JP2013030496A - Light emitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light emitting device saving energy and having long lifetime.SOLUTION: A light emitting device includes: a surface light emitting body 80 capable of being developed from a housed state to an operating state; and current control means for controlling driving current so as to allow a developed section of the surface light emitting body to emit light. The surface light emitting body 80 is formed such that a plurality of light emitting plates 801 are connected in an accordion-like form, and the current control means has an electrode corresponding to each of the light emitting plates 801. The surface light emitting body 80 is developed by increasing an angle between adjacent light emitting plates 801, and is housed by decreasing the angle. When the angle is equal to a predetermined angle or less, a connection between the electrodes is disconnected, and, when the angle is more than the predetermined angle, the connection between the electrodes is formed. Thereby, the developed section emits light when the surface light emitting body 80 is developed.

Description

  The present invention relates to a light-emitting device that includes a surface light emitter and is used as a lighting device that illuminates a closed space such as an object, a spacious scene, or a room, or a display device that transmits location and information.

  The light emitting device includes a point light source and a surface light source, and there are a surface light source in which the light emitting body itself emits light and a surface light source that forms a surface light source.

  In recent years, surface light emitters such as liquid crystals, plasma light emitters, and electroluminescence have been developed, and various surface light emitting devices have been developed.

  For example, Patent Document 1 discloses a light source that has an information display function and a light control function, and is used as a room partition, a showcase, an information display device, a door device, an external wall light control device, and a lighting device. .

JP 2007-61446 A

  In the conventional light emitting device, there is a light emitting area where partial light emission is performed for information transmission and light control, but there is no light emitting area that is switched between a housed state and an operating state.

  For example, it is conceivable that the light-emitting area is switched between a storage state and an operating state, the light-emitting area is turned off when the entire light-emitting area is in the storage state, and the light-emitting area is turned on when the whole light-emitting area is in the operating state. . However, with such a configuration, the light emission in the light emitting area is continued until the entire light emitting area is in the storage state, the energy consumption is large, the deterioration of the light source is fast, and the storage unit for storing the light emitting area is provided. There were problems such as high temperatures.

  When the storage section for storing the light-emitting area becomes high temperature, deterioration is promoted, and there is a risk of ignition, and other countermeasures are induced to take countermeasures.

  An object of the present invention is to solve such problems in the conventional light emitting device, and to provide a light emitting device that is energy saving and has a long lifetime.

The object is achieved by the following configurations (1) and (2).
(1) A light emitting device having a surface light emitter that can be developed from a stored state to an operating state, and a current control unit that controls a drive current so as to emit light to a portion where the surface light emitter is developed,
The surface light emitter is formed by connecting a plurality of light emitting plates in an accordion shape, and the current control means has electrodes corresponding to each of the light emitting plates,
The surface light emitter is expanded by increasing the angle between adjacent ones of the light emitting plates, and is stored by decreasing the angle,
If the angle is less than or equal to a predetermined value, the connection between the electrodes is broken,
When the angle is larger than the predetermined value, a connection between the electrodes is formed so that when the surface light emitter is expanded, the expanded portion emits light.
(2) The surface light emitter includes a support layer, a transparent electrode layer, an organic electroluminescence layer, and an electrode layer, and the support layer, the transparent electrode layer, and the electrode layer are formed in a continuous layer, and the organic electroluminescence The light emitting device according to (1), wherein the layer is composed of elements divided in a moving direction during expansion / storage, and the elements in the expanded part are selectively connected to a power source.
In addition, about the following 1-25, it is the structure used as a reference.

1.
A light emitting device comprising: a surface light emitter that can be developed from a storage state to an operating state; and a current control unit that controls a drive current so that a portion where the surface light emitter is developed is caused to emit light.

2.
2. The light-emitting device according to 1 above, further comprising a storage unit that stores the surface light emitter.

3.
The light emission according to 1 or 2, wherein the housed state is a state in which the surface light emitter is wound and formed on a roll, and the surface light emitter is developed by being pulled out from the roll. apparatus.

4).
4. The light-emitting device according to any one of 1 to 3, further comprising a counter electrode that is provided to face the surface light emitter and that can be developed from a stored state to an operating state.

5.
The stowed state is a state in which the counter electrode is wound and formed on a roll, and the counter electrode is unfolded by being pulled out from the roll, and the unfolded state of the surface light emitter is used as a power source in the unfolded state. 5. The light emitting device as described in 4 above, wherein the light emitting device is connected.

6).
The surface light emitter has a support layer, a transparent electrode layer, an organic electroluminescence layer, and an electrode layer, and the support layer, the transparent electrode layer, and the organic electroluminescence layer are formed in a continuous layer, and the current control means The electrode layer is composed of a number of elements divided in a moving direction during deployment / storage, and the elements are not connected to a power source in the storage state but are connected to the power source in a deployment state. The light-emitting device according to any one of 1 to 5 above.

