JP2009048851A - Organic electroluminescent device and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an organic electroluminescent device which establishes a depositing condition of a luminous layer and has an excellent luminous property of each of luminous elements. <P>SOLUTION: The organic electroluminescent device is provided with a plurality of luminous layers 70R, 70G, 70B in which there are arranged, on an element substrate, pixel regions composed of a plurality of sub-pixel regions 90R, 90G, 90B of different display colors in a matrix and each of the sub-pixel regions 90R, 90G, 90B has a different luminous color, and barrier ribs for dividing a plurality of the luminous layers 70R, 70G, 70B. At least one of the sub-pixel regions 90R, 90G, 90B composing the pixel regions has a different size from other sub-pixel regions 90R, 90G, 90B, and the sub-pixel regions 90R, 90G, 90B are composed of one rectangular region a, b, or a plurality of rectangular regions c, d, of which the longitudinal sides are combined crossing each other. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an organic electroluminescence device and an electronic apparatus.

In recent years, a light emitting material such as an organic fluorescent material is converted into an ink, and a method of patterning the light emitting material by an ink jet method in which this ink is ejected onto a substrate is employed, and the light emitting material is formed between the anode and the cathode. Development of a color organic electroluminescence device (organic EL device) including a light emitting element in which a light emitting layer is sandwiched is underway.
By the way, when manufacturing an organic EL device using the inkjet method, it is important to uniform the light emission characteristics such as luminance, color purity, light emission lifetime, etc. of each pixel (light emitting element) formed in an array, Such uniform emission characteristics greatly affect the production yield of organic EL devices.
Several devices have been proposed for the purpose of uniforming the light emission characteristics of each light emitting element. For example, in Patent Document 1, the area of the green (G) light emitting layer on the substrate is smaller than the area of the red (R) or blue (B) light emitting layer (see, for example, Patent Document 1).
JP 2001-290441 A

  However, in order to make the light emission characteristics of the light emitting elements uniform, in addition to changing the area of the light emitting layer for each color as in the past, it is necessary to form each light emitting layer uniformly and flatly between pixels. It is. In particular, the color unevenness and lifetime of the light emitting element greatly vary depending on film forming conditions such as the uniformity and flatness of the thickness of the light emitting layer, and this film forming condition becomes important for improving the light emitting characteristics.

  Some conventional organic EL devices, such as Patent Document 1, have different areas of each sub-pixel region for each color. That is, different light emission characteristics (light emission lifetime differences) for each color are made uniform by varying the light emission area (area of the light emitting layer) of each light emitting element. However, when such a material for forming a light emitting layer is sprayed onto an ink jet substrate, the amount of liquid droplets (droplet size) varies depending on the material, resulting in a difference in the time of the drying process performed to obtain the light emitting layer. End up. Therefore, it is difficult to flatten the film shape of each light emitting layer.

  The present invention has been made in view of the above-described problems of the prior art, and provides an organic electroluminescence device and an electronic apparatus that establish the film-forming conditions of the light-emitting layer and have good light-emitting characteristics of each light-emitting element. It is an object.

  In order to solve the above-described problems, the organic electroluminescence device of the present invention has a pixel area composed of a plurality of sub-pixel areas having different display colors arranged in a matrix on the substrate, and the emission color is different for each sub-pixel area. The pixel region has a plurality of light-emitting layers and partition walls that partition the plurality of light-emitting layers, and at least one of the plurality of sub-pixel regions constituting the pixel region is different in area from the other sub-pixel regions. The plurality of sub-pixel regions are configured by one rectangular region or a plurality of rectangular regions connected so that their longitudinal directions intersect each other.

According to the organic electroluminescence device of the present invention, the sub-pixel region is composed of one rectangular region or a plurality of rectangular regions, and the pixel region is configured by the number of rectangular regions and the length in the longitudinal direction. The areas of the at least one sub-pixel region are made different. In addition, when the sub-pixel area is composed of a plurality of rectangular areas, the sub-pixel areas are combined so that their longitudinal directions intersect each other, so that the width of the sub-pixel area composed of the plurality of rectangular areas (that is, the short side of the rectangular area) (The length in the direction) and the width of the sub-pixel region made up of one rectangular region can be made equal, whereby all the widths of the sub-pixel regions in the pixel region can be made constant.
Thereby, for example, when the light emitting layer is formed by a liquid phase method such as an ink jet method, the material for forming the light emitting layer can be arranged in a uniform film thickness for each sub-pixel region. Then, the difference in the drying speed of each material is suppressed, the flatness of the film surface is ensured, and a light emitting layer with a uniform film thickness can be obtained. In this way, the uniformity and flatness of the thickness of the light emitting layer is ensured, light emission unevenness between sub-pixel regions is prevented, color unevenness and life difference are suppressed, and light emission characteristics (luminance, color purity, etc.) Can be improved.
Further, by changing the area of at least one of the plurality of sub-pixel regions constituting the pixel, the light emission lifetime difference in each sub-pixel region can be suppressed uniformly.

The partition wall preferably includes a plurality of openings having the same opening area, and at least one of the sub-pixel regions constituting the pixel preferably has a different number of openings from the other sub-pixel regions.
According to such a configuration, in order to form the light emitting element on the substrate, for example, when the material for forming the light emitting layer is applied in each opening of the partition wall using an inkjet method, all the openings on the substrate are formed. Since the opening areas are the same, the amount of droplets of the forming material ejected to each opening (droplet size in the unit region) is substantially the same. Thereby, the forming material can be applied with a uniform film thickness in each opening, and when the light emitting layer is obtained by the drying process, the drying speed of the forming material becomes substantially equal. Therefore, favorable dry film formation is possible, and the film surface of the light emitting layer in each opening can be flattened. Therefore, uneven light emission is prevented from occurring in each light emitting element, and excellent light emission characteristics can be obtained. Moreover, the arrangement regularity of each droplet tod can be made uniform, and the jetting property of the material by the ink jet method is improved.

The partition preferably has a plurality of openings corresponding to each sub-pixel region, and the opening widths of the openings are substantially equal.
According to such a configuration, the opening widths of all the openings on the substrate are made equal, and in order to form a light emitting element on the substrate, a light emitting layer is formed in the opening of the partition wall using, for example, an ink jet method. When a material or the like is applied, the spread of each forming material injected into each opening is substantially equal in the width direction of the opening. Thereby, each forming material can be apply | coated with uniform film thickness in each opening part, and when obtaining a light emitting layer by a drying process, the drying speed of each forming material becomes substantially equal. Therefore, favorable dry film formation is possible, and the film surface of the light emitting layer in each opening can be flattened. Therefore, uneven light emission is prevented from occurring in each light emitting element, and good light emission characteristics can be obtained.

