Patent ID: 8410709

Claim:
A circuit board of a parallel LED light-emitting device, comprising: an electrical insulation board having a body and a connection strip extended from one side of the body, and the body and the connection strip having a top surface and a bottom surface respectively; a first wire pattern formed on the top surface of the body and having a first matrix main loop is formed by a plurality of closed loops; a plurality of first sub-wires formed in and connected to each of the closed loops; a plurality of second sub-wires formed in each of the closed loops and disconnected to the first sub-wires and the corresponding closed loops; and a plurality of first conducting through holes formed through each of the second sub-wires and the body; a second wire pattern formed on the bottom surface of the body and having a second matrix main loop is formed by a plurality of closed loops respectively corresponding to the closed loops of the first matrix main loops; and a plurality of third sub-wires formed in and connected to each of the closed loops of the second matrix main loop, and connected to the first conducting through holes in the corresponding closed loop of the first matrix main loop so as to electronically connect to the second sub-wires in the corresponding closed loop of the first matrix main loop through the first conducting through holes; two first power wires formed on the top surface of the connection strip and adapted to connect with an external DC power, one of the two first power wires is directly connected with the first matrix main loop; and a second power wire formed on the bottom surface of the connection strip, corresponding to a location of the other first power wire on the top surface of the connection strip, electrically connected with the corresponding first power wire through a plurality of second conducting through holes, and directly connected with the second matrix main loop.