Transparent OLEDs

Samsung shows an OLED "window" (30% transparent panels)

oled — Thu, 30 Oct 2008 00:32:23 -0400

Samsung is showing a window made from OLED Panels (12.1", 840x504 with 200cd/m2 luminance). The panels are 30% transmittive - which means they are transparent. You can see in the image to the right how it looks. From the back the window is almost (70%) transparent.

The OLED panel employs low-temperature polysilicon TFTs for the drive element. The device structure is a top emission type, and organic EL materials for RBG colors are separately applied by using a metal mask. Samsung declined to comment on the details of the technology that realized the high transmittance.

Sony partners with the Max Planck Institute on flexible, transparent OLEDs

oled — Fri, 03 Oct 2008 02:35:32 -0400

Sony and the Max Planck Institute have demoed a flexible and transparent OLED display - a breakthrough in the technology, they say. The new OLED technology is based on the upconversion of red or infrared light and has a number of advantages over today's LCD and screens.

Previous attempts at making clear, flexible OLEDs were hampered by size and resolution limitations, and by organic componds that distorted the image when folded.

The Sony/Max Planck collaboration has overcome these problems by using unique combinations for the organic compounds within a viscous polymeric matrix.

CombOLED - A New EU Project For Cost Effective OLED Mass Production

oled — Sun, 22 Jun 2008 00:35:29 -0400

OSRAM Opto Semiconductors is spearheading the effort to develop cost-effective volume production methods for organic light emitting diodes (OLEDs) under the CombOLED project, a European funded research and development project that was conceived to combine new device structures, advantageous manufacturing approaches and less complex materials with the aim to achieve cost effective OLED lighting solutions.

Interview with Mary Kilitziraki, Fast2Light project manager

oled — Wed, 16 Apr 2008 06:02:31 -0400

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.

Engineers Develop Transparent AMOLED display

oled — Wed, 02 Apr 2008 13:22:36 -0400

Researchers at Purdue University have created the first active matrix display that uses a new class of transparent transistors and circuits. The researchers say this is a first step towards flexible color monitors and “heads-up displays” in car windshields.

New Transparent White OLED from OSRAM Opto Semiconductors Achieves High Level of Performance

oled — Thu, 13 Dec 2007 12:42:58 -0500

OSRAM Opto Semiconductors has developed a transparent white OLED tile with outstanding performance. Under laboratory conditions, the OLED prototype has achieved a luminous efficiency of more than 20 lm/W at a brightness of 1000 cd/m². This opens up possible applications such as partitions that are almost invisible by day and can provide a pleasant diffused light at night.

The large-scale prototype of the transparent white OLED tile with color coordinates 0.396/0.404 (CIEx/y main emissive side) lights up an area of nearly 90 cm². The OLED is transparent whether it is powered on or off, and its transparency is currently rated at 55%. As the product is further developed, this value is expected to reach 75%.

UDC Announces Advances in Transparent White OLEDs for Lighting Applications

oled — Thu, 06 Dec 2007 09:55:25 -0500

Mr. Sidney Rosenblatt, Universal Display’s Chief Financial Officer, discussed and demonstrated the Company’s new white lighting concept. Supported, in part, by the U.S. Department of Energy (DOE) under a Small Business Innovation Research (SBIR) grant, researchers at Universal Display recently developed a novel OLED lighting prototype that emits white light energy-efficiently when turned on and becomes transparent when turned off.

With a power efficiency of 45 lumens/Watt (lm/W) demonstrated to date and the possibility of achieving up to 150 lm/W with additional development in the future, white phosphorescent OLED lighting has the potential to lead to significant energy savings and additional environmental or ‘green’ benefits. Additionally, the very thin and transparent form factor of this new lighting concept offers numerous design advantages that may enable a variety of novel uses as compared to existing incandescent and fluorescent lighting products.

Purdue and Northwest Universities: new flexible and transparent transistors

oled — Wed, 06 Jun 2007 02:26:11 -0400

Researchers at Purdue University and Northwest University have developed a flexible and transparent transistor using a combination of zinc-oxide and indium-oxide nanowires. These invisible and bendable transistors actually preform better than conventional transistors, and can be easily built onto sheets of flexible plastic.

Unidym Signs a Collaboration Agreement with IMRE to Develop OLEDs Incorporating Unidym’s Transparent Electrodes

oled — Wed, 10 Jan 2007 00:55:10 -0500

Arrowhead Research Corporation announced today that its majority-owned subsidiary, Unidym, has entered into a collaborative agreement with the Institute of Materials Research and Engineering (“IMRE”) in Singapore to develop organic light emitting diodes (“OLEDs”) incorporating transparent electrodes made of carbon nanotubes. Under the terms of the agreement, Unidym will provide IMRE researchers with access to its proprietary, carbon nanotube-based, transparent electrodes which IMRE will incorporate into its OLED devices.

Carbon nanotube-based transparent electrodes have the potential to improve the performance of OLEDs while also reducing their production costs.

German researchers claim first transparent OLED pixels

oled — Fri, 31 Mar 2006 01:00:00 -0500

The researchers, located at the Technical University of Braunschweig, are claiming the development to be a world's first. Their approach is to use transparent TFTs (thin-film transistors) made of a 100-nanometer-thick layer of zinc-tin-oxide, which transmits more than 90 percent of visible light. Such transistors are more often made of silicon, which is used for LCDs (liquid crystal displays) but is highly absorptive in the visible part of the spectrum.
In the devices developed by the researchers, the brightness of the OLED pixels varied from 0 to 700 candelas per square meter by changing the voltage of the driving TFTs. By comparison, typical computer screens today reach a brightness of approximately 300 candelas per square meter.
Thomas Riedl, head of the organic and inorganic lasers team of the High-Frequency Institute at the Technical University of Braunschweig expects the first prototype transparent OLED displays to be available in two years.