Moreover, it is preferable that the partition walls are integrally formed so as to surround the plurality of light emitting layers.
According to such a configuration, the material for forming the light emitting layer is hardly affected by the partition walls, and a flat film can be obtained as the light emitting layer. In addition, the partition wall can be easily formed.

In addition, it is preferable that the light emitting layer corresponding to one of the plurality of light emitting layers has a lattice shape and surrounds the light emitting layers corresponding to the other light emitting colors.
According to such a configuration, the material for forming the light emitting layer formed in a lattice shape is hardly affected by the partition walls, and a flat film as the light emitting layer can be obtained. In addition, the partition wall can be easily formed.

Further, it is preferable to increase the area of the light emitting layer for a color having a short light emitting lifetime.
According to such a configuration, a desired light emission luminance can be obtained with a low current, and the light emission lifetime in the light emitting layer of each color can be made uniform.

An electronic apparatus according to the present invention includes the organic electroluminescence device described above.
According to the present invention, since the organic electroluminescence device having no light emission unevenness (color unevenness) or light emission life variation is provided, an electronic apparatus including a display unit having excellent display quality can be provided.

The present invention will be described in detail below. The embodiments described below show some aspects of the present invention and do not limit the present invention, and can be arbitrarily changed within the scope of the technical idea of the present invention. Moreover, in each figure shown below, in order to make each layer and each member the size which can be recognized on drawing, the scale is varied for each layer and each member.
[First Embodiment of Organic EL Device]
First, a first embodiment of an organic electroluminescence device of the present invention (hereinafter referred to as “organic EL device”) will be described.
FIG. 1 is an explanatory diagram showing a wiring structure of an embodiment of the organic EL device of the present invention, FIG. 2 is a plan view schematically showing the configuration of the organic EL device shown in FIG. 1, and FIG. FIG. 4 is a schematic cross-sectional view of the main part of the organic EL device of the present invention.

  The organic EL device 1 in the present embodiment is an organic EL device in which one pixel is configured by three sub-pixel regions that emit light of each color of R (red), G (green), and B (blue). Hereinafter, the pixel area which is the minimum unit constituting the display is referred to as a “sub-pixel area”. Note that the pixel configuration is not limited to this, and one pixel may be configured with R (red) and G (green), or R (red), G (green), B (blue), and C ( Cyan) may constitute one pixel, and is not limited to the color configuration of sub-pixels. Further, the sub-pixel region does not necessarily have to coincide with the light emitting region (area), and may be a region including a plurality of light emitting elements of the same color.

  As shown in FIG. 1, the organic EL device 1 of the present embodiment includes a plurality of scanning lines 101, a plurality of signal lines 102 extending in a direction intersecting the scanning lines 101, and a plurality extending in parallel with the signal lines 102. The power source line 103 is wired, and the pixel region A is formed in the vicinity of each intersection of the scanning line 101 and the signal line 102.

Connected to the signal line 102 is a data side driving circuit 104 including a shift register, a level shifter, a video line, and an analog switch. A scanning side driving circuit 105 including a shift register and a level shifter is connected to the scanning line 101. In each of the pixel regions A, a switching thin film transistor 122 to which a scanning signal is supplied to the gate electrode via the scanning line 101 and a pixel signal supplied from the signal line 102 via the switching thin film transistor 122 are provided. Is electrically connected to the power supply line 103 via the driving thin film transistor 123, the driving thin film transistor 123 to which the pixel signal held by the holding capacitor cap is supplied to the gate electrode, and the driving thin film transistor 123. In addition, an anode (pixel electrode) 111 into which a driving current flows from the power supply line 103 and a light emitting functional layer 110 sandwiched between the pixel electrode 111 and the cathode (counter electrode) 12 are provided.
The anode (pixel electrode) 111, the cathode (counter electrode) 12, and the light emitting functional layer 110 constitute an organic EL element (hereinafter referred to as the light emitting element 3).

  According to such a configuration, when the scanning line 101 is driven and the switching thin film transistor 122 is turned on, the potential of the signal line 102 at that time is held in the holding capacitor cap, and according to the state of the holding capacitor cap. The on / off state of the driving thin film transistor 123 is determined. Then, a current flows from the power supply line 103 to the pixel electrode 111 through the channel of the driving thin film transistor 123, and further a current flows to the cathode 12 through the light emitting functional layer 110. Then, the light emitting functional layer 110 emits light according to the amount of current flowing therethrough.

(Planar structure)
Next, the planar structure of the organic EL device 1 will be described with reference to FIGS.
FIG. 2 is a diagram showing a TFT element substrate (hereinafter referred to as “element substrate”) 2 that causes the light emitting element 3 to emit light by the above-described various wirings, TFTs, and various circuits formed on the element substrate 2. The element substrate 2 of the organic EL device 1 includes an actual display area SA in the center (inside the two-dot chain line frame in FIG. 2) and a dummy area SB (one-dot chain line and two-dot chain line) arranged around the actual display area SA. Between).

  In the actual display area SA shown in FIG. 2, sub-pixel areas 90 (90R, 90G, 90B) that emit any one of red (R), green (G), and blue (B) light (FIG. 3A). Are arranged in a matrix. As shown in FIG. 3A, each of the sub-pixel regions 90R, 90G, and 90B has a different size (area) and shape for each color. Specifically, the relationship between the sizes of the sub-pixel areas is sub-pixel area 90B> sub-pixel area 90G> sub-pixel area 90R, and the blue (B) light-emitting area is the largest. In addition, the arrangement of the sub pixel areas 90R, 90G, and 90B in the pixel area is repeated in the order of the sub pixel area 90B, the sub pixel area 90R, and the sub pixel area 90G in the extending direction of the scanning line 101. .

