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WO2018139426A1 - Dispositif électroluminescent - Google Patents

Dispositif électroluminescent Download PDF

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Publication number
WO2018139426A1
WO2018139426A1 PCT/JP2018/001896 JP2018001896W WO2018139426A1 WO 2018139426 A1 WO2018139426 A1 WO 2018139426A1 JP 2018001896 W JP2018001896 W JP 2018001896W WO 2018139426 A1 WO2018139426 A1 WO 2018139426A1
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WIPO (PCT)
Prior art keywords
light emitting
electrode
conductive layer
light
emitting device
Prior art date
Application number
PCT/JP2018/001896
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English (en)
Japanese (ja)
Inventor
吉田　綾子
健見 岡田
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パイオニア株式会社
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Publication of WO2018139426A1 publication Critical patent/WO2018139426A1/fr

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/02—Details
    • H05B33/06—Electrode terminals
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • H05B33/26—Light sources with substantially two-dimensional radiating surfaces characterised by the composition or arrangement of the conductive material used as an electrode

Definitions

  • the present invention relates to a light emitting device.
  • Patent Document 1 describes an example of a translucent OLED.
  • the OLED includes a first electrode, an organic layer, and a plurality of second electrodes.
  • the first electrode and the organic layer are sequentially stacked on the substrate.
  • the plurality of second electrodes are arranged in stripes on the organic layer. Light from the outside of the OLED can pass through the region between the adjacent second electrodes. Thereby, OLED has translucency.
  • the translucent OLED has two surfaces facing away from each other.
  • the light emitting region of the OLED is located on one of these two surfaces, and the light output from the light emitting region is mainly output from the other surface (light emitting surface) of these two surfaces. It has become so.
  • the present inventor has found that a part of the light output from the light emitting region may leak to the opposite side of the light emitting surface. Based on this finding, the present inventor has studied to suppress the amount of light leaking along the longitudinal direction of the light emitting region.
  • An example of a problem to be solved by the present invention is to suppress the amount of light leaking along the longitudinal direction of the light emitting region to the opposite side of the light emitting surface of the light emitting device.
  • the first light emitting unit and the second light emitting unit extend in a second direction intersecting the first direction between the first light emitting unit and the second light emitting unit arranged along the first direction among the plurality of light emitting units.
  • a first conductive layer having the same potential as the first electrode of each of the light emitting units; It is a light-emitting device provided with.
  • FIG. 2 is a cross-sectional view taken along the line AA in FIG.
  • FIG. 3 is a cross-sectional view taken along the line BB in FIG.
  • FIG. 1 is a plan view showing a light emitting device according to Example 1.
  • FIG. 8 is a sectional view taken along the line PP in FIG. 7. It is QQ sectional drawing of FIG.
  • FIG. 6 is a plan view showing a light emitting device according to Example 2.
  • FIG. FIG. 12 is a sectional view taken along the line PP in FIG. 11.
  • 6 is a plan view showing a light emitting device according to Example 3.
  • FIG. It is the figure which removed the 2nd electrode and the insulating layer from FIG. It is QQ sectional drawing of FIG.
  • FIG. 1 is a plan view showing a light emitting device 10 according to the embodiment.
  • FIG. 2 is a cross-sectional view taken along the line AA in FIG. 3 is a cross-sectional view taken along the line BB of FIG. 1 to 3, the X direction is defined as the longitudinal direction of the light emitting unit 152, and the Y direction is defined as the direction intersecting the X direction, specifically, the direction orthogonal to the X direction.
  • the X direction is defined as the longitudinal direction of the light emitting unit 152
  • the Y direction is defined as the direction intersecting the X direction, specifically, the direction orthogonal to the X direction.
  • the light emitting device 10 includes a substrate 100 and a light emitting region 150. As shown in FIGS. 2 and 3, the substrate 100 has a first surface 102 and a second surface 104. As shown in FIG. 1, the light emitting region 150 includes a plurality of light emitting units 152. In the example illustrated in FIG. 1, the plurality of light emitting units 152 are arranged in a matrix along the X direction and the Y direction. As shown in FIGS. 2 and 3, each light emitting unit 152 is located on the first surface 102 side of the substrate 100 and has a laminated structure including the first electrode 110, the organic layer 120, and the second electrode 130. Yes.
  • each light emitting unit 152 has a longitudinal direction in the first direction (X direction) and a short direction in the second direction (Y direction).
  • each light emitting unit 152 has a rectangular shape having a long side along the X direction and a short side along the Y direction.
  • the shape of the light emitting unit 152 may be a shape other than a rectangle.
  • the light emitting unit 152 has a longitudinal direction in the X direction.
  • the light emitted from the light emitting unit 152 is reflected by the second surface 104 of the substrate 100 and extends along the longitudinal direction (X direction) of the light emitting unit 152.
