JP2016126860A - Display device, method of manufacturing the same, and electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device capable of improving the display image quality by suppressing generation of leakage current.SOLUTION: A display device comprises on a substrate a plurality of pixels each including a light-emitting element. The light-emitting element has, sequentially from the substrate side, a first electrode arranged so as to be electrically isolated for each pixel, an organic layer including a light-emitting layer of any one of a plurality of kinds of luminous colors, and a second electrode. In a region between two or more adjacent first pixels of the plurality of pixels, a second organic layer that covers an end surface of a first organic layer and that is different from the first organic layer is formed.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to a display device such as an organic electroluminescent device, a manufacturing method thereof, and an electronic apparatus including such a display device.

  In recent years, development of display devices (organic EL displays) using organic electroluminescence (EL) elements has been progressing. In this display device, for example, an organic layer including a light emitting layer and a second electrode are formed on a first electrode formed separately for each pixel. In addition, an organic layer including any one of the R, G, and B light emitting layers is separately applied to each pixel. Such an organic layer is formed having an end face in a region between the first electrodes.

However, when the end face of the organic layer is in contact with the second electrode formed thereon, a leak current is generated between the first electrodes or between the first electrode and the second electrode. The occurrence of a leak current causes a decrease in luminance and leads to a decrease in display image quality. Therefore, a structure has been proposed in which the end face of the organic layer is embedded in an insulating layer made of SiO ₂ so that the end face of the organic layer is not exposed to the second electrode in the region between the first electrodes (Patent Document). 1). Further, the first electrode and the second electrode are disposed to face each other with the organic layer interposed therebetween so as to intersect each other.

JP 2005-276667 A

However, in the method of Patent Document 1, the film formation temperature of the insulating layer (SiO ₂ ) is high, and there is room for improvement in positional accuracy. It is desired to realize an element structure capable of improving the deposition position accuracy of the insulating layer and suppressing current leakage through the end face of the organic layer.

  The present disclosure has been made in view of such problems, and an object of the present disclosure is to provide a display device, a display device manufacturing method, and an electronic apparatus that can improve the display image quality by suppressing the occurrence of leakage current. It is in.

  The display device of the present disclosure includes a plurality of pixels each including a light-emitting element on a substrate, and the light-emitting element includes a first electrode arranged in an electrically separated manner for each pixel in order from the substrate side, and a plurality of the light-emitting elements. An organic layer including any one of the light emitting layers of the types of light emitting colors and a second electrode, and a first region is formed in a region between two or more adjacent first pixels among the plurality of pixels. A second organic layer that covers the end face of the organic layer and is different from the first organic layer is formed.

  In the method for manufacturing a display device according to the present disclosure, when a plurality of pixels each including a light emitting element is formed on a substrate, the first light emitting element is disposed on the substrate as a light emitting element and is electrically separated for each pixel. An electrode, an organic layer including a light emitting layer of any of a plurality of types of light emission colors, and a second electrode are formed in this order, and two or more first pixels adjacent to each other among the plurality of pixels have a first After the organic layer is formed and before the second electrode is formed, a second organic layer that covers the end face of the first organic layer and is different from the first organic layer is formed in a region between the first pixels. Form.

  An electronic device according to the present disclosure includes the display device according to the present disclosure.

  In the display device and the electronic apparatus according to the present disclosure, a second organic layer that covers the end surface of the first organic layer and is different from the first organic layer is formed in a region between two or more adjacent first pixels. Is formed. Thereby, generation | occurrence | production of the leakage current via the 1st organic layer end surface is suppressed between adjacent 1st electrodes or between 1st electrode and 2nd electrode. In addition, by using the second organic layer, the film formation temperature is lowered and the film formation position accuracy is improved as compared with the case where an inorganic material is used.

  In the method for manufacturing a display device according to the present disclosure, a second organic layer that covers the end face of the first organic layer and is different from the first organic layer is formed in a region between two or more adjacent first pixels. It is formed. Thereby, generation | occurrence | production of the leakage current via the 1st organic layer end surface is suppressed between adjacent 1st electrodes or between 1st electrode and 2nd electrode. In addition, by using the second organic layer, the film formation temperature is lowered and the film formation position accuracy is improved as compared with the case where an inorganic material is used.

  In the display device, the manufacturing method of the display device, and the electronic apparatus according to the present disclosure, the end surface of the first organic layer is covered in a region between two or more adjacent first pixels and is different from the first organic layer. A second organic layer is formed. As a result, it is possible to improve the display image quality by suppressing the occurrence of leakage current.

  The above content is an example of the present disclosure. The effects of the present disclosure are not limited to those described above, and may be other different effects or may include other effects.

