Driving method of electrophoretic display device, and controller
AssigneeSeiko Epson Corporation
InventorYusuke YAMADA
Life of this patent
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Abstract
A driving method of an electrophoretic display device, which has a plurality of pixels where an electrophoretic layer is interposed between a first electrode and a second electrode, including supplying a first voltage pulse with one polarity of the first polarity and the second polarity to the first pixel in a first display state; supplying a second voltage pulse with the other polarity of the first polarity and the second polarity to the first pixel; supplying a third voltage pulse, which has the same polarity as the polarity of the first voltage pulse and has a duration different from a duration of the first voltage pulse, to a second pixel which is in the first display state; and supplying the second voltage pulse to the second pixel.
Claims8
A driving method of an electrophoretic display device, which has a plurality of pixels where an electrophoretic layer is interposed between a first electrode and a second electrode, and when in a case when the potential of the first electrode is higher than the potential of the second electrode, a potential difference generated between the first electrode and the second electrode is set to a first polarity, and in a case when the potential of the first electrode is lower than the potential of the second electrode, a potential difference generated between the first electrode and the second electrode is set to a second polarity, as a display state of the pixel, a first display state is selected by supplying a voltage with the first polarity to the pixel and a second display state is selected by supplying a voltage with the second polarity to the pixel, and in regard to one pixel in one display state of the first display state and the second display state, a halftone state between the first display state and the second display state is selected according to a total duration of the voltage applied to select the other display state of the first display state and the second display state, comprising:
- supplying a first voltage pulse with one polarity of the first polarity and the second polarity to a first pixel in the first display state of the plurality of pixels;
- supplying a second voltage pulse with the other polarity of the first polarity and the second polarity to the first pixel;
- supplying a third voltage pulse, which has the same polarity as the polarity of the first voltage pulse and has a duration different from a duration of the first voltage pulse, to a second pixel which is in the first display state of the plurality of pixels;
- and
- supplying the second voltage pulse to the second pixel.
A controller for controlling an electrophoretic display device, which has a plurality of pixels where an electrophoretic layer is interposed between a first electrode and a second electrode, and when in a case when the potential of the first electrode is higher than the potential of the second electrode, a potential difference generated between the first electrode and the second electrode is set to a first polarity, and in a case when the potential of the first electrode is lower than the potential of the second electrode, a potential difference generated between the first electrode and the second electrode is set to a second polarity, as a display state of the pixel, a first display state is selected by supplying a voltage with the first polarity to the pixel and a second display state is selected by supplying a voltage with the second polarity to the pixel, and in regard to one pixel in one display state of the first display state and the second display state, a halftone state between the first display state and the second display state is selected according to a total duration of the voltage applied to select the other display state of the first display state and the second display state, the controller executing a driving method comprising:
- supplying a first voltage pulse with one polarity of the first polarity and the second polarity to a first pixel in the first display state of the plurality of pixels;
- supplying a second voltage pulse with the other polarity of the first polarity and the second polarity to the first pixel;
- supplying a third voltage pulse, which has the same polarity as the polarity of the first voltage pulse and has a duration different from a duration of the first voltage pulse, to a second pixel which is in the first display state of the plurality of pixels;
- and
- supplying the second voltage pulse to the second pixel.
Dependencies are inferred from the claim text.