Flexible electroluminescent devices and systems
First Claim
1. A flexible electroluminescent device comprising a dielectric layer including a pigment and a binder, wherein the pigment to volume concentration is greater than the critical pigment volume concentration.
1 Assignment
0 Petitions
Accused Products
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.
112 Citations
23 Claims
- 1. A flexible electroluminescent device comprising a dielectric layer including a pigment and a binder, wherein the pigment to volume concentration is greater than the critical pigment volume concentration.
-
8. An electroluminescent device comprising:
-
a substrate; a rear electrode; a dielectric layer; a phosphor layer having a thickness from about 20 microns to about 70 microns; and an intrinsically conductive polymer layer having a thickness of from about 0.3 to about 5 microns and an elongation less than about 100%; wherein the electroluminescent device demonstrates a loss of brightness of less than about 10% after undergoing repeated creasing, crushing, flexing, twisting, abrading, and/or stretching. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. An electroluminescent device comprising:
-
a substrate; a rear electrode; a dielectric layer; a phosphor layer; and an intrinsically conductive layer; wherein each layer has a different individual elongation break point and layers with longer elongation break points support adjacent layers such that the device substantially maintains brightness after undergoing mechanical stress. - View Dependent Claims (18, 20, 21, 22)
-
-
19. A flexible electroluminescent device comprising a rear electrode layer, a dielectric layer, a phosphor layer, a conductive layer comprising a conductive polymer, and a front electrode, wherein:
-
the dielectric layer includes a pigment and a polymer, wherein the pigment to volume concentration is greater than the critical pigment volume concentration; the conductive layer has a thickness of from about 0.3 to about 5 microns and an elongation less than about 100%; the phosphor layer has a thickness from about 20 microns to about 70 microns; and wherein each layer has a different individual elongation break point and layers with longer elongation break points support adjacent layers such that the device substantially maintains brightness after undergoing mechanical stress.
-
-
23. A method of making a flexible electroluminescent device, the method comprising:
-
depositing a flexible rear electrode layer on a flexible substrate; depositing a flexible dielectric layer adjacent the rear electrode and opposite the substrate, wherein the dielectric layer includes at least a binder and a pigment and wherein the pigment to volume ratio is greater than the critical pigment volume concentration; depositing a flexible phosphor layer having a thickness from about 20 microns to about 75 microns adjacent the dielectric layer and opposite the rear electrode; and depositing a conductive layer having an elongation less than about 100% adjacent the phosphor layer and opposite the dielectric layer; wherein each layer has a different individual elongation break point and layers with longer elongation break points support adjacent layers such that the device substantially maintains brightness after undergoing mechanical stress.
-
Specification