Lumex QuasarBrite™ UV LEDs
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This document introduces Lumex's new QuasarBrite UV LED products. It provides an overview of UV wavelengths and applications, and reviews challenges with existing UV LEDs, such as limited life hours and low efficiency. The document then describes Lumex's QuasarBrite UV LEDs, which overcome challenges of other UV LEDs and offer greater flexibility and efficiency to engineers.
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Lumex QuasarBrite™ UV LEDs
- 3. Ultraviolet Light Wavelengths in nanometers (nm) 780nm Visible Light UV Infrared 420nm 100nm
- 4. Spectrum of UV Light 780nm Visible Light UV Infrared Wavelengths in nanometers (nm) 420nm 100nm 100nm 420nm 315nm 280nm UV A Long Wave UV B Medium Wave UV C Short Wave
- 6. Advantages of UV LEDs vs. CFL
- 7. Challenges of Using UV LEDs – Life Hours 0 hours 5,000 hours
- 8. Challenges of Using UV LEDs – Efficiency 1 Watt Input Power 0.15 Watt Output Power
- 9. Lumex QuasarBrite™ UV LEDs
Editor's Notes
- Welcome to the training module on Lumex QuasarBrite™ UV LEDs.
- This training module will introduce Lumex’s QuasarBrite UV LEDs.
- Ultraviolet light or UV light is invisible to the human eye. This is because UV wavelengths are too short for human eyes to perceive. UV LEDs span the wavelength spectrum from 100 nanometers to 420 nanometers. Despite the potential hazards of ultraviolet light which are evident in every day life, such as sun burn, the UV spectrum is proving to have many beneficial effects in a multitude of areas. Not unlike how standard, visible LEDs have impacted today’s marketplace, the advancement of UV LEDs is offering a wide range of advantages to a diverse number of applications. This promising technology is moving the UV market segment into a whole new level of product innovation and performance.
- Within the wavelength spectrum, the range of UV light can be broken into three primary areas. The Ultraviolet A, or UV-A long wave, falls within the range of 315 nanometers to 420 nanometers. Ultraviolet B or, or UV-B medium wave, is within the 280 nanometers to 315 nanometer range. And finally Ultraviolet C, or UV-C short wave, is with the 100 nanometers to 280 nanometer range. Each area within the UV spectrum offers distinct benefits in industries ranging from medical to forensic science and to test and measurement.
- Many applications in today’s marketplace are ideally suited for, and already utilizing, UV LED technology. Within the UV spectrum, examples of such applications include counterfeit detection, bodily fluid detection and analysis, polymer and ink printing, and medical light therapy and sterilization.
- There has been a marked increase in the adoption of UV LEDs for applications that until recently relied upon fluorescent UV lights. UV LEDs offer many benefits over traditional CFL UV lamps. For example, UV LEDs utilize much less energy than their CFL counterparts. UV LEDs are RoHS compliant and they are not toxic if broken. In addition, UV LEDs offer much smaller, more compact sizes than CFL lamps, and UV LEDs are much more resistant to vibration and impact.
- Until recently, the challenge of using UV LEDs had been stabilizing the die at the wavelengths needed. Recent advancements have overcome the stabilization of the die, but challenges still remain in the packaging of the die in an effort to yield the same life hours as existing standard LED technology. Standard epoxy packages usually provide less than 5,000 life hours because the UV rays break the epoxy down rapidly. ‘Hardened’ or ‘UV resistant’ epoxy packages usually have less than 10,000 life hours, which is still not nearly enough for most applications and the epoxy break down is erratic, not graceful or linear.
- One of the other major challenges of utilizing UV LEDs for any application is the efficiency rate. For many applications such as medical light therapy, water sterilization and polymer curing at less than 365nm, the output power is only 5-8% of the input power. At 395nm and above the efficiency improves, but only to about 15%.
- The Lumex QuasarBrite UV LED family comes in three different wavelengths, 385nm, 405nm and 415nm. The applications at 385nm include counterfeit detection, bacterial sterilization and ink fluorescing. At 405nm, one of the key applications is forensic analysis of bodily fluids. Finally, the 415nm UV LED can be used in superficial sterilization including skin treatment. All three LEDs come in a robust TO-42 package with glass lens, which increases life hours from 5,000 compared to an epoxy package up to a minimum of 50,000 hours.
- UV LEDs have impacted today’s marketplace, offering a wide range of advantages to a diverse number of applications. UV LEDs offer many benefits over traditional UV lamps, such as energy consumption, environmentally friendly are more compact and offer much more resistance to vibration and impact. However challenges still remain such as extended life hours and power output efficiency. Lumex’s new QuasarBrite UV LEDs overcome these challenges and has extended the use of UV LEDs in ways that might not have been considered for applications in the past, such as counterfeit detection, forensic science and medical devices.
- Thank you for taking the time to view this presentation on “ Lumex QuasarBrite™ UV LEDs” . If you would like to learn more or go on to purchase some of these devices, you may either click on the part list link, or simply call our sales hotline. For more technical information you may either visit the LUMEX site, or if you would prefer to speak to someone live, please call our hotline number, or even use our ‘live chat’ online facility. You may visit Element 14 e-community to post your questions.