JP2018163737A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device which enables the suppression of bubble generation between an optical film and a face to stick the film to.SOLUTION: A display device according to an embodiment hereof comprises: a substrate having a display area and a peripheral area around the display area; an organic resin layer above the substrate; a light-emitting layer located above the organic resin layer in the display area; a sealing layer covering the light-emitting layer; and an optical film stuck above the sealing layer over the display and peripheral areas. The organic resin layer has: a first protrusion extending in the peripheral area; and a second protrusion located between the first protrusion and the display area in plan view. The second protrusion is located between the substrate and the sealing layer in sectional view. The optical film overlies the first and second protrusions in plan view.SELECTED DRAWING: Figure 4

Description

  Embodiments described herein relate generally to a display device.

  For example, in a display device such as an organic electroluminescence (EL) display device, an optical film having various optical functions such as a polarizer is attached to the display surface side of a substrate on which pixels are formed.

  When sticking an optical film, air bubbles may be mixed between the film and the sticking surface. Such bubbles can cause peeling of the optical film and can also cause deterioration in display quality. In particular, in the vicinity of the edge of the display device, there are steps due to the ends of various resin films included in the display device, so that bubbles are easily generated when the optical film is attached.

  When a process such as pressure defoaming (autoclave) is applied to the display device to which the optical film is attached, bubbles having a small size can be removed. However, bubbles of a somewhat large size may remain after the process.

JP 2003-139266 A

  The objective in 1 aspect of this indication is providing the display apparatus which can suppress generation | occurrence | production of the bubble between an optical film and a sticking surface.

  A display device according to an embodiment includes a base material having a display region and a peripheral region around the display region, an organic resin layer above the base material, and above the organic resin layer in the display region. A certain light emitting layer, a sealing layer covering the light emitting layer, and an optical film pasted on the sealing layer over the display region and the peripheral region. The organic resin layer includes a first protrusion that extends in the peripheral area, and a second protrusion that is positioned between the first protrusion and the display area in plan view. The second protrusion is located between the base material and the sealing layer in a cross-sectional view. The optical film overlaps with the first protrusion and the second protrusion in plan view.

  A display device according to another embodiment includes a base material having a display region and a peripheral region around the display region, an insulating layer covering the base material over the display region and the peripheral region, and the insulating layer An organic resin layer above the organic resin layer, a light emitting layer formed above the organic resin layer in the display region, a sealing layer covering the light emitting layer, and the sealing over the display region and the peripheral region And an optical film attached above the layer. The insulating layer has a first groove extending in the peripheral region. A part of the sealing layer is inside the first groove. The optical film overlaps with the first groove portion in plan view.

FIG. 1 is a plan view illustrating a schematic configuration of the display device according to the first embodiment. FIG. 2 is a diagram illustrating an example of a circuit configuration of the sub-pixel. FIG. 3 is a schematic cross-sectional view of the display device taken along line III-III in FIG. FIG. 4 is a schematic cross-sectional view of the display device taken along line IV-IV in FIG. FIG. 5 is a schematic plan view of the display device shown in FIG. FIG. 6 is a plan view for explaining the display device according to the second embodiment. FIG. 7 is a cross-sectional view for explaining a display device according to a third embodiment. FIG. 8 is a schematic plan view of a display device according to the third embodiment. FIG. 9 is a cross-sectional view for explaining a display device according to a fourth embodiment. FIG. 10 is a cross-sectional view for explaining a display device according to a fifth embodiment. FIG. 11 is a cross-sectional view for explaining a display device according to a sixth embodiment. FIG. 12 is a cross-sectional view for explaining a display device according to a seventh embodiment. FIG. 13 is a cross-sectional view for explaining a display device according to an eighth embodiment.

Several embodiments will be described with reference to the drawings.
It should be noted that the disclosure is merely an example, and those skilled in the art can easily conceive of appropriate changes while maintaining the gist of the invention are naturally included in the scope of the present invention. In addition, the drawings may be schematically represented in comparison with actual modes in order to clarify the description, but are merely examples, and do not limit the interpretation of the present invention. In each drawing, the reference numerals may be omitted for the same or similar elements arranged in succession. In addition, in the present specification and each drawing, components that perform the same or similar functions as those described above with reference to the previous drawings are denoted by the same reference numerals, and redundant detailed description may be omitted.

  In each embodiment, a display device having an organic electroluminescence (EL) display element is illustrated. However, each embodiment does not preclude the application of the individual technical ideas disclosed in each embodiment to other types of display devices.

[First Embodiment]
FIG. 1 is a plan view showing a schematic configuration of a display device 1 according to the first embodiment. The display device 1 can be used for various devices such as a smartphone, a tablet terminal, a mobile phone terminal, a personal computer, a television receiver, an in-vehicle device, a game machine, and a wearable terminal.

  The display device 1 includes a display panel 2, an optical film 3, and a flexible circuit board 4. The display panel 2 includes a display area DA that displays an image and a peripheral area SA that surrounds the display area. The display area DA has a large number of pixels PX arranged in the first direction X and the second direction Y. The first direction X and the second direction Y are directions orthogonal to each other. Furthermore, a direction orthogonal to the first direction X and the second direction Y is defined as a third direction Z. The third direction Z corresponds to the thickness direction of the display panel 2. In the present disclosure, viewing the display device 1 in parallel with the third direction Z is referred to as planar view. Further, viewing the cross section of the display device 1 parallel to the third direction Z is referred to as a cross sectional view.

