Loading patent…
AssigneeKoninklijke Philips Electronics N.V.
InventorsWillem Lubertus Ijzerman, Michel Cornelis Josephus Marie Vissenberg
Estimating the term…
A backlight arrangement (100) comprising at least a light source (101) and a waveguide plate (102) comprising a front surface (104) and an opposing back surface (103) and at least one surface (107) for receiving light from said light source (101), said surface for receiving light connecting said front and back surfaces is provided. At least one of said front surface (104) and said back surface (103) is a facetted surface comprising a plurality of planar parallel portions (105) and a plurality of facets (106) connecting said planar parallel portions. The facets (106) are formed such that the thickness of said waveguide plate (102) decreases stepwise with the distance from said surface (107) for receiving light, and such that at least part of the light received into the waveguide plate (102) via said surface (107) for receiving light is extracted from said waveguide plate (102) through said facets (106).
A backlight arrangement (100) comprising at least a light source (101) and a waveguide plate (102) comprising a front surface (104) and an opposing back surface (103) and at least one surface (107) for receiving light from said light source (101), said at least one surface (107) connecting said front and back surfaces, wherein at least one of said front surface (104) and back surface (103) is a facetted surface comprising a plurality of planar parallel portions (105) and a plurality of facets (106) connecting said planar parallel portions (105), the plurality of facets (106) being formed such that the thickness of said waveguide plate (102) decreases stepwise with the distance from said surface for receiving light (107), and such that at least part of the light received into the waveguide plate (102) via said surface (107) for receiving light is extracted from said waveguide plate (102) through said plurality of facets (106).
A display device comprising a backlight arrangement that includes at least a light source and a waveguide plate including a front surface and an opposing back surface and at least one surface for receiving light from said light source, said at least one surface (107) connecting said front and back surfaces, wherein at least one of said front surface and back surface is a facetted surface comprising a plurality of planar parallel portions and a, plurality of facets connecting said planar parallel portions, the plurality of facets being formed such that the thickness of said waveguide plate decreases stepwise with the distance from said surface for receiving light and such that at least part of the light received into the waveguide plate via said surface for receiving light is extracted from said waveguide plate through said plurality of facets.
Dependencies are inferred from the claim text.