Patent attributes
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.