  The pixel PX includes a plurality of subpixels SP corresponding to different colors. In the example of FIG. 1, the pixel PX includes a subpixel SPR corresponding to red, a subpixel SPG corresponding to green, and a subpixel SPB corresponding to blue. The subpixels SPR, SPG, SPB are arranged in the first direction X, for example. The form of the pixel PX is not limited to this example, and may include sub-pixels of other colors such as white.

  The display panel 2 has a rectangular shape having a first side S1, a second side S2, a third side S3, and a fourth side S4. The first side S1 and the second side S2 are aligned in the first direction X and are parallel to the second direction Y. The third side S3 and the fourth side S4 are aligned in the second direction Y and are parallel to the first direction X. The display panel 2 may have a shape other than a rectangle, such as a regular circle, an ellipse, or a polygon other than a quadrangle. In the example of FIG. 1, the display area DA is also rectangular, but may be another shape similar to the display panel 2.

  The display panel 2 has a terminal area TA in which a terminal portion T is provided. In the example of FIG. 1, the terminal area TA is provided between the peripheral area SA and the fourth side S4. The flexible circuit board 4 is connected to the terminal portion T via, for example, an anisotropic conductive material.

  The optical film 3 is attached to the display surface side of the display panel 2. In plan view, the optical film 3 overlaps with the entire display area DA and overlaps with at least a part of the peripheral area SA. For example, the peripheral edge of the optical film 3 is located in the vicinity of the peripheral edge of the peripheral area SA. In this case, the optical film 3 overlaps with most of the peripheral area SA. The optical film 3 may overlap with all of the peripheral area SA.

  The display panel 2 has a first protrusion P1 and a second protrusion P2 in the peripheral area SA. The optical film 3 overlaps with the protrusions P1 and P2 in plan view. Each protrusion P1, P2 will be described in detail later using FIG. 4 and FIG.

  FIG. 2 is a diagram illustrating an example of a circuit configuration of the sub-pixel SP. The sub-pixel SP includes an organic EL element OLED, a first switching element SW1, and a second switching element SW2. The anode electrode of the organic EL element OLED is connected to the power supply line PL via the first switching element SW1. The cathode electrode of the organic EL element OLED is grounded. A storage capacitor C is formed between the gate electrode and the source electrode (or drain electrode) of the first switching element SW1. The gate electrode of the first switching element SW1 is connected to the video line DL via the second switching element SW2. The gate electrode of the second switching element SW2 is connected to the scanning line GL. For example, each of the switching elements SW1 and SW2 can be composed of a polysilicon thin film transistor.

  FIG. 3 is a schematic cross-sectional view of the display device 1 taken along line III-III in FIG. Here, cross sections of the subpixels SPR, SPG, and SPB are shown. Since the subpixels SPR, SPG, and SPB have the same configuration, the constituent elements of the subpixel SPG are mainly given reference numerals, and the constituent elements of the subpixels SPR and SPB are omitted.

  The display device 1 includes the base material 5, the insulating layer 6, the organic resin layer 7, the rib 8, the sealing layer SL, the first to third passivation layers PV1 to PV3, and the optical film 3 described above. I have. Furthermore, the display device 1 includes the above-described first switching element SW1, the above-described organic EL element OLED, and the reflective layer RF as elements disposed in each subpixel SP. Note that the second switching element SW2 is not shown. Organic EL elements OLED of adjacent subpixels SP are partitioned by ribs 8.

  The substrate 5 is formed of a resin material such as polyimide and has flexibility. However, the base material 5 may be formed of other materials such as glass. The insulating layer 6 includes a first insulating layer 61 (undercoat layer), a second insulating layer 62 (gate insulating film), and a third insulating layer 63 (interlayer insulating film). The first insulating layer 61 covers the main surface of the substrate 5. A semiconductor layer SC of the first switching element SW1 is formed on the first insulating layer 61. The second insulating layer 62 covers the first insulating layer 61 and the semiconductor layer SC. The gate electrode GE of the first switching element SW1 is formed on the second insulating layer 62. The third insulating layer 63 covers the second insulating layer 62 and the gate electrode GE. The source electrode SE and the drain electrode DE of the first switching element SW1 are formed on the third insulating layer 63 and are in contact with the semiconductor layer SC through contact holes formed in the insulating layers 62 and 63.

  The organic resin layer 7 covers the third insulating layer 63, the source electrode SE, and the drain electrode DE. The organic resin layer 7 planarizes unevenness caused by the first switching element SW1 and the second switching element SW2. The first passivation layer PV <b> 1 is formed on the organic resin layer 7. The reflective layer RF is formed on the first passivation layer PV1. For example, the reflective layer RF can be formed of a material having a high light reflectance such as aluminum or silver.

  The anode electrode AE of the organic EL element OLED is formed on the reflective layer RF. The anode electrode AE is in contact with the drain electrode DE through a contact hole that penetrates the first passivation layer PV1 and the organic resin layer 7. The rib 8 is formed on the first passivation layer PV1 and the anode electrode AE. The organic light emitting layer ORG is formed on the anode electrode AE between the adjacent ribs 8. The cathode electrode CE covers the rib 8 and the organic light emitting layer ORG. The cathode electrode CE is continuously formed across the plurality of subpixels SP. The second passivation layer PV2 covers the cathode electrode CE.

