JP5692773B2 - Lighting device - Google Patents

Description

  The present invention relates to an illumination device using an organic EL element as a light source.

    An organic EL (Organic Electro-Luminescence) element (hereinafter referred to as “organic EL element”) has a characteristic that the time from voltage application to light emission is very short and excellent in responsiveness, and the responsiveness hardly changes with temperature. Further, the viewing angle is close to 180 degrees. Due to these characteristics, in recent years, organic EL elements have attracted attention as backlight light sources and light sources for spatial illumination of display devices, and illumination devices using organic EL elements as light sources are disclosed in Patent Document 1 and Patent Document 2. Yes.

  Patent Document 1 discloses a lighting device in which two housings that house a surface light emitting device that uses an organic EL element as a light source are rotatably connected to a gripping portion. In the illuminating device disclosed in Patent Document 1, the grip portion can be placed on a placement surface such as a top plate of a desk, and the two housings are fixed to the grip portion (placement surface). It can be held at an angled position.

  Further, in Patent Document 2, a flat light emitting panel having a surface light emitter made of an organic EL element on one surface and a window portion are formed so as to surround an outer portion of the light emitting panel. An illuminating device including a plurality of light emitting units each including a flat frame member that is pivotally supported at a portion is disclosed. In the illuminating device disclosed in Patent Document 2, the opposing end portions of the frame member are connected to each other by a hinge portion so as to be rotatable, and the connection angle between adjacent frame members can be arbitrarily changed. Yes.

JP 2006-147262 A (paragraphs [0010] to [0012], FIG. 1) JP 2009-206030 A (paragraphs [0018] to [0024], FIGS. 1 and 2)

  In the illumination devices disclosed in Patent Document 1 and Patent Document 2, replacement of the light source is not intended. That is, Patent Document 1 does not disclose any attachment structure of the surface light emitting device to the housing, and it is understood that the surface light emitting device is fixed to the housing so as not to be detached. Further, paragraph [0022] of Patent Document 2 states that “the shaft support portion 6 that rotatably supports the light emitting panel 3 on the line connecting the central portions of the opposite sides of the light emitting panel 3 includes the frame member. Therefore, the light emitting unit 1 is formed in a flat plate shape with the light emitting panel 3 inscribed in the rectangular window portion 5 formed in the frame member 4. There is a description. However, the document 2 does not describe at all whether or not the above-mentioned shaft support can be released, and it is understood that the light-emitting panel is pivotally supported by the frame member so as not to be detached. Even if the pivotal support of the light emitting panel with respect to the frame member can be released, the operation is troublesome, and the pivotal support portion may be damaged or deformed during the operation.

  In addition, in the illumination device disclosed in Patent Document 1, in order to irradiate light not only in the front direction but also in an oblique direction, the surface light emitting device and the gripping part are connected via an axial connection part. It is connected so that it can rotate. Specifically, one end of the connection portion is coupled to the side surface of the housing, and the other end is coupled to one end portion of the grip portion (see paragraph [0012] of Patent Document 1). Therefore, the housing and the gripping portion are required to have at least a thickness equal to or larger than the diameter of the connecting portion, or bearing means having a thickness equal to or larger than the diameter of the connecting portion. Therefore, if the diameter of the connecting portion is reduced in order to reduce the thickness of the housing, the gripping portion, the bearing means, etc., the strength of the connecting portion is reduced, and durability and reliability are reduced.

  Further, in the illumination device disclosed in Patent Document 2, in order to irradiate light not only in the front direction but also in an oblique direction, a light-emitting panel and a frame member are provided on the frame member. Are pivotally connected. Therefore, the light emitting panel and the frame member are required to have a thickness greater than the diameter of the shaft support portion, or bearing means having a thickness greater than the diameter of the shaft support portion. Therefore, when the diameter of the shaft support portion is reduced in order to reduce the thickness of the bearing means, the strength of the shaft support portion is lowered, and durability and reliability are lowered.

  As described above, it is impossible or difficult to replace the light source in the conventional lighting device. In addition, the conventional lighting device has not fully met the demand for thinning.

  An object of the present invention is to provide a thin lighting device in which a light source can be easily replaced.

A lighting device in which an organic EL panel is provided on a surface of a main body formed by bending a single metal plate, the main body holding a support portion and a direction extending in a direction crossing the main surface of the support portion a part, a second inclined portion inclined to the first inclined portion, a second direction opposite the previous SL first direction inclined to the first direction crossing the extending direction of the holding portion Each of the first and second inclined portions is a part of the one metal plate and fixedly connected to each other , and the first And each of the second inclined portions has a first surface and a second surface facing away from the first surface, and the organic EL panel includes the first and second surfaces of the holding portion. The at least one of the second inclined portions is detachably provided on at least one of the first and second surfaces. To.

  ADVANTAGE OF THE INVENTION According to this invention, the thin illuminating device which can replace | exchange light sources easily can be provided.

