How to choose a good LED display?
So how to choose a good quality LED screen has become a problem that many buyers need to consider. Below, from the following key factors to analyze this problem:.
1. flatness
LED display surface flatness should be within 0 ≤ a ≤ 1mm to ensure that the display image is not distorted, localized raised or concave will lead to the display of the visual angle of the dead angle. The flatness of the good and bad is mainly determined by three aspects: ① production process and materials; ② on-site steel engineering construction; ③ display installation team installation construction quality decision.
2. Brightness and viewing angle
The brightness of indoor full-color LED display should be more than 800 cd/m2, and the brightness of outdoor full-color LED display should be more than 1500 cd/m2, in order to ensure the normal display of the LED display, otherwise it will not be able to see the displayed image because of the brightness is too low. The brightness is mainly determined by the LED tube core.
The size of the visual angle directly determines the LED display visual area space, so the bigger 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. Color science when the ratio of red, green and blue three primary colors for 1:4.6:0.16 will show pure white, if the actual proportion of a little deviation will appear white balance deviation, generally pay attention to the white whether there is a bias blue, bias yellow-green phenomenon. White balance is mainly determined by the LED chip, the LED chip also has an impact on the color reproduction.
4. Color reproducibility
Color reproducibility refers to the LED display of color reproduction, that is, the color of the LED display should be highly consistent with the color of the broadcast source, so as to ensure the realism of the image.
5. Whether there is a mosaic, dead spot phenomenon
Mosaic refers to the LED display on the appearance of often bright or often black small quadrangle, both module necrosis phenomenon, the main reason for: ① LED display used in the connector quality is not pass the phenomenon of raised or concave; ② LED lights are not dialed; ③ sealing glue process is not qualified. Dead spot is a single point on the LED display screen appears often black, the number of dead spots is mainly determined by the LED chip is good or bad.
6. With or without color block
Color block refers to the lack of color in a small area; the main reason is the control IC and power supply, control circuit wiring quality.
7. Display appearance
Display appearance: is the most intuitive, the most original product quality is good or bad to do the most preliminary assessment. Appearance quality can reflect the manufacturer's production process and the quality of materials.
