How to distinguish the quality of LED display
At present, the application range of LED display is very wide, and there are many LED manufacturers, and the quality of product models is also uneven. So, how should we distinguish the quality of LED display products?
First of all, before distinguishing the quality of LED display products, we must first understand the characteristics of LED displays, and distinguish the advantages and disadvantages of LED display products from the performance.
The performance of the LED display mainly includes the following aspects such as grayscale, refresh rate, and contrast:
Gray scale, also known as color scale or gray scale, refers to the brightness of the display screen, which is the decisive factor for the number of colors displayed on the LED display screen. Generally speaking, the higher the grayscale of the LED display, the richer the colors displayed, the more delicate the picture, and the easier it is to show rich details.
The refresh rate refers to the number of times the electron beam repeatedly scans the image on the screen. The higher the refresh rate, the better the stability of the picture displayed on the LED display, the higher the resolution of the display, and the high-definition picture without delay. People bring a very comfortable enjoyment.
Contrast refers to the measurement of different brightness levels between the brightest white and the darkest black in the light and dark areas of an image. The larger the difference range, the greater the contrast, and vice versa, the smaller the contrast. Contrast affects the vision of LED display screens One of the key factors of the effect. Generally speaking, the higher the contrast ratio, the clearer and more eye-catching the image, and the more vivid and vivid the colors. High contrast is of great help to the clarity, detail performance and gray level performance of the image.
Secondly, to distinguish the quality of the LED display screen, we can also feel it from the intuitive visual effect:
1. The surface flatness of the LED display. The surface flatness of the display screen should be within ±1mm to ensure that the displayed image is not distorted. Partial protrusions or recesses of the screen body will cause dead angles in the viewing angle of the display screen. We can feel whether the flatness of the screen is consistent by looking at the side of the screen and gently touching the surface of the screen with our hands. The quality of flatness is mainly determined by the production process.
2. White balance effect. Through the red, green, blue full-color test and white balance test of the LED display products, we can see whether there is a color cast on the LED display and adjust it in time.
3. Brightness and viewing angle. The brightness of the indoor LED rental screen is generally between 800cd/m2-1200cd/m2, and the brightness of the outdoor LED rental screen must be above 1500cd/m2 to ensure the normal operation of the display screen, otherwise you will not be able to see clearly because the brightness is too low displayed image.