How to distinguish full-color LED display is good or bad?

How to choose LED display? Select LED display indicators? Now, with the advancement of social science and technology and the development of outdoor advertising, people's demand for outdoor media is also getting higher and higher, so LED large screens begin to surface. LED large-scale display screens are the perfect combination of technology and media. The application of products involves financial securities, sports, airports, railways, stations, road traffic, commercial advertising, post and telecommunications, and many other fields. How to choose a good quality LED screen is a problem many buyers need to consider. Here are some key aspects of the LED screen:

1. Flatness The surface flatness of the LED display should be within 0 ≤ a ≤ 1mm to ensure that the display image does not distort, and the local bulge or indentation can cause a blind angle in the viewing angle of the display screen. The degree of smoothness mainly consists of 1 production process and materials; 2 site steel construction; 3 display installation team to determine the quality of installation and construction.

2. Brightness and viewing angle The brightness of indoor full-color LED display should be above 800cd/m2, and the brightness of outdoor full-color LED display should be above 1500cd/m2 to ensure the normal display of LED display, otherwise The brightness is too low to see the displayed image. The brightness is mainly determined by the quality of the LED die.

The size of the viewing angle directly determines the size of the visible area of ​​the LED display, so the larger the better. The size of the viewing angle is mainly determined by the LED chip.

3. White balance effect White balance effect is one of the most important indicators of LED display. In color science, when the ratio of the three primary colors of red, green, and blue is 1:4.6:0.16, pure white color will be displayed. If the actual proportion is slightly different, there will be a white balance deviation. Generally, it should be noted whether the white color is bluish or yellowish. Green phenomenon. The white balance is mainly determined by the LED chip, and the LED chip also affects the reproducibility of color.

4. Reducibility of the color Reducibility of color refers to the reduction of the color of the LED display screen, and the color of the LED display screen should be highly consistent with the color of the playback source, so as to ensure the realism of the image.

5. There is no mosaic, dead point phenomenon Mosaic refers to the LED display screen appears on the light or often black small four-square, both module necrosis phenomenon, the main reason is: 1 LED display connector used by the quality but there is Raised or recessed phenomenon; 2 LED lights are not dialled; 3 sealing adhesive process failed.

The dead point refers to a single black point on the LED display. The number of dead spots is mainly determined by the quality of the LED chip.

6. There is no color block refers to a small area lack of color; its main reason is the control IC and power supply, control circuit cable quality

7. Display Appearance Display Appearance: It is the most intuitive and most primitive assessment of product quality. The appearance quality can reflect the manufacturer's production process and material quality.