Display substrate controlling voltage applied from common electrode voltage input line to common electrode, display device and method for driving the same
A display substrate, a display device and a method for driving the same are provided. The display substrate includes a plurality of sub-regions. At least one subpixel unit, a common electrode voltage input line, a common electrode voltage control line and at least one control TFT are arranged at each sub-region. At each sub-region, a gate electrode of the control TFT is coupled to the common electrode voltage control line, a source electrode of the control TFT is coupled to the common electrode voltage input line, and a drain electrode of the control TFT is coupled to a common electrode of the subpixel unit.
1. A display substrate, comprising a plurality of sub-regions, wherein at least one sub-region comprises at least one subpixel unit, a common electrode voltage input line, a common electrode voltage control line and at least one control Thin Film Transistor (TFT); anda gate electrode of the control TFT is coupled to the common electrode voltage control line, a source electrode of the control TFT is coupled to the common electrode voltage input line, and a drain electrode of the control TFT is coupled to a common electrode of the subpixel unit,
the display substrate further comprises a gate line and a data line, wherein the common electrode voltage input line and the common electrode voltage control line are arranged parallel to the gate line, and created from a same layer and made of a same material with the gate line,
the common electrode voltage input line and the common electrode voltage control line coupled to the subpixel units in an identical row are arranged at an identical side of the row of subpixel units, and the gate line is arranged at an opposite side of the row of subpixel units,
each subpixel unit corresponds to a distinct control TFT and one switch TFT, a gate electrode of the switch TFT is coupled to the gate line, a source electrode of the switch TFT is coupled to the data line, and a drain electrode of the switch TFT is coupled to a pixel electrode.
2. The display substrate according to claim 1 , wherein the at least one sub-region each comprises at least one row of subpixel units.
3. The display substrate according to claim 2 , wherein the common electrodes of the row of subpixel units at the sub-region are spaced apart from each other, and each subpixel unit corresponds to one control TFT.
4. The display substrate according to claim 2 , wherein the at least one sub-region each comprises a plurality of rows of subpixel units.
5. The display substrate according to claim 4 , wherein the common electrodes of the subpixel units at the sub-region are coupled to each other.
6. The display substrate according to claim 1 , wherein each control TFT is created from a layer identical to the gate electrode of the switch TFT of each subpixel unit, an active layer of the control TFT is created from a layer identical to an active layer of the switch TFT, and the source electrode and the drain electrode of the control TFT are created from a layer identical to the source electrode and the drain electrode of the switch TFT.
7. A display device, comprising the display substrate according to claim 1 and a control module, wherein the control module is coupled to the common electrode voltage control lines and the common electrode voltage input lines, to apply a control voltage to the common electrode voltage control lines at different sub-regions and apply a common voltage to the common electrode voltage input lines at different sub-regions, and to provide an identical voltage difference between the common voltage applied to each common electrode and a voltage applied to each pixel electrode at different sub-regions.
8. The display device according to claim 7 , wherein the control module is further configured to apply an identical common voltage to the common electrode voltage input lines at different sub-regions.
9. The display device according to claim 8 , wherein the sub-regions each comprises at least one row of subpixel units; and
the control voltage applied by the control module to each common electrode voltage control line at each sub-region corresponding to the subpixel units in an odd-numbered row is different from the control voltage applied by the control module to each common electrode voltage control line at each sub-region corresponding to the subpixel units in an even-numbered row, to provide an identical voltage difference between the common voltage applied to each common electrode and the voltage applied to each pixel electrode at different sub-regions.
10. The display device according to claim 7 , wherein the common electrode voltage control lines of the sub-pixel units in the odd-numbered rows are coupled to each other and then to the control module, and the common electrode voltage control lines of the sub-pixel units in the even-numbered rows are coupled to each other and then to the control module.
11. The display device according to claim 7 , wherein each of the common electrode voltage control lines of the subpixel units in the odd-numbered rows is coupled to the control module, and each of the common electrode voltage control lines of the subpixel units in the even-numbered rows is coupled to the control module.
12. A method for driving the display device according to claim 7 , comprising:
applying a control voltage to each of the common electrode voltage control lines at different sub-regions and applying a common voltage to each of the common electrode voltage input lines at different sub-regions, to provide an identical voltage difference between the common voltage applied to each common electrode and a voltage applied to each pixel electrode at different sub-regions.
13. The method according to claim 12 , wherein the applying the control voltage to each of the common electrode voltage control lines at different sub-regions and applying the common voltage to each of the common electrode voltage input lines at different sub-regions comprises: applying an identical common voltage to the common electrode voltage input lines at different sub-regions.
14. The method according to claim 13 , wherein the sub-regions each comprises at least one row of subpixel units,
wherein the applying the control voltage to each of the common electrode voltage control lines at different sub-regions and applying the common voltage to each of the common electrode voltage input lines at different sub-regions comprises: applying the control voltage to each of the common electrode voltage control lines at the sub-regions corresponding to the subpixel units in odd-numbered rows, and applying the different control voltage to each of the common electrode voltage control lines at the sub-regions corresponding to the subpixel units in even-numbered rows, to provide an identical voltage difference between the common voltage applied to each common electrode and the voltage applied to each pixel electrode at different sub-regions.