7).
The surface light emitter has a support layer, a transparent electrode layer, an organic electroluminescence layer, and an electrode layer, and the support layer and the transparent electrode layer are formed in a continuous layer, and the organic electroluminescence layer and the current control means are The electrode layer is composed of a number of elements divided in a moving direction during deployment / storage, and the elements are not connected to a power source in the storage state but are connected to the power source in a deployment state. The light-emitting device according to any one of 1 to 5 above.

8).
The surface light emitter includes a support layer, a transparent electrode layer, an organic electroluminescence layer, and an electrode layer. The support layer, the transparent electrode layer, and the electrode layer are formed in a continuous layer, and the organic electroluminescence is developed. / Comprising a plurality of elements divided in the moving direction during storage, wherein the elements are not connected to the power supply in the storage state, but are connected to the drive circuit of the power supply in the unfolded state The light emitting device according to any one of 5.

9.
The current control means includes a switching element corresponding to each of the elements of the organic electroluminescence layer, having a Hall element and having a holding function, and a magnet device for switching the switching element. 9. The light emitting device according to 8.

10.
The surface light emitter has a support layer, a transparent electrode layer, an organic electroluminescence layer, and an electrode layer, and the support layer and the organic electroluminescence layer are formed in a continuous layer, and the transparent electrode constituting the current control means The layer and the electrode layer are composed of a large number of elements divided in a moving direction during deployment / storage, and the elements are not connected to a power source in the storage state but are connected to the power source in a deployment state. The light-emitting device according to any one of 1 to 5 above.

11.
11. The light emitting device according to 10 above, wherein the transparent electrode layer elements and the electrode layer elements are arranged in a staggered manner with respect to a moving direction during deployment / storage.

12
The surface light emitter includes a support layer, a transparent electrode layer, an organic electroluminescence layer, and an electrode layer. The support layer, the transparent electrode layer, and the electrode layer are formed in a continuous layer, and the organic electroluminescence layer is developed. / A plurality of elements divided in the moving direction during storage, wherein the current control means is formed on the first contactor corresponding to each of the elements of the organic electroluminescence layer and the electrode layer, A second contact corresponding to the contact;
In the storage state, the first contactor and the second contactor are separated from each other, and in the deployed state, the first contactor and the second contactor are in contact with each other. The light emitting device according to any one of the above.

13.
The surface light emitter is formed by connecting a plurality of light emitting plates in an accordion shape, and the current control means has electrodes corresponding to each of the light emitting plates,
The surface light emitter is expanded by increasing the angle between adjacent ones of the light emitting plates, and is stored by decreasing the angle,
If the angle is less than or equal to a predetermined value, the connection between the electrodes is broken,
When the angle is larger than a predetermined precursor value, a connection between the electrodes is formed, and when the surface light emitter is expanded, the expanded portion emits light. 2. The light emitting device according to 2.

14
The surface light emitter includes a support layer, a transparent electrode layer, an organic electroluminescence layer, and an electrode layer. The support layer, the transparent electrode layer, and the electrode layer are formed in a continuous layer, and the organic electroluminescence is developed. 3. The light emitting device according to 1 or 2 above, wherein the light emitting device comprises elements divided in the moving direction at the time of storage, and the elements in the developed part are selectively connected to a power source.

15.
The surface light emitter includes a plurality of light emitting plates, and the storage state is a state in which the plurality of light emitting plates are stacked, and the surface light emitter is unfolded by pulling out the light emitting plates from the stacked state. 3. The light emitting device as described in 1 or 2 above.

16.
16. The light emitting device as described in 15 above, wherein an electrode is provided at a leading end portion of the storage portion and the surface light emitter in the pulling direction.

17.
16. The item 15, wherein the current control unit includes a switching element having a holding function corresponding to each of the elements of the organic electroluminescence layer, and a magnet device for switching the switching element. Light-emitting device.

18.
The light source device according to 15 or 17, wherein the plurality of light emitting plates are pulled out in a partially overlapped state.

19.
16. The light source device as described in 15 above, wherein the plurality of light emitting plates are pulled out without overlapping.

20.
The rail has a rail for guiding the surface light emitter, and the surface light emitter is unfolded from the storage state guided by the rail, and the unfolded surface light emitter is stored. 20. The light emitting device according to any one of 19.

21.
21. The light emitting device as described in 20 above, wherein the rail constitutes an electrode for supplying a current to the surface light emitter.

22.
The storage portion has an attachment portion for attaching the surface light emitter, and an electrode constituting the current control means is provided in the attachment portion,
3. The light emitting device according to 2, wherein the surface light emitter does not emit light when not attached to the attachment portion, and emits light when a drive current is supplied from the electrode when attached to the attachment portion. apparatus.

23.
The light-emitting device according to any one of 1 to 22, wherein the surface light emitter has a plurality of light-emitting regions that generate light of different colors.

