CN111081889B - Lighting device - Google Patents

Lighting device Download PDF

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Publication number
CN111081889B
CN111081889B CN201911147946.XA CN201911147946A CN111081889B CN 111081889 B CN111081889 B CN 111081889B CN 201911147946 A CN201911147946 A CN 201911147946A CN 111081889 B CN111081889 B CN 111081889B
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light emitting
organic light
light
emitting unit
lighting device
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CN201911147946.XA
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CN111081889A (en
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袁涛
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H10K50/81—Anodes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H10K50/82—Cathodes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

The application provides a lighting device, and the lighting device includes first light emitting unit, and first light emitting unit includes a plurality of first organic light emitting diodes, and a first positive pole, a first negative pole and the first organic luminescent layer that is located between first positive pole and the first negative pole are shared to a plurality of first organic light emitting diodes. Compared with the prior art that the organic light emitting diodes emitting different color light form the light emitting unit, the organic light emitting diodes emitting the same color light are concentrated and share the anode, the cathode and the organic light emitting layer, so that the lighting device has the lighting function, and meanwhile, the device manufacturing process of the lighting device can be simplified.

Description

Lighting device
Technical Field
The application relates to the technical field of lighting, in particular to a lighting device.
Background
Currently, it has become mainstream to apply an Organic Light Emitting Diode (OLED) display panel screen to a smart mobile device. Compared with a Liquid Crystal Display (LCD), the oled Display panel has the advantages of thin thickness, short response time, high contrast, and large viewing angle. Especially, the organic light emitting diode display panel has good application prospect on flexible display equipment, and attracts the great investment of most of domestic and foreign manufacturers. However, the use of organic light emitting diodes for illumination is still less emerging.
Disclosure of Invention
An object of the present application is to provide a lighting device whose manufacturing process is simple.
In order to achieve the purpose, the technical scheme is as follows.
A lighting device comprising a first light emitting unit comprising a plurality of first organic light emitting diodes sharing a first anode, a first cathode, and a first organic light emitting layer between the first anode and the first cathode.
In the above lighting device, the lighting device further includes a display unit including a plurality of second organic light emitting diodes, each of the second organic light emitting diodes including a second anode, a second cathode, and a second organic light emitting layer between the second anode and the second cathode.
In the above lighting device, the lighting device further includes a plurality of pixel driving circuits, each of which is configured to drive one of the second organic light emitting diodes to emit light.
In the above lighting device, the lighting device further includes a second light emitting unit including a plurality of third organic light emitting diodes sharing a third anode, a third cathode, and a third organic light emitting layer between the third anode and the third cathode, and a color of light emitted from the first organic light emitting diode, a color of light emitted from the second organic light emitting diode, and a color of light emitted from the third organic light emitting diode are different from each other.
In the above lighting device, the first light emitting unit, the second light emitting unit, and the display unit are arranged side by side, and the second light emitting unit is provided between the first light emitting unit and the display unit.
In the above lighting device, the size of the second light emitting unit is equal to the size of the first light emitting unit, and the size of the first light emitting unit is equal to the size of the display unit.
In the above lighting device, the first organic light emitting diode, the second organic light emitting diode, and the third organic light emitting diode each emit one of red light, blue light, and green light and are different from each other.
In the lighting device, the first light emitting unit, the second light emitting unit, and the display unit are all in a stripe shape.
In the above lighting device, the lighting device further includes a third light emitting unit, the third light emitting unit includes a plurality of fourth organic light emitting diodes, the plurality of fourth organic light emitting diodes share a fourth anode, a fourth cathode, and a fourth organic light emitting layer between the fourth anode and the fourth cathode, and a color of light emitted by the fourth organic light emitting diode is the same as a color of light emitted by the second organic light emitting diode.
In the above lighting device, the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the display unit are arranged side by side, the second light-emitting unit is disposed between the first light-emitting unit and the third light-emitting unit, and the third light-emitting unit is disposed between the second light-emitting unit and the display unit.
