What is the concept of gray scale in LED full color screen?

"What is the concept of gray scale in LED full-color screen?" A friend asked me that people in the industry often mentioned the gray scale of LED full-color screens. So what is the concept of gray scale? Simply understand that gray scale is every level from dark to bright. Just like going up the stairs, each step is each gray scale of the gray scale. The more gray scales, the more detailed the division, just like nanotechnology is often mentioned, the smaller the density, the higher the quality at the same time. For display technology that uses digitization, grayscale is the determining factor for the number of displayed colors. Generally speaking, the higher the grayscale, the richer the displayed colors, the more delicate the picture, and the easier it is to express rich details. Principle of Gray Scale Imaging The gray scale mainly depends on the number of digital-to-analog conversion bits of the system. Of course, the system's video processing chip, memory and transmission system must provide the corresponding number of support. At present, the LED full-color screen mainly adopts: 8-bit processing system, that is, 256 (2 to the 8th power) grayscale. A simple understanding is that there are 256 brightness changes from black to white. 10-bit processing system, that is, 1024 (2 to the 10th power) grayscale. A simple understanding is that there are 1024 brightness changes from black to white. 12-bit processing system, that is, 4096 (2 to the 12th power) grayscale. A simple understanding is that there are 4096 brightness changes from black to white. 14-bit processing system, that is, 16384 (2 to the 14th power) gray scale. A simple understanding is that there are 16384 brightness changes from black to white. How to identify the brightness level of the LED full-color screen The brightness identification level refers to the brightness level of the image that the human eye can distinguish from the darkest to the whitest. As mentioned earlier, the gray scale of the display screen is very high, which can reach 256 or even 1024 levels. However, due to the limited sensitivity of the human eye to brightness, these gray levels cannot be fully recognized. That is to say, many adjacent levels of grayscale may look the same to human eyes. And the ability of eyes to distinguish varies from person to person. For the display screen, the higher the level of human eye recognition, the better, because the images displayed on the LED screen are for people to see after all. The more brightness levels the human eye can distinguish, the larger the color space of the LED display, and the greater the potential for displaying rich colors. The brightness identification level can be tested with special software. Generally, the display screen can reach level 20 or above, which is considered a relatively good level. The so-called 4096-level grayscale or 16384-level grayscale or higher by some domestic control system suppliers refers to the size of the grayscale space after nonlinear transformation. Level 4096 adopts the non-linear transformation technology from 8-bit source to 12-bit space, and level 16384 adopts the non-linear transformation technology from 8-bit to 16-bit. The non-linear transformation is done by the 8-bit source, and the converted space must be larger than that of the 8-bit source. Generally at least 10 digits. Like the gray scale, the larger the parameter, the better. Generally, 12 bits can do enough transformation. Red, green, and blue contribute differently to the fineness of white. The fundamental reason is that the retina of the human eye perceives different wavelengths of light differently. After a large number of experimental tests, the following approximate ratios are obtained for reference design. The simple red, green and blue brightness ratio is: 3:6:1, and the precise red, green and blue brightness ratio is: 3.0:5.9:1.1 In summary, it is not difficult to see that, The grayscale and brightness of the LED full-color display are related to each other and have their own differences. Neither the grayscale nor the brightness is as good as the value. .