Two-color LED unit board hardware components and working principle of common indoor color LED unit board circuit, which line scan circuit by two 74HCl38 (3-8 decoder) constitute 4-16 decoder plus more than 4953 (MOS tube ) consisting of groups led accessories, scanning for 1/16. Down by half screen were two groups with 74HC595 serial shift registers for red, green, input data display column led shell accessories, in 64 × 32 standard LED unit board, each serial shift register has eight 74HC595 level Alliance, four groups shared a 32 74HC595. LED unit board more accurate calculation method: length × height using a cell plate number plate = total number of units using the number of LED unit board such as: 5 meters long and 2 meters high P16 color led display uses several modules: LED display Long screen using cell plate number = 5 m ÷ 0.256 米 = 19.53125≈20 use a high number of units of LED display board = 2 m ÷ 0.128 米 = 15.625≈16 a LED display uses the total number of LED unit board = 20 × 16 a = 320 led Parts City, led accessories, high Jinliang photoelectric provided by Jinan High Jinliang Optoelectronics Technology Co., Ltd .. Jinan High Jinliang Optoelectronics Technology Co., Ltd. (www.zhkyled.com) strong, credible, in Jinan, Shandong liquid crystal device industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the high Jinliang photoelectric and you hand into the brilliant, for a better future!