  The sealing layer SL is formed on the second passivation layer PV2. The sealing layer SL covers the organic light emitting layer ORG together with the second passivation layer PV2 and the cathode electrode CE. The third passivation layer PV3 is formed on the sealing layer SL.

  The sealing layer SL can be formed of, for example, an insulating organic resin material. Each of the passivation layers PV1 to PV3 can be formed of an insulating inorganic resin material such as SiN. The anode electrode AE and the cathode electrode CE can be formed of a transparent conductive material such as ITO (indium tin oxide).

  When a video signal is supplied to the anode electrode AE via the first switching element SW1, a predetermined potential difference is generated between the anode electrode AE and the cathode electrode CE. Due to this potential difference, the organic light emitting layer ORG emits light. For example, the color emitted from the organic light emitting layer ORG of the subpixel SPR is red, the color emitted from the organic light emitting layer ORG of the subpixel SPG is green, and the color emitted from the organic light emitting layer ORG of the subpixel SPB is blue. The light emitted from the organic light emitting layer ORG of each subpixel SPR, SPG, SPB may be the same color (for example, white), and a color filter may be disposed above the sealing layer SL.

  The optical film 3 will not be specifically limited if it is a film which has the optical function layer 31, and a film which has a light transmittance. The optical film 3 includes a transparent adhesive layer 32. For example, the thickness of the optical film 3 is twice or more the thickness of the sealing layer SL. As an example, the thickness of the optical film 3 is 100 μm, and the thickness of the sealing layer SL is 10 μm. The optical functional layer 31 has a specific optical function such as a polarizing layer that passes a specific polarization component of light and absorbs other polarization components, a retardation layer that gives a phase difference to light, and a diffusion layer that diffuses light. One or more layers. The above-mentioned film having optical transparency is, for example, a protective film that protects the sealing layer SL in the display area DA during the manufacturing process. That is, in this film, after the sealing layer SL is formed and before the polarizing plate is attached, the sealing layer SL or the third passivation layer PV3 is damaged, or moisture enters the sealing layer SL from the scratch. To prevent it. The adhesive layer 32 adheres (or adheres) the optical film 3 to the display panel 2. In the example of FIG. 3, the optical film 3 is bonded to the third passivation layer PV <b> 3 by the adhesive layer 32. However, the optical film 3 may be adhered to the sealing layer SL without providing the third passivation layer PV3, or a layer other than the third passivation layer PV3 is formed on the sealing layer SL, and an optical layer is formed on this layer. The film 3 may be adhered.

  FIG. 4 is a schematic cross-sectional view of the display device 1 taken along line IV-IV in FIG. As in the cross-sectional view of FIG. 3, the insulating layer 6 is formed on the base material 5, and the organic resin layer 7 is formed on the insulating layer 6. In FIG. 4, illustration of boundaries between the first insulating layer 61, the second insulating layer 62, and the third insulating layer 63 included in the insulating layer 6 is omitted. In the display area DA, the reflective layer RF, the anode electrode AE, the cathode electrode CE, the rib 8 and the like are not shown.

  The organic resin layer 7 has a first protrusion P1 and a second protrusion P2 in the peripheral area SA. As shown in FIG. 1, the first protrusion P <b> 1 extends between the display area DA and each side S <b> 1 to S <b> 4 of the display device 1. The second protrusion P2 extends between the first protrusion P1 and the display area DA. For example, each of the protrusions P1 and P2 has a rectangular shape surrounding the display area DA. However, a part of each protrusion part P1, P2 may be interrupted, and each protrusion part P1, P2 may be bent in circular arc shape in the corner | angular part of the display apparatus 1. FIG.

  Each protrusion P1, P2 extends in parallel with the second direction Y between the display area DA and the first side S1. Also between the display area DA and the second side S2, the protrusions P1 and P2 extend in parallel with the second direction Y. Each protrusion P1, P2 extends in parallel with the first direction X between the display area DA and the third side S3. Also between the display area DA and the fourth side S4, the protrusions P1 and P2 extend in parallel with the first direction X. Thus, each protrusion part P1, P2 is mutually extended in parallel between display area DA and each edge | side S1-S4. However, there may be locations where the protrusions P1 and P2 are not parallel.

  Each protrusion P1, P2 is covered with each passivation layer PV1, PV2. Each protrusion part P1, P2 may be covered only with either one of each passivation layer PV1, PV2. The sealing layer SL formed on the second passivation layer PV2 gets over the second protrusion P2 and fills at least a part of the space between the protrusions P1 and P2. That is, the 2nd protrusion part P2 is located between the base material 5 and sealing layer SL.

  FIG. 5 is a schematic plan view of the display device 1 shown in FIG. In FIG. 5, the base material 5, the organic resin layer 7 including the projecting portions P1 and P2, the sealing layer SL, and the optical film 3 are shown, and other elements are omitted. In the example shown in FIGS. 4 and 5, the sealing layer SL does not get over the first protrusion P1. That is, the end E of the sealing layer SL is located between the protrusions P1 and P2. The upper surface of the sealing layer SL is covered with the third passivation layer PV3 up to the end E. The configuration described above is the same between the display area DA and each side S1, S3, S4.

