JP2010176862A - Organic electroluminescent device and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an organic electroluminescent device and electronic equipment remarkably increasing reliability and a service life by surely preventing degradation of an organic electroluminescent element due to water and oxygen. <P>SOLUTION: In the organic EL device 1, a getter material 6 such as a drying material, a deoxidizing material or the like is disposed in a seal 7 covering the organic EL element 2. An evacuating opening 71 is formed in the seal 7 and hence the inside of the seal 7 can be evacuated via an exhaust tube 415 connected with the evacuating opening 71. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an organic electroluminescence device in which an organic electroluminescence element is covered with a sealing body, and an electronic apparatus including the organic electroluminescence device.

  In order to improve the reliability and life of the organic electroluminescence device, it is necessary to securely block the organic functional layer and the electrodes constituting the organic electroluminescence element from moisture (humidity), oxygen, and the like. Therefore, a structure in which the organic electroluminescence element is covered with a sealing body has been proposed. Such a sealing body generally includes a substrate provided with an organic electroluminescence element on one surface, a sealing member that covers one surface of the substrate, and a sealing material that joins the end of the sealing member and the substrate. (Refer patent document 1).

JP 2003-317942 A

  However, it is impossible to completely prevent moisture and oxygen from entering the sealing body. For example, when the end portion of the sealing member is bonded to the substrate with a sealing material, it is impossible to completely prevent moisture and oxygen from entering through the sealing material. Therefore, for the organic electroluminescence device, it is difficult to significantly improve the reliability and life even if the sealing structure is further improved.

  In view of the above problems, an object of the present invention is to provide an organic electroluminescence device capable of significantly improving reliability and lifetime by reliably preventing deterioration of the organic electroluminescence element due to moisture and oxygen, And providing an electronic apparatus including the organic electroluminescence device.

  In order to solve the above problems, an organic electroluminescence device according to the present invention (hereinafter referred to as an organic EL (Electro Luminescence) device) includes an organic electroluminescence element (hereinafter referred to as an organic EL element) and the organic EL element. A sealing body covering the surface, wherein the sealing body is formed with an opening for evacuation communicating with the inside of the sealing body.

  In the present invention, since the evacuation opening is formed in the sealing body that covers the organic EL element, the inside of the sealing body can be evacuated through the evacuation opening. Therefore, since moisture and oxygen that have entered the inside of the sealing body can be removed from the inside of the sealing body, it is possible to reliably prevent the organic functional layer and the electrode of the organic EL element from being deteriorated by moisture and oxygen. Can do. Therefore, the reliability and lifetime of the organic EL device can be greatly improved.

  In the present invention, the sealing body includes a substrate on which the organic EL element is provided on one surface, a sealing member that covers the one surface of the substrate, and a sealing material that joins the sealing member and the substrate. It is possible to adopt a configuration having

  In this invention, it is preferable that the getter material which absorbs at least one of a water | moisture content and oxygen is arrange | positioned inside the said sealing body. If comprised in this way, the water | moisture content and oxygen inside a sealing body can be removed with a getter material. Also, when the inside of the sealed body is evacuated through the evacuation opening, moisture and oxygen that have not yet reacted with the getter material out of the moisture and oxygen adsorbed on the getter material are desorbed from the getter material. It can be removed from the inside of the sealing body.

  An electronic apparatus including the organic EL device according to the present invention includes an exhaust device capable of evacuating the inside of the sealing body through the evacuation opening.

  In this case, the exhaust device may employ a configuration in which the inside of the sealing member is evacuated when the power of the electronic device is on, and the evacuation is suspended when the power of the electronic device is off. preferable. Even in such a configuration in which the evacuation inside the sealing body is suspended, moisture and oxygen that have entered the sealing body can be removed, so that the organic functional layer and the electrode of the organic EL element have moisture and oxygen. It is possible to reliably prevent the deterioration. In addition, useless power consumption can be suppressed if the configuration is performed while evacuating the inside of the sealing body is suspended. Further, if the electronic device is in operation, vacuuming can be performed at the timing when the organic EL element is turned on. Therefore, since the vacuum is evacuated in a state where the temperature of the inside of the sealing body is increased by lighting of the organic EL element, moisture and oxygen adsorbed in the sealing body can be efficiently removed.

It is explanatory drawing of the organic electroluminescent apparatus to which this invention is applied. It is a block diagram which shows the principal part structure of the electronic device to which this invention is applied. It is explanatory drawing of the image forming apparatus (electronic device) provided with the organic electroluminescent apparatus to which this invention is applied.

