Display method, film and display device using magnetic particles

A display device using magnetic particles, comprising:

• a plurality of particles having a magnetic property and a certain color;
• a solvent in which the plurality of particles are dispersed;
• a first magnetic field application unit that applies a first magnetic field to the particles and the solvent;
• and
• a second magnetic field application unit that applies a second magnetic field to the particles and the solvent,
• wherein the first magnetic field application unit applies the first magnetic field to the plurality of particles in a state where the plurality of particles are dispersed in the solvent so that the plurality of particles are aligned in a direction parallel to a direction of the first magnetic field and the plurality of particle chains are formed, and
• the second magnetic field application unit applies a second magnetic field to at least a part of the formed plurality of particle chains so that at least a part of the plurality of particle chains moves in a direction close to a display surface in an area to which the second magnetic field is applied, and thus the certain color is displayed on the display surface.

A film using magnetic particles, comprising:

• a plurality of particles having a magnetic property and a certain color;
• and
• a solvent in which the plurality of particles are dispersed,
• wherein, if a first magnetic field is applied to the plurality of particles in a state where the plurality of particles are dispersed in the solvent, the plurality of particles are aligned in a direction parallel to a direction of the first magnetic field so that the plurality of particle chains are formed, and
• if a second magnetic field is applied to at least a part of the formed plurality of particle chains, at least a part of the plurality of particle chains moves in a direction close to a display surface in an area to which the second magnetic field is applied, and thus the certain color is displayed on the display surface.