  When the display device 1 is manufactured, the unsealed sealing layer SL formed on the second passivation layer PV2 spreads toward the sides S1 to S4. The expansion of the sealing layer SL is first suppressed by the second protrusion P2. Furthermore, the sealing layer SL overcoming the second protrusion P2 is blocked by the first protrusion P1. Thus, the shape of the sealing layer SL can be controlled by the protrusions P1 and P2.

  The sealing layer SL may get over the first protrusion P1. In this case, the end E of the sealing layer SL is located between the first protrusion P1 and each of the sides S1 to S4. Further, the end E of the sealing layer SL may be located on the top of the first protrusion P1. Furthermore, the end E of the sealing layer SL may be located on the top of the second protrusion P2. Thus, various cases are assumed for the positional relationship between the end portion E of the sealing layer SL and the projecting portions P1 and P2. However, from the viewpoint of suitably controlling the planar shape of the sealing layer SL, it is preferable that the end E of the sealing layer SL is located between the protrusions P1 and P2 as shown in FIGS. .

  As shown in FIG. 4, the thickness of the sealing layer SL decreases toward the end E in the peripheral region SA. Thereby, the upper surface of the sealing layer SL is inclined at a predetermined angle θ (for example, 2 ° to 5 °). The optical film 3 attached above the sealing layer SL is also inclined at the same angle.

  In the display device 1 having the above configuration, bubbles may be generated below the optical film 3 when the optical film 3 is attached to the display panel 2. Such bubbles are likely to occur in regions where there are irregularities due to the protrusions P1, P2 and the end E of the sealing layer SL. In FIG.4 and FIG.5, the code | symbol B is attached | subjected and the example of the bubble produced in the vicinity of the 1st protrusion part P1 is shown. The term “bubble” can be appropriately replaced with another term such as a gap, a space, or an air layer. Further, the planar shape of the bubble is not limited to the elliptical shape as shown in FIG. 5, and may be any shape such as a regular circle or a shape having a meandering outline.

  The bubbles below the optical film 3 can be generally removed by undergoing a defoaming process such as pressure defoaming (autoclave). However, large bubbles may remain after the defoaming process.

  On the other hand, if it is the structure of this embodiment, the size of the bubble which may arise in the vicinity of the edge part E of sealing layer SL can be made small. That is, as shown in FIG. 4, since the inclination of the sealing layer SL and the third passivation layer PV3 is relaxed above the second projecting portion P2, the optical film 3 and the third passivation layer PV3 are in close contact with each other. Therefore, the size of the bubble B is smaller than at least the interval between the protrusions P1 and P2. If the second protrusion P2 is eliminated and only the first protrusion P1 is provided, it is difficult to control the size of bubbles generated in the vicinity of the first protrusion P1.

  Here, as shown in FIG. 5, the width of the first protrusion P1 is defined as W1, and the width of the second protrusion P2 is defined as W2. The width W1 is constant at any position of the first protrusion P1, for example. Further, the width W2 is constant at any position of the second protrusion P2, for example. However, each width W1, W2 may not be constant. The width W1 and the width W2 are the same (W1 = W2), for example, but may be different. As an example, the width W2 may be larger than the width W1 (W2> W1).

  Further, as shown in FIG. 4, the distance in the third direction Z from the base material 5 to the top of the first protrusion P1 is D1 (first distance), and the distance from the base material 5 to the top of the second protrusion P2 is the first. The distance in the three directions Z is defined as D2 (second distance). Furthermore, the distance in the third direction Z from the base material 5 to the upper surface of the organic resin layer 7 is defined as D in the portion of the organic resin layer 7 excluding the protrusions P1 and P2.

  The distance D1 is preferably smaller than the distance D2 (D1 <D2). In this case, since the optical film 3 is gently inclined above the protrusions P1 and P2, the adhesion between the display panel 2 and the optical film 3 is improved, and the generation of bubbles is easily suppressed. As an example, the distance D2 is the same as the distance D (D2 = D). The first protruding portion P1 can be formed lower than the second protruding portion P2 and other portions of the organic resin layer 7 by using a halftone mask when forming the organic resin layer 7, for example.

  Furthermore, as shown in FIG. 5, the distance between the 1st protrusion part P1 and the 2nd protrusion part P2 is defined as d. Here, the distance d corresponds to, for example, the distance between the centers in the width direction (the first direction X in FIG. 5) of the protrusions P1 and P2. If each protrusion P1, P2 has a mountain shape having a height peak, the distance d can also be defined as the distance between these peaks.

  The distance d is preferably 50 μm or less (d ≦ 50 μm). Furthermore, the distance d is more preferably 30 μm or less (d ≦ 30 μm). If the distance d is 50 μm or less, the size of the bubbles B in the arrangement direction of the protrusions P1 and P2 (the first direction X in FIG. 5) can be controlled to 50 μm or less. Furthermore, if the distance d is 30 μm or less, the size of the bubble B in the arrangement direction of the protrusions P1 and P2 can be controlled to 30 μm or less. If the bubble B has a size of 50 μm or less, it can be almost eliminated by a general defoaming process. Even when the bubbles B cannot be completely eliminated, the size of the bubbles B can be made sufficiently small. Furthermore, if it is a bubble of 30 micrometers or less in size, it can be more suitably extinguished by a defoaming process.

  If generation | occurrence | production of a bubble can be suppressed like this embodiment, peeling of the optical film 3 can be prevented. Further, it is possible to prevent bubbles from adversely affecting the display element and the peripheral circuit. Therefore, according to the present embodiment, it is possible to obtain the display device 1 with high reliability.

