Patent ID: 8410708

Claim:
An LED decoration lamp comprising: a lamp string including a plurality of lamp groups which are connected in series, said lamp string having a first end and a second end, each of said lamp groups having a first LED light and a second LED light, anode of said first LED light being connected to cathode of said second LED light, cathode of said second LED light being connected to anode of said first LED light, said first LED light and said second LED light of each of said lamp groups being different in color; a conductive wire having a first end and a second end, said first end of said conductive wire being connected with said first end of said lamp string; and a controller having two output ends and two input ends, said output ends being connected with said second end of said conductive wire and said second end of said lamp string, said input ends being connected with a power supply; wherein said controller controls current direction in said lamp string so that when current flows in a first direction, said first LED light is positively conducted and said second LED light is non-conducted thus causing said first LED light to emit light, but when current flows in a second direction, said second LED light is positively conducted and said first LED light is non-conducted thus causing said second LED light to emit light, and thereby said controller can control only said first LED light or only said second LED light of said lamp groups of said lamp string to emit light as desired, and therefore said controller can control said first or second LED light to emit a single color, or control said first and second LED light to emit light alternately, causing the lamp string to emit light of two colors; and wherein said first LED light and said second LED light are combined together to form a bulb fitted in a lamp body, each of said first LED light and second LED light being provided with a single lighting crystalline grain and two connecting pins, said lamp body having a soft head and a soft core, said soft head being provided with two conducting pins extending downwardly out of said soft head and a recess in which is fitted said soft core, an upper end of each of said conducting pins being connected with an electrode, said soft core having a body formed with a cavity, said bulb being fitted into said cavity of said soft core with said connecting pins extending downwardly through said cavity and then bent against two sides of said soft core, said soft core being then inserted into said recess of said soft head with said connecting pins of said bulb contacting said electrodes of said soft head.