DISPLAY DEVICE AND PRODUCTION METHOD THEREOF

Between an end edge on a terminal side of a resin substrate layer in a frame region and a display region, an inorganic layered film is provided with a first opening penetrating the inorganic layered film and causing at least a part of an upper face of the resin substrate layer to be exposed, a first filling layer is provided in an interior of the first opening to cover an edge portion thereof, a plurality of lead wiring lines are provided to the end edge on the terminal side in contact with upper faces of the inorganic layered film and the first filling layer, extend in parallel to each other in a direction intersecting the end edge on the terminal side in the frame region, and are electrically connected to a plurality of terminals respectively.

TECHNICAL FIELD

The present invention relates to a display device and a manufacturing method of the same.

BACKGROUND ART

In recent years, self-luminous type organic electroluminescence (EL) display devices in which organic EL elements are used have attracted attention as a display device that can replace a liquid crystal display device. As the organic EL display device, a flexible organic EL display device that has flexibility and in which an organic EL element or the like is layered on a resin substrate having flexibility has been proposed. Here, in the organic EL display device, there are provided a rectangular display region for displaying an image and a frame region formed around the display region, and reduction of the frame region is demanded. Additionally, in the flexible organic EL display device, for example, when the frame region is reduced by bending the frame region positioned on the terminal side, the wiring line arranged in the frame region may be broken.

For example, Patent Literature (PTL) 1 discloses a flexible display device in which a bending hole is formed, and accordingly a part of each of a buffer film, a gate insulating film, and an interlayer insulating film corresponding to a bending region is removed and disconnection of a wiring line is prevented from occurring.

CITATION LIST

Patent Literature

SUMMARY OF INVENTION

Technical Problem

In a manufacturing process of a flexible organic EL display device, a mother substrate on which a plurality of organic EL display devices is arranged in a matrix is divided by laser light, and the organic EL display devices are individually cut out. Here, in the organic EL display device having flexibility, an inorganic insulating film such as a base coat film, a gate insulating film, an interlayer insulating film, and the like is provided on a resin substrate, and thus, when the mother substrate is divided by laser light, a crack may occur in the inorganic insulating film being present on an end face (end edge) of the cut-out organic EL display device, and this crack may progress to the display region. In this case, moisture, oxygen, or the like enters the interior of the display region from the crack, and as a result, there is a risk of poor display.

The present invention has been contrived in consideration of the circumstances, an object of the present invention is to suppress the occurrence or progress of a crack in an inorganic insulating film at an end edge of an organic EL display device.

Solution to Problem

To achieve the object described above, a display device according to the present invention is a display device including a resin substrate, a TFT layer provided on the resin substrate and including at least one layer of an inorganic insulating film layered on the resin substrate, a light-emitting element configuring a display region provided on the TFT layer, a frame region provided around the display region, and a terminal portion provided at an end portion of the frame region and arrayed with a plurality of terminals, in which the frame region is provided with a plurality of lead wiring lines extending in parallel to one another in a direction intersecting an end edge on a terminal side of the resin substrate along the terminal portion and being electrically connected to the plurality of terminals respectively, between the end edge on the terminal side and the display region, the at least one layer of the inorganic insulating film is provided with a first opening penetrating the inorganic insulating film and causing at least a part of an upper face of the resin substrate to be exposed, a first filling layer is provided to cover an edge portion of the first opening in an interior of the first opening, and the plurality of lead wiring lines is provided up to the end edge on the terminal side in contact with upper faces of the at least one layer of the inorganic insulating film and the first filling layer.

Advantageous Effects of Invention

According to the present invention, between the end edge on the terminal side and the display region, the at least one layer of the inorganic insulating film is provided with the first opening penetrating the inorganic insulating film and causing the at least the part of the upper face of the resin substrate to be exposed, and thus, it is possible to suppress the occurrence or progress of a crack in the inorganic insulating film at the end edge of the display device.

DESCRIPTION OF EMBODIMENTS

Embodiments of the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to each embodiment to be described below.

First Embodiment

FIG. 1toFIG. 6illustrate a first embodiment of a display device according to the present invention. Note that, in each of the following embodiments, an organic EL display device including an organic EL element will be exemplified as a display device including a light-emitting element. Here,FIG. 1is a plan view of an organic EL display device30aaccording to the present embodiment. Additionally,FIG. 2is a cross-sectional view of the organic EL display device30ataken along a line II-II inFIG. 1. Additionally,FIG. 3is an equivalent circuit diagram of a TFT layer29included in the organic EL display device30a. Additionally,FIG. 4is a cross-sectional view of an organic EL layer16included in the organic EL display device30a. Additionally,FIG. 5is a plan view illustrating a region between a terminal portion T and an end edge Ea on a terminal side of a resin substrate layer10in a frame region F of the organic EL display device30a. Additionally,FIG. 6is a cross-sectional view illustrating the region between the terminal portion T and the end edge Ea on the terminal side of the organic EL display device30a, and is the cross-sectional view taken along a line VI-VI inFIG. 5.

As illustrated inFIG. 1, the organic EL display device30aincludes a display region D defined to have a rectangular shape and configured to display an image, and the frame region F defined around the display region D (a hatched portion in the figure). Note that in the present embodiment, the display region D having the rectangular shape has been exemplified, but examples of the rectangular shape include a substantially rectangular shape such as a shape whose sides are arc-shaped, a shape whose corners are arc-shaped, a shape in which a part of a side has a notch and the like.

As illustrated inFIG. 2, the display region D is provided with an organic EL element19and a plurality of pixels arrayed in a matrix. Note that each of the pixels in the display region D includes, for example, a subpixel for display of red gray scale, a subpixel for display of green gray scale, and a subpixel for display of blue gray scale. These subpixels are arrayed adjacent to one another.

As illustrated inFIG. 1, the terminal portion T arrayed with a plurality of terminals34is provided at the right end portion of the frame region F in the figure. Further, as illustrated inFIG. 1, between the display region D and the terminal portion T in the frame region F, a bending portion B being bendable at 180 degrees (in a U shape) while taking a vertical direction in the figure as a bending axis, is provided along one side (right side in the figure) of the display region D.

As illustrated inFIG. 2, the organic EL display device30aincludes, in the display region D, the resin substrate layer10, the TFT layer29provided on the resin substrate layer10, the organic EL element19provided, as a light-emitting element, on the TFT layer29, a front face side protection layer20aprovided on the organic EL element19, and a rear face side protection layer20bprovided on the rear face of the resin substrate layer10.

The resin substrate layer10is formed of, for example, an organic resin material, such as polyimide resin, acrylic resin, polysiloxane resin, or novolac resin, with a thickness of approximately from 10 μm to 20 μm, and is provided as a resin substrate.

