Display apparatus
View Patent ↗A display apparatus includes a plurality of pixels. Each pixel includes a first sub-pixel that is charged with a data signal corresponding to an input gray-scale, in response to a gate signal, and a second sub-pixel that is charged with the data signal in response to the gate signal. A boost capacitor is disposed between the first and second sub-pixels. The boost capacitor increases the voltage of the signal charged in the first sub-pixel and decreases the voltage of the signal charged in the second sub-pixel. Each pixel further includes an initializing device to initialize a first electrode of the boost capacitor and a switching device to change an electric potential of the first electrode of the boost capacitor.
1. A display apparatus comprising:
gate lines configured to receive a gate signal;
data lines configured to receive a data signal; and
pixels, each pixel comprising:
a pixel electrode comprising a first sub-pixel electrode and a second sub-pixel electrode;
a first switching device connected to at least one of the gate lines, at least one of the data lines, and the first sub-pixel electrode;
a second switching device connected to the at least one of the gate lines, the at least one of the data lines, and the second sub-pixel electrode;
a boost capacitor connected to the first sub-pixel electrode;
a third switching device connected to the at least one of the gate lines, the boost capacitor, and a storage voltage line; and
a fourth switching device comprising a gate electrode in a floating state and not connected to the gate lines, the fourth switching device connected to the second sub-pixel electrode and the boost capacitor,
wherein a driving current of the first and third switching devices is greater than a leakage current of the fourth switching device.
2. The display apparatus of claim 1 , wherein:
the first switching device comprises:
a gate electrode connected to the at least one of the gate lines;
a source electrode connected to the at least one of the data lines; and
a drain electrode connected to the first sub-pixel electrode; and
the second switching device comprises:
a gate electrode connected to the at least one of the gate lines;
a source electrode connected to the at least one of the data lines; and
a drain electrode connected to the second sub-pixel electrode.
3. The display apparatus of claim 1 , wherein each of the pixels further comprises a storage voltage line to receive a storage voltage.
4. The display apparatus of claim 3 , wherein the third switching device comprises:
a gate electrode connected to the at least one of the gate lines;
a source electrode connected to the boost capacitor; and
a drain electrode connected to the storage voltage line.
5. The display apparatus of claim 3 , wherein each of the pixels further comprises a coupling capacitor connected to the gate electrode of the fourth switching device and the storage voltage line.
6. The display apparatus of claim 1 , wherein the fourth switching device further comprises:
a source electrode connected to the second sub-pixel electrode; and
a drain electrode connected to the boost capacitor.
7. The display apparatus of claim 6 , wherein the boost capacitor comprises:
a first electrode extending from the drain electrode of the fourth switching device;
a second electrode extending from the first sub-pixel electrode; and
a dielectric layer disposed between the first electrode and the second electrode.
8. The display apparatus of claim 1 , further comprising:
a common electrode facing the first and second sub-pixel electrodes; and
a liquid crystal layer disposed between the common electrode and the first and second sub-pixel electrodes.
9. The display apparatus of claim 1 , wherein the boost capacitor increases a grayscale level of the first sub-pixel electrode and decreases a grayscale level of the second sub-pixel electrode.