JP2012174528A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device capable of emitting light in different directions in a simple structure in the lighting device for emitting light in the different directions by using a plurality of solid light emitting elements.SOLUTION: In the lighting device, a plurality of LED elements 13a, 14a are arranged on a light leading-out section made of the plurality of LED elements 13a, 14a (light-emitting sections 13, 14) so as to make respective light leading-out directions become a zero angle (substantially parallel) which is less than a right angle, and an upper cover section 15a as an optical divergence means wherein the leading-out light from a part of the LED element 13a between the plurality of LED elements 13a, 14a is diverged in a direction different from the leading-out light from the other LED element 14a is provided.

Description

  The present invention relates to a lighting device using a plurality of solid state light emitting elements.

2. Description of the Related Art Conventionally, there is known a lighting device that irradiates light in a plurality of directions by providing a plurality of solid light emitting elements such as LED (Light Emitting Diode) elements (for example, see Patent Document 1).
In the illumination device of Patent Document 1, a light emitting unit including a solid light emitting element that irradiates light downward in the apparatus main body, and a solid light emitting element that irradiates light upward in the apparatus main body having a 180-degree irradiation direction different from the light emitting part. And a light emitting unit including

JP 2009-231028 A

  By the way, in the illumination device using a plurality of light emitting elements as described above, when irradiating light in different directions, a light emitting unit is provided for each direction. The direction of the light emitting part (solid light emitting element) must be changed. For this reason, since there exists a possibility that versatility may become low as an illuminating device, development of the illuminating device which can irradiate light in a different direction with a simpler structure is desired.

  The present invention has been made to solve the above-described problems, and its object is to irradiate light in different directions with a simple configuration in a lighting device that irradiates light in different directions with a plurality of solid state light emitting elements. It is to provide a possible lighting device.

  In order to solve the above-described problem, an illumination device according to the present invention is an illumination device in which light is derived from a light deriving unit including a plurality of solid state light emitting elements and light is branched in a plurality of directions. The plurality of solid-state light emitting elements are arranged in a range in which the respective light derivation directions are less than a right angle, and the light emitted from some of the solid-state light-emitting elements is transmitted from other solid-state light-emitting elements. Optical branching means for branching in a direction different from the derived light is provided.

In the above structure, it is preferable that the plurality of solid state light emitting devices be disposed on the same substrate.
In the above configuration, it is preferable that a direction-specific control unit that independently controls the plurality of solid state light emitting elements for each branch direction is provided.

  In the above configuration, the above is preferable. The plurality of solid-state light-emitting elements are composed of a plurality of types of solid-state light-emitting elements, and each of the solid-state light-emitting elements includes a type-specific control unit that controls each type of solid-state light-emitting element independently.

In the above configuration, the optical branching unit is preferably configured by a reflecting unit that reflects the derived light from the solid state light emitting device.
In the above configuration, the reflecting means is preferably a reflective shade.

In the above configuration, the reflecting means is preferably configured to reflect the light derived from some of the plurality of solid state light emitting devices in the opposite direction.
In the above configuration, the optical branching unit is preferably a light guide lens.

  Further, in the above configuration, it is preferable that one of the derived light from the solid state light emitting device is irradiated downward by the optical branching unit and the other is irradiated upward including a horizontal plane.

  In the above configuration, it is preferable that the light emitted from the solid light emitting element branched by the optical branching unit is transmitted downward through the transmission cover member positioned below the solid light emitting element.

  ADVANTAGE OF THE INVENTION According to this invention, the illuminating device which can irradiate light in a different direction with a simple structure can be provided in the illuminating device which irradiates light in a different direction with a some solid light emitting element.

It is sectional drawing for demonstrating schematic structure of the illuminating device in this embodiment. It is a block diagram for demonstrating the electric constitution of the illuminating device in the same as the above. It is sectional drawing for demonstrating schematic structure of the illuminating device in another example. (A) is a perspective view of the illuminating device in another example, (b) is a front view of the illuminating device in another example. It is sectional drawing for demonstrating schematic structure of the illuminating device in another example. (A) is a front view of the illuminating device in another example, (b) is a principal part enlarged view of the illuminating device in another example. (A) is a perspective view of the illuminating device in another example, (b) is sectional drawing of the illuminating device in another example. It is sectional drawing for demonstrating schematic structure of the illuminating device in another example.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
As shown in FIG. 1, the illuminating device 10 of this embodiment is installed in the ceiling T by attaching the apparatus main body 10a to the hooking ceiling 11 installed in the ceiling T via an adapter (not shown). This is a so-called ceiling light.

