Organic EL panel and filter for same

• US 6,706,425 B2
• Filed: 03/27/2003
• Issued: 03/16/2004
• Est. Priority Date: 07/21/1999
• Status: Expired due to Term

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: NEC Corporation
• Inventors: Sakaguchi, Yoshikazu, Ishii, Ikuko
• Primary Examiner(s): Kelly, Cynthia H.
• Assistant Examiner(s): Garrett, Dawn
• Application Number:
  US10/400,862
• Publication Number:
  US 20030203235A1
• Time in Patent Office: 355 Days
• Field of Search: 428/690, 428/917, 257/98, 313/512, 313/504, 313/506
• US Class Current: 428/690
• CPC Class Codes: G02B 5/3033 in the form of a thin sheet or foil, e.g. Polaroid
• CPC Class Codes: H10K 50/86 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: H10K 59/8791 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: Y10S 428/917 Electroluminescent
• CPC Class Codes: Y10T 428/31504 Composite [nonstructural laminate]

Abstract

In a filter for an organic EL panel formed by a quarter-wave layer (λ/4 plate), a polarizing layer and an anti-glare layer, the polarization of the polarizing layer is between 50% and 70%, and the haze value of the anti-glare layer is between 5% and 15%.

Claims

1. An organic electroluminescent (EL) panel comprising;

an organic electroluminescent element;

a quarter-wave plate disposed adjacent said organic electroluminescent element;

a polarizing layer providing substantially between 50% and 70% polarization disposed adjacent said quarter-wave plate; and

an anti-glare layer disposed adjacent said polarizing layer.

2. An organic electroluminescent (EL) panel as claim ed in claim 1, wherein said anti-glare layer has a haze value between 5% and 15%, according to the JIS K7105 standard.

3. An organic electroluminescent (EL) panel as claim ed in claim 1, further comprising a glass substrate disposed between said organic electroluminescent element and said quarter-wave plate;

wherein said quarter-wave plate is laminated onto said glass substrate.

4. An organic electroluminescent (EL) panel as claim ed in claim 1, wherein said polarizing layer is laminated onto said quarter-wave plate.

5. An organic electroluminescent (EL) panel comprising;

an organic electroluminescent element;

a glass substrate disposed adjacent said organic electroluminescent element;

a polarizing layer providing substantially between 50% and 70% polarization, wherein said polarizing layer is laminated onto said glass substrate; and

a quarter-wave plate laminated onto said polarizing layer.