US 9,431,502 B2Granted

Display panel and display apparatus having the same

AssigneeSamsung Display Co., Ltd.

InventorsValeriy Prushinskiy, Min-Soo Kim

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Abstract

A display panel includes a substrate, an active layer, a gate insulating layer, a gate electrode structure, an insulating interlayer, a switching element, and a planarization insulating layer. The active layer includes a source region and a drain region, and is disposed on the substrate. The gate insulating layer is disposed on the active layer. The gate electrode structure includes a plurality of gate electrode layer which are at least partially overlapped with each other. The gate electrode structure is disposed on the gate insulating layer. The insulating interlayer covers the gate electrode structure. The switching element includes a source electrode and a drain electrode, and the source electrode and the drain electrode are in contact with the source region and the drain region, respectively. The planarization insulating layer covers the switching element.

Claims23

Dependent claims

A display panel, comprising:

a switching element including:
a flexible substrate;
an active layer including a source region and a drain region, wherein the active layer is disposed on the substrate;
a gate insulating layer disposed on the active layer;
a gate electrode structure including a plurality of gate electrode layers only partially overlapped with each other, wherein the gate electrode structure is disposed on the gate insulating layer;
an insulating interlayer covering the gate electrode structure;
and
a source electrode and a drain electrode, wherein the source electrode is in contact with the source region, and wherein the drain electrode is in contact with the drain region;
and
a planarization insulating layer covering the switching element,
wherein the gate electrode structure comprises a first gate electrode layer and a second gate electrode layer that is in direct contact with the first gate electrode layer, and
wherein the second gate electrode layer is disposed on the first gate electrode layer, and the second gate electrode layer partially exposes the first gate electrode layer.

9 more elements

A display apparatus, comprising:

a switching element comprising a flexible substrate, an active layer disposed on the flexible substrate, a gate insulating layer disposed on the active layer, a gate electrode structure having a plurality of gate electrode layers partially overlapped with each other on the gate insulating layer, an insulating interlayer covering the gate electrode structure, and source and drain electrodes on the insulating interlayer;
a planarization insulating layer covering the switching element;
a first electrode disposed on the insulating interlayer;
an emitting structure disposed on the first electrode;
and
a second electrode disposed on the emitting structure,
wherein the gate electrode structure comprises a first gate electrode layer and a second gate electrode layer that is in direct contact with the first gate electrode layer, and
wherein the second gate electrode layer is disposed on the first gate electrode layer and wherein the second gate electrode layer partially exposes the first gate electrode layer.

5 more elements

A display apparatus comprising:

a first substrate formed of a rigid material;
an insulating layer disposed on the first substrate;
and
a switching element disposed on the insulating layer, wherein the switching element comprises:
a flexible substrate, an active layer including a source region and a drain region, wherein the active layer is disposed on the flexible substrate, a gate insulating layer disposed on the active layer;
a gate electrode structure including a plurality of gate electrode layers partially overlapped with each other on the gate insulating layer, an insulating interlayer covering the gate electrode structure, and a source electrode and a drain electrode each disposed on the insulating interlayer, wherein the source electrode and the drain electrode each penetrate the insulating interlayer and the gate insulating layer thereby contacting with the source region of the active layer and the drain region of the active layer, respectively;
a planarization insulating layer disposed on the insulating interlayer, the source electrode and the drain electrode, wherein the planarization insulating layer includes a contact hole exposing the drain electrode;
a first electrode disposed the planarization insulating layer, wherein the first electrode is electrically connected to the drain electrode through the contact hole in the planarization insulating layer;
a pixel definition layer disposed on the planarization insulating layer and partially covering the first electrode;
an organic layer disposed on the first electrode;
and
a second electrode covering the organic layer and the pixel definition layer,
wherein the gate electrode structure comprises a first gate electrode layer and a second gate electrode layer that is in direct contact with the first gate electrode layer, and
wherein the second gate electrode layer is disposed on the first gate electrode layer and wherein the second gate electrode layer partially exposes the first gate electrode layer.

11 more elements

Dependencies are inferred from the claim text.