It is a figure showing the whole structure of the display apparatus which concerns on 1st Embodiment of this indication. It is a figure showing an example of the pixel circuit shown in FIG. It is sectional drawing showing the structure of the display apparatus shown in FIG. It is a top view showing the opening (pixel opening) of the pixel separation film shown in FIG. 3, and the formation area of an organic layer. It is sectional drawing for demonstrating the manufacturing method of the display apparatus shown in FIG. It is sectional drawing showing the process of following FIG. 5A. It is sectional drawing showing the process of following FIG. 5B. It is sectional drawing showing the process of following FIG. 5C. It is sectional drawing showing the process of following FIG. 5D. It is a schematic diagram showing an example of the vapor deposition apparatus used at the time of organic layer film-forming. It is a schematic diagram showing the comparative example of the vapor deposition apparatus shown in FIG. It is a schematic diagram for demonstrating the effect of the vapor deposition apparatus shown in FIG. It is sectional drawing showing the principal part structure of the display apparatus which concerns on the comparative example 1-1. It is sectional drawing showing the principal part structure of the display apparatus which concerns on the comparative example 1-2. It is sectional drawing showing the principal part structure of the display apparatus which concerns on Comparative Example 1-3. It is sectional drawing showing the principal part structure of the display apparatus which concerns on the comparative example 1-4. It is sectional drawing showing the principal part structure of the display apparatus shown in FIG. It is a top view showing the pixel opening which concerns on the modification 1-1, and the formation area of an organic layer. It is a top view showing the pixel opening which concerns on modification 1-2, and the formation area of an organic layer. It is a top view showing the pixel opening which concerns on modification 1-3, and the formation area of an organic layer. It is a top view showing the pixel opening which concerns on modification 2-1, and the formation area of an organic layer. It is a top view showing the pixel opening which concerns on modification 2-2, and the formation area of an organic layer. It is a top view showing the pixel opening which concerns on modification 2-3, and the formation area of an organic layer. It is a top view showing the pixel opening which concerns on modification 2-4, and the formation area of an organic layer. It is a top view showing the pixel opening which concerns on the modification 3-1, and the formation area of an organic layer. It is a top view showing the pixel opening which concerns on modification 3-2, and the formation area of an organic layer. It is a top view showing the pixel opening which concerns on modification 3-3, and the formation area of an organic layer. 10 is a cross-sectional view illustrating a configuration of a main part of a display device according to a second embodiment of the present disclosure. FIG. FIG. 14 is a plan view illustrating an example of a pixel opening and an organic layer formation region of the display device illustrated in FIG. 13. FIG. 14 is a plan view illustrating another example of a pixel opening and an organic layer formation region of the display device illustrated in FIG. 13. 12 is a cross-sectional view illustrating a configuration of a main part of a display device according to Comparative Example 2. FIG. It is a top view showing the pixel opening which concerns on the modification 4-1, and the formation area of an organic layer. It is a top view showing the pixel opening which concerns on modification 4-2, and the formation area of an organic layer. It is a top view showing the pixel opening which concerns on modification 4-3, and the formation area of an organic layer. It is a top view showing the pixel opening which concerns on modification 4-4, and the formation area of an organic layer. It is a top view showing the pixel opening which concerns on the modification 5-1, and the formation area of an organic layer. It is a top view showing the pixel opening which concerns on modification 5-2, and the formation area of an organic layer. It is a top view showing the pixel opening which concerns on modification 5-3, and the formation area of an organic layer. It is a top view showing the pixel opening which concerns on modification 5-4, and the formation area of an organic layer. It is a top view showing the pixel opening which concerns on the modification 5-5, and the formation area of an organic layer. It is a top view showing the pixel opening which concerns on modification 5-6, and the formation area of an organic layer. It is a top view showing the pixel opening which concerns on modification 6-1, and the formation area of an organic layer. It is a top view showing the pixel opening which concerns on modification 6-2, and the formation area of an organic layer. It is a top view showing the pixel opening which concerns on modification 6-3, and the formation area of an organic layer. It is a top view showing the pixel opening which concerns on modification 6-4, and the formation area of an organic layer. It is a top view showing the pixel opening which concerns on the modification 6-5, and the formation area of an organic layer. It is a top view showing the pixel opening which concerns on modification 6-6, and the formation area of an organic layer. It is a top view showing the pixel opening which concerns on the modification 6-7, and the formation area of an organic layer. It is a perspective view showing the composition of a smart phone. It is a perspective view showing the composition of a smart phone. It is a perspective view showing the structure of a television apparatus. It is a top view showing the structure of a mobile telephone. It is a top view showing the structure of a mobile telephone.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The description will be given in the following order.
1. First embodiment (an example of a display device in which an organic layer of a second pixel (B pixel) is formed in a region between adjacent first pixels (R pixel, G pixel))
2. Modifications 1-1 to 1-3 (Other example of pixel aperture shape)
3. Modified examples 2-1 to 2-4 (examples where the organic layer is formed using a predetermined mask)
4). Modified examples 3-1 to 3-4 (examples in which the organic layer is formed using another mask)
5). Second embodiment (an example of a display device further including an auxiliary electrode electrically connected to the second electrode)
6). Modified examples 4-1 to 4-4 (other examples of pixel aperture shapes)
7). Modified examples 5-1 to 5-6 (examples where the organic layer is formed using a predetermined mask)
8). Modifications 6-1 to 6-7 (example in which the organic layer is formed using another mask)
9. Application examples (examples of electronic devices)

<First Embodiment>
[Constitution]
FIG. 1 illustrates a configuration of a display device (display device 1) according to the first embodiment of the present disclosure. The display device 1 is an organic EL display, for example, and has a plurality of pixels PIXC arranged in a matrix in a display area 110A on a substrate (first substrate 11). Each pixel PIXC includes, for example, any of a plurality of types of organic EL elements 10 (10R, 10G, 10B) (light emitting elements) having different emission colors, and any subpixel of the R pixel, the G pixel, and the B pixel. It is equivalent to. A set of R pixel, G pixel and B pixel corresponds to one pixel. The organic EL element 10R is red light LR (wavelength 620 nm to 750 nm), the organic EL element 10G is green light LG (wavelength 495 nm to 570 nm), and the organic EL element 10B is blue light LB (wavelength 450 nm to 450 nm). 495 nm) respectively. However, in the following description, when it is not particularly necessary to distinguish the emission color, the organic EL element 10 will be described. Around the display area 110A, a signal line driving circuit 120 and a scanning line driving circuit 130 for video display, and a power supply circuit (not shown) are provided.

  FIG. 2 illustrates a circuit configuration of the pixel PIXC. The pixel PIXC includes, for example, an active pixel circuit, and includes a driving transistor Tr1 and a writing transistor Tr2, and a capacitor Cs disposed between the transistors Tr1 and Tr2. Between the first power supply line (Vcc) and the second power supply line (GND), the transistor Tr1 of the organic EL element 10 is connected in series. The signal line driver circuit 120 supplies an image signal to the source electrode of the transistor Tr2 through a plurality of signal lines 120A arranged in the column direction. The scanning line driving circuit 130 sequentially supplies a scanning signal to the gate electrode of the transistor Tr2 through a plurality of scanning lines 130A arranged in the row direction.

  FIG. 3 shows a cross-sectional configuration of the display device 1 shown in FIG. In FIG. 3, only regions corresponding to the R pixel, G pixel, and B pixel are shown. The display device 1 is a so-called top emission type (top emission type) organic EL display in which light generated in, for example, organic layers (organic layers 15R, 15G, and 15B) described later is extracted from the second electrode 16 side. The organic EL elements 10R, 10G, and 10B are provided between the first substrate 11 and the second substrate 18. A circuit layer (not shown in FIG. 3) including the above-described transistors Tr1, Tr2, etc. is formed on the first substrate 11, and a planarizing film 12 is formed so as to cover the circuit layer. On the planarizing film 12, for example, a first electrode 13 as an anode (anode) is provided. The first electrode 13 is electrically connected to the transistor Tr1.

  In the organic EL element 10, a first electrode 13, an organic layer including a light emitting layer (organic layers 15R, 15G, and 15B), and a second electrode 16 as a cathode, for example, are stacked in order from the first substrate 11 side. It is a thing. The organic layers 15R, 15G, and 15B are separately painted for each pixel (formed separately for each pixel). On this organic EL element 10, the 2nd board | substrate 18 is bonded together through the sealing layer 17 containing a protective film, an adhesive layer, etc. FIG. Hereinafter, the configuration of each unit will be described.

