| 摘要 |
PROBLEM TO BE SOLVED: To obtain a wide viewing angle with sufficient contrast, color characteristics and gradation characteristics. SOLUTION: A plasma addressing driven liquid crystal element 4 is located between polarizing plates 2, 3 and viewing angle compensation members 5, 6 are located between the liquid crystal element 4 and each of the polarizing plates 2, 3 respectively. The liquid crystal element 4 is a twisted nematic(TN) mode element utilizing a positive dielectric anisotropy (Np) liquid crystal. When no voltage is applied, the liquid crystal molecules are aligned in parallel with each of substrates and in one direction and with 5-10 deg. pretilt angle. Then, nb of the viewing angle compensation members 5, 6 is in parallel with ny and their na and nc are inclined with an angle θ with respect to nx, nz around ny, nb. Absorption axes 25, 26 of the polarizing plates 2, 3 are in parallel with directions of principal indices of refraction na1, na2 of the viewing angle compensation members 5, 6 respectively and the directions of the principal indices na1, na2 are in parallel with and reversed to rubbing directions 27, 28. In the case phase difference of the liquid crystal layer 11 is 400-450 nm, phase difference of the viewing angle compensation members 5, 6 is 90-120 nm in the normal direction 31 and 15-25 nm in the plane 30. |
