Electrophoretic display device, control circuit, electronic apparatus, and driving method for reducing image flicker
View Patent ↗Provided is an electrophoretic display device including: an electrophoretic panel which is provided with an electrophoretic element which includes a first electrode, a second electrode which faces the first electrode, and a charged particle arranged between the first electrode and the second electrode; and a control circuit which controls the electrophoretic panel. The control circuit controls a data voltage with a value which corresponds to the specified gradation of the electrophoretic element to be applied between the first electrode and the second electrode in a writing period, and controls a correction voltage which is the opposite polarity to the data voltage and is less than or equal to a predetermined threshold value to be applied between the first electrode and the second electrode in a correction period which is different from the writing period.
1. An electrophoretic display device comprising:
an electrophoretic panel which is provided with an electrophoretic element which includes a first electrode, a second electrode which faces the first electrode, particle arranged between the first electrode and the second electrode, and an ion different from the electrophoretic particle arranged between the first electrode and the second electrode, wherein the electrophoretic particle moves at an applied voltage greater than that of the ion; and
a control circuit which controls the electrophoretic panel, wherein
the control circuit controls a data voltage with a value which corresponds to a specified gradation of the electrophoretic element to be applied between the first electrode and the second electrode in a writing period,
the control circuit controls a correction voltage which is the opposite polarity to the data voltage and is less than or equal to a predetermined threshold value to be applied between the first electrode and the second electrode in a correction period which is different from the writing period, and
the control circuit controls
a first absolute value of a first time integration value of a first electric current, the first electric current flows between the first electrode and the second electrode due to movement of the ion during the writing period,
a second absolute value of a second time integration value of a second electric current, the second electric current flows between the first electrode and the second electrode due to movement of the ion during the correction period, and
the first absolute value of the first time integration value of the first electric current is equal to the second absolute value of the second time integration value of the second electric current.
2. An electronic apparatus comprising:
the electrophoretic display device according to claim 1 .
3. A control circuit, which controls an electrophoretic panel, which is provided with an electrophoretic element which has a first electrode, a second electrode which faces the first electrode, and an electrophoretic particle and an ion different from the electrophoretic particle are arranged between the first electrode and the second electrode,
wherein a data voltage with a value which corresponds to a specified gradation of the electrophoretic element is controlled to be applied between the first electrode and the second electrode in a writing period,
a correction voltage which is the opposite polarity to the data voltage and is less than or equal to a predetermined threshold value is controlled to be applied between the first electrode and the second electrode in a correction period after the writing period, and
a first absolute value of a first time integration value of a first electric current is controlled to be equal to a second absolute value of a second time integration value of a second electric current, the first electric current flows between the first electrode and the second electrode due to movement of the ion during the writing period, and the second electric current flows between the first electrode and the second electrode due to movement of the ion during the correction period.
4. A driving method of an electrophoretic element, which has a first electrode, a second electrode which faces the first electrode, and an electrophoretic particle and an ion different from the electrophoretic particle are arranged between the first electrode and the second electrode, the driving method comprising:
applying a data voltage with a value which corresponds to the specified gradation of the electrophoretic element between the first electrode and the second electrode in a writing period;
applying a correction voltage which is the opposite polarity to the data voltage and is less than or equal to a predetermined threshold value between the first electrode and the second electrode in a correction period after the writing period; and
controlling a first absolute value of a first time integration value of a first electric current to be equal to a second absolute value of a second time integration value of a second electric current, wherein the first electric current flows between the first electrode and the second electrode due to movement of the ion during the writing period, and the second electric current flows between the first electrode and the second electrode due to movement of the ion during the correction period.