JP2010040507A - Organic el display device, and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a full color organic EL display device having a long lifetime and high definition. <P>SOLUTION: This full color organic EL display device has pixels composed of two sub-pixels in which organic EL elements are laminated. The first organic compound layer of the pixel is formed as a layer common to the adjoining sub-pixels of the adjoining pixels, and the second organic compound layer is formed as a layer common to the adjoining sub-pixels of the adjoining pixels on the opposite side. Furthermore, the third organic compound layer is formed as a layer common to all pixels. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an organic EL display device using an organic EL element as a display element and a manufacturing method thereof.

  An organic EL element using electroluminescence (hereinafter referred to as EL) of an organic material has an organic compound layer such as an organic carrier transport layer and an organic light emitting layer between an anode and a cathode, and is driven by a low voltage direct current drive. It attracts attention as a light emitting element capable of emitting light with high luminance.

  In a display device using such an organic EL element as a display element (hereinafter referred to as an organic EL display device), an active matrix provided with a thin film transistor (hereinafter referred to as TFT) for driving the organic EL element for each pixel. The type of organic EL display device has been particularly developed from the viewpoint of high image quality and long life.

  In general, such an organic EL display device adopts a configuration in which pixels composed of sub-pixels that independently emit light are arranged for each of red, green, and blue (three-color independent light-emitting method). As a manufacturing method of a full-color organic EL display device using a three-color independent light emitting method, a method of arranging a shadow mask on a substrate and patterning each light emitting layer by vapor deposition is widely used.

  However, if such a full-color organic EL display device is to be made high-definition as a small monitor such as a mobile phone or a camera, the light emission area of one subpixel becomes small, and each subpixel must be driven with high luminance. Don't be. Therefore, the deterioration of the organic EL element is accelerated, and it is difficult to extend the life of the display device.

  Therefore, Patent Document 1 proposes an organic EL display device that increases the light emission area of one sub-pixel by stacking organic EL elements. Specifically, a subpixel in which an organic EL element that emits blue light is stacked on an organic EL element that emits green light, and a subpixel in which an organic EL element that emits blue light is stacked on an organic EL element that emits red light. One pixel is composed of two sub-pixels with the pixel.

Japanese Patent Laid-Open No. 2005-174639

  For example, in the case of an organic EL display device having a VGA resolution of about 3 inches diagonal, it is 250 ppi or more, and the pitch of one pixel is about 100 μm. And when one pixel is comprised from two subpixels by which two organic EL elements are laminated | stacked like patent document 1, the pitch of 1 subpixel will be about 50 micrometers.

  When an element constituting such a pixel of an organic EL display device is formed in a sub-pixel unit with a shadow mask having a stripe pattern, the opening width of the mask is about 50 μm, and the rib width between the openings is also about 50 μm. Become. Such a shadow mask with a narrow rib width has a reduced rigidity, which causes problems such as deformation due to heat during deposition and a decrease in film forming accuracy.

  An object of the present invention is to provide a long-life and high-definition full-color organic EL display device.

  In order to solve the above problem, a first layer composed of a first organic compound layer and a second organic compound layer arranged side by side in the same plane in a pixel composed of two subpixels, and the first layer And a second layer including a third organic compound layer, wherein each of the first organic compound layer and the second organic compound layer is an adjacent pixel. The organic EL display device is characterized in that it is formed as a common layer between adjacent sub-pixels, and the third organic compound layer is formed as a common layer among all pixels.

  In addition, a first layer composed of a first organic compound layer and two organic compound layers arranged side by side in the same plane in a pixel composed of two subpixels, and a third layer stacked on the first layer A method of manufacturing an organic EL display device comprising: a second layer including an organic compound layer, wherein the step of forming the first layer includes the first organic common between adjacent subpixels of adjacent pixels. A step of forming a compound layer and a step of forming the second organic compound layer that is common between adjacent sub-pixels of adjacent pixels, and the step of forming the second layer is performed between all pixels. A method for producing an organic EL display device, comprising the step of forming the third organic compound layer that is common to the first and second organic compound layers.

