Display device

Patent metadata

Field	Value
Publication number	US-12354550-B2
Application number	US-202418758335-A
Country	US
Kind code	B2
Filing date	Jun 28, 2024
Priority date	Jul 5, 2023
Publication date	Jul 8, 2025
Grant date	Jul 8, 2025

Abstract

A display device includes pixels arranged in rows and columns, a scan driver, and a read-out circuit, wherein the read-out circuit is configured to read-out electrical properties of a pixel through the read-out line. The first pixel includes a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, an eighth transistor, a ninth transistor, a first organic light-emitting diode connected between a second electrode of the seventh transistor and a ground node to which a ground voltage is applied, a second organic light-emitting diode between the second electrode of the eighth transistor and the ground node, and a third organic light-emitting diode connected between the second electrode of the ninth transistor and the ground node.

First claim

What is claimed is:

1. A display device comprising:
pixels arranged in rows and columns;
a scan driver connected to the rows of the pixels, wherein a first row of the rows of the pixels is connected to the scan driver through a scan line, a first emission control line, a second emission control line, a third emission control line, a fourth emission control line, an initialization line, and a read-out control line;
a data driver connected to the columns of the pixels, wherein a first column of the columns of the pixels is connected to the scan driver through a data line; and
a read-out circuit connected to the columns of the pixels and configured to read-out electrical properties of the pixels through a read-out line, wherein the first column is connected to the read-out circuit through the read-out line,
wherein a first pixel of the pixels comprises:
a first transistor comprising a first electrode connected to a first node, a second electrode connected to a third node, and a gate connected to a second node;
a second transistor comprising a first electrode connected to the data line, a second electrode connected to the first node, and a gate connected to the scan line;
a third transistor comprising a first electrode connected to the second node, a second electrode connected to the third node, and a gate connected to the scan line;
a fourth transistor comprising a first electrode connected to a power node configured to supply a power supply voltage, a second electrode connected to the first node, and a gate connected to the first emission control line;
a fifth transistor comprising a first electrode connected to the read-out line, a second electrode connected to the second node, and a gate connected to the initialization line;
a sixth transistor comprising a first electrode connected to the read-out line, a second electrode connected to the third node, and a gate connected to the read-out control line;
a seventh transistor comprising a first electrode connected to the third node, a second electrode, and a gate connected to the second emission control line;
an eighth transistor comprising a first electrode connected to the third node, a second electrode, and a gate connected to the third emission control line;
a ninth transistor comprising a first electrode connected to the third node, a second electrode, and a gate connected to the fourth emission control line;
a capacitor connected to the first node and the second node;
a first organic light-emitting diode connected between the second electrode of the seventh transistor and a ground node;
a second organic light-emitting diode between the second electrode of the eighth transistor and the ground node; and
a third organic light-emitting diode connected between the second electrode of the ninth transistor and the ground node.

2. The display device of claim 1 , wherein the scan driver is configured to, in a reset section of the first pixel, output a scan signal at an inactive level through the scan line, output an initialization signal at an active level through the initialization line, output a read-out control signal at an inactive level through the read-out control line, output a first emission control signal at an active level through the first emission control line, output a second emission control signal at an inactive level through the second emission control line, output a third emission control signal at an inactive level through the third emission control line, and output a fourth emission control signal at an inactive level through the fourth emission control line.

3. The display device of claim 1 , wherein the scan driver is configured to, in a program section of the first pixel, output a scan signal at an active level through the scan line, output an initialization signal at an inactive level through the initialization line, output a read-out control signal at an inactive level through the read-out control line, output a first emission control signal at an inactive level through the first emission control line, output a second emission control signal at an inactive level through the second emission control line, output a third emission control signal at an inactive level through the third emission control line, and output a fourth emission control signal at an inactive level through the fourth emission control line.

4. The display device of claim 1 , wherein the scan driver is configured to, in a hold section of the first pixel, output a scan signal at an inactive level through the scan line, output an initialization signal at an inactive level through the initialization line, output a read-out control signal at an inactive level through the read-out control line, output a first emission control signal at an inactive level through the first emission control line, output a second emission control signal at an inactive level through the second emission control line, output a third emission control signal at an inactive level through the third emission control line, and output a fourth emission control signal at an inactive level through the fourth emission control line.

5. The display device of claim 1 , wherein the scan driver is configured to, in a first emission section of the first pixel, output a scan signal at an inactive level through the scan line, output an initialization signal at an inactive level through the initialization line, output a read-out control signal at an inactive level through the read-out control line, output a first emission control signal at an active level through the first emission control line, output a second emission control signal at an active level through the second emission control line, output a third emission control signal at an inactive level through the third emission control line, and output a fourth emission control signal at an inactive level through the fourth emission control line.

6. The display device of claim 1 , wherein the scan driver is configured to, in a second emission section of the first pixel, output a scan signal at an inactive level through the scan line, output an initialization signal at an inactive level through the initialization line, output a read-out control signal at an inactive level through the read-out control line, output a first emission control signal at an active level through the first emission control line, output a second emission control signal at an inactive level through the second emission control line, output a third emission control signal at an active level through the third emission control line, and output a fourth emission control signal at an inactive level through the fourth emission control line.

7. The display device of claim 1 , wherein the scan driver is configured to, in a third emission section of the first pixel, output a scan signal at an inactive level through the scan line, output an initialization signal at an inactive level through the initialization line, output a read-out control signal at an inactive level through the read-out control line, output a first emission control signal at an active level through the first emission control line, output a second emission control signal at an inactive level through the second emission control line, output a third emission control signal at an inactive level through the third emission control line, and output a fourth emission control signal at an active level through the fourth emission control line.

8. The display device of claim 1 , wherein the scan driver is configured to, in a first read-out section of the first pixel, output a scan signal at an inactive level through the scan line, output an initialization signal at an inactive level through the initialization line, output a read-out control signal at an active level through the read-out control lin

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Sunkwon
• Song Uijong
• Kwon Yongil
• Ryu Seongyoung
• Lee Yilho
• Lee Heejin

Classifications

• G09G2300/0842

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

• G09G2320/0626

  for control of overall brightness · CPC title

• G09G2300/0861

  with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes · CPC title

• G09G2310/08

  Details of timing specific for flat panels, other than clock recovery · CPC title

• G09G2300/0819

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