A printed circuit includes a number of conductive wires. Each of the conductive wires includes a first conductive wire section, a second conductive wire section, and a first connection section. The first connection section includes a first end and a second end opposite to the first end, the first end of the first connection section is connected to the first conductive wire section, and the second end of the first connection section is connected to the second conductive wire section. An angle between the first conductive wire section and the first connection section can be in a range from about 90 degrees to about 180 degrees.