  According to the present invention, it is possible to provide a long-life and high-definition full-color organic EL display device.

(A) A schematic plan view of the organic EL display device according to the first embodiment of the present invention, (b) a schematic cross-sectional view corresponding to the AA ′ line in (a), and (c) a BB ′ line. Corresponding schematic diagram Process flow diagram of organic EL display device according to first embodiment of the present invention Shadow mask applicable to organic EL display device according to the present invention and conventional mask outline diagram (A) The figure of the drive circuit of the organic electroluminescence display which concerns on the 1st Embodiment of this invention, (b) An example of the voltage waveform applied between the electrodes of each organic EL element by the drive circuit shown by (a) Figure showing (A) A schematic plan view of an organic EL display device according to a second embodiment of the present invention, (b) a schematic cross-sectional view corresponding to the AA ′ line in (a), and (c) a BB ′ line. Corresponding schematic diagram (A) A schematic plan view of an organic EL display device according to a third embodiment of the present invention, (b) a schematic cross-sectional view corresponding to the AA ′ line in (a), and (c) a BB ′ line. Corresponding schematic diagram (A) The figure of the drive circuit of the organic electroluminescent display apparatus which concerns on the 3rd Embodiment of this invention, (b) An example of the voltage waveform applied between the electrodes of each organic EL element by the drive circuit shown by (a) Figure showing (A) A schematic plan view of an organic EL display device according to a fourth embodiment of the present invention, (b) a schematic cross-sectional view corresponding to the AA ′ line in (a), and (c) a BB ′ line. Corresponding schematic diagram

  An embodiment of an organic EL display device according to the present invention will be described with reference to the drawings. In addition, the well-known or well-known technique of the said technical field is applied to the part which is not illustrated or described in particular in this specification. The embodiment described below is one form of the invention and is not limited thereto.

(First embodiment)
One mode of a high-definition (for example, 270 ppi having a diagonal size of 3 inches) will be described.

  1A is a plan view of the organic EL display device of the present embodiment, and FIGS. 1B and 1C are cross-sectional views taken along the line AA ′ as viewed from the arrows in FIG. , BB 'sectional drawing. 100 is an insulating substrate, 101 is a lower electrode, 102 is a partition, 103a is a first organic compound layer, 103b is a second organic compound layer, 104 is an intermediate electrode, 103c is a third organic compound layer, and 105 is an upper portion The electrode is shown. FIG. 2 shows a process flow of the present embodiment, and FIG. 3 shows a partial view of a shadow mask used in the present embodiment.

  As shown in FIG. 1A, in the organic EL display device according to this embodiment, a plurality of pixels each including two subpixels (a first subpixel and a second subpixel) are arranged in a matrix. . One row consists of (P (1,1), P (1,2)), (P (2,1), P (2,2)) ... (P (n, 1), P (n, 2)) 2n sub-pixels. n is a natural number representing the number of columns of pixels, and is 640 here. As shown in FIG. 1C, on the insulating substrate 100 on which the TFT drive circuit 107 is formed, a planarization film 108 is formed, and a contact hole 106a is formed. As the material for the planarizing film 108, a resin material such as polyimide resin or acrylic resin is preferably used. Further, a lower electrode layer is formed on the planarizing film 108 and connected to the TFT driving circuit 107 through the contact hole 106a.

  The lower electrode 101 is preferably a light-reflective member, and is preferably made of a material such as Cr, Al, Ag, Au, or Pt. This is because the higher the reflectance, the higher the light extraction efficiency from the upper surface. In consideration of the carrier injection property to the organic compound layer, an oxide transparent conductive layer such as ITO or IZO may be stacked to form a two-layer structure.

