EP0350907A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Thin film electroluminescent panel

Assignee: Sharp Corp

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Filing: 1989-07-13

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Granted: —

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Expires: 2009-07-13

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Abstract

Abstract Disclosed is a thin film EL panel having a high reliability. The thin film EL panel is thin, light, and low cost. The present invention provides in a thin film electroluminescent (EL) panel comprising a light permeable base plate, a thin film EL element formed on the base plate and a moisture-proof sheet covered thereon, an improvement residing in that a moisture-absorption sheet is placed between said thin film EL element, and said moisture-proof sheet and said moisture-absorption sheet comprises an organic polymer sheet and silica gel powder dispersed therein in a certain surface density. The present invention also provides in a thin film electroluminescent (EL) panel comprising a light permeable base plate, a thin film EL element formed on the base plate and a moisture-proof sheet covered thereon, an improvement residing in that a moisture-absorption layer is formed on the inside surface of the moisture proof sheet by coating powder having moisture absorption properties.

Inventors

👤 Takuo Yamashita
👤 Masaru Yoshida
👤 Shigeo Nakajima
👤 Keiichi Uno
👤 Yoshiki Murakami

Bibliographic Details

Application Number —

Jurisdiction EP

Data Source google_patents

Last Synchronized 2026-10-28 17:26

CPC Classifications

H; H05; H05B; H05B33/00; H05B33/02; H05B33/04; Y; Y10; Y10S; Y10S428/00; Y10S428/917; Y10T; Y10T428/00; Y10T428/25; Y10T428/259

Claims Analysis

Total Claims: 7

Claim 1

Independent Claim 69 words

In a thin film electroluminescent (EL) panel comprising a light permeable base plate, a thin film EL element formed on the base plate and a moisture-proof sheet covered thereon, an improvement residing in that a moisture-absorption sheet is placed between said thin film EL element and said moisture-proof sheet, and said moisture-absorption sheet comprises an organic polymer sheet and silica gel powder dispersed therein in a certain surface density.

Claim 2

Dependent Claim 69 words

Claim 3

Dependent Claim 38 words

The thin film EL panel according to Claim 1 wherein said moisture absorption sheet has a thickness of 0.01 to 1 mm and said silica gel powder is dispersed in a surface density of 10 to 500 g/m².

Claim 4

Dependent Claim 53 words

In a thin film EL panel comprising a light permeable base plate, a thin film EL element formed on the base plate and a moisture-proof sheet covered thereon, an improvement residing in that a moisture-absorption layer is formed on the inside surface of the moisture-proof sheet by coating powder having moisture absorption properties.

Claim 5

Dependent Claim 53 words

Claim 6

Dependent Claim 25 words

The thin film EL panel according to Claim 3 wherein said powder is silica and dispersed in a surface density of 10 to 500 g/m².

Claim 7

Dependent Claim 27 words

The thin film EL panel according to Claim 1 or Claim 3 wherein said moisture absorption sheet or moisture absorption layer is colored black on near black.

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