How to identify the merits of full-color LED display

In simple terms, a full-color led street lighting Manufacturer is good or bad can mainly be identified from the following aspects:
1. surface flatness flatness LED display to within ± 1mm, in order to ensure the displayed image is not distorted, partial raised or recessed will lead to the display viewing angle appears dead. Flatness is mainly determined by the quality of the production process.
2. brightness and viewing angle brightness indoor full color to the 800cd / m2 or more, outdoor full color brightness to the 1500cd / m2 or more, in order to ensure the normal operation of the display, otherwise it will be too low and can not see because of the brightness of the image display. Size of the brightness by the LED die is good or bad decisions.
How much screen size of the audience directly depends on the viewing angle, and therefore the bigger the better. Mainly by the size of the viewing angle of the die packages to decide.
3. The balance effect balance effect is one of the most important indicators of the display. Red, green and blue color science fooled ratio of 1: 4.6: 0.16 out of pure white will show, if the actual proportion of the white balance a little deviation deviation occurs, usually pay attention to whether there are bluish white, yellow green phenomenon. White balance is good or bad is determined by the display control system, the die for the reduction of color is also affected.
4. The reduction of color refers to the color of reducing color display for color reduction, both display a high degree of consistency with the source of the color, so as to ensure that the image realism.
5. whether the mosaic, Mosaic is dead phenomenon refers to appear on the display lit or normally four small black box, both modules necrosis, mainly due to the quality of its display connectors used, but off.
Always refer dead appear on the led street light wholesale or normally black single point, how good or bad from the die to determine the dead point.
6. color color refers to the presence or absence obvious color difference between adjacent modules, the transition to color module as a unit, the color phenomenon is mainly caused by poor control systems, the gray level is not high, scanning lower frequency caused.