  • Even from the second surface 104 toward the first surface 102, much of this light can be blocked by the second electrode 130. For this reason, the amount of light leaking along the longitudinal direction (X direction) of the light emitting unit 152 to the opposite side of the light emitting surface (second surface 104) of the light emitting device 10 can be suppressed.
  • the light emitting region 150 includes a plurality of light emitting units 152 arranged in the X direction (for example, the first light emitting unit 152 (1), the second light emitting unit 152 (2), and the third light emitting unit in the drawing. Part 152 (3)).
  • the light emitting units 152 adjacent along the X direction are supplied with a potential from a common conductive layer extending between the light emitting units 152 along the Y direction.
  • the first electrode 110 of the first light emitting unit 152 (1) and the first electrode 110 of the second light emitting unit 152 (2) are located between the first light emitting unit 152 (1) and the second light emitting unit 152 (2).
  • the first electrode 110 of the first light emitting unit 152 (1) and the first electrode 110 of the second light emitting unit 152 (2) are at the same potential as the first conductive layer (conductive layer 212).
  • the second electrode 130 of the second light emitting unit 152 (2) and the second electrode 130 of the third light emitting unit 152 (3) are disposed between the second light emitting unit 152 (2) and the third light emitting unit 152 (3).
  • the second electrode 130 of the second light emitting unit 152 (2) and the second electrode 130 of the third light emitting unit 152 (3) are at the same potential as the second conductive layer (conductive layer 222).
  • the luminance distribution of the light emitting region 150 has high uniformity along the longitudinal direction (X) direction of the light emitting region 150.
  • the light emitting region 150 includes a plurality of light emitting units 152 arranged along the X direction, and the light emitting units 152 adjacent along the X direction extend along the Y direction between the light emitting units 152.
  • a potential is supplied from a common conductive layer that extends.
  • it is possible to suppress a voltage drop that may occur due to the light emitting unit 152 being too long along the X direction, and thereby it is possible to suppress nonuniform brightness in the X direction of the light emitting region 150. It becomes. For this reason, the luminance distribution of the light emitting region 150 has high uniformity along the longitudinal direction (X) direction of the light emitting region 150.
  • the pitch of the plurality of light emitting units 152 arranged along the longitudinal direction (X direction) of the light emitting region 150 it is possible to reduce the pitch of the plurality of light emitting units 152 arranged along the longitudinal direction (X direction) of the light emitting region 150.
  • the light emitting units 152 adjacent along the X direction are supplied with a potential from a common conductive layer extending along the Y direction between the light emitting units 152. Therefore, the space for providing this conductive layer can be reduced. For this reason, it is possible to narrow the pitch of the plurality of light emitting units 152 arranged along the longitudinal direction (X direction) of the light emitting region 150.
  • the light emitting device 10 includes a substrate 100, a light emitting region 150, a first tab line 210, a plurality of conductive layers 212, a second tab line 220, and a plurality of conductive layers 222.
  • the shape of the substrate 100 is a rectangle having a pair of long sides and a pair of short sides.
  • the long side of the substrate 100 is along the X direction
  • the short side of the substrate 100 is along the Y direction.
  • the shape of the substrate 100 is not limited to a rectangle.
  • the shape of the substrate 100 may be, for example, a circle or a polygon other than a rectangle.
  • the first tab line 210 and the second tab line 220 extend in the X direction, and particularly in the example shown in FIG. 1, extend along one and the other of the pair of long sides of the substrate 100. .
  • the first tab line 210 and the second tab line 220 are TAB (Tape Automated Bonding) tape containing copper.
  • the first tab line 210 and the second tab line 220 may be silver paste.
  • the first tab wire 210 and the second tab wire 220 may be MAM (Mo / Al / Mo), Al, Ag, TiAl, Al alloy, or Ag alloy.
  • the plurality of conductive layers 212 and the plurality of conductive layers 222 are connected to the first tab line 210 and the second tab line 220, respectively.
  • the plurality of conductive layers 212 and the plurality of conductive layers 222 extend in the Y direction. More specifically, the plurality of conductive layers 212 extend from the first tab line 210 toward the second tab line 220, and the conductive layer 222 extends from the second tab line 220 to the first tab line 210. It extends towards.
  • the plurality of conductive layers 212 and the plurality of conductive layers 222 are alternately arranged along the X direction.
  • the light emitting region 150 includes a plurality of light emitting units 152 arranged in a matrix along the X direction and the Y direction.
  • the plurality of light emitting units 152 can be classified into a plurality of groups G, and each group G includes a plurality of light emitting units 152 arranged in the Y direction.
  • the plurality of light emitting portions 152 in each group G are located between the adjacent conductive layers 212 and 222, and are electrically connected in parallel between the adjacent conductive layers 212 and 222.
