| 摘要 |
<p>The present invention provides a liquid crystal display device that has a higher contrast ratio in a wide viewing angle and that can be easily produced at low cost. The present invention is a liquid crystal display device, including in the following order:
a first polarizer;
a first quarter-wavelength plate (nx > ny ‰¥ nz);
a liquid crystal cell;
a second quarter-wavelength plate having an Nz coefficient substantially the same as that of the first quarter-wavelength plate;
a birefringent layer (II) (nx < ny ‰¤ nz); and
a second polarizer,
wherein
the first birefringent layer (I) has an in-plane slow axis forming an angle of about 45° with an absorption axis of the first polarizer;
the second birefringent layer (I) has an in-plane slow axis substantially orthogonal to the in-plane slow axis of the first birefringent layer (I);
the second polarizer has an absorption axis substantially orthogonal to the absorption axis of the first polarizer;
the birefringent layer (II) has an in-plane fast axis substantially orthogonal to the absorption axis of the second polarizer; and
the LC cell displays a black screen by aligning liquid crystal molecules in the liquid crystal layer substantially vertically to the substrate surface.</p> |
