LED TV Full Form Name: LED Meaning
Full Form of LED:
Light Emitting Diode
LED Full Form is Light
Emitting Diode. LED is a semiconductor device which gives out light with
the help of an electric current. It came into existence in 1962 when it was
utilized as indicators. Currently, it has evolved with the expanding technology
and is being used for all sort of lightings due to its substantial benefits and
energy efficiency.
Though during the initial days
LEDs were targeted more for military, aerospace and commercial industries. With
their ability to bring down maintenance costs significantly, they have gained
substantial acceptance in all fields of lighting requirements. LEDs offer
series of benefits including Range of voltage options, Low heat output, Reduced
light pollution, Prolonged lifespan, Less maintenance, Reduced energy
bills,Adjustable dim/dip control, Shock resistance, etc.
LED Full Form – Additional
Information
Light, a natural element that
allows us to perceive by means of our eyes. It is essential to our existence
and development and therefore, technology takes a keen interest in the
scientific development of light. There are two types of sources of light:
Natural Sources and Artificial sources. It is easy to name examples in each of
these two categories, as we have known about them since elementary school
though not in detail.
Sun, stars, etc they are natural
sources of light whereas street lamps, candles, fire, incandescent bulbs, etc
are artificial sources of light. Many scientific studies have been conducted in
these areas and a lot of development has occurred. As technology advanced, many
variants of artificial sources surfaced, with better-integrated technologies.
Incandescent is one of the oldest variants of artificial sources and was used
quite commonly in the last decade. However, worries rose because of lower
efficiency standards of these bulbs and thus, consumers started switching to
electric bulbs that offered greater efficiency at a cheaper rate.
Besides this, the environmental
movement has already taken the pace and called for reliable involvement from
industries. All these factors helped cost-efficient, better-performing light
sources to become more popular among consumers. One such light source is the
LED, which stands for Light Emitting Diode. It is characterized as a two-lead
semiconductor that is technically a p-n junction diode, which radiates out the
light when activated.
When the leads are supplied with
sufficient voltage, the recombination of electrons with the electron holes
occurs within the device that leads to the emission of energy in the form of
photons. The consequential effect has a scientific term electroluminescence,
which could be understood as an electrical phenomenon where a substance emits
light when an electric current passes through it. The energy band gap present
on the semiconductor is responsible for the color of the light emitted.
LED is not a just another variant
of the light source but has come down with better, efficient technological
incorporations that have helped in not only producing a reliable light source
but also conserving electricity, which is an essential source for mankind.
Thus, there are some points one must know about LEDs before rejecting them as
mere electric bulbs.
Discoveries and related
developments of LED:
LEDs work on the phenomenon
already mentioned and that is electroluminescence. Electroluminescence was
discovered in the year 1907 by the English experimenter H.J. Round, who used a
crystal made of silicon carbide and a cat’s whisker detector for the same.
However, it was only in the year 1927 that the world was introduced to its
first LED. Oleg Losev, a researcher from the erstwhile Soviet Union, created
it. Though after this discovery little progress was made over its properties
and uses in the following couple of years and it was only 1951 that the three
scientists namely, Kurt Leovec, Carl Accardo, and Edward Jamgochian exhibited
some of the features of LED.
Later in the year 1957, Rubin
Braunsttein of the Radio Corporation of America demonstrated that LEDs can be
used for short distance non-radio communication. In 1962, Nick Holonyak, Jr.,
developed the first visible-spectrum LED, when he worked at General Electric
Company. This LED was red in color. Later on, the first yellow LED was
developed by M. George Craford in the year 1972. Soon after, further
developments were made in LED technology. T.P. Pearsall developed semiconductor
materials with greater optical fiber transmission wavelengths, leading to the
creation of the world’s first high brightness and efficiency LEDs for optical
fiber communications.
Working principle of the LED:
The working principle
demonstrates how a particular device functions. While studying any device, it
is important to understand the underlying working principles that govern its
functions and properties. Thus, for the purpose of better understanding and
appreciation of the working of LED technology, the working principle is
necessary.
As mentioned earlier, the
two-lead semiconductor is actually a p-n junction diode and it is this diode
that does all the working. It converts the absorbed light energy into an
electric current but in an LED, it functions in a reverse fashion. It converts
electrical energy into light energy, resulting in the phenomenon
electroluminescence. There is then a recombination of electrons in a forward
based P-N junction, particularly in the P region.
