With their low power consumption, LED based lighting sources are making their mark in the electronics world. These wonder devices are merely semiconductors which release energy in form of photons when they are connected in forward bias in an electric circuit. With the use of an LED light panel, one gets to achieve faster switching and is able to retain the lights for longer than contemporary sources.
One of the most popular uses for LEDs is in indicator lights on the control panels of machines used in industrial settings. An epoxy casing is used to enclose an assembly of the light source and a reflective band for light distribution. From the earliest red LEDs, manufacturers have been able to produce other colors through advancements in their technologies.
Commercial production of these devices was later done using gallium arsenide phosphide. With the passage of time, planar manufacturing processes were discovered and combined with innovative packaging to drastically lower the cost per unit. Today, many variants of the originals have been created to suit different operating conditions such as power and harsh environments.
Collisions between electrons and holes within the junction leads to a phenomena known as electroluminescence. Each time the electron fuses with a hole, there is an associated loss of energy in form of photons. The nature of illumination given off will depend on the physical dimensions of the band gap. The refractive indices of raw materials must be accounted for during manufacturing for the device to give a good performance.
Packaging in the form of panels and plastic cases is done in order to make the assembly process easier for technicians. They also offer protection to internal circuitry as well as attempting to balance refractive indices of the raw material and air. They are however prone to droop, a condition characterized by reduced light output when the current exceeds a predefined value.
A typical LED has an ability to serve for over 25,000 hours if operated as per the supplier recommendations. A major challenge in their use is getting obscured during snowfall since they generate minimal heat. It is common to have outdoor panels fitted with an extra heating circuit to automatically thaw away any settled snow.
Multi color LEDs can be used to come up with other colors by mixing the original beams in different proportions. This calls for inclusion of an extra circuit to accurately regulate the amount of each basic color required to give off targeted hues. An easier approach uses phosphor coatings of different shades to alter the original wavelength.
A popular arrangement uses multi-vibrators to control lighting sequences for panels used by advertisers. One example is the bicolor panel which alternates the color whenever current flow is reversed. A notable trend in this sector is the discarding of once popular alphanumeric panels for the more flexible liquid crystal displays.
Some of the shortcomings experienced in the usage of LED light panels include the need for resistor banks to regulate power delivered. Some users have also complained of the color altering effect as compared to light from fluorescent tubes. Nevertheless, their use is expanding fast, with the automotive and airports fixtures the most obvious.
One of the most popular uses for LEDs is in indicator lights on the control panels of machines used in industrial settings. An epoxy casing is used to enclose an assembly of the light source and a reflective band for light distribution. From the earliest red LEDs, manufacturers have been able to produce other colors through advancements in their technologies.
Commercial production of these devices was later done using gallium arsenide phosphide. With the passage of time, planar manufacturing processes were discovered and combined with innovative packaging to drastically lower the cost per unit. Today, many variants of the originals have been created to suit different operating conditions such as power and harsh environments.
Collisions between electrons and holes within the junction leads to a phenomena known as electroluminescence. Each time the electron fuses with a hole, there is an associated loss of energy in form of photons. The nature of illumination given off will depend on the physical dimensions of the band gap. The refractive indices of raw materials must be accounted for during manufacturing for the device to give a good performance.
Packaging in the form of panels and plastic cases is done in order to make the assembly process easier for technicians. They also offer protection to internal circuitry as well as attempting to balance refractive indices of the raw material and air. They are however prone to droop, a condition characterized by reduced light output when the current exceeds a predefined value.
A typical LED has an ability to serve for over 25,000 hours if operated as per the supplier recommendations. A major challenge in their use is getting obscured during snowfall since they generate minimal heat. It is common to have outdoor panels fitted with an extra heating circuit to automatically thaw away any settled snow.
Multi color LEDs can be used to come up with other colors by mixing the original beams in different proportions. This calls for inclusion of an extra circuit to accurately regulate the amount of each basic color required to give off targeted hues. An easier approach uses phosphor coatings of different shades to alter the original wavelength.
A popular arrangement uses multi-vibrators to control lighting sequences for panels used by advertisers. One example is the bicolor panel which alternates the color whenever current flow is reversed. A notable trend in this sector is the discarding of once popular alphanumeric panels for the more flexible liquid crystal displays.
Some of the shortcomings experienced in the usage of LED light panels include the need for resistor banks to regulate power delivered. Some users have also complained of the color altering effect as compared to light from fluorescent tubes. Nevertheless, their use is expanding fast, with the automotive and airports fixtures the most obvious.
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