As illustrated inFIG. 2, the TFT layer29includes a base coat film11aprovided on the resin substrate layer10, a plurality of first TFTs12a(seeFIG. 3) and a plurality of second TFTs12bprovided on the base coat film11a, and a TFT flattening film13provided on each of the first TFTs12aand the second TFTs12b. Here, as illustrated inFIG. 3, the TFT layer29is provided with a plurality of gate lines26extending in parallel to one another in a horizontal direction in the figure. In addition, as illustrated inFIG. 3, the TFT layer29is provided with a plurality of source lines27aextending in parallel to one another in a vertical direction in the figure. Also, as illustrated inFIG. 3, the TFT layer29is provided with a plurality of power source lines27bbeing adjacent to the corresponding source lines27aand extending in parallel to one another in the vertical direction in the figure. In addition, as illustrated inFIG. 3, the TFT layer29is provided with, in each subpixel, the first TFT12a, the second TFT12b, and a capacitor28.

The base coat film11ais configured of, for example, a single layer film or a layered film of an inorganic insulating film made of, for example, silicon nitride, silicon oxide, silicon oxynitride, or the like.

As illustrated inFIG. 3, the first TFT12ais connected to the corresponding gate line26and source line27ain each subpixel. Additionally, as illustrated inFIG. 3, the second TFT12bis connected to the corresponding first TFT12aand power source line27bin each subpixel. Here, each of the first TFT12aand the second TFT12bincludes, for example, a semiconductor layer provided in an island shape on the base coat film11a, a gate insulating film6a(seeFIG. 6) provided to cover the semiconductor layer, a gate electrode provided to overlap with a part of the semiconductor layer on the gate insulating film6a, an interlayer insulating film9a(seeFIG. 6) provided to cover the gate electrode, and a source electrode and a drain electrode provided in a manner spaced apart from each other on the interlayer insulating film9a. Note that, although in the present embodiment, the first TFT12aand the second TFT12bthat are a top-gate type are exemplified, the first TFT12aand the second TFT12bthat are a bottom-gate type may be applicable.

As illustrated inFIG. 3, the capacitor28is connected to the corresponding first TFT12aand power source line27bin each subpixel. Here, the capacitor28is configured of, for example, one electrode formed of an identical material in an identical layer to the gate electrode, the other electrode formed of an identical material in an identical layer to the source electrode and the drain electrode, and the interlayer insulating film9a(seeFIG. 6) provided between the pair of these electrodes.

The TFT flattening film13is formed of, for example, a colorless and transparent organic resin material such as polyimide resin.

As illustrated inFIG. 2, the organic EL element19includes a plurality of first electrodes14, an edge cover15, a plurality of organic EL layers16, a second electrode17, and a sealing film18, which are provided on the TFT flattening film13in this order.

As illustrated inFIG. 2, the plurality of first electrodes14is provided, corresponding to a plurality of subpixels, in a matrix on the TFT flattening film13. Here, as illustrated inFIG. 2, the first electrode14is connected to the drain electrode of the second TFT12bthrough a contact hole formed in the TFT flattening film13. Additionally, the first electrode14functions to inject holes into the organic EL layer16. In addition, it is further preferable that the first electrode14be formed of a material having a large work function to improve the efficiency of hole injection into the organic EL layer16. Here, examples of materials that constitute the first electrode14include metal materials, such as silver (Ag), aluminum (Al), vanadium (V), cobalt (Co), nickel (Ni), tungsten (W), gold (Au), calcium (Ca), titanium (Ti), yttrium (Y), sodium (Na), ruthenium (Ru), manganese (Mn), indium (In), magnesium (Mg), lithium (Li), ytterbium (Yb), lithium fluoride (LiF) and the like. Moreover, examples of materials that constitute the first electrode14may include alloys such as magnesium (Mg)-copper (Cu), magnesium (Mg)-silver (Ag), sodium (Na)-potassium (K), astatine (At)-astatine oxide (AtO2), lithium (Li)-aluminum (Al), lithium (Li)-calcium (Ca)-aluminum (Al), lithium fluoride (LiF)-calcium (Ca)-aluminum (Al) and the like. Furthermore, examples of materials that constitute the first electrode14may include electrically conductive oxides such as tin oxide (SnO), zinc oxide (ZnO), indium tin oxide (ITO), and indium zinc oxide (IZO). Additionally, the first electrode14may be formed by layering a plurality of layers formed of any of the above-mentioned materials. Note that, examples of materials having the large work function include indium tin oxide (ITO), indium zinc oxide (IZO) and the like.

As illustrated inFIG. 2, the edge cover15is provided in a lattice pattern to cover the peripheral portion of each first electrode14. Here, examples of materials that constitute the edge cover15include an inorganic insulating film formed of, for example, silicon oxide (SiO2), silicon nitride (SiNx (x is a positive number)) such as trisilicon tetranitride (Si3N4), silicon oxynitride (SiON), or the like, and an organic film formed of, for example, polyimide resin, acrylic resin, polysiloxane resin, novolac resin, or the like.

As illustrated inFIG. 2, the plurality of organic EL layers16is arranged on each of the first electrodes14and is provided in a matrix in such a manner as to correspond to the plurality of subpixels. Here, as illustrated inFIG. 4, each of the organic EL layers16includes a hole injection layer1, a hole transport layer2, a light-emitting layer3, an electron transport layer4, and an electron injection layer5which are provided on the first electrode14in this order.

The hole injection layer1is also referred to as an anode buffer layer, and functions to reduce the energy level difference between the first electrode14and the organic EL layer16, to improve the efficiency of hole injection into the organic EL layer16from the first electrode14. Here, examples of materials constituting the hole injection layer1include triazole derivatives, oxadiazole derivatives, imidazole derivatives, polyarylalkane derivatives, pyrazoline derivatives, phenylenediamine derivatives, oxazole derivatives, styrylanthracene derivatives, fluorenone derivatives, hydrazone derivatives, stilbene derivatives and the like.

The electron injection layer5functions to reduce the energy level difference between the second electrode17and the organic EL layer16, to improve the efficiency of electron injection into the organic EL layer16from the second electrode17. Because of this function, the drive voltage for the organic EL element19can be reduced. Note that the electron injection layer5is also referred to as a cathode buffer layer. Here, examples of materials constituting the electron injection layer5include inorganic alkaline compounds, such as lithium fluoride (LiF), magnesium fluoride (MgF2), calcium fluoride (CaF2), strontium fluoride (SrF2), barium fluoride (BaF2) and the like, aluminum oxide (Al2O3), strontium oxide (SrO) and the like.

As illustrated inFIG. 2, the second electrode17is disposed to cover the organic EL layers16and the edge cover15. Additionally, the second electrode17functions to inject electrons into the organic EL layer16. In addition, it is further preferable that the second electrode17include a material having a small work function to improve the efficiency of electron injection into the organic EL layer16. Here, examples of materials that constitute the second electrode17include silver (Ag), aluminum (Al), vanadium (V), cobalt (Co), nickel (Ni), tungsten (W), gold (Au), calcium (Ca), titanium (Ti), yttrium (Y), sodium (Na), ruthenium (Ru), manganese (Mn), indium (In), magnesium (Mg), lithium (Li), ytterbium (Yb), lithium fluoride (LiF) and the like. Additionally, the second electrode17may be formed of an alloy such as magnesium (Mg)-copper (Cu), magnesium (Mg)-silver (Ag), sodium (Na)-potassium (K), astatine (At)-astatine oxide (AtO2), lithium (Li)-aluminum (Al), lithium (Li)-calcium (Ca)-aluminum (Al), lithium fluoride (LiF)-calcium (Ca)-aluminum (Al) and the like, for example. Additionally, the second electrode17may be formed of electrically conductive oxide, such as tin oxide (SnO), zinc oxide (ZnO), indium tin oxide (ITO), and indium zinc oxide (IZO). Moreover, the second electrode17may be formed by layering a plurality of layers formed of any of the above-mentioned materials. Note that, examples of materials having a small work function include magnesium (Mg), lithium (Li), lithium fluoride (LiF), magnesium (Mg)/copper (Cu), magnesium (Mg)/silver (Ag), sodium (Na)/potassium (K), lithium (Li)/aluminum (Al), lithium (Li)/calcium (Ca)/aluminum (Al), lithium fluoride (LiF)/calcium (Ca)/aluminum (Al) and the like.

