In practical design, SoB design uses smaller driver IC solutions take the word screen, you can make the whole LED light particle distribution more flexible, because the driver IC will not be bulky gear to LED arrangement design, but also It can be avoided because the driver IC Barrier practical benefit SoB light type arrangement, in addition to the driver IC volume should be noted, the fact that the size of passive components is focus. Although the use of double-sided PCB material may be concentrated on one side of the light-emitting component material, the drive IC / passive components focused on the other side of the material, but in fact for automated production more simple, quickly led take the word screen, reduce costs more practice will be used on one side of the material, make the process easier, so LED light-emitting component layout on the need to avoid driving IC / passive components, or use a small piece of material designed fabric. LED unit board does not shine 1, check 595 is normal. 2, check the upper and lower module corresponding through foot is turned on. 3, check whether the module output pin 595 feet through. LED unit board lack of color 1, 245 RG check whether there is output data. 2, check the normal and abnormal output pin 595 595 through the input pin if there take the word screen manufacturers _ Gao Jin photovoltaic (certified) _ take the word screen 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.