JP2019133868A - Display device - Google Patents

Abstract

To reduce a color displayed by a display device from being perceived as a different color by an observer.SOLUTION: A display device includes a pixel including a light emitting area, a sealing layer that seals the pixel, and a light shielding layer that is provided on the sealing layer and overlaps an area which is a part of the light emitting area. The display device includes a partition wall that defines the light emitting area, and the light shielding layer is overlapped with the partition wall and the area which is the part of the light emitting area. The pixel includes a first electrode provided for each pixel, a second electrode, and a light emitting layer sandwiched between the first electrode and the second electrode, and the partition wall covers an end portion of the first electrode, and the light shielding layer overlaps the end portion.SELECTED DRAWING: Figure 1

Description

  One embodiment of the present invention relates to a display device.

  In a display device exemplified by organic electroluminescence (EL), a microcavity structure may be employed in order to improve luminous efficiency. That is, the peak wavelengths of the colors (for example, R (red), G (green), and B (blue)) displayed by the display device match the optical path length between the anode (anode) and the cathode (cathode). Thus, the thickness of the organic layer is adjusted. Patent Document 1 discloses a technique for improving luminous efficiency while suppressing reflection of external light on the display surface. In this technique, the light shielding layer is disposed so as not to overlap with a partial region in the contact region in the pixel electrode layer. The contact region is a region where the pixel electrode layer and the bank overlap.

JP 2017-54601 A

  By the way, when the display area is observed from an oblique direction, the optical path length of the light emitted from the display area becomes longer than when the display area is observed from the front. For this reason, the color displayed by the display device may be perceived as a different color by the observer depending on the direction in which the display area is observed.

  In view of the above problems, an object of the present invention is to suppress a color displayed by a display device from being perceived as a different color by an observer.

  One embodiment of the present invention is a pixel including a light-emitting region, a sealing layer that seals the pixel, a light-blocking layer that is provided over the sealing layer and overlaps with a partial region of the light-emitting region, It is a display apparatus which has.

  One embodiment of the present invention is a pixel including a first electrode provided for each pixel, a second electrode common to a plurality of pixels, and a light-emitting layer sandwiched between the first electrode and the second electrode; A partition defining a light emitting region of the pixel, and the second electrode has a first thickness portion in the light emitting region, and the first electrode is disposed in the light emitting region and in a region overlapping with the partition. It is a display device having a portion having a second thickness larger than one thickness.

It is a top view which shows the structure of the display apparatus which concerns on 1st Embodiment of this invention. It is sectional drawing of the area | region in which the pixel of the display apparatus which concerns on 1st Embodiment of this invention was provided. It is sectional drawing which shows the structure of the periphery of the light emission area | region of the display apparatus which concerns on 1st Embodiment of this invention. It is the figure which looked at the light shielding layer of the display apparatus which concerns on 1st Embodiment of this invention in the direction perpendicular | vertical to a display area. It is a figure explaining the function of the light shielding layer which concerns on 1st Embodiment of this invention. It is a figure explaining the function of the light shielding layer which concerns on 1st Embodiment of this invention. It is a figure explaining the function of the light shielding layer which concerns on 1st Embodiment of this invention. It is a top view which shows the structure of the display apparatus which concerns on 2nd Embodiment of this invention. It is sectional drawing of the area | region in which the pixel of the display apparatus which concerns on 2nd Embodiment of this invention was provided. It is sectional drawing of the area | region in which the pixel of the display apparatus which concerns on 4th Embodiment of this invention was provided. It is a figure explaining the manufacturing method of the display apparatus which concerns on the 1st-4th embodiment of this invention. It is a figure explaining the manufacturing method of the display apparatus which concerns on the 1st-4th embodiment of this invention. It is sectional drawing of the area | region in which the pixel of the display apparatus which concerns on 5th Embodiment of this invention was provided. It is a figure explaining the manufacturing method of the display apparatus which concerns on 5th Embodiment of this invention. It is a figure explaining the manufacturing method of the display apparatus which concerns on 5th Embodiment of this invention. It is sectional drawing of the area | region in which the pixel of the display apparatus which concerns on one modification of this invention was provided. It is the figure which looked at the light shielding layer of the display apparatus which concerns on one modification of this invention in the direction perpendicular | vertical to a display area. It is the figure which looked at the light shielding layer of the display apparatus which concerns on one modification of this invention in the direction perpendicular | vertical to a display area.

