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Feb 19 2020

What Can LED Light Therapy Do?


I Introduction

II What is LED

III The Development of Photo-therapy and LED Light therapy

IV LED Light Therapy Principles

4.1 Red light

4.2 Blue Light

4.3 Purple Light

4.4 Green Light (560nm)

V Application of LED Light Therapy

 5.1 Beauty Products of LED Light Therapy

  5.1.1 LED Face Mask

  5.1.2 Various Red Light Therapy Devices

  5.1.3 Specific Functions of LED Light Therapy

 5.2 LED Light Therapy For Jaundice

  5.2.1 Working Principles of Blue Light for Jaundice

  5.2.2 New Research Results of LED Light Therapy For Jaundice Children

I Introduction

In recent years, LED application fields have been continuously expanded, from general lighting, display backlighting to medical lighting, plant lighting, automotive lighting, etc., to alternative innovative applications, which have penetrated almost every aspect of people's clothing, food and shelter.

Since the invention of light therapy by humans, laser applications (including ruby lasers, amethyst lasers, semiconductor lasers, pulse dye lasers, krypton lasers, CO2 lasers, excimers) Laser machine, helium-neon laser machine), light-emitting semiconductor machine, high pulse light machine, E light machine. LED light therapy, as the latest application technology of light therapy, is the most common in our daily life.

LED is a new type of light source that has entered the application field in the past ten years, and it has been used in the medical field for about 6 years. It has shown excellent therapeutic effects in a short period of time. LED is a cold light source, which can well moisturize the skin while treating diseases. High-power LEDs have strong light intensity and have a good effect on the deep layer of the human skin. They are widely used in various departments in hospitals. The LED light sources currently used in the medical field are red, blue and purple. LEDs are used in disinfection, wound healing, and trauma The effects of treatment, inflammation elimination, edema elimination and photodynamic tumor treatment have been fully affirmed in the medical community.

 Can LED Light Improve Your Skin?

II What is LED

LED is the abbreviation of Lighting emitting diode, which is a light-emitting diode, which is made of compounds containing gallium (Ga), arsenic (As), phosphorus (P), nitrogen (N), etc. Semiconductor.

When electrons and holes are recombined, they can radiate visible light, so they can be used to make light-emitting diodes. Used as indicators in circuits and instruments, or composed of text or digital displays. The gallium arsenide diode emits red light, the gallium phosphide diode emits green light, the silicon carbide diode emits yellow light, and the gallium nitride diode emits blue light. Due to chemical properties, it is divided into organic light-emitting diode OLED and inorganic light-emitting diode LED. It changes the principle of emitting light from incandescent lamps and energy-saving lamps. Instead, it uses electric fields to emit light.

This electronic component appeared as early as 1962. In the early days, it could only emit low-light red light, and later developed other monochromatic light versions. The light that can be emitted today has reached visible light, infrared light and ultraviolet light, and the light level has increased to a considerable level Degree.


Figure1. LED

III The Development of Photo-therapy and LED Light Therapy

The use of optics in medicine has a long history. The use of light to treat human diseases is an ancient method. As early as thousands of years ago, China, Egypt and other countries used sunlight to treat diseases. As a new type of light source, with its biological effects gradually being recognized by people, LED is gradually applied to medicine and plays an active role.

 In 1903, Danish scientist Finson invented the optical therapy for lupus vulgaris and won the Nobel Prize. Later photo-therapy became popular in western countries, but because there were no suitable light sources and there were side effects of treatment, it was replaced by antibiotics. Since then, people have entered an era of unprecedented dependence on drugs. After the invention of the laser in the world in 1960, it marked a new era in optical therapy. The laser's high brightness, unisex, and wavelength selectivity have achieved great success in ophthalmology, dermatology, and surgery. Forgotten optical therapies re-enter scientists' vision. Today, lasers have been applied to all aspects of people's lives. Laser medical treatment has more advantages than traditional medical methods. For example, laser interventional minimally invasive therapy is unmatched by other technologies.