  • the first electrode 110 and the second electrode 130 of each light emitting unit 152 in each group G are electrically connected to the conductive layer 212 and the conductive layer 222, respectively.
  • the first light emitting unit 152 (1) and the fourth light emitting unit 152 (4) are arranged along the Y direction, and each of the first light emitting unit 152 (1) and the fourth light emitting unit 152 (4) is arranged.
  • the first electrode 110 and the second electrode 130 are electrically connected to the conductive layer 212 and the conductive layer 222. Therefore, the first electrode 110 of each light emitting unit 152 in each group G can be supplied with a potential via the first tab wire 210 and the conductive layer 212, and the first electrode of each light emitting unit 152 in each group G can be supplied.
  • the two electrodes 130 can be supplied with a potential through the second tab wire 220 and the conductive layer 222.
  • the light emitting device 10 includes a substrate 100 and a plurality of light emitting elements 140.
  • the substrate 100 has a first surface 102 and a second surface 104.
  • the plurality of light emitting elements 140 are located on the first surface 102 of the substrate 100.
  • Each light emitting element 140 includes a first electrode 110, an organic layer 120, and a second electrode 130 in order from the first surface 102 of the substrate 100.
  • the second surface 104 is on the opposite side of the first surface 102.
  • the substrate 100 has translucency.
  • the substrate 100 includes glass.
  • the substrate 100 may include a resin.
  • the first electrode 110 has translucency and conductivity.
  • the first electrode 110 includes a material having translucency and conductivity, and an inorganic material, for example, a metal oxide, specifically, for example, ITO (Indium Tin Oxide) and IZO (Indium Zinc Oxide). At least one selected from the group consisting of: For this reason, the light from the organic layer 120 can pass through the first electrode 110.
  • the organic layer 120 includes a hole injection layer (HIL), a hole transport layer (HTL), a light emitting layer (EML), an electron transport layer (ETL), and an electron injection layer (EIL).
  • HIL hole injection layer
  • HTL hole transport layer
  • EML light emitting layer
  • ETL electron transport layer
  • EIL electron injection layer
  • the EML can emit light by organic electroluminescence.
  • holes injected from the first electrode 110 via the HIL and HTL and injected from the second electrode 130 via the EIL and ETL. Light can be emitted by recombination of electrons.
  • the second electrode 130 has a light shielding property, more specifically, a light reflecting property, and further has conductivity.
  • the second electrode 130 includes a material having light reflectivity and conductivity, and includes, for example, a metal, specifically, for example, at least one of Al, Ag, and MgAg. For this reason, the light from the organic layer 120 is reflected by the second electrode 130 with hardly passing through the second electrode 130.
  • the light emitting device 10 includes a plurality of light emitting units 152 and a plurality of light transmitting units 154.
  • each of the plurality of light emitting elements 140 functions as each of the plurality of light emitting units 152.
  • Each of the plurality of light transmitting portions 154 is located between the adjacent light emitting portions 152 and does not overlap the light shielding member, specifically, the second electrode 130.
  • the plurality of light emitting units 152 and the plurality of light transmitting units 154 are alternately arranged along the Y direction.
  • the light emitting device 10 functions as a semi-transmissive OLED by a plurality of light emitting units 152 and a plurality of light transmitting units 154.
  • a semi-transmissive OLED by a plurality of light emitting units 152 and a plurality of light transmitting units 154.
  • an object on the first surface 102 side can be seen through the second surface 104 side by the plurality of light transmitting units 154 and the second surface 104 side. Can be seen through from the first surface 102 side.
  • light from the plurality of light emitting units 152 is mainly output from the second surface 104 side, and is hardly output from the first surface 102 side.
  • an object on the second surface 104 side can be seen through the first surface 102 side by the plurality of light transmitting units 154 in human vision.
  • FIG. 4 is a diagram for explaining an example of the operation of the light emitting device 10 shown in FIGS. 1 to 3, and corresponds to FIG.
  • the light emitted from the light emitting unit 152 is incident on the first surface 102 of the substrate 100 and passes through the substrate 100.
  • the light passes through the substrate 100 along the longitudinal direction (X direction) of the light emitting unit 152. Due to Fresnel reflection, a part of this light is reflected by the second surface 104 of the substrate 100, and another part of this light is emitted from the second surface 104 of the substrate 100.
  • the light reflected by the second surface 104 of the substrate 100 can be light that leaks to the opposite side of the light emitting surface (second surface 104) of the light emitting device 10.
  • second surface 104 the opposite side of the light emitting surface
  • the second electrode 130 extends along the longitudinal direction (X) direction of the light emitting unit 152, and the light reflected by the second surface 104 of the substrate 100 is reflected by the second electrode 130. Can be blocked. For this reason, the amount of light leaking along the longitudinal direction (X direction) of the light emitting unit 152 to the opposite side of the light emitting surface (second surface 104) of the light emitting device 10 can be suppressed.