  Embodiments of the present invention will be described below 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 modifications 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 with respect to the width, thickness, shape, and the like of each part in comparison with actual aspects for the sake of clarity of explanation, but are merely examples, and the interpretation of the present invention is not limited. It is not limited.

  In addition, in the present specification and each drawing, elements similar to those described above with reference to the previous drawings are denoted by the same reference numerals, and detailed description may be omitted as appropriate. In addition, the letters “first” and “second” attached to each element are convenient signs used to distinguish each element, and have no meaning unless otherwise specified. .

  Further, in this specification, a certain member or region may be “on (or below)” another member or region. In the case, unless otherwise specified, this includes not only when directly above (or directly below) another member or region, but also above (or below) another member or region, i.e. This includes the case where another component is included above (or below) the region. In the following description, unless otherwise specified, in a cross-sectional view, the side on which the display element is arranged with respect to the substrate is referred to as “upper” or “upper surface”, and the opposite is “lower” or “lower surface”. Will be described.

  In the present specification, “α includes A, B or C”, “α includes any of A, B and C”, “α is one selected from the group consisting of A, B and C”. The expression “including” does not exclude the case where α includes a plurality of combinations of A to C unless otherwise specified. Furthermore, these expressions do not exclude the case where α includes other elements.

[First Embodiment]
FIG. 1 is a top view showing a configuration of a display device 10 according to the first embodiment of the present invention. The display device 10 is an organic EL display device. The display device 10 is a flexible display device that is formed thin as a whole. The display device 10 includes a substrate 110, a display unit 120, a drive circuit 150, and a flexible printed circuit 170.

  The display unit 120, the drive circuit 150, and the flexible printed circuit 170 are provided on the substrate 110. The display unit 120 displays an image (still image or moving image) in the display area 100. The drive circuit 150 is provided in the peripheral area of the display area 100.

  In the display area 100, the display unit 120 includes a plurality of scanning lines 122 extending in the first direction and a plurality of data signal lines 124 extending in the second direction intersecting the first direction. The display unit 120 includes a pair of scanning line driving circuits 126. The pair of scanning line driving circuits 126 are opposed to each other with the display region 100 interposed therebetween. The pair of scanning line driving circuits 126 selects a plurality of scanning lines 122 in a predetermined order and supplies a control signal.

  The drive circuit 150 drives the display unit 120 to control light emission of each of the plurality of pixels 120A. For example, the pixel 120A emits light in any one of red (R), green (G), and blue (B). However, the pixel 120A may emit light with colors other than these. The drive circuit 150 supplies data voltages to the plurality of data signal lines 124 in a predetermined order. The driving circuit 150 may control the scanning line driving circuit 126. The drive circuit 150 includes, for example, an integrated circuit exemplified by an ASIC (Application Specific Integrated Circuit).

  The pixel 120 </ b> A is provided corresponding to each intersection of the plurality of scanning lines 122 and the plurality of data signal lines 124. The plurality of pixels 120A are arranged in an array, for example. The pixel 120A includes a pixel circuit for controlling light emission based on a control signal and a data voltage, and a light emitting element (OLED) whose light emission is controlled by the pixel circuit. The pixel circuit includes, for example, a thin film transistor and a capacitor. The pixel circuit controls the light emission of the light emitting element by driving the thin film transistor by the control signal and the data voltage. The thin film transistor controls light emission of the light emitting element based on a signal from a signal from the driving circuit 150 or the flexible printed circuit 170. Note that FIG. 1 illustrates only a part of each of the plurality of scanning lines 122, the plurality of data signal lines 124, and the plurality of pixels 120A.

  The flexible printed circuit 170 outputs a signal input from an external circuit (not shown) to the display unit 120 (for example, the scanning line driving circuit 126) or the driving circuit 150. The flexible printed circuit 170 has a configuration in which a plurality of wirings are arranged on a flexible substrate.

  FIG. 2 is a cross-sectional view of a region where the pixel 120 </ b> A of the display device 10 is provided. The substrate 110 has plasticity. The substrate 110 may be referred to as a base material, a base film, or a sheet base material. The substrate 110 is, for example, an organic resin substrate. In this case, the organic resin material constituting the substrate 110 is, for example, polyimide, acrylic, epoxy, or polyethylene terephthalate. The thickness of the substrate 110 is, for example, between 10 μm and several hundred μm.

