Organic light emitting display

Patent metadata

Field	Value
Publication number	US-9449553-B2
Application number	US-201414221092-A
Country	US
Kind code	B2
Filing date	Mar 20, 2014
Priority date	May 12, 2005
Publication date	Sep 20, 2016
Grant date	Sep 20, 2016

Abstract

An organic light emitting display (OLED) is disclosed. The OLED includes a storage capacitor formed in a first region of the substrate, a thin film transistor formed in a second region of the substrate, a first data line capacitor formed in a third region of the substrate, an organic light emitting diode formed on the storage capacitor and the thin film transistor, and a second data line capacitor formed on the data line capacitor.

First claim

What is claimed is:

1. An organic light emitting display (OLED) comprising:
a substrate;
a storage capacitor region, a thin film transistor region, and a data line capacitor region each formed on the substrate;
a storage capacitor formed in the storage capacitor region, the storage capacitor comprising:
a first semiconductor layer formed on the substrate;
a gate insulating layer formed on the first semiconductor layer;
a first electrode formed on the gate insulating layer;
an interlayer insulating layer formed on the first electrode; and
a second electrode formed on the interlayer insulating layer, wherein the second electrode is electrically connected to the first semiconductor layer;

a thin film transistor formed in the thin film transistor region, the thin film transistor comprising:
a second semiconductor layer formed on the substrate;
a gate insulating layer formed on the second semiconductor layer;
a gate electrode formed on the gate insulating layer;
a source electrode formed on the gate insulating layer; and
a drain electrode formed on the gate insulating layer;

a first data line capacitor formed in the data line capacitor region, the first data line capacitor comprising:
a third semiconductor layer formed on the substrate;
a gate insulating layer formed on the third semiconductor layer;
an interlayer insulating layer formed on the gate insulating layer; and
a data line formed on the interlayer insulating layer not electrically coupled to the third semiconductor layer;

an organic light emitting diode formed on the storage capacitor and the thin film transistor and comprising:
a pixel electrode connected to one of the source and drain electrodes;
an organic emission layer formed on the pixel electrode; and
an opposite electrode formed on the storage capacitor, the thin film transistor, and the first data line capacitor; and

a second data line capacitor formed on the first data line capacitor, the second data line capacitor comprising:
the data line;
an insulating layer formed over the data line; and
the pixel electrode not electrically coupled to the data line.

2. The OLED according to claim 1 , wherein the insulating layer of the second data line capacitor comprises a passivation layer comprising at least one of a silicon oxide (SiO 2 ) layer, a silicon nitride (SiN X ) layer, and a multi-layer thereof.

3. The OLED according to claim 1 , wherein a third data line capacitor comprises the first and second data line capacitors.

4. The OLED according to claim 1 , wherein the insulating layer of the second data line capacitor comprises a planarization layer, comprising at least one of a benzocyclobutene (BCB) layer, a polyimide layer, and a polyacryl layer.

5. The OLED according to claim 4 , wherein a third data line capacitor comprises the first and second data line capacitors.

6. The OLED according to claim 5 , wherein the third data line capacitor has a larger capacitance than the storage capacitor.

7. The OLED according to claim 6 , wherein the third data line capacitor has a capacitance of about 20 pF to about 50 pF.

8. The OLED according to claim 7 , wherein the capacitance of the third data line capacitor depends at least in part on at least one of the size of a contact hole, the size of a via hole, and the thickness of at least one of the passivation layer, the planarization layer, and the pixel defining layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Kwak Won-Kyu
• Kim Yang-Wan

Classifications

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• G09G2300/0819

  used for counteracting undesired variations, e.g. feedback or autozeroing · CPC title

• G09G2300/0852

  being a dynamic memory with more than one capacitor · CPC title

• H01L51/5218

  Electricity · mapped topic

• G09G2300/0842

  forming a memory circuit, e.g. a dynamic memory with one capacitor · CPC title