24.
24. The light-emitting device according to any one of 1 to 23, wherein the surface light emitter emits light on both sides and generates light of different colors on the front surface and the back surface.

25.
The surface light emitter includes a large number of LED elements arranged in a moving direction during deployment and storage, and a large number of light guide members corresponding to each of the LED elements and long in a direction perpendicular to the moving direction. The light-emitting device according to any one of 1 to 5, 13, 15, 16, and 22.

  The light emitting device according to the present invention, that is, the light source that emits light from the developing unit, as a whole, only the necessary part emits light compared to the light source that switches from non-light emission to light emission. Energy can be reduced.

  In addition, there is little deterioration and a long life can be achieved.

  From the viewpoint of space saving, the surface light emitter is rolled up or folded and stored, but there is no need to light the entire surface. Instead, only necessary parts are deployed.

  In such a usage mode, when the storage unit emits light, the storage unit rises in temperature due to heat accompanying light emission, and adversely affects the light emitter.

  In the light emitting device according to the present invention, since only the developing portion emits light, such a problem is solved.

It is a figure which shows the light-emitting device which concerns on Embodiment 1 of this invention. FIG. 3 is a diagram showing the structure of a surface light emitter 12 and a counter electrode 52. It is a figure which shows the light-emitting device which concerns on Embodiment 2 of this invention. It is a figure which shows the light-emitting device which concerns on Embodiment 3 of this invention. It is a figure which shows the light-emitting device which concerns on Embodiment 4 of this invention. It is a figure which shows the light-emitting device which concerns on Embodiment 5 of this invention. It is a figure which shows the light-emitting device based on Embodiment 6 of this invention. It is a figure which shows the light-emitting device based on Embodiment 6 of this invention. It is a figure which shows the light-emitting device based on Embodiment 7 of this invention. It is a figure which shows the light-emitting device which concerns on Embodiment 7 of this invention, and is an enlarged view of the connection part of a surface emitting board. It is a figure which shows the light-emitting device which concerns on Embodiment 7 of this invention, and is an enlarged view of the connection part of a surface emitting board. It is a figure which shows the light-emitting device based on Embodiment 8 of this invention. It is a figure which shows the light-emitting device based on Embodiment 8 of this invention. It is a figure which shows the light-emitting device based on Embodiment 8 of this invention. It is a figure which shows the light-emitting device based on Embodiment 8 of this invention. It is a figure which shows the light-emitting device based on Embodiment 9 of this invention. It is a figure which shows the light-emitting device based on Embodiment 10 of this invention. It is a figure which shows the light-emitting device which concerns on Embodiment 10 of this invention, and expands and shows an intermediate | middle drawer | drawing-out state. It is a figure which shows the light-emitting device based on Embodiment 11 of this invention. It is a figure which shows the light-emitting device based on Embodiment 12 of this invention. It is a figure which shows the light-emitting device based on Embodiment 13 of this invention. It is a figure which shows the light-emitting device based on Embodiment 14 of this invention.

  Hereinafter, the present invention will be described based on an embodiment, but the present invention is not limited to the embodiment.

  The light emitting device according to the present invention has a surface light emitter that is unfolded by an operation such as pulling out from a stored state, and the unfolded portion emits surface light.

  The surface light emitter has a surface light source made of organic electroluminescence (hereinafter referred to as organic EL), or has a point light source such as a light emitting diode element and a light guide plate. In the latter, light from the point light source is emitted from the light guide plate, and surface emission occurs.

  The light-emitting device of the present invention further includes current control means for supplying a drive current to the developed portion when the light-emitting device is deployed from the housed state to the activated state (non-housed state). As will be described below, it is configured by a pair of electrodes that supply a drive current to the light source, and is configured such that conduction / interruption between the electrode pair is switched between the housed state and the operating state.

  Further, the organic EL layer constituting the surface light source is formed in a continuous layer or is constituted by a number of divided elements.

  In still another embodiment, a surface light emitter having an organic EL layer is composed of a plurality of light-emitting plates, and each light-emitting plate is developed or a portion where each light-emitting plate is developed is the current control. The light is controlled by the means.

  FIG. 1 shows a light-emitting device according to Embodiment 1 of the present invention.

  12 is a surface light emitter, 52 is a counter electrode.

  Both the surface light emitter 12 and the counter electrode 52 are wound and formed in a roll.

  The storage units 10 and 50 indicated by dotted lines may be formed of a box-shaped storage body that forms a closed space, or are not provided with a storage unit, and are opposed to the shaft 11 on which the surface light emitter 12 is wound in the form of a roll. The electrode 52 may be formed of a shaft 51 wound in the form of a roll.

  The surface light emitter 12 has an organic EL layer and does not emit light in the housed state wound around the shaft 11, but the lower portion that is developed in a straight line emits light and generates light L.