The first substrate 11 is a drive substrate in which the circuit layer is formed on, for example, glass, a silicon (Si) wafer, a resin, or a conductive substrate. As the conductive substrate, for example, a substrate whose surface is insulated with silicon oxide (SiO ₂ ), resin, or the like is used. The transistors Tr1 and Tr2 formed in the circuit layer are thin film transistors (TFTs) configured by, for example, MOSFETs (Metal Oxide Semiconductor Field Effect Transistors).

The planarization film 12 is for planarizing the surface of the first substrate 11 and forming the thickness of each layer of the organic EL element 10 uniformly. As a constituent material of the planarizing film 12, for example, an organic material such as polyimide resin, acrylic resin, and novolac resin, or an inorganic material such as silicon oxide (SiO ₂ ), silicon nitride (SiNx), or silicon oxynitride (SiON) is used. Can be mentioned.

  The first electrode 13 is disposed on the planarizing film 12 so as to be electrically separated for each pixel (arranged on the planarizing film 12 with an interval). Specifically, a plurality of first electrodes 13 are arranged at intervals, and a pixel separation film (partition wall) 14 is formed on the plurality of first electrodes 13. The pixel separation film 14 has an opening facing the first electrode 13, and any one of the first electrode 13 and the organic layers 15R, 15G, and 15B is in contact with the opening.

  The planar shape of the first electrode 13 is, for example, a rectangular shape. Each first electrode 13 functions as an electrode that injects holes, for example, into any of the organic layers 15R, 15G, and 15B. The first electrode 13 has light reflectivity, and it is desirable to increase the luminous efficiency to have as high a reflectance as possible. Examples of the constituent material of the first electrode 13 include simple elements or alloys of metal elements such as silver (Ag) and aluminum (Al). In addition, the first electrode 13 may be a single layer film including a single metal or an alloy described above, or may be a laminated film. Alternatively, indium tin oxide (ITO) or the like may be used.

The pixel separation film 14 is an insulating film for defining a light emitting region (pixel opening) and electrically separating the first electrode 13 for each pixel. The pixel isolation film 14 is made of, for example, a silicon oxide film such as SiO ₂ or polyimide. Organic layers 15R, 15G, and 15B are formed in the opening of the pixel separation film 14, and the first electrode 13 is formed.

  The organic layers 15R, 15G, and 15B include, for example, any one of a plurality of types of emission colors and a hole transport layer (HTL). However, the organic layers 15R, 15G, and 15B may further include, for example, a hole injection layer (HIL) and an electron transport layer (ETL).

  FIG. 4 shows the openings (openings H1a and H1b) of the pixel isolation film 14 and the formation regions of the organic layers 15R, 15G, and 15B according to the present embodiment. The configuration of the cross section taken along the line II in FIG. 4 corresponds to the configuration of FIG. Each of the openings H1a and H1b in the pixel isolation film 14 has a rectangular shape. That is, in this embodiment, each of the R, G, and B pixels is formed in a rectangular region, and the set of these R, G, and B pixels forms a stripe shape. Here, an opening H1a is formed in a region corresponding to the R pixel and the G pixel, and an opening H1b is formed in a region corresponding to the B pixel. Organic layers 15R and 15G are formed facing the opening H1a, and an organic layer 15B is formed facing the opening H1b.

  In the present embodiment, organic layers 15R and 15G (first pixels) are formed in a region (region between the openings H1a) between two adjacent pixels (here, R pixel and G pixel: first pixel). An organic layer (organic layer 15B1: second organic layer) made of an organic material different from the organic layers 15R and 15G is formed so as to cover each end face of the organic layer). The organic layer 15B1 includes a constituent material of the organic layer 15B of the B pixel (second pixel). Here, as shown in FIG. 4, the organic layer 15 </ b> B (shaded portion) is formed over substantially the entire region excluding the opening H <b> 1 a of the R pixel and the G pixel in plan view. A portion extending in a region between the openings H1a in the organic layer 15B corresponds to the organic layer 15B1. The end portion of the organic layer 15B1 desirably has a tapered shape. This is to suppress disconnection of the second electrode 16.

  The second electrode 16 is light transmissive and is formed over the entire surface of the display region 110A, for example, common to all pixels. The second electrode 16 is made of, for example, an alkali metal such as lithium (Li) or potassium (K) having a low work function, an alkaline earth metal such as magnesium (Mg) or calcium (Ca), and these metals and silver or aluminum. It is preferably formed from a metal material such as an alloy or a mixture thereof. In order to achieve both storage stability and electron injectability at the cathode, the electrode formed of the above material may be further coated with silver, aluminum (Al), gold (Au) or the like having a high work function and high conductivity. Good. The second electrode 18 may be a transparent electrode. The second electrode 18 can be formed by a known method such as a vacuum deposition method, a sputtering method, or an ion plating method.

  The sealing layer 17 includes a protective film made of, for example, silicon nitride, silicon oxide, or metal oxide, and an adhesive layer made of, for example, a thermosetting resin or an ultraviolet curable resin.

  The second substrate 18 is made of a material such as glass that is transparent to each color light generated in the organic EL elements 10R, 10G, and 10B.

[Production method]
The display device 1 as described above can be manufactured, for example, as follows. FIG. 5A to FIG. 5E are schematic views for explaining a method for manufacturing the display device 1 of the present embodiment.

  First, after the planarization layer 12 is formed on the first substrate 11, a plurality of first electrodes 13 are formed on the first substrate 11 at a predetermined interval. Examples of the film formation method for the first electrode 13 include a vacuum deposition method, a sputtering method, and an ion plating method.

Thereafter, as shown in FIG. 5A, the pixel isolation film 14 made of the above-described material is formed. At this time, by covering the end portion of the first electrode 13 with the pixel separation film 14, it is possible to alleviate an electrical failure due to a step. The pixel isolation film 14 is formed with openings H1a and H1b by photolithography or the like after, for example, SiO _{2 is formed} by CVD or the like, or after polyimide is applied by coating.

  Next, as shown in FIGS. 5B and 5C, organic layers 15R and 15G are sequentially formed so as to cover the first electrode 13 in the opening H1a. At this time, the organic layers 15R and 15G are formed to have patterns separated from each other so as not to overlap. These organic layers 15R and 15G can be formed by, for example, masking a discontinuous portion (a region between the R pixel and the G pixel) and depositing an organic material by, for example, a vacuum deposition method. Alternatively, the organic layers 15R and 15G can be formed in the above pattern by an inkjet method. Further, the organic layers 15R and 15G are not limited to such a forming method, and may be formed by patterning using etching. For example, the organic layers 15R and 15G are respectively formed in a state extending continuously in the column direction, and then the organic layers 15R and 15G formed in the portion between the first electrodes 13 are selectively etched. You may make it remove. Examples of the etching technique include laser etching, dry etching using photolithography, wet etching, and the like. It is also possible to partially remove the organic layers 15R and 15G with a sharp needle. However, in these etching methods, laser etching is desirable because the organic layers 15R and 15G remaining on the first electrode 13 are not damaged.

