Electrophoretic device and electronic equipment

1. An electrophoretic device, comprising:

a pair of electrodes;

an electrophoretic dispersion liquid including an electrophoretic particle and a dispersion medium and having electric properties of electric resistance R ep and capacitance C ep ;

a microcapsule in which the electrophoretic dispersion liquid is enclosed and provided between the pair of the electrodes; and

a binder layer fixing the microcapsule between the electrodes and having electric properties of electric resistance R b and capacitance C b , and

wherein a ratio of the electric properties of the electrophoretic dispersion liquid and the binder layer satisfies a relationship R b C b ≦R ep C ep .

2. The electrophoretic device, according to claim 1 , a ratio of the resistivity to the relative permittivity of the electrophoretic dispersion liquid and the binder layer satisfies a relationship σ b ε b ≦σ ep ε ep where σ b is resistivity of the binder layer, ε b is relative permittivity of the binder layer, σ ep is resistivity of the electrophoretic dispersion liquid and ε ep is relative permittivity of the electrophoretic dispersion liquid.

3. The electrophoretic device, according to claim 2 , wherein a resistivity adjuster that lowers the binder layer resistivity σ b is added to the binder layer.

4. The electrophoretic device, according to claim 2 , wherein a permittivity adjuster that lowers the binder layer relative permittivity ε b is added to the binder layer.

5. An electronic equipment, comprising the electrophoretic device according to claim 1 as a display means.