Liquid crystal display device
AssigneeSharp Kabushiki Kaisha
InventorsAkira Sakai, Masahiro Hasegawa, Takayuki Nishiyama
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AssigneeSharp Kabushiki Kaisha
InventorsAkira Sakai, Masahiro Hasegawa, Takayuki Nishiyama
Estimating the term…
The present invention provides a liquid crystal display device which can achieve cost reduction, excellent productivity, and a high contrast ratio within a wide viewing angle range. The liquid crystal display device of the present invention includes, in the order set forth, a first polarizer, a first λ/4 plate, a liquid crystal cell, a second λ/4 plate, a third Type-I birefringent layer, a Type-IV birefringent layer, and a second polarizer. An in-plane slow axis of the first λ/4 plate forms an angle of about 45° with an absorption axis of the first polarizer. An in-plane slow axis of the second λ/4 plate is substantially perpendicular to the in-plane slow axis of the first λ/4 plate. An absorption axis of the second polarizer is substantially perpendicular to the absorption axis of the first polarizer. An in-plane slow axis of the third Type-I birefringent layer is substantially parallel with the absorption axis of the second polarizer. The liquid crystal display device displays a black screen by aligning liquid crystal molecules in the liquid crystal layer in the direction substantially vertical to the substrate surface.
A liquid crystal display device comprising, in the order set forth:
A liquid crystal display device comprising, in the order set forth:
21-26. (canceled)
Dependencies are inferred from the claim text.