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Like standard visible LEDs, the development of UV LEDs will bring more convenience to many different applications. The latest technological developments are expanding some of the market for UV LEDs to new heights in product innovation and performance. Design engineers are noticing that the new technology of UV LEDs can generate significant profit, energy and space savings compared to other alternative technologies. The next generation of UV LED technology has five important advantages, which is why the technology market is expected to grow by 31% in the next five years.
One: a wide range of uses
The spectrum of ultraviolet light contains all wavelengths from 100nm to 400nm and is generally subdivided into three categories: UV-A (315-400 nm, also known as long-wave UV) and UV-B (280-315 nm, also known as medium wave). UV), UV-C (100-280 nm, also known as short-wave UV). Dental treatment instruments and identification applications are early applications of UV LEDs, but performance, cost and durability benefits, as well as extended product life, are rapidly increasing the use of UV LEDs. Current uses for UV LEDs include: optical sensors and instruments (230-400 nm), UV identification, barcode (230-280 nm), surface water sterilization (240-280 nm), identification and body fluid detection and analysis (250-405 nm), Protein analysis and drug discovery (270-300nm), medical phototherapy (300-320nm), polymer and ink printing (300-365nm), identification (375-395nm), surface sterilization / cosmetic sterilization (390-410nm ).
Second: environmental impact - lower energy consumption, reduced waste and non-hazardous materials
Ultraviolet LEDs have significant environmental benefits over other alternative technologies. Ultraviolet LEDs consume 70% less energy than fluorescent (CCFL) lamps. In addition, UV LEDs are ROHS certified and do not contain mercury, a hazardous substance commonly found in CCFL technology. Ultraviolet LEDs are smaller and more durable than CCFLs. Since the ultraviolet LED has anti-vibration and impact resistance, it is rarely damaged, thereby reducing waste and cost.
Three: increase the life
In the past decade, UV LEDs have been challenged by their longevity. Despite its many benefits, the use of UV LEDs has dropped significantly because the UV beam easily breaks down the epoxy of the LED, reducing the life of the UV LED to less than 8,000 hours. The next-generation technology for UV LEDs is characterized by a "hardened" or "UV-resistant" epoxy package that, while providing a lifetime of 20,000 hours, is far from adequate for most applications.
What is a UVLED point source? Line source? Surface source? What are the application areas and difficulties?
At present, the application form of UVLED is a little light source, line source and surface light source. It is the same from the principle of illumination. What is UVLED point source? Line source? Surface source?
Point light source Generally, a UV LED lamp bead (in most cases, a single core, but also a multi-chip) emits light to form a point called a point source.
The line source is generally a plurality of UVLED lamp beads (also integrated chips) arranged in a row, emitting linear light, forming a line, called a line source
The surface light source is a plurality of UVLED lamp beads formed in a plurality of rows and columns according to different arrangement and combination, and emits light of various shapes to form a surface, which is called a surface light source.
At present, the point source\line source has been widely used, mainly because of low cost and technically good implementation. The heat dissipation generally adopts a heat dissipation module + air-cooling mode, and the driving is not complicated:
â—‹ Hard disk head assembly (gold wire fixing, bearing, coil, die bonding, etc.)
â—‹ Motor and component assembly (wire, coil fixing, coil end fixing, PTC/NTC component bonding, protection transformer core)
â—‹DVD/digital camera (lens, lens sticking, board reinforcement)
â—‹ Sensor production (gas sensor, photoelectric sensor, fiber sensor, photoelectric encoder, etc.)
â—‹ Mobile phone component assembly (camera lens, earpiece, microphone, housing, LCD module, touch screen coating, etc.)
â—‹TFT-LCD liquid crystal panel filling port package
â—‹ TFT-LCD liquid crystal panel FPC paste package
â—‹PCB industry LED VU light curing application
â—‹Optical industry-ST-LED UV curing application
â—‹ Optical component assembly (lens group, prism, optical engine assembly, COD, COMS)
â—‹Optical communication industry LED UV curing application
â—‹ Yuan source device (PLC road device, wavelength division multiplexer WDM, array grating waveguide AWG) various glass package structure bonding or potting, fixing of small components, etc.
â—‹ Research and Institute - ST-LED UV curing application
â—‹ Medical device LED UV light source curing application
The surface light source is different. Many lamp beads are integrated. The solution of heat dissipation is a big problem, and so many lamp beads and driving are also a headache. Therefore, many companies only have point light sources and line light sources. I dare not touch this reason.