Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2007-04-26
2009-12-29
Wong, Tina M (Department: 2874)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S119000, C349S196000
Reexamination Certificate
active
07639328
ABSTRACT:
The present invention relates to a viewing angle controllable liquid crystal display device. The purpose of the present invention is to provide a viewing angle controllable liquid crystal display device applied with TN mode LCD panel in which a narrow view angle mode is possible in bilateral symmetry. In order to achieve above mentioned purposes, the present invention comprises of: a first panel including a TN mode liquid crystal material having a lowest liquid crystal layer aligned to −45° direction from a lateral axis of the device and a upper most liquid crystal layer aligned to +45° direction from the lateral axis, and a upper polarizing plate disposing on the TN mode liquid crystal material and having a light transmission axis parallel to +45° direction from the lateral axis; a half wave plate disposing above the first panel and delaying a phase of light passing the first panel so that a polarization axis determined by the first panel is changed to perpendicular to the lateral axis; and a second panel disposing above the half wave plate, including ECB liquid crystal material and controlling a viewing angle in bilateral symmetry.
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patent: 1702517 (2005-11-01), None
Hollan & Knight LLP
LG Display Co. Ltd.
Wong Tina M
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