Patent ID: 7965038

Claim:
A compact fluorescent lamp comprising a fluorescent lamp body, a a screened space around an electrode arranged inside the compact fluorescent lamp, and a power supply device arranged to provide an electrical connection between the electrode and a contact device positioned next to the contact end of the compact fluorescent lamp, the screened space being formed by an internal wall of the fluorescent lamp body enclosing the electrode and by the electrode and beyond the electrode, in a direction away from the contact end, a disc-shaped cathode screen, containing a central opening wherein the side of the disc-shaped cathode screen facing away from the electrode exhibits a rounded area, and wherein the side of the disc-shaped cathode screen facing towards the electrode exhibits a concave surface, wherein that the disc-shaped cathode screen includes an extent essentially corresponding to the internal cross-sectional area of the fluorescent lamp body, viewed in a plane perpendicular to the essential longitudinal direction of the fluorescent lamp body but without coming into contact with the fluorescent lamp.