Organic electroluminescence device and method for fabricating the same
First Claim
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1. An organic electroluminescent (EL) device comprising:
- a substrate;
a first electrode, an organic layer and a second electrode provided on the substrate to form a light-emitting region; and
a cap to seal the light-emitting region, the cap having a caved surface between a first boundary point and a second boundary point, a top surface that faces away from the substrate and a bottom surface that faces the substrate, the cap having a thickness in a first direction between the top surface and the bottom surface, the bottom surface defining a second plane in a second direction, the caved surface including a top point that is a furthest point on the caved surface from the substrate,wherein the cap has the caved surface that satisfies a first condition, a second condition, and a third condition,wherein the first condition is that the caved surface has a depth in a range of 10 μ
m-10% of a total thickness of the cap, wherein the depth is a distance in the first direction from the second plane to the top point, and the total thickness of the cap is the thickness in the first direction between the top surface and the bottom surface,the second condition is that a distance in the second direction between the first boundary point of the caved surface and a boundary line of the light-emitting region is 70 μ
m-4 mm, andthe third condition is that an angle between the bottom surface of the cap at the first boundary point and an inclined surface of the caved surface at the first boundary point is 1°
-60°
.
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Abstract
An organic electroluminescent (EL) device is provided that may include a first electrode, an organic layer and a second electrode arranged in a light-emitting region of a substrate. The device may also include a cap for sealing the light-emitting region of the substrate. The cap may have a caved surface with a minimum depth of 10 μm and a maximum depth of 10% of a total thickness of the cap.
17 Citations
16 Claims
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1. An organic electroluminescent (EL) device comprising:
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a substrate; a first electrode, an organic layer and a second electrode provided on the substrate to form a light-emitting region; and a cap to seal the light-emitting region, the cap having a caved surface between a first boundary point and a second boundary point, a top surface that faces away from the substrate and a bottom surface that faces the substrate, the cap having a thickness in a first direction between the top surface and the bottom surface, the bottom surface defining a second plane in a second direction, the caved surface including a top point that is a furthest point on the caved surface from the substrate, wherein the cap has the caved surface that satisfies a first condition, a second condition, and a third condition, wherein the first condition is that the caved surface has a depth in a range of 10 μ
m-10% of a total thickness of the cap, wherein the depth is a distance in the first direction from the second plane to the top point, and the total thickness of the cap is the thickness in the first direction between the top surface and the bottom surface,the second condition is that a distance in the second direction between the first boundary point of the caved surface and a boundary line of the light-emitting region is 70 μ
m-4 mm, andthe third condition is that an angle between the bottom surface of the cap at the first boundary point and an inclined surface of the caved surface at the first boundary point is 1°
-60°
. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An organic electroluminescent (EL) device comprising:
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a substrate; a first electrode, an organic layer and a second electrode to form a light-emitting region on the substrate; and a cap to cover the light-emitting region, the cap having a caved surface between a first boundary point and a second boundary point, a top surface that faces away from the substrate and a bottom surface that faces the substrate, the cap having a thickness in a first direction between the top surface and the bottom surface, the bottom surface defining a second plane in a second direction, the caved surface including a top point that is a furthest point on the caved surface from the substrate, wherein the cap has the caved surface that satisfies a first condition, a second condition, and a third condition, wherein the first condition is that the caved surface has a depth in a range of 10 μ
m 10% of a total thickness of the cap, wherein the depth is a distance in the first direction from the second plane to the top point, and the total thickness of the cap is the thickness in a first direction between the top surface and the bottom surface,the second condition is that a distance in the second direction between the first boundary point of the caved surface and a boundary line of the light-emitting region is 70 μ
m-4 mm, andthe third condition is that a refractive index of the cap at the caved surface is 1.6 to 2. - View Dependent Claims (9)
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10. An organic electroluminescent (EL) device comprising:
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a substrate; a first electrode, an organic layer and a second electrode provided on the substrate to form a light-emitting region, the light emitting region including a plurality of subpixels; and a cap to seal the light-emitting region, the cap having a caved surface between a first boundary point and a second boundary point, a top surface that faces away from the substrate and a bottom surface that faces the substrate, the cap having a thickness in a first direction between the top surface and the bottom surface, the bottom surface defining a second plane in a second direction, the caved surface including a top point that is a furthest point on the caved surface from the substrate, wherein the cap has the caved surface that satisfies a first condition, a second condition, and a third condition, wherein the first condition is that the caved surface has a depth in a range of 10 μ
m-10% of a total thickness of the cap, wherein the depth is a distance in the first direction from the second plane to the top point, and the total thickness of the cap is the thickness in a first direction between the top surface and the bottom surface,the second condition is that a distance in the second direction between the first boundary point of the caved surface and a boundary line of the light-emitting region is 70 μ
m-4 mm, andthe third condition is that an angle between the bottom surface of the cap at the first boundary point and an inclined surface of the caved surface at the first boundary point is 1°
-60°
;wherein at least one of the plurality of subpixels includes a phosphorescence material. - View Dependent Claims (11, 12, 13)
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14. An organic electroluminescent (EL) device comprising:
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a substrate; a first electrode, an organic layer and a second electrode provided on the substrate to form a light-emitting region; and a cap to seal the light-emitting region, the cap having a caved surface between a first boundary point and a second boundary point, a top surface that faces away from the substrate and a bottom surface that faces the substrate, the cap having a thickness in a first direction between the top surface and the bottom surface, the bottom surface defining a second plane in a second direction, the caved surface including a top point that is a furthest point on the caved surface from the substrate, wherein the cap has the caved surface that satisfies a first condition, a second condition, a third condition and a fourth condition, wherein the first condition is that the caved surface has a depth in a range of 10 μ
m-10% of a total thickness of the cap, wherein the depth is a distance in the first direction from the second plane to the top point, and the total thickness of the cap is the thickness in a first direction between the top surface and the bottom surface,the second condition is that a distance in the second direction between the first boundary point of the caved surface and a boundary line of the light-emitting region is 70 μ
m-4 mm, andthe third condition is that an angle between the bottom surface of the cap at the first boundary point and an inclined surface of the caved surface at the first boundary point is 1°
-60°
,the fourth condition is that a refractive index of the cap at the caved surface is 1.6 to 2. - View Dependent Claims (15, 16)
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Specification
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Current AssigneeLG Electronics, Inc. (LG Corporation)
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Original AssigneeLG Electronics, Inc. (LG Corporation)
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InventorsKim, Woo Chan, Lee, Kyung Hoon
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Primary Examiner(s)Guharay; Karabi
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Assistant Examiner(s)QUARTERMAN, KEVIN J
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Application NumberUS11/963,396Publication NumberTime in Patent Office774 DaysField of Search313498-512US Class Current313/512CPC Class CodesH10K 50/841 Self-supporting sealing arr...Y10T 428/23 Sheet including cover or ca...
