Optical shutter and selective transparent display device using the same

An optical shutter comprising:

• a first substrate;
• a louver layer disposed on the first substrate and formed of a prism pattern having mountains and valleys formed alternately while a plurality of first inclined surfaces and a plurality of second inclined surfaces meet each other;
• a second substrate disposed on the louver layer;
• and
• electrophoretic particles provided in spaces between the louver layer and the second substrate,
• wherein the louver layer comprises a transparent insulating film disposed on at least one of the plurality of second inclined surfaces,
• wherein the first substrate comprises first and second electrodes disposed on an inner surface of the first substrate,
• wherein the second substrate comprises a third electrode disposed on the inner surface of the second substrate,
• wherein the first electrode and the third electrode are disposed opposite to each other,
• wherein the second electrode is disposed between the first electrode and another first electrode,
• wherein the mountains of the louver layer are in contact with the second substrate,
• wherein the first electrode is disposed at a position of one of the valleys, and
• wherein the second electrode is disposed at a position corresponding to a position where one of the mountains and the second substrate are in contact with each other.