DISPLAY DEVICE AND ELECTRONIC DEVICE

Abstract

Display device (10) comprising the following: an organic EL layer (108) formed over a circuit section (102) formed over a substrate (101), wherein an insulating film (103, 104, 107) is arranged between the circuit section (102) and the organic EL layer (108); a cathode electrode (109) formed above the organic EL layer (108) common to all pixels (20); and a contact electrode (106) which is provided at an outer peripheral part of an effective pixel area and electrically connects the cathode electrode (109) to the circuit section (102), wherein the cathode electrode (109) is electrically connected to the contact electrode (106) on an inner side with respect to an end face of a film formation area of ​​the organic EL layer (108), wherein a terminal part of the film-forming area of ​​the organic EL layer (108) a protruding (108 _1) and reset (108 _2 ) shape in one lateral direction, and the cathode electrode (109) on a recessed part of the preceding (108 _1 ) and reset (108 _2 ) Form at the end part of the film formation area of ​​the organic EL layer (108) is electrically connected to the contact electrode (106), and wherein a preceding part of the preceding (108 _1 ) and reset (108 _2 ) The shape at the end part of the film formation area of ​​the organic EL layer (108) has a rectangular shape, a triangular shape or an arc-shaped shape.

Description

[Technical field]

[0001] The present disclosure relates to a display device and an electronic device. [State of the art]

[0002] Of the display devices developed in recent years, flat-panel displays have become the most popular. One type of flat-panel display uses a current-driven electro-optic element, whose luminance varies according to the current flowing through the device, as the light-emitting section (light-emitting element) of a pixel. This current-driven electro-optic element is typically an organic electroluminescent (EL) element, which utilizes the EL of an organic material and the phenomenon of light emission when an electric field is applied to a thin organic film.

[0003] An organic EL display device that uses an organic EL element as the light-emitting section of a pixel generally has a configuration in which an insulating film is provided in a state covering a circuit section formed using thin-film transistors (TFTs) over a substrate, and organic EL elements are arranged and formed over this insulating film. Additionally, a cathode electrode is formed as a top electrode over the organic EL elements, common to all pixels. The cathode electrode should be electrically connected to the circuit section.

[0004] In order to electrically connect the cathode electrode to the circuit section, a configuration was previously assumed in which a contact area is provided on an outer peripheral part of an effective pixel area (display area) and an electrical connection is made between the cathode electrode and the circuit section at the contact area (see, for example, PTL 1). [List of prior art][Patent literature]

[0005] [PTL 1] Japanese Patent, Publication No. JP 2014-199739A.

[0006] US Publication US 2015 / 0144922 A1 describes a common cathode OLED display device connected to the circuit section via contact holes on the outer edge.

[0007] US Disclosure US 2017 / 0141180 A1 discloses an organic EL display device in which the common electrode is contacted by multiple contact areas within the active pixel area.

[0008] International patent application WO 2013 / 065547 A1 describes an organic EL illumination device with symmetrically arranged contact areas accessible via marginal depressions in the organic layer. [Summary][Technical Problem]

[0009] Furthermore, the contact area provided at the outer periphery of the effective pixel area to establish an electrical connection between the cathode electrode and the circuit section is a contributing factor to the width of the display field frame (field periphery edge). A large display field frame width leads to increased manufacturing costs due to a reduction in theoretical yield, and because the design of the display mounting product is limited, its suitability for mechanization as a single device is reduced.

[0010] In view of the foregoing, an objective of the present disclosure is to provide: a display device capable of narrowing the frame of a display field by providing a contact area for electrical connection between a cathode electrode and a circuit section at an outer peripheral part of an effective pixel area, and an electrical device incorporating the display device. [Solution to the problem]

[0011] This is achieved by the present main claim 1 and the dependent claim 5. Further aspects of the present invention will become apparent from the dependent claims, the drawings, and the following description. To achieve the aforementioned objective, a display device is provided according to the present disclosure, comprising the following: an organic EL layer formed over a circuit section formed over a substrate, wherein an insulating film is arranged between the circuit section and the organic EL layer; a cathode electrode that is formed above the organic EL layer, common to all pixels; and a contact electrode provided at an outer peripheral part of an effective pixel area and electrically connects the cathode electrode to the circuit section, wherein The cathode electrode is electrically connected to the contact electrode on an inner surface with respect to an end face of a film-forming region of the organic EL layer. In addition, to achieve the above-mentioned objective, an electronic device according to the present disclosure includes the display device configured as described above.

[0012] The configuration in which the cathode electrode is electrically connected to the contact electrode on an inner side with respect to the end face of the film-forming area of ​​the organic EL layer eliminates the need to fabricate the cathode electrode larger than the film-forming area of ​​the organic EL layer. Consequently, it is unnecessary to additionally account for fabrication variability in the end face of the organic EL layer's film-forming area and fabrication variability in the end face of the cathode electrode's film-forming area. As a result, the area of ​​the contact region required on the outer side of the effective pixel area can be reduced compared to the case where electrical contact between the cathode electrode and the contact electrode is ensured on an outer side with respect to the end face of the organic EL layer's film-forming area. [Advantageous effects of the invention]

[0013] According to the present disclosure, by providing the contact area for the electrical connection between the cathode electrode and the circuit section at an outer peripheral part of the effective pixel area, it is possible to reduce the area of ​​the contact area and thus to narrow the frame of the display field. It is noted that the effects described herein are not limiting and that any of the effects described herein may be present. Furthermore, the effects described herein are merely illustrative and not limiting, and additional effects may be present. [Brief description of the drawings] [ Fig. 1] Fig. Figure 1 is a system configuration diagram that schematically depicts the configuration of an organic EL display device of the active matrix type of the present disclosure. [ Fig. 2] Fig. Figure 2 is a circuit diagram illustrating an example of a circuit configuration of a pixel (pixel circuit) in the organic EL display device of the active matrix type of the present disclosure. [ Fig. 3] Fig. Figure 3 is a section view that shows an example of a section structure of a peripheral section of a display field. [ Fig. 4] Fig. Figure 4 is a sectional view showing an example of a section structure of an organic EL layer. [ Fig. 5] Fig. Figure 5A is a schematic top-view configuration diagram illustrating a contact structure of a cathode electrode according to a prior art example, and Fig. 5B is a sectional view along line AA of Fig. 5A, which depicts a cross-sectional structure. [ Fig. 6] Fig. Figure 6A is a schematic top-view configuration diagram illustrating a contact structure of a cathode electrode according to Example 1. Fig. 6B is a sectional view along line AA of Fig. 6A, which depicts a cross-sectional structure, and Fig. 6C is a sectional view along line BB of Fig. 6A, which depicts a cross-sectional structure. [ Fig. 7] Fig. Figure 7A is a schematic top-view configuration diagram illustrating an example of a different shape of protruding parts of a protruding and recessed shape in a contact structure of a cathode electrode according to Example 2, and Fig. 7B is a schematic top-view configuration diagram illustrating another example of the other form. [ Fig. 8] Fig. Figure 8 is a schematic top-view configuration diagram illustrating a contact structure of a cathode electrode according to Example 3. [ Fig. 9] Fig. 9A is a diagram that depicts a difference in luminous emission luminance associated with a voltage drop difference between a central part and a peripheral part of a display field, and Fig. 9B is a diagram that depicts a difference in luminous emission luminance associated with a difference in distance from a cathode contact electrode to a power supply terminal. [ Fig. 10] Fig. Figure 10 is a schematic top-view configuration diagram illustrating a contact structure of a cathode electrode according to Example 4. [ Fig. 11] Fig. 11A is a front view of a digital single-lens reflex camera with interchangeable lens according to specific Example 1 of an electronic device of the present disclosure, and Fig. 11B is a rear section of it. [ Fig. 12] Fig. Figure 12 is an external view illustrating an example of a head-mounted display according to specific Example 2 of the electronic device of the present disclosure. [Description of the embodiments]

