The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 2009
Filed:
Jun. 17, 2003
Leo Hatjasalo, Helsinki, FI;
Kari Rinko, Helsinki, FI;
Leo Hatjasalo, Helsinki, FI;
Kari Rinko, Helsinki, FI;
Oy Modilis Ltd, Helsinki, FI;
Abstract
The invention relates to a light panel, comprising a light source () and a panel element (). The panel element is manufactured from a substantially transparent material for transmitting light thereby. The panel element () 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 (), such as a grating structure or the like, is adapted to cover the entire panel element () as far as its light surface () 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 filing factor, shape, profile and/or size thereof optimized in such a way that the diffraction efficiency is a function of place.