It is a top view which shows an example of embodiment of the illuminating device of this invention, Comprising: (a) is a side view, (b) is a front view, (c) is a rear view, (d) is a top view. It is the top view which expanded and showed a part of illuminating device shown in FIG.

  Hereinafter, an example of an embodiment of a lighting device of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of the lighting device according to the present embodiment. FIG. 2 is an enlarged plan view showing a part of the lighting apparatus according to the present embodiment.

  As shown in FIG. 1, the lighting device according to the present embodiment includes a main body 1 formed by bending a thin metal plate into a desired shape, and a plurality of organic EL panels 2 arranged on the surface of the main body 1. In the following description, the left side of FIG. 1 is distinguished from the front side, and the right side of the page as the back side. Accordingly, FIG. 1B is a front view of the lighting device, and FIG. 1C is a rear view. 1A is a side view of the lighting device, and FIG. 1D is a top view. However, such a distinction is merely a distinction for convenience of explanation.

  The main body 1 includes a support portion 3 and a holding portion 4 that extends while being bent from one side of the support portion 3 in a direction intersecting the main surface of the support portion 3. More specifically, the holding | maintenance part 4 is extended in the said direction, bending to the front side and back side of an illuminating device alternately. In short, the holding part 4 extends in a so-called zigzag. As a result, the holding part 4 has a first inclined part 5a that inclines toward the first direction intersecting with the extending direction (falls to the front side), and a second direction opposite to the first direction. And a second inclined portion 5b that inclines toward the back (falls to the back side).

  As shown in FIG. 1A, in the present embodiment, three first inclined portions 5a and four second inclined portions 5b exist alternately and continuously. And the organic EL panel 2 is arrange | positioned at the front side surface of the 1st inclination part 5a, and the back side surface of the 2nd inclination part 5b, respectively. That is, the organic EL panel 2 is provided on each of the front-side surface of the first inclined portion 5a and the back-side surface of the second inclined portion 5b whose inclination directions are opposite.

  Here, of the three first inclined portions 5a, two have the same area, and the remaining one has an area approximately twice that of the other two. Of the four second inclined portions 5b, three have the same area, and the remaining one has an area approximately twice that of the other three. Of the three first inclined portions 5a, the two first inclined portions 5a each having a relatively small area are each provided with one organic EL panel 2, and the first area having a relatively large area. Two organic EL panels 2 are arranged on the inclined portion 5a. Similarly, among the four second inclined portions 5b, one organic EL panel 2 is disposed on each of the second inclined portions 5b having a relatively small area, and the second inclined portion having a relatively large area. Two organic EL panels 2 are arranged in the part 5b.

  The organic EL panel 2 has the same structure as a conventionally known general organic EL panel. Therefore, only an outline will be described here, and a detailed description thereof will be omitted. The organic EL panel 2 includes at least a light-transmitting substrate and a light emitting unit formed on one surface of the light-transmitting substrate. The light emitting part is composed of a transparent electrode formed on one surface of the translucent substrate, a light emitting layer made of an organic compound laminated on the transparent electrode, and a counter electrode formed on the light emitting layer. . In other words, the light emitting layer is sandwiched between the transparent electrode and the counter electrode. When a voltage is applied to the transparent electrode and the counter electrode, light emission occurs inside the light emitting layer. Part of the generated light passes through the transparent electrode, enters the light-transmitting substrate, and is emitted from the surface of the substrate into the atmosphere. Further, another part of the generated light is reflected by the counter electrode, passes through the transparent electrode, enters the light-transmitting substrate, and is emitted from the surface of the substrate to the atmosphere. In any case, the light generated inside the light emitting layer is emitted into the atmosphere from the surface of the translucent substrate. However, when the light emitting part is configured by laminating the counter electrode, the light emitting layer, and the transparent electrode in this order on the surface of the light transmitting substrate, light is emitted from the surface of the transparent electrode. In any case, the organic EL panel is arranged on the first inclined portion 5a and the second inclined portion 5b so that the surface from which light is emitted faces outward.

  Here, the number and area of the 1st inclination part 5a and the 2nd inclination part 5b are not limited to said number and area. Further, the organic EL panel 2 may be arranged on the back surface of the first inclined part 5a and the front surface of the second inclined part 5b, and the organic EL panel 2 is arranged on both the front side and the back side. May be. Furthermore, you may provide the organic electroluminescent panel 2 only in a part of inclination part.

  Next, the attachment structure of the organic EL panel 2 to each inclined part of the holding part 4 will be described. But the attachment structure of the organic electroluminescent panel 2 with respect to each inclination part is common. Therefore, the attachment structure of the organic EL panel 2 to the first inclined portion 5a located farthest from the support portion 3 in FIGS. 1A to 1C will be described with reference to FIG. The description and illustration of the mounting structure to the unit are omitted.

  As shown in FIG. 2, a rectangular frame 10 made of a synthetic resin or other insulating material is fixed to the front surface of the first inclined portion 5a with screws 11, and the inner surface of the frame 10 A concave portion (accommodating portion 12) capable of accommodating the organic EL panel 2 is formed by the front surface of the one inclined portion 5a.