[0014] The embodiments of the technology of this disclosure (hereinafter referred to as "embodiments") are described in detail below with reference to the drawings. The technology of this disclosure is not limited to these embodiments, and the different numerical values, materials, and so forth in the embodiments are for illustrative purposes only. In the following description, identical elements or elements with the same functions are designated by the same reference numerals, and repeated descriptions are omitted. The description is presented in the following order. 1. General description of the display device and the electronic apparatus of the present disclosure 2. Display device of the present disclosure 2-1. System configuration 2-2. Pixel switching 2-3. Sectional structure of the display field 2-4. Contact structure of the cathode electrode 2-5. Example 1 (Display device of the present disclosure) 2-6. Example 2 (Modification of Example 1) 2-7. Example 3 (Modification of Example 1) 2-8. Example 4 (Modification of Example 1) 3. Modifications 4. Electronic device of the present disclosure 4-1. Specific Example 1 (Example of a digital camera) 4-2. Specific Example 2 (Example of a head-mounted display) 5. Configuration that can be assumed from the present disclosure <Allgemeine Beschreibung der Anzeigeeinrichtung und der elektronischen Vorrichtung der vorliegenden Offenbarung>

[0015] In a display device and an electronic device of the present disclosure, an end portion of a film-forming region of an organic EL layer can have a protruding and recessed shape in a lateral direction. In addition, a cathode electrode can be configured such that it is electrically connected to a contact electrode at recessed portions of the protruding and recessed shape at the end portion of the film-forming region of the organic EL layer.

[0016] In the display device and the electronic apparatus of the present disclosure, which incorporate the preferred configurations mentioned above, the projecting portions of the protruding and recessed shape at the end portion of the film-forming region of the organic EL layer can have a rectangular, triangular, or arcuate shape. Furthermore, the spacing between the protruding portions of the projecting and recessed shape at the end portion of the film-forming region of the organic EL layer can vary. In this case, the projecting and recessed shape at the end portion of the film-forming region of the organic EL layer is preferably configured such that the spacing between the protruding portions is dense at a central portion of one side and coarse at the end portions of the side.

[0017] Furthermore, in the display device and the electronic apparatus of the present disclosure, which incorporate the preferred configurations mentioned above, a cathode electrode may have a power supply connection. Additionally, the protruding and recessed shape at the end portion of the film-forming region of the organic EL layer is preferably configured such that the spacing of the protruding portions is coarse on a side closer to the power supply connection of the cathode electrode, and the spacing of the protruding portions is close on a side farther from the power supply connection. <Anzeigeeinrichtung der vorliegenden Offenbarung>

[0018] The display device of the present disclosure is an active-matrix display device in which a current flowing in an electro-optic element is controlled by an active element, for example, an insulated-gate field-effect transistor, which is provided in the same pixel circuit as the electro-optic element. Typical examples of the insulated-gate field-effect transistor include a MOS transistor (MOS: Metal Oxide Semiconductor) and a TFT (Thin Film Transistor).

[0019] Here, an active-matrix organic EL display device, in which a current-driven electro-optic element with a light emission luminance that varies according to a current flowing in a device, for example, an organic EL element, is used as a light emission section (light-emitting element) in a pixel circuit, is assumed as an example in the following description. In the following description, "the pixel circuit" can simply be referred to as "the pixel". [System configuration]

[0020] Fig. Figure 1 is a system configuration diagram that schematically illustrates the configuration of an organic EL display device of the active matrix type of the present disclosure. As in Fig. Figure 1 shows an organic EL display device 10 of the present disclosure comprising a pixel array section 30 in which several pixels 20, which include organic EL elements, are arranged two-dimensionally in a matrix pattern, and a peripheral circuit (peripheral control section) which is arranged in the periphery of the pixel array section 30.

[0021] The peripheral circuitry includes, for example, a write-scan section 40, a drive-scan section 50, and a signal output section 60, and the like, mounted on the same display panel 70 as the pixel array section 30, and controls each of the pixels 20 in the pixel array section 30. It should be noted that a configuration can be assumed in which some or all of the write-scan section 40, the drive-scan section 50, and the signal output section 60 are located outside the display panel 70.

[0022] The substrate of the display field 70 can be an insulating transparent substrate, such as a glass substrate, or a semiconductor substrate, such as a silicon substrate. An organic EL display device that uses a semiconductor substrate, such as a silicon substrate, as the substrate of the display field 70 is generally called a microdisplay (a small display), which is suitablely used for electronic viewfinders of digital cameras, display sections of head-mounted displays, and so on.

[0023] The organic EL display device 10 can be configured for a monochrome (black and white) display or for a color display. If the organic EL display device 10 is configured for a color display, a pixel (unit pixel) as a unit for forming a color image comprises several subpixels. In this case, each of the subpixels corresponds to pixel 20 in Fig. 1. More precisely, in the color display device, a pixel includes, for example, a subpixel that emits red (R) light, a subpixel that emits green (G) light, and a subpixel that emits blue (B) light.

[0024] It should be noted, however, that a pixel is not limited to a combination of the subpixels for the three primary colors of RGB, and furthermore, one or more subpixels for one or more colors can be added to the subpixels for the three primary colors to form a pixel. More specifically, for example, to improve luminance, a subpixel for emitting white (W) light can be added when forming a pixel, or to increase a color rendering range, at least one subpixel for emitting complementary colored light can be added when forming a pixel.

[0025] In the pixel array section 30, scan lines 31 (311 to 31) are defined with respect to the arrangement of the pixels 20 in m rows and n columns. m ) and control lines 32 (321 to 32) m ) along a row direction (the arrangement direction of pixels in a pixel row: horizontal direction) on a pixel row basis. Furthermore, with respect to the arrangement of the pixels 20 in m rows and n columns, signal lines 33 (331 to 33) are arranged. n ) arranged along a column direction (the arrangement direction of pixels in a pixel column: vertical direction) on a pixel column basis.

[0026] Scan lines 311 to 31 m are each connected to the output ends of the corresponding lines of the write-scan section 40. The control lines 321 to 32 m are each connected to the output ends of the corresponding lines of the control scan section 50. Signal lines 331 to 33 nare each connected to the output ends of the corresponding columns of the signal output section 60.

[0027] The write-scan section 40 includes a shift register circuit and the like. This write-scan section 40 performs a so-called line-sequential scan at the time of writing signal voltages from video signals to the pixels 20 of the pixel array section 30, in which the write-scan signals WS (WS1 to WS2) are used. m ) sequentially to scan lines 31 (311 to 31) m ) are supplied in order to scan the pixels 20 of the pixel array section 30 sequentially, line by line.

