The display effect of LED display screen is related to many factors, such as brightness, dot spacing, flatness of the screen, attenuation and failure rate of the lamp beads, and use environment. So, what is the specific criterion? Let's take a look!
First, the screen flatness and screen surface reflectance
Led display partially raised or recessed will cause the display screen's visible angle to appear dead angle, the surface flatness should be within ±1mm, in order to ensure that the display image does not appear to be distorted, the top-up photoelectric LED display panel through the panel and the LED light-emitting tube The special process can reduce the reflectivity of the LED panel while ensuring the flatness of the screen surface, and can also improve the contrast of the display screen (the higher the contrast, the easier the eyes of a person can distinguish the light and shade conversion process in the dynamic image).
Second, LED display gray scale
Gray scale refers to the brightness level of the single-color brightness of the full-color led display screen, which can be distinguished from the darkest to the brightest. The higher the gray scale, the richer the color and the brighter the color; otherwise, the display color is single, changeable. simple. The increase in gray level can greatly increase the color depth, so that the display level of the image color increases geometrically. Expand the LED display, using high-quality led lights, gray level up to 16384 level, low light and high gray, the screen is more clear and vivid, the picture quality is more delicate.
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Third, the distance between points
The effect of dot spacing on sharpness is very obvious. The smaller the dot spacing, the finer the screen display. The reduction in the distance between points must have mature technology as the core support. From the current trend, the reduction in the distance between points is an inevitable choice for the market. However, relatively speaking, the smaller the distance between points, the greater the cost of its investment, the higher the price.
Fourth, lamp beads quality and failure rate
The LED display consists of 10,000 or even hundreds of thousands of red, green and blue LED lamp beads. LED lamp beads slowly decay with the use of time. LED lamp brightness decay speed and LED chip, auxiliary materials, packaging process have a certain degree of correlation. In general, after 1000 hours and 20 mA normal temperature lighting test, the attenuation of red LED lamp beads should be less than 7%, and the attenuation of blue and green LED lamp beads should be less than 10%. The consistency of red, green, and blue attenuation has a great influence on the white balance of the full-color LED display in the future, and thus affects the display fidelity of the display. At the same time, good lamp beads have a low failure rate, and even if the aging rate is 72 hours, the failure rate will not be higher than one ten-thousandth.
Fifth, the use of stability and safety
When the LED display is in operation, the stability and safety are particularly important. The design of the LED display cabinet is very important. The increase in the temperature of the thermal conversion of the components will result in the degradation of the image quality. Therefore, a good ventilation and heat dissipation design is an indispensable and important indicator in the design of the cabinet. On the one hand is its circuit protection, on the other hand is the safety, as well as the role of dust, waterproof. At the same time, the matching power supply can not only look at the low price and ignore its performance and quality. The power supply under different temperature conditions, its working stability, output voltage and load capacity will be different because it serves as a post-sale protection. Therefore, its safety performance directly affects the quality of the picture.
After ensuring that the above five points, you want the led display to achieve the best display, but also to ensure a good use of the environment, if the actual working temperature exceeds the product's scope of use, not only its life will be shortened, the product itself will be Serious damage. Shooting should pay attention to the best shooting distance, different point spacing, different filling factor led screen, the appropriate shooting distance is not the same. If the person is too close to the screen, when shooting close-up shots, the background will appear grainy, it is easy to produce moire, in the indoor environment need to adjust to the appropriate color temperature, only with the indoor lighting color temperature in order to get accurate in shooting Color reproduction.
Reminder: When users purchase LED display products, they should choose a regular LED display manufacturer. In this way, whether in the LED display quality, price or after-sales service, will be more secure, rest assured!
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