 For a long time, the high cost of lasers has hindered the development of medical lasers. After entering the new century, LED semiconductor light-emitting diode technology has been continuously improved, and the light-emitting materials and packaging technology have changed rapidly. Its advantages of high density, multi-wavelength, long life, and miniaturization have laid a solid foundation for leading LEDs to medical applications and partially replacing the laser. In comparison, the low cost, low energy consumption, and high stability of LEDs make LEDs have wider application prospects in medicine, and their advantages have surpassed traditional lasers, such as shorter healing time and less postoperative side effects. It should be said that the efficacy of LED light and LED care is a technological innovation relative to laser medical treatment. It is believed that the quality of LED light beam will also improve over time, and the treatment of LED will also extend from the surface of human skin to the body.


Figure2. LED Light Therapy

IV Working Principles of LED Light Therapy 

LED light stimulates fibroblasts, which can produce collagen, improve skin elasticity, scarring, and increase skin metabolism. Utilizing the organism's absorption of different visible light wavelengths, the mitochondria﹚is stimulated to generate more energy and prolong the life cycle of the cell. It is used in all parts of the human body, from the heart to the body, from the scalp to the toes, from the internal medicine to the surgery, as long as the light reaches the place, the effect treatment can be exerted. After laser and pulsed light, LED light therapy has become a new light therapy.

4.1 Red light

The red light with a wavelength of 635nm has the characteristics of high purity, strong light source, and uniform energy density. Red light has bactericidal, repairing and pain-removing effects, which can increase cell activity and promote cell metabolism.

4.2 Blue Light

Blue light with a wavelength of 405, 415nm has a strong bactericidal effect, which can quickly inhibit inflammation. During the formation of acne, it is mainly caused by Propionibacterium, and blue light can cause no damage to skin tissue, effectively destroy this bacteria.

4.3 Purple Light

The violet light with a wavelength of 313, 410nm has the advantages of sterilizing, purifying the skin, activating cells, and promoting protein and collagen synthesis. It has a good effect on specific dermatitis, vitiligo, scleroderma and so on.

4.4 Green Light (560nm)

Natural and soft light color, which has the effect of neutralizing and stabilizing nerves, can improve anxiety or depression; regulate skin gland function, effectively dredge lymph and improve edema, improve oily skin, acne, etc.

 Four Types of LED Light

Figure3. Four Types of LED Light

V Application of LED Light Therapy

People have always paid attention to the topic of beauty, hoping to find ways to save money and effort to improve their skin quality, and the rapid development of LED should be their good news. With the emergence of more and more light therapy beauty instruments, the size has also been reduced from fixed devices in beauty salons to being portable.

The light therapy effect of LEDs is based on the wavelengths of different spectra. Red light LEDs of 633nm to 660nm can promote collagen proliferation of the skin and even lighten fine lines and dark spots. Near-infrared LEDs with a wavelength of 780nm to 1200nm can be used Anti-inflammatory and analgesic. The blue LED and the green LED can also be used in the medical beauty market, which are respectively suitable for preventing the growth of acne and brightening, helping to absorb nutrients in skin care products, and improving the effect of allergic skin.

Laura Ferguson, founder of The Light Salon, a company focused on LED beauty, said that LED light therapy has many benefits, different effects at different wavelengths, such as anti-wrinkle or blemish, and the light will not have a band that will damage the skin Intrusive, painless light therapy, it even has a mood-relieving effect.

Nowadays, the medical beauty market is highly optimistic. The five-year compound growth rate is as high as 20%. Major manufacturers have launched various anti-wrinkle and acne-removing products with LEDs. Light therapy products are also more flexible and lighter. It is a portable beauty product. Like OPERA LED, which is a bit like a Halloween mask, it can improve the skin texture of the face and neck, so that users can enjoy LED beauty products at home.

Ferguson said that LED can also solve the problem of skin sensitivity. After light therapy, the newly stimulated cells will have a protective layer to help prevent sunburn from being exposed to strong sunlight. LED light therapy is not like a solarium, so you don't have to worry about melanin precipitation. However, the current price of LED medical beauty products is still high. In the future, the price is expected to decline as the technology of LED medical products matures. At that time, consumers' choices and needs will be more and more diversified.

 LED Light Therapy Devices

Figure4. LED Light Therapy Devices

5.1 Beauty Products of LED Light Therapy

5.1.1 LED Face Mask

The LED mask was invented by John Tsagaris, a Chinese medicine doctor. It is understood that John has a degree in human biological sciences from Chinese Medicine, and also holds a graduate diploma in skin treatment and beauty care. LED blue light can play a bactericidal and anti-inflammatory effect to improve the surface skin, and has a good effect on the treatment of acne and rosacea. LED red light can promote the growth of skin collagen, for deep skin beauty care.