[0028] The control scan section 50 includes a shift register circuit and the like, similar to the write scan section 40. The control scan section 50 controls the light emission / non-light emission (quenching) of pixel 20 by supplying light emission control signals DS (DS1 to DS2). m) to the control lines 32 (321 to 32) m ) in synchronization with the line-sequential scanning through the write-scan section 40.

[0029] The signal output section 60 selectively outputs a signal voltage V sig a video signal according to luminance information supplied by a (not illustrated) signal supply source (hereinafter sometimes simply described as "signal voltage"), and a reference voltage V ofs off. Here is the reference voltage V. ofs a voltage that serves as a reference for the signal voltage V sig The reference voltage V corresponds to the voltage used for the video signal (for example, a voltage corresponding to a black level of the video signal), or a voltage close to it. ofs is used as an initialization voltage at the time a correction operation is performed.

[0030] The signal voltage V sigor the reference voltage V ofs , which are alternately output by signal output section 60, are transmitted via signal lines 34 (341 to 34) n ) in the unit of the pixel row selected by the line-sequential scanning by the write-scan section 40, is written into the pixel 20 of the pixel array section 30. In other words, the signal output section 60 adopts a line-sequential write drive form in which the signal voltage V sig written in the unit of the pixel line (line). [Pixel circuit]

[0031] Fig. Figure 2 is a circuit diagram illustrating an example of a pixel circuit configuration (a pixel circuit) in the active-matrix organic EL display device 10 of the present disclosure. A light-emitting section of the pixel 20 includes an organic EL element 21. The organic EL element 21 is an example of a current-controlling electro-optic element that has a light-emitting luminance that varies according to a current flowing in a device.

[0032] As in Fig. As illustrated in Figure 2, pixel 20 includes the organic EL element 21 and a drive circuit (pixel drive circuit) that controls the organic EL element 21 by passing a current to the organic EL element 21. The organic EL element 21 has a cathode electrode connected to a common power supply line 34, which is arranged jointly for all pixels 20. In the figure, C elan equivalent capacity of the organic EL element 21.

[0033] The control circuit for controlling the organic EL element 21 includes a control transistor 22, a sampling transistor 23, a light emission control transistor 24, a storage capacitor 25, and an auxiliary capacitor 26. Here, it is assumed that the organic EL element 21 and the control circuit for it are not formed on an insulating body such as a glass substrate, but on a semiconductor substrate such as a silicon substrate, and a configuration using a P-channel transistor as the control transistor 22 is assumed.

[0034] In addition, this example assumes a configuration using the P-channel transistor for the sampling transistor 23 and the light emission control transistor 24, similar to the drive transistor 22. Therefore, the drive transistor 22, the sampling transistor 23, and the light emission control transistor 24 are not of the three-terminal source / gate / drain type, but of the four-terminal source / gate / drain / back-gate type. A power source voltage V dd is attached to the back gate.

[0035] However, it should be noted that the sampling transistor 23 and the light emission control transistor 24 are switching transistors that function as switching elements and are therefore not limited to P-channel transistors. Accordingly, the sampling transistor 23 and the light emission control transistor 24 can be N-channel transistors or transistors in which the P-channel and N-channel types are mixed.

[0036] In pixel 20, which is configured as described above, the sampling transistor 23 samples the signal voltage V sig The signal supplied by the signal output section 60 via the signal line 33 is taken from the power source and written to the storage capacitor 25. The light emission control transistor 24 is connected between a node of the power source voltage V. dd and a source electrode of the control transistor 22 and controls the light emission / non-light emission of the organic EL element 21 under control by a light emission control signal DS.

[0037] The storage capacitor 25 is connected between a gate electrode and the source electrode of the control transistor 22. The storage capacitor 25 holds the signal voltage V written by the sampling by the sampling transistor 23. sigThe control transistor 22 controls the organic EL element 21 by causing a control current to flow in the organic EL element 21 according to the voltage held in the storage capacitor 25.

[0038] The auxiliary capacitor 26 is located between the source electrode of the control transistor 22 and a node with a fixed potential, for example the node of the power source voltage V. dd , switched. This auxiliary capacitor 26 prevents the source potential of the drive transistor 22 from fluctuating when the signal voltage V sig is written, and causes a gate-source voltage V to be applied. gs of the control transistor 22 a threshold voltage V th of the control transistor 22. [Display field layout]

[0039] An example of a section structure of a peripheral edge part of display field 70 is shown in Fig. Figure 3 illustrates this. The display field 70 shown here as an example is what is commonly called a top-emission type display field, in which light of any of the colors R (red), G (green) or B (blue) is emitted from one side of a top surface of the field (a surface on the side facing a substrate 101), by, for example, a combination of a white organic EL element emitting white light and color filters.

[0040] An area above the substrate 101, forming the display field 70, includes an effective pixel area (display area) 101A, in which several pixels 20 are arranged in a matrix pattern and which corresponds to the pixel array section 30, and a peripheral area 101B, located at the periphery (outer edge; outer peripheral side) of the effective pixel area 101A. A pixel drive circuit 102A, comprising the drive transistor 22, the sample transistor 23, the light emission control transistor 24, the storage capacitor 25, and the auxiliary capacitor 26, is provided in the effective pixel area 101A. A peripheral circuit 102B, comprising the write-scan section 40, the drive-scan section 50, and the signal output section 60, is provided in the peripheral area 101B.In addition, a circuit layer 102 including circuit sections of the pixel control circuits 102A and the peripheral circuit 102B and a metal layer 102C is formed over the substrate 101.

[0041] The display field 70 has a stacked structure in which, for example, an inorganic insulating layer 103, an organic insulating layer 104, an anode electrode 105 (including a conductive layer 106 in the same layer), an organic insulating layer 107, an organic EL layer 108, a cathode electrode 109, a protective layer 110, a filler layer (adherent layer) 111, a sealing material 112, and a black matrix layer 113 are stacked sequentially in this order above the circuit layer 102. It should be noted that color filters 115 (see figure) are located in the same layer as the black matrix layer 113. Fig. 4) are provided on a pixel basis. In addition, a sealing substrate 114 is glued onto this stacked structure to seal the stacked structure.

[0042] In the stacked structure mentioned above, the anode electrode 105 and the conductive layer 106 are conductive films formed in the same step using the same material and separated from each other by an opening 115. The two regions are not electrically conductive to each other. Furthermore, the conductive layer 106 is electrically connected at one end, on the side of the anode electrode 105, to the metal layer 102C of the circuit layer 102.

[0043] The metal layer 102C functions as a wiring layer for the circuit sections of the pixel control circuit 102A and the peripheral circuit 102B, and also functions as a wiring layer (electrode) for electrically connecting the cathode electrode 109 to the circuit sections (securing the contact between the cathode electrode 109 and the circuit sections). Fig. 3 is a contact area X extending from an end face of a film-forming region of the organic EL layer 108 to an end face of a film-forming region of the cathode electrode 109, to ensure contact between the conductive layer 106, functioning as a cathode contact electrode, and the cathode electrode 109. For example, simple substances of a metallic element such as aluminum (Al), copper (Cu), and titanium (Ti), or alloys thereof, can be used as the material for the metal layer 102C.