  The lower electrode layer formed on the planarization film 108 is patterned by photolithography according to the regions of the first subpixel and the second subpixel in the pixel, and becomes the lower electrode 101. Further, a contact hole 106 c is formed in the planarization film 108. Next, the material of the partition wall 102 is applied by spin coating and patterned by photolithography to form subpixel openings and contact holes 106c. The partition wall 102 covers a step caused by the lower electrode 101 and prevents a step formed by the lower electrode 101 in a film formed thereafter. A resin material such as polyimide resin or acrylic resin is preferably used as the material of the partition wall 102.

  A first layer including the first organic compound layer 103a and the second organic compound layer 103b is formed on the substrate formed as described above. The thickness of the organic compound layer is preferably about 0.05 μm to 0.3 μm, and preferably about 0.05 to 0.15 μm.

  Each organic compound layer has a light emitting material, and can be selected from at least one selected from a hole injection material, an electron injection material, a hole transport material, and an electron transport material. Each organic compound layer may be formed by laminating a plurality of materials among the above materials.

  Examples of light emitting materials include triarylamine derivatives, stilbene derivatives, polyarylenes, aromatic condensed polycyclic compounds, aromatic heterocyclic compounds, aromatic heterocondensed ring compounds, metal complex compounds, and the like, and single or composite oligos thereof. Can be used. As the hole injection material and the transport material, phthalocyanine compounds, triarylamine compounds, conductive polymers, perylene compounds, Eu complexes, and the like can be used. As the electron injection material and the transport material, Alq3 in which a trimer of 8-hydroxyquinoline is coordinated to aluminum, an azomethine zinc complex, a distyrylbiphenyl derivative system, or the like can be used.

  The first organic compound layer 103a and the second organic compound layer 103b are formed by the vacuum evaporation method in the same plane using the shadow mask having the stripe-shaped opening of FIG. According to the prior art, the rib width of the shadow mask is only the width of one subpixel as shown in FIG. 3A. For example, in the case of a 270 ppi full-color organic EL display device having a diagonal size of 3 inches, 47 μm. However, the rib width of the shadow mask according to the present invention can be as wide as two sub-pixels as shown in FIG. Specifically, in the case of a 270 ppi full-color organic EL display device having a diagonal size of 3 inches, the rib width is 94 μm, and the rigidity and opening accuracy of the mask can be improved as compared with the conventional case.

  Using the above shadow mask, the first organic compound layer 103a is formed as a common layer between adjacent subpixels between adjacent pixels in the same pixel. Further, the second organic compound layer 103b is formed as a common layer between adjacent subpixels of adjacent pixels on the side opposite to the adjacent pixels. That is, as shown in FIG. 1A, the first organic compound layer 103a includes P (1,2), P (2,1), P (3,2),... P (2k-1, 2). ), P (2k, 1),... The second organic compound layer 103b includes P (1,1), P (2,2), P (3,1),... P (2k-1,1), P (2k, 2). ,... Are formed in sub-pixel columns. Here, k is a natural number and 2k ≦ n = 640. The first organic compound layer 103a extends as a common layer to one of two subpixels that constitute a pixel adjacent to the first subpixel, and the second organic compound layer 103b includes the second subpixel. Extends as a common layer to one of the two sub-pixels constituting the adjacent pixel. At this time, a common layer between adjacent subpixels between adjacent pixels is formed using the same opening of the shadow mask. The light emitting region of the first layer including the first organic compound layer 103a and the second organic compound layer 103b depends on the area in contact with the lower electrode 101 of the first organic compound layer 103a and the second organic compound layer 103b. It is prescribed.

  The first organic compound layer 103a and the second organic compound layer 103b of this embodiment are formed by sequentially stacking a hole injection layer, a light emitting layer, an electron transport layer, and an electron injection layer. Examples of combinations of materials include N, N′-α-dinaphthylbenzidine (α-NPD) for the hole transport layer, phenanthroline compound for the electron transport layer, cesium carbonate (0.9 vol%) and phenanthroline for the electron transport layer. Compounds can be used. In addition, a coumarin dye (1.0 vol%) that emits green light and tris [8-hydroxyquinolinate] aluminum (Alq3) can be formed in the light emitting layer of the first organic compound layer 103a. A perylene dye (1.0 vol%) and tris [8-hydroxyquinolinate] aluminum (Alq3) can be formed as a blue light-emitting layer in the second organic compound layer 103a.

