Magnetophoresis type display device and process of production of same

A magnetophoresis type display device comprising:

• a transparent front panel sheet,
• a back panel sheet arranged with respect to the front panel sheet so as to form a sealed space with it,
• a partitioning member provided between the front panel sheet and the back panel sheet for partitioning the sealed space into a large number of cells, and
• a liquid dispersion containing magnetic particles to be sealed inside the cells formed by partitioning by the partitioning member,
• the magnetic particles having a magnetization of at least 20.0 emu/g when a magnetic field of 500 Oe is applied to the magnetic particles, and
• the liquid dispersion containing 80 to 90 wt % of a single-color fluid and 10 to 20 wt % of magnetic particles, wherein the single-color fluid is a white fluid that includes at least titanium oxide and silicon oxide in which when the total weight of the white fluid is 100 wt %, the wt % of the titanium oxide in the white fluid is C, and the wt % of the silicon oxide is D, the weight ratio C/D is in the relationship of 1≦C/D≦2.5.

A magnetophoresis type display device comprising:

• a transparent front panel sheet,
• a back panel sheet arranged with respect to the front panel sheet so as to form a sealed space with it,
• a partitioning member provided between the front panel sheet and the back panel sheet for partitioning the sealed space into a large number of cells, and
• a liquid dispersion containing magnetic particles to be sealed inside the cells formed by partitioning by the partitioning member,
• the magnetic particles having a magnetization of at least 20.0 emu/g when a magnetic field of 500 Oe is applied to the magnetic particles, and
• the liquid dispersion containing 80 to 90 wt % of a single-color fluid and 10 to 20 wt % of magnetic particles, wherein the single-color fluid is a white fluid that includes at least titanium oxide and silicon oxide in which when the total weight of the white fluid is 100 wt %, the wt % of the titanium oxide in the white fluid is C, and the wt % of the silicon oxide is D, the weight ratio C/D is in the relationship of 1≦C/D≦2.5 and the weight C+D is in the relationship of 3.0 wt %≦C+D≦6.0 wt %.

A magnetophoresis type display device comprising:

• a transparent front panel sheet,
• a back panel sheet arranged with respect to the front panel sheet so as to form a sealed space with it,
• a partitioning member provided between the front panel sheet and the back panel sheet for partitioning the sealed space into a large number of cells, and
• a liquid dispersion containing magnetic particles to be sealed inside the cells formed by partitioning by the partitioning member,
• the magnetic particles having a magnetization of at least 20.0 emu/g when a magnetic field of 500 Oe is applied to the magnetic particles, and
• the liquid dispersion containing 80 to 90 wt % of a single-color fluid and 10 to 20 wt % of magnetic particles, wherein the single-color fluid is a white fluid that includes at least isoparaffin and a mixture of a plurality of white inorganic oxides in which when the total weight of the white fluid is 100 wt %, the wt % of the isoparaffin in the white fluid is A and the wt % of the mixture of the white inorganic oxides is B, the weight ratio A/B is in the relationship of 1≦A/B≦20.

A magnetophoresis type display device comprising:

• a transparent front panel sheet,
• a back panel sheet arranged with respect to the front panel sheet so as to form a sealed space with it,
• a partitioning member provided between the front panel sheet and the back panel sheet for partitioning the sealed space into a large number of cells, and
• a liquid dispersion containing magnetic particles to be sealed inside the cells formed by partitioning by the partitioning member,
• the magnetic particles having a magnetization of at least 20.0 emu/g when a magnetic field of 500 Oe is applied to the magnetic particles, and
• the liquid dispersion containing 80 to 90 wt % of a single-color fluid and 10 to 20 wt % of magnetic particles, wherein the single-color fluid includes at least a dispersion medium and a single-color pigment in which when the total weight of the single-color fluid is 100 wt %, the wt % of the dispersion medium in the single color fluid is A′, and the wt % of the single-color pigment is B′, the weight ratio A′/B′ is in the relationship of 10≦A′/B′≦20.

A magnetophoresis type display device comprising:

• a transparent front panel sheet,
• a back panel sheet arranged with respect to the front panel sheet so as to form a sealed space with it,
• a partitioning member provided between the front panel sheet and the back panel sheet for partitioning the sealed space into a large number of cells, and
• a liquid dispersion containing magnetic particles to be sealed inside the cells formed by partitioning by the partitioning member,
• the magnetic particles having a magnetization of at least 20.0 emu/g when a magnetic field of 500 Oe is applied to the magnetic particles, and
• the liquid dispersion containing 80 to 90 wt % of a single-color fluid and 10 to 20 wt % of magnetic particles, wherein the partitioning member is comprised of paper coated with a resin.

