Transparent display apparatus

Patent metadata

Field	Value
Publication number	US-2017005155-A1
Application number	US-201615053918-A
Country	US
Kind code	A1
Filing date	Feb 25, 2016
Priority date	Jul 3, 2015
Publication date	Jan 5, 2017
Grant date	—

Abstract

A display apparatus includes a pixel having a first area emitting light and a second area transmitting light. A pixel circuit unit is in the first area and includes a thin film transistor. An inorganic insulation layer is in the second area. A first insulation layer covers the pixel circuit unit in the first area, and has an opening exposing the inorganic insulation layer in the second area. A first electrode is on the first insulation layer in the first area. The first electrode is electrically connected to the pixel circuit unit. A second insulation layer covers edges of the first electrode and is outside the opening formed in the first insulation layer. A second electrode is in the first area. An intermediate layer, including an emissive layer, is between the first electrode and the second electrode.

First claim

What is claimed is:

1 . A display apparatus comprising:
a pixel including a first area, from which light is emitted, and a second area, through which ambient light is transmitted; a pixel circuit unit disposed in the first area of the pixel and including at least one thin film transistor; an inorganic insulation layer disposed in the second area of the pixel; a first insulation layer covering the pixel circuit unit in the first area, and having an opening exposing at least a portion of the inorganic insulation layer in the second area; a first electrode disposed on the first insulation layer in the first area, wherein the first electrode is electrically connected to the pixel circuit unit; a second insulation layer covering one or more edges of the first electrode, and the second insulation layer being disposed outside of the opening formed in the first insulation layer; a second electrode disposed in the first area; and an intermediate layer disposed between the first electrode and the second electrode, the intermediate layer including an emissive layer.

2 . The display apparatus of claim 1 , wherein the first insulation layer comprises an organic insulation layer.

3 . The display apparatus of claim 1 , wherein the second insulation layer comprises an organic insulation layer.

4 . The display apparatus of claim 1 , wherein the second insulation layer has a shape of a closed loop as it covers the one or more edges of the first electrode.

5 . The display apparatus of claim 1 , wherein a concave or convex pattern is formed on an upper surface of the first insulation layer.

6 . The display apparatus of claim 1 , wherein at least a portion of the pixel circuit unit overlaps the first electrode.

7 . The display apparatus of claim 1 , wherein the inorganic insulation layer has a single layer structure or a double layer structure and the inorganic insulation layer includes silicon dioxide (SiO 2 ) and/or silicon nitride (SiN x ).

8 . The display apparatus of claim 1 , wherein the thin film transistor comprises:
an active layer; a gate electrode disposed on the active layer and insulated from the active layer; a third insulation layer disposed between the active layer and the gate electrode; a plurality of fourth insulation layers disposed on the gate electrode; a source electrode disposed on the plurality of fourth insulation layers and electrically connected to the active layer; and a drain electrode disposed on the plurality of fourth insulation layers and electrically connected to the active layer.

9 . The display apparatus of claim 8 , wherein each of the source electrode and the drain electrode comprise:
a bottom electrode, comprising a first conductive material; and a top electrode, comprising a second conductive material.

10 . The display apparatus of claim 9 , wherein the second conductive material comprises a transparent conductive material.

11 . The display apparatus of claim 8 , wherein the third insulation layer and the inorganic insulation layer comprises a same material.

12 . The display apparatus of claim 8 , further comprising a capacitor including:
a first capacitor electrode disposed on a same layer as the gate electrode; a second capacitor electrode disposed between the insulation layers of the plurality of fourth insulation layers; and a third capacitor electrode disposed on a same layer as the source electrode and the drain electrode.

13 . The display apparatus of claim 1 , further comprising a transparent conductive layer disposed on at least a portion of the inorganic insulation layer.

14 . The display apparatus of claim 13 , wherein the first insulation layer covers at least a portion of the transparent conductive layer.

15 . The display apparatus of claim 13 , wherein the transparent conductive layer covers an entirety of an upper surface of the inorganic insulation layer.

16 . The display apparatus of claim 13 , wherein the thin film transistor comprises:
an active layer; a gate electrode disposed on the active layer and insulated from the active layer; a third insulation layer disposed between the active layer and the gate electrode; a plurality of fourth insulation layers disposed on the gate electrode; a source electrode disposed on the plurality of fourth insulation layers and electrically connected to the active layer; and a drain electrode disposed on the plurality of fourth insulation layers and electrically connected to the active layer.

17 . The display apparatus of claim 16 , further comprising a capacitor including:
a first capacitor electrode disposed on a same layer as the gate electrode; a second capacitor electrode disposed between insulation layers of the plurality of fourth insulation layers; and a third capacitor electrode disposed on a same layer as the source electrode and the drain electrode.

18 . The display apparatus of claim 17 , wherein each of the gate electrode and the first capacitor electrode comprises:
a bottom electrode, comprising a first conductive material; and a top electrode, comprising a second conductive material.

19 . The display apparatus of claim 18 , wherein the first conductive material and the transparent conductive layer comprise a same material.

20 . The display apparatus of claim 16 , wherein the third insulation layer comprises a same material as the inorganic insulation layer.

21 . A method for manufacturing a display apparatus, comprising:
disposing a buffer layer on a substrate; forming a semiconductor layer on the buffer layer, over a first area of the substrate; forming a first insulation layer on the buffer layer and the semiconductor layer; forming a first conductive layer over the first insulation layer; patterning the first conductive layer to form: a gate electrode of a thin film transistor (TFT) over the first area of the substrate; and a first capacitor electrode of a capacitor over the first area of the substrate; doping the semiconductor layer, using the gate electrode as a mask, to dope B or P ion impurities into a source and drain area of the semiconductor layer, leaving an un-doped region of the semiconductor layer, between the source and drain areas, as a channel area; forming a second insulation layer over the patterned first conductive layer; forming a second conductive layer on the second insulation layer; patterning the second conductive layer to form a second capacitor electrode of the capacitor over the first area; forming a third insulation layer over the second capacitor electrode and the second insulation layer; patterning the third insulation layer together with the first and second insulation layers to expose a part of the first insulation layer of a second area of the substrate to form an inorganic insulation layer and to form contact holes that expose portions of the source and drain areas; forming a third conductive layer and a fourth conductive layer over the third insulation layer; patterning the third and fourth conductive layers, simultaneously, to form a source electrode in contact with the source area, a drain electrode in contact with the drain area, to form a third capacitor electrode of the capacitor, and to form a pad electrode over a pad area of the substrate; forming a fourth insulation layer over the third, fourth patterned conductive layers and the inorganic insulation layer; patterning the fourth insulation layer to expose the source electrode or the drain electrode, the pad e

Assignees

• Samsung Display Co Ltd

Inventors

• You Chungi
• Lee Gwanggeun

Classifications

• H10P50/283

  by chemical means · CPC title

• H10P50/264

  by chemical means · CPC title

• H10W74/01 Primary

  Manufacture or treatment · CPC title

• H10D30/0321

  comprising silicon, e.g. amorphous silicon or polysilicon · CPC title

• H10D62/834

  further characterised by the dopants · CPC title