JP5964801B2 - Display panel device and electronic device - Google Patents

Description

  The present invention relates to a display panel device having an image display function and an electronic apparatus including the display panel device.

In recent years, as an example of a display panel device, an organic EL display panel device having a display panel in which a plurality of organic EL elements are provided on a substrate is becoming widespread. The organic EL display panel device has characteristics such as high visibility because an organic EL element that performs self-luminescence is used as a display element, and excellent impact resistance because the organic EL element is a complete solid element.
The organic EL element is a current-driven light-emitting element, and includes a plurality of organic functional layers such as an organic light-emitting layer that performs an electroluminescence phenomenon by recombination of carriers (electrons and holes) between an anode and a cathode electrode pair. These functional layers are laminated. In addition to the organic light emitting layer, the organic functional layer was injected from an electron injection layer for injecting electrons into the organic light emitting layer, a hole injection layer for injecting holes into the organic light emitting layer, and an electron injection layer There are an electron transport layer that transports electrons to the organic light emitting layer, a hole transport layer that transports holes injected from the hole injection layer to the organic light emitting layer, and the like. Further, in the organic EL display panel device, the organic EL elements corresponding to the respective colors of red (R), green (G), and blue (B) are subpixels, and a combination of three subpixels of R, G, and B is used. This corresponds to one pixel (one pixel).

  A configuration of a conventional display panel device is shown in FIG. As shown in FIG. 17, the display panel device 901 includes a rectangular display panel 910 and a drive control unit 920 connected thereto. The display panel 910 is an organic EL display panel, in which a plurality of organic EL elements are provided on the substrate in a matrix along the X direction and the Y direction, and an area where the organic EL elements are provided is a display area. It has become. In the display area on the substrate, a plurality of source lines are provided along the X direction, and a plurality of gate lines are provided along the Y direction. The drive control unit 920 includes four drive circuits 921 to 924 and a control circuit 925. The drive circuits 921 to 924 include two drive circuits 921 and 922 connected to the source wiring, and two drive circuits 923 and 924 connected to the gate wiring, and each of the drive circuits 921 to 924 is a display panel 4. It is arranged along the side.

JP 2011-71139 A

  By the way, the display panel device has been increasingly diversified as the thickness of the display panel device is reduced. For example, a thin display panel device is used for a wristwatch-type electronic device, an automobile instrument panel (instrument panel), an electronic advertisement (digital signage), and the like. A display panel device is used. There is a need for an irregular display panel device having a non-rectangular display area, such as a circle, a semicircle, an ellipse, a triangle, or a pentagon or more polygon, depending on the application.

However, if the circuit layout and the element configuration similar to those of the related art are adopted for the odd-shaped display panel device, the display performance of the display panel device may be impaired.
Accordingly, an object of the present invention is to provide a display panel device in which display performance is not easily impaired even if the shape is modified.

  A display panel device according to an embodiment of the present invention includes a plurality of display elements provided in a matrix along the X direction and the Y direction on a substrate, and a display provided with the plurality of display elements on the substrate. A power supply trunk line provided in a region adjacent to the region and electrically connected to the plurality of display elements via a plurality of power supply lines extending in the X direction in the display region, and the plurality of displays The element is composed of a first display element located at an end of a first display element array composed of a plurality of display elements arranged in the X direction, and a plurality of display elements arranged in the X direction. A second display element located at an end of the second display element row adjacent to the display element row in the Y direction, and a position in the X direction of the first display element is a position in the X direction of the second display element. Unlike the first display element and the power source Interval in the X direction of the lines is substantially the same as the X-direction distance of the main power line and the second display element.

  In the display panel device according to one embodiment of the present invention, the distance between the first display element and the power supply trunk line in the X direction is substantially the same as the distance between the second display element and the power supply trunk line in the X direction. Thereby, the voltage drop in the power supply lead line between the power supply trunk line and the first display element and the voltage drop in the power supply lead line between the power supply trunk line and the second display element can be made substantially the same. The display performance can be made difficult to be impaired.

The top view which shows the display panel apparatus which concerns on embodiment of this invention. The enlarged plan view which shows the area | region A enclosed with the dashed-two dotted line in FIG. 1 is a schematic cross-sectional view illustrating a display panel according to an embodiment of the present invention. FIG. 6 is a diagram showing an equivalent circuit of a subpixel according to the present embodiment. The schematic plan view which shows the path | route of data wiring, selection wiring, and power supply wiring. The schematic diagram which shows the path | route of data wiring, selection wiring, and power supply wiring for every hierarchy. The enlarged view which shows the area | region C enclosed with the dashed-two dotted line in FIG. Schematic plan view showing a modification of the shape of the main power line Schematic plan view showing a modification of the shape of the main power line Schematic plan view showing a variation of the wiring width of the power lead-in wire Schematic plan view showing a modification of the shape of the display area Schematic plan view showing a modification of the shape of the display area The perspective view which shows the electronic device which concerns on embodiment of this invention The partially broken perspective view which shows the electronic device which concerns on embodiment of this invention Sectional drawing which shows the electronic device which concerns on embodiment of this invention The schematic end view which shows a part of manufacturing process of the display panel apparatus which concerns on embodiment of this invention. Schematic configuration diagram of a conventional display panel device

  A display panel device according to one embodiment of the present invention includes a plurality of display elements provided in a matrix along the X direction and the Y direction on a substrate, and a display region provided with the plurality of display elements on the substrate. A plurality of display elements, and a plurality of display elements that are electrically connected to the plurality of display elements via a plurality of power supply lines extending in the X direction within the display area. Is composed of a first display element located at an end of a first display element array composed of a plurality of display elements arranged in the X direction, and a plurality of display elements arranged in the X direction. A second display element positioned at an end of the second display element row adjacent to the element row in the Y direction, and the X direction position of the first display element is different from the X direction position of the second display element. The first display element and the main power line Direction interval is substantially the same as the X-direction distance of the main power line and the second display element. Thereby, even if it is deformed, the display performance can be made difficult to be impaired.

  The plurality of display elements are further configured by a plurality of display elements arranged in the X direction, and are adjacent to the opposite side of the first display element array with the second display element array interposed therebetween. A third display element located at an end of the column, wherein the position of the third display element in the X direction is different from the position of the first display element in the X direction, and the third display element, the first display element, The X-direction distance between the third display element and the second display element is different from the X-direction distance, and the X-direction distance between the third display element and the power supply trunk line is the first display. The interval between the element and the power supply trunk line in the X direction may be substantially the same.

  The power supply trunk line includes a first region located on the X direction side of the first display element and a second region located on the X direction side of the second display element, and the display region of the first region The position of the end on the side is substantially the same distance as the distance in the X direction between the first display element and the second display element with respect to the position of the end of the second area on the display area side. It may be displaced in the X direction.

  The power supply trunk line includes a first region located on the X direction side of the first display element and a second region located on the X direction side of the second display element, and the display region of the power supply trunk line The shape of the opposite end may be a curved shape or a bent shape bent at an obtuse angle in the region including the first region and the second region. Thereby, when a protective film is provided on the power supply trunk line, the sealing performance of the protective film can be improved.

  The power supply trunk line includes a first region located on the X direction side of the first display element and a second region located on the X direction side of the second display element, and the display region side of the power supply trunk line The shape of the end portion of the power supply main line and the shape of the end portion of the power supply trunk line opposite to the display region are both bent in the region including the first region and the second region, and the power supply trunk line The bending angle of the bent shape at the end opposite to the display area may be larger than the bending angle of the bent shape on the display area side of the power supply trunk line. Accordingly, when a protective film is provided on the power supply trunk line, the bending angle of the bent shape at the end of the power supply trunk line opposite to the display area is the same as the bending shape of the power supply trunk line on the display area side. The sealing property of the protective film can be improved as compared with the case where the angle of bending is the same.

  The power supply main line includes a first region located on the X direction side of the first display element and a second region located on the X direction side of the second display element, and the substrate includes the first region. A region located on the X direction side and a region located on the X direction side of the second region have a curved outer peripheral shape, and the shape of the end of the power supply trunk line on the side opposite to the display region is The region including the first region and the second region may have a curved shape along the outer peripheral shape of the substrate. Thereby, when the protective film is provided on the power supply trunk line and the protective film reaches the end of the substrate, the sealing performance of the protective film can be improved.

Furthermore, a dummy display element that is not electrically connected to the power supply trunk line may be provided between the power supply trunk line and the display area.
The plurality of power supply lines include a first power supply line and a second power supply line having a shorter length in the X direction than the first power supply line, and a cross-sectional area of the first power supply line is the second power supply line. It may be larger than the cross-sectional area of the power lead-in wire. Thereby, the voltage drop in the first power supply lead line and the voltage drop in the second power supply lead line can be made uniform, and as a result, the display performance can be further prevented from being impaired.

  The power supply main line includes a first power supply main line provided in a first power supply main line provided in a first wiring layer on the substrate and a second wiring layer existing on the first wiring layer with an insulating layer interposed therebetween. And a second power supply trunk line electrically connected to the first power supply trunk line through a plurality of contact holes penetrating the insulating layer. Thereby, the substantial cross-sectional area of the power supply trunk line can be increased, and as a result, the voltage drop in the power supply trunk line can be reduced.