In the present embodiment, an example in which the organic resin layer 7 includes two projecting portions P1 and P2 has been described. However, the organic resin layer 7 may include three or more protrusions.
FIG. 4 corresponds to a cross-sectional view before the above-described defoaming process is performed. In the display device 1 after the process, the bubbles B are completely disappeared or remain in a very small size.

[Second Embodiment]
A second embodiment will be described. Here, mainly focusing on the differences from the first embodiment, the same elements as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
FIG. 6 is a diagram for explaining the display device 1 according to the second embodiment, and shows a schematic plan view of the vicinity of the second side S2 of the display device 1 as in FIG. In FIG. 6, the organic resin layer 7 has a first protrusion P1, a plurality of second protrusions P2, and a plurality of third protrusions P3.

  The 1st protrusion part P1 is extended like the example of FIG.1 and FIG.4. Each 2nd protrusion part P2 is arranged at intervals along the 1st protrusion part P1. In the example of FIG. 6, each 2nd protrusion part P2 is connected with the 1st protrusion part P1. However, at least one of the second protrusions P2 may not be connected to the first protrusion P1.

  The third protrusions P3 are arranged at intervals along the first protrusion P1. Each third protrusion P3 is located between each second protrusion P2 and the display area DA (left side in FIG. 6) in plan view. Moreover, each 3rd protrusion part P3 is located between the base material 5 and sealing layer SL in the cross sectional view similarly to the 2nd protrusion part P2 shown in FIG.

  In the extending direction of the first protrusion P1 (second direction Y in FIG. 6), the center of each second protrusion P1 and the center of each third protrusion P3 are displaced from each other. That is, the second protrusions P2 and the third protrusions P3 are alternately arranged in the extending direction of the first protrusions P1.

  Here, the width of the first protrusion P1 is defined as W1, the width of the second protrusion P2 is defined as W2, and the width of the third protrusion P3 is defined as W3. For example, the widths W1, W2, and W3 are constant at any position of the protrusions P1, P2, and P3, respectively. However, the widths W1, W2, and W3 may not be constant. Moreover, the magnitude relationship of each width W1, W2, W3 can be determined suitably. As an example, the width W2 may be larger than the widths W1 and W3 (W2> W1, W3). Further, the width W3 may be larger than the width W1 (W3> W1).

  Further, the distance between the adjacent second protrusions P2 is defined as d1, the distance between the first protrusion P1 and the third protrusion P3 is defined as d2, and the distance between the adjacent third protrusions P3 is defined as d3. To do. The distance d1 corresponds to, for example, the distance between the centers in the arrangement direction of the adjacent second protrusions P2 (second direction Y in FIG. 6). If each 2nd protrusion part P2 is a mountain shape which has a peak of height, the distance d1 can also be defined as the distance between these peaks. The distance d2 corresponds to, for example, the distance between the centers in the width direction (first direction X in FIG. 6) of the protrusions P1 and P3. If each protrusion P1, P3 is a mountain shape having a peak of height, the distance d2 can also be defined as the distance between these peaks. The distance d3 corresponds to, for example, the distance between the centers in the arrangement direction of the adjacent third protrusions P3 (second direction Y in FIG. 6). If each 3rd protrusion part P3 is a mountain shape which has a peak of height, the distance d3 can also be defined as a distance between these peaks.

  The size of bubbles generated in the vicinity of the protrusions P1, P2, and P3 can be controlled by the distances d1, d2, and d3. For example, as shown in FIG. 6, a bubble B1 may be generated between the adjacent second protrusions P2. Further, a bubble B2 may be generated between the adjacent third protrusions P3. The size of the bubble B1 can be controlled by the distances d1 and d2. The size of the bubble B2 can be controlled by the distance d3.

  For example, the distances d1, d2, and d3 are preferably 50 μm or less (d1, d2, d3 ≦ 50 μm). Furthermore, the distances d1, d2, and d3 are more preferably 30 μm or less (d1, d2, d3 ≦ 30 μm). If the distances d1, d2, and d3 are determined in this way, the bubbles B1 and B2 can be controlled to a size that can be eliminated by the defoaming process. In particular, regarding the bubble B1, the size should be reduced in both the width direction of the first protrusion P1 (first direction X in FIG. 6) and the arrangement direction of the second protrusion P2 (second direction Y in FIG. 6). Is possible.

Although FIG. 6 shows the configuration in the vicinity of the second side S2, the same configuration can be applied to the vicinity of the first side S1, the third side S3, and the fourth side S4.
In the configuration of FIG. 6, the third protrusion P3 may not be provided. Even in this case, the size of the bubbles between the adjacent second protrusions P2 can be reduced by the action of each second protrusion P2.

[Third Embodiment]
A third embodiment will be described. Here, mainly focusing on the differences from the first embodiment, the same elements as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
FIG. 7 is a diagram for explaining the third embodiment, and shows a schematic cross-sectional view of the vicinity of the second side S2 of the display device 1 as in FIG. In FIG. 7, the display device 1 includes a first sealing layer SL1 and a second sealing layer SL2 instead of the sealing layer SL.

  The first sealing layer SL1 is formed on the second passivation layer PV2 like the sealing layer SL. The second sealing layer SL2 is formed on the third passivation layer PV3. Each sealing layer SL1, SL2 can be formed of an insulating organic resin material, for example. The optical film 3 is bonded to the second sealing layer SL2 by the adhesive layer 32.