  • FIG. 5 is a diagram showing the light emitting system 20 according to the present embodiment.
  • the light emitting system 20 includes the light emitting device 10 and the first position P1.
  • the light emitting device 10 shown in FIG. 5 is the same as the light emitting device 10 shown in FIGS. 1 to 3.
  • the first position P1 is located on the first surface 102 side of the substrate 100.
  • the first position P1 is shifted from the straight line L1 (that is, a straight line passing through the center C in the longitudinal direction (X direction) of the light emitting region 150 and orthogonal to the first surface 102 of the substrate 100). is doing.
  • the amount of light leaking along the longitudinal direction (X direction) of the light emitting unit 152 to the opposite side of the light emitting surface (second surface 104) of the light emitting device 10. Can be suppressed. Therefore, in the example illustrated in FIG. 5, the amount of light leaking from the plurality of light emitting units 152 toward the first position P1 can be suppressed.
  • the light emitting system 20 can be used in an automobile.
  • the light-emitting device 10 is a sign lamp (for example, a high-mount stop lamp) attached to the rear part of an automobile, specifically, a rear window, and the first position P1 is a driver's seat of the automobile.
  • the X direction is along the width direction of the automobile
  • the first surface 102 of the substrate 100 faces the inside of the automobile
  • the second surface 104 of the substrate 100 faces the outside of the automobile.
  • the amount of light leaking from the plurality of light emitting units 152 toward the first position P1 that is, the driver's seat
  • the first position P1 that is, the driver's seat
  • the amount of light from the plurality of light emitting units 152 in the X direction can be suppressed. .
  • the present embodiment it is possible to suppress the amount of light leaking along the longitudinal direction (X direction) of the light emitting unit 152 to the side opposite to the light emitting surface (second surface 104) of the light emitting device 10.
  • FIG. 6 is a diagram showing a modification of FIG.
  • both the first tab line 210 and the second tab line 220 may be located on one side of the light emitting region 150.
  • the second tab line 220 is located outside the first tab line 210, and the plurality of conductive layers 222 intersect the first tab line 210.
  • Each conductive layer 222 is covered with an insulating layer 226 in a region where the conductive layer 222 and the first tab line 210 intersect, and the first tab line 210 passes through a region above the insulating layer 226. It extends in the X direction. That is, the insulating layer 226 prevents direct contact between the conductive layer 222 and the first tab wire 210, that is, short circuit between the conductive layer 222 and the first tab wire 210.
  • FIG. 7 is a plan view illustrating the light emitting device 10 according to the first embodiment.
  • FIG. 8 is a view in which the second electrode 130 and the insulating layer 160 are removed from FIG. 7.
  • 9 is a cross-sectional view taken along the line PP in FIG. 10 is a cross-sectional view taken along the line QQ in FIG.
  • the organic layer 120 shown in FIG. 10 is removed from FIGS.
  • FIG. 7 shows details of a part of FIG. 1, that is, details of a plurality of light emitting elements 140 arranged in the Y direction.
  • the light-emitting device 10 shown in FIGS. 7 to 9 has the same configuration as the light-emitting device 10 shown in FIGS. That is, the light emitting unit 152 has a longitudinal direction in the X direction. In such a configuration, it is possible to suppress the amount of light that leaks along the longitudinal direction (X direction) of the light emitting unit 152 to the side opposite to the light emitting surface (second surface 104) of the light emitting device 10.
  • the light emitting device 10 includes a plurality of first electrodes 110, a plurality of second electrodes 130, a plurality of insulating layers 160, a conductive layer 212, a plurality of conductive layers 214, a conductive layer 222, and a plurality of conductive layers 224.
  • the conductive layer 212 and the conductive layer 214 are arranged along the X direction and extend in the Y direction. As described with reference to FIG. 1, the conductive layer 212 and the conductive layer 214 are electrically connected to the first tab line 210 and the second tab line 220, respectively. Accordingly, the potential of the first tab line 210 can be supplied to the plurality of first electrodes 110 through the conductive layer 212, and the potential of the second tab line 220 can be supplied to the plurality of second electrodes 130 through the conductive layer 222. Can be supplied.
  • the plurality of first electrodes 110 are arranged along the Y direction. Each first electrode 110 extends in the X direction, in other words, has a longitudinal direction in the X direction. Each of the plurality of first electrodes 110 is connected to the conductive layer 212 via each of the plurality of conductive layers 214. In particular, in the example illustrated in FIG. 8, the plurality of first electrodes 110, the plurality of conductive layers 214, and the conductive layer 212 are integrated. That is, the plurality of first electrodes 110, the plurality of conductive layers 214, and the conductive layers 212 are formed in the same process, and thus include the same material and have substantially the same film thickness. Yes.
