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1. IN9849/CHENP/2011 - LIGHT GUIDE PLATE HAVING EMBEDDED IMPURITIES AND METHOD FOR THE PRODUCTION THEREOF

Office India
Application Number 9849/CHENP/2011
Application Date 27.12.2011
Publication Number 9849/CHENP/2011
Publication Date 31.05.2013
Publication Kind A
IPC
G02B 6/00
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
Applicants Evonik Röhm GmbH
Inventors SCHMIDT  Jann
ROTH  Christian
Title
(EN) LIGHT GUIDE PLATE HAVING EMBEDDED IMPURITIES AND METHOD FOR THE PRODUCTION THEREOF
Abstract
(EN)
The invention relates to light guide plates  which are suitable for backlighting LCD monitors as well as informati¬on and advertising signs and which are illuminated at the edges and re-emit the light fed at the edges via at least one of the two surfaces located perpendicular to the edges. For the light of a light source that is fed at the edges to be able to leave the light guide plate again via one of the surfaces by overcoming total reflection  the light rays in the light guide plate have to be deliberately de¬flected. At one of the two surfaces of the light guide plate  the light guide plates are provided with optical impurities (2)  which are protected against damage by a film (5). Furthermore  a method for the simplified application of said impurities is provided.