# US 7,411,345 B2 · Organic electroluminescent display having desiccant layer including at least one hole

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- Number: US 7,411,345 B2
- Document ID: US7411345B2
- Status: Granted
- Kind: B2
- Application number: 10/989,022
- Filed: 2004-11-16
- Published: 2005-05-19
- Granted: 2008-08-12
- Earliest claimed: 2003-11-17
- Assignees: Samsung SDI Co., Ltd.
- Inventors: Ho-Seok Lee; Won-Kyu Choe
- Web page: https://patentgrep.com/patent/US7411345B2

## CPC

- H10K 59/871: {Self-supporting sealing arrangements}
- H10K 59/874: {including getter material or desiccant}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

In particular, one embodiment of the present invention provides an organic electroluminescent display which comprises a light emitting device formed on a lower insulating substrate, and an upper substrate mounted to encapsulate the light emitting device, wherein the upper substrate is provided with a desiccant, the desiccant being formed with at least one hole passing through the desiccant.

## Claims

### Claim 1

An organic electroluminescent display, comprising:
a light emitting device formed on a lower insulating substrate; and
an upper substrate mounted to encapsulate the light emitting device,
wherein the upper substrate is provided with a desiccant, the desiccant being formed with a plurality of holes passing through the desiccant, the at least one hole having a circular shape and a diameter of more than 1 mm.

### Claim 2 (depends on 1)

The organic electroluminescent display as claimed in claim 1, wherein the upper substrate is provided with a desiccant placing recess.

### Claim 3 (depends on 2)

The organic electroluminescent display as claimed in claim 2, wherein the depth of the desiccant placing recess is less than 350 μm.

### Claim 4 (depends on 1)

The organic electroluminescent display as claimed in claim 1, wherein the hole of the desiccant prevents bubbles from forming while the desiccant is adhered.

### Claim 5 (depends on 1)

The organic electroluminescent display as claimed in claim 1, wherein the holes occupy an area of less than 6% of the whole area of the desiccant.

### Claim 6 (depends on 5)

The organic electroluminescent display as claimed in claim 5, wherein the holes occupy an area of 1% to 6% of the whole area of the desiccant.

### Claim 7 (depends on 1)

The organic electroluminescent display as claimed in claim 1, wherein the number of the holes is between 13,000/m2 and 20,000/m2.

### Claim 8 (depends on 1)

The organic electroluminescent display as claimed in claim 1, wherein the desiccant is provided with at least one hole per 1 cm2.

### Claim 9 (depends on 1)

The organic electroluminescent display as claimed in claim 1, wherein the desiccant is composed of a desiccant material layer and an adhesive material layer, the adhesive material layer being employed to fix the desiccant onto the upper substrate.

### Claim 10 (depends on 9)

The organic electroluminescent display as claimed in claim 9, wherein the desiccant material layer is composed of at least one material selected from a group consisting of barium oxide (BaO), calcium carbonate (CaCO3), calcium oxide (CaO3), phosphor oxide (P2O5), Zeolite, Silicagel, and Alumina.

### Claim 11 (depends on 9)

The organic electroluminescent display as claimed in claim 9, wherein the desiccant material layer has a thickness of less than 200 μm.

### Claim 12

An organic electroluminescent display, comprising:
a light emitting device formed on a lower insulating substrate; and
an upper substrate mounted to encapsulate the light emitting device, wherein the upper substrate is provided with a desiccant, the desiccant being formed with a plurality of holes passing through the desiccant and each hole of the desiccant has a diameter of 1 mm to 2 mm.

### Claim 13

An organic electroluminescent display, comprising:
a light emitting device formed on a lower insulating substrate;
an upper substrate mounted to encapsulate the light emitting device; and
a desiccant comprising a desiccant material layer and an adhesive material layer, the adhesive material layer fixing the desiccant material layer onto the upper substrate,
wherein at least one hole passes through the desiccant material layer and the adhesive material layer and exposes a surface of the upper substrate, and
wherein the holes occupy an area of less than 6% of the whole area of the desiccant.

### Claim 14 (depends on 13)

The organic electroluminescent display as claimed in claim 13, wherein the desiccant is provided with at least one hole per 1 cm2.

### Claim 15 (depends on 13)

The organic electroluminescent display as claimed in claim 13, wherein the hole of the desiccant has a triangular shapes.

### Claim 16 (depends on 13)

The organic electroluminescent display as claimed in claim 13, wherein the desiccant material layer has a thickness of less than 200 μm.