  Embodiments of the present invention will be described with reference to the drawings.

[Electronic equipment and organic EL devices]
(Configuration of organic EL device)
FIG. 1 is an explanatory diagram of an organic EL device to which the present invention is applied, and FIGS. 1A and 1B are a perspective view and a cross-sectional view showing the appearance of the organic EL device to which the present invention is applied, respectively. .

  In the organic EL device 1 shown in FIG. 1, a circuit unit 3 having a thin film transistor 15 and the like formed on one surface 11 a of a substrate 11 is formed, and a transparent layer made of ITO or the like is formed on the uppermost interlayer insulating film 16. A pixel electrode 24 is formed. The pixel electrode 24 is electrically connected to the thin film transistor 15. An insulating layer 17 made of a silicon oxide film or the like is formed on the upper layer of the pixel electrode 24 between the adjacent pixel electrodes 24, and the insulating layer 17 partially overlaps the pixel electrode 24. . Therefore, the surface of the pixel electrode 24 is exposed at the opening of the insulating layer 17. A partition wall 5 made of acrylic resin or polyimide resin having a height of 0.1 to 3.5 μm is formed on the insulating layer 17 so as to surround the pixel electrode 24. In this region, the organic functional layer 20 is laminated on the upper layer side of the interlayer insulating film 16. A cathode layer 25 is formed on the organic functional layer 20, and the pixel electrode 24, the organic functional layer 20, and the cathode layer 25 constitute the organic EL element 2. In FIG. 1B, the organic EL element 2 and the thin film transistor 15 are shown at positions where they overlap, but the organic EL element 2 and the thin film transistor 15 are formed at positions shifted from each other.

The organic functional layer 20 includes, for example, a hole injection transport layer 21 stacked on the pixel electrode 24 and a light emitting layer 22 stacked on the hole injection transport layer 21. In some cases, an upper layer or a lower layer of the light emitting layer 22 may be formed with other organic functional layers having other functions, such as an interlayer layer or an electron transport layer made of aluminum quinolinol (Alq ₃ ). The hole injection transport layer 21 has a function of injecting holes into the light emitting layer 22 and a function of transporting holes. In the light emitting layer 22, holes injected from the hole injecting and transporting layer 21 and electrons injected from the cathode layer 25 are recombined in the light emitting layer to emit light. Here, the light emitting layer 22 is configured to emit white light in all the organic EL elements 2 and to emit corresponding color light (for example, red light, green light, and blue light). There is a case.

  The hole injecting and transporting layer 21 is formed by discharging a liquid composition containing a hole injecting and transporting layer forming material and a solvent (including a dispersion medium) to the inside of the partition wall 5 and then removing the solvent. The light emitting layer 22 is also formed by discharging a liquid composition containing a light emitting layer forming material and a solvent (including a dispersion medium) to the inside of the partition wall 5 and then removing the solvent. Thus, when forming the positive hole injection transport layer 21 and the light emitting layer 22, the partition 5 has a function which prevents that a liquid composition protrudes outside. In such a configuration, the hole injecting and transporting layer 21 includes, for example, 3,4-polyethylenediosithiophene / polystyrene sulfonic acid (PEDOT / PSS) which is a polyolefin derivative, or polyphenylene whose polymer precursor is polytetrahydrothiophenylphenylene. It consists of organic functional materials such as vinylene, 1,1-bis- (4-N, N-ditolylaminophenyl) cyclohexane. The light emitting layer 22 is made of, for example, a polyfluorene derivative, a polyphenylene derivative, a polyvinylcarbazole, a polythiophene derivative, or a polymer material thereof. It consists of an organic functional material doped with anthracene, tetraphenylbutadiene, Nile red, coumarin 6, quinacridone and the like.

  Moreover, the hole injection transport layer 21 and the light emitting layer 22 may be formed by vapor deposition. In such a configuration, the hole injection transport layer 21 is made of a triarylamine (ATP) multimer or the like. The light emitting layer 22 is made of a styrylamine-based material containing an anthracene-based dopant or a rubrene-based dopant.

  The cathode layer 25 is formed on substantially the entire surface of one side of the substrate 11 or in a stripe shape, and plays a role of passing a current through the organic functional layer 20 in a pair with the pixel electrode 24. The cathode layer 25 is configured by, for example, laminating a calcium layer and an aluminum layer. In this embodiment, the cathode layer 25 is in direct contact with the light emitting layer 22 and plays a role of injecting electrons into the light emitting layer 22. Depending on the material of the light emitting layer 22, the light emitting layer 22 is intended to increase the light emission efficiency. An electron injection layer such as LiF may be formed between the cathode layer 25 and the cathode layer 25.

