Changzhou FUXIN Electronic Technology Co., Ltd. located in Industrial Park of Qinglong Town, Tianning District, Changzhou, Jiangsu Province, is a high tech enterprise specialized in display screen module, LED display , AC / DC, DC / DC series of switching power supply, rainproof power supply, waterproof power supply, cabinet research, development and manufacturing. FUXIN is one of China lumination and China Power Association members.

What are the two common methods to control the LED grey grade ?They are PWM and AM.1)PWM: this method is to regulate the grey grade by controlling the ratio between the LED "power on" time and "power off" time. LED power on and off at high frequency, the room occupation ratio at each time interval has decided the LED brightness, the longer power on time will lead to more LED brightness, the shorter power on time will lead to lower brightness.2)AM:This method is to regulate the grey grade by control the LED current. LED brightness can be regulated by changing the strength of the current , the higher current will lead to a more LED brightness while the lower current will lead to a lower LED brightnessBoth of the above two methods are all working effectively to control to LED grey grade and commonly used for LED display screen, illumination system and other LED applications.