Organic electroluminescence display device

An electroluminescence display and display device technology, which is applied in the direction of electroluminescence light sources, electric light sources, lighting devices, etc., can solve problems such as manufacturing difficulties and insufficient selectivity

Active Publication Date: 2009-04-29
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] (1) In order to form a full-color display device, it is necessary to manufacture EL elements corresponding to each color, and the film thickness of the EL element must be set to the film thickness corresponding to the color of each pixel, so manufacturing is difficult
[0016] (2) Due to the condition that m is small in the above formula, the selection of light may not be sufficient

Method used

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  • Organic electroluminescence display device
  • Organic electroluminescence display device
  • Organic electroluminescence display device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0047] FIG. 1 is a diagram showing an organic EL display device according to a first embodiment of the present invention.

[0048] The organic EL display device 1 has a first organic EL element portion 10 and a second organic EL element portion 20 juxtaposed on a substrate 11 .

[0049] The first organic EL element unit 10 has a structure in which a light-reflective conductive layer 12 , an organic light-emitting medium layer 13 , a light-reflective layer 14 , and a transparent electrode layer 15 are sequentially stacked on a substrate 11 .

[0050] The second organic EL element unit 20 has a structure in which a light reflective conductive layer 12 , a first inorganic compound layer 21 , an organic luminescent medium layer 13 , a light reflective layer 14 , and a transparent electrode layer 15 are sequentially stacked on a substrate 11 .

[0051] The light-reflecting conductive layer 12 is a layer that functions as an electrode for supplying holes or electrons and reflects li...

no. 2 approach

[0061] FIG. 2 is a diagram showing an organic EL display device according to a second embodiment of the present invention.

[0062] The organic EL display device 2 has a second organic EL element unit 20 and a third organic EL element unit 30 provided side by side on a substrate 11 .

[0063] The second organic EL element portion 20 is the same as that of the first embodiment described above.

[0064] The third organic EL element part 30 has a light-reflective conductive layer 12, a first inorganic compound layer 21, a second inorganic compound layer 31, an organic light-emitting medium layer 13, a light-reflective layer 14, and a transparent electrode layer 15 stacked in this order on the substrate 11. Structure. That is, the function of each layer is the same as that of the second organic EL element portion 20 except for the formation of the second inorganic compound layer 31 .

[0065] The second inorganic compound layer 31 formed on the third organic EL element portion 3...

no. 3 approach

[0071] FIG. 3 is a diagram showing an organic EL display device according to a third embodiment of the present invention.

[0072] The organic EL display device 3 has a first organic EL element portion 10 , a second organic EL element portion 20 , and a third organic EL element portion 30 juxtaposed on a substrate 11 .

[0073] The structure of each organic EL element part 10, 20, 30 is the same as that of the said 1st and 2nd embodiment, and the function of each layer is also the same.

[0074] In the organic EL display device 3 , the organic EL element portions 10 , 20 , and 30 each have a resonator structure having a different optical distance (optical film thickness). That is, the optical distance is L1 in the first organic EL element section 10 , L2 in the second organic EL element section 20 , and L3 in the third organic EL element section 30 .

[0075] Therefore, in each of the organic EL element portions 10 , 20 , and 30 , lights (λ1, λ2, and λ3) having different wave...

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Abstract

The invention provides an organic EL display device, which has a substrate (11), and a first organic EL element part (10) and a second organic EL element part (20) juxtaposed on the same surface of the substrate; The EL element part (10) comprises at least a light-reflecting conductive layer (12), an organic light-emitting medium layer (13), and a transparent electrode layer (15) in order, and is formed on the organic light-emitting medium layer (13) or the transparent electrode layer (15) An element having a light reflective layer (14) inside or outside; the second organic EL element part (20) at least includes a light reflective conductive layer (12), a first inorganic compound layer (21), an organic luminescent medium layer ( 13), and a transparent electrode layer (15) and an element having a light reflection layer (14) inside or outside the organic luminescent medium layer (13) or the transparent electrode layer (15); from the first organic EL element part (10) The emission spectrum of the emitted light is different from that of the light emitted from the second organic EL element unit (20).

Description

technical field [0001] The invention relates to an organic electroluminescent display device. More specifically, the present invention relates to an organic electroluminescent display device capable of emitting light in multiple colors by arranging organic electroluminescent element portions having resonator structures having different optical distances in parallel on the same substrate. Background technique [0002] As a full-color technology using organic electroluminescence (hereafter, EL is sometimes referred to as "electroluminescence"), there are three-color separation coating methods, a method of combining color filters with white EL, and a combination of EL, Color conversion film and color filter method, etc. [0003] In the three-color separation coating method, high efficiency can be achieved by adjusting the balance of materials and reducing the loss of circular polarizing plates. However, this separation coating technique is difficult, so it is difficult to rea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B33/24H05B33/12H05B33/14H05B33/26H05B33/28
Inventor 山道桂子福冈贤一汤浅公洋细川地潮熊均
Owner IDEMITSU KOSAN CO LTD
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