Next, the sub pixel regions 90R, 90G, and 90B will be described in detail.
As shown in FIG. 3B, the sub-pixel region 90R and the sub-pixel region 90G are composed of rectangular regions a and b having different sizes, and each has a longitudinal direction along the signal line 102. It has become. On the other hand, the sub-pixel region 90B is configured by combining a plurality of rectangular regions c and d having different sizes, and the longitudinal directions of the sub-pixel regions 90B are orthogonal to each other and have an L shape in plan view. The rectangular regions c and d are arranged along the signal line 102 or the scanning line 101 in the longitudinal direction. The rectangular area is a name for convenience and does not have to be actually rectangular.

In the present embodiment, since a part of the sub pixel area 90B protrudes toward the sub pixel area 90R, a part of the sub pixel area 90R and a part of the sub pixel area 90B in the extending direction of the signal line 102 in a part of the pixel. Thus, an arrangement of two colors is obtained.

  The sub-pixel areas 90R, 90G, and 90B are combined into one display unit pixel (one pixel), and the display unit pixel performs full color display by mixing RGB light emission colors. ing. As described above, by changing the size of the display area for each color, the temporal luminance change characteristic of each color is made uniform.

  In addition, a plurality of light emitting elements 3 are arranged in each of the sub pixel regions 90R, 90G, 90B. The number of the light emitting elements 3 is different for each sub-pixel region 90 (for each color). For example, as shown in FIG. 3, two sub-pixel regions 90R that emit red (R) have two light-emitting elements 3 and sub-pixels. Three light emitting elements 3 that emit green (G) are provided in the region 90G, and four light emitting elements 3 that emit blue (B) are provided in the sub-pixel region 90B. 90 are arranged in a line along the outer shape. By varying the number of the light emitting elements 3 arranged, the sizes of the sub-pixel regions 90R, 90G, and 90B are varied.

  As shown in FIGS. 3A and 3B, the scanning lines 101 and the signal lines 102 are wired in a substantially lattice shape in plan view, and are used for driving pixels near the intersection of the scanning lines 101 and the signal lines 102. A thin film transistor 123 is connected.

  Further, the scanning side drive circuit 105 is disposed on both sides of the actual display area SA in FIG. 2 and on the lower layer side of the dummy area SB. Further, an inspection circuit 106 is disposed above the actual display area SA in FIG. 2 and below the dummy area SB. The inspection circuit 106 is a circuit for inspecting the operating state of the organic EL device 1, and includes, for example, inspection information output means (not shown) for outputting inspection results to the outside. The apparatus 1 is configured to be able to inspect the quality and defects.

(Cross-section structure)
Next, a cross-sectional structure of the organic EL device 1 will be described with reference to FIGS. 3 and 4.
As shown in FIG. 4, the organic EL device 1 of the present embodiment is configured to include the light-emitting elements 3 arranged in a matrix on an element substrate 2 made of glass or the like and having translucency. Yes. The light emitting element 3 formed on the element substrate 2 includes a pixel electrode 111, a light emitting functional layer 110 including the hole injection transport layer 60 and the light emitting layer 70, and the cathode 12. In addition, a circuit element unit 14 is formed between the EL element unit 10 including the light emitting element 3 and the element substrate 2 in the thickness direction of the element substrate 2. In the circuit element portion 14, the above-described scanning line, signal line, storage capacitor, thin film transistor 122 for switching, thin film transistor 123 for driving, and the like are formed.

  One end of the cathode 12 is connected to a cathode wiring (not shown) 12a formed on the element substrate 2, and one end of the wiring is connected to the wiring 5a on the flexible substrate 5 shown in FIG. It is connected. The wiring 5 a is connected to a driving IC 6 (driving circuit) provided on the flexible substrate 5.

  Further, in the organic EL device 1 of the present embodiment, light emitted from the light emitting functional layer 110 to the element substrate 2 side passes through the circuit element unit 14 and the element substrate 2 and is outside the element substrate 2 (observer side). Light that is emitted and emitted from the light emitting functional layer 110 to the side opposite to the element substrate 2 is also reflected by the cathode 12 and passes through the circuit element unit 14 and the element substrate 2 to be outside the element substrate 2 (observer side). ), So-called bottom emission type.

As shown in FIG. 4, in the circuit element portion 14, a base protective layer 281 mainly composed of SiO ₂ is formed as a base on the element substrate 2, and a silicon layer 241 is formed thereon. A gate insulating layer 282 mainly composed of SiO ₂ and / or SiN is formed on the surface of the silicon layer 241.
In the silicon layer 241, a region overlapping with the gate electrode 242 with the gate insulating layer 282 interposed therebetween is a channel region 241a. The gate electrode 242 is a part of a scanning line (not shown). On the other hand, a first interlayer insulating layer 283 mainly composed of SiO ₂ is formed on the surface of the gate insulating layer 282 that covers the silicon layer 241 and on which the gate electrode 242 is formed.

  Further, in the silicon layer 241, a low concentration source region 241b and a high concentration source region 241S are provided on the source side of the channel region 241a, while a low concentration drain region 241c and a high concentration drain are provided on the drain side of the channel region 241a. The region 241D is provided to form a so-called LDD (Light Doped Drain) structure. Among these, the high-concentration source region 241S is connected to the source electrode 243 through a contact hole 243a that opens over the gate insulating layer 282 and the first interlayer insulating layer 283. The source electrode 243 is configured as a part of a power supply line (not shown). On the other hand, the high-concentration drain region 241D is connected to the drain electrode 244 made of the same layer as the source electrode 243 through a contact hole 244a that opens through the gate insulating layer 282 and the first interlayer insulating layer 283.

  A planarization film 284 is formed on the first interlayer insulating layer 283 where the source electrode 243 and the drain electrode 244 are formed. The planarizing film 284 is formed of a heat-resistant insulating resin such as acrylic or polyimide, and eliminates surface irregularities due to the driving thin film transistor 123, the source electrode 243, the drain electrode 244, and the like. It is a known one formed.

  A pixel electrode (anode) 111 is formed on the surface of the planarizing film 284, and the pixel electrode 111 is connected to the drain electrode 244 via a contact hole 111a provided in the planarizing film 284. ing. That is, the pixel electrode 111 is connected to the high concentration drain region 241D of the silicon layer 241 through the drain electrode 244.

Further, on the surface of the planarization film 284 on which the pixel electrode 111 is formed, as shown in FIG. 4, a first partition wall having an opening 25a that covers the peripheral portion of the pixel electrode 111 and exposes the central portion thereof. 25 is formed with a thickness of about 50 nm, for example. The first partition 25 covers the peripheral edge of the pixel electrode 111 and the periphery thereof to partition the pixel electrode 111 and insulate between the adjacent pixel electrodes 111. Silicon oxide such as SiO ₂ , It is formed from a silicon-based insulating material such as silicon nitride or silicon oxynitride. The opening areas of all the openings 25a provided in the first partition wall 25 are equal, and thus the light emitting areas of the respective light emitting elements 3 are also equal.

