Method for driving electrophoretic display device, electrophoretic display device, and electronic device
AssigneeSeiko Epson Corporation
InventorsYoshiki Takei, Eiji Miyasaka
Life of this patent
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Abstract
A method for driving an electrophoretic display device, which includes a first electrode, a second electrode, and an electrophoretic element disposed between the first electrode and the second electrode, the method includes: setting a multiplication of a driving voltage and a voltage application time of the electrophoretic element in a unit period, which displays a first gradation with minimum reflectivity, and a multiplication of a driving voltage and a voltage application time of the electrophoretic element in the unit period, which displays a second gradation with maximum reflectivity, so as to be different from each other.
Claims16
A method for driving an electrophoretic display device, which includes a first electrode, a second electrode, and an electrophoretic element disposed between the first electrode and the second electrode, the first electrode including first and second pixel electrodes, the method comprising:
- first driving the electrophoretic element through the first pixel electrode, which displays a first gradation with minimum reflectivity at a first temperature, by applying a first driving signal pattern for a first unit period with a first driving voltage and a first voltage application time,
- second driving the electrophoretic element through the second pixel electrode, which displays a second gradation with maximum reflectivity at the first temperature, by applying a second driving signal pattern for the first unit period with a second driving voltage and a second voltage application time,
- third driving the electrophoretic element through the first pixel electrode, which displays the first gradation at a second temperature, by applying a third driving signal pattern for a second unit period with a third driving voltage and a third voltage application time, and
- fourth driving the electrophoretic element through the second pixel electrode, which displays the second gradation at the second temperature, by applying a fourth driving signal pattern for the second unit period with a fourth driving voltage and a fourth voltage application time, wherein
- first through fourth multiplications are multiplications of the first through fourth driving voltages and the first through fourth voltage application times, respectively,
- the first multiplication is different from the second multiplication, and
- the first multiplication is different from the third multiplication or the second multiplication is different from the fourth multiplication.
An electrophoretic display device comprising:
- a first electrode;
- a second electrode;
- and
- an electrophoretic element disposed between the first electrode and the second electrode, wherein
- the first electrode includes first and second pixel electrodes,
- the electrophoretic element is driven through the first pixel electrode, which displays a first gradation with minimum reflectivity at a first temperature, by applying a first driving signal pattern for a first unit period with a first driving voltage and a first voltage application time,
- the electrophoretic element is driven through the second pixel electrode, which displays a second gradation with maximum reflectivity at the first temperature, by applying a second driving signal pattern for the first unit period with a second driving voltage and a second voltage application time,
- the electrophoretic element is driven through the first pixel electrode, which displays the first gradation at a second temperature, by applying a third driving signal pattern for a second unit period with a third driving voltage and a third voltage application time,
- the electrophoretic element is driven through the second pixel electrode, which displays the second gradation at the second temperature, by applying a fourth driving signal pattern for the second unit period with a fourth driving voltage and a fourth voltage application time,
- first through fourth multiplications are multiplications of the first through fourth driving voltages and the first through fourth voltage application times, respectively,
- the first multiplication is different from the second multiplication, and
- the first multiplication is different from the third multiplication or the second multiplication is different from the fourth multiplication.
Dependencies are inferred from the claim text.