PWM LED driving current regulation mode PWM adjustment method is the use of a particular duty cycle of the pulse driving waveform in a cycle to drive the LED manner. Shenzhen Optoelectronic Technology Co. cloud, the average duty cycle of the LED drive current is determined by the pulse waveform and LED rated drive current at a fixed nominal LED drive current. By varying the duty cycle led module light shell, you can change the average LED drive current, thereby changing the LED output intensity. In order to avoid flickering effect. Pulse waveform frequency is usually greater than 200Hz. 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 color led module, scanning for 1/16. Down by half screen were two groups with 74HC595 serial shift registers for the red, green display data input columns Zhanjiang led module, in 64 × 32 standard LED unit board, each serial shift register has eight 74HC595 cascading, four groups shared a 32 74HC595. Wholesale led module | led module | 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!