LED lighting terminology so that you know LED lighting
LED lighting is also quite a complex industry, which has involved a large number of specifications and technical means and other professional name, only to grasp the meaning of these technical terms, we can give you LED lighting further depth to explore. This is a basic knowledge of LED lighting popular article, I hope to help the reader.
LED light-emitting diodes in abbreviation (LightEmittingDiode), is a semiconductor light-emitting solid device, it is the use of solid semiconductor chip as luminescent materials, when both ends with a positive voltage, the semiconductor carrier recombination occurs and cause photon emission generate light. LED can emit red, yellow, blue, green, blue, orange, purple, white light.
Solid State Lighting:
Solid-state lighting refers to the use of solid light-emitting materials, such as light emitting diode (LED), electroluminescent (EL), organic light emitting (OLED), etc., as illumination source.
It refers to the use of LED as a light source of lighting.
Light emitting diode chip refers to a PN junction structure (PN junction refers to a P-type semiconductor (electron majority carrier) and an N-type semiconductor (hole majority carrier) after a PN junction with each other to form a general diode structure is the case, characteristics of PN is unidirectional conductivity, the DC circuit is very common.), separate the positive and negative electrodes, after power radiation emitting discrete semiconductor wafer.
LED module is defined by a single or a plurality of light emitting diode chips and a driver circuit, the control circuit package together with the connection interface and having a light emitting function, and not an integral unit detachably.
LED assembly refers to the combination of LEDs or LED modules and electronic components together with a certain functionality and removable for repair or combination unit.
LED package refers to the LED chip and wire encapsulated, and provide an electrical connection, a light cooling channels, dimensions and mechanical and environmental protection.
Luminous flux is the sum of the amount of light per second luminous body issued. Unit: Lumen (Lm), indicates how much light emitting phosphor, the greater the number of lumens, the more luminous.
Luminous intensity is the luminous body in a specific direction within the unit solid angle emitted flux. Unit: candela (cd).
Illumination is the luminous flux is irradiated on a unit area of the illuminated object. Its units are: lux (Lux) = lm Lm / area m2.
Brightness refers to the luminous flux luminous body in a specific direction within a unit solid angle per unit area. Unit: Nepalese off (mcd).
Electric light efficiency refers to the ability to convert light to electrical energy light, luminous flux emitted divided by power consumption to represent. Unit: lumens per watt (Lm / w). Light efficiency is an important indicator of energy sources, which is the light flux emitted from the light source is divided by the power consumed.
Average life expectancy:
It refers to the number of light hours to 50% of the amount of damage. Unit: hours (h).
Means at the same time considering the damage and the condition of the light beam output attenuation of light bulbs, the integrated beam output is reduced to a specific number of hours. Outdoor light was 70%, 80% of indoor lighting.
Color refers to the degree of the light source color rendering of the object itself, this color is called, is really Yan *** extent; the color of the light source is determined by the color rendering index to indicate that it represents an object in the light lower than the color deviates from the reference light (sunlight) lighting color, can more fully reflect the color characteristics of the light source. To show the correct original color of the object need to use high color rendering index of the light source. Unit: Ra.
Color temperature refers to the color of light emitted light hue blackbody radiation at a temperature at the same time, the blackbody temperature is called the color temperature of the light source. Different color temperature of the light source, the light colors are different, the color temperature of 3000k or less warm feeling to achieve stable atmosphere; color temperature 3000k-5000k color temperature is in the middle, there is a refreshing feeling; color temperature over 5000k cold feeling. Unit: K.
Glare refers to the field of vision has a high brightness object or a strong brightness contrast, can cause visual discomfort, herein referred to as glare, glare is an important factor affecting the quality of lighting.