Display device and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-2016204167-A1
Application number	US-201514877826-A
Country	US
Kind code	A1
Filing date	Oct 7, 2015
Priority date	Jan 9, 2015
Publication date	Jul 14, 2016
Grant date	—

Abstract

A display device includes a substrate; a plurality of color filters on the substrate, a common electrode covering the plurality of color filters, a white emission layer covering the common electrode, a plurality of pixel electrodes on the white emission layer and a plurality of pixel switching elements on the plurality of pixel electrodes and connected to the plurality of pixel electrodes, wherein the white emission layer includes a plurality of quantum dots.

First claim

What is claimed is:

1 . A display device comprising:
a substrate; a plurality of color filters on the substrate; a common electrode covering the plurality of color filters; a white emission layer covering the common electrode; a plurality of pixel electrodes on the white emission layer; and a plurality of pixel switching elements on the plurality of pixel electrodes and connected to the plurality of pixel electrodes, wherein the white emission layer comprises a plurality of quantum dots.

2 . The display device of claim 1 , wherein
the plurality of pixel switching elements comprises:
a first insulating layer covering the pixel electrode;
a gate electrode on the first insulating layer;
a second insulating layer covering the gate electrode;
a semiconductor on the second insulating layer and overlapping the gate electrode;
a third insulating layer covering the semiconductor; and
a source electrode and a drain electrode on the third insulating layer, and respectively connected to the semiconductor through a pair of contact holes at the third insulating layer,
wherein the drain electrode is connected to the pixel electrode.

3 . The display device of claim 2 , further comprising
a connecting member at a same layer as the gate electrode, wherein the connecting member connects the drain electrode and the pixel electrode to each other.

4 . The display. device of claim 3 , wherein
the connecting member is connected to the pixel electrode through a first connection hole at the first insulating layer, and is connected to the drain electrode through a second connection hole at the second insulating layer and the third insulating layer.

5 . The display device of claim 4 , further comprising:
a light blocking member between the plurality of color filters; and an auxiliary electrode on the light blocking member, wherein the auxiliary electrode is in contact with the common electrode.

6 . The display device of claim 4 , further comprising:
an encapsulation layer covering the plurality of pixel switching elements.

7 . The display device of claim 4 , further comprising:
an electron transporting layer and a hole transporting layer at respective sides of the white emission layer, wherein the electron transporting layer and the hole transporting layer comprise an inorganic layer.

8 . A method for manufacturing a display device, the comprising;
forming a plurality of color filters on a substrate; forming a common electrode covering the plurality of color filters; forming a white emission layer covering the common electrode; forming a plurality of pixel electrodes covering the white emission layer; and forming a plurality of pixel switching elements connected to the plurality of pixel electrodes on the plurality of pixel electrodes, wherein the white emission layer comprises a plurality of quantum dots.

9 . The method of claim 8 , wherein
the forming the pixel switching elements comprises:
forming a first insulating layer covering the plurality of pixel electrodes;
forming a gate electrode on the first insulating layer;
forming a second insulating layer covering the gate electrode;
forming a semiconductor overlapping the gate electrode on the second insulating layer;
forming a third insulating layer covering the semiconductor;
forming a pair of contact holes at the third insulating layer to expose the semiconductor; and
forming a source electrode and a drain electrode respectively connected to the semiconductor through the pair of contact holes at the third insulating layer,
wherein the drain electrode is connected to the pixel electrode.

10 . The method of claim 9 , further comprising:
forming a connecting member connecting the drain electrode and the pixel electrode, at the same layer as the gate electrode.

11 . The method of claim 10 , further comprising:
forming a first connection hole exposing a portion of the pixel electrode, in the first insulating layer, and wherein the forming the pair of contact holes at the third insulating layer comprises, forming a second connection hole exposing a portion of the connecting member, at the second insulating layer and the third insulating layer.

12 . The method of claim 11 , wherein
the connecting member is connected to the pixel electrode through the first connection hole, and is connected to the drain electrode through the second connection hole.

13 . The method of claim 8 , further comprising:
forming a light blocking member on the substrate; and forming an auxiliary electrode on the light blocking member.

14 . The method of claim 8 , further comprising:
forming an encapsulation layer covering a plurality of pixel switching elements.

Assignees

• Samsung Display Co Ltd

Inventors

• Jun Woo Sik

Classifications

• H10K59/80522

  combined with auxiliary electrodes · CPC title

• H01L27/3246

  Electricity · mapped topic

• H01L27/3213 Primary

  Electricity · mapped topic

• H01L51/56

  Electricity · mapped topic

• H01L27/322

  Electricity · mapped topic