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US 9,803,823 B2Granted
Vehicle LED bulb with polygonal light guide
AssigneeOsram Sylvania Inc.
InventorsThomas Tessnow, Ronald E. Boyd, Jr., Catherine Cullity
Life of this patent
Estimating the term…
Abstract
An automotive LED lamp having a light guide (28) having a single central bore (29) defined by a cylindrical wall (26) and an outer surface (31) defined by a plurality of outer wall segments (35) bounding, as seen in cross-section transverse the optical axis (18) a regular polygonal shape having more than four sides. The outer polygonal shape has between five sides and sixteen sides, preferably a ten-sided decagon.
Claims27
A vehicle light source, comprising:
- a housing (12) having a base (14);
- a printed circuit board (20) positioned in said base (14) and having a plurality of LEDs (24) operatively fixed thereto;
- a light guide (28) having a light entrance region (32) proximal said plurality of LEDs (24) and a light exit region (33) distal from said light entrance region (32) and a light guide body (30) extending therebetween,
- said light guide body (30) having a generally hollow interior defined by a single, centrally located bore (29) bounded by a cylindrical wall (26) arrayed around a central optical axis (18), said optical axis extending away from said plurality of LEDs (24);
- said light guide body (30) further comprising, on an outer peripheral surface (31) thereof, a plurality of outer wall segments (35) bounding, as seen in cross-section transverse said optical axis (18), a regular polygonal shape having more than four sides, and wherein said light exit region (33) is axially opposite said light entrance region (32).
2 more elements
A vehicle light source, comprising:
- a housing (12) having a base (14);
- a printed circuit board (20) positioned in said base (14) and having a plurality of LEDs (24) operatively fixed thereto;
- a light guide (28) having a light entrance region (32) proximal said plurality of LEDs (24) and a light exit region (33) distal from said light entrance region (32) and a light guide body (30) extending therebetween,
- said light guide body (30) having a generally hollow interior defined by a single, centrally located bore (29) bounded by a cylindrical wall (26) arrayed around a central optical axis (18), said optical axis extending away from said plurality of LEDs (24);
- said light guide body (30) further comprising, on an outer peripheral surface (31) thereof, a plurality of outer wall segments (35) bounding, as seen in cross-section transverse said optical axis (18), a regular polygonal shape having more than four sides,
- wherein the cylindrical wall (26) is continuously smoothly curved extending over an entire axial length of said central bore (29) of said light guide body (30), said central bore (29) extending between said light entrance region (32) and said light exit region (33).
3 more elements
A vehicle light source, comprising:
- a housing (12) having a base (14);
- a printed circuit board (20) positioned in said base (14) and having a plurality of LEDs (24) operatively fixed thereto;
- a light guide (28) having a light entrance region (32) proximal said plurality of LEDs (24) and a light exit region (33) distal from said light entrance region (32) and a light guide body (30) extending therebetween,
- said light guide body (30) having a generally hollow interior defined by a single, centrally located bore (29) bounded by a cylindrical wall (26) arrayed around a central optical axis (18), said optical axis extending away from said plurality of LEDs (24);
- said light guide body (30) further comprising, on an outer peripheral surface (31) thereof, a plurality of outer wall segments (35) bounding, as seen in cross-section transverse said optical axis (18), a regular polygonal shape having more than four sides,
- and wherein, in an energized condition of said plurality of LEDs (24), light exiting said light exit region (33) has, as viewed in a polar angular region declining 0 to 180 degrees relative said optical axis (18), an emission pattern whose normalized intensity does not exceed a regulatory maximum normalized intensity threshold proscribed by ECE Regulation 128.
3 more elements
A vehicle light source, comprising:
- a housing (12) having a base (14);
- a printed circuit board (20) positioned in said base (14) and having a plurality of LEDs (24) operatively fixed thereto;
- a light guide (28) having a light entrance region (32) proximal said plurality of LEDs (24) and a light exit region (33) distal from said light entrance region (32) and a light guide body (30) extending therebetween,
- said light guide body (30) having a generally hollow interior defined by a single, centrally located bore (29) bounded by a cylindrical wall (26) arrayed around a central optical axis (18), said optical axis extending away from said plurality of LEDs (24);
- said light guide body (30) further comprising, on an outer peripheral surface (31) thereof, a plurality of outer wall segments (35) bounding, as seen in cross-section transverse said optical axis (18), a regular polygonal shape having more than four sides, and
- further comprising a plurality of fastening projections (56) extending radially away from said optical axis (18) in spaced angular relation about said optical axis (18), said fastening projections (56) adapted to engage a socket of an automotive reflector.
3 more elements
Dependencies are inferred from the claim text.