Display panel of an organic light emitting diode display device having a pentile pixel structure

Patent metadata

Field	Value
Publication number	US-10706771-B2
Application number	US-201916290970-A
Country	US
Kind code	B2
Filing date	Mar 4, 2019
Priority date	Mar 6, 2018
Publication date	Jul 7, 2020
Grant date	Jul 7, 2020

Abstract

A display panel of an OLED display device includes a first OLED disposed in a first sub-pixel region, a second OLED disposed in a second sub-pixel region adjacent to the first sub-pixel region in a row direction, a third OLED disposed in a third sub-pixel region adjacent to the first sub-pixel region in a column direction, a fourth OLED disposed in a fourth sub-pixel region adjacent to the second sub-pixel region in the column direction and adjacent to the third sub-pixel region in the row direction, a first sub-pixel circuit disposed in the first sub-pixel region and a fourth sub-pixel circuit disposed in the fourth sub-pixel region, both configured to drive the first OLED, a second sub-pixel circuit disposed in the second sub-pixel region, and configured to drive the fourth OLED, a third sub-pixel circuit disposed in the third sub-pixel region, and configured to drive the third OLED.

First claim

What is claimed is:

1. A display panel of an organic light emitting diode (OLED) display device, the display panel comprising:
a first OLED disposed in a first sub-pixel region, and configured to emit light of a first color;
a second OLED disposed in a second sub-pixel region adjacent to the first sub-pixel region in a row direction, and configured to emit light of a second color;
a third OLED disposed in a third sub-pixel region adjacent to the first sub-pixel region in a column direction, and configured to emit light of a third color;
a fourth OLED disposed in a fourth sub-pixel region adjacent to the second sub-pixel region in the column direction and adjacent to the third sub-pixel region in the row direction, and configured to emit light of the first color;
a first sub-pixel circuit disposed in the first sub-pixel region, and configured to drive the first OLED in the first sub-pixel region;
a second sub-pixel circuit disposed in the second sub-pixel region, and configured to drive the fourth OLED in the fourth sub-pixel region;
a third sub-pixel circuit disposed in the third sub-pixel region, and configured to drive the third OLED in the third sub-pixel region; and
a fourth sub-pixel circuit disposed in the fourth sub-pixel region, and configured to drive the second OLED in the second sub-pixel region.

2. The display panel of claim 1 , wherein the first and second sub-pixel circuits receive a first emission control signal having substantially the same value through a first emission control line, and
wherein the third and fourth sub-pixel circuits receive a second emission control signal having substantially the same value through a second emission control line.

3. The display panel of claim 2 , wherein a first off period ratio of the first emission control signal applied to the first and second sub-pixel circuits is greater than a second off period ratio of the second emission control applied to the third and fourth sub-pixel circuits.

4. The display panel of claim 3 , wherein the first and second sub-pixel circuits drive the first and fourth OLEDs to emit the light of the first color with the first off period ratio that is increased compared to the second off period ratio for the second and third OLEDs.

5. The display panel of claim 4 , wherein the first and second sub-pixel circuits provide the first and fourth OLEDs with a driving current corresponding to the increased first off period ratio, the driving current being provided to the first and fourth OLEDs being greater than driving current provided to the second and third OLEDs.

6. The display panel of claim 2 , wherein a first off period ratio of the first emission control signal applied to the first and second sub-pixel circuits is different from a second off period ratio of the second emission control applied to the third and fourth sub-pixel circuits.

7. The display panel of claim 1 , wherein the first and second sub-pixel circuits each receives a first scan signal having substantially the same value through a first scan line, and
wherein the third and fourth sub-pixel circuits each receives a second scan signal having substantially the same value through a second scan line.

8. The display panel of claim 7 , wherein a first SOT of the first scan signal applied to the first and second sub-pixel circuits is longer than a second SOT of the second scan signal applied to the third and fourth sub-pixel circuits.

9. The display panel of claim 8 , wherein the first and second sub-pixel circuits further comprise first driving transistors, the third and fourth sub-pixel circuits further comprise second driving transistors, a first threshold voltage compensation time for the first driving transistors is longer than a second threshold voltage compensation time for the second driving transistors.

10. The display panel of claim 7 , wherein a first scan on time (SOT) of the first scan signal applied to the first and second sub-pixel circuits is different from a second SOT of the second scan signal applied to the third and fourth sub-pixel circuits.

11. The display panel of claim 1 , wherein the first and fourth OLEDs are green OLEDs configured to emit green light, the second OLED is a red OLED configured to emit red light, and the third OLED is a blue OLED configured to emit blue light.

12. The display panel of claim 1 , wherein the second OLED in the second sub-pixel region includes an anode extension portion connected to the fourth sub-pixel circuit, and
wherein the fourth OLED in the fourth sub-pixel region includes another anode extension portion connected to the second sub-pixel circuit.

13. An organic light emitting diode (OLED) display device, comprising:
a display panel;
a data driver configured to provide data signals to the display panel;
a scan driver configured to provide scan signals to the display panel;
an emission driver configured to provide emission control signals to the display panel; and
a timing controller configured to control the data driver, the scan driver and the emission driver,
wherein the display panel comprises:
a first OLED disposed in a first sub-pixel region, and configured to emit light of a first color;
a second OLED disposed in a second sub-pixel region adjacent to the first sub-pixel region in a row direction, and configured to emit light of a second color;
a third OLED disposed in a third sub-pixel region adjacent to the first sub-pixel region in a column direction, and configured to emit light of a third color;
a fourth OLED disposed in a fourth sub-pixel region adjacent to the second sub-pixel region in the column direction and adjacent to the third sub-pixel region in the row direction, and configured to emit light of the first color;
a first sub-pixel circuit disposed in the first sub-pixel region, and configured to drive the first OLED in the first sub-pixel region;
a second sub-pixel circuit disposed in the second sub-pixel region, and configured to drive the fourth OLED in the fourth sub-pixel region;
a third sub-pixel circuit disposed in the third sub-pixel region, and configured to drive the third OLED in the third sub-pixel region; and
a fourth sub-pixel circuit disposed in the fourth sub-pixel region, and configured to drive the second OLED in the second sub-pixel region.

Assignees

• Samsung Display Co Ltd

Inventors

• Hwang Young-In
• Gil Elly
• Kim Eungtaek
• Lee Jina
• Jo Joohyeon
• Chu Seongbaik

Classifications

• G09G2300/0852

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

• G09G2300/0452

  Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components · CPC title

• G09G3/2003

  Display of colours (specific for liquid crystal displays G09G3/3607) · CPC title

• G09G2230/00

  Details of flat display driving waveforms · CPC title

• G09G3/3233 Primary

  with pixel circuitry controlling the current through the light-emitting element · CPC title