Most portable systems today use white light-emitting diodes (W LEDs ) to backlight the display and keyboard. Video, gaming, and Internet browsing applications require the display and keyboard lights to illuminate for extended periods of time, which reduces the battery life of the device. System architects must balance power consumption and long-term autonomous work requirements to meet user expectations for device usage.
Simply improving some efficiency and then hope to increase the system's independent working time is not enough. Therefore , the product development strategy in LED lighting power supply is to develop an intelligent method to manage the brightness of WLED according to ambient light intensity .
The Intelligent Lighting Management System (LMS) helps system architects increase the efficiency of their power systems by allowing the device to automatically monitor ambient light levels and adjust the brightness of the LEDs based on changes in ambient lighting, while automatically adjusting the LED drive voltage to match the actual diode forward. Voltage, which further reduces power consumption. This integrated architecture minimizes the CPU processing required for ambient light monitoring and LED brightness control, helping to save energy. LMS with intelligent lighting management can increase battery life by 20% to 50%.
In the past 25 years, the global lighting industry has undergone several changes, from traditional incandescent lamps to fluorescent lamps (usually fluorescent lamps) that are commonly used today, and later experienced energy-saving fluorescent lamps and LED lighting that is currently being promoted . These changes are all towards a target line with the former, that is the pursuit of higher luminous efficiency to conserve power, thereby reducing power consumption.
In traditional incandescent and fluorescent applications, semiconductor devices do not have much use, but in LED lighting, semiconductor devices have been widely used and widely used. For example, LEDs require driver chips and voltage conversion chips, and current and voltage detection are required for high-end applications, so that semiconductor devices such as converters and amplifiers can also be applied.
In short, with the pursuit of high luminous efficiency in the lighting industry, the application of semiconductor devices will become more and more extensive. In the future, people will pay more attention to the influence of light source on human vision while paying attention to luminous efficiency. Therefore, it is expected that more applications will be brought about in the control of light source wavelength and illumination in the future .
The key to LED drive power design : precise control of current flow
One of the challenges of LED drivers is to limit the current flowing through the LEDs over a wide range of operating conditions regardless of the input/output voltage. At the same time, the difference in batch and forward voltage caused by the current LED process, ambient temperature and drive current Changes, LED connection methods (parallel or series), will cause LED brightness and color point changes. Therefore, in the design of the LED driver power supply, precise control of the current flowing through the LED is critical for high-end design applications.
Under the pressure of great health, environmental protection and energy crisis in the world, the development trend of the future lighting industry will develop towards energy conservation, health, environmental protection and green. Because with the acceleration of the urbanization process, the market demand for LED road lighting will be huge, and the sustainable development of the city and the concept of “better life in the city†are increasingly demanding for the energy-efficient lighting of LED road lighting products. The higher.
In addition, the market demand for high-power LED power supplies is still very large. LED demonstration application street lights, LED full color display, solar LED, landscape lighting, consumer electronic backlight, signal, indication and other applications are still the main application areas of future market demand.
Ceramic fuses are made by porcelain and some metal materials. When a circuit breaks down or is abnormal, the current increases with the current and the increased current may damage some important components in the circuit, and it may also burn the circuit and even cause a fire. Fuse is small safety part in an electrical device or piece of machinery that causes it to stop working if the electric current is too high, and so prevents fires or other dangers. Fuse in the abnormal current increases to a certain height and heat, its own fuse to cut off the current, to protect the safe operation of the circuit fuse protection power equipment with current overheating damage, avoid electronic equipment serious damage caused by internal fault. If correctly placed in the circuit fuse, the fuse will be abnormal current increases to a certain height and heat, its own fuse to cut off the current, so as to protect the safe operation of the circuit.
Auto Ceramic Fuses
Auto Ceramic Fuses,Ceramic East Europe Fuse,Car Fuse Ceramic,Ceramic Fuse
Heshan Jianhao Lighting Industrial Co., Ltd. , http://www.sunclubtw.com