Luminaire and method of lighting by means of a luminaire
AssigneeKoninklijke Philips Electronics N.V.
InventorsHendrik Wijbenga, Jean Paul Entrop
Life of this patent
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Abstract
The luminaire has a reflector (10) having a light emission window (15), near to first opposed edges (16) of which respective sets of strips (25) are present to create a cut-off angle β. The reflector (10) is closed by a hood (30) which, along first walls (31) thereof close to the first edges (16), have refracting elements (35) to cause the luminaire to emit light at small angles to the light emission window (15), within the cut-off angle β. The luminaire is suitable to be used for under canopy lighting of a petrol station and to signal to the distance that the station is open, without dazzling oncoming drivers. The method involves the use of the luminaire mounted to the ceiling of the canopy.
Claims9
A luminaire suitable for under canopy lighting, comprising:
- a concave reflector (10) with a plane of symmetry (11) and defining a cavity (12);
- a light emission window (15) tangent to the reflector (10), transverse to the plane of symmetry (11), and having first edges (16) along the plane of symmetry (11);
- holding means (20) for accommodating an electric lamp L in the cavity (12) of the reflector (10), with an elongate light source Ls of said lamp L transverse to the plane of symmetry (11);
- a set of strips (25) adjacent the first edges (16), extending substantially from the light emission window (15) into the cavity (12), said strips being light-diffusing, wherein the strips create a cut-off angle β with respect to the light emission window (15) within which no light is emitted directly from the lamp;
- a light-transmitting hood (30) covering the light emission window (15), said hood (30) having first walls (31) extending substantially away from the first edges (16);
- and
- a light-refracting element (35) disposed within a region of the cut-off angle β and along at least one of the first walls (31) of the light-transmitting hood (30), the element (35) having a base (36) facing the light emission window (15) and a top (37) remote from the light emission window (15), wherein the light-refracting element is configured to cause light emitted from said lamp L that is diffusely reflected from one of the strips at an opposite side of the plane of symmetry to emanate within an angle of up to 5° to the light emission window (15).
A method of lighting an area under a canopy of a petrol station by operating an electric lamp in a luminaire which is mounted to a ceiling of the canopy and which comprises:
- a concave reflector (10) with a plane of symmetry (11) and defining a cavity (12);
- a light emission window (15) tangent to the reflector (10), transverse to the plane of symmetry (11), and having first edges (16) along the plane of symmetry (11);
- holding means (20) for accommodating an electric lamp L in the cavity (12) of the reflector (10), with an elongate light source Ls of said lamp L transverse to the plane of symmetry (11);
- a set of strips (25) adjacent the first edges (16), extending substantially from the light emission window (15) into the cavity (12), said strips being light-diffusing, wherein the strips create a cut-off angle β with respect to the light emission window (15) within which no light is emitted directly from the lamp;
- a light-transmitting hood (30) covering the light emission window (15), said hood (30) having first walls (31) extending away substantially from the first edges (16);
- and
- a light-refracting element (35) disposed within a region of the cut-off angle β and along at least one of the first walls (31) of the light-transmitting hood (30), the element (35) having a base (36) facing the light emission window (15) and a top (37) remote from the light emission window (15), wherein the light-refracting element is configured to cause light emitted from said lamp L that is diffusely reflected from one of the strips at an opposite side of the plane of symmetry to emanate within an angle of up to 5° to the light emission window (15), the sets of strips being transverse to a direction of traffic.
Dependencies are inferred from the claim text.