  The organic EL device 1 of this embodiment is a bottom emission type that emits light from the substrate 11 side, and the cathode layer 25 is made of a reflective material such as Al (aluminum). Therefore, the light emitted from the organic functional layer 20 to the substrate 11 side is emitted to the lower side of the substrate 11, and the light emitted from the organic functional layer 20 to the opposite side of the substrate 11 is reflected by the cathode layer 25 to be the substrate. 11 is transmitted to the lower side of the substrate 11. Therefore, in the bottom emission type organic EL device 1, a transparent substrate such as glass, quartz, or transparent resin is used as the substrate 11.

  In addition, if the cathode layer 25 is formed in a state capable of transmitting light with ITO, Pt, Ir, Ni, Pd, Al, and the like, and a reflective layer is formed on the lower layer side of the pixel electrode 24, the cathode layer 25 side It can be configured as a top emission type that emits light. In this case, as the substrate 11, in addition to a transparent substrate such as glass or quartz, an opaque substrate such as resin, ceramic or metal can be used.

  In either case, the substrate 11 is used as a part of the sealing body 7 described below. Accordingly, the substrate 11 preferably has a barrier property (non-gas permeable property) to moisture (humidity), oxygen, and the like. From this point of view, the substrate 11 is preferably made of glass or quartz.

(Configuration of sealing body 7 and getter material)
In the organic EL device 1 of this embodiment, the cathode layer 25 and the organic functional layer 20 constituting the organic EL element 2 are deteriorated when coming into contact with moisture or oxygen, and dark spots are generated. Therefore, in this embodiment, the sealing body 7 is configured using the substrate 11 to prevent the cathode layer 25 and the organic functional layer 20 from coming into contact with moisture or oxygen.

  In configuring this sealing body 7, in this embodiment, the substrate 11, the sealing member 8 covering the one surface 11 a side of the substrate 11, and the end portion 81 formed in a flat plate shape on the outer peripheral side of the sealing member 8. And a sealing material 9 such as an epoxy resin that joins the substrate 11 to each other. The sealing material 9 bonds the substrate 11 and the sealing member 8 along the outer peripheral edge, and the internal space 70 of the sealing body 7 is in a hollow state. In this embodiment, since the organic EL device 1 is a bottom emission type, the sealing member 8 is made of a metal such as stainless steel, aluminum or an alloy thereof, a glass such as soda lime glass or silicate glass, an acrylic resin, The thing made from resin, such as a styrene resin, can be used. On the other hand, when the organic EL device 1 is a top emission type, the sealing member 8 is made of a translucent member such as glass.

  In the organic EL device 1 of this embodiment, a getter material 6 that absorbs moisture and oxygen is disposed in an internal space 70 surrounded by the substrate 11, the sealing member 8, and the sealing material 9. In some cases, the getter material is disposed in a recess formed in the sealing member 8, but in FIG. 1B, the getter material 6 is disposed on the side of the region where the organic EL element 2 is formed. An example is shown.

When a desiccant is used as the getter material 6, the type is not limited as long as it can absorb moisture in the internal space 70, and various types can be used. For example, as the getter material 6, sodium oxide (Na ₂ O), potassium oxide (K ₂ O), calcium oxide (CaO), barium oxide (BaO), magnesium oxide (MgO), lithium sulfate (Li ₂ SO ₄ ) Sodium sulfate (Na ₂ SO ₄ ), calcium sulfate (CaSO ₄ ), magnesium sulfate (MgSO ₄ ), cobalt sulfate (CoSO ₄ ), gallium sulfate (Ga ₂ (SO ₄ ) ₃ ), titanium sulfate (Ti (SO _{4) 2} ), nickel sulfate (NiSO ₄ ), calcium chloride (CaCl ₂ ), magnesium chloride (MgCl ₂ ), strontium chloride (SrCl ₂ ), yttrium chloride (YCl ₃ ), copper chloride (CuCl ₂ ), cesium fluoride ( CsF), tantalum fluoride (TaF _5), niobium fluoride (NbF _5), calcium bromide (CaBr _2), Cerium (CeBr _3), bromide selenium (SEBR _4), vanadium bromide (VBr _2), magnesium bromide (MgBr _2), barium iodide (BaI _2), magnesium iodide (MgI _2), perchlorate Barium (Ba (ClO ₄ ) ₂ ), magnesium perchlorate (Mg (ClO ₄ ) ₂ ), or the like can be used.