The working principle of LED mask is similar to photosynthesis. It treats skin folds from the depth by changing the energy of LED red light. It can not only calm the skin, but also prevent the growth of bacteria inside the skin. The use of LED mask masks not only does not have a claustrophobic feeling, but the LED red light delivered to the skin in large quantities can make people feel comfortable. Just wear the LED mask for 25 minutes every day, and the LED red light can gradually improve your skin.

According to a survey report from the United States, LED masks have a significant effect on eliminating wrinkles. Another report showed that 90% of people believe that LED mask can reduce skin aging, make the skin more delicate and smooth, and greatly improve the crow's feet, red blood, and melanin deposition in the corners of the eyes.

LED Face Mask

Figure5. LED Face Mask

5.1.2 Various Red Light Therapy Devices

Red Light Therapy Devices come in a wide variety of designs, from handheld wands, to lamps, to wearable belts. These devices are all on the cheapest end of light therapy because they’re small, under-powered, and you have to use them for an enormous amount of time to receive any sort of clinically-relevant benefit.

Here are 10 top Red Light Therapy Devices for Skin:

(1) Red Light Therapy Device for Face and Neck by Eternal Beauty

(2) Pulsaderm Red LED – Light Therapy Technology

(3) LightStim for Wrinkles

(4) Project E Beauty RED Light Therapy Machine

(5) True Glow by Conair Light Therapy Solution

(6) Trophy Skin RejuvaliteMD Anti Aging Red LED Light Therapy Beauty Device

(7) NORLANYA Photon Therapy Facial Salon Skin Care Treatment Machine

(8) NORLANYA Photon Therapy Facial Skin Care Toning Mask

(9) Neutrogena Light Therapy Acne Treatment Face Mask

(10) Nova Red Facial Skin Care Machine

how to choose a red light therapy device

Figure6. How to Choose a Red Light Therapy Device

5.1.3 Specific Functions of LED Light Therapy

(1) Photorejuvenation

Photon skin rejuvenation technology is defined as non-exfoliation skin rejuvenation treatment using low-energy density under continuous high pulse light. At present, it has become one of the main methods to improve skin photoaging. This technology can significantly improve skin wrinkles and texture. Rough, irregular pigmentation and enlarged pores.Such phenomena have been recognized by many technical professionals and beauty applicants. The characteristic histological changes of skin photoaging are elastic fibrosis and collagen fiber maturation disorder in the dermal matrix, which leads to skin relaxation and wrinkles.

The study found that visible to near-infrared LED light penetrated the epidermis of the skin and reached the dermal layer of the skin, and promoted the regeneration and rearrangement of elastic fibers and collagen fibers through photothermal and photochemical effects, thereby reducing skin wrinkles and increasing elasticity.

(2) Prevent or treat pigmentation after inflammation

Pigmentation of skin after inflammation is a common and difficult to avoid phenomenon in skin physical and chemical cosmetology, and it is especially easy to appear in Asian people. For example, in order to reduce the degree of skin pigmentation after laser treatment in the clinic, generally avoid the season of excessive ultraviolet rays, ask patients to avoid sun, apply sunscreen, etc., but it is still difficult to completely avoid pigmentation after inflammation. Recent studies have found that 660nm LED light can prevent or even treat skin pigmentation that occurs after this inflammation, which will be a new research hotspot in the skin and beauty industry.

(3) Promote wound healing

It can be seen that LED light of various wavelengths in the near infrared can promote the growth of epithelial cells after trauma, and promote wound healing. At the same time, it also has a good therapeutic effect on the healing of chronic ulcers in the lower extremities of diabetic patients.

(4) Reduce inflammation

A series of studies have shown that LED has anti-inflammatory effects. Research has found that 635nm LED light can inhibit the release of the inflammatory mediator prostaglandin E2 (PGE2) by the fibroblasts of the gum, thereby reducing the inflammatory response of the gum. Before using pulsed dye laser to treat skin photoaging, if LED light source is used to irradiate in advance, it can reduce the discomfort of skin erythema, swelling and pain caused by dye laser. The use of LED light sources in advance of radiation therapy for breast cancer patients can reduce the side effects of radiotherapy.