  The power supply trunk line includes a first region located on the X direction side of the first display element and a second region located on the X direction side of the second display element, and the plurality of contact holes include A plurality of power supply lines including a first contact hole existing in the first region and a second contact hole existing in the second region, wherein the plurality of power supply lines are connected to the first region; A distance between the portion connected to the first region of the first power supply line and the first contact hole is the second power supply line connected to the second region. The distance between the portion connected to the two regions and the second contact hole may be substantially the same. Thereby, the voltage drop in the first power supply lead line and the voltage drop in the second power supply lead line can be made more uniform, and as a result, the display performance can be further prevented from being impaired.

<Embodiment>
Hereinafter, although the display panel apparatus and electronic device which concern on this invention are demonstrated based on embodiment, this invention is specified based on description of a claim. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the claims are not necessarily required to achieve the object of the present invention, but are described as constituting more preferable embodiments. . Each figure is a schematic diagram and is not necessarily illustrated exactly.

(Display panel device)
FIG. 1 is a plan view showing a display panel device according to an embodiment of the present invention.
As shown in FIG. 1, a display panel device 200 according to an embodiment of the present invention includes a display panel 210, a first COF (chip on film) 220, and a second COF 230.

FIG. 2 is an enlarged plan view showing a region surrounded by a two-dot chain line A in FIG.
In the display area 110 inside the two-dot chain line 100 in the display panel 210, as shown in FIG. 2, the organic EL element 30 as an example of the display element is along the X direction and the Y direction orthogonal to the X direction. Are provided in a matrix. Note that although the X direction and the Y direction are orthogonal to each other in this embodiment, the X direction and the Y direction are not necessarily orthogonal to each other in one embodiment of the present invention, and the intersecting angle is arbitrary. is there.

  Among the organic EL elements 30, those with (R) in the code are red light emitting organic EL elements 30, and those with (G) in the code are green light emitting organic EL elements 30. There is a blue light emitting organic EL element 30 with (B) in the reference numeral. Each organic EL element 30 corresponds to one subpixel, and one pixel (one pixel) is formed by combining three subpixels having different emission colors. By controlling the light emission of each organic EL element 30, information such as images and characters is displayed in the display area 110.

In the display area 110, a plurality of source lines (video signal lines) 40, which are examples of data lines, gate lines (scanning lines) 50, which are examples of selection lines, and power supply lines 80 are provided. ing.
Each source line 40 is provided in the display area 110 along the X direction. One source wiring 40 corresponds to one row of organic EL elements 30 arranged in the X direction. That is, one source line 40 corresponds to one row of subpixels arranged in the X direction.

Each gate line 50 is provided in the display area 110 along the Y direction. One gate line 50 corresponds to one column of pixels arranged in the Y direction.
Each power lead-in line 80 is provided in the display area 110 along the X direction. In the present embodiment, the two power supply lines 80 correspond to one row of pixels arranged in the X direction. Focusing on one pixel, one power supply line 80 is used for one subpixel, and the other power supply line 80 is shared by two subpixels. Specifically, one power supply line 80 corresponds to the organic EL element 30 (R), and the other power supply line 80 corresponds to the organic EL element 30 (G) and the organic EL element 30 (B). doing.

FIG. 3 is a schematic cross-sectional view showing a cross-sectional structure of the display panel according to the embodiment of the present invention.
As shown in FIG. 3, the display panel 210 includes a panel substrate 1, a gate electrode 2, a gate insulating film 3, a source electrode 4, a drain electrode 5, a first partition wall 6, a semiconductor layer 7, an inorganic protective film 8, and an insulation. A layer 9, a lower electrode 10, a second partition wall 11, an organic layer 12, an upper electrode 13, an EL sealing layer 14, a sealing layer 15, a sealing substrate 16, and the like are provided. A thin film transistor 20 is configured by the gate electrode 2, the gate insulating film 3, the source electrode 4, the drain electrode 5, the first partition wall 6 and the semiconductor layer 7. The lower electrode 10, the second partition wall 11, the organic layer 12, and the upper electrode 13 constitute an organic EL element 30.

  The thin film transistors 20 are formed on the panel substrate 1 in a plurality of bottom gate type arrays. In particular, the thin film transistor 20 according to the present embodiment is an organic thin film transistor in which the semiconductor layer 7 serving as a channel layer is formed of an organic material, and each semiconductor layer 7 includes a plurality of the thin film transistors provided in the first partition wall 6. Each of the openings 6a is formed by applying an organic material. The thin film transistor 20 according to the present embodiment is a p-channel driving transistor, and the drain electrode 5 is electrically connected to the lower electrode 10 of the organic EL element 30. In FIG. 3, the switching transistor is not shown. Hereinafter, each component of the thin film transistor 20 will be described in detail.

The panel substrate 1 is a flexible substrate made of a flexible material such as a plastic film. When the panel substrate 1 is a flexible substrate, it is preferable that at least one barrier layer (not shown) whose main component is SiN or the like is formed on the surface of the panel substrate 1.
The gate electrode 2 is patterned in a predetermined region on the panel substrate 1 and has a single layer structure or a multilayer structure. The gate electrode 2 is made of a conductive material. Examples of the conductive material include Mo (molybdenum), Al (aluminum), Cu (copper), W (tungsten), Ti (titanium), Cr (chromium), and the like. And alloys such as MoW (molybdenum tungsten).

  The gate insulating film 3 (gate insulating layer) is formed on the gate electrode 2. In the present embodiment, the gate insulating film 3 is formed over the entire surface of the panel substrate 1 so as to cover all the gate electrodes 2. The gate insulating film 3 is composed of an inorganic insulating film such as a silicon oxide film or a silicon nitride film, and has a single layer structure or a multilayer structure. The gate insulating film 3 may be composed of an organic insulating film such as polyimide, polyvinylphenol, or polypropylene.

  A pair of the source electrode 4 and the drain electrode 5 are formed on the gate insulating film 3, and are disposed to face each other with a predetermined interval above the gate electrode 2. The source electrode 4 and the drain electrode 5 are made of a conductive material, and examples of the conductive material include metals such as molybdenum and tungsten, alloys such as molybdenum tungsten, alloys of these metals, and the like.

In the present embodiment, the drain electrode 5 has a portion opposite to the semiconductor layer 7 extending. The portion where the drain electrode 5 is extended functions as a wiring (wiring layer) for connecting to another conductive portion, and is connected to the lower electrode 10 of the organic EL element 30 in the present embodiment.
The first partition wall 6 is formed on the source electrode 4 and the drain electrode 5. A semiconductor layer 7 is partitioned by the first partition wall 6. The partition of the first partition 6 has a function of preventing the organic material applied in the opening 6a from flowing out of the opening 6a when the semiconductor layer 7 is formed. The opening 6 a of the first partition wall 6 is configured to expose a part of the source electrode 4, a part of the drain electrode 5, and a part of the gate insulating film 3.

The first partition wall portion 6 can be formed using a photosensitive resin such as a resist, and the opening 6a can be formed by partially exposing and developing the photosensitive resin. In addition, it is preferable to give the surface of the 1st partition part 6 water repellency by performing predetermined | prescribed surface treatment with respect to the 1st partition part 6. FIG.
The semiconductor layer 7 is formed in the opening 6 a of the first partition wall 6 so as to be in contact with at least the source electrode 4 and the drain electrode 5. The semiconductor layer 7 functions as a channel layer of the thin film transistor 20 and is formed above the gate electrode 2. In the present embodiment, the semiconductor layer 7 is formed on the gate insulating film 3, the source electrode 4, and the drain electrode 5.

  The semiconductor layer 7 is a coating-type semiconductor layer and can be formed by a printing method such as an inkjet method. Examples of the coating-type semiconductor layer 7 include an organic semiconductor layer using a pentacene, phthalocyanine-based, or porphyrin-based soluble organic material, or an oxide semiconductor using a transparent amorphous oxide such as IGZO (InGaZnOx). There are layers. In the present embodiment, an organic material is used for the semiconductor layer 7.

  Although not shown, an organic protective film may be formed so as to cover the semiconductor layer 7 in order to protect the semiconductor layer 7 in the opening 6 a of the first partition wall 6. As the organic protective film, an organic material such as a high molecular material such as an acrylic polymer or a low molecular material such as an acrylic monomer can be used. By forming the organic protective film, it is possible to prevent moisture, oxygen, and the like from entering the semiconductor layer 7.

The inorganic protective film 8 is formed above the entire upper surface of the panel substrate 1 so as to cover all the thin film transistors 20, and suppresses the generation of leakage current between layers. In the present embodiment, the inorganic protective film 8 has a multilayer structure in which a SiO (silicon oxide) film is laminated on a SiN (silicon nitride) film.
The insulating layer 9 is formed above the inorganic protective film 8. In the present embodiment, the insulating layer 9 is a planarizing insulating layer formed over the entire surface of the panel substrate 1. The insulating layer 9 is a thick planarizing film that suppresses the generation of leakage current between layers and planarizes the surface of the thin film transistor 20. The insulating layer 9 can be formed of, for example, an organic material such as a resist or an inorganic material such as SOG (Spin On Glass).