  The surface light emitter 12 and the counter electrode 52 are movable up and down as indicated by an arrow W1, are drawn from the storage units 10 and 50, and are stored in the storage units 10 and 50.

  Although not shown, it is preferable that the surface light emitter 12 and the counter electrode 52 are automatically accommodated by providing springs on the shafts 11 and 51 and releasing the hands.

  FIG. 2 shows the structure of the surface light emitter 12 and the counter electrode 52.

  The surface light emitter 12 includes a support layer 13 made of a flexible transparent resin, a transparent electrode layer 14 made of ITO, an organic EL layer 151 and an electrode 161.

  The basic layer structure of the surface light emitter 12 is as shown in FIG. 2 (a), but if necessary, a hole injection layer, a hole transport layer, an electron blocking layer, an organic light emitting layer, a hole blocking layer. An organic EL layer having a laminated structure having an electron transport layer and an electron injection layer can be used as a surface light source of the surface light emitter 12.

  The support layer 13 and the transparent electrode layer 14 are uniform and integral continuous layers as shown in the figure.

  The transparent electrode layer 14 functions as an anode and is connected to a power source (not shown).

  As shown in FIG. 2B (FIG. 2B is a cross-sectional view showing the structure of the surface light emitter 12), the organic EL layer 151 is divided into a direction W1 that is a drawing-out and storing direction, and is drawn out. It consists of a number of striped elements that are long in the direction perpendicular to W1.

  The electrode 161 is also composed of an element corresponding to each element of the organic EL layer 151. The electrode 161 functions as a cathode and is grounded.

  The elements constituting the organic EL layer 151 are individually electrically connected to each of the elements constituting the electrode 161. Reference numeral 17 denotes an insulating layer that supports the electrode 161 and insulates between the individual organic EL elements and between the individual electrode elements.

  The counter electrode 52 is disposed so as to face the insulating layer 17 and has a width substantially equal to the width of the insulating layer 17.

  The counter electrode 52 includes an electrode layer 53 made of a uniform layer, an insulating layer 54, and an electrode 541.

  As shown in the figure, the electrode 541 is composed of a number of divided elements corresponding to the elements of the electrode 161.

  When the surface light emitter 12 and the counter electrode 52 are in contact with each other, the elements constituting the electrode 541 are in contact with each of the elements constituting the electrode 161 of the surface light emitter 12 in a one-to-one relationship.

  FIG. 2 (a) shows a cross section of a portion where the surface light emitter 12 and the counter electrode 52 have moved below the arrow W1 and have started contact.

  As shown in FIG. 2A, the element of the upper organic EL layer 151 where the electrode 161 and the electrode 541 are not in contact does not emit light, but the element of the lower organic EL layer 151 where the electrode 161 and the electrode 541 are in contact with each other. A circuit of transparent electrode 14-organic EL layer 151-electrode 161-electrode 541-electrode layer 53 is formed, and the element of organic EL layer 151 at the contact portion emits light.

  In the illustrated example, the electrode 161 and the electrode 541 are in point contact, but the electrode 161 and the electrode 541 are formed to have a length corresponding to the length of the stripe of each element of the organic EL layer 151. It can also be configured to contact.

  As described above, the elements of the electrode 161 and the electrode 541 constitute current control means for supplying a drive current to the developed portion of the surface light emitter 12 (the portion where the electrode 161 and the electrode 541 are in contact).

  FIG. 3 shows a second embodiment which is an example of a light emitting device in which the drawer portion emits light when the surface light emitter 12 is pulled out as in FIGS. 1 and 2. FIG. 3A is a side view showing a state in which the surface light emitter 12 is pulled out from the shaft 11, and FIG. 3B is an explanatory view showing a circuit of current control means.

  In the second embodiment, as shown in FIG. 3A, when the surface light emitter 12 is pulled out from the state of being housed in the shaft 11, the portion that has passed through the magnet device 56, that is, the lower linear portion emits light.

  The circuit of the current control means for partial light emission is as shown in FIG.

  The surface light emitter 12 includes a transparent electrode 14, an organic EL layer 151 composed of striped elements, a switching element 181 provided corresponding to each element of the organic EL layer 141, and a flexible surface light composed of an electrode layer 19. Is the body. The transparent electrode layer 14 functions as an anode, and the electrode layer 19 functions as a cathode.

  The switching element 181 has a hall element, and is a switching element having a holding function for holding a state when the hall element last passes.

  That is, the switching element 181 is turned ON when passing through the N-pole magnetic field, turned OFF when passing through the S-pole magnetic field, and is kept ON or OFF set by the last magnetic field in the absence of the magnetic field.

  The magnet device 56 is composed of a pair of magnets 561 and 562 as shown in the figure, and the lower magnet 561 has an N pole on the side close to the surface light emitter 12, and the upper magnet 562 is closer to the surface light emitter 12. Is the S pole.