  • the plurality of second electrodes 130 are arranged along the Y direction. Each second electrode 130 extends in the X direction, in other words, has a longitudinal direction in the X direction. Each of the plurality of second electrodes 130 overlaps each of the plurality of first electrodes 110. Further, each of the plurality of second electrodes 130 is connected to the conductive layer 222 through the plurality of conductive layers 224. In particular, in the example illustrated in FIG. 8, the plurality of conductive layers 224 and the conductive layers 222 are integrated. In other words, the plurality of conductive layers 224 and the conductive layers 222 are formed in the same process, and thus include the same material and have substantially the same thickness.
  • the plurality of first electrodes 110, the plurality of conductive layers 214, the conductive layer 212, the plurality of conductive layers 224, and the conductive layer 222 may be formed in the same process.
  • the plurality of first electrodes 110, the plurality of conductive layers 214, the conductive layer 212, the plurality of conductive layers 224, and the conductive layer 222 include the same material and have substantially the same film thickness. become. Furthermore, in this example, the number of manufacturing process steps of the light emitting device 10 can be reduced.
  • Each of the plurality of insulating layers 160 overlaps each of the plurality of first electrodes 110.
  • Each insulating layer 160 has an opening 162.
  • the opening 162 extends in the X direction, in other words, has a longitudinal direction in the X direction.
  • the light emitting portion 152 is defined by the opening 162. That is, the shape of the light emitting portion 152 is determined by the shape of the insulating layer 160. Therefore, when the opening 162 has the longitudinal direction in the X direction, the light emitting unit 152 also has the longitudinal direction in the X direction.
  • the light emitting device 10 includes a substrate 100 and a light emitting element 140.
  • the light emitting element 140 includes a first electrode 110, an organic layer 120, and a second electrode 130.
  • the light emitting element 140 has a light emitting portion 152 in the opening 162 of the insulating layer 160.
  • the light emitting unit 152 has a stacked structure including the first electrode 110, the organic layer 120, and the second electrode 130.
  • the first electrode 110 (conductive layer 212) extends to the outside of the insulating layer 160 via a region below the insulating layer 160. In this way, the first electrode 110 is connected to the conductive layer 214.
  • the second electrode 130 extends to the outside of the insulating layer 160 via a region above the insulating layer 160. In this way, the insulating layer 160 is connected to the conductive layer 224 and the conductive layer 222.
  • the light emitting device 10 includes a plurality of light emitting units 152 and a plurality of light transmitting units 154.
  • the light emitting unit 152 has a stacked structure including the first electrode 110, the organic layer 120, and the second electrode 130.
  • the light emitting device 10 includes a plurality of light emitting elements 140.
  • Each light emitting element 140 includes a first electrode 110, an organic layer 120, and a second electrode 130.
  • the first electrode 110, the organic layer 120, and the second electrode 130 are stacked in the opening 162 of the insulating layer 160 and function as the light emitting unit 152.
  • Each of the plurality of light transmitting portions 154 is located between the adjacent light emitting portions 152 and does not overlap the light shielding member, specifically, the second electrode 130.
  • the plurality of light emitting units 152 and the plurality of light transmitting units 154 are alternately arranged along the Y direction.
  • the first electrode 110 has translucency and conductivity.
  • the first electrode 110 includes a material having translucency and conductivity, and an inorganic material, for example, a metal oxide, specifically, for example, ITO (Indium Tin Oxide) and IZO (Indium Zinc Oxide). At least one selected from the group consisting of: For this reason, the light from the organic layer 120 can pass through the first electrode 110.
  • the organic layer 120 includes a hole injection layer (HIL), a hole transport layer (HTL), a light emitting layer (EML), an electron transport layer (ETL), and an electron injection layer (EIL).
  • HIL hole injection layer
  • HTL hole transport layer
  • EML light emitting layer
  • ETL electron transport layer
  • EIL electron injection layer
  • the EML can emit light by organic electroluminescence.
  • holes injected from the first electrode 110 via the HIL and HTL and injected from the second electrode 130 via the EIL and ETL. Light can be emitted by recombination of electrons.
  • the organic layer 120 extends over the plurality of light emitting units 152 and the plurality of light transmitting units 154, and in particular, the first surface 102 of the substrate 100 is disposed between the adjacent light emitting units 152. Covering.
  • each of the plurality of organic layers 120 may be provided in each of the plurality of light emitting elements 140.
  • the second electrode 130 has a light shielding property, more specifically, a light reflecting property, and further has conductivity.
  • the second electrode 130 includes a material having light reflectivity and conductivity, and includes, for example, a metal, specifically, for example, at least one of Al, Ag, and MgAg. For this reason, the light from the organic layer 120 is reflected by the second electrode 130 with hardly passing through the second electrode 130.
