Samsung Display Co., Ltd.

Kangnam Kim

Beomjun Kim

Noboru Takeuchi

Duc-han Cho

Sung-Hoon Lim

Woogeun Lee

YoonHo Kim

Youmee Hyun

Kyu-Sik Cho

Jong-In Kim

Jonghwan Lee

Soojung Chae

Seokhwan Bang

Hongwoo Lee

Junhong Na

A gate driving circuit includes a plurality of unit stages connected to each other, wherein each of the plurality of unit stages includes a first transistor having a lower gate electrode, an upper gate electrode disposed on the lower gate electrode, an active layer disposed between the lower gate electrode and the upper gate electrode, a first electrode contacting a first portion of the active layer, and a second electrode contacting a second portion of the active layer, a first capacitor defined by a first region in which the lower gate electrode and the upper gate electrode overlap, and a second capacitor defined by a second region in which the upper gate electrode and the first electrode overlap, wherein the upper gate electrode and the lower gate electrode are electrically coupled to each other in the first region where the upper gate electrode and the lower gate electrode overlap to form the first capacitor.

Gate driving circuit and display device including the same

An organic light emitting diode display device includes a substrate, an active layer disposed on the substrate and including a metal oxide-based semiconductor, a gate electrode disposed on the active layer, an insulating layer disposed on the gate electrode, source and drain electrodes disposed on the insulating layer, a light emitting element on the source and drain electrodes, and a gate insulating layer between the active layer and the gate electrode. The gate insulating layer includes first and second gate insulating layers. The first gate insulating layer directly contacts the active layer and has a first amount of nitrogen. The second gate insulating layer is disposed on the first gate insulating layer and has a second amount of nitrogen that is different from the first amount of nitrogen.

Organic light emitting diode display device and method of manufacturing organic light emitting diode display device

A display device with space for accommodating elements of a gate driver in a display area of the display device, the display device including first and second adjacent pixel electrodes, and third and fourth adjacent pixel electrodes; a gate line extending between the first pixel electrode and the second pixel electrode and between the third pixel electrode and the fourth pixel electrode; a gate driver having a plurality of elements and configured to drive the gate line; and a light blocking layer overlapping the gate line, wherein the light blocking layer comprises a first light blocking portion and a second light blocking portion, the first light blocking portion is adjacent to the first pixel electrode and the second pixel electrode, the second light blocking portion is adjacent to the third pixel electrode and the fourth pixel electrode, the second light blocking portion having a larger size than a size of the first light blocking portion, and at least one of the plurality of elements of the gate driver overlaps the second light blocking portion.

Display device

A gate driving circuit includes driving stages. Each of the driving stages applies each of gate signals to each of gate lines of a display panel. A k-th (k is a natural number equal to or greater than 2) driving stage includes a first output transistor, a capacitor, and first and second control transistor. The first output transistor includes a control electrode connected to a first node, an input electrode receiving a clock signal, and an output electrode outputting a k-th gate signal. The capacitor is connected between the output electrode of the first output transistor and the control electrode of the first output transistor. The first control transistor applies a first control signal to a second node to control a voltage of the first node before the k-th gate signal is output. The second control transistor is diode-connected between the second node and the first node.

Gate driving circuit and a display device including the gate driving circuit

An n-th driving stage of a gate driving circuit includes a first control transistor being configured to increase a voltage of a first node to a first voltage, a control capacitor having one end connected to the first node, a second control transistor being configured to increase the first voltage of the first node to a second voltage that is higher than the first voltage, a third control transistor being configured to increase a voltage of a second node to a third voltage when being turned on according to the voltage applied to the first node, and an output transistor being configured to output a gate signal of the n-th driving stage when being turned on according to the voltage applied to the second node.

Growing community of inventors

Asan-si, South Korea

Kangnam Kim