Sequential addressing of displays
View Patent ↗A display device ( 500 ) includes a row driver ( 520 ) configured to provide a row voltage, and a row electrode ( 320 ) connected to the row driver ( 520 ). A column driver ( 530 ) is configured to provide a column voltage to a column electrode ( 330 ). Further, a common driver ( 570 ) is configured to provide a common electrode ( 170 ) that includes a negative level. In addition, a controller ( 515 ) is configured to switch the common electrode ( 170 ) between at least two levels when all rows have a non-select level of the row voltage. The controller ( 515 ) may be further configured to switch the common electrode ( 170 ) 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 controller configured to switch the common electrode: (1) when all rows have a non-select level of the row voltage, (2) at the start of a row selection period or (3) during a row selection period.
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. 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;
a storage capacitor connected between a capacitor line and the first terminal of the pixel; and
a controller configured to switch the common electrode at a substantially same time and with a voltage swing corresponding to a voltage of the storage voltage of the storage capacitor.
7. The display of claim 6 , 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.
8. The display of claim 6 , wherein the capacitor line is connected to a storage driver for providing the storage voltage to the storage capacitor, the storage driver operating independently from the common driver and being controlled by the controller.
9. The display of claim 6 , 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.
10. 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 common voltage to a second terminal of the pixel;
a common electrode connected to the common driver; and
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.
11. The display of claim 10 , wherein one of the at least two levels of the common voltage includes a negative level.
12. The display of claim 10 , 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.
13. The display of claim 10 , wherein the row driver is configured to compensate for incomplete charging of a pixel by reducing a negative level of the row voltage.
14. The display of claim 10 , further comprising a storage capacitor connected between a capacitor line and the first terminal of the pixel; wherein the controller is configured to switch the common electrode at a substantially same time and with a voltage swing corresponding to a voltage of the storage voltage of the storage capacitor.
15. The display of claim 14 , 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.
16. The display of claim 14 , wherein the capacitor line is connected to a storage driver for providing the storage voltage to the storage capacitor, the storage driver operating independently from the common driver and being controlled by the controller.
17. A method of driving a display device having a row electrode, a column electrode and a common electrode, comprising the acts of:
applying a row voltage to the row electrode;
applying a column voltage to the column electrode;
applying a common voltage to the common electrode; and
switching the common electrode between at least two levels when all rows have a non-select level of the row voltage.
18. The method of claim 17 , wherein one of the at least two levels of the common voltage includes a negative level.
19. The method of claim 17 , further comprising the act of decreasing an image update time by increasing a voltage across the pixel.
20. The method of claim 17 , further comprising the act of compensating for incomplete charging of a pixel by reducing a negative level of the row voltage.
21. The method of claim 17 , wherein switching act includes switching the common electrode at a substantially same time and with a voltage swing corresponding to a voltage of the storage voltage of the storage capacitor.
22. The method of claim 21 , wherein a voltage proportional to the common voltage level is provided as the storage voltage.
23. The method of claim 21 , wherein the storage voltage and the common voltage are provided by mutually independent drivers under common control.