  Further, a second partition 221 is formed on the first partition 25 with a thickness of about 2 μm, for example. The second partition 221 functions to partition the plurality of light emitting functional layers 110 on the element substrate 2 and has a plurality of openings 221a (see FIG. 3B) for accommodating the light emitting functional layers 110. ing. The opening areas of all the openings 221a provided in the second partition 221 are equal, and thus the thickness of each light emitting functional layer 110 is also equal.

  Specifically, the second partition 221 exposes the edge 25b on the pixel electrode 111 side of the first partition 25, that is, the edge 25b that forms the opening 25a of the first partition 25. Is formed. The second partition 221 is made of a heat-resistant insulating resin such as acrylic or polyimide, and has wettability with respect to the material for forming the light-emitting layer 70 due to lyophilic treatment or lyophobic treatment. Is controlled.

  On the pixel electrode 111, a hole injection / transport layer 60 is formed with a thickness of about 5 nm to 50 nm in the opening 25 a of the first partition wall 25. A light emitting layer 70 is formed in the opening 25 a of the partition wall 25 and in the opening 221 a of the second partition wall 221. That is, the light emitting functional layer 110 is formed on the pixel electrode (anode) 111 by laminating the hole injecting and transporting layer 60 and the light emitting layer 70 in this order from the pixel electrode (anode) 111 side.

In the present embodiment, which is a bottom emission type, the pixel electrode 111 is formed of a translucent conductive material, and specifically, ITO is suitably used. The pixel electrode 111 in the present embodiment has a different area for each color according to the sub-pixel regions 90R, 90G, and 90B shown in FIG. More specifically, it has substantially the same (similar) shape as the sub-pixel region. Therefore, it is not necessary to provide the pixel electrode 111 for each light emitting element 3, and the circuit configuration can be simplified.
The hole injection / transport layer 60 formed on the pixel electrode 111 is selectively formed to correspond to the opening 25a.

  A light emitting layer 70 (70R, 70G, 70B (see FIG. 3B)) is formed on the hole injecting and transporting layer 60 with a thickness of about 100 nm. The light emitting layer 70 is formed using a known light emitting material capable of emitting fluorescence or phosphorescence. As a material for forming the light emitting layer 70, materials that emit light corresponding to each of the red, green, and blue wavelength regions are used, particularly when full color display is performed, and each is formed and arranged in a preset state. .

The cathode 12 is formed so as to cover the light emitting layer 70 as shown in FIG. 4, and is formed, for example, by forming Ca to a thickness of about 5 nm and forming Al thereon to a thickness of about 300 nm. Is. Since the electrode has such a laminated structure, particularly Al functions as a reflective layer. Note that if the cathode 12 is made of a light-transmitting material, the emitted light can be emitted from the cathode side. As the light-transmitting material, ITO, Pt, Ir, Ni, or Pd can be used. The film thickness is preferably about 75 nm in order to ensure translucency, and more preferably thinner than this film thickness.
Further, a sealing substrate (not shown) is stuck on the cathode 12 via an adhesive layer 51.

  Here, the hole injecting and transporting layer 60 in the light emitting functional layer 110 has a function of injecting holes into the light emitting layer 70 and also has a function of transporting holes in the hole injecting and transporting layer 60. . Therefore, by providing such a hole injecting and transporting layer 60 between the pixel electrode 111 and the light emitting layer 70, in the light emitting layer 70, the holes injected from the hole injecting and transporting layer 60 and the cathode 12 are injected. Recombination with the generated electrons causes light emission.

(Method for manufacturing organic EL device)
Next, a method for manufacturing the organic EL device 1 having such a configuration will be described with reference to FIGS. FIG. 5 is a process diagram on the element substrate side of the organic EL device, and FIG. 6 is a process diagram on the sealing substrate (not shown) side of the organic EL device.
First, the circuit element portion 14 is formed on the element substrate 2 in the same manner as in the prior art. Then, a light-transmitting conductive film that becomes the pixel electrode 111 is formed of ITO so as to cover the entire surface of the element substrate 2. Next, the conductive film is patterned to form a pixel electrode 111 that is electrically connected to the drain electrode 244 through the contact hole 111a of the planarization film 284 as shown in FIG.

Next, a silicon-based insulating material such as SiO _{2 is} formed on the pixel electrode 111 and the planarizing film 284 by a CVD method or the like to form a partition layer (not shown) having a thickness of about 50 nm. The partition wall layer is patterned using a known photolithography technique and etching technique. As a result, as shown in FIG. 5B, an opening 25a (not shown) is formed for each pixel region of each light emitting element 3 to be formed, and at the same time, a first partition 25 is formed.

  Next, an organic resin material is formed on the first partition wall 25 and the pixel electrode 111 to form a partition layer (not shown) having a thickness of about 2 μm. Subsequently, a known photolithography technique and etching technique are formed. Is used to pattern the partition wall layer. As a result, as shown in FIG. 5C, the organic resin is exposed with the edge 25b of the first partition wall 25 exposed at a predetermined position on the first partition wall 25, specifically, a position surrounding the pixel region. A second partition 221 made of a material is formed.

Next, as shown in FIG. 6A, a hole injection / transport layer 60 is formed in a region surrounded by the first partition walls 25. In the step of forming the hole injection / transport layer 60, the ink jet method, which is a droplet discharge method, is particularly necessary because it is necessary to selectively dispose the material for forming the hole injection / transport layer 60 in the region surrounded by the second partition 221. Is preferably employed. That is, by this ink jet method, the liquid hole injecting and transporting layer 60 is formed (applied) with a thickness of, for example, about 50 nm in the opening 221a of the second partition 221.
At this time, a material for forming the hole injecting and transporting layer 60 having substantially the same droplet amount (droplet size) is injected into all the openings 221a in the second partition 221. In this manner, the material for forming the hole injecting and transporting layer 60 is applied to each opening 221a with a uniform film thickness.
As a forming material of the hole injecting and transporting layer 60, for example, a material in which a hole injecting and transporting layer forming component is dissolved in an organic solvent is used.