  Here, FIG. 6 schematically shows a configuration example of a vapor deposition apparatus suitable for forming the organic layers 15R, 15G, and 15B as described above in a predetermined pattern. The vapor deposition apparatus includes, for example, a material supply source 120, a heater 121, a vapor deposition belt 122, a vapor deposition heater 123, and a reflection plate 124. The vapor deposition belt 122 is configured to be able to move cyclically between the material supply source 120 and the reflection plate 124. The reflector 124 is provided with a groove 124a, and a part of the vapor deposition belt 122 is exposed to the vapor deposition substrate (first substrate 11) through the groove 124a. With such a configuration, the organic material stored in the material supply source 120 is once deposited on the deposition belt 122 by the heat of the heater 121 to form a thin film. Thereafter, the formed thin film is moved to the vicinity of the groove 124a of the reflecting plate 124. In the groove 124a of the reflection plate 124, the thin film on the vapor deposition belt 122 is heated again by the vapor deposition heater 123, whereby an organic material can be vapor-deposited on the vapor deposition substrate.

  Thus, there are the following merits by depositing the organic material stepwise through the deposition belt 122. That is, in an apparatus in which an organic material is ejected from an ejection hole (deposition hole), clogging of the hole may occur. However, in the deposition apparatus using the above-described deposition belt 122, such clogging occurs. Does not occur. Moreover, since the organic material of a thin film can be vapor-deposited without worrying about redeposition or fixation, the heating temperature by the vapor deposition heater 123 can be set as low as possible. For this reason, the temperature of the mask can be reduced.

  Here, FIG. 7A schematically shows the arrangement relationship between the ejection holes (deposition holes 1103) and the film formation areas (film formation areas 1102) when a general vapor deposition apparatus is used as a comparative example. As described above, in an apparatus that ejects an organic material from the vapor deposition hole 1103, the distance between the vapor deposition source and the deposition target substrate 1101 is large. A vapor deposition hole 1103 is provided. On the other hand, in the vapor deposition apparatus shown in FIG. 6, since the mask temperature can be reduced, the distance between the vapor deposition source and the deposition target substrate (first substrate 11) can be narrowed. The vapor deposition belt 122 may be disposed in a region corresponding to the area 125. Thereby, it becomes possible to arrange | position a mask close to a to-be-deposited board | substrate, and can raise the material efficiency of vapor deposition material.

  In addition, the layout of the vapor deposition belt 122 does not have to be arranged along the vertical direction as shown in the drawing, and can be freely set. For this reason, it is also possible to use the substrate to be deposited in a vertical state.

  Subsequently, as shown in FIG. 5D, an organic layer 15B is formed. At this time, the organic layer 15B is formed in a portion where the organic layers 15R and 15B are not formed so as to cover the end faces of the organic layers 15R and 15G (so that the end faces are not exposed). Thereby, in the region between the R pixel and the G pixel (region between the openings H1a and H1b), the organic layer 15B1 is formed so as to cover the end faces of the organic layers 15R and 15G.

  Thereafter, as shown in FIG. 5E, the organic EL elements 10R, 10G, and 10B can be formed by forming the second electrode 9. Finally, the sealing layer 17 is formed so as to cover these organic EL elements 10R, 10G, and 10B, and the second substrate 18 is bonded to complete the display device 1 shown in FIG.

[Action, Effect]
In the display device 1, as shown in FIGS. 1 and 2, a scanning signal is supplied from the scanning line driving circuit 130 to the gate of the transistor Tr2 of each pixel PIXC, and a video signal is output from the signal line driving circuit 120. The voltage is supplied to and held in the holding capacitor Cs via the transistor Tr2. The transistor Tr1 is controlled to be turned on / off according to the signal held in the holding capacitor Cs, whereby the drive current Id is injected into the organic EL element 10 (10R, 10G, 10B) of each pixel PIXC. When this drive current Id is injected into the respective light emitting layers of the organic layers 15R, 15G, and 15B through the first electrode 13 and the second electrode 16, holes and electrons are recombined and light emission occurs.

  Each color light generated from each organic EL element 10R, 10G, 10B is transmitted through the second electrode 16, the sealing layer 17, the second substrate 18 and the like, and is converted into red light LR, green light LG, blue light LB as the second light. The light exits above the substrate 18. In this way, the display device 1 performs video display by the top emission method.

  Here, as a comparative example of the present embodiment (Comparative Example 1-1), FIG. 8A shows a main configuration in the case where the organic layer (organic layer 105) is formed as a common layer for all pixels. In Comparative Example 1-1, a plurality of first electrodes 103 are arranged on the first substrate 101 with the planarizing film 102 interposed therebetween. A pixel separation film 104 having an opening is formed on the plurality of first electrodes 103, and covers the entire surface of the first electrode 103 and the pixel separation film 104, and an organic layer 105 including a white light emitting layer and the like. Is formed. A second electrode 106 is formed on the organic layer 105. In such an element structure of Comparative Example 1-1, since the organic layer 105 is formed in common for all the pixels, current leakage (arrow X in the drawing) occurs between the adjacent pixels through the organic layer 105.

  FIG. 8B shows a configuration of a main part when an organic layer is formed separately for each pixel as Comparative Example 1-2. In Comparative Example 1-2, the end face e1 of the organic layer 105R and the end face e2 of the organic layer 105G are in contact with the second electrode 106. As a result, current leakage (X1, X2 in the figure) occurs between the first electrode 103 and the second electrode 106 via the end faces e1, e2.

  In order to suppress the current leakage as described above, a structure in which the organic layer 105 is divided into the pixel separation film 104 as in Comparative Examples 1-3 and 1-4 shown in FIGS. 8C and 8D. Can be considered. For example, as shown in FIG. 8C, a convex portion 104a is formed on the upper surface of the pixel separation film 14, and the organic layer 105 is divided at the convex portion 104a. Alternatively, as shown in FIG. 8D, a recess 104b is formed on the upper surface of the pixel isolation film 14, and the organic layer 105 is divided in the recess 104b. However, in these Comparative Examples 1-3 and 1-4, there is a possibility that disconnection (X3, X4 in the drawing) occurs in the second electrode 106.

