SPATIAL OPTICAL MODULATION ELEMENT, AND PROJECTOR

摘要

PROBLEM TO BE SOLVED: To make it possible to obtain a high light shielding degree to a strong incident light as well without degrading photoelectric transducing efficiency by forming a light shielding layer on one surface on the inner side of a reflection electrode and impressing the voltages meeting the brightness of respective pixels of input images on the respective electrodes of a driving electrode. SOLUTION: A glass substrate 1a provided with a transparent electrode 2b, an a-Si photoconductive layer 3, the driving electrode 8, the light shielding layer 4 and the reflection electrode 5 and a glass substrate 1b provided with a transparent electrode 2a are provided with a uniform spacing by using beads 7 between the transparent electrode 2a and the reflection electrode 5 and a liquid crystal layer 6 is held in this spacing, by which the spatial optical modulation element 100 is constituted. The light shielding layer 4 is formed flush between the reflection electrode 5 and the driving electrode 8 and has plural contact holes 9 arranged in a matrix form. The glass substrate 1b, the transparent electrodes 2b and the a-Si photoconductive layer 3 constitute voltage impressing means for impressing the voltages meeting the brightness of the respective pixels of the input images to the respective electrodes of the driving electrode 8. The optical writing by photoelectric transduction is thus executed.