How to choose a good quality LED display?
LED display: It is composed of LED dot matrix and led pc panel. The red, blue and green LED lights are turned on and off to display text, pictures, animations and videos. The content can be replaced at any time. Each part of the components is a modular structure display device. The traditional LED display usually consists of a display module, a control system and a power supply system. The display module is composed of a dot matrix composed of LED lights, which is responsible for light-emitting display; the control system controls the on-off of the corresponding area.
The screen can display text, pictures, videos and other content. The monochrome and two-color screens are mainly used to play text, and the full-color screen is mainly used to play animations and videos. The power system is responsible for converting the input voltage and current into the voltage and current required by the display. The reason why the LED display has been widely valued and developed rapidly is inseparable from its own advantages. These advantages are summarized as: high brightness, low operating voltage, low power consumption, large size, long life, shock resistance and stable performance.
The development prospect of LED display is extremely broad, and it is currently developing in the direction of higher brightness, higher weather resistance, higher luminous density, higher luminous uniformity, reliability and full color. Since the full-color display is composed of tens of thousands or even hundreds of thousands of pixels composed of three types of red, green and blue LEDs, the failure of any color LED will affect the overall visual effect of the display. Generally speaking, according to industry experience, the failure rate from the start of assembly to aging 72 hours before shipment should not be higher than 3/10,000 (referring to the failure caused by the LED device itself). LED is a semiconductor device, which is sensitive to static electricity and can easily lead to static electricity failure. Therefore, the anti-static ability is very important to the life of the display screen. Generally speaking, the failure voltage of LED’s human body electrostatic mode test should not be lower than.
Circuit board: There are many circuit board manufacturers. Shenzhen is a gathering place for electronic products. It is very fast to purchase raw materials. The circuit board is divided into two layers. The thickness of the four-layer board and the two-layer board is 1.6. The thickness of the four-layer board is 2.0. What affects the quality of the circuit board is the conductor inside the circuit board. The thickness of the conductor should reach the standard thickness of more than 1ns, because the LED display is in use The temperature rises and falls during the process. If the conductor is thin, it is easy to fuse during use, which will cause a large area of quality problems.