Maro Publications

Light Emitting Diodes (LED)

Patents with Abstracts

from 6/18/2012

Maro Topics


Patents with Abstracts

5. 8,512,870 
Transparent resin for encapsulation material and electronic device including the same

A light emitting element such as a light emitting diode (LED), an organic light emitting diode (OLED) device, a photoluminescent (PL) device, and the like may be used in diverse areas, such as a domestic electric device, a lighting device, a display device, various automatic devices, and the like.

Shin et al of Cheil Industries, South Korea,  developed a transparent resin for an encapsulating LEDs based on a polymetallosiloxane from at least metal compounds. 

(RDC 8/26/2013)

4. Light Emitting Polymers

U.S. Patent 8,487,055 (July 16, 2013), “Hole Transport Polymers,” Nora Sabina Radu, Gene M. Rossi, Eric Maurice Smith, Yulong Shen, Weiying Gao, Reid John Chesterfield, Jeffrey A Merlo, Daniel David Lecloux, and Frederick P. Gentry (E I du Pont de Nemours and Company, Wilmington, Delaware, USA).

In organic photoactive electronic devices, such as light emitting diodes, an active organic layer is sandwiched between two electrodes.  This material, then, emits light by an electrical voltage.  There is a continuing need for improved charge transport materials for these diodes.  Radu et al developed an improved material based on aromatic chains containing alkyl, fluoroalkyl, aryl, fluoroaryl, alkoxy, aryloxy and crosslinkable groups.  The polymer chains are produced by the Yamamoto polymerization using zero-valent nickel compounds.  A crosslinkable film is formed between two electrodes.  After fabrication the film is cured by heat or radiation to form a more robust, less soluble film for the light emitting diode.


3. 8,282,861 
Electrically conductive polymer compositions 
Hsu et al, Delaware, developed electrically conductive consisting of, either (1) a deuterated electrically conductive polymer doped with a highly-fluorinated acid polymer; or (2) (a) a deuterated electrically conductive polymer doped with a non-fluorinated polymeric acid and (b) at least one highly-fluorinated acid polymer. Applications included light emitting diodes, photodetectors, photovoltaic devices and transistors. (RDC 10/15/2012)

2. 8,193,015 
Method of forming a light-emitting-diode array with polymer between light emitting devices
Hornig, Lu and Liu of Pinecone Energies, Virgin Island, formed a light-emitting-diode (LED) array on a substrate.  The LED structure is divided into at least a first LED device and a second LED device with a gap between the first LED device and the second LED device. At least one polymer material is deposited over the LED structure to substantially fill the gap with the at least one polymer material. Portions of the at least one polymer material are removed to expose a first electrode of the first LED device and a second electrode of the second LED device. An interconnect is formed on top of the at least one polymer material electrically connecting the first and second electrode. (RDC 6/26/2012)

1. 8,192,051 
Bidirectional LED light sheet
Dau, Lerman and York of Quarkstar, Nevada, developed a bidirectional light sheet including at least a first and second array of bare LED chips with top and bottom electrodes, where the arrays of LEDs are sandwiched between at least two transparent substrates having conductors bonded to the electrodes without wires to form the light sheet. The LEDs of the array are arranged within the light sheets to emit light from opposite surfaces of the light sheet to create a bidirectional light sheet. The bidirectional light sheet is suspended from a ceiling to be non-parallel to the ceiling. (RDC 6/18/2012)


Bookmark this page to follow future developments!.
(RDC 6/5/2012)


Roger D. Corneliussen

Maro Polymer Links
Tel: 610 363 9920
Fax: 610 363 9921


Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen

** Date of latest addition; date of first entry is 6/18/2012.