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. 17, 2000
Filed:
Apr. 08, 1999
Hitachi, Ltd., Tokyo, JP;
Abstract
A liquid crystal display has excellent viewing angle characteristics and prevents any reduction of transmittance. A liquid crystal panel has a pair of substrates SUB1, SUB2 sandwiching a liquid crystal layer LC, at least one of the substrates having electrodes DTM for selecting pixels, polarizing plates POL1, POL2 disposed on both sides of the liquid crystal panel to control the transmitted light depending on the state of orientation of liquid crystal molecules by applying a voltage to the electrodes, illumination means BL for illuminating the liquid crystal panel, a driving circuit for applying a voltage in accordance with a display image to the electrodes, and birefringent sheet PDS formed on the outer surface of one of the pair of substrates SUB1 and SUB2 such that the direction of the maximum contrast or luminance becomes the vertical direction and such that viewing angle characteristics become symmetric in the horizontal direction, wherein the liquid crystal layer LC is oriented such that the transmittances of the liquid crystal panel in use in the vertical direction and horizontal direction have asymmetric viewing angle dependence and such that the direction of the maximum contrast or luminance is a direction different from either of the vertical and horizontal directions.