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:
May. 11, 2010
Filed:
Aug. 17, 2004
Alwin Rogier Martijn Verschueren, Eindhoven, NL;
Kristiaan Neyts, Ghent, BE;
Goran Stojmenovik, Ghent, BE;
Alwin Rogier Martijn Verschueren, Eindhoven, NL;
Kristiaan Neyts, Ghent, BE;
Goran Stojmenovik, Ghent, BE;
Chi Mei Optoelectronics Corporation, Tainan County, TW;
Abstract
The present invention relates to the removal of ion () contaminations from liquid crystal layers () in liquid crystal display devices (). The ions () are removed by means of so called ion pumping, which utilizes the anisotropic viscosity of liquid crystals. The ions () are pumped up and down in the liquid crystal layer by means of an alternating electric filed. The alternating electric field simultaneously alters the alignment of directors () in the liquid crystal. The viscosity in the liquid crystal is related to the director directions, and the ions () are thereby moved in non-closed trajectories (). The inventive ion pumping can be further improved using an asymmetric or biased alternating electric field.