Liquid crystal display panel
View Patent ↗In a liquid crystal display panel, an array substrate includes a plurality of pixels that each having a switching device, a first pixel electrode, a coupling electrode, and a second pixel electrode. The switching device outputs a data voltage in response to a gate signal, and the first pixel electrode and the coupling electrode are connected to an output electrode of the switching device to receive the data voltage. The second pixel electrode faces the coupling electrode and receives a voltage lower than the data voltage. The resistance between the second pixel electrode and the coupling electrode is less than the resistance between the second pixel electrode and the common electrode.
1. A liquid crystal display panel, comprising:
an array substrate comprising a first base substrate and a plurality of pixels arranged on the first base substrate;
an opposite substrate comprising a second base substrate facing the first base substrate and a common electrode arranged on the second base substrate; and
a liquid crystal layer interposed between the array substrate and the opposite substrate and having a resistivity of 1×10 13 Ω·cm to 1×10 15 Ω·cm,
each pixel comprising:
a switching device to output a data voltage in response to a gate signal;
a first pixel electrode connected to an output electrode of the switching device to receive the data voltage;
a coupling electrode connected to the output electrode of the switching device to receive the data voltage;
a second pixel electrode facing the coupling electrode; and
an inter-insulating layer interposed between the coupling electrode and the second pixel electrode,
wherein the resistance between the coupling electrode and the second pixel electrode is less than the resistance between the second pixel electrode and the common electrode, and the liquid crystal layer has a resistivity larger than that of the inter-insulating layer for reduction in leakage current variations and preventing an afterimage.
2. The liquid crystal display panel of claim 1 , wherein the inter-insulating layer comprises a silicon nitride layer.
3. The liquid crystal display panel of claim 1 , wherein the resistance between the second pixel electrode and the coupling electrode decreases as the resistivity of the inter-insulating layer decreases.
4. The liquid crystal display panel of claim 3 , wherein the resistivity of the inter-insulating layer is equal to or smaller than 1×10 12 Ωcm.
5. The liquid crystal display panel of claim 1 , wherein the array substrate further comprises:
a plurality of gate lines; and
a plurality of data lines insulated from and crossing the gate lines to define a plurality of pixel areas, the pixels being respectively arranged in the pixel areas.
6. The liquid crystal display panel of claim 5 , wherein the inter-insulating layer is arranged on the first base substrate to cover the switching device, the gate lines, the data lines, and the coupling electrode, and the first pixel electrode and the second pixel electrode are arranged on the inter-insulating layer.
7. The liquid crystal display panel of claim 1 , wherein the first pixel electrode and the common electrode define a first liquid crystal capacitor in which a first pixel voltage is charged, and the second pixel electrode and the common electrode define a second liquid crystal capacitor in which a second pixel voltage is charged, the second pixel voltage having a lower voltage than that of the first pixel voltage.
8. The liquid crystal display panel of claim 7 , wherein the common electrode receives a common voltage, and polarities of the first pixel voltage and the second pixel voltage are inverted at every frame with respect to the common voltage.
9. The liquid crystal display panel of claim 8 , wherein the resistance between the second pixel electrode and the common electrode varies according to the polarity of the second pixel voltage with respect to the common voltage.