A full-color LED unit plate driver driving mode for traditional sources of Li Qing, mostly in the form of a constant voltage of existence, which makes the driving very simple traditional light sources. In the linear range, LED luminous intensity and its forward voltage drop proportional to the drive current, and varies with temperature, which requires a constant current to drive the LED. In addition. Cloud optical, white LED module has a significant indicator is the color temperature. In absolute temperature K color temperature expressed in Beijing led module, a light source and bold colors are the same, then put the absolute temperature blackbody is called the color temperature of the light source. White LED color temperature of white light emitted depends on the proportions of the three kinds of color components. In order to adjust the indoor full color LED unit board color temperature of the light source, it is necessary for white LED modules in the blue, green and red 3 LED chip drive current controlled individually, we need three separate constant current drive circuit. Currently, the constant current drive circuit is generally used switch-mode PWM controller to achieve its drive current regulation is divided into analog adjustment mode and PWM adjustment method. Followed by the current, generally piranhas SMD LED lamp beads and bead current common is 20MA, but also a little better chip lamp beads can be done 25 to 30MA, the brightness will be better, but to a certain program will affect the light fades, Because it is three chip 5050 SMD package Jinan led modules in parallel, it's current is 60MA. Now after understanding the current and voltage can follow the resistance R = U / I to forget, pay attention to the voltage here is the voltage difference, the general power supply is 12V. Ie, the resistance R = external supply voltage - voltage lamp beads / lamp beads is the current size of the resistor to be allocated. As 12V-3V / 0.02 * 3A = 150 Euro led module housing, which is usually equipped method of resistance. Size of the resistor is particularly important in the application, if you want to extend the service life of LED lamp beads, we must remember this point oh. Changchun led module _led _ Gao Jin photovoltaic modules provided by Jinan Optoelectronics Technology Co., Ltd. Gao Jin. Jinan Gao Jin Optoelectronics Technology Co., Ltd. (www.gjlled.cn) 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 Gao Jin photoelectric and you hand into the brilliant, for a better future!