Display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-12225771-B2
Application number	US-202117318350-A
Country	US
Kind code	B2
Filing date	May 12, 2021
Priority date	Sep 10, 2020
Publication date	Feb 11, 2025
Grant date	Feb 11, 2025

Abstract

A display device includes a first transistor including a first transistor including a light blocking pattern on a substrate, an active pattern on the light blocking pattern, and a gate electrode on the active pattern, a second transistor configured to provide a data voltage to the first transistor in response to a gate signal, and a storage capacitor electrically connected to the gate electrode and the light blocking pattern, and including a first conductive pattern in a same layer as the light blocking pattern, a second conductive pattern on the first conductive pattern and overlapping the first conductive pattern, a third conductive pattern in a same layer as the gate electrode, overlapping the second conductive pattern, and electrically connected to the first conductive pattern, and a fourth conductive pattern on the third conductive pattern, overlapping the third conductive pattern, and electrically connected to the second conductive pattern.

First claim

What is claimed is:

1. A display device comprising:
a first transistor comprising a light blocking pattern on a substrate, an active pattern comprising a drain region and a source region on the light blocking pattern, and a gate electrode on the active pattern;
a second transistor for providing a data voltage to the first transistor in response to a gate signal;
a first electrode on the gate electrode, directly electrically connected to the light blocking pattern, and directly electrically connected to the drain region or the source region;
an emission layer on the first electrode;
a storage capacitor electrically connected to the gate electrode and the light blocking pattern, and comprising:
a first conductive pattern in a same layer as the light blocking pattern;
a second conductive pattern on the first conductive pattern and overlapping the first conductive pattern;
a third conductive pattern in a same layer as the gate electrode, overlapping the second conductive pattern, at a different layer than the first conductive pattern, and electrically connected to the first conductive pattern; and
a fourth conductive pattern on the third conductive pattern, overlapping the third conductive pattern, and electrically connected to the second conductive pattern; and

a semiconductor pattern in a same layer as the active pattern, and contacting the second conductive pattern, wherein the semiconductor pattern is not doped,
wherein the first electrode directly contacts the emission layer and the light blocking pattern, and directly contacts the drain region or the source region.

2. The display device of claim 1 , wherein the first conductive pattern and the second conductive pattern form a first capacitance.

3. The display device of claim 2 , wherein the second conductive pattern and the third conductive pattern form a second capacitance.

4. The display device of claim 3 , wherein the third conductive pattern and the fourth conductive pattern form a third capacitance.

5. The display device of claim 1 , wherein the first conductive pattern, the second conductive pattern, and the third conductive pattern overlap each other.

6. The display device of claim 1 , wherein the first conductive pattern, the second conductive pattern, and the fourth conductive pattern overlap each other.

7. The display device of claim 1 , wherein the first conductive pattern, the third conductive pattern, and the fourth conductive pattern overlap each other.

8. The display device of claim 1 , wherein the second conductive pattern, the third conductive pattern, and the fourth conductive pattern overlap each other.

9. The display device of claim 1 , further comprising a second electrode on the emission layer,
wherein the fourth conductive pattern is in a same layer as the first electrode.

10. The display device of claim 1 , wherein the first conductive pattern, the third conductive pattern, and the gate electrode are for receiving a first signal, and
wherein the second conductive pattern, the fourth conductive pattern, and the light blocking pattern are for receiving a second signal.

11. The display device of claim 1 , wherein the first conductive pattern and the third conductive pattern comprise a same material.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Hyungjun
• Koo Soyoung
• Kim Eok Su
• Nam Yunyong
• Lim Jun Hyung
• Jeon Kyungjin

Classifications

• H10K59/131 Primary

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

• H10K59/1216 Primary

  the pixel elements being capacitors · CPC title

• H10D86/441

  Interconnections, e.g. scanning lines · CPC title

• H10D86/0231

  using masks, e.g. half-tone masks · CPC title

• H10D86/0221

  comprising manufacture, treatment or patterning of TFT semiconductor bodies · CPC title