Technical / Research - Page 112

Financial terms of the agreement have not been disclosed; however, as is customary with these agreements, Universal Display will recognize commercial chemical sales and license fee revenues from its supply of materials to LG.Philips LCD.  The term of the agreement runs through June 30, 2008.

LG.Philips LCD has long been a leader in LCD display products, and we are excited to be part of their plans for the production of AMOLED display products for the commercial market, said Steven V. Abramson, President and Chief Operating Officer of Universal Display. This new agreement with LG.Philips LCD illustrates the acceptance of our phosphorescent OLED technology and materials by the display industry for thinner, energy-efficient commercial OLED displays.

LG.Philips LCD is currently focused on introducing small and medium-sized OLED panel applications. The relationship between LG.Philips LCD and Universal Display most recently yielded the world’s first high-resolution AMOLED display built on flexible metal foil utilizing Universal Display’s proprietary high-efficiency PHOLED and FOLED® flexible technologies.

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.

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.

The US Department of Energy (DoE) has selected eight solid-state lighting (SSL) research and product development projects that will receive total funding of $13.3 million.

LG.Philips LCD has announced that it has developed (in cooperation with UDC.) the first full-color flexible AMOLED display that uses amorphous silicon (a-Si) technology.

The 4-inch full-color flexible AM OLED display features 320×240 QVGA resolution and can reproduce 16.77 million colors. It uses a stainless metal foil substrate to ensure durability and protection against heat, which improves the manufacturing process and enhances product stability, noted LG.Philips LCD.

Using a-Si backplane technology allows LG.Philips LCD to use its existing TFT LCD production line for these AM OLEDs, a major step toward demonstrating the commercial viability of such products. LG.Philips LCD will unveil the full-color flexible AM OLED display at SID 2007 in the US on May 20.

Read more here (Digitimes)

Intersil Corporation today announces the release of the ISL97701. By combining high current output, an integrated Schottky diode and fault protection, Intersil provides the industry's most complete boost regulation solution for passive matrix OLEDs. With efficiency up to 87%, the ISL97701 can deliver 50mA of output current at 18V. It can provide up to 28V output, enabling power efficient operations in MP3, portable media players, automotive clustering, and low-end cell phones PMOLED displays. ISL97701 is also suitable for standard boost regulation applications such as WiMax card and LCD bias generator power applications.

The integration of the Schottky diode reduces the BOM cost and saves board space, while an integrated input disconnect switch protects the device against overcurrent, overvoltage and over temperature. The ISL97701 is highly versatile with a variable output that can be set by external resistors to match the needs of the application. At just 3mm x 3mm x 0.9mm, its 10-lead DFN (Pb free) package is a very compact power management IC for portable applications.

Ross Young, DisplaySearch's President and Founder says -

The technology behind this product is small molecule OLED material and a CMOS LTPS backplane produced at their joint venture with Toyoda. The red material is the highly efficient phosphorscent type from UDC fabricated by PPG. The blue is likely from Idemitsu Kosan. It is a top emission design which improves brightness, but it also uses a color filter which lowers brightness and makes it even more costly. They went with the color filter along with the RGB OLED materials to meet their color gamut requirements.

Samsung SDI, which has a more recent design, is able to achieve the same color gamut without the color filter. We would expect Sony’s next design to either exclude the color filter or go with white OLED material and maintain the color filter which would be bad news for UDC unless they went with UDC’s white material.

OLED-T today announced a new patented host material for OLED displays that delivers significant performance benefits compared with existing materials. The host layer is a crucial layer in the make-up of an OLED display as it impacts its performance including efficiency and lifetime. The new OLED-T material, called E746, is targeted as a direct replacement and upgrade path for aluminium quinolate (Alq3), the host material most commonly used throughout the OLED industry.

OLED-T has developed E746 for OLED displays in the mobile market such as mobile phones and digital cameras where its power consumption and lifetime performance benefits are expected to deliver improved product performance.

In fluorescent red and fluorescent green customer OLED display devices, OLED-T’s E746 material outperforms Alq3 in terms of energy efficiency, colour co-ordinates, lifetimes and voltage drift. E746 enables OLED displays to be manufactured with a current efficiency increase of between 30% and 50%, a power efficiency improvement of as much as 45 to 80 per cent and a lifetime increase of 100 per cent for fluorescent red and 200 per cent for fluorescent green.