Lighting device
AssigneeKoninklijke Philips Electronics N.V.
InventorJohannes Marra
Life of this patent
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Abstract
A lighting device comprising at least one light source arranged in a housing for emitting a lighting beam through a light-transmitting plate of the housing, wherein said plate (1) is provided with means which reflect incident light on the plate (1), in such a manner that light which locally has a higher intensity is reflected more strongly at that location than light which locally has a lower intensity, a special feature being the fact that said means comprise at least one light-transmitting plate, which is locally provided with a patterned reflective material, the reflective material reflecting more than 80% of the incident
Claims17
A lighting device comprising at least one light source arranged in a housing for emitting a lighting beam through a light-transmitting plate of the housing, wherein said plate is provided with means which reflect incident light on the plate, in such a manner that light which locally has a higher intensity is reflected more strongly at that location than light which locally has a lower intensity, characterized in that said means comprise at least one light-transmitting plate, which is locally provided with a patterned reflective material, the provided reflective material reflecting more than 80% of the incident light thereon.
A method for the lateral homogenisation of the intensity of the light emitted from a lighting housing, using a lighting device comprising at least one light source arranged in a housing for emitting a lighting beam through a light-transmitting plate of the housing, wherein said plate is locally provided with means which reflect incident light on the plate, in such a manner that light which locally has a higher intensity is reflected more strongly at that location than light which locally has a lower intensity, characterized in that said means comprise at least one light-transmitting plate, which is locally provided with a reflective material which reflects more than 80% of the incident light thereon, and wherein the patterned material has been rendered visually indistinguishable by disposing an additional translucent plate, for example a matted plate, on the side of the light-transmitting plate facing away from the light source, spaced from said light-transmitting plate by a short distance and oriented in parallel thereto.
Dependencies are inferred from the claim text.