A magnetophoresis type display device comprising:

• a transparent front panel sheet,
• a back panel sheet arranged with respect to the front panel sheet so as to form a sealed space with it,
• a partitioning member provided between the front panel sheet and the back panel sheet for partitioning the sealed space of a thickness of 0.8 to 1.5 mm into a large number of cells, and
• a liquid dispersion containing magnetic particles to be sealed inside the cells formed by partitioning by the partitioning member,
• the magnetic particles containing 60 to 90 wt % of a magnetic material and 10 to 40 wt % of a synthetic resin and/or coloring agent, the mean particle size of the magnetic particles being 50 to 200 μm, the magnetization of the magnetic particles when a 200 Oe magnetic field is applied to the magnetic particles being at least 8.0 emu/g, and the magnetization of the magnetic particles when a 500 Oe magnetic field is applied to the magnetic particles being at least 20.0 emu/g,
• the liquid dispersion containing 80 to 90 wt % of a single-color fluid and 10 to 20 wt % of magnetic particles, wherein the single-color fluid is a white fluid that includes at least titanium oxide and silicon oxide in which when the total weight of the white fluid is 100 wt %, the wt % of the titanium oxide in the white fluid is C, and the wt % of the silicon oxide is D, the weight ratio C/D is in the relationship of 1≦C/D≦2.5 and the weight C+D is in the relationship of 3.0 wt %≦C+D≦6.0 wt %.

A magnetophoresis type color display device comprising:

• a transparent front panel sheet,
• a back panel sheet arranged with respect to the front panel sheet so as to form a sealed space with it,
• a partitioning member provided between the front panel sheet and the back panel sheet for partitioning the sealed space of a thickness of 0.8 to 1.5 mm into a large number of cells,
• a first liquid dispersion containing first colored magnetic particles to be sealed inside selected specific cells formed by partitioning by the partitioning member, and
• a second liquid dispersion containing second colored magnetic particles to be sealed inside selected specific cells in the cells in which the first liquid dispersion is not sealed and colored different from the first colored magnetic particles,
• the mean particle sizes of the first colored magnetic particles and the second colored magnetic particles being 50 to 200 μm and the magnetization of the magnetic particles when a 500 Oe magnetic field is applied to the magnetic particles being at least 20.0 emu/g, wherein the first liquid dispersion is a liquid comprised of a single-color fluid in which the first colored magnetic particles are dispersed, while the second liquid dispersion is a single-color fluid in which the second colored magnetic particles are dispersed, the single-color fluid is a white fluid that includes at least isoparaffin and a mixture of a plurality of white inorganic oxides in which when the total weight of the white fluid is 100 wt %, the wt % of the isoparaffin in the white fluid is A and the wt % of the mixture of the white inorganic oxides is B, weight ratio A/B is in the relationship of 10≦A/B≦20.

A magnetophoresis type color display device comprising:

• a transparent front panel sheet,
• a back panel sheet arranged with respect to the front panel sheet so as to form a sealed space with it,
• a partitioning member provided between the front panel sheet and the back panel sheet for partitioning the sealed space of a thickness of 0.8 to 1.5 mm into a large number of cells,
• a first liquid dispersion containing first colored magnetic particles to be sealed inside selected specific cells formed by partitioning by the partitioning member, and
• a second liquid dispersion containing second colored magnetic particles to be sealed inside selected specific cells in the cells in which the first liquid dispersion is not sealed and colored different from the first colored magnetic particles,
• the mean particle sizes of the first colored magnetic particles and the second colored magnetic particles being 50 to 200 μm and the magnetization of the magnetic particles when a 500 Oe magnetic field is applied to the magnetic particles being at least 20.0 emu/g, wherein the first liquid dispersion is a liquid comprised of a single-color fluid in which the first colored magnetic particles are dispersed, while the second liquid dispersion is a single-color fluid in which the second colored magnetic particles are dispersed, the single-color fluid includes at least a dispersion medium and a single-color pigment in which when the total weight of the single-color fluid is 100 wt %, the wt % of the dispersion medium in the single-color fluid is A′, and the wt % of the single-color pigment is B′, the weight ratio A′/B′ is in the relationship of 10≦A′/B′≦20.

