News tagged with diode
Soraa LED light may dim 50-watt halogen rivals
(PhysOrg.com) -- Soraa, a Fremont, California company founded in 2008, this week launched its first product, a light that uses LEDS (light emitting diodes). The "Soraa LED MR16 lamp" is the "perfect" replacement ...
Feb 09, 2012 |
4.4 / 5 (19) |
21
|
Light control technique could lead to tunable lighting and displays
(PhysOrg.com) -- Over the past several years, organic light-emitting diodes (OLEDs) have become a popular light source due to their advantages including bright displays, wide viewing angles, and the ability ...
Jan 11, 2012 |
4.6 / 5 (7) |
0
|
LG to sell 55-inch TV using new ultra-thin tech
(AP) -- For flat-panel TVs, the choice for years has been between plasma and LCD. In the coming year, there'll be another choice, at least for those prepared to spend big.
Electronics / Consumer & Gadgets
Jan 01, 2012 |
4.1 / 5 (10) |
0
Cotton computing goes live at Cornell textiles lab
(PhysOrg.com) -- Researchers from France, Italy and the United States are weaving cotton with transistors for a new look in computing. Based on news about a lab at Cornell University, wearable computing is ...
Technology / Hi Tech & Innovation
Dec 30, 2011 |
4.1 / 5 (10) |
6
|
55": LG announces world's largest OLED TV panel
LG Display announced that it has developed the world's largest 55-inch OLED (Organic Light Emitting Diodes) TV panel. The 55-inch panel is a significant step forward in the popularization of OLED TVs and demonstrates ...
Electronics / Consumer & Gadgets
Dec 27, 2011 |
4.4 / 5 (16) |
9
|
New device could bring optical information processing
(PhysOrg.com) -- Researchers have created a new type of optical device small enough to fit millions on a computer chip that could lead to faster, more powerful information processing and supercomputers.
Dec 22, 2011 |
5 / 5 (9) |
0
|
New technique makes it easier to etch semiconductors
Creating semiconductor structures for high-end optoelectronic devices just got easier, thanks to University of Illinois researchers.
Dec 22, 2011 |
3.6 / 5 (5) |
3
|
Jumping droplets take a lot of heat
Microscopic water droplets jumping from one surface to another may hold the key to a wide array of more energy efficient products, ranging from large solar panels to compact laptop computers.
Dec 12, 2011 |
5 / 5 (6) |
0
|
S-t-r-e-t-c-h-i-n-g electrical conductance to the limit
Individual molecules have been used to create electrical components like resistors, transistors and diodes, that mimic the properties of familiar semiconductors. But according to Nongjian (NJ) Tao, a researcher ...
Dec 05, 2011 |
4.5 / 5 (4) |
1
|
Bright future for gaN nanowires
The gallium nitride nanowires grown by PML scientists may only be a few tenths of a micrometer in diameter, but they promise a very wide range of applications, from new light-emitting diodes and diode lasers ...
Nov 29, 2011 |
4.8 / 5 (4) |
0
|
Patent application for innovative film - possible Indium Tin Oxide replacement
Jude Iroh, professor of materials science and engineering at the University of Cincinnati holds several patents dating to his days as a graduate student. Another may soon be on the way.
Nov 10, 2011 |
4.9 / 5 (9) |
14
|
Unique bipolar compounds enhance functionality of organic electronics
Researchers often work with a narrow range of compounds when making organic electronics, such as solar panels, light emitting diodes and transistors. Professor Tim Bender and Ph.D. Candidate Graham Morse of University of ...
Nov 05, 2011 |
5 / 5 (4) |
0
|
'Low tech' light in neutron beam illuminates photosynthesis in bacteria
(PhysOrg.com) -- Researchers at the Bio-SANS instrument at the High Flux Isotope Reactor are getting a leg up in their research from an ingenious "low tech" lighting tool that can be fixed to their samples ...
Chemistry / Analytical Chemistry
Sep 28, 2011 |
not rated yet |
1
Taiwan saves electricity with new traffic lights
Authorities in Taiwan said Wednesday they had changed more than 690,000 traffic lights throught the island in a project that will save enough electricity to power more than 60,000 homes.
Technology / Energy & Green Tech
Sep 28, 2011 |
not rated yet |
0
Panasonic turns on OLED lighting roadmap, announces record efficiency
(PhysOrg.com) -- Japan-based Panasonic Electric Works (PEW) has announced an aggressive roadmap to make organic light-emitting diodes (OLED) lighting a part of the not so distant future. The company has said ...
Sep 02, 2011 |
4.5 / 5 (11) |
4
|
Diode
In electronics, a diode is a two-terminal device (thermionic diodes may also have one or two ancillary terminals for a heater).
Diodes have two active electrodes between which the signal of interest may flow, and most are used for their unidirectional electric current property. The varicap diode is used as an electrically adjustable capacitor.
The unidirectionality most diodes exhibit is sometimes generically called the rectifying property. The most common function of a diode is to allow an electric current in one direction (called the forward biased condition) and to block the current in the opposite direction (the reverse biased condition). Thus, the diode can be thought of as an electronic version of a check valve.
Real diodes do not display such a perfect on-off directionality but have a more complex non-linear electrical characteristic, which depends on the particular type of diode technology. Diodes also have many other functions in which they are not designed to operate in this on-off manner.
Early diodes included “cat’s whisker” crystals and vacuum tube devices (also called thermionic valves). Today most diodes are made of silicon, but other semiconductors such a germanium are sometimes used.
For more information about Diode, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