  The insulating layer 9 is provided with a contact hole 9a for connecting the lower electrode 10 of the organic EL element 30 and the drain electrode 5 (wiring portion of the drain electrode 5). The contact hole 9a is formed by removing a portion on the drain electrode 5 in the insulating layer 9. By forming the contact hole 9a, the surface of the drain electrode 5 can be exposed, and the drain electrode 5 and the lower electrode 10 can be connected via the contact hole 9a.

The organic EL element 30 in the present embodiment is a top emission type organic EL element, and is formed on the insulating layer 9 in pixel units (light emission units). Hereinafter, each component of the organic EL element 30 will be described in detail.
The lower electrode 10 is formed on the insulating layer 9 and functions as a pixel electrode of the organic EL element 30 as an anode (anode) through which current flows. Moreover, since the organic EL element 30 in this Embodiment is a top emission type, the lower electrode 10 is comprised as a reflective electrode. The lower electrode 10 as a reflective electrode is, for example, a single-layer structure of a reflective metal (a metal with high reflectivity) such as APC (aluminum or silver alloy), or a transparent metal oxide such as ITO (indium tin oxide). , And a two-layer structure with a reflective metal such as a silver alloy. The lower electrode 10 is patterned in a predetermined region on the insulating layer 9. In the case of a bottom emission type organic EL element, the lower electrode 10 is a transparent electrode made of only a transparent metal oxide such as indium tin oxide.

  Further, as described above, the lower electrode 10 is electrically connected to the drain electrode 5 of the thin film transistor 20 through the contact hole 9 a that penetrates the insulating layer 9. In the present embodiment, the lower electrode 10 is formed in contact with the drain electrode 5 exposed at the bottom of the contact hole 9a. As a result, a current corresponding to the data voltage supplied from the source wiring 40 is supplied to the lower electrode 10 from the drain electrode 5 of the thin film transistor 20 as the driving transistor.

  The second partition wall 11 is an EL bank layer formed on the organic EL layer, and is formed on the insulating layer 9. The second partition wall 11 is provided with a plurality of openings 11 a for partitioning the organic layer 12. The second partition wall 11 can be formed using a photosensitive resin such as a resist, and the opening 11a can be formed by partially exposing and developing the photosensitive resin.

  The organic layer 12 is an organic EL layer that is formed in units of pixels on the lower electrode 10 and includes a light emitting layer made of a predetermined organic light emitting material. The light emitting layer emits light when the light emitting material of the light emitting layer is excited by energy generated by recombination of injected electrons and holes when a predetermined voltage is applied to the lower electrode 10 and the upper electrode 13. The light emitting layer has, for example, a multilayer structure using α-NPD (Bis [N- (1-naphthyl) -N-phenyl] benzidine) as a lower layer and Alq3 (tris- (8-hydroxyquinoline) aluminum) as an upper layer. can do.

  The organic layer 12 is formed by laminating all or a part of the hole injection layer, the hole transport layer, the electron transport layer, and the electron injection layer in addition to the light emitting layer. In this case, for example, a compound such as PEDOT (polyethylenedioxythiophene) can be used as the hole injection layer, and triferamine, polyaniline, or the like can be used as the hole transport layer. For example, PPV (polyphenylene vinylene) can be used.

  The upper electrode 13 is a cathode from which current flows, and has a function of injecting electrons into the light emitting layer by applying a negative voltage to the light emitting layer with respect to the lower electrode 10. The upper electrode 13 is a transparent electrode formed to face the lower electrode 10 and is formed on the organic layer 12. Note that the upper electrode 13 in the present embodiment is a common electrode shared by all the organic EL elements 30. The upper electrode 13 is preferably made of a material and structure having a high transmittance, and can be made of a transparent metal oxide such as ITO or IZO (indium zinc oxide). In the present embodiment, the potential of the upper electrode 13 is the ground potential.

  The EL sealing layer 14 is formed above the entire upper surface of the panel substrate 1 so as to cover all the organic EL elements 30, and seals and protects the organic EL elements 30. In the present embodiment, the EL sealing layer 14 is made of a SiN film. The EL sealing layer 14 covers the inorganic protective film 8, the insulating layer 9, and the side surface of the organic EL element 30 formed thereon above the outer peripheral edge of the panel substrate 1, and a gate insulating film 3 also covers the outer peripheral edge portion 3a on the upper surface of 3. In such a configuration, in the manufacturing process of the display panel 210, after forming a laminated body in which the layers from the source electrode 4 to the sealing substrate 16 are laminated on the panel substrate 1, an unnecessary outer peripheral portion of the laminated body is sized. This is realized by applying a dicer blade 18 to the region 17 where the EL sealing layer 14 is directly formed on the gate insulating film 3 and removing it. With this configuration, the layers from the source electrode 4 to the upper electrode 13 formed on the gate insulating film 3 are not cut, and the inorganic protective film 8, the insulating film 9, and the organic EL element formed thereon 30 can maintain a state where the side surface of the electrode 30 is covered with the EL sealing layer 14, thereby preventing moisture, gas, and the like from entering the thin film transistor 20 and the organic EL element 30 from the side of the laminated structure. it can.

  The sealing layer 15 functions as an adhesive layer that joins the panel substrate 1 on which the organic EL elements 30 are formed and the sealing substrate 16, and also functions as a protective layer that seals and protects the organic EL elements 30. To do. As a material of the sealing layer 15, for example, an acrylic or epoxy resin can be used. A thin film sealing layer may be formed between the EL sealing layer 14 and the sealing layer 15 in order to further protect the organic EL element 30 from moisture and oxygen. As a material of the thin film sealing layer, for example, a transparent insulating material such as SiN or SiON (silicon oxynitride) can be used.

  The sealing substrate 16 is a substrate that seals the organic EL element 30 and protects the organic EL element 30 from the outside. That is, the sealing substrate 16 forms the outer surface of the display panel device 200. As with the panel substrate 1, the sealing substrate 16 may use a resin material having flexibility. Since the sealing substrate 16 transmits light emitted from the light emitting layer of the organic EL element 30, the organic EL element 30 corresponding to each of the plurality of pixels emits light as desired. An image is displayed. As the sealing substrate 16, for example, a transparent glass substrate can be used. In addition, you may form the color filter corresponding to each color of red, green, and blue in the inner surface of the sealing substrate 16 as needed, In this case, the sealing substrate 16 permeate | transmits the light which passed the color filter. .

FIG. 4 is a circuit diagram showing an equivalent circuit of the sub-pixel according to the embodiment of the present invention.
As shown in FIG. 4, an equivalent circuit of the display panel includes an organic EL element 101 (corresponding to the organic EL element 30 described above) and a thin film transistor 102 (corresponding to the thin film transistor 20 described above) that is a driving transistor for driving the organic EL element 101. The thin film transistor 103 is a switching transistor for selecting the organic EL element 101, the capacitor 104, and the like.

A source electrode 102S (corresponding to the aforementioned source electrode 4) of the thin film transistor 102 is connected to a power supply lead line 105 (corresponding to the aforementioned power supply lead line 80), and a drain electrode 102D (corresponding to the aforementioned drain electrode 5) is connected to the organic EL element 101. The anode 101A (corresponding to the lower electrode 10 described above) is connected.
Further, the source electrode 103S of the thin film transistor 103 is connected to the source wiring 106 (corresponding to the source wiring 40 described above), the gate electrode 103G is connected to the gate wiring 107 (corresponding to the gate wiring 50 described above), and the drain electrode 103D. Is connected to the capacitor 104 and the gate electrode 102G of the thin film transistor 102.

  In this structure, when a gate signal is input to the gate wiring 107 and the thin film transistor 103 is turned on, the video signal voltage supplied through the source wiring 106 is held in the capacitor 104. Then, the holding voltage written in the capacitor 104 is held throughout one frame period. By this holding voltage, the conductance of the thin film transistor 102 changes in an analog manner, and a driving current corresponding to the light emission gradation flows from the anode 101A to the cathode 101C of the organic EL element 101. Thereby, each organic EL element 101 emits light, and an image or the like is displayed in the display area 110.

Returning to FIG. 1, the description of the configuration of the display panel device 200 is continued again.
The first COF 220 has a configuration in which a source driver 222 as a first driving unit is mounted on a first FPC (flexible printed circuit) 221. The second COF 230 has a configuration in which a gate driver 232 as a second driving unit is mounted on a second FPC (flexible printed circuit) 231. The first COF 220 is disposed on one end side in the X direction of the display panel 210, and the second COF 230 is disposed on the other end side in the X direction of the display panel 210.

In plan view, the shape of the panel substrate 1 is irregular, and the shape of the display region 110 is also irregular. The display panel device 200 according to the present embodiment is different in configuration from a general display panel device in that the shape of the display region 110 is irregular.
In addition, in this application, an irregular shape means that it is not a rectangle (a square is included). When the display area is rectangular, the width of the display area in the X direction is uniform along the Y direction, and the width of the display area in the Y direction is also uniform along the X direction. However, if the display area is irregular, the width of the display area in the X direction is not uniform along the Y direction, or the width of the display area in the Y direction is not uniform along the X direction, or both The width of is not uniform. In such a case, since the display area cannot be said to be rectangular, it is regarded as an irregular shape.

