Light panel

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G - Physics

09

F

G09F 13/04 (2006.01) F21V 8/00 (2006.01)

Patent

CA 2373471

The invention relates to a light panel, comprising a light source (1) and a panel element (2). The panel element is manufactured from a substantially transparent material for transmitting light thereby. The panel element (2) is further configured as a waveguide panel, inside which the light beams propagate with total reflection and get outcoupled therefrom with a diffractive outcoupling system. An outcoupling system (2u), such as a grating structure or the like, is adapted to cover the entire panel element (2) as far as its light surface (2a) is concerned, such that divergent recesses and/or grooves of various sizes and/or shapes are used to produce divergent local gratings of various sizes and/or shapes, such as multi- shaped and/or binary pixels and/or units, having the filling factor, shape, profile and/or size thereof optimized in such a way that the diffraction efficiency is a function of place.

L'invention concerne un panneau luminescent comprenant une source (1) lumineuse et un panneau (2). Le panneau est fabriqué à partir d'un matériau sensiblement transparent de manière à transmettre de la lumière. En outre, le panneau (2) se présente sous forme d'un panneau guide d'ondes, à l'intérieur duquel les faisceaux lumineux se propagent par réflexion totale et y sont extraits au moyen d'un système d'extraction à diffraction. Un système d'extraction (2u), tel qu'une structure de réseau ou une structure similaire, est conçu pour couvrir le panneau (2) sur toute sa surface lumineuse (2a), de sorte que des enfoncements divergents et/ou des rainures de taille et/ou de forme variable(s) sont utilisés pour produire des réseaux locaux divergents de taille et/ou de forme variables, tels que des pixels et/ou des unités multi-formes et/ou binaires, présentant le facteur de remplissage, la forme, le profil et/ou la taille optimisés de sorte que le rendement de diffraction soit une question de place.

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