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. 02, 2001
Filed:
Dec. 09, 1999
Hidetoshi Nishikawa, Wakayama, JP;
Noritsu Koki Co., Ltd., Wakayama, JP;
Abstract
A polarizing plate and a double refracting plate, which are allowed to rotate around an optic axis, are provided to the light-exit side of a liquid crystal layer. The double refracting plate splits incident light into an ordinary ray which travels along a straight optic axis and an extraordinary ray which travels along a refracted optic axis, and supplies the same to a printing paper. The double refracting plate is laminated to the polarizing plate in such a manner that the splitting direction of the former matches with the polarizing plate of the latter, thereby allowing only the extraordinary ray to exit from the double refracting plate. By rotating the two plates together as one body by, for example, 90 degrees around the optic axis and exposing the printing paper each time, resolution attained without displacing the liquid crystal layer or printing paper with respect to the other is nearly as high as the one obtained by displacing the liquid crystal layer or printing paper. Because the liquid crystal layer and printing paper do not have to be displaced, no adverse effect, such as vibration, is given to the liquid crystal layer, and the pixel displacement can be readily effected with not only a sheet paper, but also a roll of paper.