As illustrated inFIG. 2, the sealing film18includes a first inorganic film provided to cover the second electrode17, an organic film provided on the first inorganic film, and a second inorganic film provided to cover the organic film, and functions to protect the organic EL layer16from moisture, and oxygen. Here, the first inorganic film and the second inorganic film are formed of, for example, an inorganic material such as silicon oxide (SiO2), aluminum oxide (Al2O3), silicon nitride (SiNx (x is a positive number)) such as trisilicon tetranitride (Si3N4), silicon carbonitride (SiCN), or the like. Further, the organic film described above is formed of, for example, an organic material such as acrylic resin, polyurea resin, parylene resin, polyimide resin, polyamide resin and the like.

The front face side protection layer20aand the rear face side protection layer20bare formed of, for example, polyimide resin or the like with a thickness of approximately 2 μm. Furthermore, a function film such as a touch panel layer, for example, may be included as the front face side protection layer20a.

As illustrated inFIG. 5andFIG. 6, the organic EL display device30aincludes, in the frame region F, the resin substrate layer10, an inorganic layered film La and a first filling film21provided on the resin substrate layer10, a plurality of lead wiring lines22(hatched portions inFIG. 5) provided on the inorganic layered film La and the first filling film21, and a first flattening film23provided to cover the plurality of lead wiring lines22. Note that, in the plan view ofFIG. 5, the first filling film21and the first flattening film23are omitted.

The inorganic layered film La is at least one layer of an inorganic insulating film that constitutes the TFT layer29. As illustrated inFIG. 6, the inorganic layered film La includes the base coat film11a(first inorganic insulating film) serving as a moisture-proof film, the gate insulating film6a(second inorganic insulating film), and the interlayer insulating film9aformed of a first interlayer insulating film7a(third inorganic insulating film) and a second interlayer insulating film8a(fourth inorganic insulating film), which are layered on the resin substrate layer10in this order. That is, the inorganic layered film La is configured of four layers of inorganic insulating films.

Here, as illustrated inFIG. 5andFIG. 6, in the organic EL display device30a, between the end edge Ea on the terminal side of the resin substrate layer10along the terminal portion T and the display region D in the frame region F (seeFIG. 1), the inorganic layered film La is provided with a first opening Sa that penetrates the inorganic layered film La to cause a certain region (at least a part) of the upper face of the resin substrate layer10to be exposed.

Specifically, the first opening Sa in which the base coat film11a, the gate insulating film6a, and the interlayer insulating film9aof the inorganic layered film La are not provided is formed between the end edge Ea on the terminal side and the terminal portion T. As illustrated inFIG. 6, the first opening Sa is formed in such a manner as to penetrate the inorganic layered film La in a thickness direction Z thereof.

Additionally, as illustrated inFIG. 5andFIG. 6, in the organic EL display device30a, the first opening Sa is provided along the end edge Ea on the terminal side to the end edge Ea on the terminal side. In other words, the inorganic layered film La is not formed on the resin substrate layer10at the end edge Ea on the terminal side. That is, the inorganic layered film La is not present on the end edge Ea on the terminal side.

Also, as illustrated inFIG. 5, the first opening Sa is provided in a certain region extending along the end edge Ea on the terminal side from the end edge Ea on the terminal side toward the terminal portion T in an extending direction (direction X) of the lead wiring lines22.

In this manner, in the organic EL display device30a, the inorganic layered film La is provided at a certain distance separated from the end edge Ea on the terminal side.

As illustrated inFIG. 6, the first filling layer21is provided in an interior of the first opening Sa in such a manner as to cover an edge portion of the first opening Sa. Specifically, as illustrated inFIG. 5andFIG. 6, the first filling layer21is provided to cover the upper face of the resin substrate layer10exposed at the first opening Sa and to fill the interior of the first opening Sa. Furthermore, at the end edge Ea on the terminal side, the upper face of the resin substrate layer10and the first filling layer21are in contact with each other. In other words, the first opening Sa is a through-hole that makes the upper face of the resin substrate layer10and the first filling layer21be in contact with each other at the end edge Ea on the terminal side.

As illustrated inFIG. 5, the plurality of (six inFIG. 5) lead wiring lines22extends in parallel to each other to the terminal portion T in a direction intersecting the end edge Ea on the terminal side (direction X inFIG. 5) in the frame region F, and is electrically connected to the plurality of terminals34disposed on the terminal portion T respectively.

Also, as illustrated inFIG. 5andFIG. 6, between the end edge Ea on the terminal side and the display region D, the lead wiring lines22are provided to the end edge Ea on the terminal side in contact with the upper faces of the inorganic layered film La (specifically, the second interlayer insulating film8a) and the first filling layer21.

The lead wiring line22is configured of, for example, a metal layered film of a titanium film (with a thickness of approximately 200 nm)/an aluminum film (with a thickness of approximately 100 nm)/a titanium film (with a thickness of approximately 200 nm), or the like. Note that, although in the present embodiment, the example of the lead wiring line22configured of a metal layered film is given, the lead wiring line22may also be configured of a metal single layer film. Furthermore, the lead wiring line22may be constituted by an identical material to the source line27a. Further, the lead wiring line22may be formed in an identical layer by using an identical material to the terminal34.

As illustrated inFIG. 6, the first flattening film23is provided on the plurality of lead wiring lines22in contact with the plurality of lead wiring lines22. Specifically, the first flattening film23is provided to cover the second interlayer insulating film8aand the plurality of lead wiring lines22of the inorganic layered film La, and the upper face of the second interlayer insulating film8a, the plurality of lead wiring lines22and the first flattening film23are in contact with one another.

Each of the first filling film21and the first flattening film23is configured of, for example, an organic insulating film made of polyimide resin, or the like with a thickness of approximately 2 μm. Specifically, the first flattening film23is provided in an identical layer by using an identical material to the edge cover15included in the organic EL element19.

The organic EL display device30adescribed above has flexibility, and is configured, in each subpixel, such that the light-emitting layer3of the organic EL layer16is caused to appropriately emit light via the first TFT12aand the second TFT12bso that images are displayed.

The organic EL display device30aof the present embodiment can be manufactured as will be described below.