  • the insulating layer 160 includes an organic insulating material, specifically, for example, polyimide in one example, and in another example, an inorganic insulating material, specifically, for example, silicon oxide (SiO x ), silicon oxynitride. (SiON) or silicon nitride (SiN x ).
  • an organic insulating material specifically, for example, polyimide in one example
  • an inorganic insulating material specifically, for example, silicon oxide (SiO x ), silicon oxynitride. (SiON) or silicon nitride (SiN x ).
  • the insulating layer 160 has a light-transmitting property. Therefore, light from the outside of the light emitting device 10 can pass through the insulating layer 160.
  • the insulating layer 160 may have a light shielding property.
  • the second electrode 130 has an end portion 130a and an end portion 130b
  • the insulating layer 160 has an end portion 160a and an end portion 160b.
  • the end portion 130a and the end portion 160a face the same direction.
  • the end portion 130b and the end portion 160b face the same direction, and are on opposite sides of the end portion 130a and the end portion 160a, respectively.
  • the first surface 102 of the substrate 100 has a plurality of regions 102a, a plurality of regions 102b, and a plurality of regions 102c.
  • Each of the plurality of regions 102a extends from a position overlapping the end portion 130a of the second electrode 130 to a position overlapping the end portion 130b.
  • Each of the plurality of regions 102b extends from a position overlapping the end portion 130a of the second electrode 130 to a position overlapping the end portion 160a of the insulating layer 160 (or from a position overlapping the end portion 130b of the second electrode 130 to the end of the insulating layer 160. (Up to a position overlapping the portion 160b).
  • Each of the plurality of regions 102c extends from a position overlapping one end 160a of one insulating layer 160 of two adjacent insulating layers 160 to a position overlapping the end 160b of the other insulating layer 160.
  • the region 102a overlaps with the second electrode 130. Therefore, the light emitting device 10 has the lowest light transmittance in the region overlapping with the region 102a among the regions overlapping with the region 102a, the region 102b, and the region 102c. Yes.
  • the region 102c does not overlap with any of the second electrode 130 and the insulating layer 160; for this reason, the light-emitting device 10 has the highest region overlapping with the region 102c among regions overlapping with the regions 102a, 102b, and 102c. It has light transmittance.
  • the region 102b does not overlap the second electrode 130 but overlaps the insulating layer 160. Therefore, in the region overlapping the region 102b, the light emitting device 10 has higher light transmittance in the region overlapping the region 102a, and The light transmittance is lower than the light transmittance in a region overlapping with the region 102c.
  • the light transmittance of the light emitting device 10 as a whole is high.
  • the width of the region having a high light transmittance that is, the width d3 of the region 102c is widened.
  • the width d3 of the region 102c is wider than the width d2 of the region 102b ( d3> d2). In this way, the light transmittance of the light emitting device 10 as a whole is high.
  • the light emitting device 10 is prevented from absorbing much light of a specific wavelength.
  • the width of the region where light is transmitted through the insulating layer 160 that is, the width d2 of the region 102b is narrower.
  • the width d2 of the region 102b is narrower than the width d3 of the region 102c. (D2 ⁇ d3).
  • the insulating layer 160 may absorb light having a specific wavelength. Even in such a case, the amount of light transmitted through the insulating layer 160 can be reduced in the above-described configuration. In this way, the light emitting device 10 is prevented from absorbing much light of a specific wavelength.
  • the ratio d2 / d1 of the width d2 of the region 102b to the width d1 of the region 102a is 0 or more and 0.2 or less (0 ⁇ d2 / d1 ⁇ 0.2), and the ratio of the region 102c to the width d1 of the region 102a is
  • the ratio d3 / d1 of the width d3 is not less than 0.3 and not more than 2 (0.3 ⁇ d3 / d1 ⁇ 2).
  • the width d1 of the region 102a is 50 ⁇ m or more and 500 ⁇ m or less
  • the width d2 of the region 102b is 0 ⁇ m or more and 100 ⁇ m or less
  • the width d3 of the region 102c is 15 ⁇ m or more and 1000 ⁇ m or less.
  • the first electrode 110, the conductive layer 212, the conductive layer 214, the conductive layer 222, and the conductive layer 224 are formed on the first surface 102 of the substrate 100.
  • the first electrode 110, the conductive layer 212, the conductive layer 214, the conductive layer 222, and the conductive layer 224 are formed by patterning a common conductive layer. That is, the first electrode 110, the conductive layer 212, the conductive layer 214, the conductive layer 222, and the conductive layer 224 are formed in the same step.
  • the conductive layer 212, the conductive layer 214, the conductive layer 222, and the conductive layer 224 include the same material and have substantially the same thickness. Furthermore, in this method, the number of steps in the manufacturing process of the light emitting device 10 can be reduced.
  • the insulating layer 160 is formed.