  The irregular shape includes, for example, a circular shape, a semi-circular shape, an elliptical shape, a triangular shape, or a polygonal shape having five or more pentagons. Moreover, the shape in which the recessed part or the convex part was formed in at least one part with respect to the rectangle is also contained in an irregular shape. It can be said that the display area 110 in this embodiment has a shape in which a concave portion is formed at one corner with respect to a rectangle. Needless to say, the irregular shape is not limited to the shape of the display region 110 according to the present embodiment as shown in FIG.

  The shape of the display area 110 in this embodiment will be specifically described. The outer peripheral edge of the display area 110 includes an X direction one end edge 111, a Y direction one end edge 112, an X direction other end edge 113, and a Y direction other end edge 114. The one end edge 111 in the X direction is linear. The one end edge 112 in the Y direction is continuous with one end in the Y direction of the one end edge 111 in the X direction, and maintains a right angle with the one end edge 111 in the X direction. The other end edge 113 in the X direction is continuous with the other end in the X direction of the one end edge 112 in the Y direction, and is parallel to the other end edge 113 in the X direction because it maintains a right angle with the one end edge 112 in the Y direction. , The length is different from the one end edge 111 in the X direction. The other end edge 114 in the Y direction connecting the one end edge 111 in the X direction and the other end edge 113 in the X direction is not linear throughout the other edges 111 to 113, but is curved in part. This portion includes a straight first straight portion 114a and a second straight portion 114c, and a curved portion 114b connecting them.

  In addition to the display area 110, the display panel 210 has an outer peripheral area (frame area) 120 surrounding the display area 110 on the panel substrate 1. As shown in FIG. 1, a region outside the two-dot chain line 100 is an outer peripheral region 120 on the panel substrate 1. The outer peripheral region 120 includes a region 121 adjacent to the one end edge 111 in the X direction, a region 122 adjacent to the one end edge 112 in the Y direction, a region 123 adjacent to the other end edge 113 in the X direction, and the other end edge 114 in the Y direction. An adjacent region 124 is included.

FIG. 5 is a schematic plan view showing wiring paths of data wiring and selection wiring.
As shown in FIG. 5, the display region 110 is provided with a plurality of source lines 40, gate lines 50, and power supply lines 80. In the outer peripheral region 120, a plurality of first lead lines 60 connected to the source lines 40 and a plurality of second lead lines 70 connected to the gate lines 50 are provided. The outer peripheral region 120 is further provided with a power trunk 90 connected to the power lead-in line 80.

FIG. 6 is a schematic perspective view showing wiring paths of data wiring, selection wiring, and power supply wiring for each layer.
As shown in FIG. 6, the level where each gate line 50 is located is the first wiring layer 211, and the level where each source line 40 and each power supply line 80 is located is the second wiring layer 212. The first wiring layer 211 is a layer in which the gate electrode 2 is formed, and the second wiring layer 212 is a layer in which the source electrode 4 and the drain electrode 5 are formed. The gate insulating film 3 exists between the two wiring layers 212 (see FIG. 3).

  Returning to FIG. 5, each first lead-out wiring 60 is connected to one corresponding source line 40 at one end edge 111 in the X direction of the display area 110, and one end edge in the X direction in the outer peripheral area 120. A region 121 adjacent to 111 is drawn along the X direction. The hierarchy in which each first lead wiring 60 is located is the second wiring layer 212 (see FIG. 6). Each first lead-out wiring 60 is connected to the plurality of connection wirings 223 of the first COF 220 in a one-to-one relationship in the connection region 224 in the region 121 adjacent to the X direction one end edge 111. As a result, the source driver 222 of the first COF 220 and each first lead wiring 60 are connected by the first contact 61 in the connection region 224, and the connection wiring 223 is connected to the first lead wiring 60. A voltage is applied from the source driver 222 through the via.

  The connection region 224 in which the plurality of first contacts 61 are located has a long shape along the Y direction, and the plurality of first contacts 61 are arranged along the Y direction. A flexible display panel device that is long in the X direction, such as the display panel device 200 according to the present embodiment, is mainly used by being bent in the X direction. When bending in the X direction, if the first contacts 61 are arranged along the Y direction, that is, if the connection region 224 is long along the Y direction, it is difficult to apply stress to the connection region 224. The disconnection between the first lead-out wiring 60 and the connection wiring 223 hardly occurs.

  Two first contacts 61 located at both ends in the Y direction among the plurality of first contacts 61 (first contact 61 (a) located at one end in the Y direction in FIG. 5 and located at the other end in the Y direction) The first contact 61 (b) is located on the inner side in the Y direction with respect to both ends of the X direction one end edge 111 of the display region 110. With such a configuration, the width of the first COF 220 in the Y direction can be easily made narrower than the width of the display panel 210 in the Y direction, and a narrow frame in the Y direction of the display panel device 200 can be easily realized.

  Each second lead line 70 is connected to one corresponding gate line 50 at one edge 112 in the Y direction of the display region 110 through a contact hole 75 provided in the gate insulating film 3 (FIG. 6). Each second lead wiring 70 is led out along the Y direction to a region 122 adjacent to the one end edge 112 in the Y direction in the outer peripheral region 120. Furthermore, each second lead-out wiring 70 extends from a region 122 adjacent to the one end edge 112 in the Y direction to a region 123 adjacent to the other end edge 113 in the X direction.

  With such a configuration, the second COF 230 can be disposed on the other end side in the X direction of the display panel 210. That is, the second COF 230 can be disposed on the opposite side of the first COF with the display panel 210 interposed therebetween. Therefore, the display panel device 200 can be narrowed in the Y direction. In particular, the frame 124 adjacent to the other edge 114 in the Y direction can be narrowed. In the display panel device 200 according to the present embodiment, unlike a general display panel device, a region 124 adjacent to the other end edge 114 in the Y direction in the outer peripheral region 120 has a special shape. Since such a specially shaped part is a conspicuous part in terms of design, if such a part can be narrowed, the design of the display panel device 200 can be further improved.

  Further, as shown in FIG. 6, the second lead-out wiring 70 includes a wiring 70 </ b> A located in the first wiring layer 211 and a wiring 70 </ b> B located in the second wiring layer 212. The wiring 70 </ b> A extends along the wiring 70 </ b> B and is electrically connected to the wiring 70 </ b> B through a contact hole 73 provided in the gate insulating film 3. Since the second lead-out wiring 70 has a relatively long distance, the electric resistance of the second lead-out wiring 70 is likely to increase. On the other hand, in the present embodiment, the second lead-out wiring 70 is composed of two wirings 70A and 70B extending in parallel with each other. Thereby, the substantial cross-sectional area of the second lead-out wiring 70 can be increased, and as a result, an increase in the electrical resistance of the second lead-out wiring 70 can be suppressed.

  Returning to FIG. 5, the display panel 210 according to the present embodiment includes the first lead wiring 60 connected to the source wiring 40 to which an analog signal for changing the light emission gradation of the organic EL element 30 is input. In addition, since the second lead wiring 70 connected to the gate wiring 50 to which a signal for controlling on / off of the organic EL element 30 is input is routed, the display performance of the display panel 210 is improved. Can keep. This is because if the distance from the source wiring 40 to the source driver 222 becomes longer and the analog signal value deteriorates, the display performance of the display panel 210 may be directly adversely affected, but the gate wiring is less affected by signal deterioration. This is because the display performance of the display panel 210 is not adversely affected even if the length of the second lead wiring 70 connected to 50 is a little longer.

  Note that the second lead wiring 70 drawn to the region 122 adjacent to the one edge 112 in the Y direction may be extended to the region 121 adjacent to the one edge 111 in the X direction where the first lead wiring 60 is disposed. Technically possible. However, in that case, both the first COF 220 and the second COF 230 must be arranged side by side on one end side in the X direction of the display panel 210, and the Y of the connection region 224 between the first lead-out wiring 60 and the source driver 222 is required. The deviation between the direction center and the Y direction center of the X direction one end edge 111 from which the source line 40 is drawn out becomes large, and as a result, some of the first lead lines 60 become long. Therefore, it is preferable that the second lead-out wiring 70 is extended to the region 123 adjacent to the other end 113 in the X direction where the first lead-out wiring 60 is not arranged. It can suppress becoming long.

  Each second lead wiring 70 is connected in a one-to-one relationship with the plurality of connection wirings 233 of the second COF 230 in the connection region 234 in the region 123 adjacent to the other end edge 113 in the X direction. As a result, the gate driver 232 of the second COF 220 and each second lead wiring 70 are connected to each other at the second contact 71 in the connection region 234, and the connection wiring 233 is connected to the second lead wiring 70. A voltage is applied from the gate driver 232 through the gate driver 232.

  The connection region 234 where the plurality of second contacts 71 are located has an elongated shape along the Y direction, and the plurality of second contacts 71 are arranged along the Y direction. As in the case of the connection region 224 in which the plurality of first contacts 61 are located, the connection region 234 is elongated along the Y direction by arranging the second contacts 71 along the Y direction. Therefore, when the display panel device 200 is bent in the X direction, stress is not easily applied to the connection region 234, and disconnection between the second lead wiring 70 and the connection wiring 233 does not easily occur.

  The second contact 71 (a) located at one end in the Y direction among the plurality of second contacts 71 is located on the outer side in the Y direction with respect to the other end edge 113 in the X direction of the display area 110. With such a configuration, the number of bent portions in the routing of the second lead-out wiring 70 can be reduced, so that the wiring pattern becomes simpler and the disconnection and short circuit of the second lead-out wiring 70 are suppressed. be able to. The second contact 71 (b) located at the other end in the Y direction is located on the inner side in the Y direction with respect to the other end edge 113 in the X direction of the display area 110.

