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Common misunderstandings of outdoor p8LED display purchase
Common misunderstandings of outdoor p8LED display purchase
First, the life of 100,000 hours
The technical data issued by the LED material manufacturer indicates that the life of the LED illuminator is 100,000 hours under ideal conditions. The ideal state refers to the time during which the LED illuminator emits light from illuminating to no illuminating under constant voltage and constant current in the laboratory, and is equivalent to 100,000 hours for 10 years.
The amount of water in a wooden barrel is determined by the lowest board. The LED display currently uses civilian-grade devices and has a service life of no more than 8 years. As the function of the display is to watch, when the display is lit only at night to see clearly, it is impossible to explain that it is qualified and useful.
A car can be opened for 15 years, and if it is idle for 3 years, it will be scrapped. The environment and method of use have a significant impact on the life of the product.
Second, comply with the national standard
The general specification for led display is the 1995 ministerial standard. Many companies have so far claimed to be in line with national standards. It is no longer a standard to look at the standards at that time after eight years of technological development. For example, the out-of-control point, the national standard is three-thousandths, taking the φ3.75 indoor double-primary display as an example. Generally, the display screen with 640x480 standard resolution is 7 square meters, 43264 points per square meter, and there are 90 out of control points according to the national standard. Who is paying for such a display today?
Third, the software is free
The display industry is ubiquitous in the common problems of Chinese companies - only production is not developed. Currently only a few companies have genuine software. It is illegal to use piracy now.
Fourth, the price is low
It depends on the performance price ratio rather than simply looking at the price.
Five, gray level
Grayscale as a dual primary color and full color led display is an important indicator. The current market is flooded with 16-level and 64-level grayscale displays that pretend to be 256 shades of gray. Its control cost is only 1/5 of the control of 256 levels of gray. The easiest way is to play a VCD of a more intense sports scene to see if it can be seen clearly on the led display.
Six, you must be satisfied to buy
All purchasing power comes from needs, meets needs and has a certain lead. Blind pursuits will waste a lot of money to buy features that you don't need.
Led display has been widely used in various fields such as indication, display, decoration, backlight, general lighting and urban night scenes in recent years. It is roughly divided into: LED indoor engineering screen, LED outdoor engineering screen, LED commercial advertising screen, LED creative screen, LED stadium screen, LED floor tile screen, LED color screen, etc.
Different companies have different sales strategies. Some companies focus on price wars, materials, performance, quality are often unsatisfactory in all aspects, do not covet cheap, buy some low quality unqualified defective products, regret it.
So how do consumers choose a product that they are satisfied with in the complicated LED display industry environment? The following small series for you to summarize a few points, as a reference for your screening:
The most critical component of the led display is the LED device. The general selection criteria are: high brightness, low operating voltage, low power consumption, large size, long life, impact resistance and stable performance.
Second, please refer to:
Failure rate
Refers to the led display began to assemble to aging 72 hours before shipment, the failure rate should be no more than three ten thousandth (refer to the failure caused by the LED device itself)
2. Antistatic ability
LEDs are semiconductor devices that are sensitive to static electricity and can easily cause electrostatic failure. Therefore, antistatic capability is critical to the life of the display. In general, the LED's human body static mode test failure voltage should not be lower than 2000V.
3. Flatness
The flatness of the surface of the led display should be within 0 ≤ a ≤ 1 mm to ensure that the displayed image is not distorted, and partial bulging or recessing may cause a blind angle in the viewing angle of the display screen.
4. Brightness and viewing angle
The brightness of the indoor full-color LED display should be above 800cd/m2, and the brightness of the outdoor full-color LED display should be above 1500?cd/m2 to ensure the normal display of the led display. Otherwise, the brightness will be too low. Clear the image displayed. If the environment is very bright, please prefer LED or rear projection. The brightness is mainly determined by the quality of the LED die.
The size of the viewing angle directly determines the amount of visible space of the outdoor led display , so the bigger 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 display. In color theory, when the ratio of the three primary colors of red, green and blue is 1:4.6:0.16, pure white will be displayed. If there is a slight deviation in the actual ratio, the deviation of white balance will appear. The quality of the white balance is mainly determined by the LED chip, and the LED chip also has an effect on the color reproduction.
6. Color reduction
The redness of color refers to the redness of the LED display. The color displayed on the led display should be consistent with the color of the source, so as to ensure the realism of the image.
7. There is no or dead point
Mosaic refers to the always-on or often black small four-squares appearing on the LED display screen, which is a necrosis of the module. The number of dead points is mainly determined by the quality of the LED chip.
8. There are no color blocks
Color blocks refer to small areas lacking color; the main reason is the control IC and power supply, control circuit cable quality.
9.led display appearance
The appearance of the led display is the most intuitive, the most original one is the most preliminary evaluation of the quality of the product. Appearance quality can reflect the quality of the manufacturer's production process and materials.