Has the advantages that: the application provides a lighting device, and the lighting device includes a first light-emitting unit, and the first light-emitting unit includes a plurality of first organic light-emitting diodes, and a plurality of first organic light-emitting diodes share a first anode, a first cathode and a first organic light-emitting layer located between the first anode and the first cathode. Compared with the prior art that the organic light emitting diodes emitting different color light form the light emitting unit, the organic light emitting diodes emitting the same color light are concentrated and share the anode, the cathode and the organic light emitting layer to form the first light emitting unit, so that the lighting device has the lighting function, and meanwhile, the device manufacturing process of the lighting device can be simplified.
Drawings
FIG. 1 is a schematic plan view of a lighting device according to a first embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of the lighting device of FIG. 1 taken along line A-A;
fig. 3 is a schematic plan view of a lighting device according to a second embodiment of the present application.
The figures are numbered:
100 a lighting device; 101a first light emitting unit; 102a display unit; 103a second light emitting unit; 104 a third light emitting unit; 105 pixel driving circuits; 106 a substrate; 107 thin film encapsulation layers; 101a first organic light emitting diode; 1011 a first anode; 1012 a first cathode; 1013 first organic light emitting layer; 1014 a first hole injection layer; 1015 a first hole transport layer; 1016 first electron injection layer; 1017 a first electron transport layer; 102a second organic light emitting diode; 1021 a second anode; 1022 a second cathode; 1023 a second organic light-emitting layer; 1024 a second hole injection layer; 1025 a second hole transport layer; 1026 second electron injection layer; 1027 a second electron transport layer; 103a third organic light emitting diode; 1031 a third anode; 1032 a third cathode; 1033 a third organic light emitting layer; 1034 third hole injection layer; 1035 a third hole transport layer; 1036 a third electron injection layer; 1037 a third electron transport layer.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic plan view of a lighting device according to a first embodiment of the present application, and fig. 2 is a schematic cross-sectional view of the lighting device shown in fig. 1 along a line a-a. The lighting device 100 includes a first light emitting unit 101, a display unit 102, and a second light emitting unit 103.
The first light emitting unit 101 includes a plurality of first organic light emitting diodes 101 a. The plurality of first organic light emitting diodes 101a share one first anode 1011, one first cathode 1012, and a first organic light emitting layer 1013 between the first anode 1011 and the first cathode 1012. A first anode 1011 is a full-surface electrode, a first cathode 2012 is a full-surface electrode, and a first organic light emitting layer 1013 is a full-surface first organic light emitting layer. The first anode 1011 is made of at least one material selected from the group consisting of indium tin oxide, indium zinc oxide, silver, and magnesium. The first anode 1011 may be formed by at least one of sputter deposition, vacuum evaporation, and chemical vapor deposition. The first cathode 1012 is made of at least one material selected from the group consisting of indium tin oxide, indium zinc oxide, silver, and magnesium. The first cathode 1012 may be formed by at least one of sputter deposition, vacuum evaporation, and chemical vapor deposition. The first organic light emitting layer 1013 includes an organic light emitting material, and the organic light emitting material may be one of a red organic light emitting material, a blue organic light emitting material, a green organic light emitting material, and a white organic light emitting material. The first organic light emitting layer 1013 may be formed by one of vacuum evaporation and inkjet printing.
The plurality of first organic light emitting diodes 101a share a first anode 1011, a first cathode 1012 and a first organic light emitting layer 1013, so that the plurality of first organic light emitting diodes 101a are collectively designed and constitute a first light emitting unit 101. When the evaporation process is used to prepare the first organic light emitting layer 1013 or the metal electrode of the first light emitting unit 101, the organic light emitting layer can be prepared without using a fine mask; when the ink-jet printing process is used to fabricate the first organic light emitting layer 1013 of the first light emitting unit 101, there is an advantage in that the device fabrication process is simplified compared to the conventional display pixel using the standard RGB or Pentile pixel design. In general, the first organic light emitting diodes 101a share the first anode 1011, the first cathode 1012 and the first organic light emitting layer 1013 to form the first light emitting unit 101, so that the lighting device has a lighting function and also has an advantage of simplifying a device manufacturing process compared to a manufacturing process of a conventional pixel design.
