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, Since 5050 SMD package is the parallel three chips led unit board, it's current is 60MA. Now after understanding the current and voltage can follow the resistance R = U / I to forget, pay attention to Hefei led unit board, 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 Guangzhou led unit board, which is usually equipped resistance methods. Size of the resistor is particularly important in applications Linyi led unit board seem, if you want to extend the service life of LED lamp beads, we must remember this point oh. LED display viewing distance calculation: the viewing distance by calculating the LED display, you can help us identify the most suitable distance from the viewer, and the best viewing angle, led display will be able to play its unique display. Color mixing distance RGB three-color blended into the distance of a single color: a pixel pitch (mm) × 500/1000 the minimum viewing distance can be displayed from the smoothed image: the pixel pitch (mm) × 1000/1000 Chengdu led unit board, Gao Jin photovoltaic ( Certified), led unit board provided by Jinan Optoelectronics Technology Co., Ltd. Gao Jin. Jinan Gao Jin Optoelectronics Technology Co., Ltd. (www.gjlled.cn) is an industry leader in Jinan, Shandong, liquid crystal devices, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Gao Jin photoelectric leadership with the staff warmly welcome all inquiries negotiations to create high gold Photoelectric better future.