Lighting device
AssigneeLumileds LLC
InventorsMichael Deckers, Benno Spinger
Life of this patent
Estimating the term…
Abstract
A lighting device is provided comprising at least one light-emitting element comprising a light-emitting surface configured to emit light; and a light-guiding sheet at least partially covering the light-emitting surface and comprising at least one cavity forming a passage for light emitted from the light-emitting surface. Thereby, at least one lateral surface limiting the at least one cavity is configured to reflect light emitted from the light-emitting surface. Further, a size of an opening of the at least one cavity facing the light-emitting surface is smaller than an area of the light-emitting surface.
Claims17
A lighting device comprising:
- at least one light-emitting element comprising a light-emitting surface configured to emit light;
- a light-guiding sheet on and at least partially covering the light-emitting surface and comprising at least one cavity forming a passage for light emitted from the light-emitting surface, the at least one cavity comprising at least one lateral surface configured to reflect light emitted from the light-emitting surface, and
- a size of an opening of the at least one cavity facing the light-emitting surface being smaller than an area of the light-emitting surface;
- and
- at least one light-reflecting surface that is one of:
- arranged between the light-emitting surface of the at least one light-emitting element and the light-guiding sheet, corresponds to a portion of a top surface of the at least one light-emitting element, or corresponds to a portion of the light-guiding sheet facing the light-emitting surface of the at least one light-emitting element, the at least one light-reflecting surface being configured to reflect light emitted from the at least one light-emitting element in a direction towards the at least one light-emitting element.
A method for producing a lighting device, the method comprising:
- providing at least one light-emitting element comprising a light-emitting surface configured to emit light;
- providing a light-guiding sheet to be arranged on and at least partially cover the light-emitting surface;
- forming at least one cavity in the light-guiding sheet to provide a passage for light emitted from the light-emitting surface, the at least one cavity being formed to have a size of an opening facing the light-emitting surface smaller than an area of the light-emitting surface and to have at least one lateral surface configured to reflect light emitted from the light-emitting surface in a direction towards the at least one light-emitting element;
- and
- forming at least one light-reflecting surface to one of:
- be arranged in between the light-emitting surface of the at least one light-emitting element and the light-guiding sheet, correspond to a portion of a top surface of the at least one light-emitting element, or correspond to a portion of the light-guiding sheet facing the light-emitting surface of the at least one light-emitting element.
Dependencies are inferred from the claim text.