[0044] The inorganic insulating layer 103 is formed essentially uniformly over the circuit layer 102. Inorganic materials such as silicon dioxide (SiO₂) can be used, for example, as the material for the inorganic insulating layer 103. x ), silicon nitride (SiN x ), silicon oxynitride (SiN x O y ), titanium oxide (TiO₂) x ) and aluminum oxide (Al x O y ) be used.

[0045] The organic insulating layers 104 and 107 act as an interpixel insulating layer. Organic insulating layer 104 is located on the lower side of the layer, while organic insulating layer 107 is located on the upper side. The organic insulating layer 104 on the lower side extends over the substrate 101 from the effective pixel region 101A to its outer region (for example, an end portion of the substrate 101 through the peripheral region 101B). The organic insulating layer 107 on the upper side extends from the effective pixel region 101A to a portion of the peripheral region 101B (for example, the peripheral region 101B near the effective pixel region 101A), and its end face is covered with the organic EL layer 108.For example, organic materials such as polyimide, acrylic and novolac resins or siloxanes can be used as the material or materials for the organic insulating layers 104 and 107.

[0046] The anode electrode 105, the organic EL layer 108, and the cathode electrode 109 are arranged in a stacked structure that forms the white organic EL element described above. The anode electrode 105 is provided at the base of pixel 20 of each color in the effective pixel area 101A. Additionally, in the outer region of the effective pixel area 101A (mainly the peripheral region 101B), the anode electrode 105 is formed in an extending manner, and the conductive layer 106, which is intersected by the aperture 115, is formed essentially uniformly. Specifically, the anode electrode 105 and the conductive layer 106 are formed using the same material in the same step. For example, metallic materials such as aluminum (Al) or a stack of ITO (indium tin oxide) and silver (Ag) can be used for the anode electrode 105 and the conductive layer 106.

[0047] The organic EL layer 108 is formed above the conductive layer 106 and the organic insulating layer 107 in such a way that it extends from the effective pixel region 101A to a part of the peripheral region 101B. Details of the specific structure of the organic EL layer 108 will be described later.

[0048] The cathode electrode 109 includes a transparent electrode and is provided in the effective pixel area 101A as a common electrode for pixel 20. Materials such as ITO, IZO (indium zinc oxide), and ZnO (zinc oxide) can be used as the material for the cathode electrode 109.

[0049] The cathode electrode 109 is configured above the substrate 101 such that it extends from the effective pixel region 101A to its outer region (for example, an end part of the peripheral region 102B). Specifically, the cathode electrode 109 is configured in an extended region with respect to the organic EL layer 108, which is provided above the conductive layer 106 by a portion covering an end face of the organic insulating layer 152. In this extended region, the anode electrode 105 and the conductive layer 106 are directly stacked.

[0050] In addition, the cathode electrode 109 is stacked directly on the conductive layer 106 in the peripheral region 101B, as described above. Consequently, in the previously mentioned contact region X, the cathode electrode 109 and the metal layer 102A are electrically connected via the conductive layer 106. If the contact region X is positioned to surround the effective pixel region 101A, a decrease in luminance in a central part of the display area 70 can be limited.

[0051] The protective layer 110 is formed over the cathode electrode 109 and extends continuously to a position on the substrate 101 in such a way that it covers, for example, the end faces of the peripheral circuit 102B, the inorganic insulating layer 103, the organic insulating layer 104, the conductive layer 106, and the cathode electrode 109. The material for this protective layer 110 can be, for example, inorganic materials such as silicon dioxide (SiO₂). x ), silicon nitride (SiN x ), silicon oxynitride (SiN x O y ), titanium oxide (TiO₂) x ) or aluminum oxide (Al x O y ) be used.

[0052] The filler layer 111 is formed essentially uniformly over the protective layer 110 and functions as an adhesive layer. Epoxy resin, acrylic resins, or similar materials can be used as the material for this filler layer 111.

[0053] The sealing material 112 is arranged at an end part (end edge part) of the substrate 101 and serves as a component for sealing each layer between the substrate 101 and the sealing substrate 114 from the outside. Epoxy resin, acrylic resins, or similar materials can also be used as the material for the sealing material 112.

[0054] The sealing substrate 114 seals the white organic EL element together with the filler layer 111 and the sealing material 112. The sealing substrate 114 comprises a material such as glass that is transparent to light of each color emitted by red pixels, green pixels, and blue pixels. On a surface on the side of the substrate 101 of this sealing substrate 114, color filters, including, for example, red filters, green filters, and blue filters, are provided at positions corresponding to the pixels 20, and the black matrix layer 113 is provided as a light-shielding film between the pixels 20.

[0055] As a result, white light emitted by each of the white organic EL elements in the red, green, and blue pixels is transmitted through each of the aforementioned color filters, emitting red, green, and blue light, respectively. Additionally, external light reflected by the red, green, and blue pixels, and by wiring between them, is absorbed, thus improving contrast.

[0056] Details of the specific structure of the organic EL layer 108 are described using Fig. 4 described. Fig. Figure 4 is a sectional view showing an example of a section structure of the organic EL layer 108.

[0057] As in Fig. As illustrated in Figure 4, the organic EL layer 108 has a stacked structure in which a hole injection layer 1081, a hole transport layer 1082, a light-emitting layer 1083, an electron transport layer 1084, and an electron injection layer 1085 are stacked sequentially in that order from the anode electrode 105. Layers other than the light-emitting layer 1082 need to be provided only as required. The hole injection layer 1081 is provided to improve hole injection efficiency and prevent leakage. The hole transport layer 1082 improves the efficiency of hole transfer to the light-emitting layer 1083. The light-emitting layer 1083 generates light through recombination of electrons and holes caused by the application of an electric field.The electron transport layer 1084 is an element for improving the efficiency of electron transfer to the light-emitting layer 1083. The electron injection layer 1085 is an element for improving electron injection efficiency. It should be noted that the material of which the organic EL layer 108 is made is not particularly restricted and generally low-molecular-weight or polymeric organic materials can be used.

[0058] As described above, the organic EL display device 10 according to the present embodiment has a configuration in which the organic insulating layer 104 is provided in a state that covers the circuit section formed above the substrate 101 (the pixel drive circuit 102A and the peripheral circuit 102B), and the organic EL elements 21 are formed above the organic insulating layer 104. The anode electrodes 105, as lower electrodes, are provided on a pixel basis below the organic EL elements 21, whereas the cathode electrode 109, as an upper electrode, is provided above the organic EL elements 21, common to all pixels. [Contact structure of the cathode electrode]

[0059] The cathode electrode 109 should be electrically connected to the circuit section formed above the substrate 101. To implement this electrical connection, in the organic EL display device 10 according to the present embodiment, the contact area X is provided on an outer peripheral part of the effective pixel area (display area) 101A, and the electrical connection of the cathode electrode 109 to the circuit section is established at the contact area X (see Fig. 3) More precisely, the cathode electrode 109 is electrically connected to the metal layer 102C of the circuit layer 102 via the conductive layer 106, which is formed above the organic insulating layer 104 and has the function of a cathode contact electrode.

[0060] The contact area X of the cathode electrode 109 is a contributing factor to the width of a frame (field peripheral edge) of the display field 70. Considering the manufacturing variability of the end surface of the film formation area of ​​the organic EL layer 108 and the end surface of the film formation area of ​​the cathode electrode 109, the frame width should therefore satisfy the following conditions.

