can be connected to the power supply device 3. Therefore, when the light source unit 2 breaks down or when the user wants to replace the light source unit 2, the light source unit 2 can be replaced without complicated operations.

  The illumination system can replace the connection detection circuit 100 in accordance with the connection detection threshold or the attachment detection threshold that changes when the light source unit 2 is replaced. Therefore, when the connection detection threshold value or the attachment detection threshold value is stored in the control circuit 112, it is not necessary to rewrite the data of those threshold values in the control circuit 112. Further, even when the connection detection circuit 100 fails, the lighting system can easily replace the connection detection circuit 100.

  In the light source unit 2, the light emitting elements 72N and 72L and the connection detection circuit may be connected via the connection detection circuit connection end Cn5 and the light emission element connection end Cn4, or may be directly connected.

  Note that, for example, a temperature detection element may be used to detect heat generation at the connection portion and detect the connection state between the light source connection terminal Cn2 and the power supply connection terminal Cn3. It is not limited to those. When the connection between the light source connection terminal Cn2 and the power supply connection terminal Cn3 is performed in an incomplete state, there is a problem that heat is generated at the connection part. However, when a temperature detection element is used, the connection part generates heat. It can be avoided and safety can be ensured.

  In the lighting device 1000 of the first embodiment, a hinge structure may be applied as the locking and coupling means, and the light source unit 2 may be attached to the front side of the attachment member 1 so as to be openable and closable. Further, for example, the light source unit 2 may be detachable from the mounting member 1 by providing clamp metal fittings on opposite sides of the outer frame. Also in this case, the front side of the mounting member 1 can be opened and closed by the light source unit 2. Thus, various structures can be applied to the locking and coupling means, and the locking and coupling means is not limited to a specific one.

  In the lighting device 1000 of the first embodiment, the case where the light guide plate formed in a square shape is used and the light emitting surface is formed in a substantially square shape has been described. For example, the light guide plate is formed in a hexagonal shape, an octagonal shape, or the like. A light emitting element is arranged corresponding to each side, the front frame is formed in a circular shape, and the light emitting surface of the light guide plate is exposed in a circular shape to form a circular light emitting surface. It can also be configured to be.

  Moreover, although the illuminating device 1000 of Example 1 is suitable for the illuminating device which performs illumination using a light-guide plate, it is not restricted to this. It is applicable also to the illuminating device which does not use a light-guide plate. Furthermore, the light source is suitable when a light emitting element such as an LED is used, but is not particularly limited. A fluorescent lamp or the like may be used.

  Although several embodiments of the present invention have been described, these embodiments or examples are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments or examples can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments or examples and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

2 ... Light source unit 3 ... Power supply device Cn2 ... Light source connection end Cn3 ... Power supply connection end 72N, 72L ... Light emitting element (LED)
DESCRIPTION OF SYMBOLS 100 ... Connection detection means 107, 108, 109 ... Light source lighting circuit 112 ... Control circuit 1000 ... Illumination device

Claims (4)

A light source section having a light source connection end and a light emitting element;
A power supply device connected to an external power supply and having a power supply connection end connected to the light source connection end, a light source lighting circuit for lighting the light emitting element, and a control circuit for controlling the light source lighting circuit;
A connection detection circuit for detecting a connection state between the light source connection end of the light source unit and the power supply connection end of the power supply device;
Comprising
The control circuit has a threshold value, compares the threshold value and the detection result of the connection state detection circuit, and controls the light source lighting circuit so that the light emitting element performs predetermined lighting control based on the comparison result. .   The lighting device according to claim 1, wherein the connection detection circuit detects a resistance value between a light source connection end of the light source unit and a power supply connection end of the power supply device.   The control circuit has a threshold value, compares the threshold value with a detection result of the connection state detection circuit, and controls the light source lighting circuit based on the comparison result so that the light emitting element is turned off or the light output is reduced. The lighting device according to claim 1. The light source
A light emitting element connection end connected to the light emitting element;
A connection detection circuit connection end connected to the light emitting element connection end,
4. The illumination device according to claim 1, wherein the connection detection circuit is connected between the connection detection circuit connection end and the light source connection end and is provided in the light source unit.

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