For example, first, the organic EL display device30acan be manufactured such that the TFT layer29and the organic EL element19are formed, by using a well-known method, on the resin substrate layer10formed on a glass substrate, the front face side protection layer20ais bonded on the organic EL element19with an adhesive layer interposed therebetween, and then the rear face side protection layer20bis bonded to the rear face of the resin substrate layer10from which the glass substrate has been peeled off, with an adhesive layer interposed therebetween.

Here, the organic EL display device30acan be manufactured by forming the first opening Sa in the inorganic layered film La between the end edge Ea on the terminal side and the display region D, forming the first filling layer21in the interior of the first opening Sa in such a manner as to cover the edge portion of the first opening Sa, and forming, in the frame region F, the plurality of lead wiring lines22extending to the end edge Ea on the terminal side in contact with the upper faces of the inorganic layered film La and the first filling layer21.

Specifically, before the formation of the source electrode and the drain electrode of the TFT12included in the organic EL element19, the first opening Sa is formed by forming and patterning the inorganic layered film La only between the end edge Ea on the terminal side and the display region D. Before the formation of the source electrode and the drain electrode of the TFT12, the first filling layer21is formed by forming and patterning a photosensitive organic insulating film using polyimide resin, or the like in the interior of the first opening. The plurality of lead wiring lines22is formed when the source electrode and the drain electrode of the TFT12are formed.

By dividing, by laser light, a mother substrate in which the organic EL display devices30amanufactured by the above-described process are arranged in a matrix, a single organic EL display device30acan be obtained. Here, in the mother substrate, the lead wiring lines22of each organic EL display device30aare electrically connected to a short ring (anti-static short circuit wiring line).

Note that the configuration described above in the organic EL display device30ais not limited between the end edge Ea on the terminal side and the display region D, and can be also provided between an end edge Eb, Ec, or Ed, which is not on the terminal side, other than the end edge Ea on the terminal side illustrated inFIG. 1and the display region D. In addition, even when the configuration is not provided on all four circumferential end edges of the display device, for example, in a case of a substantially rectangular display region D in which there is a notch in a part of a side, the configuration may be provided only in a recessed portion, such as the notch portion, where a crack is likely to occur.

As described above, according to the organic EL display device30aof the present embodiment, the first opening Sa is provided in the inorganic layered film La between the end edge Ea on the terminal side and the display region D, and penetrates the inorganic layered film La to cause a certain region on the upper face of the resin substrate layer10to be exposed. The first opening Sa is provided along the end edge Ea on the terminal side to the end edge Ea on the terminal side, so the inorganic layered film La is not present on the end edge Ea on the terminal side. Thus, since the inorganic layered film La is provided at a certain distance separated from the end edge Ea on the terminal side, the occurrence of a crack in the inorganic layered film La at the end edge Ea on the terminal side can be suppressed, and poor display can be prevented from occurring.

In addition, according to the organic EL display device30aof the present embodiment, since the upper face of the resin substrate layer10and the first filling layer21are in contact with each other at the end edge Ea on the terminal side, the end edge Ea on the terminal side is reinforced. Therefore, the occurrence of a crack in the inorganic layered film La at the end edge Ea on the terminal side can be further suppressed.

Second Embodiment

A second embodiment of the present invention will be described below.FIG. 7is a plan view illustrating a region between the end edge Ea on the terminal side and the terminal portion T of an organic EL display device30baccording to the present embodiment, and is a diagram corresponding toFIG. 5. Additionally,FIG. 8is a cross-sectional view, which is taken along a line VIII-VIII inFIG. 7, illustrating the region between the end edge Ea on the terminal side and the terminal portion T of the organic EL display device30b, and is a diagram corresponding toFIG. 6. Note that an overall configuration, of the organic EL display device30b, including the display region D, the frame region F, and the like, other than the region between the end edge Ea on the terminal side and the display region D, is identical to that of the first embodiment described above, and thus, detailed description thereof will be omitted here. Note that constituent portions similar to those in the first embodiment described above are denoted by the identical reference signs, and description thereof will be omitted.

Although in the first embodiment described above, the example of the organic EL display device30ain which the inorganic layered film La is not present in the end edge Ea on the terminal side is given, an example of the organic EL display device30bin which a base coat film11bis provided on the resin substrate layer10is given in the present embodiment.

In the organic EL display device30b, as illustrated inFIG. 7andFIG. 8, the base coat film11bis provided between the resin substrate layer10and the first filling layer21at the end edge Ea on the terminal side. Note that in the plan view ofFIG. 7, the first filling layer21and the first flattening film23are omitted.

Specifically, as illustrated inFIG. 7andFIG. 8, in a first opening portion Sb, the base coat film11bis layered on the exposed resin substrate layer10at a predetermined interval with the inorganic layered film La, and the first filling layer21is provided to cover the upper face of the base coat film11b. As illustrated inFIG. 7andFIG. 8, the base coat film11bis provided along the end edge Ea on the terminal side to the end edge Ea on the terminal side.

Thus, as illustrated inFIG. 7andFIG. 8, in the organic EL display device30b, the base coat film11bis separated from the base coat film11aof the inorganic layered film La by the first opening Sb.

Note that, in a case of a top-gate type TFT in the organic EL display device30b, a semiconductor layer, for example, formed of the identical material in the identical layer to the semiconductor layer of the first TFT12aincluded in the TFT layer29may be provided between the base coat film11band the first filling layer21at the end edge Ea on the terminal side.

Alternatively, in a case of a bottom gate type TFT, a gate layer, for example, formed of the identical material in the identical layer to the gate electrode of the first TFT12aincluded in the TFT layer29, may be provided between the base coat film11band the first filling layer21at the end edge Ea on the terminal side.

In these cases, since the semiconductor layer or the gate layer functions as a stopper for etching the base coat film11b, the base coat film11bcan be provided without separately forming a resist on the inorganic layered film.

The organic EL display device30bof the present embodiment can be manufactured by modifying a pattern shape of the inorganic layered film La in the manufacturing method of the organic EL display device30aof the above-described first embodiment.

Note that the configuration described above in the organic EL display device30bis not limited between the end edge Ea on the terminal side and the display region D, and may be provided between the end edge Eb, Ec, or Ed not being on the terminal side and the display region D. In addition, even when the configuration is not provided on all four circumferential end edges of the display device, for example, in a case of a substantially rectangular display region D in which there is a notch in a part of a side, the configuration may be provided only in a recessed portion, such as the notch portion, where a crack is likely to occur.

According to the organic EL display device30bof the present embodiment described above, the base coat film11bis provided between the resin substrate layer10and the first filling layer21at the end edge Ea on the terminal side. Since the base coat film11bis separated from the base coat film11aof the inorganic layered film La by the first opening Sb, even when a crack occurs in the base coat film11bat the end edge Ea on the terminal side, the progress of the crack to the display region D can be suppressed, and poor display can be prevented from occurring.

In addition, according to the organic EL display device30bof the present embodiment, the first filling layer21is provided to cover the upper face of the base coat film11b, and thus the base coat film11bat the end edge Ea on the terminal side is reinforced. Therefore, the occurrence of a crack in the base coat film11bat the end edge Ea on the terminal side can be suppressed.

