The new coronavirus is sensitive to ultraviolet rays, opportunities for the LED industry under the epidemic

The "New Coronavirus Infection Pneumonia Diagnosis and Treatment Plan (Trial Version 5)" pointed out that the new coronavirus is sensitive to ultraviolet light. Recent studies have found that there is a correlation between the new coronavirus and the SARS coronavirus. Therefore, in theory, the scientific and rational use of ultraviolet light can effectively inactivate the coronavirus.
Ultraviolet sterilization technology is one of the most commonly used and oldest sterilization technologies in medicine, and has a history of more than 100 years. It is understood that according to the wavelength, the ultraviolet band is divided into UVA, UVB and UVC from long to short. Among them, deep ultraviolet UVC is the band with the shortest wavelength and the highest energy. In the ultraviolet band, the band with direct sterilization capability is UVC.
During the SARS period in 2003, experts from the Institute of Viral Disease Control and Prevention of the Chinese Center for Disease Control and Prevention found that the use of ultraviolet rays with an intensity greater than 90 μW/cm2 for 30 minutes to irradiate the coronavirus can kill the SARS virus.
Although there is no test report of a third-party testing laboratory using deep ultraviolet to kill the new coronavirus in this epidemic, many professionals in the industry say that UVC targets the deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) of bacteria and viruses. ) Has an efficient killing effect, and the new coronavirus is an RNA virus. In practice, the UVC inactivation dose of the new coronavirus requires further experiments by relevant government departments and scientific research institutions to clarify. At present, the inactivation dose of SARS virus is generally referred to.

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The meaning of common specifications and models of LED patches

0603, 0805, 1210, 3528, 5050 refer to the size of surface mount SMD LEDs. For example, 0603 refers to a length of 0.06 inches and a width of 0.03 inches. But please note that the 3528 and 5050 units are metric. The following is a detailed introduction of these specifications:

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RGB and white LED

When it comes to the grievances and hatreds of white LEDs, we cannot fail to mention RGB and white LEDs. The two have the same goal in different ways. They all hope to achieve the effect of white light, but one is directly presented in white light, and the other is in red, green and blue. Mixed light; one said that the other party's purity was not enough and the price was too expensive, the other retorted that he was beautiful in color, and criticized the other party for being old and declining. I am afraid that such a war will not stop in the short term. However

How to distinguish the positive and negative poles of SMD LED lamp beads

Many packages, like some 0603, 0805 and other SMD LEDs, will have a green "T" symbol on the bottom. One horizontal side of the "T" is the positive pole, and the other side is the negative pole. Some SMD LEDs will be marked with a silk screen similar to a triangle symbol, so the bottom side of the triangle is close to the positive pole, and the top corner is close to the negative pole. The lead of the light-emitting diode is generally longer at the anode and shorter at the cathode.

LED light emitting diode

Light-emitting diodes are commonly used light-emitting devices that emit energy through the recombination of electrons and holes to emit light. They are widely used in the field of lighting. Light-emitting diodes can efficiently convert electrical energy into light energy. LED lamps and lanterns generally have the characteristics of long life, good lighting effect, and energy saving. Because of so many characteristics that are superior to other traditional lamps, they have a wide range of uses in modern society, such as lighting, flat panel displays, and medical devices.