  The transistor 140 is provided over the substrate 110 with the base film 101 interposed therebetween. The transistor 140 includes a semiconductor film 142, a gate insulating film 144, a gate electrode 146, and a source / drain electrode 148. The gate electrode 146 overlaps with the semiconductor film 142 with the gate insulating film 144 interposed therebetween. A channel region 142 a of the semiconductor film 142 is a region overlapping with the gate electrode 146. The semiconductor film 142 includes source / drain regions 142b that sandwich the channel region 142a. An interlayer film 102 is provided on the gate electrode 146. The source / drain electrode 148 is connected to the source / drain region 142 b in the opening provided in the interlayer film 102 and the gate insulating film 144.

  The transistor 140 is a top-gate transistor here, but may be a transistor other than this. The transistor 140 may be, for example, a bottom-gate transistor, a multi-gate transistor having a plurality of gate electrodes 146, or a dual-gate transistor having a structure in which the upper and lower sides of the semiconductor film 142 are sandwiched between two gate electrodes 146.

  A planarization film 114 is provided over the interlayer film 102 and the transistor 140. The upper surface of the planarizing film 114 is flat.

  The light emitting element 160 is provided on the planarization film 114. The light emitting element 160 includes a reflector 161, a first electrode (pixel electrode) 162, an organic layer 164, and a second electrode (counter electrode) 166. The organic layer 164 is a stacked body including the light emitting layer 1644. The first electrode 162 is provided for each pixel 120A. The first electrode 162 is electrically connected to the source / drain electrode 148 through a contact hole (not shown) of the planarization film 114. The second electrode 166 is provided in common for the plurality of pixels 120A. The first electrode 162 and the second electrode 166 are electrodes that transmit light, and are, for example, transparent conductive films such as indium tin oxide (ITO), indium, and tin zinc oxide (IZO). A reflector 161 is provided between the first electrode 162 and the planarization film 114. The reflector 161 reflects light from the light emitting layer 1644 to the observation side. The reflector 161 is made of, for example, an aluminum-based metal or silver, but other materials may be used.

  A partition (bank) 168 defines a light emitting region of the pixel 120A. The partition wall 168 covers the end portion of the first electrode 162. In this embodiment, the light-emitting region is a region where the first electrode 162, the light-emitting layer 1644, and the second electrode 166 overlap and is a region surrounded by the partition 168. Further, the partition wall 168 prevents the light emitting layer 1644 and the second electrode 166 from being disconnected. For example, polyimide is used for the partition 168, but other materials may be used.

  The light emitting layer 1644 overlaps with the first electrode 162 and the partition 168. Here, the light-emitting layer 1644 is manufactured using a low molecular weight or high molecular weight organic EL material. The light emitting layer 1644 employs, for example, an R, G, or B coating method. The light emitting layer 1644 is sandwiched between the first electrode 162 and the second electrode 166. The light emitting layer 1644 emits light according to the voltage supplied to the first electrode 162 and the second electrode 166. Specifically, carriers are injected from the first electrode 162 and the second electrode 166 into the light emitting layer 1644. Within the light-emitting layer 1644, carriers recombine. The light-emitting layer 1644 emits light through a process in which a light-emitting molecule is in an excited state and the excited state is relaxed to a ground state. That is, the light emitting element 160 is an organic EL element.

  The sealing layer 180 is provided on the light emitting element 160. The upper surface of the sealing layer 180 is flat. The sealing layer 180 prevents impurities (water, oxygen, and the like) from entering the light-emitting element 160 and the transistor 140 from the outside. The sealing layer 180 is a layer containing an inorganic compound. The sealing layer 180 includes, for example, an inorganic insulating material exemplified by a silicon nitride film and an aluminum oxide film. The sealing layer 180 may include an organic film. The organic film is provided between the first inorganic film and the second inorganic film, for example, and includes an organic resin including, for example, an acrylic resin, polysiloxane, polyimide, polyester, or the like.

