Thorough understanding of LED

by:Mylight     2020-11-29
Believe everyone to leds have a certain understanding, know the advantages of LED lamps and lanterns and so on, but for the LED professional knowledge we should also understand somewhat, so that at the time of purchase of LED lamps and lanterns can have a better understanding of, can be more conducive to saving energy! LED LED is the abbreviation of light emitting diode ( 发光二极管) , it is a solid light-emitting semiconductor device, it is the use of solid semiconductor chip as a luminescent material, when both ends with the forward voltage, carrier in the semiconductor compound photon emission and produce light. Leds can be directly send red, yellow, blue, green, blue, orange, purple, white light. Solid solid refers to using solid luminescence materials, such as light-emitting diodes ( 领导) And electroluminescent ( EL) , organic light-emitting ( OLED) As the way to the light source. Semiconductor refers to using LED as light source. Light emitting diode light emitting diode chip is a p-n junction structure ( PN junction is a piece of p-type semiconductor ( As the majority carrier) And a piece of n-type semiconductor ( Hole for the majority carrier) Together after the formation of a p-n junction. General structure of the diode is so so, the characteristics of the PN is a one-way electrical conductivity, are very common in the dc. ) , have an independent positive and negative electrodes, after add electric radiation emitting discrete semiconductor wafers. LED modules, LED module is composed of single or multiple light emitting diode chip and drive circuit, control circuit package together, with a connecting interface and has the function of light, and sealed the whole unit. LED components, LED components is to point to by leds or LED module and electronic components together, has a certain function and can repair or removable composition unit. LED LED packaging refers to the LED chip and package seal welding line, and the power supply connection, the light and the cooling channels, mechanical and environmental protection and overall dimensions. Luminous flux flux refers to light the sum total of the amount of light emitted per second. Unit: lumen ( Lm) , said lights shine, shine the more the greater the number of lumens. Light intensity refers to the light in a particular direction unit the luminous flux emitted within the solid Angle. Unit: candela ( cd) 。 Intensity of illumination, E) Illumination is refers to the light irradiation in the luminous flux per unit area as object. It is the unit of: lux ( Lux) = lumens Lm/m2 area. Brightness is refers to the light in a particular direction unit solid Angle of the luminous flux per unit area. Unit is:, ( ' 。 Photosynthetic efficiency refers to the lighting electric light source's ability to convert electric energy into light, with a luminous flux divided by power consumption. Unit: lumens per watt ( Lm / w) 。 Photosynthetic efficiency is one of the important indicators to measure light source energy conservation, which is by the flux divided by the light from the light source power consumption. The average life expectancy is a batch of lights to 50% the number of hours of damage. Unit: ( h) 。 Economic life refers to the damage and at the same time consider the light bulb light beam attenuation under the condition of output, the composite beam output to a specific number of hours. Outdoor light source was 70%, indoor led lighting is 80%. Color rendering color refers to the degree of light source color rendering of the object itself, this is called color rendering, yan is really * * * degree; Light source color rendering is showed by color rendering index, which represents the object under the light color than the benchmark light ( The light from the sun) The color deviation, can comprehensively reflect the light source color feature. To correctly represent object was the color of the need to use high color rendering index of the light source. Units: Ra. Color temperature refers to the color of the light emitting light color temperature radiation at a certain temperature light hue at the same time, the temperature of the blackbody is referred to as the light source color temperature. Light source color temperature is different, have different color, color temperature value below 3000 k has a warm feeling, sedate atmosphere; Color temperature in k - 3000 Among 5000 k for color temperature, feel cool; Color temperature above 5000 k feel cold. Unit: K. Glare dizzy just to view with high brightness of objects or strong brightness contrast, can cause visual discomfort, this is called a glare, dazzling light is the important factors that affect the quality. Above is energy-saving certification product professional knowledge sharing for the led lamps and lanterns, hope to help you!
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