  When a deoxidizing material is used as the getter material 6, there is no limitation on the type as long as it can absorb oxygen in the internal space 70, and various types can be used. For example, examples of the getter material 6 include activated carbon, silica gel, activated alumina, molecular sieve, magnesium oxide, iron oxide, and titanium oxide.

  As the getter material 6, only a desiccant material, only a deoxidizing material, or both of them may be provided. Or you may provide the getter material 6 which combines the function of both a desiccant and a deoxidation raw material like magnesium oxide.

  The organic EL device configured as described above is assembled in an inert atmosphere so that moisture and oxygen do not remain in the internal space 70 surrounded by the substrate 11, the sealing member 8, and the sealing material 9. Further, even if moisture or oxygen penetrates through the sealing material 9, the moisture or oxygen can be removed by the getter material 6. However, when moisture or oxygen exceeding the capacity of the getter material 6 enters the internal space 70, the organic EL element 2 deteriorates. Therefore, in this embodiment, the sealing body 7 is provided with a vacuum opening 71, and the exhaust pipe 415 is connected to the vacuum opening 71. Here, the evacuation opening 71 may be formed in any member of the sealing member 8, the substrate 11, and the sealing material 9 used in the sealing body 7. A vacuum evacuation opening 71 is formed at a position shifted from the position facing the organic EL element 2.

(Configuration of electronic equipment)
FIG. 2 is a block diagram showing a main configuration of an electronic apparatus to which the present invention is applied. As shown in FIG. 2, the organic EL device 1 of this embodiment is evacuated inside the sealing body 7 through the evacuation opening 71 after being mounted on the electronic apparatus 400. The electronic device 400 is an image generation device, a lighting device, a display device, or the like, which will be described later with reference to FIG. 3, and includes a controller 450 that controls the entire electronic device, and the organic EL device 1 described with reference to FIG. And an exhaust device 410 for evacuating the organic EL device 1. The exhaust device 410 includes an exhaust pipe 415 connected to the organic EL device 1, an exhaust pump 413 connected to the organic EL device 1 through the exhaust pipe 415, and an electromagnetic wave interposed in the middle of the exhaust pipe 415. And a valve 411.

  In the electronic device 400, the exhaust pump 413 is in a stopped state and the electromagnetic valve 411 is in a closed state while the power of the electronic device 400 is off.

  Next, when the electronic apparatus 400 is turned on, the controller 450 operates the exhaust pump 413 and opens the electromagnetic valve 411. As a result, in the organic EL device 1, the inside of the sealing body 7 shown in FIG. For this reason, moisture and oxygen that have entered the inside of the sealing body 7 through the sealing material 9 are removed from the inside of the sealing body 7. Of the moisture and oxygen adsorbed on the getter material 6, moisture and oxygen that have not yet reacted with the getter material 6 are desorbed from the getter material 6 and removed from the inside of the sealing body 7.

  In the meantime, when the organic EL element 2 of the organic EL device 1 is energized, the organic EL element 2 emits light.

  When the electronic device 400 is turned off, the controller 450 closes the electromagnetic valve 411 and stops the exhaust pump 413.

  The above operation is executed every time the electronic apparatus 400 is turned on. Therefore, the inside of the sealing body 7 is always maintained in a state free from moisture and oxygen.

  In the example shown in FIG. 3, the exhaust device 410 is operated in conjunction with the power on / off of the electronic device 400, but the electronic device 400 is in the power-on state and the organic EL device 1 is operated. The exhaust device 410 may be operated only when the lighting operation is performed. In addition, the exhaust device 410 may be operated every time set in the timer while the electronic device 400 is powered on.

(Main effects of this form)
As described above, in the organic EL device 1 according to the present embodiment, the evacuation opening 71 is formed in the sealing body 7 that covers the organic EL element 2. The inside of the body 7 can be evacuated. Accordingly, since moisture and oxygen that have entered the sealing body 7 can be removed from the sealing body 7, the organic functional layer 20 and the cathode layer 25 of the organic EL element 2 are deteriorated by moisture and oxygen. Can be reliably prevented. Therefore, the reliability and lifetime of the organic EL device 1 can be greatly improved.

