China's lighting products for medical use (except functional lighting) and production and technology levels are generally low, brand concentration is not high, most hospital medical lighting products are purchased from abroad, such as Germany Martin, Chuanghu and other brands The market is almost monopolized by foreign companies. Although the number of medical lighting products is less than that of common lighting, it is expensive and has a high market value, which deserves attention.
In China, the medical lighting industry belongs to the medical device industry. According to 2008 statistics, there are more than 7,300 companies in the country engaged in the production of medical devices, but less than 3% of the companies that can produce medical lighting products, and most companies only produce low-end products such as viewing lights. Until recently, medical lighting products using LEDs as light sources have appeared and been applied.
With the emphasis on health care, medical rehabilitation, environmental protection and energy conservation in the society, since 2007, China's LED medical lighting has started. However, due to the high barriers to entry of products, the technical risks are high, and most medical device companies do not know much about LED performance and use technology, and the lighting products for medical use involve medical mechanisms, light, machine, electricity, heat and other composite technologies. Only a small number of large companies cooperate with medical institutions to produce such products. In addition, the medical lighting product certification process is complicated, so LED medical lighting is not progressing well and is not suitable for the needs.
At present, there are nearly 3,000 LED companies in China, many of which have strong research, development and production capacity in LED landscape lighting and functional lighting products. However, they lack access to the medical device industry.
According to the Ministry of Health's "Statistical Bulletin on Health Care Development", in 2008, there were 278,000 medical and health institutions in China, including more than 20,000 hospitals, more than 60,000 health centers, and more than 170,000 street and community clinics. These units currently use traditional light source lighting devices, and the market scale is very large. Only in terms of energy saving, the upgrading of medical lighting based on semiconductor lighting technology has become inevitable.
However, it must be known that medical lighting belongs to medical equipment, has strict regulations and certification requirements, and is extremely strict in terms of technology and safety rules. Compared with ordinary functional lighting, the technical risk is greater. To this end, the approval of access licenses for production enterprises should be more stringent, but should not exclude non-medical equipment companies, such as licensing LED lighting companies to enter the field.
LED lighting is currently moving from landscape lighting to functional lighting, from outdoor lighting to indoor lighting, from general lighting to special lighting, which is inevitable for technological advancement and social progress.
The LED light source suitable for medical lighting meets the requirements of adjustable, controllable, high reliability and long life, and is the best solid light source to replace the current halogen lamp, mercury lamp and xenon lamp.
Since 2010, domestic LED surgery shadowless lamps have been applied in some top three hospitals and exported to Japan, Australia, the Philippines and other countries.
LED light source: the lowest cost of energy saving and environmental protection
LED is the most energy-saving artificial light source. It can save 30%~80% energy by replacing the incandescent lamp, fluorescent lamp, sodium lamp (HID), halogen lamp, mercury vapor lamp and xenon lamp with LED light source. Currently, LEDs are the lowest cost source of light during the life of the light source.
Technical characteristics of LED light source
Energy saving: Up to now, among the artificial light sources other than LEDs, the highest energy efficiency of electro-optical conversion is low pressure sodium lamp (LPS), which is about 140 lm/W. In 2011, the level of power LED light efficiency laboratory has reached 203lm / W. LED is the most energy-saving artificial light source. It can save 30%~80% energy by replacing the incandescent lamp, fluorescent lamp, sodium lamp (HID), halogen lamp, mercury vapor lamp and xenon lamp with LED light source.
Environmental protection: LED light source is semiconductor solid-state light source (SSL), which is electroluminescence, not thermal luminescence, cold light, no toxic and harmful substances in the light source; traditional light sources such as fluorescent lamps, sodium lamps (HID), mercury vapor lamps, xenon lamps Others contain harmful substances such as mercury, sodium, and cadmium, and their wastes cause pollution to the environment. An energy-saving (fluorescent) lamp contains 5mg to 10mg of mercury. Once broken, it will cause serious pollution to water and land. 1 mg of mercury can contaminate 5 tons of water. Moreover, the cost of traditional light source waste recycling is also extremely high, and the LED light source does not have problems such as environmental pollution.
Spectral purity, no harmful spectrum: III-V semiconductor electroluminescence, making the LED radiation spectrum pure, half-wave width only 20nm ~ 30nm. Monochromatic light such as red (R), blue (B), yellow (Y), and green (G) does not contain ultraviolet (UV) and infrared (IR) (except UVLED and IRLED). Even multi-color mixed light, such as white light (R or other wide-spectrum light colors, does not contain UV and IR light radiation that is harmful to human eyes and skin. Compared with other artificial light sources, such as incandescent lamps, halogen lamps The spectrum contains 45% to 70% of IR light; both the fluorescent lamp and the sodium lamp contain 15% to 25% of UV light. If this type of product is used, if it is not protected, it will cause light pollution to the user. Known as the light of health in the 21st century.
Easy to implement intelligent control: LED response is fast, easy to color (color temperature), dimming (optical power) and light projection direction adjustment, easy to achieve intelligence, constitute a smart light source.
Because it is a semiconductor light-emitting device, the LED transient response is only ns, and can be driven at a frequency of several tens of kilohertz to hundreds of kilohertz. There is no stroboscopic which causes visual fatigue. Because of this, it is easy to implement digital and intelligent control. LEDs can be easily implemented if the color temperature of the light source (CCT), which is difficult to achieve with other artificial light sources, is continuously adjusted. This is important for observing the clarity of different lesions, different tissues, and blood color in surgical illumination and surgical debridement.
The LED is a low-voltage driven light source, which is safe and reliable: the LED light source is driven by a low voltage, and can be instantaneously transferred into the battery during emergency lighting. The conversion time is only a few tenths of a second, which will not cause an accident due to power failure. And the LED light source is fast converted, and there is no noise of the emergency generator during the conversion process.
The LED drive power supply device can meet the international and domestic standards for medical devices. Such as EN60601-1-2, UL60950, IEC68-2-29 and 3C, as well as certification requirements for electrical safety and electromagnetic interference of medical equipment.
LED is a light source with high reliability and long life cycle: LED is a solid light source with high reliability and long life. Its 30% light decay time (ie life determination time) can be at -30°C～+55°C ambient temperature. Work, life time of up to 30,000 hours to 50,000 hours, is currently the longest life source of artificial light source. (The life of an incandescent filament is about 2,000 hours, the fluorescent lamp is 8000 hours, and the sodium lamp and mercury vapor lamp are only about 10,000 hours).
LED is currently the lowest light source in the life cycle of the light source, the cost of use (refer to the sum of the cost of purchasing energy + maintenance and replacement + replacement during the life cycle).
Insufficient traditional light source
At present, the artificial light source and LED light source commonly used in the medical field, in addition to the above-mentioned basic characteristics such as energy efficiency, spectral purity, color temperature regulation, response time, reliability, life time and life cycle cost, are summarized as follows. .
Mercury vapor discharge light source - vapor blue light, etc.:
It needs to be powered by high voltage, slow response, containing UV and IR light radiation; it is a heat source, which will cause the surface to be heated, and must be protected when used; mercury is not conducive to waste disposal.
Solid-state laser source - He-Ne laser, etc.:
The cost is high, the power supply system is complicated, and it needs to be protected when used, and the safety is poor; when the power is large, the water cooling technology is required to dissipate heat, and the safety is poor.
Halogen lamps, xenon lamps, etc.:
Containing IR radiation, it is a heat source; if necessary, it is necessary to provide a lens for filtering IR, or to apply an IR absorption film on the mirror, and the life cycle is high.
LED light source medical application: a wide range of advantages
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