[0061] • The organic EL layer 108 necessarily covers the effective pixel area 101A, and the end surface of the film formation area of ​​the organic EL layer 108 is located on the contact area X. This condition serves to prevent a situation in which, under the influence of a step in the circuit layer 102, the cathode electrode 109 suffers from what is commonly called stepping, leading to an electrically open state.

[0062] • The contact area X fulfills a desired width (area) to reduce the contact resistance between the cathode contact electrode (i.e., the conductive layer 106) and the cathode electrode 109.

[0063] The in Fig. Figure 3 shows the contact structure of the cathode electrode 109, which corresponds to an example from the related technique. The example from the related technique for the contact structure of the cathode electrode 109 is described below using the Fig. 5A and Fig. 5B described in more detail. Fig. Figure 5A is a schematic diagram in top view to explain the contact structure of the cathode electrode according to the example of the related technique and Fig. 5B is a sectional view along line AA of Fig. 5A.

[0064] To obtain a frame width that meets the aforementioned conditions, in the contact structure of the cathode electrode, according to the example of the related technique, the cathode electrode 109 is designed to be larger than the film-forming area of ​​the organic EL layer 108 and is designed such that one end portion is chamfered to prevent stepping due to a step in the base. The cathode electrode 109 is electrically connected to the conductive layer 106, which serves as a cathode contact electrode, at the contact area X on the outside with respect to the end face of the film-forming area of ​​the organic EL layer 108.

[0065] In Fig. The outline arrows in 5A represent current paths between the cathode electrode 109 and the cathode contact electrode. In the contact structure of the cathode electrode 109, according to the example of the related technique, the current paths run through the cathode electrode 109 over the organic EL layer 108, and therefore there is no influence of the step in the base and no stepping occurs.

[0066] However, it should be noted that in the contact structure of the cathode electrode 109, according to the example of the related technique, the cathode electrode 109 is formed in a size that is larger than the film formation area of ​​the organic EL layer 108, and the contact of the cathode electrode 109 with the cathode contact electrode on the outside with respect to the end surface of the film formation area of ​​the organic EL layer 108 is secured, and therefore the following problems would occur.

[0067] More precisely, since the manufacturing variability of the end area of ​​the film-forming region of the organic EL layer 108 and the manufacturing variability of the end area of ​​the film-forming region of the cathode electrode 109 should also be taken into account, the area of ​​the contact region X required on the outside of the effective pixel region (display region) 101A becomes large, inevitably increasing the frame width of the display field 70. If the frame width of the display field 70 is large, this leads to an increase in manufacturing costs due to a reduced theoretical yield, and since the design of the display device mounting product is limited, its marketability as a device is reduced.

[0068] In view of this, in the present embodiment, the cathode electrode 109 is electrically connected on its inner side with respect to the end surface of the film-forming region of the organic EL layer 108 to the conductive layer 106, which serves as the cathode contact electrode. Consequently, it is unnecessary for the cathode electrode 109 to be formed in a size larger than the film-forming region of the organic EL layer 108; accordingly, the manufacturing variability of the end surface of the film-forming region of the organic EL layer 108 and the manufacturing variability of the end surface of the film-forming region of the cathode electrode 109 do not need to be additionally taken into account.

[0069] Consequently, the area of ​​the contact region X required on the outside of the effective pixel region 101A can be reduced compared to the case where the contact between the cathode electrode 109 and the cathode contact electrode on the outside is ensured with respect to the end face of the film-forming region of the organic EL layer 108, and it is therefore possible to narrow the frame of the display field 70. Since a narrower frame of the display field 70 increases the theoretical yield, a reduction in manufacturing costs can be achieved, and, since the design limitations of the display device mounting product can be reduced, its marketability as a device can be improved.

[0070] Particularly in the case of a microdisplay (a small display) that uses a semiconductor substrate, such as a silicon substrate, as the substrate of the display field 70, the proportion of the effective pixel area 101A is small relative to the size of the substrate 101 (chip size), and therefore the influence of the size of the outer peripheral part of the effective pixel area 101A becomes significant. From this perspective as well, the present technology, which can narrow the frame of the display field 70, is particularly useful for microdisplays.

[0071] Specific examples of the contact structure of the cathode electrode 109 for reducing the area of ​​the contact region X and for narrowing the frame of the display field 70 are described below. [Example 1]

[0072] Example 1 is an example of the contact structure of the cathode electrode 109 to reduce the area of ​​the contact region X and narrow the frame of the display field 70. A schematic top-view configuration of the contact structure of the cathode electrode 109 according to Example 1 is shown in Fig. 6A illustrates a cross-sectional structure along line AA of Fig. 6A is in Fig. 6B is shown and a section is taken along line BB of Fig. 6A is in Fig. 6C illustrates.

[0073] As from Fig. As can be seen in Figure 6A, the end parts of the film-forming area of ​​the organic EL layer 108 have a projecting and recessed shape (generally called a comb-tooth shape) in lateral directions (vertical and horizontal directions in the figure). In this contact structure, the projecting parts 108 _1The projecting and recessed shape forms a rectangular shape. In other words, the projecting parts are 108 _1 shaped so that their side faces are perpendicular to the effective pixel area 101A.

[0074] In addition, the cathode electrode 109 is the same size as the film-forming area of ​​the organic EL layer 108. In other words, the film-forming area of ​​the cathode electrode 109 and the film-forming area of ​​the organic EL layer 108 are the same size in this example. However, it should be noted that the film-forming area of ​​the cathode electrode 109 does not have to be the same size as the film-forming area of ​​the organic EL layer 108 and may be smaller.

[0075] In the contact structure, in which the end parts of the film-forming region of the organic EL layer 108 have a protruding and recessed shape, the cathode electrode 109 is electrically connected to the cathode contact electrode (conducting layer 106) on the inside with respect to the end surfaces of the film-forming region of the organic EL layer 108 (upper surfaces of the protruding parts 108). _1 ), more precisely on the reset parts 108 _2 the preceding and recessed form, connected.

[0076] Since the end parts of the film-forming region of the organic EL layer 108 are manufactured to have the protruding and recessed shape, and the cathode electrode 109 is manufactured to have the recessed parts 108 _2Electrically connected to the cathode contact electrode as described above, the cathode electrode 109 can be formed in a size equal to or smaller than the size of the film-forming area of ​​the organic EL layer 108. Consequently, the area of ​​the contact region X can be reduced by the amount by which the cathode electrode 109 projects from the end face of the film-forming area of ​​the organic EL layer 108 to the outside, provided that contact between the cathode electrode 109 and the cathode contact electrode on the outside is ensured with respect to the end face of the film-forming area; therefore, it is possible to narrow the frame of the display field 70. Furthermore, since the current paths through the cathode electrode 109 run over the organic EL layer 108, no stepping would occur. These operations and effects apply equally to the following examples. [Example 2]

[0077] Example 2 is a modification of Example 1 and is another form example of the preceding parts 108 _1 of the protruding and recessed shape at the end part of the film-forming area of ​​the organic EL layer 108. An example of the other shape of the protruding parts 108 _1 the protruding and recessed shape in the contact structure of the cathode electrode according to Example 2 is in Fig. 7A is shown and another example of the other form is in Fig. 7B shown.

