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. 06, 2004
Filed:
Nov. 28, 2001
Leo Hatjasalo, Helsinki, FI;
Kari Rinko, Helsinki, FI;
Oy ICS Intelligent Control Systems LTD, Helsinki, FI;
Abstract
The invention relates to a light indicator, comprising an indicator element ( ) illuminable by a light source ( ). The indicator element is manufactured from a substantially transparent material provided with an informative indicator pattern. The indicator element ( ) is designed as a waveguide panel, wherein light beams propagate with total reflection and get outcoupled therefrom with a diffractive outcoupling system ( ), such as a grating structure or the like, which is configured as an indcator pattern, for producing an indicator pattern ( ) activable in the indicator element ( ) by the action of light, such that divergent recesses and/or grooves of various sizes and/or shape 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 difraction efficiency is a function of place.