  A light shielding layer 190 is provided on the sealing layer 180. The light shielding layer 190 overlaps with a partial region of the light emitting region of the pixel 120A. The light shielding layer 190 further overlaps with the partition wall 168. The light blocking layer 190 blocks all or a part of light incident from at least the sealing layer 180 side (that is, the side opposite to the observation side). The light shielding layer 190 may be formed of a light absorbing member or a reflective member. The light shielding layer 190 is made of, for example, a resin material colored in black or a light shielding metal material such as chromium (Cr). In the case where the light shielding layer 190 blocks a part of the incident light, for example, it is desirable that the transmittance is not more than 0.00 (or the absorption rate is not less than ΔΔ).

  FIG. 3 is a cross-sectional view showing a detailed configuration around the light emitting region 160A of the pixel 120A. In FIG. 3, the partition 168 positioned on one side when viewed from the light emitting element 160 is referred to as “partition 168A”, and the partition 168 positioned on the other side is referred to as “partition 168B”. FIG. 4 shows a view in which the light shielding layer 190 is viewed in a direction perpendicular to the display region 100.

  The organic layer 164 is a stacked body of a hole injection layer 1640, a hole transport 1642, a light emitting layer 1644, an electron transport layer 1646, and an electron injection layer 1648. The light-emitting region 160A of the light-emitting element 160 is a region where the first electrode 162, the light-emitting layer 1644, and the second electrode 166 overlap, and is a region surrounded by the partition 168A and the partition 168B. The region overlapping the first end 1622 of the first electrode 162 covered by the partition 168A and the region overlapping the second end 1626 of the first electrode 162 covered by the partition 168B are included in the light emitting region 160A. I can't.

  The light shielding layer 190 includes a first portion 192, a second portion 194, and a third portion 196. The first portion 192 overlaps with the inclined portion 1682A of the partition 168A. The inclined portion 1682A covers the first end portion 1622 of the first electrode 162, and the upper surface thereof gradually decreases in a direction approaching the light emitting region 160A. The first portion 192 further overlaps the first region 1624 adjacent to the first end portion 1622. The first region 1624 is a partial region of the light emitting region 160A. The second portion 194 overlaps with the inclined portion 1682B of the partition 168B. The inclined portion 1682B covers the second end portion 1626 of the first electrode 162, and the upper surface thereof gradually decreases in a direction approaching the light emitting region 160A. The second portion 194 further overlaps the second region 1628 adjacent to the second end 1626. The second region 1628 is a partial region of the light emitting region 160A.

  The region T is a part of the light emitting region 160A, and the first portion 192 and the second portion 194 are not provided. The region T is a region that overlaps the third region 1620 of the first electrode 162. The third region 1620 is a region between the first region 1624 and the second region 1628. The third portion 196 is provided in a part of the region T. As shown in FIG. 4, the third portion 196 is not connected to the first portion 192 and the second portion 194, and is surrounded by the light emitting region 160A (region T) when viewed in the direction perpendicular to the display region 100. ing. For example, the third portion 196 overlaps the center of the light emitting region 160A, but may not overlap the center of the light emitting region 160A.

  The operation of the light shielding layer 190 will be described. FIG. 5 shows a configuration in which the light shielding layer 190 is removed from the portion shown in FIG. With the microcavity structure, the light directly reaching the observer from the light emitting layer 1644 interferes with the light reflected between the second electrode 166 and the reflector 161, so that the light emission efficiency is improved. Usually, the thickness of the organic layer 164 is adjusted so that the light emission efficiency of the lights L1A and L2A traveling in the front direction is maximized. However, in the case shown in FIG. 5, when viewed from an oblique direction with respect to the display region 100, light L1B and L2B having an optical path length longer than that of the light L1A and L2A are observed. As a result, the original color component is reduced for each of the R, G, and B colors, and the color component on the longer wavelength side is emphasized. As a result, the color displayed by the display device 10 is perceived as a different color by the observer.

  Here, as shown in FIG. 6, a case is considered where each of the plurality of pixels 120A-1, 120A-2, 120-3 displays the same B (blue) and the display device 10 is bent. In this case, an observer in front of the display device 10 perceives B (blue) light emission for the central pixel 120A-1. However, the pixel 120A-2 located closer to the end than the pixel 120A-1 is perceived as a color closer to G due to the large optical path length. The pixel 120A-3 located closer to the end than the pixel 120A-2 is observed as being closer to R.

