In recent years, we have used LED display screens in various fields such as indication, display, decoration, backlight, general lighting and urban night scenes.
There are indoor LED Displays, outdoor LED screens, commercial advertising LED screens, creative LED screens, stadium LED screens, floor tile LED screens, etc. However, do you know how to choose a right LED display screens for your business?
Different companies have different sales strategies. Some companies focus on price wars. Materials, performance, and quality are often unsatisfactory. Don’t be greedy for cheap, buy some low-quality and substandard products, and regret it.
So how can consumers choose a right LED display with in the complicated displays industry environment? The following points for you as a reference for your screening.
The most critical component of the LED displays is the LED device. The general selection criteria are: high brightness, low working voltage, low power consumption, large size, long life, impact resistance and stable performance.
Also refer to:
1. Failure rate
Means that the failure rate of the LED video wall from the beginning of assembly to aging 72 hours before shipment should not be higher than three ten thousandths (referring to the failure caused by the LED device itself )
2. Antistatic ability
LED is a semiconductor device, which is sensitive to static electricity and can easily cause static failure. Therefore, the antistatic ability is very important to the life of the led wall. Generally speaking, the failure voltage of the human body electrostatic mode test of the LED should not be lower than 2000V.
The flatness of the surface of the LED displays should be within 0 ≤ a ≤ 1mm to ensure that the displayed image is not distorted, and local protrusions or recesses will cause a blind spot in the viewing angle of the display.
4. Brightness and viewing angle
The brightness of the indoor full – color LED displays must be above 800cd / m2, and the brightness of the outdoor full – color LED display must be above 3000 cd / m2, to ensure the normal display of the LED displays, otherwise it will be difficult to see because the brightness is too low The displayed image.
If the environment is very bright, please use LED or rear projection first. The level of brightness is mainly determined by the quality of the LED die.
The size of the viewing angle directly determines the amount of space for the viewing area of the LED display, so the larger the better. The size of the viewing angle is mainly determined by the LED chip.
5. White balance effect
The white balance effect is one of the most important indicators of the LED displays. In color science, pure white will be displayed when the ratio of the three primary colors of red, green and blue is 1:4.6:0.16. If there is a slight deviation in the actual ratio, the white balance will be deviated.
The white balance is mainly determined by the LED chip, and the LED chip also affects the color reproduction
6. Color reduction
Color reproducibility refers to the reproducibility of the color of the LED display, that is, the color displayed on the LED display must be highly consistent with the color of the playback source, so as to ensure the realism of the image.
7. Whether there is mosaic or dead spots
Mosaic refers to the small four squares that are always bright or black that appear on the LED display, which is the phenomenon of module necrosis. The number of dead spots is mainly determined by the quality of the LED chip.
8. Whether there are color blocks
The color block refers to the lack of color in a small area; the main reason is the control IC and power supply, and the quality of the control circuit wiring
9. LED display appearance
The appearance of the LED displays is the most intuitive, the most primitive to make the most preliminary evaluation of the quality of the product. The appearance quality can reflect the quality of the manufacturer’s production process and materials.