Next, the solvent is removed in vacuum, and the material for forming the hole injecting and transporting layer 60 is heated at 200 ° C. for about 10 minutes to perform heat treatment. Then, by this drying treatment, the organic solvent in the material is vaporized and removed, and a dry film that functions as the hole injection transport layer 60 is obtained by the remaining hole injection transport layer forming component.
Since the application amount (film thickness) of the forming material of the hole injection transport layer 60 in each opening 221a is equal, there is no great difference in the material drying speed (film formation time) for each opening 221a. A dry film can be obtained in substantially the same time. In this manner, the hole injecting and transporting layer 60 having a flat surface and a uniform film thickness is formed in each opening 25a of the first partition wall 25.

Next, as shown in FIG. 6B, the light emitting layer 70 is formed on the hole injecting and transporting layer 60. In the formation process of the light emitting layer 70, as in the formation of the hole injecting and transporting layer 60, an ink jet method which is a droplet discharge method is suitably employed. That is, the material for forming the light emitting layer 70 of each color is sprayed onto the predetermined hole injecting and transporting layer 60 by the ink jet method, and then the solvent is removed in vacuum, and further, at 130 ° C. for 1 hour in N ² atmosphere The light emitting layer 70 (70R, 70G, 70B) is formed in the opening 25a of the first partition 25 and the opening 221a of the second partition 221 by performing a degree of heat treatment.
In this step, the material for forming each light-emitting layer 70 is ejected into each opening 221a with substantially the same amount of droplets regardless of the RGB light-emitting materials, and the material for forming the light-emitting layer 70 is uniformly formed in each opening 221a. Apply by film thickness. As a result, there is no significant difference in the drying speed (film formation time) of the forming material for each opening 221a, and a dry film formation that functions as the light emitting layer 70 can be obtained in substantially the same time. In this way, the light emitting layers 70R, 70G, and 70B having a flat surface and a uniform film thickness are formed in each opening 211a.

Next, as shown in FIG. 6C, for example, lithium fluoride (LiF) is laminated to a thickness of about 5 nm and aluminum (Al) is laminated to a thickness of about 300 nm so as to cover the light emitting layer 70 and the second partition 221. A cathode 12 is formed. Further, in forming the cathode 12, unlike the formation of the hole injecting and transporting layer 60 and the light emitting layer 70, the cathode substrate 12 is not selectively formed only in the pixel region by vapor deposition or sputtering. 2 is formed on substantially the entire surface.
Thereafter, an adhesive layer 51 is formed on the cathode 12, and a sealing substrate (not shown) is further adhered by the adhesive layer 51 to perform sealing. Thereby, the organic EL device 1 of the present embodiment is obtained.

  Therefore, as described above, the substantial area of each sub-pixel can be defined by the number of light-emitting elements 3 shown in FIGS. 3B and 4. The opening areas of the openings 25a of the first partition 25 are all the same, and the weight of the material for forming the light emitting layer 70 disposed in each opening 221a is the same regardless of the color (material). Thereby, the film thickness of each light emitting layer 70 can be made uniform, the light emission nonuniformity between the light emitting elements 3 can be prevented, a color nonuniformity and a lifetime difference can be suppressed, and a light emission characteristic can be improved.

  That is, if there is a variation in the film thickness in the light emitting layer 70, the resistance is reduced and the luminance is increased in the portion where the film thickness is thin, and the luminance life is shortened accordingly. Then, when a part with a partial lifetime occurs in the light emitting layer 70 of each light emitting element 3, it is determined that the luminance of the entire single pixel including the light emitting element 3 is the lifetime. Therefore, if the film thickness is not uniform in the light emitting layer 70, the lifetime of the pixel is shortened as a result.

  However, according to the present invention, since the film thickness in the light emitting layer 70 can be made uniform between the light emitting elements 3 as described above, the light emission characteristics among the plurality of light emitting elements 3 can be made uniform. Since the pixel (sub-pixel) is composed of such an assembly of the light-emitting elements 3, the light emission characteristics between the pixel regions (sub-pixel regions) can be made uniform, and the lifetime as the pixel region (sub-pixel region) Can be lengthened. Thereby, the light emission characteristic of the organic EL device 1 obtained can be improved.

  Therefore, the organic EL device 1 obtained in this way is suitable as a display device that performs full-color display, for example, because the light emission characteristics in the pixel region (sub-pixel region) are uniform.

  Further, when the forming materials of the RGB light emitting layers 70R, 70G, and 70B are arranged on the substrate using the ink jet method, the amount of droplets is the same regardless of the material and the arrangement regularity of each nozzle is the same. Thus, the jetting property is stabilized, and this makes it easy to form a film by the ink jet method.

  In addition, since the light emission lifetime varies depending on the material for forming the light emitting layer 70, the difference in the light emission lifetime in each light emitting layer 70 can be suppressed by increasing the area of the sub-pixel 3 as the color with a shorter light emission lifetime. Furthermore, a desired light emission luminance can be obtained with a low current.

(Example)
An ink jet method was used as a method for forming the hole injection transport layer 60, and red, green, and blue fluorescent materials were used as the material for forming the light emitting layer 70, and this was formed by the ink jet method. Except for this, an organic EL device as a product of the present invention was fabricated in substantially the same manner as in the manufacturing method described above.
However, the hole injection transport layer 60 and the light emitting layer 70 were formed using the following materials.

  The hole injection transport layer 60 is used as a weight ratio (PEDOT: PSS = 1: 50), 3,4-polyethylenedioxythiophene-polystyrene sulfonic acid (PEDOT / PSS) having a solid content concentration of 0.5%, and a solvent. It was formed using a hole injecting and transporting forming material consisting of water added with 50% diethylene glycol.

  After injecting the hole injecting and transporting material into the opening 25a of the first partition wall 25 and the opening 221a of the second partition wall 221 using an inkjet method, the solvent is removed in a vacuum, and 200 Heat treatment was performed at about 10 minutes for about 10 minutes to form a hole injecting and transporting layer 60 having a thickness of about 50 nm.