  Further, since the getter material 6 is disposed inside the sealing body 7, moisture and oxygen inside the sealing body 7 can be removed by the getter material 6. Further, when the inside of the sealing body 7 is evacuated through the evacuation opening 71, the moisture and oxygen that have not yet reacted with the getter material 6 out of the moisture and oxygen adsorbed on the getter material 6 are getter materials. 6 can be detached from the inside of the sealing body 7. That is, in the case where the getter material 6 is a material that chemically reacts with moisture and oxygen, if the moisture and oxygen are physically adsorbed on the getter material 6, when the inside of the sealing body 7 is evacuated, It can be detached and removed from the inside of the sealing body 7.

  Further, in this embodiment, the exhaust device 410 evacuates the inside of the sealing body 7 when the power source of the electronic device 400 is on, and pauses evacuation when the power source of the electronic device 400 is off. As described above, even when the evacuation inside the sealing body 7 is stopped, moisture and oxygen that have entered the inside of the sealing body 7 can be removed. Moreover, if it is the structure performed while evacuating the inside of the sealing body 7 is suspended, wasteful power consumption can be suppressed. Further, if the electronic device 400 is in operation, evacuation can be performed at the timing when the organic EL element 2 is lit. Accordingly, since the vacuum is drawn while the temperature of the inside of the sealing body 7 is rising due to the lighting of the organic EL element 2, moisture and oxygen adsorbed in the sealing body 7 or desorption into the getter material 6 is performed. Moisture and oxygen in a possible state can be efficiently removed.

(Configuration example of electronic device 400)
FIG. 3 is an explanatory diagram of an image forming apparatus (electronic apparatus) provided with an organic EL device to which the present invention is applied. FIGS. 3A and 3B are for an image forming apparatus provided with an organic EL device, respectively. FIG. 2 is an explanatory view of the exposure head and an explanatory view of an image forming apparatus (electronic apparatus) including the exposure head.

  As the electronic apparatus 400 provided with the organic EL device 1 described with reference to FIG. 1, an image generation device 500 described below with reference to FIG. 3 can be exemplified. The image generating apparatus 500 is an apparatus having an image forming function such as a printer, a copier, and a facsimile machine. As shown in FIG. 3A, the printing portion is in the direction around the axis W (sub-scanning). A cylindrical photosensitive drum 110 that is supported so as to be rotatable in the direction), and an exposure head 10 (exposure device) for exposing an image surface 110A that is an outer peripheral surface of the photosensitive drum 110. . The exposure head 10 includes an organic EL device 1 and an erecting equal-magnification imaging element 120 as an imaging element. The erecting equal-magnification imaging element 120 includes a lens array. It is disposed between the image surface 110 </ b> A of the photosensitive drum 110.

  An image forming apparatus 500 shown in FIG. 3B is a tandem type full-color image forming apparatus using a belt intermediate transfer body method. In the image forming apparatus 500, four exposure heads 10K, 10C, 10M, and 10Y (the exposure head 10 shown in FIG. 3A) having the same configuration are replaced with four photosensitive drums 110K having the same configuration, 110C, 110M, and 110Y are respectively arranged at positions facing the image plane. Around each photosensitive drum 110 (K, C, M, Y), a corona charger 111 (K, C, M, Y) and a developer 114 (K, C, M, Y) are arranged. ing. Note that the subscripts K, C, M, and Y mean black, cyan, magenta, and yellow, respectively (hereinafter, the subscripts K, C, M, and Y are used in the same meaning for the other members). ).

  In addition, the image forming apparatus 500 is provided with a driving roller 121 and a driven roller 122. An endless intermediate transfer belt 120 is wound around these rollers 121 and 122, and the intermediate transfer belt 120 faces the photosensitive drum 110 (K, C, M, Y). Therefore, the intermediate transfer belt 120 rotates around the rollers 121 and 122 as indicated by the arrow B, so that the photosensitive drums 110 (K, C, M, and Y) are rotated in the direction of the arrow CW in synchronization. it can. Although not shown, a tension applying means such as a tension roller that applies tension to the intermediate transfer belt 120 may be provided.

  In forming a toner image (that is, a visible image) on the photosensitive drum 110 (K, C, M, Y), first, a corona charger 111 (K, C, M, Y) is used to perform the corresponding photosensitivity. The outer peripheral surface (image surface) of the body drum 110 (K, C, M, Y) is uniformly charged. Next, an electrostatic latent image is written on the image surface 110A of each charged photosensitive drum 110 by the exposure head 10 (K, C, M, Y). In each exposure head 10 (K, C, M, Y), a plurality of organic EL elements 2 (FIG. 1A) are formed along the bus (main scanning direction) of the photosensitive drum 110 (K, C, M, Y). )) Is arranged. Therefore, the electrostatic latent image is written by irradiating the photosensitive drum 110 (K, C, M, Y) with light by the organic EL element 2. Then, the developing device 114 (K, C, M, Y) attaches toner as a developer to the electrostatic latent image, thereby forming a static image formed on the photosensitive drum 110 (K, C, M, Y). The electrostatic latent image is visualized as a toner image.