These electrons are conduction
band of the energy levels whereas the holes with which these electrons combine
are in the valence energy band. The latter’s energy levels are lesser than the
former’s and thus, some energy is needed to be released in order to cause the
recombination. This energy so released is in the form of light and heat.
Lifetime of LED:
One of the indicators of good
performance is the lifetime. The longer a device lives, the better it is
considered. The lifetime of any device depends on upon its internal
characteristics and external factors, which together determine how long a
device can sustain its utility.
LED depends on temperatures,
which determine its performance to a great extent. While LEDs are less
susceptible to tampering but only if, they are operated at fewer currents and
temperatures. Even though the life span generally ranges from 25k to 100 k
hours but it may vary considerably according to the heat and current supply.
Since LEDs significantly depend on temperatures, the optimal temperature is
considered 25 degree Celsius or 77 degrees Fahrenheit.
However, LED technologies used in
street lamps may prove to be less efficient because of the exposure to
differential temperatures and currents. LED technology is considered best
suited for freezing lighting because they can save much of the refrigeration
costs. Failures are not that uncommon among LEDs, particularly those relating
tardy reduction of light generation and efficient performance.
Safety issues with LED:
LEDs are generally regarded as
safe under all normal uses. Most of these LEDs are categorized as “Class 1 LED
Product” or “LED Klasse 1”. LED products with these labels are safest all of
LEDs. It is only a few LEDs, particularly highly bright LEDs, that could
possibly cause temporary blindness but that has not yet been proven. These
highly bright LEDs are tagged as “Class 2” The Laser Safety regulations have
covered the use of Class 1 and Class LEDs.
LEDs do not contain mercury and
that is why they are generally preferred over fluorescent lamps but they do
contain other harmful substances such as arsenic, lead, etc. Studies have been
conducted on the possible harmful effects of the use of LED technologies and
they show that LEDs do not generally pose a threat to safety and health but
low-intensity red LEDs do pose hazardous effects.
Advantages of using LED
technology:
LED is a highly efficient
technology that has come into a rampant use since the beginning of 21st
century. Many characteristics of LED make it a favored technological option to
not only industrialists and scientists but also ordinary people. Some of the
advantages appended to LED are:
§ The efficiency
of LED is an asset to the technology, as a typical LED gives out more lumens
per watt than a typical incandescent bulb. Its efficiency remains unaffected
with its size and shape, which greatly affect the performance of incandescent or
other kinds of bulbs.
§ LEDs come
in very small sizes, around 2 mm or smaller and they can be conveniently
attached in tiny places.
§ Incandescent
bulbs are vulnerable to sudden failures whereas such failures are rarely
reported in LEDs. LEDs gradually lose their light over time.
§ LEDs enjoy a
longer life span than fluorescent and incandescent bulbs. While a typical
incandescent bulb can last for 1k to 2k hours approximately, an LED can last
for more than 25 k hours.
§ Incandescent
bulbs produce a large amount of heat and therefore cause unnecessary wastage of
energy. LEDs produce very little heat and are, therefore, more oriented towards
energy saving.
Disadvantages of using LED
technology:
We have extensively dealt with
the various benefits attached with the use of LED technology. However, nothing
can be perfect and there are always some or the other defects. LED too has many
disadvantages in its kitty. Some of its disadvantages are as follows:
§ While LEDs have
become cheaper with time, they are still more expensive than typical lighting
devices. The high costs stem from relatively low lumen output.
§ LEDs are
sensitive to varying voltage settings. Their lifetime is greatly affected by
changes in the voltage settings and therefore, they require a regulated supply
of current in order to ensure efficient performance.
§ LEDs attract
more insects than conventionally used bulbs and this can be a great nuisance to
consumers of such technology.
§ LEDs cannot be
used for traffic regulation during snowy winters because they produce less heat
and therefore, they can be easily shrouded by snow or become invisible in foggy
conditions.
§ LEDs largely
depend on temperatures. In fact, their performance is inversely proportional to
operating temperatures. Differential temperatures can greatly affect their
overall performance by reducing their life span. Use of LED in hot temperatures
may cause the device to fail.
LED Full Form: Local Economic
Development
Full Form of LED stands for
Local Economic Development. It is an approach to the economic development,
which offers opportunities to private sectors, non-profit sectors, and the
local government and communities to work together towards the economic growth.