  When the surface light emitter 12 is pulled out, that is, when moving from top to bottom, the Hall element 181 is set to the ON state by the N pole, and the switching element 181 that has passed through the magnet device 56 is held in the ON state. Is done.

  Therefore, the organic EL layer 151 in the lower surface light emitter portion emits light from the magnet device 56, and the upper organic EL layer 151 does not emit light.

  When the surface light emitter 12 moves from bottom to top during storage, the Hall element 181 is set to the OFF state by the S pole of the magnet device 56.

  Therefore, the organic EL layer 151 emits light at the lower part of the magnet device 56 and does not emit light at the upper part of the magnet device 56.

  FIG. 4 shows Embodiment 3 which is an example which has arrange | positioned the accommodating part up and down.

  The structures of the surface light emitter 12 and the counter electrode 52 in the present embodiment are the same as those in FIG. 1, and the operation thereof is also as described above.

  FIG. 5 shows a fourth embodiment, and the storage portion of the fourth embodiment is the same as that shown in FIG. 1 or FIG.

  The surface light emitter 12 includes a support layer 13 made of a transparent resin layer, a transparent electrode layer 14, an organic EL layer (organic electroluminescence layer) 15, and an electrode 161.

  The support layer 13, the transparent electrode layer 14, and the organic EL layer 15 are continuous layers as in the first embodiment, and the electrode 161 is composed of a number of elements divided in the moving direction W1 as in the first embodiment.

  The counter electrode 52 has a continuous band shape.

  In the upper part of the surface light emitter 12, the electrode 161 is separated from the electrode 52, but in the lower part of the surface light emitter 12, the electrode 161 is in contact with the electrode 52.

  Similarly to the first embodiment, the electrode 161 is formed in a pin shape or a protrusion, and can make point contact or line contact with the electrode 52.

  In the fourth embodiment, the organic EL emits light due to the current flowing through the transparent electrode 14 from the electrode 161 in contact with the electrode 52 of the element, and the organic EL layer 15 is a continuous layer. The portion of the surface light emitter 12 that emits light not only emits light, but also the organic EL emits light in the vicinity of the boundary between the contact portion and the non-contact portion even at a distant portion.

  However, as a whole, the developed part of the surface light emitter 12 emits light, and the storage part does not emit light.

  FIG. 6 shows a fifth embodiment.

  As shown in FIG. 6A (FIG. 6A is a side view of the light emitting device), the surface light emitter 12 in Embodiment 5 includes a support layer 13, a transparent electrode layer 141, an organic EL layer 15, and electrodes. 161.

  The support layer 13 and the organic EL layer 15 are continuous layers as shown in the figure, and the transparent electrode layer 141 includes a large number of striped elements 141 divided in the moving direction W1 of the surface light emitter 12.

  The organic EL layer 15 is a continuous layer as illustrated.

  Since the electrode 161 does not contact the counter electrode 52 above the surface light emitter 12, the organic EL layer 15 does not emit light, but the organic EL layer 15 emits light below the surface light emitter 12 which is a contact portion.

  Since the current flowing in the organic EL layer 15 flows between the electrodes 141 and 161, the light emitting portion and the non-light emitting portion are clearly separated.

  FIG. 6B shows an electrode arrangement in an example in which the organic EL emits light uniformly.

  As illustrated, the elements of the transparent electrode layer 141 and the elements of the electrode 161 are arranged such that the positions of the elements are staggered.

  With such an arrangement, the current from each element of the electrode 141 to each element of the electrode 161 is two-dimensionally uniformed, and the organic EL layer 15 emits light uniformly.

  7 and 8 show the sixth embodiment. FIG. 8A is a detailed view of the support layer 13A, and FIG. 8B is an explanatory view showing a state where the electrode 152 and the electrode 541 are in contact with each other.

  In Embodiment 6, the surface light emitter 12 includes a transparent electrode, an organic EL layer, and a counter electrode.

  As shown in FIG. 7, the surface light emitter 12 has a support layer 13A composed of a transparent support layer and a transparent electrode layer, a large number of stripe-shaped organic EL layers 151 divided in the moving direction W1, and an electrode 152. The electrode 541 is composed of a number of elements divided in the direction W1 and the counter electrode 52 forms a continuous layer.

  Each element constituting the electrode 152 is bonded to each element of the organic EL layer 151 and has a contact that rises from the organic EL layer 151.

  The electrode 541 constitutes a contact formed on a number of blocks 542 divided in the movement direction W1 and is electrically connected to the electrode 52.

  In the lower portion of the surface light emitter 12 shown in FIG. 7, that is, the portion A of the surface light emitter 12 held in a flat plate shape, the distance between the organic EL layers 151 is narrow and equal from the bottom close to the support layer 13A to the top. d1 (see FIG. 8A).

  On the other hand, in the portion B of the surface light emitter 12 that is wound around the shaft 11 and curved, the interval between the organic EL layers 151 is d2 wider than d1 as shown in FIG. 8A.

