Reflective type display apparatus using dielectrophoresis and method of manufacturing the reflective type display apparatus

A display apparatus comprising:

• a first substrate and a second substrate arranged to face each other;
• a hydrophobic insulating layer on the first substrate, the hydrophobic insulating layer divided into a plurality of pixel areas;
• a hydrophobic pattern electrode unit arranged in each of the plurality of pixel areas to form a non-uniform electric field according to an applied voltage;
• a hydrophilic dielectric medium with hydrophobic uncharged color particles distributed therein in a cell area between the first substrate and the second substrate;
• and
• an absorbing plate arranged under the first substrate,
• wherein the hydrophobic pattern electrode unit includes patterns separated by spaces therebetween, and
• wherein the hydrophobic pattern electrode unit is configured such that when a voltage is not applied thereto, the hydrophobic uncharged color particles are settled down in the hydrophilic dielectric medium to contact the hydrophobic insulating layer and the hydrophobic pattern electrode unit and cover the cell area, and the hydrophobic pattern electrode unit is configured such that when a voltage is applied thereto, the hydrophobic uncharged color particles are concentrated in the spaces between the patterns so that incident light can pass through the cell area.

A method of manufacturing a display apparatus, comprising:

• forming a hydrophobic insulating layer on a first substrate;
• defining a plurality of pixel areas on the hydrophobic insulating layer;
• forming a hydrophobic pattern electrode unit in each of the plurality of pixel areas, the hydrophobic pattern electrode unit configured to produce a non-uniform electric field according to an applied voltage;
• forming a hydrophilic dielectric medium with hydrophobic uncharged particles distributed therein in each of the plurality of pixel areas;
• and
• arranging a reflective plate under the first substrate,
• wherein the hydrophobic pattern electrode unit includes patterns separated by spaces therebetween, and
• wherein the hydrophobic pattern electrode unit is configured such that when a voltage is not applied thereto, the hydrophobic uncharged particles are settled down in the hydrophilic dielectric medium to contact the hydrophobic insulating layer and the hydrophobic pattern electrode unit and cover the pixel areas, and the hydrophobic pattern electrode unit is configured such that when a voltage is applied thereto, the hydrophobic uncharged particles are concentrated in the spaces between the patterns so that incident light can pass through the pixel areas.

A method of manufacturing a display apparatus, comprising:

• defining a plurality of pixel areas on a hydrophobic insulating layer;
• forming a hydrophobic pattern electrode unit in each of the plurality of pixel areas, the hydrophobic pattern electrode unit configured to produce a non-uniform electric field according to an applied voltage;
• forming a hydrophilic dielectric medium with hydrophobic uncharged color particles distributed therein in each of the plurality of pixel areas;
• and
• arranging an absorbing plate under the hydrophobic insulating layer,
• wherein the hydrophobic pattern electrode unit includes patterns separated by spaces therebetween, and
• wherein the hydrophobic pattern electrode unit is configured such that when a voltage is not applied thereto, the hydrophobic uncharged color particles are settled down in the hydrophilic dielectric medium to contact the hydrophobic insulating layer and the hydrophobic pattern electrode unit and cover the pixel areas, and the hydrophobic pattern electrode unit is configured such that when a voltage is applied thereto, the hydrophobic uncharged color particles are concentrated in the spaces between the patterns so that incident light can pass through the pixel areas.