  In the illumination device 10, a plurality of light emitting units 13 and 14 are electrically connected on a circuit board CB assembled to the side surface of the device body 10 a. Moreover, the illuminating device 10 is provided with the cover part 15 which covers the device main body 10a and the said light emission parts 13 and 14 substantially the whole.

  The circuit board CB is arranged in the vertical direction of the lighting device 10 along the plate surface of the board CB. Further, the upper half of the circuit board CB is located outside the cover portion 15. The lower half of the device body 10a is assembled to the side surface of the apparatus main body 10a so that the lower half is located in the cover portion 15.

  The plurality of light emitting units 13 and 14 include LED (Light Emitting Diode) elements 13a and 14a and lenses 13b and 14b that cover the light emitting surfaces of the LED elements 13a and 14a. Further, the LED elements 13a and 14a are arranged on the same circuit board CB to form one unit (single light extraction unit). One LED element 13a of the LED elements 13a and 14a is provided at a position approximately half above the circuit board CB located outside the cover portion 15. On the other hand, one LED element 14a of the LED elements 13a and 14a is provided at a substantially half position on the lower side of the circuit board CB located in the cover portion 15.

  The LED elements 13a and 14a are arranged on the outer surface of the circuit board CB so that the light irradiation direction is directed outward (horizontal direction) from the center side of the lighting device 10. At this time, the angle formed by the light derived from each of the LED elements 13a and 14a is less than a right angle (in this embodiment, since it is substantially parallel, it is 0 degrees).

  The LED elements 13a and 14a are electrically connected to a wiring pattern formed on the circuit board CB, and are connected to the wiring power pattern CDa and CDb (see FIG. 2). Electric power is supplied to the LED elements 13a and 14a. As shown in FIG. 2, the control power sources CDa and CDb are configured such that power from a commercial power source (not shown) is controlled within a proper range by a control circuit CP. In addition, the control circuit CP can individually control the LED elements 13a and 14a by the control power sources CDa and CDb.

  As shown in FIG. 1, the cover portion 15 includes a dome-shaped upper cover portion 15a that constitutes a reflecting means, and a dome-shaped lower cover portion 15b that is integrally formed with the opening of the upper cover portion 15a. It is comprised so that a substantially elliptical sphere may be made.

  The upper cover portion 15a located on the ceiling T side has a through hole in the upper bottom portion, and the upper cover portion 15a is attached to a mounted portion (not shown) provided in the apparatus main body 10a so that the cover portion 15 is attached to the device. It is attached to the main body 10a. The upper cover portion 15a is formed of a reflective shade member that reflects light derived from the LED element 14a.

The lower cover portion 15b located below the upper cover portion 15a is configured by a milky white cover member that diffuses light that is transmitted therethrough.
Next, the operation of the illumination device 10 having the above configuration will be described.

  When the power switch (not shown) of the remote controller RC is pushed by the user's operation, the lighting device 10 causes the signal receiver (not shown) of the control circuit CP to transmit the transmission signal of the remote controller RC. Receive. When receiving the transmission signal, the control circuit CP controls the control power supplies CDa and CDb to supply power to the LED elements 13a and 14a. Thereby, each LED element 13a, 14a of the illuminating device 10 is lighted. At this time, the light emitted from one LED element 14a of each LED element 13a, 14a is reflected by the upper cover portion 15a made of the reflection shade of the cover portion 15 and led downward. And this light is diffused in the lower cover part 15b which consists of a milky white cover member, and irradiates light below the illuminating device 10. FIG. On the other hand, the light from the LED element 13a located on the upper side outside the upper cover portion 15a (cover portion 15) is irradiated in the ceiling T surface direction (substantially horizontal direction).

