With the development of society and the progress of science and technology of outdoor advertising, people on the screen of the increasingly high demand, a good LED display is not only related to the quality of life level also involves the advertising effect is effectively spread. So, how to choose a good quality LED large screen has become a lot of buyers need to consider the problem.
The smooth surface of LED display to 0 a in 1mm, in order to ensure that the display image is not distorted, the visual angle of local convex or concave corners of the screen will lead to. The quality of flatness is mainly determined by three aspects: (1) production process and materials; II. Construction of steel works on site; installation quality of display installation team; construction quality decision.
2. brightness and viewing angle
The brightness of indoor full color LED screen in 800cd/m2 above, the brightness of outdoor LED screen to more than 1500cd/m2, in order to ensure the normal display LED display image, otherwise it will because the brightness is too low and can not see the show. The brightness is mainly determined by the quality of the LED core.
The size of the visual angle determines the amount of visual area of the LED screen, so the bigger the better. The size of the visual angle is determined mainly by the LED chip.
3. white balance effect
White balance is one of the most important indicators of LED display. Color on the popular green colors of the ratio of 1:4.6:0.16 only shows the pure white, there is a deviation if the actual percentage point deviation will appear white balance, the general attention to the bias of blue and white or yellowish green. The quality of white balance is decided mainly by LED chip, and the LED chip also has influence on the reducibility of color.
4., the reduction of color
Color reduction refers to the LED display to restore the color, that is, the color of the LED display screen and the source of the color to maintain a high degree of consistency, so as to ensure that the image of the sense of reality.
5. is there mosaic or dead center phenomenon?
Mosaic refers to the display of the LED lit or often black small box, both module necrosis, the main reason is: there is a convex or concave phenomenon of LED used in the display connector quality; the LED lamp is not correct; the sealing glue process unqualified. Dead center is a single black point on the LED screen, and the number of dead centers is mainly determined by the quality of the LED chip.
6. do you have color blocks?
Color block refers to the small area of lack of color, the main reason is to control the power supply of IC and power supply, control circuit, wiring quality
7. display appearance
Display appearance: it is the most intuitive, the most primitive, the quality of the product to do the most preliminary assessment. The quality of the appearance can reflect the quality of the production process and the material of the manufacturer.