The display unit 102 includes a plurality of second organic light emitting diodes 102a, and each of the second organic light emitting diodes 102a includes a second anode 1021, a second cathode 1022, and a second organic light emitting layer 1023 between the second anode 1021 and the second cathode 1022. The second anodes 1021 of the second organic light emitting diodes 102a are independent, the second cathodes 1022 of the second organic light emitting diodes 102a are independent, and the second organic light emitting layers 1023 of the second organic light emitting diodes 102a are independent, i.e. the display unit 102 is formed by the independent second organic light emitting diodes 102a as independent display pixels. The second anode 1021 is made of the same material as that of the first anode 1011. The second cathode 1022 is made of the same material as the first cathode 1012.
The lighting device 100 further includes a plurality of pixel driving circuits 105, and each pixel driving circuit 105 is configured to drive one second organic light emitting diode 102a to emit light. The organic light emitting diode 102a is controlled by the pixel driving circuit 105 to exhibit different brightness for displaying. Each pixel drive circuit 105 includes a thin film transistor or the like. The thin film transistor may be a polysilicon thin film transistor or a metal oxide thin film transistor. Part of the film layer in the pixel driving circuit is manufactured by adopting a yellow light process.
The second light emitting unit 103 includes a plurality of third organic light emitting diodes 103 a. The plurality of third organic light emitting diodes 103a share a third anode 1031, a third cathode 1032 and a third organic light emitting layer 1033 between the third anode 1031 and the third cathode 1032. The third anode 1031 is made of the same material as the first anode 1011. Third cathode 1032 is made of the same material as first cathode 1012.
The color of light emitted from the first organic light emitting diode 101a, the color of light emitted from the second organic light emitting diode 102a, and the color of light emitted from the third organic light emitting diode 103a are different from each other. The first, second and third organic light emitting diodes 101a, 102a and 103a emit one of red light, blue light and green light, respectively, and are different from each other.
Specifically, the first organic light emitting diode 101a emits red light to make the first light emitting unit 101 emit red light; the second organic light emitting diodes 102a emit blue light, and the plurality of second organic light emitting diodes 102a adopt blue light with different brightness so that the display unit 102 adopts the blue light to display; the third organic light emitting diode 103a emits green light so that the second light emitting unit 103 emits green light.
The first light emitting unit 101, the second light emitting unit 103, and the display unit 102 are arranged side by side, and the second light emitting unit 103 is disposed between the first light emitting unit 101 and the display unit 102. The red light emitted by the first light emitting unit 101, the green light emitted by the second light emitting unit 103, and the blue light emitted by the display unit 102 are mixed to make the lighting device 100 emit white light for lighting, and the lighting device 100 has a function of white light lighting and can also use blue light pixels for picture display.
The size of the second light emitting unit 103 is equal to the size of the first light emitting unit 101 and the size of the first light emitting unit 101 is equal to the size of the display unit 102, so that the mixing effect of the light emitted from the first light emitting unit 101, the second light emitting unit 103, and the display unit 102 is controlled. The first light emitting unit 101, the second light emitting unit 102 and the display unit 103 are all in the shape of a bar.
The first light emitting unit 101 further includes a first hole injection layer 1014, a first hole transport layer 1015, a first electron injection layer 1016, and a first electron transport layer 1017. The first hole injection layer 1014 is located between the first anode 1011 and the first organic light emitting layer 1013, and the first hole transport layer 1015 is located between the first hole injection layer 1014 and the first organic light emitting layer 1013. The first electron injection layer 1016 is positioned between the first cathode 1012 and the first organic light emitting layer 1013, and the first electron transport layer 1017 is positioned between the first electron injection layer 1016 and the first organic light emitting layer 1013. The first hole injection layer 1014, the first hole transport layer 1015, the first electron injection layer 1016, and the first electron transport layer 1017 are shared by the plurality of first organic light emitting diodes 101a, thereby improving the light emitting performance of the first light emitting unit 101 and further simplifying the manufacturing process of the lighting device 100.