  In FIG. 5, the organic layer 164 may be thin in the vicinity of the partition wall 168, specifically, along the upper surfaces of the inclined portions 1682A and 1682B, due to the manufacturing process. For example, light L3 in an oblique direction that passes through a portion of the organic layer 164 that overlaps the inclined portion 1862A also causes the color displayed by the display device 10 to be perceived as another color by the observer. Furthermore, the light L4 leaked from the light emitting area 160A to the outside of the light emitting area 160A may be observed. Although not shown in FIG. 5, light similar to the light L3 and L4 propagates also in a portion of the organic layer 164 that overlaps with the inclined portion 1862B.

  In order to solve the above problem, the display device 10 includes a light shielding layer 190. In the example of FIG. 7, the second portion 194 of the light shielding layer 190 blocks light L1B and L2B traveling in an oblique direction with respect to the display region 100. Although not shown, the first portion 192 also blocks light traveling in an oblique direction with respect to the display region 100. Further, the light L3 in the oblique direction that passes through the portion of the organic layer 164 that overlaps the inclined portion 1862A is blocked by the third portion 196. As a result, light traveling in an oblique direction is hardly observed. As a result, it is possible to suppress the color displayed by the display device 10 from being perceived as a different color by the observer. Further, the light L4 is blocked by the first portion 192, and the light L4 is not observed. Note that the third portion 196 and the second portion 194 also block light similar to the light L3 and L4 that passes through the portion of the organic layer 164 that overlaps the inclined portion 1862B. On the other hand, the lights L1A and L2A are emitted in the front direction from a region where the light shielding layer 190 is not provided. The observer can perceive the color displayed on the display device 10 by the lights L1A and L1B.

  The light shielding layer 190 is provided on the sealing layer 180. The sealing layer 180 is usually thicker than each layer of the organic layer 164 and the insulating layer on the substrate 110. Therefore, a sufficient distance between the light shielding layer 190 and the partition 168 or the light emitting region 160A is secured. Therefore, the light shielding layer 190 can block light in an oblique direction more efficiently than the case where the light shielding layer 190 is disposed below the sealing layer 180.

[Second Embodiment]
The display device 10 </ b> A of the present embodiment includes a light shielding layer 190 </ b> A including a metal layer instead of the light shielding layer 190. Here, the light shielding layer 190A is a metal layer on which a so-called on-cell touch sensor is formed. The on-cell method is a method in which a touch sensor is incorporated in a display device.

  FIG. 8 is a top view showing the configuration of the display device 10A. As shown in FIG. 8, the light shielding layer 190A includes light shielding layers 190X and 190Y. The light shielding layers 190X and 190Y have a quadrangular shape having a mesh pattern. The light shielding layers 190X and 190Y include, for example, molybdenum (Mo), niobium (Nb), aluminum (Al), gold (Au), silver (Ag), copper (Cu), palladium (Pd), tungsten (W), or titanium. It is formed using a metal material exemplified by (Ti).

  The cross-sectional configuration around the light emitting region 160A of the light shielding layer 190A may be the same as the cross sectional configuration around the light emitting region 160A of the light shielding layer 190 of the first embodiment described above. Therefore, the description is omitted.

  The light shielding layers 190X and 190Y are used as sensor electrodes in the touch sensor 20. In this case, the touch sensor 20 is a mutual capacitive touch sensor. The light shielding layers 190X and 190Y are electrically connected to the drive circuit 150. The plurality of light shielding layers 190X arranged in the first direction, which is the short side direction of the display region 100, are electrically connected to each other. The plurality of light shielding layers 190Y arranged in the second direction which is the long side direction of the display region 100 are electrically connected to each other. The light shielding layer 190 </ b> X is a transmission electrode in the touch sensor 20. The light shielding layer 190Y is a receiving electrode in the touch sensor 20. Instead, the light shielding layer 190Y may be a transmission electrode in the touch sensor 20, and the light shielding layer 190X may be a reception electrode in the touch sensor 20.

  The drive circuit 150 supplies a voltage to the light shielding layer 190X. An electric field corresponding to the supplied voltage is generated between the light shielding layer 190X and the light shielding layer 190Y. For example, when a human finger touches the display device 10A, the electric field between the light shielding layer 190X and the light shielding layer 190Y changes. Thereby, the drive circuit 150 receives an input of a signal from the light shielding layer 190Y. Based on this signal, display device 10A detects a position touched by a human finger.