  That is, the interval between the organic EL layers 151 is narrow at the straight portion of the surface light emitter 12 and wide at the winding portion.

  On the other hand, the interval between the blocks 542 is wide at the winding part B, but is smaller than the spread of the interval between the organic EL layers 151.

  Therefore, in the linear portion of the surface light emitter 12 shown by A in FIG. 7, that is, in the developed portion, the electrode 152 and the electrode 541 are in contact with each other, and an electric circuit passing through the organic EL layer 151 is formed. In the housing portion of the surface light emitter 12 indicated by, the electrode 152 and the electrode 541 are separated from each other, and an electric circuit passing through the organic EL layer 151 is not formed.

  Thereby, only the expansion | deployment part of the surface light-emitting body 12 light-emits, and a storage part does not light-emit.

  9 to 11 show the seventh embodiment.

  In the light-emitting device according to Embodiment 7, the surface light emitter 80 is formed in an accordion shape as shown in FIG. 9, and is housed by folding and unfolded by stretching.

  In the seventh embodiment, the surface light emitter 80 includes a light emitting plate 801 constituting each side of the accordion, and emits light at a large portion A where the angle between adjacent light emitting plates 801 is indicated by θ1, and is a small portion indicated by θ2. Then, it does not emit light. Such light emission / non-light emission is switched with a predetermined angle as a boundary.

  Such current control means for performing ON / OFF control of the surface light emitter 80 is shown in FIGS.

  10 shows a connecting portion between adjacent light emitting plates 801 of the developed surface light emitter 80, and FIG. 11 shows a connecting portion between adjacent light emitting plates 801 of the accommodated surface light emitter 80. FIG.

  10 and 11, the transparent electrode layer 82 is formed on the transparent support layer 81, and the organic EL layer 831 is formed on the transparent electrode layer 82.

  The organic EL layer 831 is composed of a number of striped elements divided in the moving direction W2 of the surface light emitter 80.

  On the organic EL layer 831, an electrode 841 corresponding to each element constituting the organic EL layer 831 is formed.

  An electrode layer 86 that is a continuous layer is formed at a distance from the electrode 841, and a support layer 88 is formed on the electrode layer 86.

  A contact 85 is formed on each element of the electrode 841, and a contact 87 corresponding to the contact 85 is formed on the electrode layer 86.

  The contact 85 and the contact 87 are arranged as follows.

  When the surface light emitter 80 is deployed so that the angle between the adjacent light emitting plates 801 is equal to or greater than a predetermined angle, the contact 85 and the contact 87 contact each other as shown in FIG.

  On the other hand, when the surface light emitter 80 is housed so that the angle between the adjacent light emitting plates 801 is smaller than a predetermined angle, the contact 85 and the contact 87 are separated as shown in FIG. To do.

  The surface light emitter 80 emits light in the portion indicated by A in FIG. 9 and does not emit light in the portion indicated by B when moving in the W2 direction by ON / OFF of the electrical connection described above.

  12 to 15 show the eighth embodiment.

  As shown in FIG. 12, the eighth embodiment is installed on a ceiling 103 of a room and used as a lighting device that illuminates the room from the ceiling 103.

  A surface light emitter 80 in which a plurality of light emitting plates 801 are connected in an accordion shape is guided by rails 93 and 94 provided at both ends, and moved and accommodated / deployed as indicated by an arrow W2.

  The rails 93 and 94 have electrode portions 93A and 94A and insulating portions 93B and 94B, respectively. 14 shows the rail 93, the rail 94 has a similar structure.

  13 and 14 show the structure of the electrode.

  The surface light emitter 80 is in the form of an accordion, has a plurality of surface light emitters 801, and a support rod 901 is provided at a connecting portion between the surface light emitters 801 and 801.

  The support bar 901 includes electrodes 901A and 901B at both ends and an intermediate insulating portion 901C.

  The electrode 901A is guided in contact with the rails 93A and 93B, and the electrode 901B is guided in contact with the rails 94A and 94B.

  Although only the rail 93 is shown in FIG. 14, the rail 94 has a similar structure.

  The electrode 93A functions as an anode, and the electrode 94A functions as a cathode.

  The light emitting plate 801 includes a transparent support layer 81, a transparent electrode layer 82, an organic EL layer 83, and an electrode layer 840 as shown in FIG.

  The electrode 93A is connected to the transparent electrode layer 82 of the surface light emitter 80, and the electrode 94A is connected to the electrode layer 840 of the surface light emitter 80.

  As shown in FIG. 14, the electrode layer 840 is divided for each surface light emitting plate 801.

  The portions of the surface light emitter 80 that are in contact with the insulating portions 93B and 94B of the rails 93 and 94 do not emit light, and the portions that are in contact with the electrodes 93A and 94A emit light.

  That is, in the surface light emitter 80, the storage portion does not emit light, but the unfolded portion emits light.

