| abstract |
An electrophoretic display device capable of high-quality display with excellent contrast and a high aperture ratio with reduced residual electrophoretic particles. In the electrophoretic display device, a plurality of cells 6 are configured by providing a pair of front electrodes 4 and a back electrode 5 each having at least a front electrode 4 transparent, and providing a partition wall 7 between the electrodes. It is assumed that the electrophoretic dispersion liquid 11 including the electrophoretic particles 13 and the dispersion liquid 12 is accommodated, and the shape of the cell in the cross section parallel to the electrode is a square or more square and is extended in different directions. And the wall surface 7a of the partition wall 7 is inclined so that the partition wall section width on the front electrode side is narrower than the partition wall section width on the back electrode side. The angle between the surface electrode and the back electrode is 45 ° to 90 °, the angle between the wall surface and the back electrode is within the range of 90 ° to 135 °, and the average particle diameter d of the electrophoretic particles 13 is within the range of 0.01 to 100 μm. And d <R between the radius of curvature R The relationship shall be established. [Selection] Figure 2 |