Flexible electroluminescent devices and systems

• US 8,339,040 B2
• Filed: 12/18/2008
• Issued: 12/25/2012
• Est. Priority Date: 12/18/2007
• Status: Active Grant

• Current Assignee: Lumimove, Inc.
• Original Assignee: Lumimove, Inc.
• Inventors: Pinto, Mauricio, Haley, Shane, Bruton, Eric A.
• Primary Examiner(s): Patel, Ashok
• Application Number:
  US12/316,969
• Publication Number:
  US 20090212690A1
• Time in Patent Office: 1,468 Days
• Field of Search: None
• US Class Current: 313/511
• CPC Class Codes: C09K 11/025 non-luminescent particle coatings or suspension media
• CPC Class Codes: H05B 33/20 characterised by the chemical or physical composition or the arrangement of the material in which the electroluminescent material is embedded
• CPC Class Codes: H05B 33/22 characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers

Abstract

An electroluminescent device is provided. The electroluminescent device includes an intrinsically conductive polymer layer having a thickness of from about 0.1 to about 3 microns and an elongation less than about 100%; and a phosphor layer having a thickness from about 20 microns to about 70 microns. The electroluminescent device demonstrates a loss of brightness of less than about 10% after undergoing repeated creasing, crushing, flexing, twisting, abrading, and/or stretching.

Claims

1. An electroluminescent device comprising:

a substrate layer;

a rear electrode layer;

a dielectric layer;

a phosphor layer having a thickness from about 20 microns to about 70 microns; and

an intrinsically conductive layer comprising an intrinsically conductive polymer, wherein the intrinsically conductive layer has a thickness of from about 0.3 to about 5 microns and an elongation less than about 100%.

2. The electroluminescent device according to claim 1, wherein the intrinsically conductive layer comprises one or more of acid doped polyaniline, acid doped poly(ethylenedioxythiophene), and acid doped polypyrrol.

3. The electroluminescent device according to claim 1, wherein the phosphor layer includes one or more phosphors selected from one or more of complexes of calcium, strontium, barium, zinc, cadmium and mercury with one or more of sulfur or selenium.

4. The electroluminescent device according to claim 1, wherein the phosphor layer includes phosphor particles having a diameter of from about 20 to about 40 microns.

5. The electroluminescent device according to claim 1, wherein the rear electrode layer, the dielectric layer, the phosphor layer, and the intrinsically conductive layer each further comprises an independently selected binder.

6. The electroluminescent device according to claim 5, wherein the binder in the rear electrode layer, the dielectric layer, the phosphor layer, and the intrinsically conductive layer is independently selected from one or more of olefinic rubbers, copolymers of butadiene and isoprene with ethylenically unsaturated monomers, copolymers of diene monomers, silicone rubbers, homopolymers, random copolymers, and block and graft copolymers of ethylene oxide, thermoplastic polyurethane rubbers, thermoplastic olefinic rubbers, and acrylate and methacrylate end-capped oligomers.

7. The electroluminescent device according to claim 1, wherein the intrinsically conductive layer has a resistance of from about 5 Q/□

to about 3000 Q/□

.

8. The electroluminescent device according to claim 1, wherein at least one of the rear electrode layer, the dielectric layer, the phosphor layer, and the intrinsically conductive layer is UV-cured.

9. The electroluminescent device according to claim 1, wherein the rear electrode layer, the dielectric layer, the phosphor layer, and the intrinsically conductive layer is each UV-cured.

10. An electroluminescent device comprising:

a substrate layer;

a rear electrode layer;

a dielectric layer;

a phosphor layer; and

an intrinsically conductive layer;

wherein each of the rear electrode layer, the dielectric layer, the phosphor layer and the intrinsically conductive layer comprise a binder of rubber.

11. The electroluminescent device according to claim 10, wherein at least one of the rear electrode layer, the dielectric layer, the phosphor layer and the intrinsically conductive layer comprises a binder that is distinct from the binder in at least one of the rear electrode layer, the dielectric layer, the phosphor layer and the intrinsically conductive layer.

12. The electroluminescent device according to claim 10, wherein the binder for each of the rear electrode layer, the dielectric layer, the phosphor layer and the intrinsically conductive layer is independently selected from one or more of olefinic rubbers, copolymers of butadiene and isoprene with ethylenically unsaturated monomers, copolymers of diene monomers, silicone rubbers, homopolymers, random copolymers, and block and graft copolymers of ethylene oxide, thermoplastic polyurethane rubbers, thermoplastic olefinic rubbers, and acrylate and methacrylate end-capped oligomers.