Tuesday, October 17, 2000
You can't exactly bask in the glow of the dim displays often found on today's wireless and handheld electronics devices. But you may take a shine to a new generation of polymeric screens that have just been commercialized by Dow Chemical Company (Midland, MI) and Delta Optoelectronics Inc. (Hsin-chu, Taiwan).
These polymeric light-emitting diode (pLED) displays are the first based on Dow's polyfluorene copolymer, which is applied as two-layer film at a thickness of just 50 to 100 nanometers. The material works in displays by emitting light when exposed to electricity.
As emissive displays, pLEDs shine bright without any backlighting to drive up weight, space, and power requirements, according to Jim O'Brien, Dow's technical director for electroactive polymers. He adds that pLEDs also "offer a much wider viewing angle than LCDs" because emissive displays reduce then number of layers that can interfere with light transmission.
Delta Optolectronics, a subsidiary of Delta Electronics Inc., reports that it can now make up to 300,000 sq inches of displays per month and will increase production as demand for pLED products grows. For the next few months, that demand will have to be limited to small, monochromatic displays since Dow only has a green polymer available. But early next year, Dow will introduce the red and blue polymers needed for larger, full-color displays, O'Brien reports.
For more information, see www.dow.com.