How to choose a good outdoor full color :

The critical component of LED display is LED components and parts, and there are three reasons: Firstly,LED components and parts is used the most and every square LED full color display screen will useTens of thousands of led componens and parts; Sencondly, LED display is to determine the optical properties of the entire screen, the main direct impact on audience for the evaluation of the display; Third, LED in the display the largest proportion of overall costs, from 30% to 70%.
LED full color LED display is the most critical components, the equivalent of the computer's CPU. LED options have been decided more than 50% of the entire display quality. If you can not choose a good LED, display and other components can not compensate for even the best display quality defects.
LED full color LED display special quality and parameters can be attributed to the following five elements:
1. the failure rate as full-color display by a group of thousands or even hundreds of thousands of red, green and blue LED pixels composed of the composition, the failure of any color LED display will affect the overall visual effect. In general, according to industry experience, beginning in the LED display assembly to the aging of 72 hours before shipping the failure rate should not exceed ten thousandths (referring to the LED device itself causes the failure).
2.ESD
LED is a semiconductor device, sensitive to static electricity, static electricity can easily lead to failure, so the anti-static capability is essential for life of the display. In general, LED test failure of the human body model ESD voltage not less than 2000V.
3. the attenuation characteristics
Red, green and blue LED are working with time as the increase in light attenuation characteristics. Pros and cons of LED chips, auxiliary materials and packaging technology is good or bad level of attenuation of the LED determines the speed. In general, 1000 hours, 20 mA at room temperature after the test light, red LED attenuation should be less than 10%, blue, green LED attenuation should be less than 15%. Red, green, blue attenuation consistency of the full-color LED display great influence on the future of the white balance, thereby affecting the fidelity of the display screen.
4. the brightness
LED brightness is an important determinant of display brightness. The higher the LED brightness, the greater use of the current margin of power savings, to maintain good and stable LED. LED has a different angle, the brightness has been set in the chip case, the smaller the angle, LED is brighter, but the viewing angle is smaller. General should be chosen to ensure 100-degree LED display sufficient perspective. Different for different point spacing and line of sight of the display should light, angle and price to find a balance. 5, consistency
Full color display is composed of numerous red, green and blue LED pixels makes up the composition of each color LED brightness, the consistency of the wavelength of light determines the consistency of the entire display, white balance, consistency, color consistency sex. In general, the display device manufacturers require suppliers to provide 2.5nm wavelength range and 1:1.3 brightness range of the LED, these indicators can be component suppliers were graded by machine to achieve spectral separation. Consistency is generally not required voltage.
As the LED is angled, so the full color LED display also has a point of orientation, that is, when viewed at different angles, its brightness will increase or decrease. In this way, red, green and blue LED's point of view different angles will seriously affect the consistency of the consistency of white balance, color directly affects the fidelity of the video display. To do the red, green and blue LED brightness variations at different angles to match the consistency, you need to package the lens design, the choice of raw materials, rigorous scientific design, depending on package vendor technology. Even the best method to display the direction of balance, consistency is not good if the LED's point of view,
Different angles of the whole screen white balance is bad. Point of consistency properties of LED devices available LED Tester angle measured for the high-end display is particularly important.