  The first sealing layer SL1 seals the organic light emitting layer ORG. For example, the second sealing layer SL2 masks the surface of the display panel 2 other than the terminal portion T in the process of removing the inorganic film (for example, each of the passivation layers PV1 to PV3) from the surface of the terminal portion T shown in FIG. This is a resin layer.

  The organic resin layer 7 has the 1st protrusion part P1 and the 2nd protrusion part P2, similarly to 1st Embodiment. Furthermore, the organic resin layer 7 has the protrusion part P100. The protrusion P100 dams up the first sealing layer SL1 before curing in the manufacturing process, and controls the shape of the first sealing layer SL1. Each protrusion P1, P2 dams the second sealing layer SL2 before curing in the manufacturing process, and controls the shape of the second sealing layer SL2. Furthermore, each protrusion P1, P2 controls the size of the bubbles B that can be generated between the second sealing layer SL2 and the optical film 3 in the manufacturing process.

  FIG. 8 is a schematic plan view of the display device 1 according to the present embodiment. For example, as illustrated, the protrusion P100 has a rectangular shape surrounding the display area DA between the sides S1 to S4 and the display area DA. However, a part of the protrusion P100 may be interrupted, or the protrusion P100 may be bent in an arc shape at the corner of the display device 1.

  Since the second sealing layer SL2 serves as the above-described mask, it is necessary to cover the entire surface of the display panel 2 including the terminal region TA. Therefore, in the example of FIG. 8, each of the protrusions P1 and P2 is provided between the sides S1 to S3 and the display area DA, but is provided between the fourth side S4 and the display area DA. Not.

  When the display device 1 includes the first sealing layer SL1 and the second sealing layer SL2 as in the present embodiment described above, the protrusions P1 and P2 with respect to one whose end is located outside. May be provided. In addition, although the detailed structure of each protrusion part P1, P2 is the same as 1st Embodiment, the structure which further has the 3rd protrusion part P3 like 2nd Embodiment is also applicable.

[Fourth Embodiment]
A fourth embodiment will be described. Here, mainly focusing on the differences from the first embodiment, the same elements as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
FIG. 9 is a diagram for explaining the fourth embodiment, and shows a schematic cross-sectional view in the vicinity of the second side S2 of the display device 1 as in FIG. In the present embodiment, the display device 1 includes a first groove part GR1 instead of the first protrusion part P1 and the second protrusion part P2.

  The first groove part GR1 is formed in the insulating layer 6. The first groove portion GR1 may penetrate all of the first insulating layer 61, the second insulating layer 62, and the third insulating layer 63 that constitute the insulating layer 6, or the third insulating layer 63 and the second insulating layer. 62 may be penetrated, or only the third insulating layer 63 may be penetrated. The planar shape of the first groove part GR1 is the same as the planar shape of the first projecting part P1 shown in FIG. 1, for example. The width of the first groove part GR1 is, for example, constant at any position. However, the width of the first groove part GR1 may not be constant.

  The first groove part GR1 is covered with a first passivation layer PV1. Further, the first passivation layer PV1 is covered with the second passivation layer PV2 inside the first groove portion GR1. In the example of FIG. 9, the sealing layer SL fills the inside of the first groove portion GR1. The end E of the sealing layer SL overlaps with the first groove part GR1, for example. The sealing layer SL may partially fill the inside of the first groove part GR1. Further, the end portion E of the sealing layer SL may be located between the first groove portion GR1 and the second side S2.

  The third passivation layer PV3 covers the sealing layer SL. Between the end E of the sealing layer SL and the second side S2, the third passivation layer PV3 covers the first passivation layer PV1. The adhesive layer 32 of the optical film 3 is in contact with the third passivation layer PV3 without a gap. For example, similarly to the relationship between the first projecting portion P1 and the optical film 3 shown in FIG. 1, the optical film 3 overlaps the first groove portion GR1 in plan view.

  The sealing layer SL before curing formed on the second passivation layer PV2 at the time of manufacturing the display device 1 spreads toward the sides S1 to S4 of the display device 1. The sealing layer SL spreading in this way is blocked by the first groove part GR1. Therefore, the shape of the sealing layer SL can be controlled by providing the first groove portion GR1.

When the first groove portion GR1 is provided in place of the above-described protrusions P1 and P2, as is apparent from the comparison between FIG. 4 and FIG. 9, the top surface of the sealing layer SL is unlikely to be uneven. Thereby, since the optical film 3 can be stuck to the sticking surface (the upper surface of the third passivation layer PV3 in the example of FIG. 9), it is possible to prevent the generation of bubbles. Even if small bubbles are generated due to the unevenness of the sealing layer SL in the vicinity of the first groove portion GR1, it can be eliminated by the above-described defoaming process.
Although FIG. 9 shows the configuration in the vicinity of the second side S2, the same configuration can be applied to the vicinity of the first side S1, the third side S3, and the fourth side S4.

[Fifth Embodiment]
A fifth embodiment will be described. Here, mainly focusing on the differences from the fourth embodiment, the same elements as those in the fourth embodiment are denoted by the same reference numerals, and the description thereof is omitted.
FIG. 10 is a diagram for explaining the fifth embodiment, and shows a schematic cross-sectional view in the vicinity of the second side S2 of the display device 1 as in FIG. In FIG. 10, the insulating layer 6 has a second groove part GR2 in addition to the first groove part GR1.