(5) Scar prevention

Keloid keloids is a skin disorder that affects beauty and is difficult to treat clinically. It is caused by excessive proliferation of connective tissue after skin damage. Patients often have a scarring constitution. It started clinically as a small, hard red pimples, which slowly increased, producing round, oval, or irregular scars, higher than the skin surface, extending outward in the shape of a crab foot, with smooth and shiny skin, which may be accompanied by Pain, itching, etc. The clinical treatment is difficult and the effect is not ideal. Studies have found that LED can significantly improve the patient's pain, itching and other discomfort, make the scar flat, and have the advantages of non-invasive.

(6) Other functions

In addition, LED can also be used as a non-ultraviolet light therapy instrument, used in photodynamic therapy, hair loss treatment, skin damage reduction after ultraviolet irradiation, and so on.

In short, LED as a new type of light source has been gradually applied to dermatology. With the continuous innovation of LED lamps and the study of the biological effect of LED on medicine, the application of LED in dermatology will have unlimited prospects. . At the same time, LEDs have higher security and can be used more widely as home medical equipment.

LED Light Therapy....Does it Really Work? Can You Do it At HOME?

5.2 LED Light Therapy For Jaundice

5.2.1 Working Principles of Blue Light for Jaundice

Blue light irradiation is a simple, effective and quick way to treat neonatal jaundice. Jaundice is the high content of bilirubin in the baby's body. Bilirubin can absorb light. Under the action of light and oxygen, the fat-soluble bilirubin is oxidized into a water-soluble product, which can be excreted from the bile or urine. To reduce serum unbound bilirubin concentration. The absorption band of bilirubin is 400-500 nm, especially at the wavelength of 420-440 nm, the photolysis is the strongest, and the wavelength of blue light is exactly between 425-475 nm. The treatment principle of blue light treatment is to convert the bilirubin in the body into other substances by illuminating the light, so that the bilirubin accumulated in the body can find another outlet, and the symptoms of jaundice can be improved.

5.2.2 New Research Results of LED Light Therapy for Jaundice Children

With the increasing popularity of wearable devices and the Internet of Things, their application scope is not limited to 3C consumer products. More flexible and lightweight wearable smart products will be launched in the future. Recently, students at the University of Rhode Island (URI) have developed a medical jumpsuit that combines LED light therapy, so that newborns with jaundice can receive light therapy at home, and doctors can receive their physiological data remotely.

Due to liver or spleen problems, patients with jaundice cannot metabolize bilirubin in the blood normally, causing yellowing of the eyes and skin. At present, the mainstream treatment method for jaundice newborns is the "light therapy box". The lamp in the box is used to break down bilirubin, but the internal baby cannot contact the parents' limbs during the treatment and needs protective glasses to protect the eyes.

The wearable device named "Jaundice Suit" is a baby jumpsuit equipped with hundreds of LED lights, which can cover the arms, legs and torso of the baby, and the jumpsuit can be connected to the Internet to collect physiological data of the human body. The internal LED lights can also be controlled remotely. R & D student Joshua Harper said the device made up for the lack of past equipment.

The built-in LED light in Jaundice Suit can decompose bilirubin in the baby's body and prevent children's eyes from being damaged by light therapy. In medical research, doctors can measure heart rate and activity status remotely, can record data of patients outside the hospital, parents It is easier to participate in care. However, the disadvantage is that it only covers the trunk and limbs, which requires longer treatment time.

The Swiss Federal Institute for Testing and Development of Materials (EMPA) also had similar research results in early November last year. It developed wearable LED light therapy pajamas for newborns with jaundice, using special weaving methods to combine optical fiber with textile technology and use LED settings It is the light source of the optical fiber light guide tube. The weaving angle is controlled so that the light wavelength is maintained at about 470 nm and the skin can be irradiated.

Neonatal jaundice is one of the common symptoms of babies. All countries have invested in related research. With the advancement of LED technology, LED light therapy has also appeared. According to a 2015 study by Aalborg University Hospital in Denmark, blue LED light with a wavelength of 459nm and green pine color LED with a wavelength of 497nm have therapeutic effects on jaundice.

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