Hong Kong R & D PFM control LED bulbs are more environmentally friendly and energy efficient (Figure)

It is understood that Hong Kong is one of the brightest cities in the world, and it consumes a lot of energy in general lighting and advertising and decorative lighting. In recent years, all walks of life in Hong Kong have been paying attention to energy efficiency and related environmental protection issues. Enterprises and individuals participating in the "Earth Hour" global energy conservation activities are gradually becoming more active. It is obvious that the development of environmentally friendly lighting is the general trend.
Lighting new technology LED (LED) is definitely the love of environmentalists. LEDs are not only extremely long-lived, but also durable, small in size, and quick in switching. The lighting technology developed from LEDs has extremely high energy efficiency. More importantly, LED lighting has very low carbon dioxide emissions. In addition, unlike LED light-saving bulbs, LEDs do not contain mercury and can be disposed of as general waste when discarded, without causing special damage to the environment; moreover, it is ten times longer than power-saving bulbs. This shows that LED is the best choice for environmentally friendly lighting.
The LED bulb is illuminated by the movement of the electrons, and its light is not so dazzling and therefore not glaring. LED lights need to be lit by LED drivers. The purpose of this driver is to provide a stable and reliable power supply to the lamp, which makes the LED lamp more efficient and compatible with other lighting devices. With the driver, the LED lamp can be used anywhere. Even the commonly used halogen bulbs can be directly replaced.
The LED lighting technology of the Hong Kong Applied Science and Technology Research Institute has matured and can contribute to the promotion of environmentally friendly lighting. Recently, ASTRI IC Group has developed a small LED driver for general lighting facilities such as MR16 LED bulbs. This technology has been successfully transferred to the industry. It is expected that the market demand for LED lighting products will increase in multiples in the next few years.

LED light with built-in PFM control driver
The current of an LED bulb can be adjusted by two types of control methods: pulse width modulation (PWM) and pulse frequency modulation (PFM). The PWM control mode is a set of control calculation mode, and the controlled signal is modulated into a pulse signal, which is the ratio of the duration of the positive pulse to the total pulse period, since the pulse signal is a fixed frequency signal. It has powerful energy at a specific frequency or can affect other electronic devices. On the other hand, in the PFM control mode, the controlled signal is modulated into the frequency of the pulse signal, and its energy is thus dispersed over a wide spectrum, posing no threat to the device being affected.
Replacing general lighting equipment The LED driver of the Hong Kong Applied Science and Technology Research Institute uses PFM to control the current of the bulb. The modulated current is controlled by a PFM controller, which not only ensures the bulb is compatible with other electronic devices, but also reduces electromagnetic interference. In addition, ASTRI's LED drivers also have a number of features:
(1) High efficiency and high volt input: This LED driver can output current 350mA to 1A at an operating voltage of 30V, with an efficiency of up to 95%; (2) High accuracy: current is modulated in the program current percent Dimming: (3) Dimming: Since dimming is an important element of general lighting, ASTRI's LED drivers also have a variety of dimming methods, such as dimming through PWM signals or DC signals. LED lamp replaces the inefficient lighting equipment currently in use; (4) Complete protection: LED drive appliance protection performance, protected from overheating or excessive current damage; (5) Low cost: simple drive structure, small steel mold, in the Mainland The foundry is oxygen-made, so the cost is low, and it is suitable for portable high-brightness lighting systems.
Compared with the lighting methods currently in use, LED lighting technology is more environmentally friendly, more energy efficient, more economical, and LED bulbs are compatible with other electronic devices. It is believed that LED lighting will become the glory of future lighting equipment. 390 million yuan LED industrialization project put into production in Shijiazhuang Information Industry Base Next: Japanese and Korean manufacturers force LED lighting market to focus on indoor lighting

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