LED display gray level knowledge is introduced

by:GKGD     2020-04-23
LED display gray level knowledge is introduced: a, gray gradations of color is gray or gray, is refers to the brightness of light and shade degree. For digital display technology, gray level is to display the number of color. In general gray level is higher, shows the more colorful, the picture is more exquisite, more abundant details. Grey scale mainly depends on the A/D conversion system. Of course system of video processing chip, storage and transmission system to provide all the support of the digits. At present domestic LEDLEDLED display mainly adopts eight processing system, which is 256 ( 28) Grey level. Simple understanding is a total of 256 from black to white brightness changes. Use RGB trichromatic can constitute a 256 x 256 x 256 = 16777216 colors. Known as the 16 million colors. International brand LEDLED display mainly adopts 10 processing system, namely a level 1024 grayscale, RGB trichromatic may constitute a 10. 700 million colors. Gray though is to determine the number of color decision factors, but is not to say that restrict the bigger the better. Because first of all, the resolution of the human eye is limited, moreover the improvement of system processing digits involving system video processing, storage, transmission, scanning the change of each link, such as costs, price declines. In general civil or commercial grade products can be used in a 8-bit systems, broadcast products can use 10 systems. Second, nonlinear transform gray, gray nonlinear transformation refers to the gray level data according to the empirical data or some kind of arithmetic of nonlinear relationship between transformation and then provided to the full color LED display. Because leds are linear devices, nonlinear features different with the traditional . In order to be able to let the display effect of full color LED display can conform to the traditional data sources without loss of gray level, general level after the LED display system can do gray level data of the non linear transformation, the transformation of data bits can increase ( Guarantee without losing data value) 。 Now some domestic control system supplier so-called gray level 4096 or 16384 grey level or higher are gray space size after a nonlinear transform. 4096 level is adopted eight source to 12 nonlinear transformation technology of the space, class of 16384 is using nonlinear transformation technology of 8 bit to 16 bit. By the eight source for nonlinear transformation, the transformed space certainly bigger than eight source. Generally at least 10. Like gray, this parameter is not the bigger the better, usually 12 can do enough transformation. ( full color LED display]
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