  In the present embodiment, the width of the outer peripheral area 120 is different between the one end side in the Y direction and the other end side of the display area 110. Specifically, as shown in FIG. 1, the width in the X direction is narrower in the region 124 adjacent to the Y direction other end edge 114 than in the region 122 adjacent to the Y direction one end edge 112. Such a configuration is realized by not arranging the first lead wiring 60 and the second lead wiring 70 in the region 124 adjacent to the other edge 114 in the Y direction. With such a configuration, it is easier to narrow the frame or to make it different in shape, so that it is possible to obtain the display panel device 200 with more excellent display performance and design.

Each power lead-in line 80 is provided in the display area 110 along the X direction. As shown in FIG. 6, the hierarchy in which each power supply line 80 is located is the second wiring layer 212.
The power supply trunk line 90 is provided in the outer peripheral region 120. The power supply main line 90 is connected to the connection wiring 223 of the first COF 220 in the connection region 224 in the region 121 adjacent to the X direction one end edge 111. As a result, the source driver 222 of the first COF 220 and the power supply trunk line 90 are connected to each other through the first contact 61 in the connection region 224, and the power supply main line 90 is connected to the power supply from the source driver 222 via the connection wiring 223. A voltage is applied. Further, the power supply main line 90 is connected to the connection wiring 233 of the second COF 230 in the connection region 234 in the region 123 adjacent to the other end edge 113 in the X direction. As a result, the gate driver 232 of the second COF 230 and the power supply trunk line 90 are connected to each other at the second contact 71 in the connection region 234, and the power supply trunk line 90 is connected to the power supply from the gate driver 232 via the connection wiring 233. A voltage is applied.

  As shown in FIG. 6, the power supply trunk line 90 includes a wiring 90 </ b> A located in the first wiring layer 211 and a wiring 90 </ b> B located in the second wiring layer 212. In the first wiring layer 211, the wiring 90A is arranged along the one end edge 111 in the X direction, the one end edge 112 in the Y direction, the other end edge 113 in the X direction, and the other end edge 114 in the Y direction. On the other hand, the wiring 90 </ b> B is arranged along the other end edge 113 in the X direction and the other end edge 114 in the Y direction in the second wiring layer 212. The wiring 90 </ b> A is electrically connected to the wiring 90 </ b> B through contact holes 83 and 85 provided in the gate insulating film 3.

Thus, the power supply trunk line 90 is composed of the wirings 90A and 90B. Thereby, the substantial cross-sectional area of the power supply trunk line 90 can be increased, and a voltage drop in the power supply trunk line 90 can be suppressed.
Further, as shown in FIG. 6, the third wiring layer 213 is provided with a ground trunk line 95 to which a ground potential is applied from the source driver 222. The third wiring layer 213 is a layer in which the lower electrode 10 is formed in FIG. The ground trunk line 95 is arranged along the one end edge 111 in the X direction and the one end edge 112 in the Y direction in the third wiring layer 213. The upper electrode 13 is connected to the ground trunk line 95 in the outer peripheral region 120 (not shown). As a result, a ground potential is applied to the upper electrode 13. Further, as described above, the upper electrode 13 is shared by all the organic EL elements 30. Therefore, it is required to improve the in-plane uniformity of the potential in the upper electrode 13. In the present embodiment, since the ground trunk line 95 has a portion along the one edge 112 in the Y direction, the voltage drop in the X direction of the upper electrode 13 can be suppressed, and as a result, the potential uniformity in the X direction. Can be improved. Similarly, since the ground trunk line 95 has a portion along the one end edge 111 in the X direction, the voltage drop in the Y direction of the upper electrode 13 can be suppressed, and as a result, the potential uniformity in the Y direction is improved. Can be achieved.

When the width of the outer peripheral area 120 is different between the one end side and the other end side in the Y direction of the display area 110, both the power supply trunk line 90 and the power supply trunk line 95 are arranged in the wide area. In a narrow region, it is preferable that one of the power supply trunk line 90 and the power supply trunk line 95 is omitted.
For example, in the case where the thin film transistor 20 connected to the organic EL element 30 is n-type like the display panel device 200 according to the present embodiment, the region 124 adjacent to the narrow Y-direction other end edge 114 is narrow. In FIG. 2, the power supply trunk line 95 is omitted, and only the power supply trunk line 90 is arranged. In the equivalent circuit shown in FIG. 4, the video signal voltage is held in the capacitor 104, but the power supply trunk line 90 is left and the power supply trunk line 95 is omitted, so that the Y of the display panel device 200 is not affected without affecting the capacitance Cs. The width in the direction can be narrowed.

Conversely, when the thin film transistor 20 connected to the organic EL element 30 is p-type, the power supply trunk line 90 is left in the region 124 adjacent to the narrow Y-direction other end edge 114, and the power supply trunk line 95 is omitted. Thus, the width of the display panel device 200 in the Y direction can be reduced without affecting the capacitance Cs.
FIG. 7 is an enlarged view of a region C surrounded by a two-dot chain line in FIG. A region C is a curved portion of the display region 110. In the figure, pixel columns P1 to P12 appear. Each pixel column is composed of a plurality of pixels 32 arranged in the X direction.

As shown in FIG. 7, the position of the pixel 32 at the end of each pixel column P <b> 1 to P <b> 12 is adjusted according to the shape of the display region 110. For example, unlike the position of the pixel 32 _{P5 in} the X direction, the position of the pixel 32 _{P4 in} the X direction is shifted by a length B1 corresponding to one pixel. Unlike the position of the pixel 32 _{P8 in} the X direction, the position of the pixel 32 _{P7 in} the X direction is shifted by a length B2 corresponding to one pixel. Unlike the position of the pixel 32 _{P11 in} the X direction, the position of the pixel 32 _{P10 in} the X direction is shifted by a length B3 corresponding to one pixel. Thereby, the display region 110 can be provided with a microscopically staircase shape and a macroscopically curved portion. Note that the lengths B1, B2, and B3 for one pixel are substantially the same. In addition, the position of the end on the pixel column side of the power supply trunk line 90 is adjusted in accordance with the position of the pixel 32 at the end of each pixel column P1 to P12. The power supply main line 90 has regions 90 _P4 , 90 _P5 , 90 _P7 , 90 _P8 , 90 _P10 , 90 _P11 . The regions 90 _{P4 to} 90 _P11 are regions located on the X direction side of the pixels 32 _{P4 to} 32 _P11 , respectively. The end portions 90 _{a4 to} 90 _a11 of the regions 90 _{P4 to} 90 _P11 are all substantially parallel to the Y direction. Unlike the position of the end 90 _a5 of the region 90 _P5 of the power supply trunk line 90, the position of the end 90 _a4 of the region 90 _P4 of the power supply main line 90 is shifted by the length C1 for one pixel. Unlike the position of the end portion 90 _a8 of the region 90 _P8 of the power supply main line 90, the position of the end portion 90 _a7 of the region 90 _P7 of the power supply main line 90 is shifted by the length C2 for one pixel. Unlike the position of the end 90 _a11 of the area 90 _P11 of the power supply trunk line 90, the position of the end 90 _a10 of the area 90 _P10 of the power supply trunk line 90 is shifted by a length C3 corresponding to one pixel. Thereby, the shape of the end of each power source main line 90 on each pixel side can be microscopically stepped. Note that the lengths C1, C2, and C3 for one pixel are substantially the same. As a result of the above, the distance in the X direction between the pixel 32 at the end of the pixel column and the power supply trunk line 90 is substantially the same in each of the pixel columns P1 to P12. Specifically, the X-direction interval A1 between the pixel 32 _P4 and the power supply trunk line 90 is substantially the same as the X-direction interval A2 between the pixel 32 _P5 and the power supply trunk line 90. A distance A2 between the pixel 32 _P7 and the power supply trunk line 90 in the X direction is substantially the same as a distance A3 between the pixel 32 _P8 and the power supply trunk line 90 in the X direction. The distance A3 in the X direction between the pixel 32 _P10 and the power supply trunk line 90 is substantially the same as the distance A4 in the X direction between the pixel 32 _P11 and the power supply trunk line 90. Thereby, the length of the power supply lead-in line 80 from the power supply trunk line 90 to the display element 30 existing in the pixel 32 at the end of each pixel column is substantially the same in each pixel column P1 to P12. Therefore, the voltage drop of the power supply lead-in line 80 in each pixel column P1 to P12 can be made uniform, and as a result, even when a curved portion is provided in the display region 110, the display performance of the display panel 210 is hardly impaired. be able to. In this specification, “substantially the same” includes not only the case where they are completely coincident but also the case where there is a variation of about 5% due to manufacturing errors.

  In addition, as shown in FIG. 7, the width (the number of pixel columns) of each step of the staircase shape of the display area 110 is different from each other. For example, in the pixel columns P1 to P4, the width of one step in the staircase shape corresponds to four pixel columns, and in the pixel columns P5 to P7, the width of one step in the staircase shape corresponds to three pixel columns. In such a case, simply arranging the linear power supply trunk line along the pixel column cannot make the interval in the X direction between the pixel at the end of each pixel column and the power supply trunk line uniform. On the other hand, in the present embodiment, the power supply wiring having the same staircase shape as the staircase shape of the display region 110 is arranged along the pixel column. Thereby, the space | interval of the X direction of the pixel of the edge part of each pixel row | line | column and a power supply trunk line can be made uniform.