  On the hole injecting and transporting layer 60, the light emitting layers 70R, 70G, and 70B that emit RGB are formed. Each of the light emitting layers 70R, 70G, and 70B was formed using a forming material made of a fluorescent material showing RGB color as a solute and a forming material made of cyclohexylbenzene at a concentration of 100% as a solvent. Specifically, a forming material having an equal droplet amount (droplet size) is jetted into each opening 221a by using an inkjet method, and the solvent is removed in a vacuum, and further, 130 ° C. in an N 2 atmosphere. Then, a drying process was performed for about 1 hour to form light emitting layers 70R, 70G, and 70B having a film thickness of about 100 nm. In this embodiment, the weights of the respective forming materials injected into the respective openings 221a are made common.

The cathode 12 was formed by depositing 5 nm thick lithium fluoride (LiF) and 300 nm thick aluminum (Al) by vapor deposition so as to cover each of the light emitting layers 70R, 70G, 70B and the second partition 221. .
In this way, the light emitting element 3 having the same light emitting region (opening area of the opening 25a) regardless of the light emission color was configured. In the present embodiment, a plurality of light emitting elements 3 are arranged in a row in each of the sub pixel regions 90R, 90G, 90B, and the number of the light emitting elements 3 is arranged to vary the area of the sub pixel regions 90R, 90G, 90B. It is different. As described above, each of the sub-pixel regions 90R, 90G, and 90B is a rectangular region having a constant short-side length defined by the diameter of the opening 221a and a long-side length depending on the number of light-emitting elements 3. Become.

  Then, the element substrate 2 and the sealing substrate (not shown) were bonded via the adhesive layer 51 on the cathode 12 to perform sealing, and the organic EL device 1 as the product of the present invention was obtained.

(Comparative example)
As a comparative example, a light emitting element including a light emitting layer having a different light emitting region (opening area of the opening) for each color was manufactured. In this comparative example, the area of each sub-pixel region is made different by providing one light-emitting element having a different light-emitting region (opening area of the opening) for each color in each sub-pixel region.

A partition wall for partitioning each light emitting element (subpixel region) was formed on the element substrate, and a light emitting layer and a hole injecting and transporting layer were formed in openings having different opening areas for each color. Note that the hole injecting and transporting layer and the light emitting layer were formed by an inkjet method using the same materials as in the above examples. Since the size of the opening area of each opening is different for each color, each color is formed by spraying a forming material having a different droplet amount (droplet size) into each opening and performing a drying process under the same conditions as in the above embodiment. The light emitting layer was formed. Each sub-pixel region is formed of a rectangular region in which the length ratio in the short side direction and the long side direction is different for each color.
In this manner, light emitting elements having different light emitting regions for respective colors were formed, and an organic EL device as a comparative product was manufactured.

When the organic EL device produced as described above was caused to emit light and the light emission characteristics were examined visually, in the organic EL device of the present invention, no light emission unevenness was observed between the sub-pixels.
On the other hand, in the organic EL device of the comparative example, light emission unevenness was observed between the sub-pixels. Such uneven light emission is considered to be due to the non-uniform thickness of the light emitting layers 70R, 70G, and 70B. The opening area of the opening of the comparative product is different for each RGB, and the weight of the forming material injected into each opening is different. For this reason, since the film thickness of the coating material in each opening is not always uniform, the time required for the drying process varies depending on the material, and the film thickness after drying becomes nonuniform.
From the above results, the organic EL light emitting device 1 according to the present invention can be formed by the above-described method, thereby establishing film forming conditions such as uniformity and flatness of the thickness of the light emitting layer 70. Color unevenness and life variation are suppressed, and light emission characteristics are improved. In addition, since the amount of droplets of the forming material injected into each opening 221a is substantially equal, it was confirmed that film formation by the ink jet method (droplet discharge method) can be performed well and easily.

[Second Embodiment of Organic EL Device]
Next, an organic EL device according to a second embodiment of the present invention will be described. In the following embodiments, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. Here, FIG. 7 is a plan view schematically showing the pixel structure of the organic EL device of the second embodiment.

  The organic EL device 1 according to the first embodiment includes a plurality of light emitting elements 3 having the same light emitting region in each of the sub pixel regions 90R, 90G, 90B, and has an area of each sub pixel region 90R, 90G, 90B. The number of light-emitting elements 3 provided differs depending on the organic EL element according to the second embodiment of the present invention, but the sub-pixel areas 90R, 90G, 90B are included in the sub-pixel areas 90R, 90G, 90B. The difference is that one light-emitting element 3 having a different light-emitting region according to the area is provided.

  As shown in FIG. 7, the organic EL device according to the present embodiment has sub-pixel regions 90R, 90G, and 90B having different sizes for each color, as in the above-described embodiment, and the sub-pixel regions 90R, 90G, and 90B. Inside, one light-emitting element having a different light-emitting region corresponding to the size of each of the sub-pixel regions 90R, 90G, and 90B is provided. In other words, the sizes (areas) of the sub-pixel regions 90R, 90G, and 90B are defined by the light-emitting areas of the light-emitting layers 70R, 70G, and 70B having different light-emitting areas for each RGB.

  The partition provided on the element substrate 2 partitions the light emitting layers 70R, 70G, and 70B, and the openings 221r and 221g having different opening areas depending on colors to correspond to the sub-pixel regions 90R, 90G, and 90B. , 221b are provided for each pixel.

  The width W (opening width) of the opening in each opening 221r, 221g, 221b is substantially uniform in each extending direction, and the opening width of all the openings 221r, 221g, 221b is substantially uniform. ing. Therefore, when each forming material of the light emitting layer is supplied into each of the openings 221r, 221g, and 221b using the ink jet method, the spread of each forming material in the openings 221r, 221g, and 221b is constant in the opening width direction. It becomes.

  As a result, even when the light emitting region is different for each sub-pixel region, the film thickness of the material for forming the light emitting layer 70 in each of the openings 221r, 221g, 221b becomes uniform, and each of the openings 221r, 221g, The difference in the drying speed of the forming material in 221b can be suppressed. Therefore, favorable dry film formation is possible, and the uniformity and flatness of the film thickness of each light emitting layer 70R, 70G, 70B obtained can be ensured.

  In addition, each light emitting layer 70R, 70G, 70B has a longer light emission lifetime depending on the material to be formed (light emission color). The area relationship is such that the light emitting layer 70B> the light emitting layer 70G> the light emitting layer 70R corresponding to the sub-pixel regions 90R, 90G, and 90B, thereby making the light emitting lifetimes of the light emitting layers 70R, 70G, and 70B substantially equal. Is possible.

