Electrophoretic display device, driving method of the same, and electronic apparatus

1. An electrophoretic display device comprising:

first and second substrates disposed to face each other;

an electrophoretic layer which is disposed between the first substrate and the second substrate and has a plurality of first electrically-charged particles colored into a first color, a plurality of second electrically-charged particles colored into a second color, and a dispersion medium which retains the first and second electrically-charged particles;

first and second pixel electrodes which are disposed on the electrophoretic layer side of the first substrate and driven independently of each other;

an opposite electrode which is disposed on the electrophoretic layer side of the second substrate; and

a reflective electrode which is provided at a position on the first substrate side rather than on the electrophoretic layer,

wherein the first electrically-charged particle has transmittance in a first wavelength region and absorbability in other wavelength regions,

the second electrically-charged particle has reflectivity in a second wavelength region and absorbability in other wavelength regions, and

intensity of a light overlapping the first wavelength region and the second wavelength region is equal to or less than 10% of the maximum value of each light intensity in the first wavelength region and the second wavelength region.

2. The electrophoretic display device according to claim 1 , wherein a first transistor which is connected to the first pixel electrode and a second transistor which is connected to the second pixel electrode are provided for each pixel, and

the first electrically-charged particles and the second electrically-charged particles are electrically charged to have any one of a positive polarity and a negative polarity.

3. The electrophoretic display device according to claim 1 , further comprising:

a first connection electrode formed in a layer on the first substrate side rather than on the first pixel electrode and connected to a drain electrode of the first transistor; and

a second connection electrode connected to a drain electrode of the second transistor,

wherein a plurality of the first pixel electrodes are connected to each other by the first connection electrode, and

a plurality of the second pixel electrodes are connected to each other by the second connection electrode.

4. The electrophoretic display device according to claim 3 , wherein a plurality of through-holes which partially expose the first and second connection electrodes are formed in a covering layer provided on the first substrate so as to cover the first connection electrode and the second connection electrode,

a portion of the first connection electrode which is exposed through the first through-hole is configured to function as the first pixel electrode, and

a portion of the second connection electrode which is exposed through the second through-hole is configured to function as the second pixel electrode.

5. The electrophoretic display device according to claim 1 , wherein a metal oxide film is formed on the surface of the reflective electrode or the surface of the reflective electrode is formed by an oxide.

6. The electrophoretic display device according to claim 1 , wherein the reflective electrode is configured such that an electric potential can be input thereto.

7. The electrophoretic display device according to claim 1 , wherein during a black display, the first electrically-charged particles having transmittance are disposed on the opposite electrode side rather than on the second electrically-charged particles having reflectivity.

8. A method of driving an electrophoretic display device which includes first and second substrates disposed to face each other, an electrophoretic layer which is disposed between the first substrate and the second substrate and has a plurality of first electrically-charged particles colored into a first color, a plurality of second electrically-charged particles colored into a second color, and a dispersion medium which retains the first and second electrically-charged particles, a plurality of first pixel electrodes and a plurality of second pixel electrodes which are disposed on a surface on the electrophoretic layer side of the first substrate and driven independently of each other, an opposite electrode which is disposed on the electrophoretic layer side of the second substrate, and a reflective electrode which is provided at a position on the first substrate side rather than on the electrophoretic layer, wherein the first electrically-charged particle has transmittance in a first wavelength region and absorbability in other wavelength regions, and the second electrically-charged particle has reflectivity in a second wavelength region and absorbability in other wavelength regions, and intensity of a light overlapping the first wavelength region and the second wavelength region is equal to or less than 10% of the maximum value of each light intensity in the first wavelength region and the second wavelength region, the method comprising:

performing a first operation of moving the first electrically-charged particles to the opposite electrode side by applying voltages to the first pixel electrode and the opposite electrode; and

performing a second operation of moving the second electrically-charged particles to the opposite electrode side by applying voltages to the second pixel electrode and the opposite electrode.

9. The method of driving an electrophoretic display device according to claim 8 , wherein between the first operation and the second operation, a difference is provided at application timings of the voltages or the magnitudes of the applied voltages.

10. The method of driving an electrophoretic display device according to claim 8 , wherein in the first operation, an electric potential which repels the first electrically-charged particles is applied to the reflective electrode, and

in the second operation, an electric potential which repels the second electrically-charged particles is applied to the reflective electrode.

11. The method of driving an electrophoretic display device according to claim 8 , further comprising:

a first preset operation of applying different voltages to the first pixel electrode and the second pixel electrode; and

a second preset operation of applying voltages having the opposite polarities to those of the voltages in the first preset operation to the first pixel electrode and the second pixel electrode,

wherein the first preset operation and the second preset operation are alternately carried out for every rewriting of a single screen or plural screens.

12. The method of driving an electrophoretic display device according to claim 8 , wherein the first electrically-charged particles having transmittance are disposed on the opposite electrode side rather than on the second electrically-charged particles having reflectivity.

13. The method of driving an electrophoretic display device according to claim 12 , wherein a substantial number of the first electrically-charged particles are stacked on the opposite electrode in a multilayer state so as to overlap each other.

14. An electronic apparatus comprising: the electrophoretic display device according to claim 1 .

15. A method of driving an electrophoretic display device which includes: first and second substrates disposed to face each other, an electrophoretic layer which is disposed between the first substrate and the second substrate and has a plurality of first electrically-charged particles colored into a first color, a plurality of second electrically-charged particles colored into a second color, and a dispersion medium which retains the first and second electrically-charged particles, a plurality of first pixel electrodes and a plurality of second pixel electrodes which are disposed on a surface on the electrophoretic layer side of the first substrate and driven independently of each other, an opposite electrode which is disposed on the electrophoretic layer side of the second substrate, and a reflective electrode which is provided at a position on the first substrate side rather than on the electrophoretic layer, wherein the first electrically-charged particle has transmittance in a first wavelength region and absorbability in other wavelength regions, and the second electrically-charged particle has reflectivity in a second wavelength region and absorbability in other wavelength regions, the method comprising:

performing a first operation of moving the first electrically-charged particles to the opposite electrode side by applying voltages to the first pixel electrode and the opposite electrode; and

performing a second operation of moving the second electrically-charged particles to the opposite electrode side by applying voltages to the second pixel electrode and the opposite electrode;

a first preset operation of applying different voltages to the first pixel electrode and the second pixel electrode; and

a second preset operation of applying voltages having the opposite polarities to those of the voltages in the first preset operation to the first pixel electrode and the second pixel electrode,

wherein the first preset operation and the second preset operation are alternately carried out for every rewriting of a single screen or plural screens.