In this work ,a novel COB (chip on board) module based on high voltage ,linear constant current technology was designed .The electronic components ,such as HV-LED chips ,high voltage ,linear con-stant current IC ,and rectifier bridge etc ,were encapsulated on ceramic substrate without any electrolytic capacitor .The influence of die attach adhesive on luminous flux of COB module by experiment was investi-gated .The results show that the COB module based on high-voltage ,linear constant current technology with the advantages of small volume ,ease to use and so on ,is the trend of the indoor lighting light source in the future .