upamfva
Matrose
Joined: 11 November 2021
Location: Switzerland
Online Status: Offline
Posts: 17
|
| Posted: 17 November 2021 at 04:46 | IP Logged
|
|
|
What Is an LED Flashlight?
Traditional flashlights use an incandescent bulb powered
by a battery to provide light. The current from the
battery heats the filament wire inside the bulb, causing
it to glow and give off light. Incandescent bulb
flashlights have been in use since 1899, but they are
inefficient. The heat from the bulb is wasted energy, and
turning the flashlight on and off frequently causes the
filament to burn out. Light-emitting diode (LED)
flashlights, which were first sold in the early 2000s,
rely on the movement of electrodes to create light.
Because of the way they generate light, LED flashlights
use less power than traditional or halogen flashlights.
At the same time, they can generate more light. To get
more news about
c130982/">SupFire Flashlight, you can visit
flashlightbrand.com official website.
LED lighting has been in use since the 1960s--computers,
traffic lights, cars, TVs, and remote controls all use
LEDs. Before they could be used in flashlights, several
technical advances were required.
Finally, incandescent flashlights are less expensive than
LED lights; however, both the batteries and bulbs of an
LED last much longer. When you factor in the replacement
costs, LED flashlights are less expensive in the long
run.The first LED was invented by accident in 1961 by
James R. Biard and Gary Pittman, while working on
developing semiconductors. Shortly after that, IBM began
to use them in punch-card readers. Although LEDs were
used widely in numerous industries, it wasn’t until 1999
that the first LED flashlight was sold.
So, how do LED flashlights create light? They do so
through the movement of electrons through a
semiconductor. But what is a semiconductor, and how does
the movement of electrons create light? To explain that,
we will start with semiconductors.A semiconductor is made
from a substance that is a poor conductor of electricity.
Impurities added to the material allow it to be
manipulated to conduct electricity in some instances but
not others.
Silicon is a commonly used element (as in Silicon
Valley), although another element, gallium, is used to
manufacture LEDs. The process, however, is the same. By
themselves, silicon or gallium won’t allow electricity
to flow through them. However, when other elements are
added to it, silicon can conduct electricity—hence a
semiconductor.A transistor is created by using three
layers of a diode. A silicon chip can hold thousands of
transistors, thus creating the silicon chips that run our
computers and a multiple of other electronic devices.
None of those would be possible without the diode.
We know that atoms consist of electrons that orbit a
nucleus. If left undisturbed, the electrons remain within
their orbit. However, if electrons are forced to move
into a lower orbit, they create photons.
All diodes release photons, but those made purely from
silicon create low-frequency photons or infrared light
that our eyes can’t see. That is the reason that you
cannot see the light that comes from a remote control.
For us to see the photons, silicon needs to be doped with
materials that create more energy. A variety of colors
can be generated from LED lights by using different
materials. The common element is gallium, but other
elements create a broad spectrum of color options:
|
Active Topics 
Memberlist 
Search 
Help
Register 
Login
U47.org Forum :: The Cadet School
Topic: What Is an LED Flashlight?
