Assess the quality of the LED display should pay attention to what

Evaluation of LED display, mainly pay attention to the following aspects:

1 flatness

Smooth surface display to within less than 1mm, to ensure that the display image is not distorted, the visual angle of local convex or concave corners of the screen will lead to. Flatness is mainly determined by the production process.

2 brightness and visual angle

Indoor full color brightness to above 800cd/m2, outdoor full color brightness to 1500 cd/m2 or more, in order to ensure the normal work of the image display, or because the brightness is too low and can not see the show. Brightness is determined by the quality of the LED core.

How many visual angle depends on the size of the display screen of the audience, so better. The size of the visual angle is determined by the encapsulation of the core.

3 white balance effect

White balance effect is one of the most important indicators 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 white balance is mainly decided by the control system of the display screen, and the core has an influence on the reduction of color.

The reduction of 4 color

The reduction of color refers to the reduction of color display, can display color to color and playback source are consistent, so as to ensure the authenticity of the image.

5 has no mosaic, dead phenomenon

Mosaic refers to appear on the screen lit or black box is often small, module necrosis, the main reason for the display quality of connector.

Dead refers to a single point on the screen appear often bright or often black, the number of dead is mainly composed of a pipe core is determined.

6 has no color

Color refers to the color difference obviously between adjacent module, color transition in modular units, caused by the color phenomenon is mainly controlled by the system is poor, gray level is not high, resulting in lower scanning frequency.