  Next, a contact hole 106c is formed in the first organic compound layer 103a and the second organic compound layer 103b. As a forming means, a laser processing method is preferable, and a method generally used for thin film processing such as a YAG laser (including SHG and THG), an excimer laser can be used. These laser beams are scanned with being reduced to several μm, or are irradiated on the substrate in a predetermined pattern through a mask that transmits the contact hole portion as a planar light source. The diameter of the contact hole is preferably 2 μm to 15 μm.

  Next, the intermediate electrode 104 is formed on the entire surface of the pixel formation region while masking only the periphery of the pixel formation region. For film formation, sputtering, vacuum deposition, ion plating, CVD, or the like can be used. A transparent conductive film with high translucency is preferable as the material of the intermediate electrode 104, and ITO, IZO, and ZnO are applicable. Alternatively, a semi-transmissive film may be applied by forming a thin material such as Cr, Al, Ag, Au, or Pt to a thickness of about 2 nm to 50 nm.

  Next, in order to obtain a contact between the upper electrode 105 and the contact hole 106c, the region where the contact hole 106c is formed in the intermediate electrode 104 is patterned. This patterning is preferably performed by laser processing.

  Subsequently, a second layer including the third organic compound layer 103c is formed as a layer common to all pixels by performing a vapor deposition method by masking only the periphery of the pixel formation region. That is, the third organic compound layer 103c is formed so as to extend as a common layer for all pixels. For this reason, since it is not necessary to perform patterning corresponding to each sub-pixel using a mask, manufacturing is facilitated. The third organic compound layer 103c has an electron injecting layer, an electron transporting layer, an organic light emitting layer, a positive organic layer, and a positive electrode so as to have a laminated structure opposite to the laminated structure of the first organic compound layer 103a and the second organic compound layer 103b. The hole injection layers are stacked in this order. The first subpixel includes a first organic compound layer 103a and a third organic compound layer 103c, and the second subpixel includes a second organic compound layer 103b and a third organic compound layer. 103c are stacked. As the third organic compound layer 103c, for example, an Ir complex (18 vol%) and 4,4′-N, N′-dicarbazole-biphenyl (CBP), which are red light-emitting layers, can be formed. As described above, the first organic compound layer, the second organic compound layer, and the third organic compound layer emit different colors. Thereafter, a laser processing method can be used for the contact hole 106c as described above. Next, the upper electrode 105 is patterned and formed according to the pixel region, and is electrically connected to the TFT drive circuit via the contact hole 106c. As described above, the second layer is formed as a layer common to all pixels. However, since the upper electrode 105 is formed by patterning for each pixel, the region where the third organic compound layer 103c emits light is the third region. It can be defined by the area where the organic compound layer 103c and the upper electrode 105 are in contact with each other. For the upper electrode 105, a transparent conductive material, a translucent layer having a thickness of 2 nm to 50 nm made of a single metal such as aluminum, silver, magnesium, calcium, or an alloy thereof can be used. In particular, when the upper electrode 105 and the electron injection layer are in contact with each other, an alloy of silver and magnesium (silver magnesium) is preferable from the viewpoint of the reflectance of light emission and the electron injection property. When the upper electrode 105 is formed of a metal material, patterning can be performed with an excimer laser. If patterning is performed by laser ablation, the distance between the electrodes can be reduced, and the distance between the pixels can be reduced. For this reason, the light emission area of one subpixel can be enlarged.

