US Patent No. 10,451,792

LIGHTING SYSTEM


Patent No. 10,451,792
Issue Date October 22, 2019
Title Lighting System
Inventorship Jacobus Dingenis Machiel Van Boven, Eindhoven (NL)
Berent Willem Meerbeek, Eindhoven (NL)
Anthonie Hendrik Bergman, Eindhoven (NL)
Assignee SIGNIFY HOLDING B.V., Eindhoven (NL)

Claim of US Patent No. 10,451,792

1. A lighting system comprising:a first controllable light source configured to provide light in a first direction,
a second electrically controllable light source configured to provide light in a second direction,
an optical element, and
an edge lit light guide comprising an out-coupling pattern on its surface and/or scattering particles or structures formed within its structure,
wherein the optical element comprises a grid of hexagonal cells wherein light emitted by the first controllable light source within a threshold angle each side of the normal from the middle of each cell does not pass through a cell wall and thus is not processed, whereas light emitted at an angle greater than the threshold angle each side of the normal passes through a cell wall and is suitably processed, and
wherein the second electrically controllable light source is side coupled to the edge lit light guide,
wherein the edge lit light guide is configured in such a manner that light from the first controllable light source and the optical element are coupled to the edge lit light guide and pass through the edge lit light guide along the depth dimension of the edge lit light guide and a significant portion of the light emitted by the first controllable light source is not scattered or diffused,
wherein the edge lit light guide is configured to diffuse light provided by the second electrically controllable light source such that at least a portion of the light provided by the second electrically controllable light source is output in the first direction and is mixed with the light provided by the first controllable light source;
wherein the second electrically controllable light source comprises an array of selectable light emitting elements arranged on at least part of the periphery of the edge lit light guide; and
wherein the selectable light emitting elements generate at least two selectable collimated light beams and the edge lit light guide comprises at least two respective regions of light diffusing particles, the regions of light diffusing particles shaped in a defined form, wherein the lighting system is configured to generate an illuminated shape in the defined form based on the light provided by the second electrically controllable light source mixed with the light provided by the first electrically controllable light source.