LED lighting system
AssigneeArtemide S.p.A.
InventorsCarlotta Francesca Isolina Maria De Bevilacqua, Roberto Franzosi, Laura Pessoni
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Abstract
An LED lighting system comprises a support base, a printed circuit board provided with a plurality of LEDs, and a plurality of optical elements aligned with respective LEDs along respective axes is disclosed. Each optical element extends along and around the respective axis and comprises a central lens arranged along the axis and made of a transparent material, and a lateral hollow structure, substantially cup-shaped and positioned around the axis and the lens. The structure is also made of a transparent material and has a prismatic outer lateral surface provided with a series of longitudinal prismatic ridges arranged side by side and separated by grooves.
Claims13
An LED lighting system, comprising:
- a support base,
- a printed circuit board provided with a plurality of LEDs, and
- a plurality of optical elements aligned with respective LEDs along respective axes, wherein each optical element extends along and around the respective axis and comprises:
- a central lens arranged along the axis and made of a transparent material, and
- a lateral hollow structure substantially cup-shaped and positioned around the axis and the lens, wherein the structure is made of a transparent material and has a prismatic outer lateral surface provided with a series of longitudinal prismatic ridges arranged side by side and separated by grooves;
- wherein the lens is configured to intercept the light emitted by the respective LED and direct a main fraction of the light emitted by the LED, greater than at least 80%, particularly between 85% and 90%, into a light beam having a predetermined angle of emission;
- and
- wherein the structure is configured to intercept a fraction of the light exiting the lens outside said light beam and to retroreflect by catadioptric effect said fraction and direct said fraction into said light beam having said predetermined angle of emission;
- and
- wherein the lens extends along the axis between a concave inlet surface, facing the respective LED, and a convex outlet surface, and the inlet surface is surrounded by a collar that projects from the inlet surface toward the printed circuit board and surrounds the LED.
An LED lighting system, comprising:
- a support base,
- a printed circuit board provided with a plurality of LEDs, and
- a plurality of optical elements aligned with respective LEDs along respective axes, wherein each optical element extends along and around the respective axis and comprises:
- a central lens arranged along the axis and made of a transparent material, and
- a lateral hollow structure substantially cup-shaped and positioned around the axis and the lens, wherein the structure is made of a transparent material and has a prismatic outer lateral surface provided with a series of longitudinal prismatic ridges arranged side by side and separated by grooves, wherein the structure has a substantially square or trapezoidal shape in cross-section;
- wherein the lens is configured to intercept the light emitted by the respective LED and direct a main fraction of the light emitted by the LED, greater than at least 80%, particularly between 85% and 90%, into a light beam having a predetermined angle of emission;
- wherein the structure is configured to intercept a fraction of the light exiting the lens outside said light beam and to retroreflect by catadioptric effect said fraction and direct said fraction into said light beam having said predetermined angle of emission.
Dependencies are inferred from the claim text.