[Other Embodiments of Organic EL Device]
Next, another embodiment of the organic EL device will be described.
In the following embodiments, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. Here, FIGS. 8 to 13 are plan views schematically showing a pixel structure of an organic EL device according to another embodiment.
In the organic EL devices shown in FIGS. 8 to 13, the sizes of the sub-pixel regions 90R, 90G, and 90B are different depending on colors. Specifically, the sub-pixel regions 90R and 90G have substantially the same area. The area of the region 90B is larger. In the following description, each sub-pixel region 90R, 90G, 90B in each organic EL device is represented by one rectangular region or a plurality of rectangular regions. The length of the rectangular region in the short direction is constant, and the areas of the sub-pixel regions 90R, 90G, and 90B are made different by changing the length in the longitudinal direction.

  In the organic EL device shown in FIG. 8, the sub-pixel regions 90 </ b> R and 90 </ b> G are each composed of a rectangular region having substantially the same size (length in the longitudinal direction), and each longitudinal direction is along the signal line 102. On the other hand, the sub-pixel region 90 </ b> B is composed of a plurality (two) of rectangular regions having different sizes (lengths in the longitudinal direction), and the longitudinal directions of the sub-pixel regions 90 </ b> B are along the scanning line 101 or the signal line 102. In addition to being orthogonal to each other, it has a substantially L shape in plan view in which one end side in the longitudinal direction is abutted with each other.

  In the organic EL device shown in FIG. 9, the sub-pixel regions 90 </ b> R and 90 </ b> G are each composed of a rectangular region having substantially the same size (length in the longitudinal direction), and each longitudinal direction is along the signal line 102. On the other hand, the sub-pixel region 90B is composed of a plurality (two) of rectangular regions having different sizes (longitudinal lengths), and the longitudinal direction is at the center of one rectangular region along the scanning line 101. The longitudinal direction is substantially T-shaped in a plan view in which one end side in the longitudinal direction of the other rectangular region along the signal line 102 is abutted.

  In the organic EL device shown in FIG. 10, the sub-pixel regions 90 </ b> R and 90 </ b> G are each composed of a rectangular region having substantially the same size (length in the longitudinal direction), and each longitudinal direction is along the signal line 102. On the other hand, the sub-pixel region 90B is composed of a plurality of (for example, two) rectangular regions whose sizes (lengths in the longitudinal direction) are substantially equal, and a rectangular region whose longitudinal direction is along the scanning line 101 and the longitudinal direction. Is a substantially cross-shaped shape in plan view that intersects the rectangular region along the signal line 102 at the center in the longitudinal direction of each other.

  In the organic EL device shown in FIG. 11, the sub-pixel regions 90 </ b> R and 90 </ b> G are each composed of a rectangular region having substantially the same size (length in the longitudinal direction), and each longitudinal direction is along the signal line 102. On the other hand, the sub-pixel region 90B is composed of a plurality of (for example, three) rectangular regions having different sizes (lengths in the longitudinal direction), and the longitudinal direction extends longitudinally on both ends of the rectangular region along the signal line 102. The direction is substantially H-shaped in a plan view in which the central part of the rectangular region along the scanning line 101 is abutted.

  In the organic EL device shown in FIG. 12, the sub-pixel regions 90 </ b> R and 90 </ b> G are each composed of a rectangular region having substantially the same size, and each longitudinal direction is along the signal line 102. On the other hand, the sub-pixel region 90B is composed of a plurality of (for example, three) rectangular regions having different sizes (lengths in the longitudinal direction), and the longitudinal direction is a rectangular region along the signal line 102 and the longitudinal direction is scanned. It has a substantially U shape in plan view in which ends of a pair of rectangular regions along the line 101 are connected to each other.

  In the organic EL device shown in FIG. 13, the sub-pixel regions 90 </ b> R and 90 </ b> G are each composed of a rectangular region having substantially the same size, and each longitudinal direction is along the signal line 102. On the other hand, the sub-pixel region 90B is composed of a plurality of (for example, three) rectangular regions having different sizes (lengths in the longitudinal direction), and the rectangular region whose longitudinal direction extends along the signal line 102 and the rectangular region. One end side of a pair of rectangular regions whose longitudinal direction is along the scanning line 101 is connected to both ends of the shape region.

In the organic EL device shown in FIGS. 8 to 13 described above, the light-emitting element 3 in which the light-emitting regions are different in the sub-pixel regions 90R, 90G, and 90B so as to correspond to the areas of the sub-pixel regions 90R, 90G, and 90B. Are provided one by one, thereby constituting a display unit pixel (pixel region) made of RGB.
A partition wall (not shown) of each organic EL device is integrally formed so as to surround each light emitting layer 70R, 70G, 70B, and has an opening width (rectangular region) between the sub pixel regions 90R, 90G, 90B. Of the sub-pixel regions 90R, 90G, and 90B by changing the opening length (longitudinal direction length of the rectangular region). The areas are different.
Therefore, when each light emitting layer 70 is formed by the ink jet method, the forming material injected into each opening portion spreads uniformly in the opening width direction (short direction of the rectangular region). Thereby, the forming material can be applied with a uniform film thickness in each opening, and when the light emitting layers 70R, 70G, and 70B are obtained by the drying process, the drying speed of the forming material becomes substantially equal. Therefore, favorable dry film formation is possible, and the film surfaces of the light emitting layers 70R, 70G, and 70B in each opening can be flattened. Light emission characteristics can be obtained.
In the organic EL device shown in FIGS. 7 to 13 described above, the shapes of the openings 221r, 221g, and 221b are rectangular. However, as shown in FIG. Good.

  Each of the organic EL devices described above includes a partition wall (not shown) integrally formed so as to surround the plurality of light emitting layers 70. In the organic EL device described below, the second partition 221 is configured to include a plurality of substantially rectangular frame-shaped banks in plan view, and the banks are arranged on the element substrate 2 at a predetermined pitch. It has become. Each of the light emitting layers 70R, 70G, and 70B partitioned by the partition 221 is formed such that one of the light emitting layers 70B has a lattice shape and surrounds the other light emitting layers 70R and 70G. Specifically, as shown in FIG. 15, the light emitting layer 70B has a lattice shape, and the light emitting layers 70R and 70G are arranged in a region surrounded by the light emitting layer 70B.

  Each sub-pixel region is formed of a rectangular region as indicated by a one-dot chain line in the figure, and the light-emitting element 3 having the light-emitting layers 70R and 70G is provided in the sub-pixel regions 90R and 90G. In the sub-pixel region 90B, the light emitting element 3 formed using a part of the light emitting layer 70B is provided.

