if the display effect of outdoor led display is not clearer, it will directly affect the overall effect of the led display. how can we make the led display screen display more clearly outdoors? the contrast, refresh frequency and gray level of the full-color led display directly affect the display effect of the full-color led display screen.
i. improvement of contrast
contrast is one of the key factors affecting visual effect. generally speaking, the higher the contrast, the clearer the image and the brighter the color. high contrast is very helpful for image clarity, detail representation and gray level representation. in some text and video display with large black-white contrast, high contrast led display has advantages in black-white contrast, clarity, integrity and so on. the contrast has a greater impact on the dynamic video display effect. because of the fast conversion of light and dark in the dynamic image, the higher the contrast, the easier it is for the human eyes to distinguish such conversion process.
two main methods to improve the contrast of display screen
2. reducing the reflectivity of the led display surface is mainly based on the special processing of the led panel and the led light emitting tube, which can reduce the reflectivity of the led panel and improve the contrast of the led display screen. the nx series full-color high-end led display with 4 mm point spacing has been upgraded from 950:1 of the original process to 4000:1, which greatly improves the product’s contrast as a key indicator.
1. improving the brightness of led display screen, the brightness of led display screen is not the higher the better in some situations. for example, if the brightness of the indoor display screen is too high, it will cause light pollution, which will damage the eyesight of the observer.
3. gray level
gray level refers to the series of brightness which can be distinguished from the darkest to the brightest in the single primary color brightness of the led display screen. the higher the gray level of the led display screen, the richer the color, and the brighter the color; conversely, the display color is single and the change is simple. the improvement of gray level can greatly enhance the depth of color and increase the number of geometric layers of image color display. the gray control level of led is 14 bit to 16 bit, which makes the image level resolution details and display effect of high-end display products reach the world advanced level. with the development of hardware technology, the gray level of led will continue to develop towards higher control accuracy.
