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. 21, 2008
Filed:
Aug. 02, 2005
Kazushige Umetsu, Nagano, JP;
Kazushige Umetsu, Nagano, JP;
Seiko Epson Corporation, , JP;
Abstract
An object of the present invention is to provide a method for repairing light point defects in which light points can be converted to black spots through a simple process without affecting surrounding pixels, and the repaired pixels can be maintained without their returning to light points even with the passage of time. The present invention provides a method for repairing light point defect pixels of a liquid crystal display device having a liquid crystal panel which comprises a pair of substrates, a liquid crystal layer interposed between the pair of substrates, and a pair of alignment films each of which is provided between the substrate and the liquid crystal layer restraining the orientation of the liquid crystals of the liquid crystal layer. The defect repair method includes the step of irradiating laser light onto a region of the alignment film corresponding to the light point defect pixels to locally reduce or eliminate the orientation restraining force of the alignment film, wherein the light point defect pixels are repaired by reducing the intensity of the light transmitted through the region where the orientation restraining force is reduced or eliminated when the liquid crystal is illuminated.