  Finally, the organic EL element is sealed. For example, in a glove box substituted with dry nitrogen and maintained at a dew point of −70 ° C. or lower, a glass sealing cap (not shown) previously coated with an ultraviolet curable resin and a substrate on which film formation has been completed are arranged on the outer periphery of the pixel formation region Paste at the part. Then, the panel is completed by irradiating the application part of the ultraviolet curable resin with ultraviolet rays and curing the resin. In addition, a sealing method in which the entire element is covered with an inorganic protective film made of SiN or the like, or a protective film in which an inorganic layer and an organic compound layer are stacked can also be used.

  One mode of the driving method of the organic EL display device having the above structure will be described with reference to FIG. FIG. 4A is a schematic diagram of a drive circuit of the organic EL display device shown in FIG. FIG. 4B is a diagram showing an example of a voltage waveform applied between the electrodes of the organic EL display device by the drive circuit shown in FIG.

  In the present embodiment, the third organic compound layer 103c is stacked so that the flow directions of electrons and holes are opposite to the first organic compound layer 103a and the second organic compound layer 103b. . The intermediate electrode 104 is a common electrode and is connected to Vc in FIG. The lower electrode 101 and the upper electrode 105 are connected to the drive circuit in FIG. 4A through contact holes 106a and 106c. That is, the first organic EL element 301a including the first organic compound layer 103a, the second organic EL element 301b including the second organic compound layer 103b, and the third organic EL including the third organic compound layer 103c. The element 301c is connected as shown in FIG.

  Each organic EL element is connected to data lines data_11, data_12, data_13... Data_n1, data_n2, data_n3, and control lines Pulse1 and Pulsea. Each data line gives a video signal of a light emission period to each organic EL element, and the control line switches charging of the capacitor C1 and energization to the organic EL element. Here, n in data_n1 represents a pixel column number, and 1 represents a first organic EL element.

  During the period from T1 to T2 shown in FIG. 4B, the signal corresponding to the video signal of the data lines data_n1, data_n2, and data_n3 is charged to the capacitor C1 in response to the signal of the control line Pulse1, and each organic EL element is charged. The light emission period is programmed.

  During a period from T3 to T4, a signal current flows from the capacitor C1 to each organic EL element in response to a signal from the control line Pulsea, and light is emitted.

  In the present embodiment, the light emitting region of the first layer is defined by the area where the first layer and one of the upper electrode 105 and the lower electrode 101, that is, the lower electrode 101 is in contact. The light emitting region of the second layer is defined by the area where the second layer is in contact with the other electrode, that is, the upper electrode 105. Thereby, even if the second layer is a layer common to all the pixels, it is possible to define the light emission region of the sub-pixel or pixel.

  Furthermore, although the upper electrode 105 is formed so as to continuously cover each pixel, that is, two subpixels, it may be formed so as to be formed for each subpixel and driven for each subpixel.

  According to this embodiment, a rigid shadow mask as shown in FIG. 3B can be used, and a high-definition full-color organic EL display device can be formed by vapor deposition. Furthermore, since the second layer is formed as a common layer for all pixels, the process can be simplified.

(Second Embodiment)
FIG. 5A is a plan view of the organic EL display device of the present embodiment, FIGS. 5B and 5C are cross-sectional views taken along the line AA ′ as seen from the arrows in FIG. It is BB 'sectional drawing.

  In the present embodiment, the second layer including the third organic compound layer 103c and the second layer including the first organic compound layer 103a and the second organic compound layer 103b are compared with the first embodiment. The difference is that the stacking order is reversed. Accordingly, the third organic compound layer 103c is stacked on the hole injection layer, the organic light emitting layer, the electron transport layer, and the electron injection layer, and the first organic compound layer 103a and the second organic compound layer 103b are electron injection layers. And an electron transport layer, an organic light emitting layer, and a hole injection layer. Further, the light emitting region of the second layer is defined by the area in contact with the lower electrode 101 of the second layer, and the light emitting region of the first layer is defined by the area of contact with the upper electrode 105 of the first layer.

  In addition, since the partition wall 102 for preventing film breakage is unnecessary at the boundary between the first organic compound layer 103a and the second organic compound layer 103b, the partition wall 102 is provided only at the boundary for each pixel. Yes.

