Electroluminescent display having a pixel array
View Patent ↗An electroluminescent display contains an array of dynamically addressable pixels. The pixels are arranged on one side of a carrier substrate. Conductive vias in the substrate are electrically connected to each of the pixels. Each pixel consists of a bottom electrode that is coupled to a via, an electroluminescent material, and a dielectric material. A common top electrode is disposed on the dielectric material. A driver circuit conductor or connector is situated on the other side of the substrate and is electrically coupled to each of the conductive vias and to the common top electrode, so that each pixel can be individually addressed to illuminate the electroluminescent material on individual pixels.
1. An electroluminescent display, comprising:
a substrate having an array of conductive vias;
an array of pixel elements arranged on a first face of the substrate, each pixel element consisting of;
a first electrode electrically coupled to one of the conductive vias;
electroluminescent material disposed directly only on the first electrode to substantially correspond to the size and shape of the first electrode; and
a transparent or translucent dielectric material disposed directly on the electroluminescent material to substantially correspond to the size and shape of the first electrode;
a single transparent or translucent second electrode disposed directly on the dielectric material, that overlies and is common to all of the pixel elements in the array of pixel elements; and
a driver circuit situated on an opposing second face of the substrate and electrically coupled to each of the conductive vias and to the second electrode, such that each pixel element is individually addressable sufficient to illuminate the electroluminescent material on individual pixel elements.
2. The apparatus as described in claim 1 , wherein the array is a regular array.
3. The apparatus as described in claim 1 , wherein the first electrode is situated on the conductive via.
4. The apparatus as described in claim 1 , wherein the first electrode is electrically coupled to the conductive via by means of a conductive circuit trace.
5. The apparatus as described in claim 1 , wherein the driver circuit is laminated to the second face of the substrate.
6. The apparatus as described in claim 1 , further comprising a second dielectric material disposed on the first face of the substrate between the individual pixel elements.
7. An electroluminescent display, comprising:
a substrate having an array of conductive vias;
a plurality of first electrodes disposed on a first face of the substrate, and corresponding to the array of conductive vias, each of the first electrodes electrically coupled to a respective one of the conductive vias;
electroluminescent pixels corresponding to the plurality of first electrodes, wherein one electroluminescent pixel is disposed on each of the first electrodes;
a transparent or translucent dielectric material disposed on each of the plurality of electroluminescent pixels;
a transparent or translucent second electrode disposed directly on the dielectric material, that overlies and is common to all of the plurality of first electrodes; and
a driver circuit conductor situated on a second face of the substrate and electrically coupled to each of the conductive vias and to the common second electrode, such that each of the plurality of first electrodes is individually addressable to illuminate individual electroluminescent pixels.
8. The apparatus as described in claim 7 , wherein the array is a regular array.
9. The apparatus as described in claim 7 , wherein the first electrode is situated on the conductive via.
10. The apparatus as described in claim 7 , wherein the first electrode is electrically coupled to the conductive via by means of a conductive circuit trace.
11. The apparatus as described in claim 7 , wherein the driver circuit is laminated to the second face of the substrate.
12. The apparatus as described in claim 7 , further comprising a second dielectric material situated on the first face of the substrate and surrounding the first electrodes.
13. An electroluminescent display, comprising:
a substrate having an array of conductive vias;
an array of pixel elements arranged on a first face of the substrate, each pixel element consisting of;
a first electrode electrically coupled to one of the conductive vias;
a common dielectric material disposed on the first electrode;
electroluminescent material disposed on the dielectric material; and
a transparent or translucent second electrode disposed directly on the electroluminescent material, that overlies and is common to all of the pixels elements in the array of pixel elements; and
a driver circuit situated on an opposing second face of the substrate and electrically coupled to each of the conductive vias and to the second electrode, such that each pixel element is individually addressable sufficient to illuminate the electroluminescent material on individual pixels elements.
14. The apparatus as described in claim 13 , wherein the electroluminescent material covers the dielectric material and portions of the substrate.
15. The apparatus as described in claim 13 , wherein the array is a regular array.
16. The apparatus as described in claim 13 , wherein the first electrode is situated on the conductive via.
17. The apparatus as described in claim 13 , wherein the first electrode is electrically coupled to the conductive via by means of a conductive circuit trace.
18. The apparatus as described in claim 13 , wherein the driver circuit is laminated to the second face of the substrate.
19. An electroluminescent display, comprising:
a substrate having an array of conductive vias;
a plurality of first electrodes disposed on a first face of the substrate, and corresponding to the array of conductive vias, each of the first electrodes electrically coupled to a respective one of the conductive vias;
a common dielectric material disposed on each of the plurality of first electrodes;
an electroluminescent material disposed on the dielectric material and corresponding substantially to the size and shape of each of the plurality of first electrodes;
a transparent or translucent common second electrode disposed on the electroluminescent material that overlies and is common to all of the plurality of first electrodes; and
a driver circuit conductor situated on a second face of the substrate and electrically coupled to each of the conductive vias and to the common second electrode, such that each of the plurality of first electrodes is individually addressable to illuminate individual electroluminescent pixels.
20. The apparatus as described in claim 19 , wherein the array is a regular array.
21. The apparatus as described in claim 19 , wherein the first electrode is situated on the conductive via.
22. The apparatus as described in claim 19 , wherein the first electrode is electrically coupled to the conductive via by means of a conductive circuit trace.
23. The apparatus as described in claim 19 , wherein the driver circuit is laminated to the second face of the substrate.
24. The apparatus as described in claim 19 , further comprising a second dielectric material situated on the first face of the substrate and surrounding the first electrodes.