  Fig.15 (a), FIG.15 (b), FIG.15 (c) shows the example of the rail which comprises an electrode.

  In FIG. 15A, one of the rails provided on the left and right is an anode, and the other is a cathode.

  In the example of FIG. 15B, the base portion that supports the surface light emitter 80 is formed on the electrode and functions as an anode, and the rail 91 is formed on the electrode and functions as a cathode.

  In the example of FIG. 15C, one of the two rail pieces forming the rail is an anode, and the other is a cathode.

  FIGS. 16A and 16B show the ninth embodiment.

  In the ninth embodiment, the surface light emitter 80 is stored in a folded state in the box-shaped storage unit 101, and when the surface light emitter 80 is pulled out, the extracted portion emits light. .

  The surface light emitter 80 is moved in the direction of the arrow W2 by the pulling operation, and after the entire light emitting plate 801 is pulled out, the next one is pulled out, and the respective light emitting plates 801 are pulled out without overlapping. Expanded.

  Reference numeral 90 denotes an electrode that is provided in the storage unit 101 and functions as an anode that contacts the transparent electrode layer 82 of the surface light emitter 80. The electrode 91 provided at the leading end portion of the surface light emitter 80 on the lead-out side constitutes a latch that holds the surface light emitter 80 in the lead-out state, and functions as a cathode.

  By pulling out the surface light emitter 80 in the W2 direction, the drawer portion emits light, and the storage portion does not emit light.

  By providing the light source installation portion with a plurality of latches that engage with the latches, the area of the lead portion of the surface light emitter 80 can be variously changed.

  With such a configuration, when the surface light emitter 80 is pulled out from the storage unit 101 and latched, the pulled-out portion emits light.

  17 (a), 17 (b), and 17 (c) show the tenth embodiment.

  In the tenth embodiment, the surface light emitter 80 is composed of a plurality of surface light-emitting plates 80a to 80d, and the entire light-emitting plate is fully stacked to be fully expanded into a single plate from the storage state where all the light-emitting plates are stacked. This is an example in which, in the process, the drawer portion emits light not only in the fully developed state but also in the intermediate state.

  That is, in the fully developed state of FIG. 17B, the entire lower surface 802 of the light emitting plate 801 generates light L, and in the intermediate state of FIG. 17C, each of the surface light emitting plates 80a, 80b, 80c, and 80d. Only the surface exposed downward generates light L, and the lower surface covered by the adjacent light emitting plate does not emit light.

  FIG. 18 is an enlarged view of the intermediate lead-out state of the surface light emitter 80 partially overlapped with the surface light emitter plates 80a to 80d.

  Each of the light emitting plates 80a, 80b, and 80c has a large number of light emitting elements 801a each having a striped organic EL divided in the storage / deployment direction W2.

  Each light emitting element 801a includes an organic EL and a switching element that controls conduction / cutoff of a current flowing through the organic EL.

  The switching element is composed of a Hall element, and is switched by a change in magnetic field.

  Magnet devices 95b, 95c, and 95d are fixed to the rear end of the light emitting plates 80b, 80c, and 80d in the direction W2, that is, the left end of FIG.

  Magnet devices 95b, 95c, and 95d are each composed of a pair of magnets.

  An electrode 91 is provided at a portion that supports the base of the surface light emitter 80 and functions as a cathode. An electrode 90 is provided at the leading end of the surface light emitter 80 and functions as an anode.

  The electrode 90 is provided in a latch that holds the surface light emitter 80 in a pulled-out state, and the latch opposite to the latch has the surface light emitter 80 in an intermediate deployment state as shown in FIGS. 17B and 17C. Provided at multiple locations.

  As already described with reference to the first embodiment, when the surface light emitter 80 is pulled out in the right direction of the direction W2, the light emitting element 801a that does not pass through the magnet devices 95b, 95c, and 95d emits light, and the magnet devices 95b, 95c, and 95d. The light emitting element 801b that has passed through is turned off.

  Therefore, only the element 801a of the organic EL layer on the lower surface where each light emitting plate 80a, 80b, 80c, 80d is exposed emits light, and the portion covered with the other light emitting plate is shown in black even on the lower surface. The element 801b of the organic EL layer does not emit light as shown in black.

  FIG. 19A and FIG. 19B show the eleventh embodiment.

  The surface light emitter 80 having the organic EL layer is stored in a state of being wound on the storage unit 101 while being attached to the mounting unit 102. 90 a is an electrode of the surface light emitter 80, and 90 b is an electrode of the mounting portion 102.

  The surface light emitter 80 attached to the attachment portion 102 has the same structure as the surface light emitter 12 described with reference to FIGS. 7 and 8, and the developed portion of the surface light emitter 12 emits light and is stored in the storage portion 101. The lighted part does not emit light.

  In the eleventh embodiment shown in FIG. 19, the surface light emitter 80 can be attached to and detached from the attachment portion 102, and can be replaced with another surface light emitter.