  Other than that, the organic EL display device can be formed by the same method as in the first embodiment in terms of materials, manufacturing method, and driving method.

  According to this embodiment, a rigid shadow mask as shown in FIG. 3B can be used, and a high-definition full-color organic EL display device can be formed by vapor deposition.

(Third embodiment)
6A is a plan view of the organic EL display device of this embodiment, FIG. 6B and FIG. 6C are AA ′ cross-sectional views as seen from the arrows in FIG. It is BB 'sectional drawing.

  This embodiment is different from the first embodiment in that the third organic compound layer 103c is laminated in the order of a hole injection layer, a light emitting layer, an electron transport layer, and an electron injection layer. That is, the third organic compound layer 103c has the same stacked structure as the first organic compound layer 103a and the second organic compound layer 103b. Furthermore, the lower electrode 101 and the upper electrode 105 are formed as a common layer between all the pixels, and the intermediate electrode 104 is formed by patterning corresponding to the sub-pixel. That is, the light emitting regions of the first layer and the second layer are defined by the intermediate electrode 104. Thereby, compared to the first and second embodiments, the contact hole formed in one pixel can be reduced to half.

  Since this embodiment is different from the first embodiment in the drive circuit and the drive method, it will be described later. Further, since the manufacturing method can be the same as that of the first embodiment, the detailed description is omitted. However, when the intermediate electrode 104 is formed of the above-described metal material, it is patterned by laser ablation. Can do. Further, when the intermediate electrode 104 is formed of a metal material, the intermediate electrode 104 is configured to transmit light emitted from the first organic compound layer 103a and the second organic compound layer 103b or light emitted from the third organic compound layer 103c. The electrode 104 is composed of a metal thin film. When the thickness of the metal thin film is 30 nm or less, the third organic compound layer 103c is not cut at the pattern step of the intermediate electrode 104, and the partition wall 102 does not need to be formed.

  An example of the driving method of the organic EL display device of this embodiment will be described with reference to FIG. FIG. 7A is a schematic diagram of a drive circuit of the organic EL display device shown in FIG. FIG. 7B is a diagram showing an example of a voltage waveform applied between the electrodes of the organic EL device by the drive circuit shown in FIG.

  In the present embodiment, the third organic compound layer 103c is laminated so that electrons and holes flow in the same direction with respect to the first organic compound layer 103a and the second organic compound layer 103b. Here, the lower electrode 101 and the upper electrode 105 are electrodes common to all the pixels, and are connected to Vc in FIG. The intermediate electrode 104 is connected to the drive circuit in FIG. 7A via contact holes 106a and 106b.

  The first organic EL element 301a includes the lower electrode 101, the first organic compound layer 103a, and the intermediate electrode 104, and the second organic EL element 301b includes the lower electrode 101, the second organic compound layer 103b, and the intermediate electrode 104. Consists of The third organic EL element 301 c includes the intermediate electrode 104, the third organic compound layer 103 c, and the upper electrode 105.

  Data lines data_11, data_12, data_13... Data_n1, data_n2, data_n3, and control lines Pulse1, Pulse1, Pulsea, and Pulseb are connected to each organic EL element. Each data line gives a video signal of a light emission period to each organic EL element, and the control line switches charging of the capacitor and energization to the organic EL element.

  In the period from T1 to T2 shown in FIG. 7B, the signal on the control line Pulse1 is received, and the electric charge according to the video signal from each data line data_n1, data_n2 is charged to the capacitor C1. Thereby, the light emission periods of the first organic EL element 301a and the second organic EL element 301b are programmed. At this time, Va = Vcc and Vc = Gnd.

  In the period from T2 to T3, the signal of the control line Pulse2 is received, the electric charge according to the video signal from the data line data_n3 is charged to the capacitor C2, and the light emission period of the third organic EL element 301c is programmed. At this time, Va = Gnd and Vc = Vcc.