[0078] In Example 1, the preceding parts show 108 _1 a rectangular shape, whereas in the Fig. 7A illustrated example the preceding parts 108 _1 have a triangular shape. In other words, the foregoing parts are 108 _1 shaped such that their side faces are inclined relative to the effective pixel area 101A. In the Fig. The example shown in 7B indicates that the preceding parts 108 _1 an arc-shaped form including circular and elliptical arc shapes.

[0079] With the foregoing parts 108 _1 , which, as described above, have a triangular or arc-shaped form, the peripheral length of the film-forming ends (the end parts of the film-forming area) of the organic EL layer 108 can be extended compared to the case where the aforementioned parts 108 _1They have a rectangular shape. Since the peripheral length of the film-forming ends of the organic EL layer 108 can be extended, the width of the current paths is increased and the resistance in the current paths can be reduced, thereby limiting the voltage drop in the organic EL elements 21. As a result, a reduction in the drive voltage for the organic EL elements 21 can be implemented, and the overall power consumption of the organic EL display device 10 can be reduced. [Example 3]

[0080] Example 3 is a modification of Example 1 and is an example where the protruding and recessed shape at the end part of the film-forming region of the organic EL layer 108 represents a variation in the density of the spacing of the protruding parts 108. _1according to the position of one side of the film-forming area of ​​the organic EL layer 108, which has a rectangular shape. A schematic top-view configuration of the contact structure of the cathode electrode 109 according to Example 3 is shown in Fig. 8 shown.

[0081] In the contact structure of the cathode electrode 109 according to Example 1, the distance between the protruding parts 108 _1 constant, whereas in the contact structure of the cathode electrode 109 according to Example 3 there is a variation in the density of the distance between the protruding parts 108 _1 along each side of the film-forming area of ​​the organic EL layer 108, which has a rectangular shape. More precisely, in each side of the film-forming area of ​​the organic EL layer 108, which has a rectangular shape, the distance between the protruding parts 108 _1 at a central part of one side, and the distance between the protruding parts becomes 108 _1coarser towards the end parts of the page.

[0082] In display field 70, the voltage drop increases as one approaches the center of the field. As in Fig. As shown in 9A, the luminous emission luminance in a central field area is therefore reduced in the display field 70 compared to the luminous emission luminance in a peripheral field area.

[0083] On the other hand, for example, by stipulating that the distance between the protruding parts is 108 _1 at a central part of each side of the film-forming area of ​​the organic EL layer 108, which has a rectangular shape, is dense, and specifying that the distance between the protruding parts 108 _1To be more precise, when moving towards the end parts of the page, the peripheral length of the film-forming end of the organic EL layer 108 is made longer in the central part of the page than in the end parts. As a result, the width of the current paths in the central part of the page is made greater than in the end parts, and the resistance in the current paths can be reduced. Consequently, the voltage drop difference between the central part of the page and the end parts can be reduced, which makes it possible to achieve a uniformity of the light emission luminance across the entire surface of the display field 70.

[0084] It should be noted that one application of the present disclosure relates to the contact structure of the cathode electrode 109 according to Example 1, in which the shape of the preceding parts 108 _1having a rectangular shape, which was assumed as an example in Example 3, but the present disclosure is equally applicable to the contact structure of the cathode electrode 109 according to Example 2, where the shape of the preceding parts 108 _1 It is a triangular shape or an arc-shaped shape.

[0085] By stipulating that the shape of the foregoing parts 108 _1 at the central part of the side in the contact structure of the cathode electrode 109 according to Example 1, where the distance between the protruding parts 108 _1 If the shape is constant, a triangular shape, or an arc shape instead of a rectangular shape, the same operations and effects as in Example 3 can be obtained. In particular, by specifying that the shape of the foreground parts 108 _1at the end parts of each side of the film-forming area of ​​the organic EL layer 108, which has a rectangular shape, is a rectangular shape, while it is set that the shape of the protruding parts 108 _1 If the central part of the page has a triangular or arc-shaped form, the peripheral length of the film-forming end of the organic EL layer 108 is made longer at the central part of the page than at the end parts of the page. Accordingly, the same operations and effects as in Example 3 can be obtained. [Example 4]

[0086] Example 4 is a modification of Example 1 and is an example where the protruding and recessed shape at the end part of the film-forming region of the organic EL layer 108 represents a variation in the density of the spacing of the protruding parts 108. _1according to the distance from a power supply terminal to the cathode contact electrode. A schematic top-view configuration of the contact structure of the cathode electrode 109 according to Example 3 is shown in Fig. 10 shown.

[0087] As in Fig. Figure 10 shows that the conductive layer 106, which serves as a cathode contact electrode, has, for example, two power supply connections 106. _1 and 106 _2 on, which are electrically connected to a power source section (including ground connection) in the outer area of ​​the display field 70. In the display field 70, where the cathode contact electrode connects to the power source supply terminals 106 _1 and 106 _2 exhibits, the voltage drop increases further away from the power source supply terminals 106 _1 and 106 _2 to; therefore, in the display field 70, as in Fig. Figure 9B shows a luminous emission luminance on one side further away from the power supply connections 106 _1 and 106 _2 compared to the luminous emission luminance on one side closer to the power supply connections 106 _1 and 106 _2 reduced.

[0088] On the other hand, in the contact structure of the cathode electrode 109 according to Example 4, in the protruding and recessed form of the film formation area of ​​the organic EL layer 108, the distance between the protruding parts 108 _1 on one side closer to the power supply connections 106 _1 and 106 _2 as roughly set, whereas the distance between the protruding parts is 108 _1 on one side further away from the power supply connections 106 _1 and 106 _2as densely set. As a result, the peripheral length of the film-forming end of the organic EL layer 108 on the side bordered by the power source supply terminals 106 can be _1 and 106 _2 The cables on the farther side are made longer than those on the nearer side, thereby increasing the width of the current paths on the farther side compared to the nearer side and reducing the resistance in the current paths. Consequently, a voltage drop difference between the nearer and farther sides with respect to the power source supply terminals 106 can be achieved. _1 and 106 _2 This is reduced, thereby achieving a uniformity of the light emission luminance over the entire part of the field surface of the display field 70.

[0089] It should be noted that although in one case the conductive layer 106, which serves as a cathode contact electrode, the power source supply terminals 106 _1 and 106 _2 on one side (in Fig. 10 of the upper side) of the display field 70, which has been assumed here as an example, there are cases where the power source supply connections 106 _1 and 106 _2 on two sides (in Fig. 10 of the upper and lower sides) of the display field 70 are present. In this case, for example, it is preferable to adjust the distances of the protruding parts 108. _1 to determine the same distances between the upper and lower sides of the display field 70 and to specify that the distances between the protruding parts 108 _1 on the right side and the left side of the display field 70, the central part of the page is dense, while the end sides of the page are coarse.

[0090] In addition, although one application of the present disclosure relates to the contact structure of the cathode electrode 109 according to Example 1, in which the shape of the preceding parts 108 _1 which has a rectangular shape, as assumed in Example 4 as an example, the present disclosure is also applicable to the contact structure of the cathode electrode 109 according to Example 2, in which the shape of the preceding parts 108 _1 It is a triangular shape or an arc-shaped shape.

