Edge-lighted luminous device
OwnerFrédéric Chazallet, Christophe E. Blancinventors
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Abstract
The technical field of the invention is that of manufacturing luminous display devices. The invention provides an edge-lighted luminous device comprising a thin plate of translucent or transparent plastics material, a light source lighting the edge of the plate, and on at least one of the main faces of the device, a grating of linear diffusing motifs of spacing that varies regularly.
Claims16
A light guide for a lighting device, said light guide comprising a transparent plate of glass or plastics material and having two opposite main faces and an edge, at least one of said main faces having a grating of linear diffusing motifs, said linear diffusing motifs being spaced from one another at a spacing which varies regularly along an axis in geometric progression having a ratio lying in the range 0.99 to 1.01 and not equal to 1.
A luminous panel including:
- a light guide, said light guide comprising a transparent plate of glass or plastics material and having two opposite main faces and an edge, at least one of said main faces having a grating of linear diffusing motifs, said linear diffusing motifs being spaced from one another at a spacing which varies regularly along an axis in geometric progression having a ratio lying in the range 0.99 to 1.01 but not equal to 1, and wherein said motifs are formed by means of a laser beam, said motifs being in the form of rectilinear grooves that are parallel to one another and are parallel to said edge, said motifs having a width lying in the range of 1 μm to 100μm, and in which a minimum distance between two grooves lies in the range of 2 μm to 200 μm, and in which a maximum distance between two grooves is less than 10 mm,
- a light source;
- and
- a bundle of plastic optical fibers transporting light emitted by said source to said edge of said plate.
Dependencies are inferred from the claim text.