LED is a semiconductor that can convert electrical energy into light energy. It changes the principle of tungsten filament lighting of incandescent lamps and three-color powder lighting of energy-saving lamps, and uses electric field to emit light. According to the analysis, the characteristics of LED are very obvious, such as long life, high luminous efficiency, low radiation and low power consumption. Let's talk about the use of LED display, need to pay attention to several key points of LED.
1. Life
There is a big misunderstanding here. Most people think that the main materials of the screen LED and IC have a lifespan of 100,000 hours. According to 365 days/year, 24 hours/day operation, the service life is more than 11 years, so most customers only care about Use well-known LEDs and ICs. In fact, these two are only necessary conditions, not sufficient conditions, because the rational use of red, green and blue lamps is more important to the display screen. For lamps of different colors, it is necessary to make them work in the best state. A good display is even more important. Reasonable adjustment of the IC also helps to overcome the unreasonable wiring problem of the PCB. Just like a car with a good engine and circuit control may not necessarily be a good car. At the same time, the power supply is also very important. Because the power supply has different working stability, output voltage value and load capacity under different temperature conditions, because it is responsible for logistics support, its support ability directly affects the screen quality.
2. Comply with the national standard
The general specification of LED display screen is a ministerial standard issued in 1995. So far, there are still many companies that claim to meet the national standards. After 8 years of scientific and technological development, the standard at that time is no longer the standard. For example, the out-of-control point, the national standard is 3/10,000, taking φ3.75 indoor dual-color display as an example . Generally, a display screen with a standard resolution of 640x480 is 7 square meters, and each square meter is 43264 points. According to the national standard, there can be 90 out of control points. Who still pays for such a display today?
3. Cost-effective
Provide or require manufacturers to analyze data on project installation and application environment, predict possible incidents and propose preventive and solution measures, and then make a comprehensive evaluation of the entire project plan;
4. Grayscale
Grayscale as a dual-primary and full-color display is an important indicator. There are many 16-level and 64-level grayscale displays on the market today pretending to be 256-level grayscale. Its control cost is only 1/5 of that of 256-level grayscale control. The easiest way is to play a VCD of a relatively intense sports scene to see if it can be seen clearly on the LED display.
Five, buy the best to buy the best
All purchasing power comes from need. Meet the needs and have a certain advance. Blind pursuit will waste a lot of money buying features you don't need.
6. Practicality
The application is the foundation. As the consultation in the application, the software upgrade, hardware maintenance, maintenance and repair cannot be without the support of the manufacturer, clarifying your own needs, investment budget and expected best results. The LEDs used in the LED display are mainly vigilant from the aspects of LED life, LED national standards, cost performance, LED grayscale, and LED practicality to ensure that the LEDs used can achieve the desired effect in the use of LED displays.