Method of driving a liquid crystal display apparatus, array substrate for performing the method, method of manufacturing the array substrate, and a liquid crystal display apparatus having the array substrate
View Patent ↗In a method of driving a liquid crystal display (“LCD”) apparatus, a common voltage is applied to a common electrode above a liquid crystal layer and pixel voltages are applied to pixel electrodes under the liquid crystal layer to form an electrical field with the common electrode to control movements of liquid crystal molecules of the liquid crystal layer. Each of the pixel electrodes has slits. Then, a supplementary voltage is applied to a supplementary electrode between the slits of each pixel electrode to compensate the electric field formed by the pixel electrodes and the common electrode.
1. An array substrate comprising:
a substrate having a gate line, a data line and a switching element electrically connected to the gate line and the data line;
a pixel electrode disposed in a pixel area of the substrate and electrically connected to the switching element, the pixel electrode including a connection part dividing the pixel area into a plurality of domains and slits extending from the connection part;
a supplementary electrode corresponding to at least a space between the slits of the pixel electrode; and
a first insulation layer formed on the data line and the switching element and a second insulation layer formed on the first insulation layer,
wherein the supplementary electrode is formed above the first insulation layer and the pixel electrode is formed on the second insulation layer, the supplementary electrode being electrically disconnected from the first insulation layer.
2. The array substrate of claim 1 , further comprising an organic insulation layer formed between the first insulation layer and the second insulation layer,
wherein the supplementary electrode is formed between the organic insulation layer and the second insulation layer.
3. The array substrate of claim 1 , wherein the supplementary electrode is formed in the pixel area and has a plate shape.
4. The array substrate of claim 1 , wherein the supplementary electrode extends along a portion of a side portion of the pixel area along which end portions of the slits are arranged.
5. An LCD apparatus, comprising:
a first substrate including an upper substrate and a common electrode on an under surface of the upper substrate;
a liquid crystal layer under the common electrode; and
a second substrate including a lower substrate opposite to the upper substrate, the lower substrate having a gate line, a data line and a switching element electrically connected to the gate line and the data line, the liquid crystal layer being interposed between the upper substrate and the lower substrate, a pixel electrode in a pixel area of the lower substrate, the pixel electrode including a connection part dividing the pixel area into a plurality of domains and slits extending from the connection part, and a supplementary electrode corresponding to at least a space between the slits and applying an electric field to a portion of the liquid crystal layer in the space between the slits, wherein the second substrate further comprises:
a first insulation layer formed between the switching element and the supplementary electrode, the supplementary electrode being electrically disconnected from the first insulation layer; and
a second insulation layer formed between the supplementary electrode and the pixel electrode.
6. The LCD apparatus of claim 5 , wherein the supplementary electrode is formed in the pixel area and has a plate shape.
7. The LCD apparatus of claim 5 , further comprising a driver applying a pixel voltage to the pixel electrode and a supplementary voltage to the supplementary electrode, the supplementary voltage forming the electric field applied to the portion of the liquid crystal layer in the space between the slits.
8. The LCD apparatus of claim 7 , wherein the driver applies pixel voltages which have opposite phases to each other to adjacent pixel electrodes, respectively, and applies supplementary voltages having phases which are the same as the pixel voltages to corresponding supplementary electrodes.
9. The LCD apparatus of claim 7 , wherein the driver applies pixel voltages which have a same phase to adjacent pixel electrodes, respectively, and applies supplementary voltages having opposite phases to each other to corresponding supplementary electrodes to the adjacent pixel electrodes.