Furthermore, according to the organic EL display device30bof the present embodiment, the base coat film11bis provided on the resin substrate layer10at the end edge Ea on the terminal side, and thus, the permeation of moisture, oxygen, and the like from the end edge Ea on the terminal side to the interior of the display region D can be suppressed.

Third Embodiment

A third embodiment of the present invention will be described below.FIG. 9is a plan view illustrating the bending portion B in the frame region F of an organic EL display device30caccording to the present embodiment. Also,FIG. 10is a cross-sectional view illustrating the bending portion B of the organic EL display device30c, and is the cross-sectional view taken along a line X-X inFIG. 9. Note that an overall configuration, of the organic EL display device30c, including the display region D, the frame region F, and the like, other than the bending portion B, is identical to that of the first embodiment described above, and thus, detailed description thereof will be omitted. Note that constituent portions similar to those in the first embodiment described above are denoted by the identical reference signs, and description thereof will be omitted.

In the first embodiment and the second embodiment described above, the organic EL display devices30aand30bin which the first opening Sa or Sb is provided between the end edge Ea on the terminal side and the display region D have been exemplified, but in the present embodiment, the organic EL display device30cin which a slit U is provided in the bending portion B is exemplified.

In the organic EL display device30c, as illustrated inFIG. 1, the bending portion B is provided between the end edge Ea on the terminal side and the display region D in the frame region F in such a manner as to extend in one direction (a direction Y inFIG. 1) between the display region D and the terminal portion T.

As illustrated inFIG. 9andFIG. 10, the organic EL display device30cincludes, in the bending portion B, the resin substrate layer10, the inorganic layered film La and a second filling layer24that are provided on the resin substrate layer10, a plurality of frame wiring lines25provided on the inorganic layered film La and the second filling film24(hatched portions inFIG. 9), and the first flattening film23provided to cover the plurality of frame wiring lines25. Note that in the plan view inFIG. 9, the first flattening film23and the second filling layer24are omitted.

Here, as illustrated inFIG. 9andFIG. 10, in the organic EL display device30c, the inorganic layered film La is provided with, in the bending portion B, the slit U penetrating the inorganic layered film La to cause the upper face of the resin substrate layer10to be exposed.

Specifically, in the bending portion B, the slit U is formed in which the base coat film11a, the gate insulating film6a, and the interlayer insulating film9aof the inorganic layered film La are not provided. As illustrated inFIG. 10, the slit U is formed by penetrating the inorganic layered film La in a thickness direction Z thereof.

Also, in the organic EL display device30c, as illustrated inFIG. 9andFIG. 10, the slit U is provided along an extending direction of the bending portion B (direction Y inFIG. 9), that is, to both end edges (both ends in the direction Y) of the bending portion B. In other words, the inorganic layered film La is not formed on the resin substrate layer10in the slit U of the bending portion B. That is, the inorganic layered film La is not present in the slit U.

In this manner, in the organic EL display device30c, the inorganic layered film La is separated by the slit U in the bending portion B.

As illustrated inFIG. 10, the second filling layer24is provided in an interior of the slit U in such a manner as to cover an edge portion of the slit U. Specifically, as illustrated inFIG. 10, the second filling layer24is provided to cover the upper face of the resin substrate layer10exposed at the slit U, and to fill the interior of the slit U. Furthermore, at the end edge Ea on the terminal side, the upper face of the resin substrate layer10and the second filling layer24are in contact with each other. In other words, the slit U is a through-hole that causes the upper face of the resin substrate layer10and the second filling layer24to be directly in contact with each other in the bending portion B. In addition, the second filling layer24is formed of the identical material in the identical layer to those of the first filling layer21.

As illustrated inFIG. 9, the plurality (six inFIG. 9) of frame wiring lines25is provided in the bending portion B in such a manner as to extend in parallel to each other in a direction (direction X inFIG. 9) intersecting an extending direction (direction Y inFIG. 9) of the bending portion B. Furthermore, the plurality of frame wiring lines25is electrically connected to a plurality of display wiring lines (gate lines26, source lines27a, power source lines27b, and the like) respectively, illustrated inFIG. 3and the plurality of terminals34that are provided to extend in parallel to one another in a direction intersecting the extending direction of the bending portion B provided in the display region D.

Specifically, as illustrated inFIG. 10, both end portions of the frame wiring line25are connected to the first gate conductive layer26aand a second gate conductive layer26brespectively via contact holes Ca and Cb formed in the first interlayer insulating film7aand the second interlayer insulating film8a. Then, the first gate conductive layer26ais connected to the terminals34, and the second gate conductive layer26bis connected to the display wiring lines described above. Note that, although in the present embodiment, the example of the frame wiring lines25connected to the first gate conductive layer26aand the second gate conductive layer26bis given, the frame wiring lines25may be connected to a conductive layer of another layer.

In addition, as illustrated inFIG. 10, the frame wiring lines25are provided in the bending portion B in contact with the upper faces of the inorganic layered film La (specifically, the second interlayer insulating film8a) and the second filling layer24.

The frame wiring lines25are provided in the identical layer by using the identical material to the lead wiring lines22. Note that, although an example of the frame wiring lines25configured of a metal layered film is given in this embodiment, the frame wiring lines25may also be configured of a metal single layer film.

As illustrated inFIG. 10, the first flattening film23is provided on the plurality of frame wiring lines25in contact with the plurality of frame wiring lines25. Specifically, the first flattening film23is provided to cover the upper face of the second interlayer insulating film8aof the inorganic layered film La and the plurality of frame wiring lines25, and each of the upper face of the second interlayer insulating film8aand the plurality of frame wiring lines25, and the first flattening film23are in contact with one another.

Note that the front face side protection layer20aand the rear face side protection layer20bwhich are disposed in the display region D are also provided in the most part of the frame region F, but are not provided in the bending portion B.

Note that the organic EL display device30cof the present embodiment can be manufactured by modifying the pattern shape of the inorganic layered film La in the bending portion B in the manufacturing method of the organic EL display device30aof the first embodiment described above.

As described above, according to the organic EL display device30cof the present embodiment, in addition to the effects of the organic EL display device30aor30bof the first or second embodiment described above, in the bending portion B, since the inorganic layered film La is separated by the slit U, the progress of a crack into the display region D can be further suppressed, and poor display can be further prevented from occurring.

Fourth Embodiment

A fourth embodiment of the present invention will be described below.FIG. 11is a cross-sectional view illustrating a region between the end edge Eb not being on the terminal side of the resin substrate layer10and the display region D in the frame region F of an organic EL display device30daccording to the present embodiment, and is the cross-sectional view taken along a line H-H inFIG. 1. Note that an overall configuration, of the organic EL display device30d, including the display region D, the frame region F, and the like, other than a region between the end edge Eb, Ec, or Ed not being on the terminal side and the display region D, is identical to that of the first embodiment described above, and thus, detailed description thereof will be omitted. Note that constituent portions similar to those in the first embodiment described above are denoted by the identical reference signs, and description thereof will be omitted.

As illustrated inFIG. 1, the end edges Eb and Ec not being on the terminal side represent respective end edges that intersect with the end edge Ea on the terminal side in the frame region F. Furthermore, as illustrated inFIG. 1, the end edge Ed not being on the terminal side indicates an end edge that faces the end edge Ea on the terminal side.

