Innovation of LED Lighting

Almost we all know and are familiar with LEDs, we see in our daily routine LED televisions, cell phones, remote controls, digital watches and other LED appliances. 

Constant innovation and development allowed a Japanese scientist discovered some years ago that allowed gallium nitride create a blue LED. With all the elements at hand, researchers developed the first LED white light and in recent years the white LED has evolved by leaps and introduced new materials to create LEDs virtually the entire visible spectrum of colors and offering while light efficiency that exceeds that of incandescent lamps. These new LEDs, bright, efficient and colorful, are expanding their domain to a wide range of lighting applications, displacing its previous domain field was the mere indication, since today is the lighting technology most promising and which is likely to be the dominant source of light in the future.

LED Lighting

Among the many advantages of LEDs is that they operate at low voltages, between 1 and 4 volts, and drive currents between 10 and 40 milliamps, if higher values ​​apply to those indicated, the diode can be melted. Considering the particularity of low energy consumption and high brightness, and its undeniable advantage of outdoor use signs (e.g. traffic signs) will have the future of these small semiconductor devices is actually very promising, as indicated by the numbers current market growth worldwide.

The word LED is an acronym for " Light Emitting Diode ", or" Light Emitting Diode ", and refers to the light produced by a semiconductor (diode) to be within a solid and transparent capsule and works as a focus when a current is passed through its terminals. A lens that protects the LED emitting material and determines the light beam. Unlike traditional light emitters, LEDs have polarity (being the positive terminal anode and cathode negative terminal) so they work only to be polarized live.

Without going into more detail of its operation, we can say that when electricity passes through a diode, the atoms of one material (contained in a chip-reflector) are excited to a higher level. The atoms in the first material retained a lot of energy and require free. This energy releases electrons to the second reflector material within the chip and during this liberation light is produced.

 In other words, the electroluminescence occurs when stimulated by a voltage differential, the negative electric charges (electrons) and positively charged ions, to be combined, resulting in the release of energy as photons. This creates a much more efficient light energy conversion as occurs with much less loss as heat that as with traditional incandescent bulbs. The color of the light is on emitting semiconductor materials and processes of chip-reflector.

The color of the light from an LED is due to the amount of the photon energy. In turn, the amount of energy depends on the material used for the layers, so that LEDs, depending on the combination of the chemical elements present in the component material, can produce a wide range of wavelengths within the color spectrum, resulting in different colors.