OLED Lifetime: introduction and market status - Page 26

DuPont announced a significant technology breakthrough in its OLED technology, taking a significant step toward commercialization of this next generation flat panel display offering. Using advanced materials, OLEDs produce low power, thin, high-performance flat panel displays. OLED panels are emissive, eliminating the need for backlights and simplifying display design compared to other display technologies, such as liquid crystal displays (LCDs).

DuPont has achieved lifetimes of the three primary colors each exceeding 10,000 hours of white lifetime (or 40,000 hours for a typical video) at the brightnesses required for a 200 nit display. With this development, DuPont has demonstrated that OLEDs can be manufactured at high yields and low total cost.

With 13 of the 70 technical sessions at the Symposium, OLEDs represent the largest single technology concentration at SID 2006. Sessions will focus on OLED device structures, active-matrix (AM) OLEDs, OLED manufacturing, materials, and blue-emitting OLEDs. Notable OLED papers will cover flexible AMOLEDs on stainless-steel substrates (one paper each by Samsung SDI and Universal Display Corp.), and white OLEDs (Novaled GmbH).

CDT welcomes the announcement by Sumation - its joint venture partner with Sumitomo Chemical - of rapid progress in the development of long lifetime, high efficiency light emitting polymers for full color, video capable PLED displays.

Following a previous announcement in December, CDT now reports the achievement of blue fluorescent devices (CIEx=0.14, y=0.21) with 12,500 hours lifetime(1) from an initial luminance of 400 cd/m², and an efficiency of 9cd/A.

Sidney Rosenblatt, Chief Financial Officer of Universal Display Corporation, in a presentation titled "Changing the Display Landscape through Phosphorescent OLEDs," will announce the achievement of key technological milestones in the Company's development of blue PHOLED materials and technology. Universal Display's new blue PHOLED system with sky blue color of CIE (0.16, 0.37) now offers luminous efficiency of 20 candelas per ampere (cd/A) and 100,000 hours of operating lifetime at 200 candelas per square meter (cd/m2). This follows the Company's breakthrough announcement in June, 2005 of a sky blue PHOLED with over 15,000 hours at 200 cd/m2. That was the first significant blue PHOLED to break through the 1,000 hour lifetime barrier.

The Company has also made significant progress in the demonstration of deeper blue performance. Mr. Rosenblatt will present a proprietary new blue PHOLED with CIE (0.16, 0.29), excellent luminous efficiency of 21 cd/A and over 17,500 hours of operating lifetime at 200 cd/m2. This corresponds to over 3,000 hours at 500 cd/m2, a target luminance for commercial applications.

OSRAM Opto Semiconductors today announced the newest addition to its Pictiva(TM) line of OLED graphic display products. The company's new 2.7-inch, 128x64 dot display is the company's solution to offering a lifetime of 55,000 hours.

In addition to an ultra-wide, 180-degree viewing angle, 2000:1 contrast ratio, rapid video response capabilities and a thin profile, the new 128x64 pixel graphics Pictiva display is an industry-standard 2.7 inches, enabling excellent readability and presentation of graphic and text images. Pricing for the Pictiva OLED display is comparable with LCD screens, yet Pictiva OLED displays offer increased performance, enhanced features and a long life.

OSRAM's new 128x64, 2.7-inch Pictiva OLED display is currently available for $19.50 in 1,000-unit quantities.

Mitsubishi Chemical today announced that it has developed an Organic Light-Emitting Diode device with the highest efficiency in the world in its new blue phosphorescence OLED material.

The new OLED material, which can be produced by a lower-cost, wet-coating process, is expected to open the way to the development of a new class of large flat-panel displays.

The newly developed OLED device employs MCC's own blue phosphorescence host material (wet-coating type), hole blocking material, and hole injection material to optimize the design of a device to achieve the current efficiency of 30 cd/A at the intensity of 100 cd/m2 (external quantum efficiency: 13%), more than twice that of conventional blue wet-coating type OLEDs.

Cambridge Display Technology (CDT) announces two major milestones in the development of long lifetime, high efficiency light emitting polymers for full color, video capable displays.

A phosphorescent red device has been produced by CDT and Sumitomo Chemical which has a lifetime of half a million hours from an initial luminance of 100cd/m(2); this is a record for lifetime of solution-processable materials of any color. The efficiency is also improved at over 7cd/A. Red efficiency is especially important as this color consumes the largest share of power input in a color device, so improvements in red efficiency have important practical implications.

CDT announced a red dendrimer OLED device with a 250,000-hour lifetime from an initial luminance of 100cd/m2, compared to the 150,000 hour-lifetime device announced this May and 15,000 hour lifetime in 2004. The company also said it will ally with Sumitomo Chemical for PLED material supply.

Lifetimes for devices using dendrimer technology using the new red materials at 400cd/m², 800cd/m² and 1000cd/m² are estimated at 15,600 hours, 3,900 hours and 2,500 hours respectively.

OLED company Novaled GmbH has developed a red top emission OLED that produces 10 lumens per watt at 500 candelas per square meter, with a projected lifetime of more than 100,000 hours.

According to Novaled, the OLED achieves a breakthrough by combining the highest power efficiency and longest lifetime for a top emission OLED, using transport layer doping technology. The part uses a red phosphorescent emitter from Covian Organic Semiconductors GmbH with molecular dopant materials from Novaled.

Universal Display Corporation announced a fundamental technical achievement in the development of its blue PHOLED phosphorescent OLED technology: a sky blue PHOLED with over 15,000 hours of operating lifetime. This is the first blue PHOLED which has broken through, by an order of magnitude, the 1,000 hour lifetime barrier - a challenge that some people thought might be insurmountable. The announcement was made today at Universal Display's annual shareholders' meeting, held in Philadelphia, PA.

The Company's proprietary blue PHOLED demonstrates a lifetime that exceeds 15,000 hours at 200 cd/m2, and also offers excellent efficiency, a trait for which the Company's PHOLED technology is renowned, with 9.5% external quantum efficiency and 22 cd/A luminous efficiency. With CIE coordinates of (0.16, 0.37) and a 474 nm peak emission wavelength, which is equivalent to a sky blue color, this material system is not yet saturated enough for commercial full-color applications.

Earlier this year, Universal Display had disclosed a deep blue PHOLED. The Company is now continuing its research efforts to unify the deep blue color, efficiency and lifetime in one system to meet the needs of the commercial OLED market.