LED display wall grayscale and brightness level
This article will introduce you in detail to the LED display brightness and grayscale knowledge.
LED display grayscale is also called the color scale or grayscale, refers to the degree of brightness and darkness. For digital led display technology, grayscale is the determining factor of the number of colors displayed. In general, the higher the grayscale, the richer the color of the display, the more delicate the image, the easier it is to display rich details.
LED display grayscale level mainly depends on the number of A / D conversion bits of the system. Of course, the video processing chip, memory and transmission system of the system must provide the corresponding number of bits only. Currently, the domestic LED display mainly uses 8-bit processing system, that is, 256 (28) Grayscale. The simple understanding is that there are 256 brightness changes from black to white. The use of RGB triple color can constitute 256 × 256 × 256 = 16777216 colors. That is, usually called 16 megacolors. International brand displays mainly use 10-bit processing system, that is, 1024 grayscale, RGB triple color can constitute 1.07 billion colors.
Although grayscale is a determining factor in determining the number of colors, it does not mean that there is no limit. First, the resolution of the human eye is limited, then the increase in the number of bits processed by the system will involve changes in the various aspects of the system video processing, storage, transmission, scanning, etc., the cost increases dramatically, and the cost-effectiveness ratio decreases.
Brightness recognition grade
The brightness recognition level refers to the brightness level between the darkest and whitest image that the human eye can distinguish. The grayscale level of the display mentioned above is very high, reaching 256 or even 1024 levels. However, due to the limited sensitivity of the human eye to brightness, it is not possible to fully recognize these grayscale levels. That is, many adjacent grayscale levels may look the same. And the eye’s resolution is different for each person. The more brightness levels the eye can distinguish, meaning that the larger the color space of the display, the greater the potential to display rich colors. The brightness recognition level can be tested with dedicated software, the general display can reach 20 levels or more even if it is a relatively good grade.
I believe that through the above explanation, everyone will have a deeper understanding of the grayscale and brightness of the LED display.
