LED display has been developing rapidly in the world since the 1980s, and its performance indicators have been gradually improved and constantly improved. At present, LED display screens are commonly used outdoors and indoors. How to choose a high-performance LED display screen? Let's briefly introduce the performance of LED display screens.
The brightness level that can be distinguished from the darkest to the brightest in the same brightness level of the LED display screen. Gray scale is the so-called color scale or gray scale, which refers to the degree of brightness. For digital display technology, gray scale is the decisive factor of the number of display colors. Generally speaking, the higher the gray level of LED display screen, the richer the color, and the more gorgeous the color; On the contrary, the display color is single and the change is simple.
At present, the domestic LED display mainly adopts 8-bit processing system, i.e. 256 (28) gray levels. A simple understanding is that there are 256 brightness changes from black to white. The RGB three primary colors can be used to form 256 × two hundred and fifty-six × 256 = 16777216 colors. The international brand display screen mainly adopts a 10 bit processing system, i.e. 1024 gray levels. The RGB three primary colors can form 1.07 billion colors.
The wavelength determines the dynamic color gamut range of the display screen. The three colors of LED full-color display are measured by wavelength. High quality LED full-color display should have a wide color gamut.
3. Frame change frequency:
Frequency of LED display screen information update. It is generally 25Hz, 30Hz, 50Hz, 60Hz, etc. the higher the frame change frequency, the better the continuity of the changed image.
4. Refresh frequency:
The reciprocal of the time required to display a frame of images. Take the display screen as a luminous light source, that is, the flashing frequency of the light source. We can directly test the flicker frequency of the light source of the display screen with an instrument similar to the "light sensing frequency meter" to reflect this indicator. The LED display displays the number of times the data is repeatedly displayed per second. It is usually 60Hz, 120Hz, 240Hz, etc., so it is necessary to maximize the refresh frequency to ensure the stability of the display screen
The above points are just a simple description of the characteristics of several LED displays, and there is no method to verify whether the LED displays meet the requirements of stability, reliability or life in a short time. The producer can make a guarantee, but it can not replace the requirement. It is a commercial concept, a contract concept, not a technical concept. For how to correctly understand the product of such a complex system as LED display screen, it is still necessary to analyze the product from the perspective of users and guide users to correctly understand the LED display screen. Return to Sohu to see more