In addition, even when the width of each step of the staircase shape of the display area 110 (the number of pixel columns) is equal to or more than 2 pixels, each pixel can be obtained simply by arranging a linear power supply trunk along the pixel columns. The distance between the pixels at the end of the column and the power supply trunk line in the X direction cannot be made uniform.
In other words, it can be said as follows. As shown in FIG. 7, focusing on the pixel columns P4, P5, and P6, the positions of the end pixels 32 _P4 and 32 _P5 are shifted in the X direction in the pixel columns P4 and P5, but in the pixel columns P5 and P6, The positions of the end pixels 32 _P5 and 32 _P6 are aligned in the X direction. That is, the distance in the X direction (for one pixel) between the pixel 32 _P4 and the pixel 32 _P5 is different from the distance in the X direction (for 0 pixel) between the pixel 32 _P5 and the pixel 32 _P6 . Even in such a case, since the end portions 90 _a4 , 90 _a5 , 90 _{a6 of the} regions 90 _P4 , 90 _P5 , 90 _P6 of the power supply trunk line 90 are all substantially parallel to the Y direction, the pixels 32 _P4 , 32 _P5 , 32 The distance in the X direction between _P6 and the power supply trunk line 90 can be made substantially the same.

As described above, in the present embodiment, the power supply trunk line 90 includes the wiring 90 </ b> A located in the first wiring layer 211 and the wiring 90 </ b> B located in the second wiring layer 212. The wiring 90 </ b> A and the wiring 90 </ b> B are electrically connected through contact holes 83 and 85. Here, as shown in FIG. 7, each contact hole 83 may correspond to each power supply line 80 on a one-to-one basis. Further, the distance between the portion of the power supply lead-in line 80 connected to the power supply main line 90 and the contact hole 83 corresponding to the power supply lead-in line 80 may be substantially the same in each power supply lead-in line 80. Specifically, as shown in FIG. 7, in the region 90 _P4 of the power supply trunk line 90, between the portion F <b> 1 connected to the power supply trunk line 90 of the power supply lead line 80 and the contact hole 83 corresponding to the power supply lead line 80. A distance G1 exists. Further, in the region 90 _P5 of the power supply main line 90, a distance G2 exists between the portion F2 connected to the power supply main line 90 of the power supply lead-in line 80 and the contact hole 83 corresponding to the power supply lead-in line 80. These distances G1 and G2 are substantially the same. In this way, the voltage drop from each contact hole 83 to the corresponding power supply lead line 80 can be made uniform, and the display performance of the display panel 210 can be further prevented from being impaired.

  Further, as shown in FIG. 7, the shape of the end portion of each power source trunk line 90 on each pixel column side is a bent shape bent substantially at a right angle (see region D). On the other hand, the shape of the end 92 on the opposite side to each pixel column of the power supply trunk line 90 is a bent shape bent at an obtuse angle (see region E). Specifically, the shape of the end portion 92 in the region E includes a convex shape having an obtuse angle (about 135 °) and a concave shape having an obtuse angle (about 135 °). The power supply trunk line 90 is covered with an inorganic protective film 8 as shown in FIG. In order to suppress deterioration of the thin film transistor due to intrusion of moisture and gas from the outside air, it is important to improve the sealing property of the inorganic protective film 8. Therefore, in this embodiment, the concave shape and the convex shape of the end portion 92 of the power supply trunk line 90 are both obtuse. Thereby, the fall of the coverage in the concave shape location of the inorganic protective film 8 can be suppressed, and the thin film formation in a convex shape location can be suppressed. As a result, the sealing property of the inorganic protective film 8 can be improved. Moreover, when the organic protective film which has a resin material as a main component is arrange | positioned upwards, these resin materials do not easily enter an acute angle shape part. On the other hand, by making both the concave shape and the convex shape of the end portion 92 of the power supply trunk line 90 an obtuse angle, the sealing property of the organic protective film mainly composed of a resin material can be improved.

  Further, as shown in FIG. 7, the end portions of the power supply wiring 90 on the pixel column side and the end portions 92 of the power supply wiring 90 opposite to the pixel sides are both bent (regions D and E). reference). Then, the bending angle (about 135 °) of the end 92 on the side opposite to each pixel column of the power supply main line 90 is larger than the bending angle (about 90 °) of the end on the pixel column side of the power supply main line 90. large. Thereby, compared with the case where both bending angles are made the same, the coverage of a concave shape part and the thin film formation in a convex shape part can be suppressed. As a result, the sealing property of the inorganic protective film 8 can be improved. This is true regardless of whether the angle of bending of the end 92 on the opposite side of each pixel column of the power supply trunk line 90 is an acute angle or an obtuse angle. For example, even if the bend angles of the region D and the region E are both acute angles, if the bend angle of the region E is larger than the bend angle of the region D, the effect of improving the sealing property of the inorganic protective film 8 is obtained. Play.

(Modification of the shape of the main power line)
8 and 9 are schematic plan views showing modifications of the shape of the power supply trunk line. As shown in FIG. 8, the display panel 1210 has a power supply trunk line 1090. The shape of the end portion 1092 on the opposite side to each pixel column of the power supply main line 1090 is a bent shape bent substantially at a right angle (see region E). Specifically, the shape of the end portion 1092 in the region E is composed of a substantially right-angled convex shape and a substantially right-angled concave shape. Even in this case, the sealing property of the inorganic protective film 8 can be improved as compared with the case where both the convex shape and the concave shape are acute angles.

  Further, as shown in FIG. 9, the display panel 2210 has a power supply trunk line 2090. The shape of the end 2092 opposite to each pixel column of the power supply main line 2090 is a curved shape. In this case, the sealing property of the inorganic protective film 8 can be further enhanced. Further, as shown in FIG. 9, the shape of the end 2092 of the power supply trunk line 2090 may be a shape that follows the shape of the outer periphery 125 of the panel substrate 1. As a result, the distance between the end portion 2092 of the power supply trunk line 2090 and the outer periphery 125 of the panel substrate 1 becomes substantially the same distance at any location. In the display panel 2210, as shown in FIG. 3, the EL sealing layer 14 exists up to the end of the panel substrate 1. Therefore, the sealing property between the end portion 2092 of the power supply trunk line 2090 and the outer periphery 125 of the panel substrate 1 is made uniform at any location. In other words, there are no locally poorly sealed portions. Therefore, the sealing property of the EL sealing layer 14 is improved.

(Modification of wiring width and thickness of power lead-in wire)
In the present embodiment, it is assumed that the wiring widths of the power supply lead lines 80 are the same and the thicknesses are also the same. However, at least one of the wiring width and thickness of each power supply line 80 may be adjusted for each power supply line 80. Thereby, the voltage drop of each power supply lead-in line 80 resulting from the difference in the length of each power supply lead-in line 80 can be equalized.

  FIG. 10 is a schematic plan view showing a modification of the wiring width of the power supply lead-in line. The display area 110 can be divided into two along the Y direction into the area I and the area II. The width in the X direction of the region II is gradually narrowed toward the other end side in the Y direction. The width of the region I in the X direction is wider than the width of the region II in the X direction. Therefore, as shown in FIG. 10, the power supply lead-in line 80 existing in the region I is longer than the power supply lead-in line 80 existing in the region II. The wiring widths W1, W2, W3, and W4 of the power supply line 80 existing in the region I are wider than the wiring widths W5, W6, W7, and W8 of the power supply line 80 existing in the region II. Thereby, the voltage drop in each power supply lead-in line 80 can be equalized. Furthermore, the wiring widths W5, W6, W7, and W8 may be varied according to the length of the power supply lead line 80, respectively. Thereby, the voltage drop in each power supply lead-in line 80 can be made more uniform. Note that the voltage drop of each power supply lead line 80 depends on the cross-sectional area of each power supply lead line 80. Therefore, in principle, the cross-sectional area of each power supply line 80 may be adjusted for each power supply line 80. In FIG. 10, the wiring width is adjusted. However, the present invention is not limited to this, and the thickness of the wiring may be adjusted, or both the wiring width and the thickness may be adjusted.

In this embodiment, the two power supply lines 80 correspond to one row of pixels, but the present invention is not limited to this. For example, three power supply lines 80 may correspond to one row of pixels, or one power supply line 80 may correspond to one row of pixels.
(Modification of display area shape)
11 and 12 are schematic plan views showing modifications of the shape of the display area. As shown in FIG. 11, the display panel device 4200 includes a display panel 4210 having a deformed display area 4110. One edge 4114 in the Y direction of the display area 4110 is linear in the area IV. As shown in the figure, the positions of the pixels 32 _{P41 to} 32 _P45 at the ends of the pixel columns _{P41 to P45} are adjusted in accordance with the shape of the display area 4110. Specifically, the positions of the pixels 32 _{P41 to} 32 _P45 are shifted by one pixel in the X direction. Thereby, the one end edge 4114 in the Y direction of the display region 4110 is macroscopically linear. And the position of the edge part by the side of each pixel row | line of the power supply main line 4090 is adjusted according to the position of pixel 32P41-32P45 of the edge part of each pixel row | line | column _{P41- P45} . As a result, the intervals in the X direction between the pixels 32 _{P41 to} 32 _P45 at the ends of the pixel columns _{P41 to P45} and the power supply trunk line 90 are substantially the same in the pixel columns _{P41 to P45} .

