LIGHT-EMITTING DIODE LAMP Russian patent published in 2019 - IPC F21S8/00 

FIELD: lighting.

SUBSTANCE: invention relates to lighting engineering, in particular to filament light-emitting diode lamps, which replace traditional incandescent lamps, which contain as a source of optical radiation a matrix of in-series connected light-emitting diode light sources in form of lines - light-emitting diode tapes. Light-emitting diode lamp comprises a bulb made from light-transmissive material with a base, as well as rod-shaped holder arranged inside the bulb and oriented towards the longitudinal axis of the LED lamp, and a spiral LED strip, the turns of which are located around the rod holder and are distributed along its height. LED tape comprises a single printed circuit board in the form of a strip including a central pad and two adjacent extended parts with electrically connected semiconductor light sources arranged on each of them and forming long LED elements. Central area of the light-emitting diode tape has a through hole, on the central platform there is a current-conducting path located along the perimeter of the said hole, which is made with provision of electric connection of the LED elements. Upper end section of each light-emitting diode element is secured near upper end section of rod holder. Each light-emitting diode element is mounted so that to form a diverging cone-shaped spiral in the direction from top to bottom, the coils of which are located around the rod holder and are distributed along its height. Turns of one spiral are placed between coils of another, and light-emitting diode elements are oriented so that semiconductor light sources are located on their surfaces facing upwards.

EFFECT: high uniformity of radiation and obtaining a radiation pattern close to circular, both in horizontal and vertical planes.

1 cl, 1 dwg