[0091] Furthermore, in the contact structure of the cathode electrode 109 according to Example 1, where the distance between the protruding parts 108 _1 is constant by specifying that the shape of the preceding parts 108 _1 on one side further away from the power supply connections 106 _1 and 106 _2If a triangular or arc-shaped form is used instead of a rectangular form, the same operations and effects as in Example 4 can be obtained. In particular, by specifying that the shape of the foregoing parts 108 _1 closer to the power supply connections on the side 106 _1 and 106 _1 a rectangular shape, while it is specified that the shape of the protruding parts 108 _1 on the more distant side is a triangular or arc-shaped form, the peripheral length of the film-forming end of the organic EL layer 108 on the side that is further from the power source supply connections 106 _1 and 106 _2 The longer side is located than the one on the nearer side. Accordingly, the same operations and effects can be obtained as in Example 4. <modifikationen>

[0092] While the technology of the present disclosure has been described above based on preferred embodiments, the technology of the present disclosure is not limited to the embodiments described above. The configurations and structures of the display device described in the embodiments described above are illustrative and can be modified as required. For example, while it is assumed that the organic EL elements 21 and the drive circuits therefor are formed over a semiconductor such as silicon in the embodiments described above, this is not limiting, and it is possible to form them over an insulating material such as glass.

[0093] In addition, while the Fig. While the circuit configuration shown in Figure 2 illustrates an example of the pixel circuit in the embodiments described above, this is not limiting and it is possible, for example, to add transistors as needed. For instance, it is possible to connect a switching transistor between a drain electrode of the driver transistor 22 and a current discharge target node (for example, the common power source line 34) and to control the switching transistor such that the organic EL element 21 does not emit light during a non-light-emission period of the pixel 20. <Elektronische Vorrichtung der vorliegenden Offenbarung>

[0094] The display device described above in this disclosure can be used as a display section (a display device) for electronic devices in any field where a video signal inputted to or generated in an electronic device is displayed as an image or a video image. Examples of such electronic devices include television sets, notebook personal computers, digital cameras, portable terminal devices such as mobile phones, and head-mounted displays. However, it should be noted that these examples are not limiting.

[0095] As described above, the following effects can be achieved by using the display device of the present disclosure as a display section of an electronic device in any field. In particular, according to the display device of the present disclosure, the frame of a display field can be narrowed. Therefore, by using the display device of the present disclosure, it is possible to contribute to a reduction in the size of a main body of an electronic device.

[0096] The display device of the present disclosure includes those in a modular form having a sealed configuration. A relevant example is a display module formed by gluing a counterpart, such as a transparent glass, onto a pixel array section. It should be noted that the display module may be equipped with a circuit section or a flexible printed circuit (FPC) for inputting / outputting signals and the like from outside the pixel array section. A digital camera and a head-mounted display are described below as specific examples of an electronic device using the display device of the present disclosure. However, it should be noted that the specific examples described here are only examples and are not limiting. (Specific Example 1)

[0097] Fig. 11 depicts external views of a digital single-lens reflex camera with interchangeable lens according to specific Example 1 of the electronic device of the present disclosure, wherein Fig. 11A is a front view of it and Fig. 11B is a rear elevation of it.

[0098] The digital single-lens reflex type camera with interchangeable lens according to specific example 1 includes, for example, an interchangeable lens unit (an interchangeable lens) 212 on the right side of the front of a main body section (camera body) 211 and a grip section 213 on the left side of the front, which is to be grasped by the photographer.

[0099] In addition, a monitor 214 is provided essentially in the center of the rear of the main camera body section 211. An electronic viewfinder (eyepiece window) 215 is provided at the top of the monitor 214. By looking through the electronic viewfinder 215, the photographer can visually perceive an optical image of a subject being directed through the photographic lens unit 212 and can determine a composition.

[0100] In the single-lens reflex digital camera with interchangeable lens, configured as described above, the display device of the present disclosure can be used as the electronic viewfinder 215. In other words, the single-lens reflex digital camera with interchangeable lens according to specific Example 1 is manufactured using the display device of the present disclosure as its electronic viewfinder 215. [Specific Example 2]

[0101] Fig. Figure 12 is an external view illustrating an example of a head-mounted display according to specific Example 2 of the electronic device of the present disclosure.

[0102] A head-mounted display 300 according to specific Example 2 is configured as a head-mounted display of the transmission type, comprising a main body section 301, an arm section 302, and a lens tube 303. The main body section 301 is connected to the arm section 302 and a pair of glasses 310. More precisely, an end portion is attached to the arm section 302 along the longitudinal direction of the main body section 301. In addition, one side of a lateral surface of the main body section 301 is connected to the glasses 310 via a connecting element (not illustrated). It should be noted that the main body section 301 can be attached directly to a human head.

[0103] The main body section 301 contains a control substrate for controlling the operation of the head-mounted display 300 and a display section. By linking the main body section 301 and the lens tube 303, the arm section 302 supports the lens tube 303 relative to the main body section 301. In particular, the arm section 302 fixes the lens tube 303 to the main body section 301 by being coupled to an end portion of the main body section 301 and an end portion of the lens tube 303. In addition, the arm section 302 contains a signal line for transmitting data relating to an image supplied from the main body section 301 to the lens tube 303.

[0104] The lens tube 303 projects image light, supplied by the main body section 301 through the arm section 302, through a lens 311 in the goggles 310 to the user's eye, to which the head-mounted display 300 is attached.

[0105] In the head-mounted display 300 configured as described above, the display device of the present disclosure can be used as the display section contained in the main body section 301. In other words, the head-mounted display 300 is manufactured according to specific Example 2 using the display device of the present disclosure as its display section. <Konfigurationen, die durch die vorliegende Offenbarung angenommen werden können>

[0106] It should be noted that the present disclosure can also take the following configurations. <<A. Anzeigeeinrichtung> >

[0107] [A-1] A display device comprising the following: an organic EL layer formed over a circuit section formed over a substrate, wherein an insulating film is arranged between the circuit section and the organic EL layer; a cathode electrode that is formed above the organic EL layer, common to all pixels; and a contact electrode provided at an outer peripheral part of an effective pixel area and electrically connects the cathode electrode to the circuit section, wherein The cathode electrode is electrically connected to the contact electrode on an inner side with respect to an end surface of a film formation area of ​​the organic EL layer.

[0108] [A-2] The display device as described in paragraph [A-1] above, wherein an end part of the film-forming area of ​​the organic EL layer has a protruding and recessed shape in a lateral direction, and The cathode electrode is electrically connected to the contact electrode at a recessed part of the protruding and recessed shape at the end part of the film formation area of ​​the organic EL layer.

[0109] [A-3] The display device as described in paragraph [A-2] above, wherein a projecting part of the projecting and recessed shape at the end part of the film-forming area of ​​the organic EL layer has a rectangular shape, a triangular shape or an arc-shaped shape.

[0110] [A-4] The display device as described in paragraph [A-2] or [A-3] above, wherein In the protruding and recessed form at the end part of the film formation area of ​​the organic EL layer, the distance between the protruding parts varies in density.

