1. Brightness indicators
In the purchase of LED display must confirm the use of scenes in advance, is installed in the outdoor or indoor, usually, outdoor light, the LED display brightness requirements are higher, need to be more than 5000cd / m; and indoor light is weak, LED display brightness is too bright, but cause visual fatigue, eye fatigue and other bad experience, LED display indoor scenes are only 1800cd / m m can be.
2. White balance indicators
White balance effect is one of the important indicators of the display, the term white balance is not unfamiliar to everyone, but the real principle, many people do not know much, full-color LED display lamp bead package using three-in-one package, that is, a lamp bead inside the actual red, green and blue three lamp beads integrated together, according to the three primary color mixing principle, to achieve different colors, color science when the ratio of red, green and blue primary colors is 1: 4.6. 0.16 when it will show pure white, the white balance is mainly determined by the control system of the display, the tube core also has an impact on the color reproduction.
3. Grayscale index
Grayscale is related to the brightness, refers to the brightness of the degree of light and darkness of the graded presentation performance, also known as the color scale or gray scale, the higher the grading, LED display are sensitive to the presentation, it requires higher performance of LED and chip control sensitivity, grayscale grading high and low often determines the vividness of the color. Generally speaking, the higher the gray level, the richer the colors presented by the display, the more vivid the viewing effect.
4. Flatness index
Flatness is the overall height of the screen undulation, when touching the LED display, there is no bump, which is called "flatness" in the industry, although many people are easy to ignore this point when buying, but the flatness of the LED display is a good screen. In general, the smaller the flatness, the screen display is more smooth, the more uniform color, the better the viewing effect, the opposite is easy to distort the picture, poor viewing effect.
5. Refresh frequency indicator
Refresh frequency refers to the number of times the screen is refreshed per second, in general, the higher the refresh frequency of the LED display, the more stable and smooth the screen display, and low refresh frequency will not only have unsightly water ripples, the feeling of trailing shadows and lagging, but also affect the eyes, visual fatigue, making people feel uncomfortable. Especially playing competitive games and other LED display devices, refresh frequency is particularly important, directly affecting the experience of the game. So in the selection, try to choose a refresh rate higher than 1,000Hz, if the refresh frequency is higher than 3,000Hz, it can be called high-performance LED display, the effect is better.