Display device and method of manufacturing the same for providing consistent display quality

Patent metadata

Field	Value
Publication number	US-11222941-B2
Application number	US-202016746289-A
Country	US
Kind code	B2
Filing date	Jan 17, 2020
Priority date	Feb 12, 2019
Publication date	Jan 11, 2022
Grant date	Jan 11, 2022

Abstract

A display device includes an active pattern disposed on a substrate, a first transistor, a first scan line, a first power voltage line, a first electrode pattern and an organic light-emitting layer disposed on the substrate. The first transistor includes a first gate electrode disposed in a first overlapping area of the active pattern where the first gate electrode overlaps the active pattern. The first scan line is disposed adjacent to the first gate electrode. The first power voltage line includes a first electrode portion and a second electrode portion. The first electrode portion overlaps the first gate electrode. The second electrode portion extends from the first electrode portion in a direction crossing the first scan line and overlaps the first scan line.

First claim

What is claimed is:

1. A display device comprising:
an active pattern disposed on a substrate;
a first transistor including a first gate electrode disposed in a first overlapping area of the active pattern where the first gate electrode overlaps the active pattern in plan view;
a first scan line disposed adjacent to the first gate electrode;
a first power voltage line including a first electrode portion and a second electrode portion, the first electrode portion overlapping the first gate electrode in plan view, the second electrode portion extending from the first electrode portion in a direction crossing the first scan line and overlapping the first scan line in plan view at an overlap area;
a first electrode pattern connected to the first gate electrode and overlapping the overlap area in plan view; and
an organic light-emitting layer disposed on the substrate.

2. The display device of claim 1 , further comprising:
a first insulation layer disposed on the active pattern;
a second insulation layer disposed on the first gate electrode;
a third insulation layer disposed on the first power voltage line; and
a fourth insulation layer disposed on the first electrode pattern,
wherein the first gate electrode is disposed on the first insulation layer, the first power voltage line is disposed on the second insulation layer, and the first electrode pattern is disposed on the third insulation layer.

3. The display device of claim 1 , further comprising:
a second transistor including a second gate electrode disposed in a second overlapping area of the active pattern where the first scan line overlaps the active pattern; and
a third transistor including a third gate electrode disposed in a third overlapping area of the active pattern where the first scan line overlaps the active pattern,
wherein the first electrode pattern is connected to a third drain electrode of the third transistor.

4. The display device of claim 1 , further comprising:
a data line crossing the first scan line; and
a second power voltage line crossing the first power voltage line and being connected to the first power voltage line.

5. The display device of claim 1 , further comprising:
a second scan line disposed parallel to the first scan line;
a fourth transistor including a fourth gate electrode disposed in a fourth overlapping area of the active pattern where the second scan line overlaps the active pattern; and
a seventh transistor including a seventh gate electrode disposed in a seventh overlapping area of the active pattern where the second scan line overlaps the active pattern.

6. The display device of claim 5 , further comprising:
an initializing voltage line disposed parallel to the first scan line; and
a second electrode pattern connecting the initializing voltage line to a seventh drain electrode of the seventh transistor.

7. The display device of claim 1 , further comprising:
a light-emitting line disposed parallel to the first scan line;
a fifth transistor including a fifth gate electrode disposed in a fifth overlapping area of the active pattern where the light-emitting line overlaps the active pattern; and
a sixth transistor including a sixth gate electrode disposed in a sixth overlapping area of the active pattern where the light-emitting line overlaps the active pattern.

8. The display device of claim 7 , further comprising a third electrode pattern connected to a sixth drain electrode of the sixth transistor.

9. A display device comprising:
a first transistor;
a second transistor connected to a first scan line, a data line crossing the first scan line and a source electrode of the first transistor;
a power voltage line transferring a first power voltage;
a first storage capacitor connected to the power voltage line and a gate electrode of the first transistor;
a second storage capacitor connected to the power voltage line and the gate electrode of the first transistor;
a third transistor connected to the first scan line, the gate electrode of the first transistor and a drain electrode of the first transistor; and
an organic light-emitting diode receiving a second power voltage and generating a light in response to operation of the first transistor.

10. The display device of claim 9 , further comprising;
a fifth transistor connected to a light-emitting line, the power voltage line and the source electrode of the first transistor; and
a sixth transistor connected to the light-emitting line, a drain electrode of the first transistor and the organic light-emitting diode.

11. The display device of claim 10 , further comprising:
a fourth transistor connected to a second scan line, the gate electrode of the first transistor and an initializing voltage line receiving an initializing voltage; and
a seventh transistor connected to the second scan line, the initializing voltage line and the organic light-emitting diode.

12. The display device of claim 11 , wherein the first scan line receives an n-th scan signal, and the second scan line receives an (n−1)-th scan signal, wherein n is a natural number.

13. The display device of claim 9 , further comprising a capacitor connected to the power voltage line and the gate electrode of the second transistor.

Assignees

• Samsung Display Co Ltd

Inventors

• Park Yong Sung
• Ki Wonjang
• Noh Dae-Hyun
• Lee Minsu
• Lee Seung Bin

Classifications

• H10K59/131 Primary

  Interconnections, e.g. wiring lines or terminals · CPC title

• G09G3/3233 Primary

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

• G09G2310/0251

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

• G09G2320/045

  Compensation of drifts in the characteristics of light emitting or modulating elements · CPC title

• G09G3/3266

  Details of drivers for scan electrodes · CPC title