EP0781075A1
Expired / Lapsed
EP
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Method for sealing organic el element and organic el element
Assignee: Idemitsu Kosan Co Ltd
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Filing: 1995-09-05
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Granted: —
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Expires: 2015-09-05
Abstract
Abstract Being concerned with the method of encapsulation for an organic EL device, the present invention overcomes the difficulty of conventional methods in fully preventing the growth of dark spots in the organic EL device by providing an inert liquid layer having a dissolved oxygen concentration of 1 ppm or less on the periphery of the organic EL device.
Inventors
- 👤 Masato Fujita
- 👤 Kenichi Fukuoka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 22:05
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/02; H05B33/04; H10; H10K; H10K50/00; H10K50/80; H10K50/84; H10K50/842; H10K50/8426; H10K50/846
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
50 words
A method of encapsulating for an organic EL device, which comprises providing a layer of an inert liquid having a dissolved oxygen concentration of 1 ppm or less on the periphery of an organic EL device formed by laminating an anode and a cathode through at least a light-emitting layer.
Claim 2
Dependent Claim
25 words
The method of claim 1, wherein the method uses, as an inert liquid, an inert liquid having a water content of 10 ppm or less.
Claim 3
Dependent Claim
29 words
The method of claim 1, wherein the method uses, as an inert liquid, a liquid fluorinated carbon having a vapor pressure of 10 -2 Torr or less at 25°C.
Claim 4
Dependent Claim
82 words
The method of claim 1, wherein the layer of an inert liquid is formed by providing a housing material, which is to cover the organic EL device formed on a substrate in combination with the substrate while forming a space between the organic EL device and the housing material, outside the organic EL device, and filling the inert liquid having a dissolved oxygen concentration of 1 ppm or less in the space formed by the above substrate and the above housing material.
Claim 5
Dependent Claim
19 words
The method of claim 1, wherein the method uses, as an inert liquid, an inert liquid containing an adsorbent.
Claim 6
Dependent Claim
87 words
The method of claim 5, wherein the method uses, as an adsorbent, (1) an inorganic compound selected from activated alumina, diatomaceous earth, activated carbon, hemihydrated gypsum, phosphorus pentoxide, magnesium perchlorate, potassium hydroxide, calcium sulfate, calcium bromide, calcium oxide, zinc chloride, zinc bromide or anhydrous copper sulfate, (2) a metal selected from the metal group consisting of lithium, beryllium, potassium, sodium, magnesium, rubidium, strontium and calcium, (3) an alloy of metals selected from the above metal group, or (4) an acrylic water-absorption polymer or a methacrylic water-absorption polymer.
Claim 7
Dependent Claim
17 words
The method of claim 5, wherein the method uses, as an adsorbent, an adsorbent which is activation-treated.
Claim 8
Dependent Claim
24 words
The method of claim 5, wherein the inert liquid contains 1 mg to 10 g of the adsorbent per milliliter of the inert liquid.
Claim 9
Dependent Claim
25 words
The method of claim 5, wherein the method uses, as an inert liquid, an inert liquid having a water content of 10 ppm or less.
Claim 10
Dependent Claim
29 words
The method of claim 5, wherein the method uses, as an inert liquid, a liquid fluorinated carbon having a vapor pressure of 10 -2 Torr or less at 25°C.
Claim 11
Dependent Claim
75 words
The method of claim 5, wherein the layer of the inert liquid containing the adsorbent is formed by providing a housing material, which is to cover the organic EL device formed on a substrate in combination with the substrate while forming a space between the organic EL device and the housing material, outside the organic EL device, and filling the inert liquid in the space formed by the above substrate and the above housing material.
Claim 12
Dependent Claim
44 words
An encapsulated organic EL device having an organic EL device and a layer of an inert liquid which is provided on the periphery of the organic EL device, the layer of the inert liquid having a dissolved oxygen concentration of 1 ppm or less.
Claim 13
Dependent Claim
21 words
The encapsulated organic EL device of claim 12, wherein the inert liquid has a water content of 10 ppm or less.
Claim 14
Dependent Claim
29 words
The encapsulated organic EL device of claim 12, wherein the inert liquid is a liquid fluorinated carbon having a vapor pressure of 10 -2 Torr or less at 25°C.
Claim 15
Dependent Claim
24 words
The encapsulated organic EL device of claim 12, wherein the layer of the inert liquid is formed of an inert liquid containing an adsorbent.
Claim 16
Dependent Claim
87 words
The encapsulated organic EL device of claim 15, wherein the adsorbent is (1) an inorganic compound selected from activated alumina, diatomaceous earth, activated carbon, hemihydrated gypsum, phosphorus pentoxide, magnesium perchlorate, potassium hydroxide, calcium sulfate, calcium bromide, calcium oxide, zinc chloride, zinc bromide or anhydrous copper sulfate, (2) a metal selected from the metal group consisting of lithium, beryllium, potassium, sodium, magnesium, rubidium, strontium and calcium, (3) an alloy of metals selected from the above metal group, or (4) an acrylic water-absorption polymer or a methacrylic water-absorption polymer.
Claim 17
Dependent Claim
15 words
The encapsulated organic EL device of claim 15, wherein the adsorbent is an activation-treated adsorbent.
Claim 18
Dependent Claim
26 words
The encapsulated organic EL device of claim 15, wherein the inert liquid 1 mg to 10 g of the adsorbent per milliliter of the inert liquid.
Claim 19
Dependent Claim
74 words
The encapsulated organic EL device of claim 12, wherein the organic EL device is formed on a substrate, a housing material, which is to cover the organic EL device in combination with the substrate while forming a space between the organic EL device and the housing material, is provided outside the organic EL device, and the layer of the inert liquid is formed in the space formed by the substrate and the housing material.
References Cited (Backward Citations)
No citation records indexed.
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