  On the other hand, in the present embodiment, as shown in FIG. 9, the end faces e1 and e2 of the organic layers 15R and 15G are covered in the region between two adjacent pixels (here, R pixel and G pixel). Thus, an organic layer 15B1 is formed (region A in the figure). Thereby, it is suppressed that leak current arises between adjacent 1st electrodes 13 via organic layer 15R, 15G. In addition, the second electrode 16 is electrically connected to the end faces e1 and e2 of the organic layers 15R and 15G, and the occurrence of a leakage current between the first electrode 13 and the second electrode 16 is also suppressed.

  As a result, in the organic layers 15R and 15G, almost all of the current that is originally used for light emission flows through the portion that should emit light (the portion that opposes the opening H1a). it can. In addition, even when a circuit operation is performed in which the light emitting unit is used as an electric capacity, a reduction in display quality due to leakage current is suppressed.

  As described above, in the present embodiment, the end surfaces of the organic layers 15R and 15G are covered in a region between two or more adjacent first pixels (here, R pixels and G pixels) and these organic layers are covered. An organic layer (organic layer 15B1) different from the layers 15R and 15G is formed. Thereby, generation | occurrence | production of the leakage current via the end surface of organic layer 15R, 15G can be suppressed between the adjacent 1st electrodes 13 or between the 1st electrode 13 and the 2nd electrode 16. FIG. In addition, the use of the organic layer 15B1 makes it possible to lower the film formation temperature and improve the film formation position accuracy as compared with the case where an inorganic material is used. Therefore, it is possible to improve the display image quality by suppressing the occurrence of leakage current.

  In the present embodiment, the organic layer 15B of the B pixel is used as the second organic layer that covers the end face of the first organic layer (organic layers 15R and 15G). That is, the organic layer 15B1 includes the constituent material of the organic layer 15B. Here, the organic layer 15B is formed over the entire region excluding the opening H1a, and the organic layer 15B1 is a film continuous with the organic layer 15B (same film). ). That is, it is not necessary to prepare a new material and form a separate pattern as an organic layer covering the end faces of the organic layers 15R and 15G, so that the number of processes and cost do not increase.

  In the above-described embodiment, the R pixel and the G pixel are described as examples of the two or more adjacent first pixels, and the B pixel is described as an example of the second pixel. The second pixel is not limited to this combination. However, it is desirable that the organic layer of the second pixel has lower current leakage than the organic layer of the first pixel. The same applies to the following modifications and embodiments.

  Next, a modified example of the first embodiment and other embodiments will be described. In the following, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted as appropriate.

<Modifications 1-1 to 1-3>
10A to 10C show pixel openings and organic layer formation regions according to Modifications 1-1 to 1-3 of the first embodiment. In the above embodiment, the case where all the R, G, and B pixels are formed in a rectangular region is illustrated, but the shape of each pixel (the opening shape of the pixel separation film) is not limited to a rectangular shape, Moreover, you may differ for every pixel. Also in this modification, the organic layers 15R and 15G are formed in the openings of the first pixels (R pixels and G pixels), and the openings of these first pixels (R pixels and G pixels) are formed. The organic layer 15B is formed over substantially the entire area except the area.

  For example, as shown in FIG. 10A, the opening H2a of the first pixel (R pixel, G pixel) has a square shape or a rectangular shape close to a square shape, and the opening H2b of the second pixel (B pixel) has a rectangular shape. It may be. In this example, two openings H2a are arranged in the column direction, and an opening H2b is formed adjacent to each of these two openings H2a.

  Further, as shown in FIG. 10B, each opening H2a of the first pixel (R pixel, G pixel) and the second pixel (B pixel) may be a square shape or a rectangular shape close to a square shape. .

  Furthermore, as shown in FIG. 10C, each opening H3 of the first pixel (R pixel, G pixel) and the second pixel (B pixel) may be circular. In this case, the first pixel (R pixel, G pixel) is arranged along the outer periphery of, for example, a polygonal shape or a circular shape so as to surround the second pixel (B pixel).

<Modifications 2-1 to 2-4>
11A to 11D show pixel openings and organic layer formation regions according to the modified examples 2-1 to 2-4 of the first embodiment. In the above embodiment, the organic layer 15B (15B1) is formed over substantially the entire area excluding the opening of the first pixel (R pixel, G pixel), but the formation region of the organic layer 15B (15B1) is limited to this. Is not to be done. That is, if the formation region of the organic layer 15B (15B1) covers the end surfaces of the organic layers 15R and 15G in the region between the first pixels (R pixel and G pixel), the organic layer 15R, It is not necessary to cover the entire end face of 15G.

For example, as shown in FIG. 11A, when the first pixels (R pixels, G pixels) are respectively arranged (arranged along the column direction) in a row or column (here, column) region. The organic layer 15B may be formed over substantially the entire region excluding these columnar regions.
Such an organic layer 15B can be formed using, for example, a mask having a slit-like opening called a shadow mask.

  Also in the present modification, the shape of the pixel opening is not limited to a rectangular shape, and as shown in FIG. 11B, the first pixel (R pixel, G pixel) has a square opening H2a. In the formed second pixel (B pixel), a rectangular opening H2b may be formed.

  Furthermore, as shown in FIG. 11C and FIG. 11D, when all of the first pixel (R pixel, G pixel) and the second pixel (B pixel) have a square opening H2a, a predetermined shadow By using the mask, the organic layer 15B can be formed in a region excluding each of the row region and the column region where the first pixels (R pixel and G pixel) are arranged.

<Modifications 3-1 to 3-3>
12A to 12C illustrate pixel openings and organic layer formation regions according to the modified examples 3-1 to 3-3 of the first embodiment. In the above embodiment, the organic layer 15B (15B1) is formed over substantially the entire area excluding the opening of the first pixel (R pixel, G pixel), but the formation region of the organic layer 15B (15B1) is limited to this. Is not to be done. That is, if the formation region of the organic layer 15B (15B1) covers the end surfaces of the organic layers 15R and 15G in the region between the first pixels (R pixel and G pixel), the organic layer 15R, It is not necessary to cover the entire end face of 15G.

  For example, as shown in FIG. 12A, when the first pixels (R pixels, G pixels) are respectively arranged (arranged along the column direction) in row or column (here, column) regions. The organic layer 15B may be formed over substantially the entire region excluding these columnar regions. However, in this modified example, the non-formation region 15BL of the organic layer 15B is narrower in the region between the R pixels and the G pixel than in the modified example 2-1 (FIG. 11A). . Thereby, most end surfaces of the organic layers 15R and 15G can be covered with the organic layer 15B. Such an organic layer 15B can also be formed using, for example, a shadow mask.