  The second groove part GR2 extends along the first groove part GR1 in the peripheral region SA. The second groove part GR2 is located between the first groove part GR1 and the display area DA in plan view. The second groove portion GR2 may penetrate all of the first insulating layer 61, the second insulating layer 62, and the third insulating layer 63 that constitute the insulating layer 6, or the third insulating layer 63 and the second insulating layer. 62 may be penetrated, or only the third insulating layer 63 may be penetrated. The planar shape of the first groove part GR1 is, for example, the same as the first protruding part P1 shown in FIG. 1, and the planar shape of the second groove part GR2 is, for example, the same as the second protruding part P2 shown in FIG. The depth of the first groove part GR1 may be different from the depth of the second groove part GR2. As an example, the depth of the second groove part GR2 may be larger than the depth of the first groove part GR1.

  The width of each groove part GR1, GR2 is constant at any position, for example. However, the width of each groove part GR1, GR2 may not be constant. Further, the width of the first groove part GR1 and the width of the second groove part GR2 may be different. As an example, the width of the second groove part GR2 may be larger than the width of the first groove part GR1.

When the two groove portions GR1 and GR2 are provided as in the present embodiment, the shape of the sealing layer SL can be controlled with higher accuracy. The number of grooves is not limited to two and may be three or more.
In addition, although the structure in the vicinity of 2nd edge | side S2 was shown in FIG. 10, the same structure is applicable also to the vicinity of 1st edge | side S1, 3rd edge | side S3, and 4th edge | side S4.

[Sixth Embodiment]
A sixth embodiment will be described. Here, mainly focusing on the differences from the fifth embodiment, the same elements as those of the fifth embodiment are denoted by the same reference numerals, and description thereof is omitted.
FIG. 11 is a diagram for explaining the sixth embodiment, and shows a schematic cross-sectional view in the vicinity of the second side S2 of the display device 1 as in FIG. In FIG. 11, the display device 1 includes a first sealing layer SL1 and a second sealing layer SL2 as in the third embodiment.

  The insulating layer 6 has the first groove part GR1 and the second groove part GR2 as in the fifth embodiment. Furthermore, the insulating layer 6 has a groove part GR100. The groove part GR100 blocks the first sealing layer SL1 before curing in the manufacturing process, and controls the shape of the first sealing layer SL1. Each groove part GR1, GR2 dams the second sealing layer SL2 before curing in the manufacturing process, and controls the shape of the second sealing layer SL2.

  For example, the groove part GR100 can have a planar shape that surrounds the display area DA, like the protrusion part P100 shown in FIG. Similarly, each of the grooves GR1 and GR2 can have a planar shape surrounding the display area DA. As another example, like the protrusions P1 and P2 shown in FIG. 8, the grooves GR1 and GR2 are provided between the sides S1 to S3 and the display area DA, and the fourth side S4 and the display area DA. It does not need to be provided between.

  When the shape of the second sealing layer SL2 is controlled by the groove portions GR1 and GR2 as in the present embodiment, unevenness is less likely to occur on the upper surface of the second sealing layer SL2. Therefore, it is possible to prevent the generation of bubbles below the optical film 3.

In addition, although the structure in the vicinity of 2nd edge | side S2 was shown in FIG. 11, the same structure is applicable also to the vicinity of 1st edge | side S1, 3rd edge | side S3, and 4th edge | side S4.
There may be only one groove for controlling the shape of the second sealing layer SL2, or three or more. Further, the number of grooves for controlling the shape of the first sealing layer SL1 may be two or more.

[Seventh Embodiment]
A seventh embodiment will be described. Here, mainly focusing on the differences from the first embodiment, the same elements as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
FIG. 12 is a diagram for explaining the seventh embodiment, and shows a schematic cross-sectional view in the vicinity of the second side S2 of the display device 1 as in FIG.

  In FIG. 12, the display device 1 includes a transparent conductive layer TC disposed above the first protrusion P1. Specifically, the transparent conductive layer TC is formed on the second passivation layer PV2. The transparent conductive layer TC can be formed of a material having higher liquid repellency than the layer immediately below, for example, ITO.

  When the transparent conductive layer TC having a high liquid repellency is provided in this way, the sealing layer SL before curing hardly spreads beyond the transparent conductive layer TC. Therefore, the shape of the sealing layer SL can be controlled with higher accuracy.

In addition, although the structure in the vicinity of 2nd edge | side S2 was shown in FIG. 12, the same structure is applicable also to the vicinity of 1st edge | side S1, 3rd edge | side S3, and 4th edge | side S4.
The position where the transparent conductive layer TC is provided is not limited to the example of FIG. For example, the transparent conductive layer TC may be provided between the protrusions P1 and P2, may be provided above the second protrusion P2, or the first protrusion P1 and the sides S1 to S4. Between the two.
Further, the transparent conductive layer TC may be provided in the vicinity of the protrusions P1, P2, P3 shown in FIG. 6 or in the vicinity of the protrusions P1, P2, P100 shown in FIG. Good.

[Eighth Embodiment]
An eighth embodiment will be described. Here, mainly focusing on the differences from the fourth embodiment, the same elements as those in the fourth embodiment are denoted by the same reference numerals, and the description thereof is omitted.
FIG. 13 is a diagram for explaining the eighth embodiment, and shows a schematic cross-sectional view in the vicinity of the second side S2 of the display device 1 as in FIG.