Each of the second organic light emitting diodes 102a further includes a second hole injection layer 1024, a second hole transport layer 1025, a second electron injection layer 1026, and a second electron transport layer 1027. A second hole injection layer 1024 is positioned between the second anode 1021 and the second organic light emitting layer 1023, and a second hole transport layer 1025 is positioned between the second hole injection layer 1024 and the second organic light emitting layer 1023. The second electron injection layer 1026 is positioned between the second cathode 1022 and the second organic light emitting layer 1023. The second electron transport layer 1027 is located between the second electron injection layer 1026 and the second organic light emitting layer 1023 to further improve the display effect of the display unit 102.
The second light emitting unit 103 further includes a third hole injection layer 1034, a third hole transport layer 1035, a third electron injection layer 1036, and a third electron transport layer 1037. The third hole injection layer 1034 is located between the third anode 1031 and the third organic light emitting layer 1033, and the third hole transport layer 1035 is located between the third hole injection layer 1034 and the third organic light emitting layer 1033. A third electron injection layer 1036 is positioned between the second cathode 1032 and the third organic light emitting layer 1033, and a third electron transport layer 1037 is positioned between the third electron injection layer 1036 and the third organic light emitting layer 1033. The third hole injection layer 1034, the third hole transport layer 1035, the third electron injection layer 1036, and the third electron transport layer 1037 are shared by the plurality of third organic light emitting diodes 103a, so that the light emitting performance of the second light emitting unit 103 is improved, and the manufacturing process of the lighting device 100 is further simplified.
The lighting device 100 further includes a substrate 106, and the substrate 106 is used as a carrier for carrying the first light emitting unit 101, the second light emitting unit 103, and the display unit 102. The substrate is a flexible substrate, such as a polyimide layer, to make the illumination device 100 foldable.
The lighting apparatus 100 further includes a film encapsulation layer 107, and the film encapsulation layer 107 is used for protecting the device carried on the substrate 106 from being corroded. The film encapsulation seal 107 covers the first light emitting unit 101, the second light emitting unit 103, and the display unit 102. The thin film encapsulation layer 107 includes a first inorganic layer, a second inorganic layer, and a first organic layer between the first inorganic layer and the second inorganic layer. The good barrier property of the inorganic layer against water and gas and the good flexibility of the organic layer are utilized to make the thin film encapsulation layer have good flexibility and barrier property, so that the lighting device 100 has good flexibility and reliable performance as a whole.
It should be noted that the organic light emitting layers, the hole injection layers, and the electron injection layers in the first light emitting unit 101 and the second light emitting unit 103 can be formed by vacuum evaporation and inkjet printing, so that the device manufacturing processes of the first light emitting unit 101 and the second light emitting unit 103 are simplified compared to the conventional technology.
Please refer to fig. 3, which is a schematic plan view of a lighting device according to a second embodiment of the present application. The lighting device shown in fig. 3 is substantially similar to the lighting device shown in fig. 1, except that the lighting device 100 further includes a third light emitting unit 104, the third light emitting unit 104 includes a plurality of fourth organic light emitting diodes, the plurality of fourth organic light emitting diodes share a fourth anode, a fourth cathode and a fourth organic light emitting layer between the fourth anode and the fourth cathode, and the color of light emitted by the fourth organic light emitting diode is the same as the color of light emitted by the second organic light emitting diode 102 a.
The first light emitting unit 101, the second light emitting unit 103, and the third light emitting unit 104 each independently emit one of red light, blue light, and green light, so that the lighting device can emit white light. And one of red light, blue light and green light is emitted by the display unit 102 for image display, so that the illumination performance of the illumination device 100 is further improved.
