Sony unveils Rolled OLED screen

Sony ROLED

The ROLED screen was first announced in May 2010. The new Sony LED displace can be Rolled on a pen. 4.1 inch Sony OLED display integrating organic thin-film transistors and OLED technology and can be wrapped around a diameter as small as 4mm (a pencil). Although still in production, expect to see this baby on the market in the near future.

OLED

An organic light emitting diode (OLED), is a light-emitting diode (LED) whose emissive electroluminescent layer is composed of a film of organic compounds that emit light when an electric current passes through it. This layer of organic semiconductor material is formed between two electrodes, where at least one of the electrodes is transparent. Such devices are used in television screens, computer monitors, small, portable system screens such as mobile phones and PDAs, watches, advertising, information and indication. OLEDs can also be used in light sources for general space illumination, and large-area light-emitting elements. Due to their earlier stage of development, OLEDs typically emit less light per unit area than inorganic solid-state based LEDs similarly designed for use as point-light sources. OLEDs have certain advantages over traditional liquid crystal displays (LCDs). OLED displays do not require a backlight to function. Thus, they can display deep black levels and can be thinner and lighter than LCD panels. OLED displays also naturally achieve higher contrast ratios than either LCD screens using cold cathode fluorescent lamps (CCFLs) or the more recently developed LED backlights in conditions of low ambient light such as dark rooms. There are at least two types of OLEDs: those that are based on small molecules and those that employ polymers. Adding mobile ions to an OLED creates a Light-emitting Electrochemical Cell or LEC, which operates slightly differently than an OLED.