Sequential addressing of displays
View Patent ↗A display device includes a row driver configured to provide a row voltage, and a row electrode connected to the row driver. A column driver is configured to provide a column voltage to a column electrode. Further, a common driver is configured to provide a common electrode that includes a negative level. In addition, a controller is configured to switch the common electrode between at least two levels when all rows have a non-select level of the row voltage. The controller may be further configured to switch the common electrode at a substantially same time and with a substantially same voltage swing as a storage voltage of a storage capacitor.
1. A display device comprising:
a row driver configured to provide a row voltage;
a row electrode connected to the row driver;
a column driver configured to provide a column voltage to a first terminal of a pixel;
a column electrode connected to the column driver;
a common driver configured to provide a positive common voltage level to a second terminal of the pixel for a first state of the pixel and a negative common voltage level for a second state of the pixel;
a common electrode connected to the common driver; and
a storage capacitor connected between a capacitor line and the first terminal of the pixel, wherein the capacitor line is connected to a storage driver for providing the storage voltage to the storage capacitor, the storage driver being connected to the common driver for providing a voltage proportional to the common voltage level as the storage voltage.
2. The display of claim 1 , wherein the first state includes one of a white state and a black state of the pixel, and the second state includes another of the white state and black state of the pixel.
3. The display of claim 1 , wherein the column voltage has positive and negative values.
4. The display of claim 1 , wherein at least one of the column driver and the common driver is configured to decrease an image update time by increasing a voltage across the pixel.
5. The display of claim 1 , wherein the row driver is configured to compensate for incomplete charging of a pixel by reducing a negative level of the row voltage.
6. The display device of claim 1 , further comprising a controller configured to switch the common electrode when all rows have a nonselect level of the row voltage, at the start of a row selection period, or during a row selection period.
7. A display device comprising:
a row driver configured to provide a row voltage;
a row electrode connected to the row driver;
a column driver configured to provide a column voltage to a first terminal of a pixel;
a column electrode connected to the column driver;
a common driver configured to provide a positive common voltage level to a second terminal of the pixel for a first state of the pixel and a negative common voltage level for a second state of the pixel;
a common electrode connected to the common driver; and
a storage capacitor connected between a capacitor line and the first terminal of the pixel, wherein the storage voltage is related to the common voltage by a ratio of a storage capacitance value of the storage capacitor and a total capacitance of the pixel.
8. The display device of claim 7 , wherein the first state includes one of a white state and a black state of the pixel, and the second state includes another of the white state and black state of the pixel.
9. The display device of claim 7 , wherein the column voltage has positive and negative values.
10. The display device of claim 7 , wherein at least one of the column driver and the common driver is configured to decrease an image update time by increasing a voltage across the pixel.
11. The display device of claim 7 , wherein the row driver is configured to compensate for incomplete charging of a pixel by reducing a negative level of the row voltage.
12. The display device of claim 7 , further comprising a controller configured to switch the common electrode when all rows have a nonselect level of the row voltage, at the start of a row selection period, or during a row selection period.