  Also in this modification, the shape of the pixel opening is not limited to a rectangular shape, and as shown in FIG. 12B, the first pixel (R pixel, G pixel) has a square opening H2a. In the formed second pixel (B pixel), a rectangular opening H2b may be formed.

  Furthermore, as illustrated in FIG. 12C, a circular opening H3 may be formed in the first pixel (R pixel, G pixel) and the second pixel (B pixel).

<Second Embodiment>
[Constitution]
FIG. 13 illustrates a main configuration of the display device according to the first embodiment of the present disclosure. The display device of the present embodiment is, for example, an organic EL display as in the first embodiment, and has a plurality of pixels PIXC arranged in a matrix in the display region 110A on the first substrate 11. ing. Each pixel PIXC includes any of the organic EL elements 10 (10R, 10G, 10B) (light emitting elements), and corresponds to any one of the R pixel, the G pixel, and the B pixel. . The organic EL elements 10R, 10G, and 10B are provided between the first substrate 11 and the second substrate 18, and sequentially from the first substrate 11 side, the first electrode 13 and the organic layers (organic layers 15R, 15G, 15B) and the second electrode 16 are laminated. On this organic EL element 10, the 2nd board | substrate 18 is bonded through the sealing layer 17 which is not shown in figure.

  Also in the present embodiment, as in the first embodiment, the end surfaces of the organic layers 15R and 15G are covered with the organic layer 15B1 in the region between the first pixels (R pixels and G pixels). . Thereby, generation | occurrence | production of the leakage current via the end surface of organic layer 15R, 15G can be suppressed.

  However, in the present embodiment, an auxiliary electrode 19 electrically connected to the second electrode 16 is formed in a selective region on the first substrate 11 (on the planarizing film 12). The organic layer 15B is not formed on the auxiliary electrode 19, but is formed in contact with the second electrode 16 (having a cathode contact portion 19C).

  The location where the cathode contact portion 19C (or auxiliary electrode 19) is formed is not particularly limited. For example, as shown in FIGS. 14A and 14B, the cathode contact portion 19C is disposed in a region between adjacent pixels in the row direction. . 14A corresponds to the main configuration of FIG. 13. In the example of FIG. 14A, it arrange | positions in the area | region between B pixels, and in the example of FIG. 14B, respectively, it arrange | positions in the area | region between R pixels. As described above, when the cathode contact portion 19C is disposed, the organic layer 15B includes the opening H1a of the first pixel (R pixel, G pixel) and the cathode contact portion 19C (auxiliary electrode 19) in plan view. It is formed in the area except for.

  Here, FIG. 15 shows a main configuration of a display device according to a comparative example (comparative example 2) of the present embodiment. In the display device of Comparative Example 2, the first electrode 103 and the auxiliary electrode 107 are formed on the first substrate 101 via the planarization film 102. The organic layer is applied separately for each pixel (organic layers 105R and 105G are formed). In such a configuration, a common electron transport layer (charge blocking layer) 108 is formed over the entire surface of the first substrate 101. In the display device of Comparative Example 2, although the common electron transport layer 108 is interposed between the organic layers 105R and 105G and the second electrode 106, the generation of leakage current can be suppressed, but the auxiliary electrode 107 and the second electrode The common electron transport layer 108 is also interposed between the first and second layers 106. For this reason, a good cathode contact cannot be secured.

  On the other hand, in the present embodiment, the organic layer 15b is not formed on the auxiliary electrode 19 by forming the organic layer 15B using a predetermined mask. For this reason, the auxiliary electrode 19 and the 2nd electrode 16 can be electrically connected, and a favorable cathode contact is realizable.

<Modifications 4-1 to 4-4>
FIGS. 16A to 16D show pixel openings and organic layer formation regions according to modified examples 4-1 to 4-4 of the second embodiment. In the second embodiment, the case where all the R, G, and B pixels are formed in a rectangular region has been exemplified. However, the shape of each pixel (the opening shape of the pixel separation film) is limited to a rectangular shape. They may not be different for each pixel. Further, the formation position of the cathode contact portion 19C is not limited to that described above. Also in this modification, the organic layers 15R and 15G are formed in the openings of the first pixels (R pixels and G pixels), respectively, and the openings of these first pixels (R pixels and G pixels) The organic layer 15B is formed over substantially the entire region excluding the cathode contact portion 19C.

  For example, as shown in FIG. 16A and FIG. 16B, a square opening H2a is formed in the first pixel (R pixel, G pixel), and a rectangular opening H2b is formed in the second pixel (B pixel). May be formed. Further, as shown in FIG. 16A, the cathode contact portion 19C may be formed in a region between openings H2b adjacent in the column direction (between B pixels), or as shown in FIG. 16B. In addition, it may be formed at a position adjacent to the opening H2a of the first pixel. Or you may form in the position as shown to FIG. 16C.

  Furthermore, as illustrated in FIG. 16D, a circular opening H3 may be formed in the first pixel (R pixel, G pixel) and the second pixel (B pixel).

<Modifications 5-1 to 5-6>
FIG. 17A to FIG. 17F show pixel openings and organic layer formation regions according to Modifications 5-1 to 5-6 of the second embodiment. In the second embodiment, the organic layer 15B (15B1) is formed over substantially the entire area excluding the opening of the first pixel (R pixel, G pixel) and the cathode contact portion 19C. However, the organic layer 15B (15B1) is formed. The formation region is not limited to this. That is, the formation region of the organic layer 15B (15B1) may be formed so as to cover the end surfaces of the organic layers 15R and 15G in the region between the first pixels (R pixel and G pixel). It is not necessary to cover the entire end face of 15G.

  For example, as shown in FIG. 17A, the first pixels (R pixels, G pixels) are arranged in a row or column (here, column) region, and the cathode contact portion 19C is formed between adjacent openings H1b. In the case of being formed in the region between the organic regions, the organic region is formed over substantially the entire region excluding the columnar region including the first pixel (R pixel, G pixel) and the row region including the cathode contact portion 19C. Layer 15B is formed. Such an organic layer 15B can be formed using, for example, a mask having a slit-like opening called a shadow mask.

  Also, as shown in FIG. 17B, the first pixels (R pixels, G pixels) are arranged in row or column (here, column) regions, respectively, and the cathode contact portions 19C are arranged between adjacent openings H1a. When the organic layer 15B is formed in the region between the organic layers 15B, the organic layer 15B is formed over substantially the entire region excluding the columnar region including the first pixel (R pixel, G pixel).

