Lifetime

In a new report released Wednesday on the characterization of AMOLED display technology, DisplaySearch addressed the Sony XEL-1 TV and the technology’s sub-pixel architecture, micro cavity, and compensation circuits.

Toray Industries Inc announced that it has succeeded in developing blue light emitting materials, boasting the world’s highest levels of efficiency and pure color emissions, for use in full-color organic EL displays.

The combination of Toray’s proprietary molecular design technology and nano-dispersion technology was instrumental in the material achieving superior light emitting performances of luminous efficiency 6 cd/A (candela/ampere) and color purity (CIE(x,y) = (0.14,0.10)) in combination with Toray’s electron-transporting material.

Evaluation of these newly developed materials with respect to its applications is currently underway and Toray is committed to accelerating the process towards its early commercialization.

“OLEDs have better color and flexibility and the capability of larger displays, but companies still need an inexpensive encapsulation method that can be used to mass produce organic electronics that don’t allow moisture in,” said Wusheng Tong, a senior research scientist at the Georgia Tech Research Institute (GTRI).

In April 2008, we had the chance of interviewing Mary Kilitziraki, Fast2Light's project manager. Fast2Light is an integrated (9 companies, 3 research institutes and 2 universities) R&D project that aims to research and develop light emitting foils based on OLED tech.

OLED-T today announced the launch of its low temperature organic electron injector material EI-111-2Me. OLED displays are manufactured from a sandwich of different materials including the electron injector layer. This layer is responsible for injecting electrons from the cathode into the OLED structure, the efficiency of which is critical to the performance of the display.
 
EI-111-2Me is a low temperature replacement for Lithium Floride (LiF), the material typically used by OLED display manufactures as the electron injector layer within an OLED display. Low temperature OLED materials reduce the cost of manufacturing and the potential damage to the underlying layers of the display, thereby improving the lifetime and voltage drift over the lifetime of the OLED device.

Samsung Electronics has acquired the IP assets of Clairvoyante Inc, an IP licensing company responsible for the development of PenTile subpixel rendering display technology and associated gamut mapping algorithms. The IP includes extending the lifetime of high-resolution mobile OLED displays.

Dr. Karsten Heuser, Director of OLED Lighting Technology at OSRAM Opto Semiconductors, is pleased with the excellent intermediate results. “Our development team has reached a real milestone for warm white OLEDs with efficiency of 46 lm/W (CIE of 0.46/0.42 measured in the integrated sphere) and a 5,000-hour lifetime, at a brightness of 1,000 cd/m². With these significant increases, flat OLED light sources are approaching the values of conventional lighting solutions and are therefore becoming attractive for a wide variety of applications.”

Summary:

• Red phosphorescent emitter functions optimally with Novaled’s proprietary technology for highly power-efficient OLEDs
• Delivers lifetime of 50,000 hours at initial brightness of 1,000 cd/sqm
• Supports market trend toward high-performance, low-voltage OLED devices

Ciba has developed a deep red phosphorescent OLED emitter that functions optimally in combination with the Novaled PIN OLED™ technology, delivering a lifetime of 50,000 hours at an initial brightness of 1,000 cd/sqm. The new material supports the market trend toward high-performance, low-voltage OLED devices for display and lighting applications.

TMDisplay has succeeded in doubling their OLED efficiency using a metal membrance. The new design allows them to run the OLEDs at half the brightness, and thus gain twice the lifetime. TMDisplay did not disclose when they will start making OLED TVs, although the new design should not delay the TVs.

Idemitsu Kosan and Universal Display Corporation today announced that they have signed an agreement to extend their collaboration to accelerate the development of phosphorescent OLED materials for use in displays fabricated through “dry” processing methods, such as vacuum thermal evaporation. The agreement expands the collaboration into red and green phosphorescent OLED materials, in addition to the blue materials that the two companies have been collaborating to develop since December, 2006.