Organic light emitting diode display

Patent metadata

Field	Value
Publication number	US-9786224-B2
Application number	US-201514702602-A
Country	US
Kind code	B2
Filing date	May 1, 2015
Priority date	Nov 10, 2014
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

An organic light emitting diode display includes: a substrate; a scan line, a first emission control line, and a second emission control line on the substrate; a data line and a driving voltage line crossing the scan line; a switching transistor connected to the scan line and the data line and including a switching drain electrode; a driving transistor including a driving source electrode connected to the switching drain electrode; an organic light emitting diode electrically connected to a driving drain electrode of the driving transistor; an operation control transistor to transmit a driving voltage to the driving transistor; and a first emission control transistor and second emission control transistor to transmit the driving voltage from the driving transistor to the organic light emitting diode, wherein the first emission control line and the second emission control line partially overlap each other.

First claim

What is claimed is:

1. An organic light emitting diode display comprising:
a substrate;
a scan line, a first emission control line, and a second emission control line on the substrate and respectively configured to transmit a scan signal, a first emission control signal, and a second emission control signal;
a data line and a driving voltage line crossing the scan line, the data line and the driving voltage line being respectively configured to transmit a data voltage and a driving voltage;
a switching transistor connected to the scan line and the data line and comprising a switching drain electrode configured to output the data voltage;
a driving transistor comprising a driving source electrode connected to the switching drain electrode;
an organic light emitting diode electrically connected to a driving drain electrode of the driving transistor;
an operation control transistor configured to be turned on by the first emission control signal and to transmit the driving voltage to the driving transistor; and
a first emission control transistor and a second emission control transistor respectively configured to be turned on by the first emission control signal and the second emission control signal, and to transmit the driving voltage from the driving transistor to the organic light emitting diode,
wherein the first emission control line and the second emission control line partially overlap each other.

2. The organic light emitting diode display of claim 1 , wherein
the second emission control line is between the first emission control line and the organic light emitting diode.

3. The organic light emitting diode display of claim 2 , wherein
the second emission control transistor is configured to receive the second emission control signal having a high level through the second emission control line during an initialization period in which the driving transistor is initialized to turn off the second emission control transistor.

4. The organic light emitting diode display of claim 1 , further comprising
a storage capacitor comprising a first storage electrode connected to a driving gate electrode of the driving transistor, and a second storage electrode connected to the driving voltage line,
wherein the first emission control line is at a same layer as the first storage electrode.

5. The organic light emitting diode display of claim 4 , wherein
the second emission control line is at a same layer as the scan line.

6. The organic light emitting diode display of claim 4 , wherein
the second storage electrode and the driving gate electrode are at a same layer as the scan line.

7. The organic light emitting diode display of claim 1 , wherein
a first emission control gate electrode of the first emission control transistor and a second emission control gate electrode of the second emission control transistor partially overlap each other.

8. An organic light emitting diode display comprising:
a substrate;
a scan line and an emission control line on the substrate and respectively configured to transmit a scan signal and an emission control signal;
a data line and a driving voltage line crossing the scan line, the data line and the driving voltage line being respectively configured to transmit a data voltage and a driving voltage;
a switching transistor connected to the scan line and the data line and comprising a switching drain electrode configured to output the data voltage;
a driving transistor comprising a driving source electrode connected to the switching drain electrode;
an organic light emitting diode electrically connected to a driving drain electrode of the driving transistor;
an operation control transistor configured to be turned on by the emission control signal and to transmit the driving voltage to the driving transistor;
an emission control transistor configured to be turned on by the emission control signal and to transmit the driving voltage from the driving transistor to the organic light emitting diode; and
a holding electrode line including a holding electrode overlapping the driving source electrode and the driving drain electrode,
wherein the driving source electrode, the driving drain electrode, and the holding electrode, form a holding capacitor.

9. The organic light emitting diode display of claim 8 , wherein
the holding electrode line is connected to the emission control line.

10. The organic light emitting diode display of claim 8 , further comprising:
a storage capacitor comprising a first storage electrode connected to a driving gate electrode of the driving transistor, and a second storage electrode connected to the driving voltage line,
wherein the emission control line is at a same layer as the first storage electrode.

11. The organic light emitting diode display of claim 10 , wherein
the holding electrode line is at a same layer as the second storage electrode.

12. The organic light emitting diode display of claim 11 , wherein
the driving gate electrode is at a same layer as the emission control line.

13. The organic light emitting diode display of claim 8 , wherein
the holding electrode includes a first holding electrode overlapping the driving source electrode and a second holding electrode overlapping the driving drain electrode,
wherein the holding capacitor comprises a first holding capacitor between the driving source electrode and the first holding electrode, and a second holding capacitor between the driving drain electrode and the second holding electrode.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Chang-Yeop
• Kim Ji Hye

Classifications

• G09G2300/0819

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

• G09G3/3258 Primary

  with pixel circuitry controlling the voltage across the light-emitting element · CPC title

• G09G2300/0404

  Matrix technologies · CPC title

• G09G2310/0216

  Interleaved control phases for different scan lines in the same sub-field, e.g. initialization, addressing and sustaining in plasma displays that are not simultaneous for all scan lines · CPC title

• G09G2310/0251

  Precharge or discharge of pixel before applying new pixel voltage · CPC title