Driving method of electrophoretic display
A driving method of an electrophoretic display having at least one display particle is provided. The driving method includes the following steps. A first voltage difference is applied to a data line in a first period, in which the data line corresponds to one of the display particles. At least one particle restore period is inserted in the first period, and a second voltage difference is applied to the data line in the particle restore periods, in which the second voltage difference is different from the first voltage difference. With this method disclosed here, the maxima brightness, maxima darkness, contrast ratio, color saturation, bistability, and image updating time can be largely improved.
1. A driving method of an electrophoretic display, the electrophoretic display having at least one display particle, the driving method comprising:
applying a first voltage difference including a first polarity to a white data line in a first period, wherein the white data line corresponds to one of the display particles, and applying the first voltage difference including a second polarity to a black data line in a second period, wherein the black data line corresponds to another one of the display particles, wherein the first polarity of the first voltage difference applied to the white data line in the first period is opposite to the second polarity of the first voltage difference applied to the black data line in the second period, and the first period is different from the second period in timing;
inserting at least one particle restore period in the first period only for the white data line, inserting the at least one particle restore period in the second period only for the black data line, and
respectively applying a second voltage difference including a third polarity to the white data line in the at least one particle restore period of the first period or respectively applying a second voltage difference including a fourth polarity to the black data line in at least one the particle restore period of the second period, wherein the third polarity of the second voltage difference applied to the white data line in the at least one particle restore period of the first period is opposite to the fourth polarity of the second voltage difference applied to the black data line in the at least one particle restore period of the second period, wherein the second voltage difference is different from the first voltage difference, the second voltage difference is applied to the white data line only during the first period and applied to the black data line only during the second period, and when more than one particle restore periods are inserted, the particle restore periods are not adjacent to each other.
2. The driving method of the electrophoretic display as claimed in claim 1 , wherein the first period is a pre-charge period, a gray-level write period, a reset period, or a frame follow period.
3. The driving method of the electrophoretic display as claimed in claim 1 , wherein the first voltage difference and the second voltage difference are formed between the white data line or the black data line and a common electrode of the electrophoretic display.
4. The driving method of the electrophoretic display as claimed in claim 1 , wherein when more than one particle restore periods are inserted, the second voltage differences respectively applied to the white data line or the black data line in the particle restore periods are different from each other.
5. The driving method of the electrophoretic display as claimed in claim 1 , wherein when more than one particle restore periods are inserted, the cycles of the particle restore periods inserted in the first period and the second period are the same.