  The end portion of the light emitting layer 70 is easily deformed in cross section due to the influence of the partition 221. That is, the forming material of each light emitting layer 70 filled in the openings 221r, 221g, and 221b may spread on the wall portion that forms the openings 221r, 221g, and 221b of the partition wall 221 and rise along the wall surface. There is. Therefore, as in the organic EL device shown in FIG. 15, the light emitting layer 70B is formed in a lattice shape and is configured to surround the other light emitting layers 70R and 70G, thereby opening 221r that divides the longitudinal direction of the light emitting layer 70B. Is not located in the sub-pixel region 90B, the surface of the light emitting layer 70B can be further flattened. Thereby, good light emission luminance can be obtained, and the light emission characteristics of the light emitting element can be improved.

  The preferred embodiments according to the present invention have been described above with reference to the accompanying drawings. However, it goes without saying that the present invention is not limited to such examples, and the above embodiments may be combined. It is obvious for those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs to.

(Electronics)
Next, an example of an electronic apparatus including the organic EL device according to the embodiment will be described.
FIG. 16A is a perspective view showing an example of a mobile phone. In FIG. 16A, reference numeral 50 denotes a mobile phone body, and reference numeral 51 denotes a display unit including an organic EL device.
FIG. 16B is a perspective view illustrating an example of a portable information processing apparatus such as a word processor or a personal computer. In FIG. 16B, reference numeral 60 denotes an information processing apparatus, reference numeral 61 denotes an input unit such as a keyboard, reference numeral 63 denotes an information processing body, and reference numeral 62 denotes a display unit including an organic EL device.
FIG. 16C is a perspective view illustrating an example of a wristwatch type electronic device. In FIG. 16C, reference numeral 70 denotes a watch body, and reference numeral 71 denotes an EL display unit including an organic EL device.
Since the electronic devices shown in FIGS. 16A to 16C are provided with the organic EL device described in the previous embodiment, the electronic devices have good display characteristics.

  In addition, as an electronic device, it is not restricted to the said electronic device, It can apply to a various electronic device. For example, a desktop computer, a liquid crystal projector, a multimedia personal computer (PC) and an engineering workstation (EWS), a pager, a word processor, a television, a viewfinder type or a monitor direct view type video tape recorder, an electronic notebook, an electronic The present invention can be applied to electronic devices such as a desktop computer, a car navigation device, a POS terminal, and a device having a touch panel.

  The preferred embodiments according to the present invention have been described above with reference to the accompanying drawings. However, it goes without saying that the present invention is not limited to such examples, and the above embodiments may be combined. It is obvious for those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs to.

For example, in the above embodiment, each sub-pixel region 90R, 90G, and 90B is composed of one or a plurality of rectangular regions, but the end of the region is rounded in the rectangular region. An elliptical region and the like are also included.
The width W of the opening 221a preferably corresponds to the droplet size of the material for forming each light emitting layer 70 ejected by the ink jet method.

It is explanatory drawing which shows the wiring structure of the organic electroluminescent apparatus of this embodiment of this invention. It is a top view which shows typically the structure of the organic electroluminescent apparatus in 1st Embodiment of this invention. It is a top view which shows typically the pixel structure of the organic electroluminescent apparatus in 1st Embodiment of this invention. It is sectional drawing of the principal part of the organic electroluminescent apparatus in 1st Embodiment of this invention. It is process drawing by the side of the element substrate of the organic EL device in a 1st embodiment of the present invention. It is process drawing by the side of the sealing substrate of the organic electroluminescent apparatus in 1st Embodiment of this invention. It is a top view which shows typically the pixel structure of the organic electroluminescent apparatus in 2nd Embodiment of this invention. It is a top view which shows typically the pixel structure of the organic electroluminescent apparatus in other embodiment of this invention. It is a top view which shows typically the pixel structure of the organic electroluminescent apparatus in other embodiment of this invention. It is a top view which shows typically the pixel structure of the organic electroluminescent apparatus in other embodiment of this invention. It is a top view which shows typically the pixel structure of the organic electroluminescent apparatus in other embodiment of this invention. It is a top view which shows typically the pixel structure of the organic electroluminescent apparatus in other embodiment of this invention. It is a top view which shows typically the pixel structure of the organic electroluminescent apparatus in other embodiment of this invention. It is a top view which shows typically the pixel structure of the organic electroluminescent apparatus in other embodiment of this invention. It is a figure which shows the electronic device in embodiment of this invention. It is sectional drawing which shows the structure of the conventional organic EL apparatus typically.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Organic EL apparatus 2 ... Element board | substrate 3 ... Light emitting element 25 ... 1st partition 70 (70R, 70G, 70B) ... Light emitting layer 90R, 90G, 90B ... Sub-pixel area | region 221 ... 2nd partition 221a ... Opening part a , B, c, d ... rectangular area

Claims (7)

On the substrate, pixel regions composed of a plurality of sub-pixel regions having different display colors are arranged in a matrix,
A plurality of light-emitting layers having different emission colors for each of the sub-pixel regions;
Partition walls for partitioning the plurality of light emitting layers, and in the pixel region,
At least one of the plurality of sub-pixel regions constituting the pixel region is different in area from the other sub-pixel regions,
The plurality of sub-pixel regions are configured by one rectangular region or a plurality of rectangular regions connected so that their longitudinal directions intersect each other. The partition has a plurality of openings having the same opening area,
2. The organic electroluminescence device according to claim 1, wherein at least one of the sub-pixel regions constituting the pixel has a different number of the openings from other sub-pixel regions. The partition has a plurality of openings corresponding to the sub-pixel regions,
2. The organic electroluminescence device according to claim 1, wherein the opening widths of the openings are substantially equal.   The organic electroluminescence device according to any one of claims 1 to 3, wherein the partition wall is integrally formed so as to surround the plurality of light emitting layers.   4. The light emitting layer corresponding to one of the plurality of light emitting layers has a lattice shape and surrounds a light emitting layer corresponding to another light emitting color. 5. The organic electroluminescence device according to Item.   The organic electroluminescent device according to claim 1, wherein the area of the light emitting layer is increased as the color has a shorter light emission lifetime.   An electronic apparatus comprising the organic electroluminescence device according to any one of claims 1 to 6.

Images