74HC595 internal circuit control signals for all four groups of RCK 74HC595, SCK, EN all together. 74HC595 control signal and the input and line scan four groups serial shift register control signals A, B, C, D constitute the input of the LED unit board; after 74HC595 control signal by the driver and four sets of serial shift register After the drive output and line scan control signal A, B, C, D constitute the entire LED unit board accessory output led group for input cascade a LED unit board. LED display viewing distance calculation methods: by calculating the distance led LED display watch parts factory, we can easily identify the most appropriate distance from the viewer, and the best viewing angle, led display will be able to play its unique display . Color mixing distance RGB color mixing become a distance of a single color: the pixel pitch (mm) × 500/1000 minimum viewing distance can display distance smoothed image: the pixel pitch (mm) × 1000/1000 led accessories group | High Jinliang photovoltaic (already Certification) | led accessories provided by the Jinan High Jinliang Optoelectronics Technology Co., Ltd .. Jinan High Jinliang Optoelectronics Technology Co., Ltd. (www.zhkyled.com) is an industry leader in Jinan, Shandong, liquid crystal device, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In high Jinliang photoelectric leadership with the staff warmly welcome all inquiries negotiations to create high Jinliang photoelectric a better future.