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LED shadowless lamps, as a widely used surgical shadowless lamp, have the characteristics of narrow spectrum, pure light color, high luminous power, low power consumption, and long service life, which are superior to general halogen light sources. Compared with traditional halogen surgical shadowless lamps, LED shadowless lamps solve the disadvantages of low power, poor color rendering, small focal spot diameter, high temperature, and short service life of traditional shadowless lamps. So, what is the function of LED shadowless lights?
LED shadowless light is an indispensable medical device in the surgical department. During the surgical process, it is not only necessary to have “no shadow”, but also to choose lighting with good luster, which can distinguish the color difference between blood and other structures and organs of the human body well. Functional analysis of LED shadowless lamps:

1. Durable LED light source. The ZW series shadowless lamp adopts green and low consumption lighting technology, with a bulb life of up to 50000 hours, which is dozens of times longer than halogen shadowless lamps. The use of a new type of LED cold light source as surgical lighting is a true cold light source, with almost no temperature rise in the doctor’s head and wound area.
2. Excellent optical design. Using computer software assisted design technology to control the three-dimensional installation angle of each lens, making the light spot more rounded; A lens with high efficiency at small angles results in higher light efficiency and more concentrated light.
3. Unique structural design of light source components. The light source board is made of integral aluminum substrate, which reduces a large number of flying wires, simplifies the structure, ensures more stable quality, improves heat dissipation, and has a longer service life.
4. Uniform spot control. The central focusing device can achieve uniform adjustment of the spot diameter.
5. Easy to use color temperature and brightness level functions. PWM stepless dimming, simple and clear system operation interface, flexible design with adjustable color temperature.
6. High definition camera system. By adopting high-frequency pulse width dimming technology, a central/external high-definition camera system can be configured to solve the problem of screen flicker in the camera system.
7. Gesture control, shadow compensation, and other functions provide medical workers with more convenient operations.

Security measures
Considering the special safety requirements of medical devices, corresponding safety measures should be taken at every stage of the system. Firstly, the operating room is a strong environment, and it is very important to prevent the microcontroller from crashing, so the following measures must be taken.
(1) Hardware design and internal reset procedures must be handled with caution;
(2) False interference signals must be eliminated, so the entire system adopts complete electrical isolation to prevent mutual interference between various parts of the circuit. In addition, Modbus redundancy check method is also adopted.
(3) High brightness white LED has a high price. To avoid damage, it is necessary to eliminate the impact of the power grid and damage on the system. Therefore, an overvoltage and overcurrent automatic protection circuit was adopted. When the voltage or current exceeds 20% of the set value, the system automatically cuts off the power to ensure the safety of the system circuit and high brightness LED.