Liquid crystal display device having a light path changing means having a porus film with a plurality of pores

Abstract

Disclosed is a liquid crystal display device capable of improving a viewing angle thereof while reducing a gray scale inversion. The liquid crystal display device has a porous film aligned on a liquid crystal display panel and having a plurality of pores. The porous film has sidewalls defined by the pores and reflecting a part of light exited from the liquid crystal display panel. That is, the sidewalls reflect a first group of light, which has relatively higher luminance by passing through a short axis of liquid crystal, towards a second group of light having a relatively lower luminance by passing through a long axis of liquid crystal. Accordingly, the viewing angle of the liquid crystal display device is expanded and the gray scale inversion is reduced.

Description

CROSS-REFERENCE TO RELATED APPLICATION [0001] This application is a divisional of U.S. patent application Ser. No. 10 / 502,955, filed on Jul. 29, 2004, which is a 35 U.S.C. 371 filing of PCT / KR03100175 filed on Jan. 27, 2003 which in turn claims priority to Korean Patent Application No. 2002-5942 filed on Feb. 1, 2002 and Korean Patent Application No.: 2002-40069 filed on Jul. 10, 2002, the disclosures of which are each all incorporated herein by reference in their entirety.TECHNICAL FIELD [0002] The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device capable of improving a viewing angle thereof and simultaneously capable of reducing a gray scale inversion. BACKGROUND ART [0003] Generally, a liquid crystal display (LCD) device includes a first substrate having a first electrode, a second substrate having a second electrode opposite to the first electrode, and liquid crystal disposed between the first and second substr...

AI Technical Summary

Benefits of technology

[0021] The present invention has been made to solve the above problems of the related art, therefore, it is an object of the present invention is to provide a liquid crystal display device capable of improving a viewing angle thereof while reducing a gray scale inversion.

[0028] According to the liquid crystal display device of the present invention, the porous film includes sidewalls defined by a plurality of pores and reflects a first group of light, which is exited from the liquid crystal display panel and passes through a short axis of liquid crystal, towards a second group of light passing through a long axis of liquid crystal. Therefore, a gray scale inversion can be reduced and the viewing angle of the liquid crystal display device can be expanded.

Problems solved by technology

However, an abnormal gray level is found when a viewing position of the user is changed upward or downward the front of the liquid crystal display panel 110.

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