The world of electronics has seen an increase in the number of light emitting diodes used in many units due to their low power demands. In essence, these are semiconductor devices produced through special manufacturing technologies to convert some electrical energy into photons. LED light panels are desirable due to their faster responses to signals as compared to incandescent power 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.
One of the last procedures in the plant process is packaging in a plastic case. This offers mechanical protection as well as making the device easier to handle during mounting. The widely available plastics will also be manipulated to counter refraction by the basic raw materials. The manufacturer also uses them to indicate some basic product specifications for easier identity in the market.
With operation in the optimum conditions of temperature and power supply, LED light panels are guaranteed to last for more than 25,000 hours. Due to their lower heat generation, they may be obscured by snow build up on a cold winter night. This shortcoming has forced many producers to include a heating mechanism albeit at a risk of lowering overall efficiency.
With the red, green and yellow lights, it is possible to come up with a myriad colors by varying the relative proportions. This is achieved by use of control circuits to vary the primary wavelengths by different degrees. An alternative is to use a phosphor coating with the targeted color on the surface.
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.
One of the last procedures in the plant process is packaging in a plastic case. This offers mechanical protection as well as making the device easier to handle during mounting. The widely available plastics will also be manipulated to counter refraction by the basic raw materials. The manufacturer also uses them to indicate some basic product specifications for easier identity in the market.
With operation in the optimum conditions of temperature and power supply, LED light panels are guaranteed to last for more than 25,000 hours. Due to their lower heat generation, they may be obscured by snow build up on a cold winter night. This shortcoming has forced many producers to include a heating mechanism albeit at a risk of lowering overall efficiency.
With the red, green and yellow lights, it is possible to come up with a myriad colors by varying the relative proportions. This is achieved by use of control circuits to vary the primary wavelengths by different degrees. An alternative is to use a phosphor coating with the targeted color on the surface.
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.
