Seeing The Light…
Added: (Fri May 24 2002)
Pressbox (Press Release) -
Displays That Could Replace Light Bulbs
And Be Used As Wallpaper
The rise of low-cost, flat, flexible information displays and their potential to revolutionise our environment has been widely predicted. Oxford-based technology innovator, Opsys brings this closer to commercial reality. The company has developed new organic light emitting materials to produce displays with world beating efficiency.
Displays and light emitting panels will be inexpensive enough to incorporate into wall coverings, furniture and even safety clothing. They will be as efficient as light bulbs and will not only provide information, but also dיcor, ambient lighting and signage applications.
Opsys’ revolutionary technology has been developed in collaboration with Opsys’ sponsored researchers at the Universities of Oxford and St Andrews. It is based around newly developed chemical materials called dendrimers that are used in the production of organic light emitting diode (or OLED) displays.
These dendrimer materials emit coloured light when subjected to an electric current and because the dendrimers are in solution (similar to an ink) they can be printed directly onto most flat surfaces to make a display screen. This manufacturing process is cost-efficient and enables the development of low-cost, ultra thin displays, which could be contoured, flexible and transparent.
Opsys’ new dendrimer materials enable displays to be produced that have much brighter, purer colours than conventional displays. Crucially, the new dendrimer displays have been proven to be more power efficient; a vital consideration for the commercial viability of such screens, particularly in portable battery-powered products such as mobile phones and personal digital assistants (PDAs).
Commenting upon the new technology, Michael Holmes, Opsys’ CEO says, “Dendrimer-based technology is an exciting breakthrough that will revolutionise the display industry. The possibilities presented are tremendously exciting. In the not too distant future you could see transparent display screens on shop windows, personal curved ‘wristband’ displays, light emitting panels in protective safety clothing and even TV’s that you could roll up and carry around!”
Professor Ifor Samuel of St Andrews University announces Opsys’ breakthrough this week at the world’s leading display symposium, ‘Society for Information Display 2002’, taking place in Boston, USA. The detailed findings will be published in a paper entitled “A Green Phosphorescent Dendrimer for Light-emitting Diodes” in Advanced Materials, on 4 July 2002.
Notes to Editors:
The benefits of OLEDs have been widely reported within the industry. OLED displays can achieve full colour potential and are readable over a 160 degree angle, even under bright light conditions. OLEDs are fast and efficient; because they are solid state devices, their switching speeds are 100 to 1000 times faster than LCDs, yet their power consumption is less than conventional backlit liquid crystal displays. In addition, OLEDs can operate over a wide range of temperatures and are also thin and lightweight due to their emissive nature and the fact that no backlight source is required.
Dendrimers: Technical Overview
Light emitting dendrimers constitute a new but rapidly maturing materials technology in the field of organic light emitting diodes (OLEDs). They comprise an organic light-emitting core, which is connected to surface groups by highly branched organic molecules, like a snowflake.
The different molecules control properties such as the colour emitted. A key advantage of dendrimers is their high efficiency, which results from the fact that the luminescent cores are kept well apart by the bulky dendrons, thus minimising luminescence quenching.
During tests, the OLEDs produced using Opsys’ new dendrimer materials proved the most efficient ever reported in the world for a device manufactured by solution processing.
Opsys, headquartered in Oxford, UK, was founded in 1997 to advance cutting edge light emitting technology for flat displays. Opsys’ researchers work closely with academics from both Oxford and St Andrews Universities in order to put innovative technologies on to an industrial development footing. Opsys intends to license its dendrimer materials for use in OLED displays.
In 2001, Opsys established a 42,000 sq. ft. research and prototyping facility based in Fremont, California, for the development of small to medium sized custom displays for the portable electronics industry. The industry is targeting a wide range of electronics products for OLEDs, including mobile phones, PDAs, digital cameras, camcorders, microdisplays, and eventually personal computer and consumer products.
For further information about Opsys, visit www.opsysdisplays.com.