A ITBIT ABOUT "O LED" T.V.'s
Organic Light Emitting Device (OLED) technology is emerging as a leading next-generation technology for electronic displays and lighting. Universal Display Corporation, a leading technology developer, has spearheaded numerous breakthroughs in this field, as described throughout this Web site.
OLEDs can provide desirable advantages over today’s liquid crystal displays (LCDs), as well as benefits to product designers and end users. OLEDs feature:
- Vibrant colors
- High contrast
- Excellent grayscale
- Full-motion video
- Wide viewing angles from all directions
- A wide range of pixel sizes
- Low power consumption
- Low operating voltages
- Wide operating temperature range
- Long operating lifetime
- A thin and lightweight form factor
- Cost-effective manufacturability
Universal Display Corporation's proprietary technologies promise to bring performance to monochrome and full-color displays in ways previously unimagined. Envision thin, lightweight displays that are bright and easy to read, that consume less power, that are flexible and, when turned off, even transparent. Or, think about a bright-white light panel that can replace today’s bulky and fragile incandescent bulbs and fluorescent tubes. These are a few of the possibilities that Universal Display Corporation's proprietary OLED technologies may bring to light.
What Is an OLED and How Does It Work?
As this schematic shows, an OLED is a monolithic, solid-state device that typically consists of a series of organic thin films sandwiched between two thin-film conductive electrodes. The choice of organic materials and the layer structure determine the device’s performance features: emitted color, operating lifetime and power efficiency.
When electricity is applied to an OLED, charge carriers (holes and electrons) are injected from the electrodes into the organic thin films. They migrate through the device under the influence of an electrical field. The charge carriers then recombine, forming excitons. In the past, conventional wisdom suggested that only about 25% of these excitons could generate light, with the remaining 75% lost as heat. This was known as fluorescent emission. Through a breakthrough by our academic partners at Princeton University and the University of Southern California, however, 100% of the excitons can be converted into light using a process known as electrophosphorescence, now commonly referred to as phosphorescence. Thus, the efficiency of a phosphorescent OLED is up to four times higher than that of a conventional fluorescent OLED. Universal Display Corporation is the founder and recognized leader in developing the high-efficiency PHOLED™ phosphorescent OLED technology and materials to exploit this discovery. Please link to
