US 7,071,618 B2Granted

Electroluminescent element comprising electrically coupled shield layer

AssigneeMatsushita Electric Industrial Co., Ltd.

InventorsTakayuki Ishikawa, Masatoshi Takenaka, Tetsuro Hanahara

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Abstract

An EL element includes a) an outer connecting part, b) a substrate comprising a light-transmitting and insulating sheet, c) a light-transmitting electrode layer formed on the substrate wholly or except the outer connecting part in a specific pattern, d) a light emitting layer formed on the light-transmitting electrode layer in a specific pattern, e) a dielectric layer formed on the light emitting layer in a specific pattern, f) a backside electrode layer formed on the dielectric layer in a specific pattern, g) an insulating layer formed on the backside electrode layer and the light-transmitting electrode layer except the outer connecting part, and h) a shielding layer formed on the insulating layer in a specific pattern. The light-transmitting electrode layer or the backside electrode layer is coupled with the shielding layer. The EL element is thus arranged so that it can have its outer connecting part of a reduced size, and so that coupling with the electronic device becomes easy.

Claims18

Dependent claims

An EL element comprising:

a light-transmitting and insulating substrate having a main part and an outer connecting part protruding from said main part to allow for connection to an electronic device:
a first electrode provided on said substrate, said first electrode including a first electrode part provided on said main part of said substrate, and a first electrode terminal extending from said first electrode part onto said outer connecting part;
a light-transmitting electrode layer formed on said substrate and being electrically coupled with said first electrode part;
a light emitting layer formed on said light-transmitting electrode layer;
a dielectric layer formed on said light emitting layer;
a backside electrode layer formed on said dielectric layer;
a second electrode electrically coupled to said backside electrode layer, said second electrode including a second electrode terminal extending from said backside electrode layer onto said outer connecting part;
an insulating layer formed on said backside electrode layer and on portions of said light-transmitting electrode layer not covered by at least one of said light emitting layer, said dielectric layer and said backside electrode layer;
and
a shielding layer formed on said insulating layer;
wherein one of said light-transmitting electrode layer and said backside electrode layer is electrically coupled with said shielding layer;
wherein at a peripheral part of said substrate, a non-luminous part is formed, said non-luminous part having no light emitting layer, no dielectric layer and no backside electrode layer formed on said substrate;
wherein a hole is formed through said insulating layer at said non-luminous part and penetrates from said shielding layer to said light-transmitting electrode layer;
wherein a conductive material is provided in said hole to form a connecting portion that couples said light-transmitting electrode layer with said shielding layer;
and
wherein said connecting portion and said shielding layer are formed of substantially an identical conductive material.

13 more elements

An EL element comprising:

a light-transmitting and insulating substrate having a main part and an outer connecting part protruding from said main part to allow for connection to an electronic device;
a first electrode provided on said substrate, said first electrode including a first electrode part provided on said main part of said substrate, and a first electrode terminal extending from said first electrode part onto said outer connecting part;
a light-transmitting electrode layer formed on said substrate and being electrically coupled with said first electrode part;
a light emitting layer formed on said light-transmitting electrode layer;
a dielectric layer formed on said light emitting layer;
a backside electrode layer formed on said dielectric layer;
a second electrode electrically coupled to said backside electrode layer, said second electrode including a second electrode terminal extending from said backside electrode layer onto said outer connecting part;
an insulating layer formed on said backside electrode layer and on portions of said light-transmitting electrode layer not covered by at least one of said light emitting layer, said dielectric layer and said backside electrode layer;
and
a shielding layer formed on said insulating layer;
wherein one of said light-transmitting electrode layer and said backside electrode layer is electrically coupled with said shielding layer;
wherein a hole is formed in said insulating layer at a luminous part at which said light emitting layer, said dielectric layer and said backside electrode layer are formed;
wherein said hole penetrates from said shielding layer to said light-transmitting electrode layer, and an inner periphery of said hole is covered with an insulating material;
and
wherein a conductive material is provided in said hole to form a connecting portion that couples said light-transmitting electrode layer with said shielding layer.

12 more elements

Dependencies are inferred from the claim text.