  FIG. 19A shows a state where the surface light emitter 80 is not attached to the attachment portion 102, and FIG. 19B shows a state where the surface light emitter 80 is attached to the attachment portion 102.

  As shown in FIG. 19A, the surface light emitter 80 does not emit light when away from the attachment portion 102.

  On the other hand, when the surface light emitter 80 is attached to the attachment portion 102, the developed portion of the surface light emitter 80 generates light L.

  In the illustrated example, the organic EL layer is formed only in the central portion 80e of the surface light emitter 80, and the central portion emits light.

  By changing the shape of the portion 80e forming the organic EL layer, the shape of the light emitting portion can be variously changed.

  20A and 20B show the twelfth embodiment.

  In the twelfth embodiment, the surface light emitter 80 is accommodated in a pair of shafts 11a and 11b, and the surface light emitter 80 is configured to emit light in a stretched portion between the shaft 11a and the shaft 11b. .

  Electrodes 90 and 91 are disposed on the left and right sides of the surface light emitter 80, respectively.

  90 is an anode and 91 is a cathode.

  Although not shown in FIG. 20, electrodes are provided on both side edges of the surface light emitter 80, and the surface light emitter 80 in a region where the electrodes that are in contact with the electrodes 90 and 91 are disposed emits light.

  FIG. 20B shows another example of the twelfth embodiment. In this example, the surface light emitter 80 has a plurality of regions that emit light of different colors.

  As illustrated, the region 80R connected to the electrodes 90 and 91 emits red light, for example, and the region 80G emits green light.

  FIG. 21 shows the thirteenth embodiment.

  The thirteenth embodiment is an example in which both surfaces of a surface light emitter emit light and the front and back surfaces emit light of different colors.

  In the layer structure of the surface light emitter 80, the central portion is an electrode 84 made of Al or the like, and the electrode 84 is opaque and also serves as a support layer.

  Organic EL layers 83R and 83G are formed on both sides of the electrode 84.

  The organic EL layer 83R emits red light, and the organic EL layer 83G emits green light.

  82a and 82b forming the surface layer are transparent electrodes made of ITO.

  By using the current control means as in the first to thirteenth embodiments described above, the developed portions on both sides of the surface light emitter 80 in FIG. 21 can emit red light and green light.

  22A and 22B show the fourteenth embodiment.

  The fourteenth embodiment is an example in which a surface light emitter is configured using a light emitting diode (LED).

  The surface light emitter 12 includes a strip-shaped flexible support 20, a plurality of LED elements 211 arranged in the longitudinal direction of the support 20, a light guide plate 221 as a light guide member, and an electrode 231.

  For example, a drive current is supplied to the electrode 231 from the counter electrode 52 shown in FIG.

  As shown in FIG. 22B, the light output from the LED element 211 enters the light guide plate 221, is diffusely reflected by the protrusions 221 a formed on the light guide plate 221, and is emitted outside the light guide plate 221.

  As shown in the drawing, the light guide plate 221 has a strip shape that is long in the width direction of the support 20, and the portion where the LED element 211 is connected to the drive circuit emits light.

  In addition to the light guide plate 221 shown in FIG. 22, in addition to the light guide plate 221 shown in FIG. 22, a surface light emitter such as that shown in the fourteenth embodiment, that is, one that emits light from a point light source using a light guide. Can be used.

  Furthermore, a surface light emitter composed of a point light source and a light guide member can also be used in the light emitting device shown in FIGS.

DESCRIPTION OF SYMBOLS 10, 50, 101 Storage part 12 80 Surface light emitter 52 Opposite electrode 13, 81 Support layer 14, 81 Transparent electrode layer 15, 151, 83, 831 Organic EL layer 161 Electrode 80a, 80b, 80c, 80d, 801 Light emitting plate

Claims (2)

A light emitting device having a surface light emitter that can be developed from a storage state to an operating state, and a current control unit that controls a drive current so as to emit light to a portion where the surface light emitter is developed,
The surface light emitter is formed by connecting a plurality of light emitting plates in an accordion shape, and the current control means has electrodes corresponding to each of the light emitting plates,
The surface light emitter is expanded by increasing the angle between adjacent ones of the light emitting plates, and is stored by decreasing the angle,
If the angle is less than or equal to a predetermined value, the connection between the electrodes is broken,
When the angle is larger than the predetermined value, a connection between the electrodes is formed so that when the surface light emitter is expanded, the expanded portion emits light.   The surface light emitter has a support layer, a transparent electrode layer, an organic electroluminescence layer and an electrode layer, and the support layer, the transparent electrode layer and the electrode layer are formed in a continuous layer, and the organic electroluminescence layer is The light-emitting device according to claim 1, wherein the light-emitting device is composed of elements divided in a moving direction during expansion / storage, and the elements in the expanded part are selectively connected to a power source.