Light indicator

G - Physics – 09 – F

Patent

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Details

G09F 13/04 (2006.01)

Patent

CA 2373446

The invention relates to a light indicator, comprising an indicator element (2) illuminable by a light source (1). The indicator element is manufactured from a substantially transparent material provided with an informative indicator pattern. The indicator element (2) is designed as a waveguide panel, wherein light beams propagate with total reflection and get outcoupled therefrom with a diffractive outcoupling system (2u), such as a grating structure or the like, which is configured as an indicator pattern, for producing an indicator pattern (2a) activable in the indicator element (2) by the action of light, such that divergent recesses and/or grooves of various sizes and/or shapes constitute divergent local gratings of various sizes and/or shapes, such as multi-shaped and/or binary pixels and/or units, the filling factor, shape, profile and/or size thereof being optimized in such a way that the diffraction efficiency is a function of place.

Indicateur lumineux qui comporte un élément indicateur (2) pouvant être éclairé par une source lumineuse (1). Ledit élément est fabriqué à partir d'une matière essentiellement transparente dotée d'un motif indicateur exprimant une information. L'élément indicateur (2) est conçu en tant que panneau guide d'ondes dans lequel des faisceaux de lumière se propagent avec une réflexion totale et sont découplés dudit panneau à l'aide d'un système de découplage (2u) diffracteur, tel qu'une structure en grille ou analogue. Ladite structure est configurée en tant que motif indicateur pour produire un motif indicateur (2a) pouvant être activé dans l'élément indicateur (2) par l'action de la lumière, de manière que des évidements divergents et/ou des rainures de diverses tailles et/ou formes constituent des grilles locales divergentes de diverses tailles et/ou formes telles que des pixels et/ou unités à formes multiples et/ou binaires. Le facteur de compacité, la forme, le profil et/ou la taille desdites unités sont optimisés de manière telle que l'efficacité de diffraction est fonction de la place.

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