LIQUID CRYSTAL DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a fully wide visual-angle characteristic while securing front contrast. SOLUTION: The light which penetrates a polarizing plate 6 and a phase difference plate 4 and is made to outgo from a liquid crystal display element 2 is improved in the visual angle including the directions from 12 hours to 6 hours by a phase difference plate 3. Furthermore front contrast is secured by applying light in the normal direction using a light diffusing plate 7 and light is made to diffuse in the directions between 9 hours to 3 hours which were not improved by the phase difference plate 3. Optical arrangement is constituted so that in the case where the light diffusing plate 7 has directivity, light penetrates the light diffusing plate 7 after passing the polarizing plate 5 and in the case where the plate 7 has no directivity, the light penetrates the polarizer plate 5 after passing the light diffusing plate 7.