  In FIG. 13, the display device 1 includes a transparent conductive layer TC disposed inside the first groove part GR1. Specifically, the transparent conductive layer TC is formed on the second passivation layer PV2. The transparent conductive layer TC can be formed of a material having higher liquid repellency than the layer immediately below, for example, ITO.

  Also in the configuration of the present embodiment, the sealing layer SL before curing does not easily extend beyond the transparent conductive layer TC as in the seventh embodiment. Therefore, the shape of the sealing layer SL can be controlled with higher accuracy.

Although FIG. 13 shows the configuration in the vicinity of the second side S2, the same configuration can be applied to the vicinity of the first side S1, the third side S3, and the fourth side S4.
The position where the transparent conductive layer TC is provided is not limited to the example of FIG. For example, the transparent conductive layer TC may be provided between the first groove part GR1 and the display area DA, or may be provided between the first groove part GR1 and the sides S1 to S4.
Further, the transparent conductive layer TC may be provided in the vicinity of the groove portions GR1 and GR2 shown in FIG. 10 and in the vicinity of the groove portions GR1, GR2 and GR100 shown in FIG.

  The configurations disclosed in the above embodiments can be appropriately combined. For example, both the protruding portion and the groove portion disclosed in each embodiment may be provided in the vicinity of the end portion of the sealing layer SL, the first sealing layer SL1, or the second sealing layer SL2.

All display devices that can be implemented by a person skilled in the art based on the display device described as the embodiment of the present invention are included in the scope of the present invention as long as they include the gist of the present invention.
In the scope of the idea of the present invention, those skilled in the art can conceive various modifications, and these modifications are also considered to be within the scope of the present invention. For example, those in which the person skilled in the art has appropriately added, deleted, or changed the design of the above-described embodiments, or those in which processes have been added, omitted, or changed conditions are also included in the present invention. As long as the gist is provided, it is included in the scope of the present invention.
Further, regarding other operational effects brought about by the aspects described in the respective embodiments, those that are apparent from the description of the present specification or that can be appropriately conceived by those skilled in the art are naturally understood to be brought about by the present invention. Is done.

  DESCRIPTION OF SYMBOLS 1 ... Display apparatus, 2 ... Display panel, 3 ... Optical film, 4 ... Flexible circuit board, 5 ... Base material, 6 ... Insulating layer, 7 ... Organic resin layer, 31 ... Optical functional layer, 32 ... Adhesive layer, DA ... Display area, SA ... peripheral area, PX ... pixel, P1 ... first protrusion, P2 ... second protrusion, P3 ... third protrusion, P100 ... protrusion, OLED ... organic EL element, AE ... anode electrode, ORG ... organic light emitting layer, CE ... cathode electrode, RF ... reflection layer, SL ... sealing layer, SL1 ... first sealing layer, SL2 ... second sealing layer, B, B1, B2 ... bubbles, PV1 to PV3 ... 1st-3rd passivation layer, GR1 ... 1st groove part, GR2 ... 2nd groove part, GR100 ... groove part, TC ... transparent conductive layer.

Claims (10)

A substrate having a display area and a peripheral area around the display area;
An organic resin layer above the substrate;
A light emitting layer above the organic resin layer in the display region;
A sealing layer covering the light emitting layer;
An optical film pasted above the sealing layer over the display region and the peripheral region,
The organic resin layer has a first protrusion that extends in the peripheral region, and a second protrusion that is positioned between the first protrusion and the display region in plan view,
The second protrusion is located between the base material and the sealing layer in a sectional view,
The optical film overlaps the first protrusion and the second protrusion in plan view.
Display device. The end of the sealing layer is between the first protrusion and the second protrusion in plan view.
The display device according to claim 1. The second protrusion extends in parallel with the first protrusion.
The display device according to claim 1. The distance between the first protrusion and the second protrusion is 50 μm or less.
The display device according to claim 1. The first distance between the top of the first protrusion and the base is smaller than the second distance between the top of the second protrusion and the base.
The display device according to claim 1. The organic resin layer has a plurality of the second protrusions arranged at intervals along the first protrusions,
The plurality of second protrusions are connected to the first protrusion,
The display device according to claim 1. The organic resin layer has a plurality of third protrusions arranged at intervals along the first protrusion,
The plurality of third protrusions are positioned between the plurality of second protrusions and the display region in a plan view, and are positioned between the base material and the sealing layer in a cross-sectional view,
In the extending direction of the first protrusion, the center of each of the plurality of second protrusions and the center of each of the plurality of third protrusions are shifted from each other.
The display device according to claim 6. The interval between the adjacent second protrusions is 50 μm or less.
The display device according to claim 6 or 7. A substrate having a display area and a peripheral area around the display area;
An insulating layer covering the substrate over the display region and the peripheral region;
An organic resin layer above the insulating layer;
A light emitting layer formed above the organic resin layer in the display region;
A sealing layer covering the light emitting layer;
An optical film pasted above the sealing layer over the display region and the peripheral region,
The insulating layer has a first groove extending in the peripheral region;
A part of the sealing layer is inside the first groove,
The optical film overlaps with the first groove part in a plan view.
Display device. The insulating layer further includes a second groove portion extending along the first groove portion in the peripheral region,
The second groove is located between the first groove and the display area in plan view.
The display device according to claim 9.

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