  In the period from T3 to T4, Va = Vcc and Vc = Gnd are set. Upon receiving the signal of the control line Pulsea, a signal current flows from the capacitor C1 to the first organic EL element 301a and the second organic EL element 301b to emit light. .

  In the period from T4 to T5, Va = Gnd and Vc = Vcc are set, the signal of the control line Pulseb is received, the signal current flows from the capacitor C2 to the third organic EL element 301c, and light is emitted.

  According to the present embodiment, it is possible to form a high-definition full-color organic EL display device using a rigid shadow mask as shown in FIG.

(Fourth embodiment)
FIG. 8A is a plan view of the organic EL display device of this embodiment, FIG. 8B and FIG. 8C are AA ′ cross-sectional views as seen from the arrows in FIG. It is BB 'sectional drawing. In the present embodiment, the second layer including the third organic compound layer 103c and the second layer including the first organic compound layer 103a and the second organic compound layer 103b are compared with the third embodiment. The difference is that the stacking order is reversed. Therefore, the second layer including the third organic compound layer 103c is sandwiched between the lower electrode 101 and the intermediate electrode 104, and the first layer composed of the first organic compound layer 103a and the second organic compound layer 103b is intermediate. It is held between the electrode 104 and the upper electrode 105. Further, the partition wall 102 is not provided at the boundary between the first organic compound layer 103a and the second organic compound layer 103b.

  Other than that, the organic EL display device can be formed by the same method as in the third embodiment in terms of materials, manufacturing method, and driving method.

  According to the present embodiment, a high-definition full-color organic EL display device can be manufactured using a rigid shadow mask as shown in FIG.

  As described above, in all the embodiments, the first organic compound layer, the second organic compound layer, and the third organic compound layer emit light of green, blue, and red, respectively. It is not limited. For example, it is possible to select a light emitting layer that emits blue light for the light emitting layer of the third organic compound layer, and to ensure a wide blue light emitting region with the lowest light emission efficiency.

301a First organic compound layer 301b Second organic compound layer 301c Third organic compound layer

Claims (5)

In a pixel consisting of two subpixels,
A first layer composed of a first organic compound layer and a second organic compound layer arranged side by side in the same plane;
A second layer including a third organic compound layer, laminated with the first layer;
An organic EL display device comprising:
Each of the first organic compound layer and the second organic compound layer is formed as a common layer between adjacent subpixels of adjacent pixels,
The organic EL display device, wherein the third organic compound layer is formed as a common layer among all pixels.   The first layer and the second layer are sandwiched between an upper electrode and a lower electrode, and a light emitting region of the first layer is defined by an area in contact with either the upper electrode or the lower electrode. 2. The organic EL display device according to claim 1, wherein the light emitting region of the second layer is defined by an area in contact with the other electrode.   An intermediate electrode is disposed between the first layer and the second layer, and each light emitting region of the first layer and the second layer is defined by an area in contact with the intermediate electrode. The organic EL display device according to claim 1. A first layer composed of a first organic compound layer and two organic compound layers arranged side by side in the same plane in a pixel composed of two subpixels;
A second layer including a third organic compound layer laminated with the first layer;
A method for manufacturing an organic EL display device comprising:
The step of forming the first layer includes:
Forming the first organic compound layer common between adjacent sub-pixels of adjacent pixels;
Forming the second organic compound layer that is common between adjacent sub-pixels of adjacent pixels, and
The step of forming the second layer includes
A method of manufacturing an organic EL display device comprising a step of forming the third organic compound layer common to all pixels.   The step of forming the first organic compound layer and the second organic compound layer is a vacuum vapor deposition method using a shadow mask, and is common to adjacent sub-pixels of the adjacent pixels. 5. The organic EL according to claim 4, wherein the second organic compound layer that is common between the organic compound layer and the adjacent sub-pixels of the adjacent pixels is formed using the same opening of the mask. Manufacturing method of display device.