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:
Oct. 14, 2008
Filed:
Jul. 22, 2004
Cornelis Van Berkel, Hove, GB;
Alan G. Knapp, Crawley, GB;
Hugo J. Cornelissen, Waalre, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
An autostereoscopic display device (), includes a display panel (), a lenticular sheet () and an electrically controllable diffuser (). The electrically controllable diffuser () includes an optical medium (), e.g. polyethyleneterephthalate (PET), with a structured surface () against an electro-optic medium (), e.g. a small droplet polymer dispersed liquid crystal (PDLC) layer. The electro-optic material () refractive index is varied with an applied electric field (or zero field) and is switchable between at least (i) a value (n) substantially matching that of the optical medium (), which provides a substantially non-diffusing mode, hence 3D operation of the display device, and (ii) a value (n) different to that of the optical medium () hence causing refraction at the structured surface (), the structured surface () providing different refraction angles (θ) so as to provide an overall diffusing effect, hence 2D operation. The diffuser () may be provided as a stand-alone item.