Technical / Research - Page 119

CDT has entered new geographical territory with the sale of inkjet printing equipment to the Genius Institute of Technology in Brazil. The Institute will use the equipment to develop its expertise in inkjet printing for polymer organic light emitting diode (PLED) technology.

The Litrex 70 printer is capable of printing on substrates up to 200 mm square at up to 120 pixels per inch, and is ideal for research and development of PLED materials and devices.

The company said it had developed a lighting device using organic light-emitting diode (OLED) technology, a potential new driver of earnings growth.
A Konica Minolta spokesman said it planned to launch the product in the next business year from April 2007, and aimed to generate 20 billion yen ($175 million) in sales from the new business in the year through March 2011.
OLED has primarily been seen as a promising technology for next-generation flat panel displays because OLED screens can produce bright, colourful images visible from a wide viewing angle without consuming a lot of power. But Konica Minolta said it would use the technology to create a device that could be used to illuminate offices and homes. Its new device emits white light at 64 lumens per watt, roughly on par with conventional fluorescent lights.
The new device can last 10,000 hours before its brightness level is cut in half, similar to fluorescent lighting, the spokesman said.
OLEDs are typically built on glass but can also be made on flexible substrates. This could allow for the development of bendable lighting.

The U.S. Display Consortium (USDC) and National Starch and Chemical Co. (NSC, Bridgewater, N.J.) today announced that their joint R&D project on packaging technology for organic light-emitting diode (OLED) displays has yielded commercially viable sealants and packaging adhesives. NSC has commercialized several of these products under the Eccoseal(TM) brand name within its Emerson & Cuming division, and will continue to launch products derived from the program in 2006-2007. Begun in October 2002 under a grant from the U.S. Army Research Laboratory, the contract was completed last month, with a total R&D investment of $2.21 million, cost-shared between USDC and NSC.

The contract outlined a program for developing a radiation-curable perimeter sealant for both plastic and glass OLED packages.

Cambridge Display Technology announced that it has extended its current co-operative relationship with H.C. Starck, by which the company will supply customized formulations of Starck organic materials used in PLED displays manufacture.

As per the deal with Starck, Cambridge Display said it will distribute materials solutions which it will formulate for specific ink jet printing applications.

India, despite its talent pool, has never been a global leader in technological development. Lack of investments in research and development and infrastructure have often been cited as reasons for the country lagging behind in terms of innovation and discoveries.

Things are, however, changing with the concept of partnership between the government, industry and university taking shape. In certain instances it has almost reached a stage of fructification and ready to take the global leadership position in various areas of technology.

A case in point is the prototype development unit in the Samtel Centre for Display Technologies at Indian Institute of Technology (IIT) Kanpur. The prototype unit, which was recently dedicated to the nation by Union Minister of Science and Technology Kapil Sibal, is set to become the nursery for India's quest to be leaders in the Organic Light Emitting Diodes (OLEDs), which are now finding increasing usages as full colour displays in applications such as digital cameras and mobile phones.

Ron Mertens from OLED-Info.com recently had the opportunity to interview Myrddin Jones, OLED-T's new CEO.

OLED-T is engaged with research, development and commercialization of a pioneering class of OLED materials, called ELAMATES®. For more information on OLED-T, check out the corporate background and technological background documents they sent us.

Q: Myrddin, First of all, thank you for accepting to do this interview session with us... Now, obviously there are many OLED IP and material companies out there. What makes OLED-T unique? What are the advantages of your materials and IP?

OLED-T lead electron transporter material can replace existing standard materials using the same production process and offer advantages in terms of efficiency, voltage, colour and lifetime as a direct result even with no other changes in materials or structure. In addition, OLED-T has prototype display production in-house allowing optimum structures to be developed and proposed to customers. See attached technology overview.

Philips and Novaled reached a new record for the power efficiency of a white OLED, obtaining 32 lm/W with colour coordinates of 0,47/0,45 and a CRI of 88 at a brightness of 1000 cd/m2. That same device structure thereby simultaneously shows a lifetime of more than 20000 hours which is a major achievement for a future commercialization of the OLED technology for lighting applications.

The efficiency of the device was measured using an integrating sphere using only the forward emission cone of the OLED device without attaching any lens or any other volume type luminaire to the OLED device. This is the only method to reliably predict power efficiency values for large area lighting tiles.

Cambridge Display Technology and Litrex Corporation are paving the way for the production of a new generation of high resolution polymer organic light emitting displays (PLED, or P-OLED) through the development of an inkjet printing solution capable of producing PLED displays at up to 200 pixels per inch (ppi).

Cambridge Display Technology announces the sale of a sophisticated Eclipse display test system to Merck OLED Materials GmbH, based in Frankfurt, Germany. The equipment will be used to enhance productivity in the development and evaluation of materials for organic light emitting diode displays. The Eclipse system to be supplied to Merck consists of 192 digital source-measure channels and associated hardware and software, some of which has been customized for Merck's particular requirements.

Cambridge Display Technology and Toppan Printing, the leading information and communications company of Tokyo, Japan, have produced a number of 5.5 inch full color active matrix polymer OLED (PLED) displays using a roll printing method. A demonstrator will be shown at the SID conference in San Francisco. The displays - believed to be the first of their type ever produced - are the result of close co-operation between the two companies and part of their joint development activity announced in February 2005.

Solution processing of PLED (also called P-OLED) displays is more commonly associated with inkjet printing, and the companies believe that roll printing represents a promising alternative production technique which offers the potential for very good display uniformity, very high display resolution and low capital and operating costs. In the future, this type of roll printing process could be well suited for making flexible P-OLED displays. CDT believes that this combination of properties can only be achieved with solution-based printing processes.

Universal Display will unveil a new deep red PHOLED material system with excellent luminous efficiency, 15 candelas per Ampere (cd/A), that corresponds to 19% external quantum efficiency.
In addition, the Company is reporting advancements in device architecture designs that lead to significantly extended lifetimes.

The Company is also demonstrating novel device architectures that provide significant enhancements in color saturation. By comparison to yellow-green color in a standard bottom-emitting OLED structure, the same PHOLED material system offers a saturated green color, with CIE coordinates of (0.25, 0.72), in a cavity-tuned, top-emission structure. (In a bottom-emitting structure, this system offers luminous efficiency of 71 cd/A and 100,000 hours of operating lifetime at 1,000 cd/m(2).)
As will be reported, Universal Display has developed device architectures to improve the luminous efficiency of its sky blue PHOLED material by 50%, to 30 cd/A, with 100,000 hours of operating lifetime at 200 cd/m(2).

Dr. Anna Chwang will present advances in the development of a top-emitting, active-matrix OLED display built on flexible metal foil using the Company's proprietary OLED technologies. The 100 ppi QVGA OLED display is integrated onto a poly-silicon TFT backplane developed by Palo Alto Research Center (PARC).