Round display device having a demultiplexer located between gate stages and light emitting stages

Patent metadata

Field	Value
Publication number	US-11996056-B2
Application number	US-202218088682-A
Country	US
Kind code	B2
Filing date	Dec 26, 2022
Priority date	Sep 2, 2020
Publication date	May 28, 2024
Grant date	May 28, 2024

Abstract

A display device may include a substrate including a circular display area and a non-display area, a plurality of pixels including a first pixel and a second pixel disposed on the display area of the substrate, a first sub-demux circuit connected to the first pixel and disposed on the non-display area, a second sub-demux circuit connected to the second pixel and disposed on the non-display area, a first connection line connected to the first sub-demux circuit and the second sub-demux circuit and disposed on the non-display area to transfer first and second data input signals to the first and second sub-demux circuits, and a plurality of gate stages connected to the pixels and disposed on the non-display area to transfer gate signals to the pixels. Some of the gate stages are disposed between the first sub-demux circuit and the second sub-demux circuit.

First claim

What is claimed is:

1. A display device comprising:
a substrate including a circular display area and a non-display area surrounding the display area;
a plurality of pixels including a first pixel, a second pixel, a third pixel, and a fourth pixel disposed on the display area of the substrate;
a first sub-demux circuit connected to the first pixel and disposed on the non-display area to transfer a first data output signal to the first pixel;
a second sub-demux circuit connected to the second pixel and disposed on the non-display area to transfer a second data output signal to the second pixel;
a third sub-demux circuit connected to the third pixel and disposed on the non-display area to transfer a third data output signal to the third pixel;
a fourth sub-demux circuit connected to the fourth pixel and disposed on the non-display area to transfer a fourth data output signal to the fourth pixel;
a first connection line connected to the first sub-demux circuit and the second sub-demux circuit and disposed on the non-display area to transfer a first data input signal to the first sub-demux circuit and transfer a second data input signal to the second sub-demux circuit;
a second connection line connected to the third sub-demux circuit and the fourth sub-demux circuit and dispose on the non-display area to transfer a third data input signal to the third sub-demux circuit and transfer a fourth data input signal to the fourth sub-demux circuit,
wherein a distance between the first sub-demux circuit and the second sub-demux circuit connected to the first connection line is different from a distance between the third sub-demux circuit and the fourth sub-demux circuit connected to the second connection line; and
a plurality of gate stages connected to the pixels and disposed on the non-display area to transfer gate signals to the pixels,
wherein some of the gate stages are disposed between the first sub-demux circuit and the second sub-demux circuit, and
wherein another of the gate stages are disposed between the second sub-demux circuit and the third sub-demux circuit, and
wherein still another of the gate stages are disposed between the third sub-demux circuit and the fourth sub-demux circuit,
wherein a number of light emitting stages disposed between the first sub-demux circuit and the second sub-demux circuit is different from a number of light emitting stages disposed between the third sub-demux circuit and the fourth sub-demux circuit.

2. The display device of claim 1 , wherein the distance between the first sub-demux circuit and the second sub-demux circuit connected to the first connection line is larger than the distance between the third sub-demux circuit and the fourth sub-demux circuit connected to the second connection line.

3. The display device of claim 1 , wherein a number of the gate stages disposed between the first sub-demux circuit and the second sub-demux circuit is different from a number of the gate stages disposed between the third sub-demux circuit and the fourth sub-demux circuit.

4. The display device of claim 1 , wherein the first pixel is disposed in a first pixel column, and the second pixel is disposed in a second pixel column, and the third pixel is disposed in a third pixel column, and the fourth pixel is disposed in a fourth pixel column.

5. A display device comprising:
a substrate including a circular display area and a non-display area surrounding the display area;
a plurality of pixels including a first pixel, a second pixel, a third pixel, and a fourth pixel disposed on the display area of the substrate;
a first sub-demux circuit connected to the first pixel and disposed on the non-display area to transfer a first data output signal to the first pixel;
a second sub-demux circuit connected to the second pixel and disposed on the non-display area to transfer a second data output signal to the second pixel;
a third sub-demux circuit connected to the third pixel and disposed on the non-display area to transfer a third data output signal to the third pixel;
a fourth sub-demux circuit connected to the fourth pixel and disposed on the non-display area to transfer a fourth data output signal to the fourth pixel;
a first connection line connected to the first sub-demux circuit and the second sub-demux circuit and disposed on the non-display area to transfer a first data input signal to the first sub-demux circuit and transfer a second data input signal to the second sub-demux circuit;
a second connection line connected to the third sub-demux circuit and the fourth sub-demux circuit and dispose on the non-display area to transfer a third data input signal to the third sub-demux circuit and transfer a fourth data input signal to the fourth sub-demux circuit,
wherein a distance between the first sub-demux circuit and the second sub-demux circuit connected to the first connection line is different from a distance between the third sub-demux circuit and the fourth sub-demux circuit connected to the second connection line; and
a plurality of light emitting stages connected to the pixels and disposed on the non-display area to transfer light emitting signals to the pixels,
wherein some of the light emitting stages are disposed between the first sub-demux circuit and the second sub-demux circuit, and
wherein another of the light emitting stages are disposed between the second sub-demux circuit and the third sub-demux circuit, and
wherein still another of the light emitting stages are disposed between the third sub-demux circuit and the fourth sub-demux circuit.

6. The display device of claim 5 , wherein a number of the light emitting stages disposed between the first sub-demux circuit and the second sub-demux circuit is different from a number of the light emitting stages disposed between the third sub-demux circuit and the fourth sub-demux circuit.

Assignees

• Samsung Display Co Ltd

Inventors

• Kwak Minchae
• Kim Kyeonghwa
• Kim Mihae
• Oh Kyonghwan
• Jang Sumi
• Jo Seunghan
• Choi Jae-Ho

Classifications

• G09G2300/0842

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

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• G09G3/3266

  Details of drivers for scan electrodes · CPC title

• G09G3/3233 Primary

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

• G09G3/3275 Primary

  Details of drivers for data electrodes · CPC title