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US 6,603,523 B2Granted
Liquid crystal display device
AssigneeSharp Kabushiki Kaisha
InventorsMasako Nakamura, Makoto Shiomi, Yoshito Hashimoto
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AssigneeSharp Kabushiki Kaisha
InventorsMasako Nakamura, Makoto Shiomi, Yoshito Hashimoto
Estimating the term…
A liquid crystal display device includes a pair of polarizing plates; a liquid crystal panel interposed between the pair of polarizing plates and including a liquid crystal layer having a pair of regions corresponding to each of pixels, alignment directions of liquid crystal molecules in the pair of regions being different by about 180 degrees from each other, the liquid crystal panel having a first slow axis; a first phase plate having a second slow axis which is horizontal to a surface thereof and perpendicular to the first slow axis; and a second phase plate having a third slow axis which is perpendicular to both of the first slow axis and the second slow axis. The liquid crystal material has a dependency of birefringence anisotropy (Δn) from 20° C. to 60° C. ([Δn(20° C.)−Δn(60° C.)]/40) of 0.00026 or less.
A liquid crystal display device, comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Structural association of cells with optical devices, e.g. polarisers or reflectors: birefringent elements, e.g. for optical compensation
Function characteristic: thermal instability, i.e. DC drift, of an optical modulator; Arrangements or methods for the reduction thereof
Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position,…:…
Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position,…:…
Term ended 10 Jan 2022 (estimated)
1. Field of the Invention
The present invention relates to a liquid crystal display device of a normally black mode, and specifically to a liquid crystal display device preferably usable for displays requiring a wide viewing angle, such as TVs and monitors for personal computers including personal computers used for CAD. In this specification, the liquid crystal display device will be referred to as the “LCD device”.
2. Description of the Related Art
FIG. 1 is a schematic view of an LCD device according to one example of the present invention;
FIG. 2 is a schematic view of an LCD device according to another example of the present invention;
FIG. 3 is a schematic view of another LCD device according to still another example of the present invention;
Hereinafter, the present invention will be described by way of illustrative examples with reference to the accompanying drawings.
FIG. 1 is a schematic view illustrating a structure of an LCD device 100 according to one example of the present invention.
The LCD device 100 includes a liquid crystal panel 2, a horizontal phase plate (first phase plate) 3, a vertical phase plate (second phase plate) 4, and another horizontal phase plate 5, and a pair of polarizing plates 11 and 12 arranged in a crossed Nicols state. The liquid crystal panel 2, the horizontal phase plate 3, the vertical phase plate 4, and the horizontal phase plate 5 are arranged in a stacked manner in this order and interposed between the pair of polarizing plates 11 and 12. Arrows D, C and B shown with respect to the phase plates 3, 4 and 5 indicate the respective slow axis. Arrows E and A shown with respect to the polarizing plates 11 and 12 indicate the respective absorption axes (or polarizing axes).