How does the next generation flat panel video display developed by Canon and Toshiba differ from other emerging video technologies? SED TV, (Surface-Conduction Electron-Emitter Display) born from the marriage of Canon and Toshiba’s SED Inc., was exhibited as a prototype at the recent CES (Consumer Electronics Show) in Las Vegas. In fact, it’s a bit of a step backwards when SED Inc., the Canon Company and Toshiba formed to mass-produce the exciting new SED TV after years of researching this new technology. Nonetheless, SED TV captivated attendees on this year’s show, leaving video enthusiasts across the country eagerly anticipating the launch of SED TV in US stores.
SED TV combines the technologies of yesterday and today to offer the video viewer the best of both worlds. For example, SED TV uses one electron gun per pixel as opposed to a single electron gun. Since the electrons don’t have to travel that far, less energy is needed. Also, because the electrons are so close to the display surface, the SED TV is much thinner than the CRT (Cathode-Ray Tube).
SED Inc. hopes to launch the SED TV in stores this year, but will not hit maximum production targets until 2010. Yet 2007 could bring SED TV out of the emerging spotlight and into most stores.
The OLED (Organic Light-Emitting Diode) is one of the promising competitors of SED TV, and which also uses less power than the traditional LCD screen. OLED technology is a thin-film light-emitting diode (LED) designed primarily as picture elements in convenient display devices.
Eastman-Kodak has developed small molecule OLEDs. Since OLEDS can be printed on any suitable substrate using inkjet technology, they can have a lower cost than LCD or plasma displays.
Still, we’re likely to see SED TVs before an OLED screen. The biggest technical problem for OLED technology to overcome has been the limited lifespan of organic materials. In particular, current materials used as blue OLEDs generally have a lifespan of around 1000 hours when used for flat screens, which is less than the lifespans typical of LCD or plasma technology.
But that’s not the only reason we’re going to buy SED TVs first. Another concern of OLED technology is that water intrusion into screens can damage or destroy organic material. Therefore, improved sealing methods are important for practical manufacture and may limit the endurance of more flexible screens.
Another competitor of SED TV technology is the FED (Field Emission Display), which has not yet reached commercialization. FED is a flat panel display technology that uses a grid of tiny cathodes for the generation of images. Sony is researching FED because some believe it is the flatscreen technology that most closely resembles the CRT image.
DEF were invented over 20 years ago. The problem with DEF is efficiency. To get enough electrons to produce adequate light, you cause internal destruction of the emission layer. The reflected electrons poison the layer. Destruction begins with burning effects and eventually progresses to complete breakdown of the structure. These hurdles caused the downfall of most of the Fed’s efforts, but variations of the technology still appear every now and then as many companies are still struggling to find new ways to compete with LCD screens.
If Canon and Toshiba i.e. SED Inc. are successful, OLED and FED tech workers will soon be referring to SED TV like their competitors in the flat panel industry, as SED televisions will likely be available in select stores before Christmas 2007.
Source by B. Johansson