In the present embodiment, the organic EL display device30dis illustrated as a modified example of the configuration between the end edge Eb, Ec, or Ed not being on the terminal side and the display region D. Note that a configuration, which will be described below, of the organic EL display device30dmay be provided between all of the end edges Eb, Ec, and Ed not being on the terminal side and the display region D, and in a case of a substantially rectangular display region D having a notch in a part of the side thereof, the configuration may be provided only in a recessed portion, such as the notch portion, where a crack is likely to occur. In the following description, a configuration between the end edge Eb not being on the terminal side and the display region D will be described as an example.

As illustrated inFIG. 11, the organic EL display device30dincludes, between the end edge Eb not being on the terminal side other than the end edge Ea on the terminal side and the display region D, the resin substrate layer10, the inorganic layered film La and residual layers Lb thereof provided on the resin substrate layer10, the second flattening film31provided on the inorganic layered film La, and a layered film32of the first inorganic film and the second inorganic film that configure the sealing film18provided to cover the upper face of the resin substrate layer10, the inorganic layered film La, the residual layers Lb, and the second flattening film31.

Here, in the organic EL display device30d, as illustrated inFIG. 11, the inorganic layered film La is provided with a plurality of second openings Va that is provided to be spaced apart from each other between the end edge Eb not being on the terminal side and the display region D, and that penetrates the inorganic layered film La to cause at least a part of the upper face of the resin substrate layer10to be exposed.

Specifically, the plurality of second openings Va is formed between the end edge Eb not being on the terminal side and the display region D without providing the base coat film11a, the gate insulating film6a, and the interlayer insulating film9aof the inorganic layered film La. As illustrated inFIG. 11, the second opening Va is formed by penetrating the inorganic layered film La in a thickness direction Z thereof.

Moreover, as illustrated inFIG. 11, each of a plurality of the residual layers Lb of the inorganic layered film La is provided in a slit shape along the end edge Eb not being on the terminal side between the second openings Va adjacent to each other among the plurality of second openings Va.

Also, in the organic EL display device30d, as illustrated inFIG. 11, the second opening Va on a side of the end edge Eb not being on the terminal side among the plurality of second openings Va is provided along the end edge Eb not being on the terminal side to the end edge Eb not being on the terminal side. In other words, no residual layer Lb is formed on the resin substrate layer10at the end edge Eb not being on the terminal side. That is, there is no residual layer Lb at the end edge Eb not being on the terminal side.

As described above, in the organic EL display device30d, the residual layer Lb is provided at a certain distance separated from the end edge Eb not being on the terminal side.

On the other hand, the second flattening film31is provided on the inorganic layered film La on a side closer to the display region D than the plurality of second openings Va. The second flattening film31is configured of, for example, an organic insulating film made of polyimide resin or the like with a thickness of approximately 2 μm.

The layered film32is provided to cover the organic EL element19. Specifically, as illustrated inFIG. 11, the layered film32is provided to cover the upper face of the resin substrate layer10, edge portions of the plurality of second openings Va, the inorganic layered film La, the residual layers Lb, and the second flattening film31.

In this manner, the layered film32is provided to cover edge portions of the plurality of residual layers Lb that are separated from one another, and thus, thick portions and thin portions are formed in the layered film32. Since the thin portion causes the layered film32to be easily separated, even when a crack occurs in the layered film32at the end edge Eb not being on the terminal side, the progress of the crack into the display region D can be suppressed.

In addition, in the organic EL display device30d, as illustrated inFIG. 11, the layered film32is not provided on the resin substrate layer10at the end edge Eb not being on the terminal side. In other words, the layered film32is not present at the end edge Eb not being on the terminal side. Note that at the end edge Eb not being on the terminal side, the layered film32may be provided on the resin substrate layer10in such a manner as to have a thickness being thinner than that of one layer of the inorganic layered film La (for example, the base coat film11a, or the like).

The organic EL display device30dof the present embodiment can be manufactured by modifying the pattern shape of the inorganic layered film La in the end edge Eb not being on the terminal side and the display region D in the manufacturing method of the organic EL display device30aof the first embodiment.

As described above, according to the organic EL display device30dof the present embodiment, the inorganic layered film La is provided with the plurality of second openings Va that is separated from one another between the end edge Eb not being on the terminal side and the display region D, and that penetrates the inorganic layered film La to cause at least a part of the upper face of the resin substrate layer10to be exposed. Among the plurality of second openings Va, the second opening Va on a side of the end edge Eb not being on the terminal side is provided to the end edge Eb on the terminal side along the end edge Eb on the terminal side, and thus, the residual layer Lb of the inorganic layered film La is not present at the end edge Eb on the terminal side. Therefore, since the residual layer Lb is provided at a certain distance separated from the end edge Eb on the terminal side, it is possible to suppress the occurrence of a crack in the residual layer Lb at the end edge Eb on the terminal side.

In addition, according to the organic EL display device30dof the present embodiment, since the layered film32is not present at the end edge Eb on the terminal side, the occurrence of a crack of the layered film32at the end edge Eb on the terminal side can be suppressed.

Furthermore, according to the organic EL display device30dof the present embodiment, thick portions and thin portions are formed in the layered film32provided to cover the edge portions of the plurality of residual layers Lb that are separated from one another. Since the thin portion causes the layered film32to be easily separated, even when a crack occurs in the layered film32, the progress of the crack in the display region D can be suppressed.

Fifth Embodiment

A fifth embodiment of the present invention will be described below.FIG. 12is a cross-sectional view, which is taken along the line H-H inFIG. 1, illustrating a region between the end edge Eb on the terminal side and the display region D of an organic EL display device30eof the present embodiment, and is a diagram corresponding toFIG. 11. Note that an overall configuration, of the organic EL display device30e, including the display region D, the frame region F, and the like, other than a region between the end edge Eb, Ec, or Ed not being on the terminal side and the display region D, is identical to that of the first embodiment described above, and thus, detailed description thereof will be omitted. Note that constituent portions similar to those in the first embodiment described above are denoted by the identical reference signs, and description thereof will be omitted.

In the fourth embodiment described above, the organic EL display device30dhas been exemplified in which the residual layer Lb is not present at the end edge Eb not being on the terminal side, but in the present embodiment, the organic EL display device30eis exemplified in which the base coat film11bis provided on the resin substrate layer10.

In the organic EL display device30e, as illustrated inFIG. 12, the base coat film11bon a side closer to the end edge Eb not being on the terminal side than a plurality of second openings Vb is provided on the resin substrate layer10to the end edge Eb not being on the terminal side along the end edge Eb not being on the terminal side. Specifically, only the base coat film11bof the residual layer Lb of the inorganic layered film La at a position closest to the end edge Eb not being on the terminal side extends to the end edge Eb not being on the terminal side.

Here, in the organic EL display device30d, as illustrated inFIG. 12, the residual layer Lb including the base coat film11bprovided to the end edge Eb not being on the terminal side is separated from the other residual layers Lb by the second openings Vb.