A magnetophoresis type display device comprising

• a transparent front panel sheet comprised of polyethylene terephthalate,
• a back panel sheet arranged with respect to the front panel sheet so as to form a sealed space with it,
• a partitioning member provided between the front panel sheet and the back panel sheet for partitioning the sealed space of a thickness of 0.8 to 1.5 mm into a large number of cells, and
• a liquid dispersion containing magnetic particles to be sealed inside the individual cells formed by partitioning by the partitioning member, wherein the magnetic particles have a mean particle size of 50 to 200 μm and further have a magnetization of 20.0 emu/g when a 500 Oe magnetic field is applied to the magnetic particles.

A magnetophoresis type display device comprising

• a transparent front panel sheet comprised of polyethylene terephthalate,
• a back panel sheet arranged with respect to the front panel sheet so as to form a sealed space with it,
• a partitioning member provided between the front panel sheet and the back panel sheet for partitioning the sealed space of a thickness of 0.8 to 1.5 mm into a large number of cells, and
• a liquid dispersion containing magnetic particles to be sealed inside the individual cells formed by partitioning by the partitioning member, wherein the liquid dispersion is a liquid comprised of a single-color fluid in which colored magnetic particles are dispersed and the viscosity of the single-color fluid is 200 to 800 cp at 25° C.

A magnetophoresis type display device comprising

• a transparent front panel sheet comprised of polyethylene terephthalate,
• a back panel sheet arranged with respect to the front panel sheet so as to form a sealed space with it,
• a partitioning member provided between the front panel sheet and the back panel sheet for partitioning the sealed space of a thickness of 0.8 to 1.5 mm into a large number of cells, and
• a liquid dispersion containing magnetic particles to be sealed inside the individual cells formed by partitioning by the partitioning member, wherein the liquid dispersion is a liquid comprised of a single-color fluid in which colored magnetic particles are dispersed and the viscosity of the single-color fluid is 200 to 800 cp at 25° C., wherein the single-color fluid is a white fluid.

A magnetophoresis type display device comprising

• a transparent front panel sheet comprised of polyethylene terephthalate,
• a back panel sheet arranged with respect to the front panel sheet so as to form a sealed space with it,
• a partitioning member provided between the front panel sheet and the back panel sheet for partitioning the sealed space of a thickness of 0.8 to 1.5 mm into a large number of cells, and
• a liquid dispersion containing magnetic particles to be sealed inside the individual cells formed by partitioning by the partitioning member, wherein the liquid dispersion is a liquid comprised of a single-color fluid in which colored magnetic particles are dispersed and the viscosity of the single-color fluid is 200 to 800 cp at 25° C., wherein the single-color fluid is a white fluid that includes at least isoparaffin and a mixture of a plurality of white inorganic oxides in which when the total weight of the white fluid is 100 wt %, the wt % of the isoparaffin in the white fluid is A and the wt % of the mixture of the white inorganic oxides is B, the weight ratio A/B is in the relationship of 10≦A/B≦20.

A magnetophoresis type display device comprising

• a transparent front panel sheet comprised of polyethylene terephthalate,
• a back panel sheet arranged with respect to the front panel sheet so as to form a sealed space with it,
• a partitioning member provided between the front panel sheet and the back panel sheet for partitioning the sealed space of a thickness of 0.8 to 1.5 mm into a large number of cells, and
• a liquid dispersion containing magnetic particles to be sealed inside the individual cells formed by partitioning by the partitioning member, wherein the liquid dispersion is a liquid comprised of a single-color fluid in which colored magnetic particles are dispersed and the viscosity of the single-color fluid is 200 to 800 cp at 25° C., wherein the single-color fluid includes at least a dispersion medium and a single-color pigment in which when the total weight of the single-color fluid is 100 wt %, the wt % of the dispersion medium in the single-color fluid is A′, and the wt % of the single-color pigment is B′, the weight ratio A′/B′ is in the relationship of 10≦A′/B′≦20.

A magnetophoresis type display device comprising

• a transparent front panel sheet comprised of polyethylene terephthalate,
• a back panel sheet arranged with respect to the front panel sheet so as to form a sealed space with it,
• a partitioning member provided between the front panel sheet and the back panel sheet for partitioning the sealed space of a thickness of 0.8 to 1.5 mm into a large number of cells, and
• a liquid dispersion containing magnetic particles to be sealed inside the individual cells formed by partitioning by the partitioning member, wherein the partitioning member is comprised of paper coated with a resin.