Next, characteristic effects of the present embodiment will be described.
(1) A plurality of LED elements 13a are arranged in a light deriving unit composed of a plurality of LED elements 13a and 14a (light emitting units 13 and 14) so that each light deriving direction is less than a right angle of 0 degrees (substantially parallel). , 14a are arranged. And the upper cover part 15a as an optical branching means for branching the light derived from some of the LED elements 13a, 14a in a direction different from the light derived from the other LED elements 14a is provided. Prepare. With such a configuration, it is possible to irradiate light in different directions with a simple configuration in the illumination device 10 that irradiates light in different directions with the LED elements 13a and 14a as a plurality of solid state light emitting elements. Become.

(2) Since the plurality of LED elements 13a and 14a are arranged on the same substrate CB, the number of substrates CB can be suppressed, that is, the number of components can be suppressed.
(3) A control circuit CP is provided as a direction-specific control unit that controls the plurality of LED elements 13a and 14a independently for each branch direction. By adopting such a configuration, different control can be performed for each branch direction, and thus diversity as the lighting device 10 can be increased.

  (4) The optical branching unit includes the upper cover portion 15a that reflects light derived from the LED element 13a. The upper cover portion 15a is formed of a reflective shade member. With such a configuration, branching can be performed with a relatively simple configuration of light reflection.

  (5) One of the derived lights from the LED elements 13a and 14a is irradiated downward by the upper cover portion 15a as an optical branching unit. The other is irradiated upward including a horizontal plane. By adopting such a configuration, it can be used as a room light on the user's visual work surface or the like by light irradiating the lower side in the vertical direction, and can be used as ambient lighting by light irradiating the horizontal direction and the ceiling T side. it can.

  (6) Derived light of the LED element 13a branched by the upper cover part 15a is transmitted through the lower cover part 15b as a transmissive cover member positioned below the LED element 13a and irradiated downward. With such a configuration, the light of the LED element 13a can be transmitted and diffused by the lower cover portion 15b.

In addition, you may change embodiment of this invention as follows.
In the above-described embodiment, the LED elements 13a and 14a constituting the light-emitting portions 13 and 14 are arranged so that the light derivation direction is directed from the center side of the cover portion 15 to the outside. However, the present invention is not limited thereto. . For example, as shown in FIG. 3, you may employ | adopt the structure which provides each LED element 13a, 14a so that it may go to the center side from the outer side of the cover part 21. FIG. In the illuminating device 20 of FIG. 3, the circuit board CB is disposed on the inner side surface on the radially outer side of the cover portion 21, and a plurality of LED elements 13 a, 14a is arranged. The light of the LED element 13a on the lower side in the vertical direction on the circuit board CB is irradiated on the lower surface 21a of the cover portion 21 and diffused when transmitted. Further, the light of the LED element 13a that is on the upper side in the vertical direction on the circuit board CB is irradiated to the reflection plate 22 side provided on the apparatus main body 10a outside the cover portion 21. The reflecting plate 22 is configured to reflect light toward the center of the cover portion 21 radially outward (substantially in the horizontal direction).

In the above embodiment, the present invention is applied to the ceiling light type lighting device 10, but the present invention may be applied to other lighting devices as described below.
You may apply to the illuminating devices 30 and 50 for street lights or crime prevention lights as shown to Fig.4 (a) (b) and Fig.6 (a) (b).

  4 (a) and 4 (b), a light emitting unit 31b is provided on an upper portion of a columnar support 31a provided on the installation surface. The light emitting unit 31b includes a circuit board CB, a plurality of LED elements 32 and 33, and a reflection member 36 that reflects light from the LED elements 32 and 33. The circuit board CB is directly or indirectly installed on the upper end surface of the support column 31a so that the plane orthogonal direction of the board CB is the vertical direction. The circuit board CB is placed so that the light from the LED elements 32 and 33 is directed upward in the vertical direction, and the reflection member 36 is provided at the facing position. Further, the light emitting unit 31b covers the circuit board CB and the LED elements 32 and 33 while covering the upper side edge of the support column 31a, and a rectangular cylindrical cover unit 34 whose upper side in the vertical direction is open, and a cover unit 34. And a flat-shaped blocking portion 35 that covers. The cover 34 is made of a transparent polycarbonate resin that transmits the light of the LED elements 32 and 33 and the light reflected by the reflecting member 36. With such a configuration, light is emitted to the outside of the cover portion 34.