  The light shielding layer 190A described above functions as the touch sensor 20 and can suppress the color displayed by the display device 10A from being perceived as a different color by the observer. Instead, the light shielding layer 190 </ b> A may not be used as the touch sensor 20. In this case, the light shielding layer 190A may not be electrically connected to the drive circuit 150.

  As shown in FIG. 9, the light shielding layer 190A may be divided into more parts than in the first embodiment described above. In this example, the portion of the light shielding layer 190A that overlaps the partition wall 168 is divided into a first portion 198A and a second portion 198B. Thereby, the effect of improving the detection accuracy of the touch sensor 20 can be expected without reducing the amount of light transmitted to the outside of the display device 10.

[Third Embodiment]
In the first embodiment described above, the light shielding layer 190 may be formed using a coating material having a light shielding property. The coating material has, for example, absorbance in the visible region. In this case, the light shielding layer 190 is formed by an inkjet method. The coating material having a light shielding property is a coating material in which a light absorbing material such as porous silicon / porous carbon, metal powder, or pigment is dispersed.

[Fourth Embodiment]
The display device 10 may have the circularly polarizing plate 200 on the sealing layer 180. The circularly polarizing plate 200 suppresses reflection caused by the light shielding layer 190 reflecting external light. The circularly polarizing plate 200 is desirably formed when the light shielding layer 190 is formed of a reflective member such as metal.

  FIG. 10 is a cross-sectional view of a region where the pixel 120 </ b> A of the display device 10 is provided. As shown in FIG. 10, the insulating layer 195 is provided on the light shielding layer 190. Here, the upper surface of the insulating layer 195 is flat. The insulating layer 195 includes, for example, an inorganic compound. A circularly polarizing plate 200 is provided on the insulating layer 195. The circularly polarizing plate 200 is a film-like circularly polarizing plate, for example.

[Manufacturing method of display device]
A method for manufacturing the display device of the first to fourth embodiments described above will be described. First, as shown in FIG. 11, a plurality of pixels 120 </ b> A are formed on the substrate 110. Next, as illustrated in FIG. 12, a sealing layer 180 that seals the plurality of pixels 120A is formed. The sealing layer 180 is formed using, for example, a sputtering method or a CVD method. Next, the light shielding layer 190 is formed on the sealing layer 180. In the case of the first, second, and fourth embodiments described above, the light shielding layer 190 is formed by, for example, a sputtering method or a CVD method. In the case of the third embodiment described above, the light shielding layer 190 is formed by an inkjet method. In the display device manufacturing method of the fourth embodiment, the insulating layer 195 and the circularly polarizing plate 200 are further formed on the sealing layer 180.

[Fifth Embodiment]
The display device of this embodiment is different from the first embodiment described above in that it does not have the light shielding layer 190 and has the second electrode 166A instead of the second electrode 166. The second electrode 166 </ b> A blocks light traveling in an oblique direction instead of the light blocking layer 190.

  FIG. 13 is a cross-sectional view showing a configuration around the light emitting region 160A. The second electrode 166A includes a first portion 1662, a second portion 1664A, a third portion 1664B, and a fourth portion 1664C. The first portion 1662 is a portion having a thickness t1 (first thickness) provided on the upper surface of the organic layer 164 (electron injection layer 1648). The first portion 1662 is provided in a region outside the light emitting region 160A and outside the light emitting region 160A. The second portion 1664A, the third portion 1664B, and the fourth portion 1664C are provided on the upper surface of the first portion 1662, respectively. Specifically, the second portion 1664A overlaps with the partition 168A. Further, the second portion 1664A overlaps the end portion of the first electrode 162 covered with the partition 168A and the region adjacent to the end portion of the first electrode 162 in the light emitting region 160A. The third portion 1664B overlaps with the partition 168B. The third portion 1664B further overlaps with an end portion of the first electrode 162 covered with the partition 168B and a region adjacent to the end portion of the first electrode 162 in the light emitting region 160A. The fourth portion 1664C overlaps with the first electrode 162 in the light emitting region 160A. The positions of the end portions of the second portion 1664A and the third portion 1664B shown in FIG. 13 in the light emitting region 160A are examples, and may be closer to the end portions of the light emitting region 160A, for example. The fourth portion 1664C is not connected to the second portion 1664A and the third portion 1664B, and is surrounded by the light emitting region 160A when viewed from the direction perpendicular to the display region 100. Note that the first portion 1662, the second portion 1664A, the third portion 1664B, and the fourth portion 1664C may be formed of a single member, or at least a part thereof may be formed of another member. Also good.