In addition, in the organic EL display device30e, the layered film32is not provided on the base coat film11bprovided to the end edge Eb not being on the terminal side at the end edge Eb not being on the terminal side. In other words, the layered film32is not present at the end edge Eb not being on the terminal side.

Other configurations are similar to those of the organic EL display device30daccording to the fourth embodiment described above. Accordingly, the organic EL display device30ecan obtain similar effects to those of the organic EL display device30daccording to the fourth embodiment.

The organic EL display device30eof the present embodiment can be manufactured by modifying the pattern shape of the inorganic layered film La in the end edge not being on the terminal side and the display region D in the manufacturing method of the organic EL display device30aof the first embodiment.

As described above, according to the organic EL display device30eof the present embodiment, the base coat film11bis provided on the resin substrate layer10at the end edge Eb not being on the terminal side. Since the residual layer Lb including the base coat film11bis separated from the other residual layers Lb by the second openings Vb, even when a crack occurs in the base coat film11bat the end edge Eb not being on the terminal side, the progress of the crack into the display region D can be suppressed.

In addition, according to the organic EL display device30eof the present embodiment, since the layered film32is not present on the base coat film11bat the end edge Eb not being on the terminal side, it is possible to suppress the occurrence of a crack in the layered film32at the end edge Eb not being on the terminal side.

Furthermore, according to the organic EL display device30eof the present embodiment, the base coat film11bis provided on the resin substrate layer10at the end edge Eb not being on the terminal side, and thus, the permeation of moisture, oxygen, and the like from the end edge Eb not being on the terminal side to the interior of the display region D can be suppressed.

Sixth Embodiment

A sixth embodiment of the present invention will be described below.FIG. 13is a cross-sectional view, which is taken along the line H-H inFIG. 1, illustrating a region between the end edge Eb not being on the terminal side and the display region D of an organic EL display device30fof the present embodiment, and is a diagram corresponding toFIG. 11. Note that an overall configuration, of the organic EL display device30f, including the display region D, the frame region F, and the like, other than a region between the end edge Eb, Ec, or Ed not being on the terminal side and the display region D, is identical to that of the first embodiment described above, and thus, here, detailed description thereof will be omitted. Note that constituent portions similar to those in the first embodiment described above are denoted by the identical reference signs, and description thereof will be omitted.

In the fifth embodiment described above, the organic EL display device30ehas been exemplified in which the base coat film11bis provided on the resin substrate layer10at the end edge Eb not being on the terminal side, but in the present embodiment, the organic EL display device30fis exemplified in which the upper face of the base coat film11bis covered with a third flattening film33.

In the organic EL display device30f, as illustrated inFIG. 13, the third flattening film33is provided on the base coat film11bprovided up to the end edge Eb not being on the terminal side in such a manner as to cover the upper face of the base coat film11b. Specifically, only the base coat film11bis formed on the resin substrate layer10at the end edge Eb not being on the terminal side, and the upper face of the base coat film11bis covered with the third flattening film33.

The third flattening film33is formed of, for example, an organic insulating film made of polyimide resin or the like with a thickness of approximately 2 μm.

In addition, in the organic EL display device30f, the layered film32is not provided on the third flattening film33at the end edge Eb not being on the terminal side. In other words, the layered film32is not present at the end edge Eb not being on the terminal side.

Other configurations are similar to those of the organic EL display device30eaccording to the fifth embodiment described above. Accordingly, the organic EL display device30fcan obtain similar effects to those of the organic EL display device30eof the fifth embodiment.

The organic EL display device30fof the present embodiment can be manufactured by modifying the pattern shape of the inorganic layered film La in the end edge Eb not being on the terminal side and the display region D in the manufacturing method of the organic EL display device30aof the first embodiment.

As described above, according to the organic EL display device30fof the present embodiment, since the third flattening film33is provided to cover the upper face of the base coat film11bat the end edge Eb not being on the terminal side, in addition to the effects of the organic EL display device30eof the fifth embodiment, the base coat film11bat the end edge Eb not being on the terminal side is reinforced. Therefore, the occurrence of a crack in the base coat film11bat the end edge Eb not being on the terminal side can be suppressed.

Seventh Embodiment

A seventh embodiment of the present invention will be described below.FIG. 14is a cross-sectional view, which is taken along the line H-H inFIG. 1, illustrating a region between the end edge Eb not being on the terminal side and the display region D of an organic EL display device30gof the present embodiment, and is a diagram corresponding toFIG. 11. Note that an overall configuration, of the organic EL display device30g, including the display region D, the frame region F, and the like, other than a region between the end edge Eb, Ec, or Ed not being on the terminal side and the display region D, is identical to that of the first embodiment described above, and thus, detailed description thereof will be omitted. Note that constituent portions similar to those in the first embodiment described above are denoted by the identical reference signs, and description thereof will be omitted.

In the fourth to sixth embodiments, the organic EL display device30d,30e, or30frespectively provided with the second openings Va to Vc between the end edge Eb not being on the terminal side and the display region D has been exemplified, but in the present embodiment, the organic EL display device30gfurther provided with third openings Wa is exemplified.

In the organic EL display device30g, as illustrated inFIG. 14, between the end edge Eb not being on the terminal side and the display region D, the inorganic layered film La includes, in addition to a second opening Vd, a plurality of third openings Wa that is separated from one another and that penetrates a gate insulating film6cand an interlayer insulating film9cother than the base coat film11ato cause at least a part of the upper face of the base coat film11ato be exposed.

Specifically, the plurality of third openings Wa that is not provided with the gate insulating film6cand the interlayer insulating film9c, together with the second opening portion Vd, is formed between the end edge Eb not being on the terminal side and the display region D. As illustrated inFIG. 14, the third opening Wa is formed by penetrating the gate insulating film6cand the interlayer insulating film9c, other than the base coat film11a, in a thickness direction Z thereof.

As described above, in the third opening Wa, the resin substrate layer10is not exposed, and the upper face of the resin substrate layer10is covered with the base coat film11a. In other words, the base coat film11ais provided on the resin substrate layer10in the third opening Wa.

Additionally, in the organic EL display device30g, as illustrated inFIG. 14, a plurality of the residual layers Lc of the inorganic layered film La each of which includes the gate insulating film6cand the interlayer insulating film9cis provided in a slit shape along the end edge Eb not being on the terminal side between the third openings Wa adjacent to one another among the plurality of third openings Wa.

In other words, as illustrated inFIG. 14, in the organic EL display device30g, not only the base coat film11bat the end edge Eb not being on the terminal side is separated from the base coat film11aby the second opening Vb, but also the gate insulating films6cand the interlayer insulating films9cof the residual layers Lc are separated from the gate insulating film6aand the interlayer insulating film9aof the inorganic layered film La by the plurality of third openings Wa.

On the other hand, the third opening Wa on a side closer to the end edge Eb not being on the terminal side than the second opening Vd is provided along the end edge Eb not being on the terminal side to the end edge Eb not being on the terminal side. In other words, the base coat film11bis formed on the resin substrate layer10at the end edge Eb not being on the terminal side, and the upper face of the base coat film11bis exposed. Furthermore, the third flattening film33is provided, on the base coat film11bexposed from the third opening Wa, along the end edge Eb not being on the terminal side to the end edge Eb not being on the terminal side in such a manner as to cover the upper face of the base coat film11b.

