Patent ID: 8188982

Claim:
A touch screen display apparatus comprising: a first substrate; a pixel electrode and a lower sensor electrode which are each disposed on the first substrate; a second substrate which faces the first substrate; a common electrode which is disposed on the second substrate and overlaps the pixel electrode; an upper sensor electrode which is disposed on the second substrate and faces the lower sensor electrode; a liquid crystal layer which comprises liquid crystal molecules interposed between the first substrate and the second substrate; a first alignment layer which is disposed on the pixel electrode and the common electrode; a second alignment layer which is disposed on the lower sensor electrode; and a third alignment layer which is disposed on the upper sensor electrode, wherein at least one of the second and third alignment layers aligns the liquid crystal molecules in a different direction from a direction in which the first alignment layer aligns the liquid crystal molecules, when touch pressure is applied onto a point on the first or second substrate, a distance between the lower sensor electrode and the upper sensor electrode at the point is changed, and a position of the point is detected by using a change in capacitance between the lower sensor electrode and the upper sensor electrode according to the change in the distance between the lower sensor electrode and the upper sensor electrode.