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:
Sep. 02, 2008
Filed:
Apr. 14, 2004
Janez Pirs, Ljubljana, SI;
Matej Bazec, Koper, SI;
Silvija Pirs, Ljubljana, SI;
Bojan Marin, Ljubljana, SI;
Andrej Vrecko, Ponikva, SI;
Janez Pirs, Ljubljana, SI;
Matej Bazec, Koper, SI;
Silvija Pirs, Ljubljana, SI;
Bojan Marin, Ljubljana, SI;
Andrej Vrecko, Ponikva, SI;
Institut Jozef Stefan, , SI;
Abstract
A new concept of the normally open LCD light switching element is proposed, which allows for the superior angular compensation for the light attenuation by using a single simple negative bireffingent c-plate compensation layer. The concept is based on the simultaneous use of highly angularly symmetric STN LC-configuration (preferably 180° twist) and maximal use of the single (preferably ordinary ray) light propagation mode. The solution is best suitable for various light switching applications like LCD automatic protective welding light filters, as well as for multi-segment large display panels, where it provides for excellent uniformity of the light-attenuation in the 'dark' state.