Patent ID: 8508700
Filing Date: 2013-08-13
Classification: G02F,H01L

Abstract:
1. A liquid crystal display device comprising: a thin film transistor comprising: a gate electrode; a semiconductor layer comprising polycrystalline silicon; a gate insulating layer separating the gate electrode and the semiconductor layer; a first insulating layer over the thin film transistor; a first conductive layer over the first insulating layer and in direct contact with the semiconductor layer through an opening in the first insulating layer; a second insulating layer over the first conductive layer; a common electrode over the second insulating layer; a third insulating layer over the common electrode; and a pixel electrode over the third insulating layer, wherein the pixel electrode is in electrical contact with the first conductive layer through an opening in the third insulating layer and a first opening in the second insulating layer; wherein the common electrode is in electrical contact with a second conductive layer made from a same film as the first conductive layer through a second opening in the second insulating layer; wherein the second conductive layer is in electrical contact with a third conductive layer made of the same film as the gate electrode through an opening in the first insulating layer; and wherein the common electrode substantially overlaps with the pixel electrode in an optically active region of a pixel; wherein the opening in the third insulating layer and the first opening in the second insulating layer overlap each other at least partially; wherein the opening in the first insulating layer and the second opening in the second insulating layer do not overlap each other.