The first light emitting unit 101, the second light emitting unit 103, the third light emitting unit 104 and the display unit 102 are arranged side by side, the second light emitting unit 103 is arranged between the first light emitting unit 101 and the third light emitting unit 104, and the third light emitting unit 104 is arranged between the second light emitting unit 103 and the display unit 102, so that the third light emitting unit 104 emitting the same light is arranged adjacent to the display unit 102, so that the manufacturing processes of the third light emitting unit 104 and the display unit 102 are simplified, and the device manufacturing process of the lighting device is further simplified. The size of the third light emitting unit 103 is equal to that of the first light emitting unit 101.
It is understood that the third light emitting unit 104 also includes a fourth hole injection layer, a fourth hole transport layer, a fourth electron injection layer, and a fourth electron transport layer. The fourth hole injection layer is positioned between the fourth anode and the fourth organic luminescent layer, and the fourth hole transport layer is positioned between the fourth hole injection layer and the fourth organic luminescent layer. The fourth electron injection layer is positioned between the fourth cathode and the fourth organic luminescent layer, and the fourth electron transport layer is positioned between the fourth electron injection layer and the fourth organic luminescent layer.
The above description of the embodiments is only for assisting understanding of the technical solutions and the core ideas thereof; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims (8)

1. An illumination device comprising a first light-emitting unit including a plurality of first organic light-emitting diodes sharing a first anode, a first cathode, and a first organic light-emitting layer between the first anode and the first cathode;
the lighting device further comprises a display unit comprising a plurality of second organic light emitting diodes, each of the second organic light emitting diodes comprising a second anode, a second cathode and a second organic light emitting layer between the second anode and the second cathode;
the lighting device further comprises a second light-emitting unit, wherein the second light-emitting unit comprises a plurality of third organic light-emitting diodes, the third organic light-emitting diodes share a third anode, a third cathode and a third organic light-emitting layer positioned between the third anode and the third cathode, and the color of light emitted by the first organic light-emitting diode, the color of light emitted by the second organic light-emitting diode and the color of light emitted by the third organic light-emitting diode are different from each other.
2. A lighting device as recited in claim 1, further comprising a plurality of pixel drive circuits, each of said pixel drive circuits being configured to drive one of said second organic light emitting diodes to emit light.
3. A lighting device as recited in claim 1, wherein said first light-emitting unit, said second light-emitting unit and said display unit are disposed side-by-side, said second light-emitting unit being disposed between said first light-emitting unit and said display unit.
4. The lighting device according to claim 1, wherein the size of the second light-emitting unit is equal to the size of the first light-emitting unit, and the size of the first light-emitting unit is equal to the size of the display unit.
5. A lighting device as recited in claim 1, wherein said first light-emitting unit, said second light-emitting unit and said display unit are each strip-shaped.
6. The illumination device of claim 1, wherein the first, second and third organic light emitting diodes each emit a different one of red, blue and green light and are different from each other.
7. The lighting device according to claim 6, further comprising a third light-emitting unit including a plurality of fourth organic light-emitting diodes, wherein the plurality of fourth organic light-emitting diodes share a fourth anode, a fourth cathode, and a fourth organic light-emitting layer between the fourth anode and the fourth cathode, and wherein the color of light emitted by the fourth organic light-emitting diode is the same as the color of light emitted by the second organic light-emitting diode.
8. The lighting device according to claim 7, wherein the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the display unit are arranged side by side, wherein the second light-emitting unit is arranged between the first light-emitting unit and the third light-emitting unit, and wherein the third light-emitting unit is arranged between the second light-emitting unit and the display unit.
CN201911147946.XA 2019-11-21 2019-11-21 Lighting device Active CN111081889B (en)

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CN102077385A (en) * 2008-06-30 2011-05-25 佳能株式会社 Light-emitting apparatus
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