Light source comprising a light emitter arranged inside a...

F - Mech Eng,Light,Heat,Weapons – 21 – K

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F21K 99/00 (2010.01)

Patent

CA 2760767

The invention relates to a light source (10, 12) comprising a light emitter (20) arranged inside a translucent outer envelope (30, 32). The light emitter comprising a light emitting device (40) and comprising a translucent inner envelope (50) at least partially surrounding the light emitting device, the translucent inner envelope comprising a diffuser. A diameter (di )of the translucent inner envelope is smaller than a diameter (do) of the translucent outer envelope. The translucent outer envelope is connected to a base (60) not being translucent. The translucent outer envelope further comprises a symmetry axis (S). An imaginary base-plane (P) is defined substantially perpendicular to the symmetry axis (S) and intersects with a connection point (C) being part of the translucent outer envelope. The connection point is a light transmitting part of the translucent outer envelope at an interface between the translucent outer envelope and the base at a furthest distance from a center (M) of the translucent outer envelope. The light emitter is arranged inside the translucent outer envelope at a distance from the imaginary base-plane away from the base. An effect of the light source according to the invention is that the emission profile of the light source according to the invention is increased.

L'invention concerne une source de lumière (10, 12) comprenant un émetteur de lumière (20) disposé à l'intérieur d'une enveloppe extérieure translucide (30, 32). L'émetteur de lumière comprend un dispositif électroluminescent (40) et une enveloppe intérieure translucide (50) entourant au moins partiellement le dispositif électroluminescent, l'enveloppe intérieure translucide comprenant un diffuseur. Un diamètre (di) de l'enveloppe intérieure translucide est inférieur à un diamètre (do) de l'enveloppe extérieure translucide. L'enveloppe extérieure translucide est raccordée à une base (60) qui n'est pas translucide. L'enveloppe extérieure translucide comprend en outre un axe de symétrie (S). Un plan de base imaginaire (P) est défini de façon à être sensiblement perpendiculaire à l'axe de symétrie (S) et croise un point de raccordement (C) faisant partie de l'enveloppe extérieure translucide. Le point de raccordement est une partie de transmission de lumière de l'enveloppe extérieure translucide à une interface entre l'enveloppe extérieure translucide et la base à une distance la plus éloignée d'un centre (M) de l'enveloppe extérieure translucide. L'émetteur de lumière est disposé à l'intérieur de l'enveloppe extérieure translucide à une distance du plan de base imaginaire éloignée de la base. Un effet de la source de lumière selon l'invention est que le profil d'émission de la source de lumière selon l'invention est accru.

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