IP Library › Granted Patent US 7,262,551
Granted Patent B2
US 7,262,551 · App. 10/518,842 · Granted Aug 28, 2007

Electroluminescent device with improved light output

Assignee: Koninklijke Philips Electronics N.V.
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Quick Facts
Patent No.
US 7,262,551
App. No.
10/518,842
Granted
Aug 28, 2007
Kind
B2
Abstract

The invention relates to an electroluminescent device comprising a substrate ( 1 ) and a laminated body composed of a first electrode ( 3 ), an electroluminescent layer ( 4 ) and a second electrode ( 5 ). The light output out of the electroluminescent device is increased by arranging a colloidal layer ( 2 ) between the substrate ( 1 ) and the laminated body. By using pigments in the colloidal layer ( 2 ), the emmission color of the electroluminescent device can be changed and the daylight contrast improved.

Claims (7)

1. An electroluminescent device comprising:

a substrate,

a colloidal layer, and

a laminated body composed of a first electrode, an electroluminescent layer and a second electrode, wherein

the colloidal layer has a varying refractive index.

2. An electroluminescent device as claimed in claim 1 , wherein the colloidal layer borders on the substrate, and the laminated body borders on the colloidal layer.

3. The electroluminescent device of claim 1 , wherein the colloidal layer contains pigments.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 17, 2007
From: KONINKLIJKE PHILIPS ELECTRONICS N.V.
To: NXP B.V.
Reel/Frame 019719/0843 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 21, 2004
From: BUCHTEL, HELMUT HANS; BUSSELT, WOLFGANG; OPITZ, JOACHIM; KLEIN, MARKUS HEINRICH; BERTRAM, DIETRICH; GLASER, HARALD
To: KONINKLIJKE PHILIPS ELECTRONICS N.V.
Reel/Frame 016619/0193 →
Priority Claims (1)
DE 102 28 937 · Jun 28, 2002 · national
Continuity (1)
Related Publication 20050206311A1 · Sep 22, 2005