Patent ID: 7477442

Claim:
A display apparatus comprising: a sheet-form porous body which has plural holes dispersively formed to run through in a thickness direction thereof and has at least a light transmitting part to change its optical property in the thickness direction; a liquid filled in each of the holes of the porous body, which has a light transmitting part and a part differing from the light transmitting part in optical property, the part differing in optical property being capable of changing its position in the thickness direction through voltage application thereto; a pair of substrates of which at least one is transmissive of light and which hold the porous body on both sides thereof in the thickness direction so as to seal up the holes each filled with the liquid; a transparent electrode disposed on one side of the pair of substrates; and a counter electrode disposed on the other side of the pair of substrates, which enables electric field application to the liquid in the holes with the transparent electrode.