  Of the second electrode 166A, the thickness of the portion where the second portion 1664A, the third portion 1664B, and the fourth portion 1664C are provided is t2 (second thickness). That is, the relationship t2> t1 is satisfied. Further, in the second electrode 166A, the portion where the second portion 1664A, the third portion 1664B, and the fourth portion 1664C are provided has a higher light shielding property than the other portions. Therefore, it is possible to suppress the color displayed by the display device 10 from being perceived as a different color by the observer by the same operation as in the first embodiment described above. Furthermore, since the second electrode 166A has a thicker portion than the second electrode 166, the second electrode 166 is more advantageous in reducing the electrical resistance than the second electrode 166.

[Manufacturing method of display device]
A method for manufacturing the display device according to the fifth embodiment will be described. First, as shown in FIG. 14, the first electrode 162, the partition walls 168 </ b> A and 168 </ b> B, the organic layer 164, and the first portion 1662 are sequentially formed on the planarization film 114. The first electrode 162 and the first portion 1662 are formed using, for example, a sputtering method. The partition walls 168A and 168B are formed by, for example, a spin coating method. The organic layer 164 is formed by, for example, a vacuum deposition method, a printing method, a spin coating method, or the like.

  Next, in the upper surface of the first portion 1662, a second portion 1664A is formed in a region overlapping with the partition 168A, a third portion 1664B is formed in a region overlapping with the partition 168B, and a fourth portion 1664C is formed in the light emitting region 160A. The The second portion 1664, the third portion 1664B, and the fourth portion 1664C may be formed in the same manner as the first electrode 162 and the first portion 1662. Thereby, the second electrode 166A shown in FIG. 15 is completed. Next, when the sealing layer 180 that seals the plurality of pixels 120A is formed, the display device illustrated in FIG. 13 is completed. The sealing layer 180 is formed by, for example, a sputtering method or a CVD method.

[Modification]
The above-described embodiments can be applied by being combined or replaced with each other. In the above-described embodiment, the present invention can be modified as follows.

  As shown in FIG. 16, the light shielding layer 190 may not have the third portion 196 surrounded by the light emitting region 160A. Also in this case, the first portion 192 and the second portion 194 block light that causes the color displayed by the display device 10 to be perceived as a different color by the observer. A similar configuration can be adopted in the second to fourth embodiments described above. For the same purpose, the second electrode 166A of the fifth embodiment described above may not include the fourth portion 1664C.

  In the embodiment described above, the third portion 196 and the fourth portion 1664C are surrounded by the light emitting region 160A when viewed from the direction perpendicular to the display region 100, but the light emitting region 160A is adjacent to at least a part of the directions. It does not have to be.

  In the first to fourth embodiments described above, the arrangement relationship between the light emitting region 160A and the light shielding layer 190 or the light shielding layer 190A (hereinafter collectively referred to as “light shielding layer 190”) may not be common to all the pixels 120A. Good. For example, in the first pixel 120A and the second pixel 120A closer to the end of the display region 100 than the first pixel 120A, the second pixel 120A is lighter than the first pixel 120A. Of these, the area of the region overlapping the light emitting region 160A may be large. This is because light traveling in an oblique direction is more easily observed in the pixel 120 </ b> A closer to the end of the display region 100. The second pixel 120A may be provided with a light shielding layer 190 at a position closer to the end of the light emitting region 160A than the first pixel 120A. Various modifications can be similarly applied to the arrangement relationship between the light emitting region 160A and the thickness t2 portion of the second electrode 166A in the fifth embodiment.

  The edge part covered with the light shielding layer 190 in the light emitting region 160A is not limited to the edge part described in the above-described embodiment. For example, as shown in FIG. 17, all end portions of the light emitting region 160 </ b> A may be covered with the light shielding layer 190. The light shielding layer 190 may include two or more portions surrounded by the light emitting region 160A per pixel. For example, as shown in FIG. 18, the light shielding layer 190 may include third portions 196A, 196B, 196C, and 196D each surrounded by the light emitting region 160A. In addition, all the end portions of the light emitting region 160A may not be covered with the light shielding layer 190.

