News tagged with diode
Turning heat to electricity... efficiently
(PhysOrg.com) -- In everything from computer processor chips to car engines to electric powerplants, the need to get rid of excess heat creates a major source of inefficiency. But new research points the way ...
Nov 18, 2009 |
4.8 / 5 (67) |
9
Advance could change modern electronics: High-performance 'metal-insulator-metal' diode created
Researchers at Oregon State University have solved a quest in fundamental material science that has eluded scientists since the 1960s, and could form the basis of a new approach to electronics.
Oct 29, 2010 |
4.8 / 5 (52) |
22
|
NREL Finds a Way to Give LEDs the Green Light
(PhysOrg.com) -- Light bulbs that last 100 years and fill rooms with brilliant ambiance may become a reality sooner rather than later, thanks to a National Renewable Energy Laboratory discovery.
Apr 05, 2010 |
4.7 / 5 (52) |
20
|
New OLETs emit light more efficiently than equivalent OLEDs
(PhysOrg.com) -- Already, organic light-emitting diodes (OLEDs) are becoming commercialized for light display applications due to their advantages such as low fabrication costs and large-area emission. But ...
Nanotechnology / Nanomaterials
May 31, 2010 |
4.9 / 5 (33) |
8
|
Quantum-dot LED screens may soon rival OLEDs and LCDs
(PhysOrg.com) -- A partnership has been formed between US, South Korean and Belgian companies to develop quantum-dot light emitting diode (QLED) displays to rival the organic light emitting diode (OLED) markets ...
Technology / Hi Tech & Innovation
Dec 13, 2010 |
4.8 / 5 (30) |
28
|
Super-thin flexible OLED from Sony
(PhysOrg.com) -- Sony is showing off prototypes incorporating its super-thin, flexible OLED technology at the CREATEC JAPAN 2009 IT and electronics trade show in Makuhari Messe (Chiba) in Japan.
Electronics / Consumer & Gadgets
Oct 07, 2009 |
4.6 / 5 (31) |
10
Two Retinal Imaging Display Devices at Prototype Stage
(PhysOrg.com) -- NEC and Brother are both developing wearable prototype devices that use Retinal Imaging Display (RID) technology to project images directly on the wearer's retina. NEC's gadget is designed ...
Electronics / Consumer & Gadgets
Oct 30, 2009 |
4.9 / 5 (29) |
9
Cheap, efficient white light LEDs new design
Roughly 20 percent of the electricity consumed worldwide is used to light homes, businesses, and other private and public spaces. Though this consumption represents a large drain on resources, it also presents ...
Apr 07, 2009 |
4.9 / 5 (26) |
5
Foldable display shows no crease after 100,000 folding cycles
(PhysOrg.com) -- One of the most difficult problems for designing mobile devices is finding a way to minimize the size of the device while simultaneously maximizing the size of the display. To get the best ...
May 12, 2011 |
4.9 / 5 (26) |
10
|
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 (27) |
24
|
Atomtronic transistor and diode could advance quantum computing
(PhysOrg.com) -- What if atoms could be used to perform the functions currently the province of electronic devices? The goal of atomtronics is to do just that by creating analogues to the common items found in electronic ...
Oct 09, 2009 |
4.6 / 5 (25) |
5
Smart Lighting: New LED Drops the 'Droop'
(PhysOrg.com) -- Researchers at Rensselaer Polytechnic Institute have developed and demonstrated a new type of light emitting diode (LED) with significantly improved lighting performance and energy efficiency.
Jan 12, 2009 |
4.8 / 5 (24) |
14
Organic light-emitting diode screens ready to go mainstream
It's not yet lights-out for LCD and plasma, but OLED displays are finally ready to begin pushing those technologies out of the limelight.
Jun 24, 2009 |
4.5 / 5 (22) |
6
Liquid crystal lasers promise cheaper, high colour resolution laser television
(PhysOrg.com) -- Researchers at the Centre of Molecular Materials for Photonics and Electronics (CMMPE) (part of the Department's Photonics Research Group at the University of Cambridge) are leading the way ...
Apr 20, 2009 |
4.6 / 5 (21) |
4
LED light bulbs yield big savings in energy
One way the United States could slash its electricity use, dependence on fossil fuels and emissions of heat-trapping gases is really quite simple: better light bulbs.
Technology / Energy & Green Tech
Aug 13, 2009 |
4.8 / 5 (20) |
42
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.
