How to Judge the Quality of LED Display?

At this stage, more and more outdoor advertising are designated LED display as the first choice, we buy the LED display quality directly determines its service life and overall value. This article will guide you how to judge the better quality of LED display, let’s learn about it together.

Why are LED displays widely used?

When we look carefully, we will find that without realizing it, the side has been “surrounded” by a LED display. Whether it is to go to the mall, clothing stores, or roadside traffic signs, as well as eating restaurants, can see the figure of the LED display.

This is in fact with the quality of the LED display is inseparable. LED display has a very high life and brightness, and good waterproof performance, indoor and outdoor can be used, it is these advantages, so that it can be widely used in our lives.

If, we also want to buy a LED display to use, how should we judge its quality? In fact, we can measure from the following key factors:

Screen brightness

No matter what type of display, the screen brightness is always the most intuitive to see the visual effect. For example, after we turn up the screen brightness, we can feel the screen to bring a blinding effect, the same, if we dim the screen, the screen will be difficult to watch normally.

Unlike other display screens, the brightness value of LED display screen goes up and down greatly, according to the pixel pitch, LED beads, and the influence of encapsulation technology, it can realize the brightness value of 800-8000nits.

Generally speaking, if the LED display is made by COB packaging technology, then its brightness value is usually around 500-1200nits, while the LED display made by DIP packaging technology, then its brightness value can reach more than 8000 nits.

We can observe the LED display in the maximum brightness value, the performance of the screen effect. If the picture distortion is serious and the visual effect is poor, then it means that the quality of LED display is relatively bad.

Color contrast

Contrast is one of the important factors used to influence the picture display effect, a good display can better realize better light and dark effect, making the picture level sense stronger, the effect is more distinct. And high contrast ratio has obvious advantages in outdoor display. Because it can ensure that the picture, in the strong sunlight, can still see very clearly.

Accordingly, the poor quality of the LED display is unable to accurately restore the contrast, so the visual effect of the screen is lacking.

Flatness

The flatness of the LED display determines the uniformity and consistency of the picture. After all, an uneven screen will destroy the original picture effect, and ultimately will naturally make the picture look very twisted.

Good flatness of the LED screen, you should not see any depression or bulging problems, and between each LED screen cabinet can not see any gaps.

For the LED display factory that fails to detect the inconsistency of the flatness of the LED screen in time, in fact, it also shows the side of the LED display factory’s quality inspection link is weak, and the quality of the product is worrying.

White balance

White balance refers to the performance of LED display screen in pure white screen.

Good quality LED display in pure white screen will not appear bluish, yellowish color difference. While the poor quality of the LED display is the opposite.

The reason for this situation is mainly related to the LED control system and the quality of LED beads. For example, the use of different batches of LED lamp beads, or LED screen debugging, parameter setting errors and other reasons resulting in pure white screen color difference.

No dead spots or black spots

Whether it is LCD, or LED display, if there are dead spots and black spots will greatly affect the viewing experience. After all, the screen display area is complete, the sudden appearance of dead spots or black spots will greatly affect the viewing experience of the screen.

Good quality LED display in the factory will be repeated aging and testing to ensure that customers get the hands of the LED display without any dead spots or black spots.

Refresh rate

A high refresh rate ensures that the LED display can be more coherent when reproducing game or movie images, and it can also prevent water ripples from appearing in the captured photos and videos. On the other hand, a low refresh rate can lead to laggy images and noticeable water ripples when shooting.

LED display refresh rates are usually categorized as low refresh, normal refresh and high refresh. Although the difference between the three types cannot be seen through the naked eye, the difference can only be seen when shooting through the camera.

Generally speaking, such as sports venues, concerts and other scenes with high shooting requirements, you need to use high refresh LED display, otherwise the photos will be taken because of the appearance of water ripples and affect the display effect.

Viewing Angle

In order to ensure that the audience can see the same picture from different angles, then a wide viewing angle is indispensable. Some LCD monitors, due to the use of TN panel technology, have a viewing angle of less than 160 degrees, and when the screen is viewed from the side, the picture will appear obvious distortion.

There are very few LED displays on the market that have a viewing angle of less than 160 degrees. If you accidentally stumbled upon, it means that the LED display beads or IC problems, at this time we must keep our eyes peeled, careful shopping.

Response speed

Under normal circumstances, the response speed of a consumer-grade display screen should be less than 8ms. When the response speed exceeds 8ms, we will obviously feel the screen lagging or shadow dragging problem. This problem is not only manifested in the visual, but also seriously affect the operation experience of the game.

To verify whether the response speed of the LED display is within a reasonable range, we can play the video at variable speed to observe the display effect of the LED display on the video. If the screen in variable speed playback, still performs very smooth, then the effect of this screen is naturally very good, on the contrary, it shows that the effect of this screen is very poor.

Summarize

We explain the multiple factors that affect the quality of the LED display, so that we know clearly how to identify the quality of the LED display, and select the best LED display from it.