Patent ID: 6864635

Claim:
A ballast socket for a compact fluorescent lamp, the ballast socket comprising: a case having an upper case, which has a receiving space for receiving a lamp and a connection terminal connected with the lamp at one side of the receiving space, and a lower case. which has a through hole at a lower center of the upper case; a controller mounted inside the case for controlling lighting of the lamp, said controller including, a photocell circuit part supplying AC electric to a double boosting DC conversion device part if it is dark around the photocell circuit part, the photocell circuit part interrupting the electric power if it is light around the photocell circuit part; the double boosting DC conversion device part receiving the electric power under control of the photocell circuit part, the double boosting DC conversion device part converting the received AC power into DC power and supplying CF lamp driving power to a CF lamp driving circuit part; and the CF lamp driving circuit part for receiving the CF lamp driving power output from the double boosting DC conversion device part to light up a CF lamp; a printed circuit board on which the controller is mounted; and pins for connecting the printed circuit board and the connection terminal.