The prime objective is to boost competitiveness and increase sustainable
growth. As the name indicates, Local Economic Development highlights the
significance of activities towards economic growth in districts, cities, and
regions. The aim is to focus on economic growth at the micro level to benefit
the macro level.
The practice of LED is undertaken
in various scales depending on the geography. Any given local government adopts
LED strategies to benefit its own jurisdiction and community. LED also involves
public participation by including various stakeholders’ concerns and views as a
part of the planning process. This makes strategies more practical and
applicable.
Some of the key approaches to
Local Economic Development are – to ensure the functionality of the local
investment climate to suit local businesses; to invest in physical
infrastructure and soft infrastructure including workforce, education,
regulatory issues, etc; and to support a growth of targeted clusters of
business that contribute to the economic development. The World Bank has been
offering huge support to various local governments and client cities in terms
of analysis, strategies, and financing the infrastructure for urban districts.
Full Form of LED: Local
Employment Dynamics
LED Full Form refers to Local
Employment Dynamics .LED or Local Employment Dynamics is a partnership
between the U.S. Census Bureau and the state labor market data agencies. The
partnership is to develop new data about the local job market conditions with
absolute confidentiality and without any additional respondent burden. LED
provides historical and time-sensitive demographic information; locations of
various industries; listing of the industries that propose to hire new
employees; demographic figures of salary; details of workers by age, gender,
and industry. It also provides the economic trends of the workers by sex, age,
county, state, and WSA.
Some examples of the Local
Employment Dynamics that are used by decision makers include; measurement of
worker turnover; wages of workers in every industry by geography; and the
density of workforce in each industry. QWI or Quarterly Workforce
Indicators is an essential tool for LED. QWI refers to the series of economic
indicators that include wages, job creation, worker turnover, etc. by county,
state, and metro. QWI is available only for states that are partnered with LED
and is purely built on wage records. LED partnership works towards filling the
gap of critical data and provide information on workplace indicators required
by the local and state authorities.
LED Full Form: Love Equals Death
Full Form of LED refers to
Love Equals Death (band). It is a punk rock band of Petaluma, California.
The music of the troop had an influence of horror punk and classic rock. Love
Equals Death was formed first formed in 2003 with a release of a studio album
and a compilation album – the two EPs. From then the band went around
performing all over the United States. The initial lineup of the band consisted
of guitarist John Rosser; vocalist Chon Travis; drummer Tonio Garcia-Romero;
and bassist Dominic Davi.
The ensemble recorded their
complete album ‘Nightmerica’ in 2005 November, which was released in 2006.
Later the band faced some eventualities and incidents of arrest of one of the
members. Some of the members were replaced and the orchestra continued to
perform till 2008. Finally, in April 2008, the band announced their breakup.
Their popular music videos were; ‘The Outsiders’ in 2008; ‘Pray for me’ in
2006; ‘Bombs Over Brooklyn’ in 2006; and Truth has Failed in 2007. After the
breakup in 2008, artists Jordon, Duffs, and Kelly-Holden had formed a new band
called ‘Good Knives’ with Shaun Phillips as the singer. They made use of the
songs of Love Equals Death albums. Eventually, even this band was
disintegrated.
Full Form of LED: Louisiana Economic
Development
LED Full Form stands for
Louisiana Economic Development. Louisiana Economic Development is in charge
of intensifying the business environment and creating a more vibrant economy in
the state. The state has a huge network of EDO or Economic Development
Organizations and allies, which are dedicated to help the community to maintain
and grow the business. LED operates with a vision of having consistency in
boosting economic opportunity and job creation. LED works with local and
regional economic development organizations; police juries; municipalities; and
has a statewide partnership with various economic and business associations.
To achieve the mission, LED has
its own set of strategies such as; improving competitiveness in state economy
and communities; identify and cultivate the best economic development tools in
every part of the state; have a keen focus on business expansion and retention;
develop robust workforce; and cultivate entrepreneurship, innovation, and small
businesses.
Various publications highlighted
the progressive development of Louisiana’s economy in 2014. The state entered
the top 10 list of DCI’s state business climate. There are various teams
focused on the business and economic development; project and product management;
business expansion and retention; new business development; research and
engineering services; etc. that have a direct impact on the economical growth
of the state and the country.