  The black, cyan, magenta, and yellow toner images formed by the developing devices 114 (K, C, M, and Y) are temporarily transferred onto the intermediate transfer belt 120 to be superimposed on the intermediate transfer belt 120. As a result, a full-color toner image is obtained. Four temporary transfer corotrons (transfer devices) 112 (K, C, M, Y) are arranged inside the intermediate transfer belt 120. The primary transfer corotron 112 (K, C, M, Y) is disposed in the vicinity of the photosensitive drum 110 (K, C, M, Y), and the photosensitive drum 110 (K, C, M, Y). By electrostatically attracting the toner image from the photosensitive drum 110 (K, C, M, Y) to the intermediate transfer belt 120 passing between the primary transfer corotron 112 (K, C, M, Y). Transfer the toner image.

  A sheet 102 as an object on which an image is to be finally formed is fed one by one from the sheet feeding cassette 101 by the pickup roller 103, and between the intermediate transfer belt 120 and the secondary transfer roller 126 in contact with the driving roller 121. Sent to the nip. The full-color toner image transferred onto the intermediate transfer belt 120 is secondarily transferred collectively onto one side of the sheet 102 by the secondary transfer roller 126 and passes onto the sheet 102 by passing through the fixing roller pair 127 serving as a fixing unit. It is fixed. Thereafter, the sheet 102 is discharged onto a paper discharge cassette formed in the upper part of the apparatus by a paper discharge roller pair 128.

(Another configuration example of the electronic device 400)
Although FIG. 3 illustrates an image generation apparatus as the electronic apparatus 400 to which the present invention is applied, the organic EL apparatus 1 to which the present invention is applied can also be used for electronic apparatuses such as a lighting apparatus and a display apparatus.

(Other embodiments)
In the above embodiment, the exhaust pump 413 is always connected to the exhaust pipe 415. However, only during maintenance of the electronic device 400, the exhaust pump 413 is connected to the exhaust pipe 415 to evacuate the inside of the sealing body 7. May be. In the above-described embodiment, the exhaust pipe 415 is always connected to the organic EL device 1. However, in normal times, the evacuation opening 71 is sealed with a stopper or the like, and only during maintenance of the electronic apparatus 400. The exhaust pipe 415 may be connected to the evacuation opening 71 to evacuate the inside of the sealing body 7.

  In the above embodiment, a configuration in which the inside of the organic EL device 1 is always evacuated by the exhaust device 410 may be employed. In this case, the getter material 6 may be omitted.

DESCRIPTION OF SYMBOLS 1 ... Organic EL device 2 ... Organic EL element 6 ... Getter material 7 ... Sealing body 8 ... Sealing member 9 ... Sealing material 10 ... Exposure head 11 ... Substrate 20 ... Organic functional layer 24 ... Pixel electrode 25 ... Cathode layer 70 ... Internal space of sealing body 71 ... Vacuum opening 415 ... Exhaust pipe 400 ... Electronic equipment , 450 ... Controller 410 ... Exhaust device 413 ... Exhaust pump 411 ... Solenoid valve 500 Image forming device (electronic equipment)

Claims (5)

An organic electroluminescence element;
A sealing body covering the organic electroluminescence element;
Have
The organic electroluminescence device according to claim 1, wherein an opening for vacuuming communicating with the inside of the sealing body is formed in the sealing body.   The sealing body includes: a substrate on which the organic electroluminescence element is provided on one surface; a sealing member that covers the one surface of the substrate; and a sealing material that joins the sealing member and the substrate. The organic electroluminescence device according to claim 1, wherein the organic electroluminescence device is provided.   The organic electroluminescent device according to claim 1, wherein a getter material that absorbs at least one of moisture and oxygen is disposed inside the sealing body. An electronic apparatus comprising the organic electroluminescence device according to any one of claims 1 to 3,
An electronic apparatus comprising an exhaust device capable of evacuating the inside of the sealing body through the evacuation opening.   5. The exhaust system according to claim 4, wherein the exhaust device evacuates the inside of the sealing member when the power of the electronic device is on, and stops the evacuation when the power of the electronic device is off. The electronic device described.

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