  Furthermore, as illustrated in FIGS. 17C and 17D, the first pixel (R pixel, G pixel) has a square opening H2a, and the second pixel (B pixel) has a rectangular opening H2b. May be formed. Further, the cathode contact portion 19C may be formed in a region between the openings H2b as shown in FIG. 17C, or is formed at a position adjacent to the opening H2a as shown in FIG. 17D. May be.

  Alternatively, as shown in FIGS. 17E and 17F, when all of the first pixel (R pixel, G pixel) and the second pixel (B pixel) have a square opening H2a, the predetermined shadow By using the mask, the organic layer 15B can be formed in a region excluding each of the row and column regions where the first pixels (R pixels and G pixels) are arranged and the cathode contact portion 19C.

<Modifications 6-1 to 6-7>
FIGS. 18A to 18G show pixel openings and organic layer formation regions according to the modified examples 6-1 to 6-7 of the second embodiment. In the second embodiment, the organic layer 15B (15B1) is formed over substantially the entire area excluding the opening of the first pixel (R pixel, G pixel) and the cathode contact portion 19C. However, the organic layer 15B (15B1) is formed. The formation region is not limited to this. That is, the formation region of the organic layer 15B (15B1) may be formed so as to cover the end surfaces of the organic layers 15R and 15G in the region between the first pixels (R pixel and G pixel). It is not necessary to cover the entire end face of 15G.

  For example, as shown in FIG. 18A, the first pixels (R pixels, G pixels) are arranged in row or column (here, column) regions, respectively, and the cathode contact portion 19C is located between the openings H1b. The organic layer 15B extends over substantially the entire region excluding the columnar region including the first pixels (R pixel and G pixel) and the row region including the cathode contact portion 19C. Is formed. However, in this modified example, the non-formation region 15BL of the organic layer 15B is narrower in the region between the R pixels and the G pixel than in the modified example 5-1 (FIG. 17A). . Thereby, most end surfaces of the organic layers 15R and 15G can be covered with the organic layer 15B. Such an organic layer 15B can also be formed using, for example, a predetermined shadow mask.

  Further, as shown in FIG. 18B, the first pixels (R pixels, G pixels) are respectively arranged in a row-like or column-like (column-like here) region, and the cathode contact portion 19C is located between the R pixels. In this case, the organic layer 15B is formed over substantially the entire region excluding the columnar region including the first pixel (R pixel, G pixel). However, the non-formation region 15BL of the organic layer 15B is narrow in the region between the G pixels where the cathode contact portion 19C is not formed.

  Further, also in this modification, as shown in FIGS. 18C and 18D, the first pixel (R pixel, G pixel) has a square opening H2a, and the second pixel (B pixel) A rectangular opening H2b may be formed. Further, the cathode contact portion 19C may be formed in a region between the adjacent openings H2b as shown in FIG. 18C, or the opening H2a of the first pixel as shown in FIG. 18D. You may form in the adjacent position.

  Alternatively, as shown in FIGS. 18E and 18F, when all of the first pixel (R pixel, G pixel) and the second pixel (B pixel) have a square opening H2a, the predetermined shadow By using the mask, the organic layer 15B can be formed in a region excluding each of the row and column regions where the first pixels (R pixels and G pixels) are arranged and the cathode contact portion 19C.

  In addition, as illustrated in FIG. 18G, a circular opening H3 may be formed in the first pixel (R pixel, G pixel) and the second pixel (B pixel).

  As described above, various layouts of the first pixel, the second pixel, the auxiliary electrode, and the organic layer of the second pixel of the present disclosure can be used. Moreover, it is not limited to the example mentioned above. For example, various layouts can be realized by using the vapor deposition apparatus shown in FIG. 6, a vapor deposition method using a predetermined shadow mask, or a printing technique.

<Application example>
The display devices described in the above embodiments and modifications can be used for electronic devices in various fields that display a video signal input from the outside or a video signal generated inside as a video. In particular, it can be suitably used for medium-sized and small-sized electronic devices. An example is shown below.

  FIG. 19A and FIG. 19B represent the appearance of the smartphone 220. The smartphone 220 includes, for example, a display unit 221 and an operation unit 222 on the front side, a camera 223 on the back side, and the display device 1 according to the above embodiment is mounted on the display unit 221.

  FIG. 20 shows the appearance of the television apparatus 250. For example, the television apparatus 250 includes a main body 251 and a stand 252. The display device 1 according to the above embodiment is mounted on the main body 251.

  FIG. 21A and FIG. 21B show the appearance of the mobile phone 290. The cellular phone 290 is formed by, for example, connecting an upper housing 291 and a lower housing 292 with a connecting portion (hinge portion) 293, and includes a display 294, a sub display 295, a picture light 296, and a camera 297. ing. The display device 1 of the above embodiment is mounted on the display 294 or the sub display 295.

  As described above, the embodiments and modifications have been described, but the present disclosure is not limited to the above-described embodiments and the like, and various modifications can be made. For example, in the above-described embodiment and the like, the R pixel and the G pixel have been described as examples of the first pixel of the present disclosure, and the B pixel has been described as the second pixel. However, a combination of the first and second pixels has been described. Is not limited to this.

  Furthermore, the material, thickness, and the like of each layer described in the above embodiment and the like are not limited to those listed, and may be other materials and thicknesses. In addition, the display device does not have to include all the layers described above, or may include other layers in addition to the layers described above. Moreover, the effect demonstrated in the said embodiment etc. is an example, The effect of this indication may be other effects and may also contain other effects.