  The lighting device 50 shown in FIGS. 6A and 6B includes a column part 51 provided on the installation surface and bent upward substantially L on its upper side, and a light emitting unit 52 provided at the tip of the column part 51. . The light emitting unit 52 includes a COB (Chip On Board) type LED unit LU, and the LED unit is provided with a plurality of LED elements 52a and 52b. A lens 52c is provided to cover each element 52a, 52b of the LED unit LU. The lens 52c is configured to branch light from the elements 52a and 52b.

  You may apply to the hanging type illuminating device 40 as shown in FIG. The illuminating device 40 of FIG. 5 is provided on the hook ceiling 11 installed on the ceiling T via an electric cord 41 connected to the upper side of the apparatus main body 42 via an adapter (not shown). A circuit board CB is provided below the apparatus body 42, and a plurality of LED elements 43a and 44a are provided on the circuit board CB. Then, lenses 43b and 44b are provided at positions corresponding to the light derivation direction (irradiation direction) of the LED elements 43a and 44a. Then, the light from the LED element 43 a is irradiated from a through hole 46 a formed in the approximate center of the lower surface portion 46 of the housing 45 that forms the outer shell of the lighting device 40. On the other hand, the light from the LED element 44 a is reflected by the inner reflection surface of the lower surface portion 46 and the inner reflection surface of the upper surface portion 47 of the housing 45 that forms the outer shell of the lighting device 40, and is irradiated from both left and right sides of the housing 45. It has become so.

  As shown in FIG. 7, the present invention may be applied to a lighting device 60 of a type installed on a wall such as a room. In the illumination device 60 of FIG. 7, a device body 61 having a substantially cubic shape that is long in one direction is installed on a wall of a room or the like (not shown), and light is shielded through support portions 62 provided one by one in the left-right direction of the device body 61. A plate-like shade member 63 is provided. The apparatus main body 61 is provided with a circuit board CB, and a plurality of LED elements 65 and 66 for irradiating light on the shade member 63 side are provided on the circuit board CB. Further, the apparatus main body 61 is provided with a covering portion 67 that covers the outer periphery other than the irradiation surface of the LED elements 65 and 66. A reflecting plate 68 is provided on the inner side surface of the shade member 63 at a position facing the LED elements 65 and 66, and the light from the LED elements 65 and 66 is irradiated to a substantially opposite position by 180 degrees by the reflecting plate 68. It has become so. Here, since the surface 67a on the reflection plate 68 side is a reflection surface of the covering portion 67, the light reflected by the reflection plate 68 enters the surface 67a side again. Light can be reflected to the side. Thereby, it becomes possible to irradiate the light reflected from the reflecting plate 68 and irradiated to the outside of the illumination device 60 with high efficiency.

  In the above embodiment, although not particularly mentioned, a configuration in which a light guide plate 78 and a light guide lens 77 are provided as shown in FIG. 8 may be adopted. The illuminating device 70 shown in FIG. 8 is provided with a cover portion 73 via a hook ceiling 72 provided on the ceiling T. The cover portion 73 is formed in a hollow bottomed cylindrical shape or a bottomed rectangular tube shape. The circuit board CB is provided directly or indirectly on the inner circumferential surface of the cover portion 73, and a plurality of LED elements 75 and 76 are provided on the circuit board CB. Light from the LED element 75 is irradiated toward a light guide lens 77 that guides light to the upper side of the cover portion 73. On the other hand, the light from the LED element 76 is applied to the light guide plate 78 supported by the cover portion 73, and the light applied to the light guide plate 78 is partially transmitted as it is and the rest is reflected. By repeating the process, light is emitted from the lower surface of the light guide plate 78 to emit light.

  In the above embodiment, the plurality of LED elements 13a and 14a are employed as the plurality of solid state light emitting elements, but the plurality of solid state light emitting elements are configured by other solid state light emitting elements such as OLED (Organic light-emitting diode) elements. May be. Moreover, you may comprise a some solid light emitting element by a solid light emitting element from which a kind differs, such as the combination of an LED element and an OLED element.

