Universal Display's Dr. Brian W. D'Andrade, Senior Scientist, presented the WOLED advances at White OLED I session with a paper titled "Efficient White Phosphorescent Organic Light-Emitting Devices." Dr. D'Andrade discussed a novel white OLED structure with an external quantum efficiency (EQE) of 20%, corresponding to a luminous efficiency of 33 cd/A. With CIE coordinates of (0.38, 0.39) and operating lifetime exceeding 4,000 hours at 1,000 cd/m(2). This is believed to be the highest EQE reported to date, for a single, non-stacked WOLED. Dr. D'Andrade also reported on the use of outcoupling enhancements to further increase the EQE to 37%. Outcoupling refers to the portion of light generated in the device that can be extracted from the device as useable light.

eMagin Corporation will demonstrate the latest innovations in power-efficient microdisplays, its prototype SVGA-3DS microdisplay, at this year’s Society for Information Display Conference and Exhibition. Located in Booth 1717 at the Long Beach Convention Center, eMagin will also demonstrate a number of applications for personal display systems based on its OLED microdisplays and modules.

With first prototype units already in the hands of developers, the SVGA-3DS microdisplay offers both analog and digital signal processing in a compact display (0.44-inch) with greater power efficiency. This high-density OLED-on-silicon microdisplay promises an affordable, easy-to-integrate solution for many virtual imaging systems. eMagin’s SVGA-3DS microdisplays eliminate the need for extra circuitry and components while allowing for a smaller display module design with increased functionality, with no increase in power consumption.

Specific improvements include increased pixel uniformity, improved color gamut, on-chip temperature sensor and compensation, and compatibility with both analog RGB and digital video signals. The 800 x 600-pixel array comprises triads of vertical sub-pixels stacked side by side to make up each 11.1 x 11.1-micrometer color pixel. Versatile timing controls accommodate a variety of video formats. On-board circuitry ensures consistent color and brightness over a wide range of operating temperatures.

Built on eMagin’s original active matrix SVGA-3D and SVGA+ integrated circuits, the current OLED-XL displays typically demonstrate 4X improvements in efficiency of eMagin’s original products. This gain in efficiency enables the OLED-XL microdisplays to provide significantly higher luminance at levels power consumption equivalent to those required by the first and second generation products.

Universal Display Corporation today unveiled a new, deep red PHOLED material at the Society for Information Display's (SID) 2007 International Symposium, Seminar and Exhibition in Long Beach, California. The Company's continued advances in high-efficiency PHOLED materials and technology are leading the way for the next generation of OLED displays for TV's and other demanding product applications.

To specify chromaticity of the three primary colors in a display, two color space standards are commonly used. They are the National Television Standards Committee (NTSC) standard, originally developed for televisions, and the more recent s-RGB color space standard established for monitors, printers and the Internet. UDC-RD26 is designed to match the deep red, NTSC chromaticity standard, while UDC-RD39 meets the bright red, s-RGB specification. Depending on the specific display application, manufacturers may prefer either a deep red color or a brighter red color with higher intrinsic luminous efficiency.

Universal Display's new UDC-RD26, with CIE coordinates of (0.67, 0.33) can operate at a luminous efficiency of 19 candelas per Ampere (cd/A), corresponding to an 18% external quantum efficiency, at 1,000 candelas per square meter (cd/m2). Under accelerated testing conditions, UDC-RD26 demonstrates an operating lifetime of approximately 90,000 hours, at an initial luminance of 1,000 cd/m2. These performance gains are significant, representing an 80% increase in luminous efficiency and 10% increase in lifetime, as compared to Universal Display's first-generation commercial deep red PHOLED emitter. In addition, both new second-generation materials are specifically designed for use in high-volume production environments.

The 160 ppi three inch full color display incorporates CDT's PLED technology and was produced by CDT using a Litrex Gen 2 inkjet printer on amorphous Si TFT substrates provided by Casio. The company stated that since starting the project in fall of 2006, CDT has been able to demonstrate that it can achieve the accuracy required to produce the displays over 14-inch substrates.

The achievement of printing 160 ppi high resolution is the combination of Casio backplane design, Litrex printer droplet accuracy, CDT's know-how on ink formulation, and optimized print strategy.

According to the market research company OLEDNet on 21th, the number of OLED international patents registered, including Korea, the U.S, and Japan, by Korean companies and researchers, such as Samsung SDI and LG Electronics, is 1364 cases out of 2613 cases total, which is 52.2% of entire patents last year.

During the same period, Japan came in the 2nd place with 912 patents, which is 34.9%, followed by the U.S. with 185 cases.

Sorted by companies, Samsung SDI was No. 1 with 748 cases registered, followed by LG Electronics (270 cases), Japan`s Seiko-Epson (175 cases), Japan`s Semiconductor Energy Laboratory (SEL, 109 cases), LG.Philips LCD (96 cases) in order.

Novaled achieved unsurpassed lifetime results for top and bottom emitting red fluorescent devices. A red bottom emitting Novaled PIN OLEDTM shows a luminance drop of only 4% after 6000 hours measurement at a starting brightness of 3,700 cd/sqm. The record top emitting red PIN OLED shows a luminance drop of even only 1% after 1,000 hours measurement at a starting brightness of 12,000 cd/sqm. Both OLEDs are down calculated to more than one million hours (corresponding to one century) at starting brightness of 1,000 cd/sqm.

Novaled has also reached significant achievements for blue fluorescent PIN OLEDs: 50,000 hours at 500 cd/sqm in bottom emission answering the request of RGB Active Matrix displays.

In addition, major lifetime improvements have been shown for green phosphorescent PIN OLEDs (100,000 hours at 500 cd/sqm for Ir(ppy)3 based top emission OLEDs). With this value Novaled has doubled its performance for Ir(ppy)3 based green OLED stacks during the last twelve months. We are confident to reach one million hours lifetime with more performing phosphorescent emitting material, says Jan Blochwitz-Nimoth, CTO of the company.

Cambridge Display Technology and Sumation are pleased to announce new and improved results for green and blue PLED materials.

Data from spin coated devices using a common cathode and a recently developed solution processable green PLED material demonstrate lifetimes(1) of 50,000 hours from an initial luminance of 1000 candelas per square meter, or cd/sq.m. This is equivalent(2) to over 285,000 hours from an operating brightness of 400cd/sq.m for this material and represents a 40% increase in lifetime compared to results announced on March 27, 2007.

The OLLA project aims to demonstrate in 2008 a device with 50 lumens per watt, a lifetime of 10,000 hours at an initial brightness of 1,000 cd/m2, with a minimum tile size of 15 x 15cm.

The latest white-light OLED panel roduced by OLLA has an efficacy of 25 lumens per watt, a lifetime of over 5,000 hours from an initial brightness of 1,000 cd/m2.

OLED-T has demonstrated red, green and blue flexible single colour displays manufactured on a plastic substrate using its OLED materials. The demonstrator displays have been developed using a new family of materials developed by OLED-T that can be deposited by vacuum evaporation at manufacturing temperatures around 300oC. This relatively low temperature has enabled OLED-T to demonstrate flexible plastic OLEDs based on vacuum deposition for the first time.

OLED-T is now focussing research and development effort on encapsulation methods to improve the lifetime of its plastic devices. The lifetime of the initial demonstrator red devices was 60 hours at a luminance of 100 cdm-2 and 72 hours for green devices. The limited lifetime is due to high moisture permeability. The corresponding devices manufactured on a glass substrate have lifetimes in excess of 32,000 hours for the same device structure.