In the Internet era, more and more outdoor photo and video advertisements and outdoor dynamic information need to be played. These are not possible with traditional inkjet billboards. At present, only LED outdoor displays can achieve these functions better. According to the "2014 National LED Display Application Industry Annual Development Report", the average annual growth rate of outdoor led display from 2000 to 2014 is about 50%, which fully reflects the value of outdoor led display for the society, and reflects the outdoor led Trends in the use of the display .
Since the area of ​​the outdoor LED display is generally large, the overall power consumption is still relatively large. How to reduce the power consumption of the display screen has become an important topic for the display design. How is the LED display energy-saving? Generally, it is implemented from the aspects of high-brightness led lamp, driver IC, switching power supply, product power consumption design, intelligent energy-saving system design and structural energy-saving design.
Outdoor LED display working principle
But to reduce the power of the LED display, there are several issues that must be addressed:
1. The working voltage of the led lamp is very low, usually 2-3.4V DC, then it is necessary to use the switching power supply to convert the high-voltage AC power of the mains, how to achieve the highest conversion efficiency in the conversion process;
2. The normal LED display module operating voltage is usually 5V DC, and the LED working voltage is 2-3.4V. How to effectively improve the circuit and minimize the voltage of the driving circuit to reduce the loss of voltage on the circuit, thus Reduce unnecessary heat loss and reduce power loss;
3. How to improve the photoelectric conversion efficiency of the LED, in order to ensure the brightness of the display, to reduce the driving current, and finally achieve the purpose of saving power; how to correctly use the brightness of the display, so that the brightness can be saved with environmental changes electricity.
With 11 years of experience and strength in the LED field, Lianchengfa has been working hard to reduce the power consumption of LED display screens when designing LED display screens, and the following solutions are designed and produced for outdoor LED display products:
1. Perform excellent screen heat dissipation design to reduce fan power consumption;
2. Design scientific overall circuit scheme to reduce internal line power consumption;
3. The red, green and blue lights are powered by 3.8V, and the switching power supply efficiency is above 85%.
4. Using ultra-energy-saving IC, extremely low channel turning voltage, VDS=0.2V, significantly reduces the voltage value of the LED drive circuit.
5. Use LEDs that are twice as bright as ordinary LEDs, so that the LEDs require less drive current, ie, lower power consumption, under the same brightness requirements.
6. Adopt intelligent control system, which can automatically adjust the brightness of led large screen according to the brightness of the external environment, so as not to waste power or cause light pollution.
Through the above measures, the power consumption of the outdoor LED display can be greatly reduced, and the effect of light pollution can be reduced. At the same time, the improvement of efficiency and the reduction of heat generation also reduce the light attenuation ratio of the outdoor LED display for a long time.
Lianchengfa outdoor LED display project case
In fact, Liancheng issued an outdoor LED display series products. After taking the above measures, the average power is effectively controlled. Take the outdoor P10 full-color display, the average power is only about 400W/m2, compared with other manufacturers. Compared with 500W/m2, it has obvious advantages and is in the leading position in the industry.
Energy efficiency calculation:
At present, the ordinary P10 outdoor full color screen power is 450W/m2, and Liancheng's full color energy saving screen is 300W/m2. If the customer buys 200m2 Lianchengfa P10 outdoor full color energy-saving screen. Calculated according to industrial electricity consumption of 1 yuan / degree, lighting 12 hours a day, you can get electricity savings of 200 × (450-300) × 0.001 × 12 = 360 yuan per day, one year (by 300 days) can save The electricity cost is 108,000 yuan, and the electricity saving fee is 540,000 yuan in 5 years.
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