LED lighting is now expanding from landscape to functional lighting, from outdoor to indoor lighting, and from general to special lighting. This is the inevitable development of technology and society.
Applicable to medical lighting LED light source to meet the requirements of adjustable and controllable, high reliability, and long life. It is the ideal solid-state light source to replace the current halogen, mercury, and xenon lamps.
Since 2010, domestic LED surgical shadowless lamps have been used in some tertiary hospitals and exported to Japan, Australia, the Philippines, and other countries.
LED light source: energy saving, environmental protection, low cost
LED energy-saving artificial light source, using the LED light source to “replace” incandescent, fluorescent, sodium (HID), halogen, mercury vapor lamps, and xenon lamps can save 30% to 80%. Currently, LEDs are a low-cost light source used during the life cycle of the light source.
LED light source technology features
Energy efficiency: To date, among LEDs other than artificial light sources, low-pressure sodium (LPS) lamps have a higher electro-optical conversion energy efficiency of about 140 lm/W. In 2011, laboratory-grade power LEDs have reached a luminous efficiency of 203 lm/W. LEDs are energy-efficient artificial light sources, and the use of LED light sources to “replace “incandescent, fluorescent, sodium (HID), halogen, mercury vapor, and xenon lamps, saving 30% to 80% of energy.
LED light source is a semiconductor solid-state light source (SSL), which is electroluminescent, not thermoluminescent, but cold light. The light source does not contain toxic or hazardous substances.
Traditional light sources such as fluorescent lamps, sodium lamps (HID), mercury vapor lamps, and xenon lamps contain hazardous substances such as mercury, sodium, and cadmium, and their waste can cause environmental pollution.
Energy-saving lamps (fluorescent lamps) contain 5 mg to 10 mg of mercury. Once broken, it will cause severe pollution to water and land. 1 mg of mercury will pollute 5 tons of water. Moreover, the cost of recycling and disposing of the waste of traditional light sources is very high, while LED light sources do not cause environmental pollution and other problems.
Spectrum pure, no harmful spectrum: III-V semiconductor electroluminescence, so that LED radiation spectrum pure, half-wave width of only 20nm ~ 30nm.
Red (R), blue (B), yellow (Y), green (G), and other monochromatic light do not contain ultraviolet (UV) and infrared (IR) light (except UVLED and IRLED). Even multi-color mixed light (e.g., white light (R or other broad-spectrum light colors), its spectrum does not contain UV and IR radiation that is harmful to the human eye and skin. Unlike other artificial light sources (e.g., incandescent, halogen lamps contain 45% to 70% infrared light in their spectrum; fluorescent and sodium lamps contain 15% to 25% UV light in their spectrum, and if left unprotected, the use of such products will result in LED lights being called the health light of the 21st century.
LED light source for the scope of application
UV: UV LED wavelength range of 311nm to 400nm, the wavelength of 20nm to 30nm, the optical power of a few milliwatts to several hundred milliwatts. UVA can deal with skin diseases, such as psoriasis, and can also be used for beauty, sterilization, etc.
Infrared light: LED infrared chips are suitable for manufacturing near-red light devices. IR LEDs in the range of 780nm to 1200nm can be selected for anti-inflammation, pain relief, and metabolism promotion.
Blue light: LED light source in the range of 425nm to 475nm can be used to cure neonatal jaundice, etc. 446nm to 477nm LED light source, can promote the secretion of pineal amine hormone – melatonin and regulate the biological cycle. It is beneficial to the human body and beneficial to enhance the vitality of the human brain.
Red light: red LED can be used as a light source in the range of 615nm to 700nm. The light is pure, and the red light passes through photochemistry to promote cell synthesis, promote wound healing, and cure many diseases.
Mixed light and a white light: the use of LED white light or several different wavelengths of LEDs to mix the light in the same package to form yellow-green light, purple light, blue-green mixed light, etc., can meet the needs of different processing methods. White light exposure with different color temperatures can be used for insomnia regulation curing.
LED light source advantages
With LED light sources, it is possible to build any geometric shape of any size, point, line, and surface light sources, and also miniaturize them. Use LED light sources to form soft light sources and blanket light sources, or even combine with clothing to form wearable light sources. For example, if a blue LED is mounted in a blanket-like baby quilt, it can be used to protect the eyes of a newborn with jaundice without an eye patch.
LEDs can work at DC voltages below 6V, without the electrical safety problems caused by high voltage such as mercury lamps.
The medical literature reports that the use of LEDs as a light source for blue, red, near-infrared, ultraviolet, and multi-color mixed light therapy has achieved significant clinical results. Major companies in the U.S., Japan, and Europe have introduced various phototherapy devices using LED light sources, and many results have been achieved by related companies, schools, and medical institutions in China.
Surgical shadowless lights: LED light source When doctors are generally considered to be able to operate on patients, the heads, hands, and surgical instruments of medical personnel can obscure the surgical site and interfere with the doctor’s visual identification of the surgical site. Therefore, operational lighting must meet shadowless requirements. The shadowless lamp is a large area light source that can shine light from any angle without creating shadows. The cool light and color temperature are adjustable, and the color requirements are high.
Surgical light source: radiation does not contain an infrared spectrum, does not generate heat, medical staff will not feel fatigued, and can reduce the risk of patient injury site infection due to high temperatures.
Since different parts of the human body have different visual clarity at different color temperatures, the color temperature of surgical lighting requires 2700k～6500k, adjustable, and high color rendering. To improve the ability of medical personnel to identify and judge the color changes of diseased tissues and blood.
The light source can be adjusted remotely as needed.
- The lamp arm, lamp head, etc. can be moved up and down and can be controlled remotely, and the size of the light field can also be adjusted.
- Light bulbs can affect air conditioning, clean laminar flow, operating room temperature, and cleanliness. This requires the design of the lamp and the selection of materials to solve the problem.
- Emergency curing
Surgical lighting fixtures must have a power failure emergency function. Once the power is cut, it will immediately switch to battery or backup power. The switchover time is less than 1 minute, noiseless, and the emergency time is 4 hours-6 hours to ensure that no medical errors will result from a power outage.
- No glare
Surgical lighting should not cause flickering or reflected light on surgical instruments, linens, gauze, medical appliances, and other items, which can interfere with the medical staff’s vision and create a glare hazard.
The requirements of surgical shadowless lights are very strict and involve a combination of optical, electronic, microelectromechanical, modeling structures, laminar flow analysis, and colorimetric methods with high technical content. With the popularity of cardiac surgery and foot and ankle surgery, the number of surgical shadowless lights in demand is gradually increasing, and LED light sources are widely recognized due to their outstanding advantages.