  • the insulating layer 160 is formed by patterning a photosensitive resin applied on the first surface 102 of the substrate 100.
  • the organic layer 120 is formed.
  • the organic layer 120 is formed by vapor deposition.
  • the organic layer 120 may be formed by application. In this case, the material of the organic layer 120 is applied in the opening 162 of the insulating layer 160.
  • the second electrode 130 is formed.
  • the second electrode 130 is formed by vapor deposition using a mask.
  • the light emitting device 10 shown in FIGS. 7 to 10 is manufactured.
  • FIG. 11 is a plan view showing the light emitting device 10 according to the second embodiment, and corresponds to FIG. 7 of the first embodiment.
  • 12 is a cross-sectional view taken along the line PP of FIG. 11 and corresponds to FIG. 9 of the first embodiment.
  • the light emitting device 10 according to the present embodiment is the same as the light emitting device 10 according to the first embodiment except for the following points.
  • the light emitting device 10 includes a plurality of first electrodes 110, a conductive layer 212, a plurality of conductive layers 214, a plurality of second electrodes 130, a conductive layer 222, and a plurality of conductive layers 224.
  • Each of the plurality of first electrodes 110 is electrically connected to the conductive layer 212 through each of the plurality of conductive layers 214.
  • Each of the plurality of second electrodes 130 is electrically connected to the conductive layer 222 via each of the plurality of conductive layers 224.
  • the plurality of second electrodes 130, the plurality of conductive layers 224, and the conductive layer 222 are integrated. That is, the plurality of second electrodes 130, the plurality of conductive layers 224, and the conductive layer 222 are formed in the same process, and thus include the same material and have substantially the same film thickness. Yes.
  • the conductive layer 212 is formed in the same step as the plurality of second electrodes 130, the plurality of conductive layers 224, and the plurality of conductive layers 222. Therefore, the conductive layer 212, the plurality of second electrodes 130, and the plurality of conductive layers are formed.
  • the 224 and the plurality of conductive layers 222 include the same material and have substantially the same thickness.
  • the conductive layer 212 includes a material different from that of the plurality of first electrodes 110 and the plurality of conductive layers 214, and each conductive layer 212 passes through a region above each conductive layer 214. Crosses layer 214.
  • the first electrode 110 and the conductive layer 214 are formed on the first surface 102 of the substrate 100.
  • the first electrode 110 and the conductive layer 214 are formed by patterning a common conductive layer.
  • the insulating layer 160 and the organic layer 120 are formed in the same manner as in Example 1.
  • the second electrode 130, the conductive layer 212, the conductive layer 222, and the conductive layer 224 are formed.
  • the second electrode 130, the conductive layer 212, the conductive layer 222, and the conductive layer 224 are simultaneously formed by vapor deposition using a mask. That is, the second electrode 130, the conductive layer 212, the conductive layer 222, and the conductive layer 224 are formed in the same process.
  • the second electrode 130, the conductive layer 212, the conductive layer 222, and the conductive layer 224 include the same material and have substantially the same thickness. Furthermore, in this method, the number of steps in the manufacturing process of the light emitting device 10 can be reduced.
  • the light emitting device 10 shown in FIGS. 11 and 12 is manufactured.
  • FIG. 13 is a plan view illustrating the light emitting device 10 according to the third embodiment, and corresponds to FIG. 7 of the first embodiment.
  • FIG. 14 is a diagram in which the second electrode 130 and the insulating layer 160 are removed from FIG. 13, and corresponds to FIG. 8 of the first embodiment.
  • 15 is a cross-sectional view taken along the line QQ of FIG. 13 and corresponds to FIG. 10 of the first embodiment.
  • the light emitting device 10 according to the present embodiment is the same as the light emitting device 10 according to the first embodiment except for the following points.
  • the light emitting device 10 includes a plurality of conductive portions 170.
  • Each of the plurality of conductive portions 170 functions as an auxiliary electrode of each of the plurality of first electrodes 110.
  • the conductive portion 170 includes a material having a conductivity higher than that of the material included in the first electrode 110.
  • the conductive portion 170 is a metal, more specifically, MAM (Mo / Al / Mo) is included.
  • the conductive part 170 may be Al, Ag, TiAl, an Al alloy, or an Ag alloy. In the example illustrated in FIG.
  • the conductive portion 170 is located on the first electrode 110, is covered with the insulating layer 160, and does not overlap the light emitting portion 152. As shown in FIG. 14, the conductive portion 170 extends in the X direction, that is, the longitudinal direction of the first electrode 110. Therefore, even if the resistance of the first electrode 110 is high to some extent, a voltage drop in the longitudinal direction (X direction) of the first electrode 110 can be suppressed.
  • the light emitting device 10 includes a conductive portion 172.
  • the conductive portion 172 extends in the Y direction and is connected to the conductive layer 212.
