Patent ID: 8957846
Filing Date: 2015-02-17
Classification: G06F

Abstract:
1. A touch display having in-plane-switching liquid crystal structure, which includes a pixel cell and a multiplexer circuit for providing a display function and a touch detection function, wherein said pixel cell comprises: a first substrate; a counter electrode located on said first substrate; a storage capacitor bottom electrode located on said first substrate and separated from said counter electrode; a storage capacitor connection line coupled electrically with said storage capacitor bottom electrode; a counter electrode connection line coupled electrically with said counter electrode; an insulation layer having a first surface and a second surface, the first and second surfaces being on opposite sides of the insulation layer, the first surface being in direct contact with said counter electrode and with said storage capacitor bottom electrode; a thin film transistor located on the second surface of said insulation layer and having a gate, a source, and a drain; a pixel electrode located on said second surface of said insulation layer and coupled electrically with said drain; a storage capacitor top electrode located on said second surface of said insulation layer and being directly coupled electrically with said pixel electrode; a gate connection line coupled electrically with said gate; a source connection line coupled electrically with said source; and a liquid crystal layer located on said thin film transistor, on said pixel electrode, and on said storage capacitor top electrode; and said multiplexer circuit comprises: a first multiplexer having a first contact, a second contact, and a third contact, wherein, said first contact is coupled with said source connection line, said second contact is coupled with a source driver unit, said third contact is coupled with a touch control unit, said first contact is coupled electrically with said second contact during a display period, and said first contact is coupled electrically with said third contact during a touch detection period; a second multiplexer having a fourth contact, a fifth contact, and a sixth contact, wherein, said fourth contact is coupled with said storage capacitor connection line, said fifth contact is coupled with a common voltage, said sixth contact is coupled with said touch control unit, said fourth contact is coupled electrically with said fifth contact during said display period, and said fourth contact is coupled electrically with said sixth contact during said touch detection period; and a third multiplexer having a seventh contact, an eighth contact, and a ninth contact, wherein, said seventh contact is coupled with said counter electrode, said eighth contact is coupled with said common voltage, said ninth contact is coupled with said touch control unit, said seventh contact is coupled electrically with said eighth contact during said display period, and said seventh contact is coupled electrically with said ninth contact during said touch detection period.