The layered film32is provided to cover the upper faces of the resin substrate layer10and the third flattening film33, the edge portions of the second opening Vd and the third openings Wa, the inorganic layered film La, the residual layers Lc, and the second flattening film31.

In this manner, the layered film32is provided to cover the edge portions of the plurality of residual layers Lc separated from one another, and thus, thick portions and thin portions are formed in the layered film32. Since the thin portion causes the layered film32to be easily separated, even when a crack occurs in the layered film32at the end edge Eb not being on the terminal side, the progress of the crack into the display region D can be suppressed.

Note that the second flattening film31is provided on the inorganic layered film La on a side closer to the display region D than the plurality of third openings Wa.

Other configurations are similar to those of the organic EL display device30faccording to the sixth embodiment described above. Accordingly, the organic EL display device30gcan obtain similar effects to those of the organic EL display device30fof the sixth embodiment.

The organic EL display device30gof the present embodiment can be manufactured by modifying the pattern shape of the inorganic layered film La in the end edge Eb not being on the terminal side and the display region D in the manufacturing method of the organic EL display device30aof the first embodiment described above.

As described above, according to the organic EL display device30gof the present embodiment, in addition to the effects of the organic EL display device30fof the sixth embodiment described above, the base coat film11ais provided on the resin substrate layer10in the third openings Wa, and thus, the permeation of moisture, oxygen, and the like to the interior of the display region D can be further suppressed.

In addition, according to the organic EL display device30gof the present embodiment, thick portions and thin portions are formed in the layered film32provided to cover the edge portions of the plurality of residual layers Lc separated from one another. Since the thin portion causes the layered film32to be easily separated, even when a crack occurs in the layered film32, the progress of the crack in the display region D can be suppressed.

Eighth Embodiment

An eighth embodiment of the present invention will be described below.FIG. 15is a cross-sectional view, which is taken along the line H-H inFIG. 1, illustrating a region between the end edge Eb not being on the terminal side and the display region D of an organic EL display device30hof the present embodiment, and is a diagram corresponding toFIG. 11. Note that an overall configuration, of the organic EL display device30h, including the display region D, the frame region F, and the like, other than a region between the end edge Eb, Ec, or Ed not being on the terminal side and the display region D, is identical to that of the first embodiment described above, and thus, detailed description thereof will be omitted. Note that constituent portions similar to those in the first embodiment described above are denoted by the identical reference signs, and description thereof will be omitted.

In the fourth to seventh embodiments, the organic EL display device30d,30e,30f, or30gprovided with the second openings Va to Vd between the end edge Eb not being on the terminal side and the display region D has been exemplified, but in the present embodiment, the organic EL display device30hprovided with only the third openings is exemplified.

In the organic EL display device30h, as illustrated inFIG. 15, a plurality of third openings Wb is provided in the inorganic layered film La between the end edge Eb not being on the terminal side and the display region D.

Specifically, no second opening is provided in the inorganic layered film La between the end edge Eb not being on the terminal side and the display region D. In other words, the base coat film11ais provided over the entirety of the resin substrate layer10between the end edge Eb not being on the terminal side and the display region D.

Furthermore, in the organic EL display device30h, the third opening Wb on a side of the end edge Eb not being on the terminal side is provided along the end edge Eb not being on the terminal to the end edge Eb not being on the terminal. In other words, the upper face of the base coat film11ais exposed at the end edge Eb not being on the terminal side. Furthermore, the third flattening film33is provided, on the base coat film11aexposed from the third opening Wb, along the end edge Eb not being on the terminal side to the end edge Eb not being on the terminal side in such a manner as to cover the upper face of the base coat film11a.

The layered film32is provided to cover the resin substrate layer10, the upper faces of the base coat film11aand the third flattening film33, the edge portions of the third openings Wb, the inorganic layered film La, the residual layers Lc, and the second flattening film31.

Other configurations are similar to those of the organic EL display device30gaccording to the seventh embodiment described above.

The organic EL display device30hof the present embodiment can be manufactured by modifying the pattern shape of the inorganic layered film La in the end edge Eb not being on the terminal side and the display region D in the manufacturing method of the organic EL display device30aof the first embodiment described above.

As described above, according to the organic EL display device30hof the present embodiment, the base coat film11ais provided on the resin substrate layer10over the entirety of the resin substrate layer10, and as a result, the permeation of moisture, oxygen, and the like into the display region D can be further suppressed.

In addition, according to the organic EL display device30hof the present embodiment, thick portions and thin portions are formed in the layered film32provided to cover the edge portions of the plurality of residual layers Lc separated from one another. Since the thin portion causes the layered film32to be easily separated, even when a crack occurs in the layered film32, the progress of the crack in the display region D can be suppressed.

Other Embodiments

In the first to sixth embodiments, the inorganic layered film La is configured of four layers in which the gate insulating film6a, the first interlayer insulating film7a, and the second interlayer insulating film8aare layered in this order on the base coat film11a, but the inorganic layered film La may be configured of a single layer of the base coat film11a, or may be configured of two layers of the base coat film11aand the gate insulating film6a.

In the fourth to sixth embodiments, the residual layers Lb of the inorganic layered film La are configured of four layers in which the gate insulating film6b, the first interlayer insulating film7b, and the second interlayer insulating film8bare layered in this order on the base coat film11b, but the residual layers Lb may be configured of a single layer of the base coat film11b, or may be configured of two layers of the base coat film11band the gate insulating film6b.

In the seventh to eighth embodiments, the inorganic layered film La and the residual layers Lc thereof are configured of four layers in which the gate insulating film6, the first interlayer insulating film7, and the second interlayer insulating film8are layered in this order on the base coat film11, but may be configured of two layers of the base coat film11and the gate insulating film6.

In each of the embodiments described above, the organic EL layer having a five-layered structure including the hole injection layer, the hole transport layer, the light-emitting layer, the electron transport layer, and the electron injection layer is exemplified, but the organic EL layer may have a three-layered structure including a hole injection-cum-transport layer, a light-emitting layer, and an electron transport-cum-injection layer.

In addition, in each of the embodiments described above, the organic EL display device including the first electrode as an anode and the second electrode as a cathode is exemplified. The present invention is also applicable to an organic EL display device in which the layered structure of the organic EL layer is reversed with the first electrode being a cathode and the second electrode being an anode.

In addition, in each of the embodiments described above, the organic EL display device including an element substrate in which the electrode of the TFT connected to the first electrode serves as the drain electrode is exemplified. The present invention is also applicable to an organic EL display device including an element substrate in which the electrode of the TFT connected to the first electrode is referred to as the source electrode.

In addition, in each of the embodiments described above, the organic EL display device is exemplified and described as a display device. The present invention is also applicable to a display device including a plurality of light-emitting elements that is driven by an electrical current. For example, the present invention is applicable to a display device including Quantum-dot Light Emitting Diodes (QLEDs) that are light-emitting elements using a quantum dot-containing layer.

INDUSTRIAL APPLICABILITY

As described above, the present invention is useful for a flexible display device.

REFERENCE SIGNS LIST