Further, as shown in FIG. 12, the display panel device 5200 includes a display panel 5210 having a deformed (circular) display area 5110. As shown in the figure, the positions of the pixels 32 _{P51 to} 32 _P53 at the ends of the pixel rows _{P51 to P53} are adjusted in accordance with the shape of the display area 5110. As a result, the display area 5110 is macroscopically circular. And the position of the edge part by the side of each pixel row | line of the power supply main line 5090 is adjusted according to the position of pixel 32P51-32P53 of the edge part of each pixel row | line | column _{P51- P53} . As a result, the intervals in the X direction between the pixels 32 _{P51 to} 32 _P53 at the ends of the pixel columns _{P51 to P53} and the power supply trunk line 90 are substantially the same in the pixel columns _{P51 to P53} .

In the present embodiment and the modification, there is no dummy display element between the display area and the power supply main line. However, the present invention is not limited to this, and a dummy display element that is not used for displaying an image may exist between the display area and the power supply trunk line. For example, depending on the manufacturing method, when the display elements are formed in a matrix, the display elements at both ends in the X direction and both ends in the Y direction may not have the target characteristics. In such a case, these display elements may be dummy display elements that are not used for image display. In order not to be used for image display, the dummy display element and the power supply lead line are electrically disconnected, or the dummy display element and the source wiring and gate wiring are electrically disconnected. Alternatively, the dummy display element and the thin film transistor may be electrically disconnected. In this specification, the pixel means a pixel including a display element used for displaying an image. Therefore, the “pixel at the end of each pixel column” is a pixel having a display element used for displaying an image. Even if the dummy display element is present at the end, the pixel is not “the pixel at the end of each pixel column”.
(Electronics)
FIG. 13 is a perspective view showing an electronic apparatus according to an embodiment of the present invention. FIG. 14 is a partially broken perspective view showing the electronic apparatus according to the embodiment of the present invention, in which a portion of the case covering the display panel is removed. FIG. 15 is a cross-sectional view showing an electronic apparatus according to an embodiment of the present invention.

As shown in FIGS. 13 and 14, the electronic device 300 is housed inside the front portion 311 of the case 310 in a state where the display panel device 200 is curved in the X direction. Further, as shown in FIG. 15, in addition to the display panel device 200, a control unit 240, a battery 250, and the like are accommodated.
The electronic device 300 can be deformed into a ring shape using the fact that the display panel device 200 can be bent, and can be attached to a part of the body such as a wrist. Information is displayed on the front unit 311 and a touch panel is built in the electronic device 300 so that the user can operate display contents. In addition, electronic device 300 may include a communication unit for communicating with an external terminal.

  Note that, in the electronic device 300 that is used by curving the display panel device 200, it is preferable that the display panel device 200 bend more easily in the X direction than in the Y direction. As shown in FIG. 13, when the central axis of curvature of the electronic device 300 is α, it is preferable that the central axis α and the Y direction are substantially parallel. That is, it is preferable that the radius of curvature with respect to an axis orthogonal to the Y direction is smaller than the radius of curvature with respect to an axis parallel to the Y direction. Thereby, damage to the connection region 224 between the first lead-out wiring 60 and the source driver 222 and the connection region 234 between the second lead-out wiring 70 and the gate driver 232 can be suppressed.

  This is because each connection region 224, 234 has a long shape along the Y direction. If the display panel device 200 is bent in the X direction perpendicular to the Y direction, which is the longitudinal direction of each connection region 224, 234, a large stress is applied to each connection region 224, 234 even if the display panel device 200 is bent. Therefore, the wiring structure of the first contact 61 and the second contact 71 in the connection regions 224 and 234 is unlikely to deteriorate.

In addition, it is preferable that the central axis α of the curvature of the electronic device 300 and the major axis direction of the sub-pixels of the display panel 210 are parallel. Thereby, even when the electronic device 300 is curved, the deterioration of the organic EL element 30 can be suppressed.
In the case where the minor axis direction of the subpixel and the central axis α are parallel, it is preferable to provide a groove portion extending in parallel with the central axis α in the second partition wall portion 11 of the display panel 210. Further, when a groove extending perpendicularly to the central axis α is also provided, the depth of the groove extending parallel to the central axis α can be made deeper than the depth of the groove extending perpendicular to the central axis α. preferable. With this configuration, it is possible to secure the ease of bending of the display panel device 200 and to suppress the deterioration of the organic EL element 30.

As described above, the display panel device 200 and the electronic device 300 including the display panel device 200 have been described with reference to FIGS.
In the display panel device 200 according to the present embodiment, both the upper electrode 13 and the lower electrode 10 may be separated for each pixel, and one of the upper electrode 13 and the lower electrode 10 may be displayed. One electrode may be used in common for a plurality of pixels in the region 110.

  In the present embodiment and the modified example, the first configuration in which the second lead-out wiring 70 is extended to the region 123 adjacent to the other end edge 113 in the X direction with respect to the display panel device 200 having the odd-shaped display region 110. In addition, the second configuration in which the electric resistance values of the wirings 40, 50, 60, and 70 are made different according to the lengths of the source wiring 40 and the gate wiring 50 is applied. However, only one of the first configuration and the second configuration may be applied to a display panel device having an irregular display area.

  For example, only the second configuration may be applied to a display panel device having an irregular display area. That is, the second lead-out wiring does not extend to the region adjacent to the other edge in the X direction, and is drawn to the region adjacent to the one end edge in the Y direction, and then disposed on the one end side in the Y direction of the display panel. A display panel device connected to a driver, the second configuration in which the electrical resistance value of each wiring is made different according to the lengths of the source wiring and the gate wiring is applied to the display panel device having an irregular display area May be.

  Further, the above-described characteristics regarding the arrangement of the power supply wiring, the characteristics regarding the relationship between the center axis α of the display panel and the major axis direction of the subpixel, the center axis α of the display panel and the longitudinal direction of the connection region It goes without saying that the characteristic regarding the above relationship may be applied to a conventional display panel device having a rectangular display area or a conventional display panel device in which a gate driver is arranged on one end side in the Y direction of the display panel. .

Further, as a COF of the display panel device, a bendable COF using an organic TFT may be used instead of a COF in which a hard part such as an IC chip is mounted on an FPC. When this bendable COF is used, a second COF may be arranged on one end side in the Y direction of the display panel.
(Method for manufacturing display panel device)
FIG. 16 is a schematic end view showing a part of the manufacturing process of the display panel device according to the embodiment of the present invention. Next, a method for manufacturing the display panel 210 will be described with reference to FIG.

First, as shown in FIG. 16A, the panel substrate 1 is prepared. In the present embodiment, a resin substrate such as polyimide is used as the panel substrate 1. An undercoat layer may be formed on the panel substrate 1 as necessary. Note that a glass substrate may be separately provided on the lower surface of the panel substrate 1 as a support substrate.
Next, as shown in FIG. 16B, a gate electrode 2 having a predetermined shape is formed on the panel substrate 1. Specifically, the gate electrode 2 is deposited on the panel substrate 1 to form a gate metal film, and then the gate metal film is patterned by photolithography and etching to form the gate electrode 2 having a predetermined shape. . The gate metal film can be formed by sputtering or vapor deposition, and wet etching or dry etching can be used for etching the gate metal film.

  Next, as shown in FIG. 16C, the gate insulating film 3 is formed on the gate electrode 2. The gate insulating film 3 is formed on the entire surface of the panel substrate 1 and can be formed by a plasma CVD (Chemical Vapor Deposition) method or a coating method depending on the material. For example, when an inorganic insulating film such as a silicon oxide film or a silicon nitride film is used as the gate insulating film 3, the gate insulating film 3 can be formed by a plasma CVD method. Further, when an organic insulating film such as polyimide, polyvinylphenol or polypropylene is used as the gate insulating film 3, the gate insulating film 3 can be formed by a coating method.

Next, as illustrated in FIG. 16D, the source electrode 4 and the drain electrode 5 are formed on the gate insulating film 3.
Next, as shown in FIG. 16E, a first partition wall portion 6 having an opening 6a provided above the gate insulating film 3 is formed. Specifically, the partition wall layer is formed by coating the material of the first partition wall portion 6 on the entire upper surface of the panel substrate 1, and the first partition wall portion 6 is formed by patterning the partition wall layer. At this time, the opening 6 a of the first partition wall 6 is formed so that the upper surfaces of the end portions of both the source electrode 4 and the drain electrode 5 facing each other are exposed. The partition wall layer can be patterned by exposing and developing the partition wall layer.

Next, as illustrated in FIG. 16F, the semiconductor layer 7 is formed in the opening 6 a of the first partition wall 6.
Next, as shown in FIG. 16G, the inorganic protective film 8 is formed over the entire area above the panel substrate 1 including above the semiconductor layer 7.
Next, as shown in FIG. 16 (h), an insulating layer 9 is formed on the inorganic protective film 8. The insulating layer 9 is formed with a desired thickness so that the surface thereof is planarized. Thereafter, a contact hole 9a is formed to expose a part of the drain electrode 5. The insulating layer 9 can be formed by applying and baking a predetermined material such as SOG.