  In the light shielding layer 190, the first layer provided on the upper surface of the sealing layer 180 may be formed of a reflective material, and the second layer on the first layer may be formed of a light absorbing member. In this case, the first layer reflects light incident from the sealing layer 180 side. At least a part of the reflected light is reflected by the reflector 161 and travels to the observation side. Therefore, according to the present configuration, reflection from the reflection of external light by the light shielding layer 190 is suppressed while increasing the light emission efficiency of the light emitting element 160.

  The display device of the present invention is not limited to a separate display device. The display device of the present invention may be, for example, a display device that configures R, G, and B pixels using a white light source and a color filter. The specific configuration of the display device does not matter.

  In the embodiment described above, the case of an organic EL display device has been illustrated as a disclosed example, but other application examples include a liquid crystal display device and other self-luminous display devices.

  It should be noted that various changes and modifications can be conceived by those skilled in the art within the scope of the idea of the present invention, and it is understood that these changes and modifications are also 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 the subject matter of the present invention As long as it is provided, it is included in the scope of the present invention.

10, 10A: Display device, 20: Touch sensor, 90: Display device, 100: Display region, 101: Base film, 102: Interlayer film, 110: Substrate, 114: Planarization film, 120: Display unit, 120A: Pixel 122: scanning line, 124: data signal line, 126: scanning line driving circuit, 140: transistor, 142: semiconductor film, 144: gate insulating film, 146: gate electrode, 148: drain electrode, 150: driving circuit, 160 : Light emitting element, 160A: light emitting region, 161: reflector, 162: first electrode, 164: organic layer, 166: second electrode, 166A: second electrode, 168, 168A, 168B: partition, 170: flexible printed circuit, 180: sealing layer, 190, 190A, 190X, 190Y: light shielding layer, 192: first part, 194: second part, 195: insulation 196, 196A, 196B, 196C, 196D: third portion, 200: circularly polarizing plate, 1620: third region, 1622: first end, 1624: first region, 1626: second end, 1628: first 2 regions, 1640: hole injection layer, 1642: hole transport, 1644: light emitting layer, 1646: electron transport layer, 1648: electron injection layer, 1662: first part, 1664A: second part, 1664B: third part, 1664C : 4th part, 1682, 1682A, 1682B: Inclined part

Claims (13)

A pixel including a light emitting area;
A sealing layer for sealing the pixels;
A light shielding layer provided on the sealing layer and overlapping a part of the light emitting region;
A display device. Having a partition wall defining the light emitting region;
The display device according to claim 1, wherein the light shielding layer overlaps with the partition and a partial region of the light emitting region. The pixel includes a first electrode provided for each pixel, a second electrode, and a light emitting layer sandwiched between the first electrode and the second electrode,
The partition wall covers an end of the first electrode,
The display device according to claim 2, wherein the light shielding layer overlaps the end portion. The display device according to claim 3, wherein the light shielding layer overlaps the end portion of the first electrode and a region adjacent to the end portion. The partition wall covers a first end of the first electrode and a second end facing the first end,
The light shielding layer covers the first end portion, the first region adjacent to the first end portion, the second end portion, and the second region adjacent to the second end portion of the first electrode. The display device according to claim 4. The display device according to claim 1, wherein the light shielding layer includes a portion surrounded by the light emitting region when viewed from a direction perpendicular to the display region in which the pixels are arranged. The display device according to claim 1, wherein the light shielding layer includes a metal layer. The display device according to claim 7, wherein the metal layer includes a sensor electrode. The display device according to claim 7, further comprising a polarizing plate provided on the metal layer. The display device according to claim 1, wherein a coating material having a light shielding property is used for the light shielding layer. The display device according to claim 1, wherein the pixel, the sealing layer, and the light shielding layer are formed on a flexible substrate. A pixel including a first electrode provided for each pixel, a second electrode common to a plurality of pixels, and a light emitting layer sandwiched between the first electrode and the second electrode;
A partition wall defining a light emitting region of the pixel;
Have
The second electrode has a first thickness portion in the light emitting region, and has a second thickness portion larger than the first thickness in the light emitting region and a region overlapping the partition. apparatus. The display device according to claim 12, wherein the second thickness portion includes a portion surrounded by the light emitting region when viewed from a direction perpendicular to the display region in which the pixels are arranged.

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