UVA LEDs in Industrial Applications

It is a well-known fact that LEDs are used in smartphones and tablets, as well as different types of displays and sensors, but they are also widely used behind the scenes. In manufacturing processes, UVA LEDs from LG Innotek offer wavelengths from 365 nm to 405 nm and so are particularly useful.

UV LEDs Used to Cure Touchscreens
UVA LEDs are used to cure adhesives; for example, touch-sensitive screens are assembled by bonding together the display glass, touchscreens, and LCD displays across the entire surface. When smartphones first came out, the touchscreen and display were stacked on top of each other without a surface adhesive - air was sealed between the layers. As the screens got larger, framing and pressure distribution became more difficult. Full-surface adhesion became an integral part of production. This has made it possible to produce flatter and flatter smartphones, as well as to produce and assemble them more quickly and easily.

Curing of Other Adhesives
UVA LEDs are also used to cure DVDs, automotive electronics, and cabin equipment in aeroplanes. Another popular application is the curing of laminate flooring.

Also Ideal for Varnishes and Printing Inks
Varnishes and printing inks also need to be cured, in addition to adhesives.  These substances start out as a liquid and are solidified via a chemical reaction within a matter of seconds by the high-energy radiation of UVA LEDs.  UVA LEDs are also used in the dental industry to cure composite fillings in teeth.  Activating an initiator at a wavelength of from 300 nm to 450 nm triggers the polymerisation of the composite and the curing of the filling.

UV LEDs in place of UV Lamps – The Advantages:
LEDs continue to replace UV lamps and flash lamps in these applications, as:

1. UVA LEDs have a longer lifetime, typically >10,000 hours
2. LEDs feature short switching times because they do not need to warm up
3. LEDs require very little space
4. The heat radiation of UV LEDs is minimal