[0111] [A-5] The display device as described in paragraph [A-4] above, wherein In the protruding and recessed form at the end part of the film formation area of ​​the organic EL layer, the distance between the protruding parts at a central part of one side is close and the distance between the protruding parts at the end parts of the side is coarse.

[0112] [A-6] The display device as described in paragraph [A-4] above, wherein the cathode electrode has a power supply connection and In the foreground and recessed form at the end part of the film formation area of ​​the organic EL layer, the distance between the protruding parts on a side closer to the power supply connection of the cathode electrode is coarse, and the distance between the protruding parts on a side farther from the power supply connection is narrow. <<B. Elektronische Vorrichtung> >

[0113] [B-1] An electronic device comprising a display device, wherein the display device comprises: an organic EL layer formed over a circuit section formed over a substrate, wherein an insulating film is arranged between the circuit section and the organic EL layer; a cathode electrode that is formed above the organic EL layer, common to all pixels; and a contact electrode provided at an outer peripheral part of an effective pixel area, electrically connecting the cathode electrode and the circuit section, wherein The cathode electrode is electrically connected to the contact electrode on an inner side with respect to an end surface of a film formation area of ​​the organic EL layer.

[0114] [B-2] The electronic device as described in paragraph [B-1] above, wherein an end part of the film-forming area of ​​the organic EL layer has a protruding and recessed shape in a lateral direction, and The cathode electrode is electrically connected to the contact electrode at a recessed part of the protruding and recessed shape at the end part of the film formation area of ​​the organic EL layer.

[0115] [B-3] The electronic device as described in paragraph [B-2] above, wherein a projecting part of the projecting and recessed shape at the end part of the film-forming area of ​​the organic EL layer has a rectangular shape, a triangular shape or an arc-shaped shape.

[0116] [B-4] The electronic device as described in paragraph [B-2] or [B-3] above, wherein In the protruding and recessed form at the end part of the film formation area of ​​the organic EL layer, the distance between the protruding parts varies in density.

[0117] [B-5] The electronic device as described in paragraph [B-4] above, wherein In the protruding and recessed form at the end part of the film formation area of ​​the organic EL layer, the distance between the protruding parts at a central part of one side is close and the distance between the protruding parts at end parts of the side is coarse.

[0118] [B-6] The electronic device as described in paragraph [B-4] above, wherein the cathode electrode has a power supply connection and In the foreground and recessed form at the end part of the film formation area of ​​the organic EL layer, the distance between the protruding parts on a side closer to the power supply connection of the cathode electrode is coarse, and the distance between the protruding parts on a side farther from the power supply connection is narrow. [List of reference symbols]

[0119] 10 ... Organic EL display device, 20 ... Pixel (pixel circuit), 21 ... Organic EL element, 22 ... Driver transistor, 23 ... Sampling transistor, 24 ... Light emission control transistor, 25 ... Storage capacitor, 26 ... Auxiliary capacitor, 30 ... Pixel array section, 40 ... Write-scan section, 50 ... Driver-scan section, 60 ... Signal output section, 70 ... Display area, 101 ... Substrate, 101A ... Effective pixel area (display area), 101B ... Peripheral area, 102 ... Circuit layer, 102A ... Pixel driver circuit, 102B ... Peripheral circuit, 103 ... Inorganic insulating layer, 104 ... Organic insulating layer, 105 ... Anode electrode (bottom electrode), 106 ... Conductive layer (cathode contact electrode) 106_1, 106_2 ... Power source supply connection, 107 ... Organic insulating layer, 108 ... Organic EL layer, 108_1 ... Protruding part of the protruding and recessed shape, 108_2 ...Recessed part of the protruding and recessed form, 109 ... Cathode electrode (upper electrode), 110 ... Protective layer, 111 ... Filler layer (adhesion layer), 112 ... Sealing agent, 113 ... Black matrix layer, 114 ... Sealing substrate, 115 ... Color filter.< / modifikationen>

Claims

[1] Display device (10) comprising the following: an organic EL layer (108) formed over a circuit section (102) formed over a substrate (101), wherein an insulating film (103, 104, 107) is arranged between the circuit section (102) and the organic EL layer (108); a cathode electrode (109) formed above the organic EL layer (108) common to all pixels (20); and a contact electrode (106) which is provided at an outer peripheral part of an effective pixel area and electrically connects the cathode electrode (109) to the circuit section (102), wherein the cathode electrode (109) is electrically connected to the contact electrode (106) on an inner side with respect to an end face of a film formation area of ​​the organic EL layer (108), wherein a terminal part of the film-forming area of ​​the organic EL layer (108) a protruding (108 _1) and reset (108 _2 ) shape in one lateral direction, and the cathode electrode (109) on a recessed part of the preceding (108 _1 ) and reset (108 _2 ) Form at the end part of the film formation area of ​​the organic EL layer (108) is electrically connected to the contact electrode (106), and wherein a preceding part of the preceding (108 _1 ) and reset (108 _2 ) The shape at the end part of the film formation area of ​​the organic EL layer (108) has a rectangular shape, a triangular shape or an arc-shaped shape. [2] Display device (10) according to claim 1, wherein in the preceding (108 _1 ) and reset (108 _2 ) Form at the end part of the film formation area of ​​the organic EL layer (108) a distance between the protruding parts (108 _1 ) varies in density. [3] Display device (10) according to claim 2, wherein in the preceding (108 _1 ) and reset (108 _2 ) Shape at the end part of the film formation area of ​​the organic EL layer (108) the distance of the protruding parts (108 _1 ) is dense at a central part of one side and the distance between the protruding parts (108 _1 ) is rough at the ends of the page. [4] Display device (10) according to claim 2, wherein the cathode electrode (109) a power supply connection (106) _1 , 106 _2 ) exhibits and in the preceding (108 _1 ) and reset (108 _2 ) Shape at the end part of the film formation area of ​​the organic EL layer (108) the distance of the protruding parts (108 _1 ) on a side that is closer to the power source supply connection (106 _1 , 106 _2 ) the cathode electrode (109) is located, is coarse, and the distance between the protruding parts (108)_1 ) on one side, which is connected to the power source supply (106 _1 , 106 _2 ) is further away, is dense. [5] Electronic device comprising a display device (10), wherein the display device (10) includes the following: an organic EL layer (108) formed over a circuit section (102) formed over a substrate (101), wherein an insulating film (103, 104, 107) is arranged between the circuit section (102) and the organic EL layer (108); a cathode electrode (109) formed above the organic EL layer (108) common to all pixels (20); and a contact electrode (106) which is provided at an outer peripheral part of an effective pixel area and electrically connects the cathode electrode (109) and the circuit section (102), wherein the cathode electrode (109) is electrically connected to the contact electrode (106) on an inner side with respect to an end surface of a film formation area of ​​the organic EL layer (108), wherein a terminal part of the film-forming area of ​​the organic EL layer (108) a protruding (108 _1 ) and reset (108 _2 ) shape in one lateral direction, and the cathode electrode (109) on a recessed part of the preceding (108 _1 ) and reset (108 _2 ) Form at the end part of the film formation area of ​​the organic EL layer (108) is electrically connected to the contact electrode (106), and wherein a preceding part of the preceding (108 _1 ) and reset (108 _2 ) The shape at the end part of the film formation area of ​​the organic EL layer (108) has a rectangular shape, a triangular shape or an arc-shaped shape.

Images