Next, as shown in FIG. 16I, the lower electrode 10 is formed at a predetermined position including on the drain electrode 5. The lower electrode 10 can be formed, for example, by forming a metal film by sputtering and patterning the metal film by photolithography and wet etching.
Next, as shown in FIG. 16J, a second partition wall portion 11 having a plurality of openings 11a corresponding to matrix pixels is formed by patterning a photosensitive resin.

  Next, as shown in FIG. 16K, the organic layer 12 is formed in the opening 11 a of the second partition wall portion 11. The organic layer 12 is formed, for example, by spin-coating a PEDOT solution to form a hole injection layer, and laminating α-NPD and Alq3 on the hole injection layer by a vacuum deposition method to form a light emitting layer. A compound such as a nitro-substituted fluorenone derivative can be formed thereon by spin coating or the like to form an electron transport layer.

Next, as shown in FIG. 16L, an upper electrode 13 made of ITO is formed on the organic layer 12 by sputtering.
Next, as illustrated in FIG. 16M, the EL sealing layer 14 is formed over the entire area on the upper electrode 13.
Next, as shown in FIG. 16 (n), the sealing layer 15 is applied on the EL sealing layer 14, and the sealing substrate 16 is disposed thereon. Note that a color filter (light control layer) may be formed on the sealing substrate 16 in advance. Thereafter, the sealing layer 15 is cured by applying heat or energy rays while pressing the sealing substrate 16 downward from the upper surface side. Note that a thin film sealing layer made of SiN may be formed on the upper electrode 13 by plasma CVD before applying the sealing layer 15.

Next, unnecessary portions are cut from the laminate formed as described above, and the first COF 220 and the second COF 230 are connected to complete the display panel 210.
Specifically, the X direction one end part and X direction other end part of a laminated body are cut, leaving the area | region 121 adjacent to the X direction one end edge 111, and the area | region 123 adjacent to the X direction other end edge 113. Thereafter, the first COF 220 and the second COF 230 are connected to the region 121 adjacent to the X direction one end edge 111 and the region 123 adjacent to the X direction other end edge 113. Next, the Y direction one end part and Y direction other end part of a laminated body are cut, leaving the area | region 122 adjacent to the Y direction one end edge 112, and the area | region 124 adjacent to the Y direction other end edge 114. FIG.

  Since the cut line is linear, the cutting of both ends in the X direction and one end in the Y direction of the laminate can be performed by a cutting method such as a laser cutting method or a mechanical cutting method. The other end of the laminate in the Y direction is cut by a laser cutting method or the like because the cut line has a curved portion. In addition, you may perform the cut of the X direction both ends of a laminated body, and the Y direction both ends by the same process. The display panel device manufactured in this way can be used as a flat panel display, and can be applied to an electronic apparatus having any display panel device such as a television set, a personal computer, and a mobile phone.

(Summary)
As described above, the display panel device and the electronic apparatus according to the present invention have been described based on the embodiments. However, the present invention is not limited to the above-described embodiments.
In addition, the use of the display panel device having an irregular display area as shown in this embodiment is not limited to a specific one such as a wristwatch type display device, and can be applied to a wide variety of applications.

In addition, it is realized by arbitrarily combining the components and functions in each embodiment without departing from the scope of the present invention, or a form obtained by subjecting each embodiment to various modifications conceived by those skilled in the art. Forms are also included in the present invention.
Moreover, in this Embodiment, although the display panel apparatus using an organic EL element is illustrated, it is not restricted to this. For example, a display panel device using liquid crystal can also be applied to the present invention.

  The display panel device according to one embodiment of the present invention can be widely used for display devices such as a television set, a personal computer, a mobile phone, and a wearable terminal, or various other electric devices.

DESCRIPTION OF SYMBOLS 1 Panel substrate 2 Gate electrode 3 Gate insulating film 4 Source electrode 5 Drain electrode 6 Partition part 6a Opening 7 Semiconductor layer 8 Inorganic protective film 9 Insulating layer 9a Contact hole 10 Lower electrode 11 Partition part 11a Opening 12 Organic layer 13 Upper electrode 14 EL Sealing layer 15 Sealing layer 16 Sealing substrate 20 Thin film transistor 30 Organic EL element 40 Source wiring 50 Gate wiring 60 First lead wiring 70 Second lead wiring 80 Power supply lead line 90 Power supply trunk line 95 Ground trunk line 101 Organic EL element 102 Thin film transistor DESCRIPTION OF SYMBOLS 103 Thin-film transistor 104 Capacitor 105 Power supply line 106 Source wiring 107 Gate wiring 110 Display area 200 Display panel apparatus 210 Display panel 220 1st COF
221,231 FPC
222 Source driver 223 Connection wiring 224 Connection region 230 Second COF
232 Gate driver 233 Connection wiring 234 Connection area 240 Control unit 250 Battery 300 Electronic device 310 Case 311 Display unit 1090 Power supply trunk line 1210 Display panel 2090 Power supply trunk line 2210 Display panel 4090 Power supply trunk line 4110 Display area 4200 Display panel device 4210 Display panel 5090 Power supply trunk line 5110 Display area 5200 Display panel device 5210 Display panel

Claims (11)

A plurality of display elements provided in a matrix along the X and Y directions on the substrate;
The plurality of display elements are electrically connected to the plurality of display elements via a plurality of power supply lines provided in an area adjacent to the display area provided with the plurality of display elements on the substrate and extending in the X direction in the display area. And a connected power main line,
The plurality of display elements are composed of a first display element located at an end of a first display element array composed of a plurality of display elements arranged in the X direction, and a plurality of display elements arranged in the X direction. And a second display element positioned at an end of the second display element row adjacent to the first display element row in the Y direction,
The position of the first display element in the X direction is different from the position of the second display element in the X direction,
An X-direction interval between the first display element and the power supply trunk line is substantially the same as an X-direction interval between the second display element and the power supply trunk line;
Display panel device. The plurality of display elements further includes a plurality of display elements arranged in the X direction, and a third display element array adjacent to the opposite side of the first display element array across the second display element array. Including a third display element located at the end;
The position of the third display element in the X direction is different from the position of the first display element in the X direction,
A distance in the X direction between the third display element and the first display element is different from a distance in the X direction between the third display element and the second display element;
The X-direction interval between the third display element and the power supply trunk line is substantially the same as the X-direction interval between the first display element and the power supply trunk line.
The display panel device according to claim 1. The power supply main line includes a first region located on the X direction side of the first display element and a second region located on the X direction side of the second display element,
The X direction between the first display element and the second display element is such that the position of the end of the first area on the display area side is the position of the end of the second area on the display area side. Is shifted in the X direction by a distance substantially the same as
The display panel device according to claim 1. The power supply main line includes a first region located on the X direction side of the first display element and a second region located on the X direction side of the second display element,
In the region including the first region and the second region, the shape of the end of the power supply trunk line opposite to the display region is a curved shape or a bent shape bent at an obtuse angle.
The display panel device according to claim 1. The power supply main line includes a first region located on the X direction side of the first display element and a second region located on the X direction side of the second display element,
The shape of the end of the power supply trunk line on the display area side and the shape of the end of the power supply trunk line on the opposite side to the display area are both in the area including the first area and the second area. Bend shape,
The display panel device according to claim 1, wherein an angle of bending of the bent portion of the power supply main line on the side opposite to the display region is larger than an angle of bending of the bent shape of the power supply main line on the display region side. . The power supply main line includes a first region located on the X direction side of the first display element and a second region located on the X direction side of the second display element,
The substrate has a curved outer peripheral shape in a region located on the X direction side of the first region and a region located on the X direction side of the second region,
In the region including the first region and the second region, the shape of the end portion on the opposite side to the display region of the power supply trunk line is a curved shape along the outer peripheral shape of the substrate.
The display panel device according to claim 1. Furthermore, a dummy display element that is not electrically connected to the power supply trunk line is provided between the power supply trunk line and the display region.
The display panel device according to claim 1. The plurality of power supply lines include a first power supply line and a second power supply line having a length in the X direction shorter than the first power supply line,
A cross-sectional area of the first power supply lead line is larger than a cross-sectional area of the second power supply lead line,
The display panel device according to claim 1. The power trunk line is
A first power trunk provided in a first wiring layer on the substrate;
A second wiring layer existing on the first wiring layer with an insulating layer interposed therebetween is provided along the first power supply trunk line, and is electrically connected to the first power supply trunk line through a plurality of contact holes penetrating the insulation layer. A second power supply main line connected to
The display panel device according to claim 1. The power supply main line includes a first region located on the X direction side of the first display element and a second region located on the X direction side of the second display element,
The plurality of contact holes include a first contact hole existing in the first region and a second contact hole existing in the second region,
The plurality of power supply service lines include a first power supply service line connected to the first area and a second power supply service line connected to the second area,
The distance between the portion connected to the first region of the first power supply lead line and the first contact hole is such that the portion connected to the second region of the second power supply lead wire and the second contact hole Is approximately the same as the distance between
The display panel device according to claim 9.   An electronic apparatus comprising the display panel device according to claim 1.

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