  Furthermore, at least one side of the frame 10 is provided with a movable stopper 13 that can be moved back and forth in the inside and outside of the housing portion 12 by a rotation operation. A stopper 14 is provided. More specifically, one end of the movable stopper 13 is rotatably supported on one side of the frame 10, and the other end protrudes inside the housing portion 12 and the outside of the housing portion 12. It is possible to displace to the second position retracted by rotating operation. Therefore, after the organic EL panel 2 is accommodated in the accommodating portion 12, the movable stopper 13 is rotated, and the tip of the stopper 13 protrudes inside the accommodating portion 12 (the movable stopper 13 is displaced to the first position). ), One side of the organic EL panel 2 is sandwiched between the movable stopper 13 and the front surface of the first inclined portion 5a, and between the fixed stopper 14 and the front surface of the first inclined portion 5a. The other side of the organic EL panel 2 is sandwiched.

  On the other hand, when the movable stopper 13 is rotated in the direction opposite to the above and the tip of the stopper 13 is retracted to the outside of the accommodating portion 12 (when the movable stopper 13 is displaced to the second position), the clamping is released. Then, the organic EL panel 2 can be taken out from the accommodating portion 12. That is, since the organic EL panel 2 can be attached to and detached from the main body 1, the replacement and maintenance of the organic EL panel 2 are extremely easy.

  Further, since the frame 10 is formed of an insulating material, it is not necessary to subject the frame 10 to an insulating process and the production cost is reduced.

  Note that the frame and the organic EL panel may be integrated by sandwiching the periphery of the organic EL panel with a pair of frames formed of an insulating material. In this case, the unit in which the frame and the organic EL panel are integrated may be detachably fixed to the front surface of the first inclined portion with screws or other fixing means.

  The illuminating device of this embodiment can be self-supporting by the support part 3 (FIG. 1) of the main body 1, and can be used as it is on the floor of a room. Moreover, the support part 3 can be fixed to the ceiling or can be used by being suspended from the ceiling. Furthermore, the support portion 3 can be used while being fixed to the wall surface.

  For example, when the lighting device shown in FIG. 1 is placed on the floor of a room, the light emitted from the organic EL panel 2 provided in the first inclined portion 5a and the second inclined portion 5b is mainly the front and floor. Light is distributed toward the surface. Moreover, if the organic EL panel 2 is disposed on the back side surface of the first inclined part 5a and the front side surface of the second inclined part 5b, the light emitted from the organic EL panel 2 is mainly on the front and ceiling surfaces. Light distribution toward. Furthermore, if the organic EL panel 2 is arranged on both the front side surface and the back side front surface of the first inclined part 5a or the second inclined part 5b, the light emitted from the organic EL panel 2 is emitted from the front and ceiling surfaces. The light is distributed toward the floor. In this manner, light distribution can be performed in a desired direction by changing the arrangement of the organic EL panel 2. As described above, according to the present invention, light can be distributed not only in the front direction but also in an oblique direction without holding the organic EL panel as a light source so as to be rotatable. Therefore, means (such as a shaft or a bearing) for holding the organic EL panel so as to be rotatable is unnecessary, and the apparatus can be easily reduced in thickness. Further, since the number of parts is reduced, the production cost is reduced, and the durability and reliability are improved.

DESCRIPTION OF SYMBOLS 1 Main body 2 Organic EL panel 3 Support part 4 Holding part 5a 1st inclination part 5b 2nd inclination part 10 Frame 11 Screw 12 Storage part 13 Movable stopper 14 Fixed stopper

Claims (3)

A lighting device in which an organic EL panel is provided on the surface of a main body formed by bending a single metal plate,
The body is
A support part;
A holding portion extending in a direction crossing the main surface of the supporting portion, a first inclined portion inclined in a first direction crossing the extending direction of the holding portion, before Symbol first direction And a second inclined portion inclined in a second direction opposite to the first and second inclined portions, each of which is a part of the one metal plate and fixedly connected to each other A holding portion, and
Each of the first and second inclined portions has a first surface and a second surface facing away from the first surface;
The organic EL panel is detachably provided on at least one of the first and second surfaces of at least one of the first and second inclined portions of the holding portion. apparatus.   The lighting device according to claim 1, wherein a plurality of the first inclined portions and the second inclined portions are alternately provided along an extending direction of the holding portion. A housing portion surrounded by a surface of the first inclined portion or the second inclined portion and an inner surface of a frame made of an insulating material provided on the surface;
A stopper that is rotatably provided on at least one side of the frame and that is displaceable to a first position protruding inside the housing portion and a second position retracted outside the housing portion; ,
When the stopper is displaced to the first position, at least one side of the organic EL element accommodated in the accommodating portion is between the stopper and the surface of the first inclined portion or the second inclined portion. The lighting device according to claim 1, wherein the holding is released when the stopper is displaced to the second position.

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