  In the above embodiment, although not particularly mentioned, the light colors of the light emitting units 13 and 14 including the LED elements 13a and 14a may be different from each other. For example, the light color of the light emitting unit 13 that mainly illuminates the lower side is configured to increase the color temperature such as daylight white or daylight color, and the light color of the light emitting unit 14 that irradiates the ceiling T in the horizontal direction is set to the light bulb color or warm white. A structure having a relatively low color temperature may be used. The light emitting units 13 and 14 may both be turned on or only one of the light emitting units 13 and 14 may be turned on by the user's operation using the remote controller RC, or may be changed as appropriate according to the user's mood. Good.

  Moreover, it is good also as a structure which provides multiple LED element (solid light emitting element) irradiated in the same direction, and the color temperature of each LED element differs. In this case, as described above, a control circuit (type-specific control unit) may be provided for each color to enable independent control. With such a configuration, both the light emitting units 13 and 14 are turned on or only one of the light emitting units 13 and 14 is turned on by the user's operation by the remote controller unit RC, or according to the user's mood. It can be changed as appropriate.

  In the above embodiment, the light emitted from the plurality of LED elements 13a and 14a is arranged on the circuit board CB so as to be in the same direction, but less than 90 degrees emitted from the LED elements 13a and 14a. The present invention may be applied within this range.

  In the above embodiment, the plurality of LED elements 13a and 14a are provided on the same circuit board CB. However, the present invention is not limited to this. For example, as long as the LED elements 13a and 14a are arranged so as to face the same direction, a configuration in which the LED elements 13a and 14a are arranged on different circuit boards on the same plane instead of the same circuit board CB may be adopted. In addition, for example, a configuration in which the irradiation direction (light derivation direction) of each LED element 13a, 14a is set to a range less than a right angle may be adopted that is arranged on a different circuit board.

  10, 20, 30, 40, 50, 60, 70 ... illumination device, 15a ... upper cover (optical branching means and reflecting means and reflecting shade), 22 ... reflecting plate (optical branching means and reflecting means), 36 ... reflecting Members (optical branching means and reflecting means), 46 ... lower surface (optical branching means and reflecting means), 47 ... upper surface (optical branching means and reflecting means), 52c ... lens (optical branching means), 68 ... reflector ( Optical branching means and reflecting means), 77... Light guiding lens (optical branching means and reflecting means).

Claims (10)

An illumination device that irradiates light derived from a light deriving unit composed of a plurality of solid state light emitting elements in a plurality of directions,
The plurality of solid state light emitting elements are disposed in the light deriving portion in a range where each light deriving direction is less than a right angle,
Illumination comprising optical branching means for branching light derived from part of the plurality of solid state light emitting elements in a direction different from light derived from other solid state light emitting elements apparatus. The lighting device according to claim 1.
The lighting device, wherein the plurality of solid state light emitting elements are arranged on the same substrate. The lighting device according to claim 1 or 2,
An illumination device comprising: a direction-specific control unit that independently controls the plurality of solid-state light emitting elements for each branch direction. In the illuminating device as described in any one of Claims 1-3,
The plurality of solid state light emitting devices are composed of a plurality of types of solid state light emitting devices,
An illuminating apparatus comprising a type-specific control unit that independently controls each type of the solid-state light emitting element. In the illuminating device as described in any one of Claims 1-4,
The illuminating device characterized in that the optical branching means is constituted by a reflecting means for reflecting the derived light from the solid state light emitting device. The lighting device according to claim 5.
The illuminating device characterized in that the reflection means is a reflection shade. The lighting device according to claim 5.
The said reflection means is comprised so that the derivation | leading-out light from some solid light emitting elements of these solid state light emitting elements may be reflected in the opposite direction, The lighting device characterized by the above-mentioned. In the illuminating device as described in any one of Claims 1-4,
The illumination device, wherein the optical branching means is a light guide lens. In the illuminating device as described in any one of Claims 1-8,
One of the derived light from the solid state light emitting device is irradiated downward by the optical branching unit, and the other is irradiated upward including a horizontal plane. The lighting device according to claim 9.
The illuminating device according to claim 1, wherein the light emitted from the solid state light emitting device branched by the optical branching unit is transmitted through a transmission cover member positioned below the solid state light emitting device and irradiated downward.

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