The present disclosure may be configured as follows.
(1)
A plurality of pixels each including a light emitting element on a substrate;
The light emitting element includes, in order from the substrate side, a first electrode electrically separated for each pixel, an organic layer including a light emitting layer of any of a plurality of types of light emitting colors, and a second layer. An electrode,
A second organic layer that covers the end face of the first organic layer and is different from the first organic layer is formed in a region between two or more adjacent first pixels among the plurality of pixels. Display device.
(2)
The display device according to (1), wherein the second organic layer includes a constituent material of an organic layer formed in a second pixel having an emission color different from that of the first pixel.
(3)
The end of the second organic layer has a tapered shape,
The display device according to (1) or (2), wherein the second electrode is formed over the entire area of the plurality of pixels.
(4)
A pixel separation film formed on the plurality of first electrodes and having an opening for each pixel facing the first electrode;
The said 2nd organic layer is formed in the area | region except the 1st opening corresponding to a said 1st pixel among several said opening in planar view, Any of said (1)-(3) The display device according to one.
(5)
An auxiliary electrode formed in a selective region on the substrate and electrically connected to the second electrode;
The display device according to (4), wherein the second organic layer is formed in a region excluding the auxiliary electrode and the first opening in a plan view.
(6)
The plurality of first pixels are arranged in a row or column region,
The display device according to (4) or (5), wherein the second organic layer is formed in a region excluding the row or column region in plan view.
(7)
Each display shape of the said pixel separation film is square shape, a rectangular shape, or circular shape. The display apparatus as described in any one of said (4)-(6).
(8)
When forming a plurality of pixels each including a light emitting element on a substrate,
On the substrate, as the light emitting element, a first electrode electrically separated for each pixel, an organic layer including a light emitting layer of any of a plurality of types of light emission colors, and a second electrode And in this order,
After the first organic layer is formed on two or more adjacent first pixels among the plurality of pixels, before the formation of the second electrode, the first organic layer is formed in a region between the first pixels. A method for manufacturing a display device, wherein an end surface of the organic layer is covered and a second organic layer different from the first organic layer is formed.
(9)
The method for manufacturing a display device according to (8), wherein the second organic layer includes a constituent material of an organic layer formed in a second pixel having a light emission color different from that of the first pixel.
(10)
The end portion of the second organic layer has a tapered shape. The method for manufacturing a display device according to (8) or (9).
(11)
After forming the first electrode and before forming the first organic layer, a pixel separation film having an opening for each pixel is formed facing the first electrode,
The said 2nd organic layer is formed in the area | region except the 1st opening corresponding to a said 1st pixel among several said opening in planar view, Any one of said (8)-(10). The manufacturing method of the display apparatus as described in one.
(12)
Forming an auxiliary electrode electrically connected to the second electrode in a selective region on the substrate;
The method for manufacturing a display device according to (11), wherein the second organic layer is formed in a region excluding the auxiliary electrode and the first opening in a plan view.
(13)
The plurality of first pixels are arranged in a row or column region,
The method for manufacturing a display device according to (11) or (12), wherein the second organic layer is arranged in a region excluding the row-like or column-like region in plan view.
(14)
Each opening shape of the said pixel separation film is square shape, a rectangular shape, or circular shape. The manufacturing method of the display apparatus as described in any one of said (11)-(13).
(15)
A plurality of pixels each including a light emitting element on a substrate;
The light emitting element includes, in order from the substrate side, a first electrode electrically separated for each pixel, an organic layer including a light emitting layer of any of a plurality of types of light emitting colors, and a second layer. An electrode,
A second organic layer that covers the end face of the first organic layer and is different from the first organic layer is formed in a region between two or more adjacent first pixels among the plurality of pixels. An electronic device provided with a display device.

  DESCRIPTION OF SYMBOLS 1 ... Display apparatus 10, 10R, 10G, 10B ... Organic EL element, 11 ... 1st board | substrate, 12 ... Planarization film | membrane, 13 ... 1st electrode, 14 ... Pixel separation film | membrane, 15R, 15G, 15B, 15B1 ... Organic Layer 16, second electrode 17, sealing layer 18, second substrate 19, auxiliary electrode 19 C, cathode contact portion, H 1 a, H 1 b, H 2 a, H 2 b, H 3, opening, PIXC, pixel.

Claims (15)

A plurality of pixels each including a light emitting element on a substrate;
The light emitting element includes, in order from the substrate side, a first electrode electrically separated for each pixel, an organic layer including a light emitting layer of any of a plurality of types of light emitting colors, and a second layer. An electrode,
A second organic layer that covers the end face of the first organic layer and is different from the first organic layer is formed in a region between two or more adjacent first pixels among the plurality of pixels. Display device. The display device according to claim 1, wherein the second organic layer includes a constituent material of an organic layer formed in a second pixel having a light emission color different from that of the first pixel. The end of the second organic layer has a tapered shape,
The display device according to claim 1, wherein the second electrode is formed over the entire area of the plurality of pixels. A pixel separation film formed on the plurality of first electrodes and having an opening for each pixel facing the first electrode;
The display device according to claim 1, wherein the second organic layer is formed in a region excluding the first opening corresponding to the first pixel among the plurality of openings in a plan view. An auxiliary electrode formed in a selective region on the substrate and electrically connected to the second electrode;
The display device according to claim 4, wherein the second organic layer is formed in a region excluding the auxiliary electrode and the first opening in a plan view. The plurality of first pixels are arranged in a row or column region,
The display device according to claim 4, wherein the second organic layer is formed in a region excluding the row-shaped or column-shaped region in plan view. The display device according to claim 4, wherein each opening shape of the pixel separation film is a square shape, a rectangular shape, or a circular shape. When forming a plurality of pixels each including a light emitting element on a substrate,
On the substrate, as the light emitting element, a first electrode electrically separated for each pixel, an organic layer including a light emitting layer of any of a plurality of types of light emission colors, and a second electrode And in this order,
After the first organic layer is formed on two or more adjacent first pixels among the plurality of pixels, before the formation of the second electrode, the first organic layer is formed in a region between the first pixels. A method for manufacturing a display device, wherein an end surface of the organic layer is covered and a second organic layer different from the first organic layer is formed. The method for manufacturing a display device according to claim 8, wherein the second organic layer includes a constituent material of an organic layer formed in a second pixel having a light emission color different from that of the first pixel. The manufacturing method of the display device according to claim 8, wherein an end portion of the second organic layer has a tapered shape. After forming the first electrode and before forming the first organic layer, a pixel separation film having an opening for each pixel is formed facing the first electrode,
The method for manufacturing a display device according to claim 8, wherein the second organic layer is formed in a region excluding the first opening corresponding to the first pixel among the plurality of openings in a plan view. Forming an auxiliary electrode electrically connected to the second electrode in a selective region on the substrate;
The method for manufacturing a display device according to claim 11, wherein the second organic layer is formed in a region excluding the auxiliary electrode and the first opening in a plan view. The plurality of first pixels are arranged in a row or column region,
The method for manufacturing a display device according to claim 11, wherein the second organic layer is arranged in a region excluding the row-like or column-like region in plan view. The method for manufacturing a display device according to claim 11, wherein each opening shape of the pixel separation film is a square shape, a rectangular shape, or a circular shape. A plurality of pixels each including a light emitting element on a substrate;
The light emitting element includes, in order from the substrate side, a first electrode electrically separated for each pixel, an organic layer including a light emitting layer of any of a plurality of types of light emitting colors, and a second layer. An electrode,
A second organic layer that covers the end face of the first organic layer and is different from the first organic layer is formed in a region between two or more adjacent first pixels among the plurality of pixels. An electronic device provided with a display device.