  • the conductive portion 172 functions as an auxiliary electrode for the conductive layer 212.
  • the conductive portion 172 includes a material having a conductivity higher than that of the material included in the conductive layer 212.
  • the conductive portion 172 is a metal, more specifically, MAM (Mo / Al / Mo ) Is included.
  • the conductive portion 172 may be Al, Ag, TiAl, an Al alloy, or an Ag alloy. Therefore, even if the resistance of the conductive layer 212 is high to some extent, a voltage drop in the longitudinal direction (Y direction) of the conductive layer 212 can be suppressed.
  • the light emitting device 10 includes a conductive portion 174.
  • the conductive portion 174 extends in the Y direction and is connected to the conductive layer 222.
  • the conductive portion 174 functions as an auxiliary electrode for the conductive layer 222.
  • the conductive portion 174 includes a material having a conductivity higher than that of the material included in the conductive layer 222.
  • the conductive portion 174 is a metal, more specifically, MAM (Mo / Al / Mo ) Is included.
  • the conductive portion 174 may be Al, Ag, TiAl, an Al alloy, or an Ag alloy. Therefore, even if the resistance of the conductive layer 222 is high to some extent, a voltage drop in the longitudinal direction (Y direction) of the conductive layer 222 can be suppressed.
  • the conductive portion 172 is connected to the plurality of conductive portions 170, and more specifically, is integrated with the plurality of conductive portions 170.
  • the plurality of conductive portions 170, the conductive portions 172, and the conductive portions 174 can be formed in the same process.
  • the plurality of conductive portions 170, the conductive portions 172, and the conductive portions 174 include the same material as each other and have substantially the same film thickness.

Landscapes

  • Electroluminescent Light Sources (AREA)

Abstract

L'invention porte sur un dispositif électroluminescent (10) qui comporte un substrat (100) et une région électroluminescente (150). La région électroluminescente (150) comprend une pluralité d'unités électroluminescentes (152). La pluralité d'unités électroluminescentes (152) sont agencées en une matrice dans une direction X et une direction Y. Chaque unité électroluminescente (152) présente une structure stratifiée comprenant une première électrode (110), une couche organique (120) et une seconde électrode (130). Chaque unité électroluminescente (152) possède un sens long dans une première direction (direction X) et un sens court dans une seconde direction (direction Y). Plus particulièrement, chaque unité électroluminescente (152) est de forme rectangulaire avec des côtés longs dans la direction X et des côtés courts dans la direction Y.
PCT/JP2018/001896 2017-01-30 2018-01-23 Dispositif électroluminescent WO2018139426A1 (fr)

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JP2017-014040 2017-01-30
JP2017014040 2017-01-30

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WO2018139426A1 true WO2018139426A1 (fr) 2018-08-02

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012045857A1 (fr) * 2010-10-07 2012-04-12 Ledon Oled Lighting Gmbh & Co. Kg Élément d'éclairage comprenant des modules delo
JP2012146642A (ja) * 2010-12-24 2012-08-02 Semiconductor Energy Lab Co Ltd 照明装置
JP2012182128A (ja) * 2011-02-11 2012-09-20 Semiconductor Energy Lab Co Ltd 発光ユニット、発光装置、照明装置
JP2012190785A (ja) * 2011-02-21 2012-10-04 Semiconductor Energy Lab Co Ltd 照明装置
JP2013125690A (ja) * 2011-12-15 2013-06-24 Panasonic Idemitsu Oled Lighting Co Ltd 発光装置
US20130313533A1 (en) * 2012-05-28 2013-11-28 Ultimate Image Corporation Organic Light Emitting Diode Illuminating Device
JP2014002960A (ja) * 2012-06-20 2014-01-09 Mitsubishi Chemicals Corp 面発光パネル

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012045857A1 (fr) * 2010-10-07 2012-04-12 Ledon Oled Lighting Gmbh & Co. Kg Élément d'éclairage comprenant des modules delo
JP2012146642A (ja) * 2010-12-24 2012-08-02 Semiconductor Energy Lab Co Ltd 照明装置
JP2012182128A (ja) * 2011-02-11 2012-09-20 Semiconductor Energy Lab Co Ltd 発光ユニット、発光装置、照明装置
JP2012190785A (ja) * 2011-02-21 2012-10-04 Semiconductor Energy Lab Co Ltd 照明装置
JP2013125690A (ja) * 2011-12-15 2013-06-24 Panasonic Idemitsu Oled Lighting Co Ltd 発光装置
US20130313533A1 (en) * 2012-05-28 2013-11-28 Ultimate Image Corporation Organic Light Emitting Diode Illuminating Device
JP2014002960A (ja) * 2012-06-20 2014-01-09 Mitsubishi Chemicals Corp 面発光パネル

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