2024-11-18
What is the role of led violet band
What is the role of led violet band
The main functions of LED violet band are as follows:
- fluorescence analysis : purple lamp can stimulate the internal electronic transition of substance molecules, produce fluorescence phenomenon, used for the detection and analysis of substance molecules, is an important tool for fluorescence analysis.
- ultraviolet curing : the wavelength of the violet lamp can stimulate the photosensitizer in the ultraviolet curing agent, generate free radicals, promote the ultraviolet curing reaction, and is widely used in printing, painting, bonding and other industries.
- disinfection : Purple lamp has high energy, can destroy the DNA structure and cell membrane of bacteria, to achieve sterile, environmentally friendly disinfection and sterilization.
In addition, according to the different bands of ultraviolet light, purple leds have other specific applications. For example, the UVA band (315-400nm) is used for curing adhesives, coatings, resins and inks, the UVB band (280-315nm) is used in biomedicine, DNA analysis, etc., and the UVC band (below 280nm) is mainly used for air, water purification and disinfection and sterilization of sewage treatment systems.
Uv LED, visible LED, infrared LED difference
- ultraviolet LED : the luminous center wavelength is below 400nm, mainly used for ultraviolet curing, fluorescence analysis, disinfection and sterilization. Among them, UVA band is used for curing, UVB band is used for biomedicine, UVC band is widely used in air and water purification and disinfection and sterilization .
- visible LED : The luminous band is in the visible range, such as blue light, green light, yellow light, red light, mainly used for lighting, display and so on. Among them, the blue band needs to pay special attention to blue light protection, and violet excitation technology can reduce the production of harmful blue light .
- infrared LED : The luminous band is in the infrared range, mainly used for night vision monitoring, remote control, sensing and so on. Its working principle is based on the photoelectric effect of semiconductor materials, which emits light at forward bias through PN junction.
How to distinguish UV LED, visible LED, infrared LED?
Luminous band :
- ultraviolet LED : The luminous center wavelength is below 400nm, which belongs to invisible light.
- visible LED : The luminous band is in the visible range, such as blue light, green light and so on.
- infrared LED : The luminous band is between 700nm and 1000nm, which belongs to the invisible infrared range.
Application field :
- ultraviolet LED : used for ultraviolet curing, fluorescence analysis, disinfection and sterilization.
- visible LED : mainly used for lighting, display and so on.
- infrared LED : used for night vision monitoring, remote control, sensing, etc.
security :
- ultraviolet LED : has potential damage to skin and eyes, should take protective measures when used.
- visible LED : relatively safe for human eyes and skin.
- infrared LED : Because it is not visible, it usually does not cause direct damage to the human eye, but attention should be paid to heat management.
Which band of LED has the longest life
- Uv LED : UV leds, especially those in the UVA and UVB bands, generally have a high durability. Among them, the service life of the LED UV lamp can reach more than 20,000 hours, which greatly reduces the replacement frequency and maintenance costs 1.
- visible LED : The life of visible LED varies according to the specific band and manufacturing process, but in general, its life is also quite long. Some high-quality LED arrays can have a lifetime of 50,000 hours (effective life of 10,000 hours), many times longer than the life of ordinary leds .
- infrared LED : infrared LED life is also very long, the service life of infrared LED beads is estimated to be 50,000 hours MTBF, that is, the average time without failure .
summary : From a life point of view, infrared leds and some high-quality visible light leds (such as LED arrays) have a relatively longer life, both of which can reach 50,000 hours or more. Although the life of UV LED is also longer, it is slightly lower in comparison, usually more than 20,000 hours. Therefore, if life is the only consideration, infrared leds and some visible light leds may be more advantageous.
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