Display device

Patent metadata

Field	Value
Publication number	US-12477916-B2
Application number	US-202217980727-A
Country	US
Kind code	B2
Filing date	Nov 4, 2022
Priority date	Dec 31, 2021
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

A display device according to an exemplary embodiment of the present disclosure includes a display panel in which a plurality of pixels including a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel that have different colors are disposed; a data driver configured to supply data voltages to the plurality of pixels through a plurality of data lines; and a gate driver configured to supply gate signals to the plurality of pixels through a plurality of gate lines; wherein the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel are sequentially disposed in the same column, so that it is possible to improve a charging rate of a data voltage.

First claim

The invention claimed is:

1 . A display device, comprising:
a display panel in which a plurality of pixels including a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel that have different colors are disposed; a data driver configured to supply data voltages to the plurality of pixels through a plurality of data lines; and a gate driver configured to supply gate signals to the plurality of pixels through a plurality of gate lines; wherein the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel are sequentially disposed in the same column, wherein positioning of the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel disposed in an n+1th column is arranged so as to be a 180 degree rotation of the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel disposed in an nth column and is arranged so as to be a 180 degree rotation of the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel disposed in an n+2th column, n being a positive integer.

2 . The display device of claim 1 ,
wherein the first sub-pixel includes a first light emitting element and a first circuit element, the second sub-pixel includes a second light emitting element and a second circuit element, the third sub-pixel includes a third light emitting element and a third circuit element, and the fourth sub-pixel includes a fourth light emitting element and a fourth circuit element.

3 . The display device of claim 2 , further comprising:
a plurality of reference voltage lines, wherein each of the plurality of reference voltage lines is disposed between the first light emitting element and the first circuit element, between the second light emitting element and the second circuit element, between the third light emitting element and the third circuit element, and between the fourth light emitting element and a fourth circuit element.

4 . The display device of claim 2 ,
wherein for each of the plurality of pixels, the first to fourth circuit elements may be disposed in a saw tooth arrangement within the same pixel and/or wherein for each of the plurality of pixels, the first to fourth light emitting elements may be disposed in a saw tooth arrangement within the same pixel.

5 . The display device of claim 2 ,
wherein each of the plurality of data lines includes a first data line connected to a plurality of first sub-pixels, a second data line connected to a plurality of second sub-pixels, a third data line connected to a plurality of third sub-pixels and a fourth data line connected to the fourth sub-pixels, wherein the first data line and the third data line are disposed on a first side of the plurality of pixels sequentially disposed in the same column, wherein the second data line and the fourth data line are disposed on a second side of the plurality of pixels sequentially disposed in the same column.

6 . The display device of claim 5 ,
wherein the first circuit element and the third circuit element are disposed adjacent to the first data line and the third data line rather than the second data line and the fourth data line, and the second circuit element and the fourth circuit element are disposed adjacent to the second data line and the fourth data line rather than the first data line and the third data line.

7 . The display device of claim 5 ,
wherein a high potential voltage line is disposed between the first data line and the third data line, and a high potential voltage line is disposed between the second data line and the fourth data line.

8 . The display device of claim 1 ,
wherein each of the plurality of gate lines is disposed between the first sub-pixel and the second sub-pixel; and/or is disposed between the third sub-pixel and the fourth sub-pixel.

9 . The display device of claim 1 ,
wherein an odd-numbered gate line among the plurality of gate lines is disposed between the first sub-pixel and the second sub-pixel disposed in an odd-numbered column, and between the third sub-pixel and the fourth sub-pixel disposed in an even-numbered column.

10 . The display device of claim 1 ,
wherein an even-numbered gate line among the plurality of gate lines is disposed between the third sub-pixel and the fourth sub-pixel disposed in an odd-numbered column, and is disposed between the first sub-pixel and the second sub-pixel disposed in an even-numbered column.

11 . The display device of claim 1 ,
wherein each of the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel includes, a switching transistor, a driving transistor, a storage capacitor, a sensing transistor, and a light emitting element, wherein the sensing transistor outputs a threshold voltage and a voltage for sensing mobility of the driving transistor to a reference voltage line.

12 . A method of driving the display device of claim 1 , the method comprising:
turning-on the plurality of gate lines in an even-numbered frame in a different order than the plurality of gate lines in an odd-numbered frame.

13 . The method of claim 12 wherein the turn-on order in an odd-numbered frame is a first gate line, a second gate line, a fourth gate line, and a third gate line, and the turn-on order in an even-numbered frame is the second gate line, the first gate line, the third gate line, and the fourth gate line.

14 . The method of claim 12 wherein during an odd-numbered frame:
in a first horizontal period, a first gate voltage at a turn-on level is applied to the first gate line, so that a sub-pixel is charged with the data voltage;
in a second horizontal period, a second gate voltage at a turn-on level is applied to the second gate line, so that a sub-pixel is charged with the data voltage;
in a third horizontal period, a fourth gate voltage at a turn-on level is applied to the fourth gate line, so that a sub-pixel is discharged;
in the fourth horizontal period, a third gate voltage at a turn-on level is applied to the third gate line, so that a sub-pixel is discharged; and optionally wherein:
in the first horizontal period in which the charging of the data voltage is started, the data charging rate of the sub-pixel may be 40-70%;
in the second horizontal period in which the charging of the data voltage is completed, the charging rate of the sub-pixel may be 95-100%;
in the third horizontal period and the fourth horizontal period in which the data voltage is discharged, the charging rate of the respective sub-pixels may be 0%.

15 . The method of claim 14 wherein during an even-numbered frame:
in a first horizontal period, the second gate voltage at a turn-on level is applied to the second gate line, so that a sub-pixel is charged with the data voltage;
in a second horizontal period, the first gate voltage at a turn-on level is applied to the first gate line, so that a sub-pixel is charged with the data voltage;
in a third horizontal period, the third gate voltage at a turn-on level is applied to the third gate line, so that a sub-pixel is discharged;
in a fourth horizontal period, the fourth gate voltage at a turn-on level is applied to the fourth gate line, so that a sub-pixel is discharged; and wherein:
in the first horizontal period in which the charging of the data voltage is started, the data charging rate of the sub-pixel may be 40-70%;
in the second horizontal period in which the charging of the data voltage is completed, the charging rate of the sub-pixel may be 95-100%; and
in the third horizontal period and the fourth

Assignees

• Lg Display Co Ltd

Inventors

• Shin Seunghwan
• Lee Wonho

Classifications

• H10D86/441

  Interconnections, e.g. scanning lines · CPC title

• H10D86/60

  wherein the TFTs are in active matrices · CPC title

• G09G3/3291

  in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements · CPC title

• H10K59/1216

  the pixel elements being capacitors · CPC title

• H10K59/351 Primary

  comprising more than three subpixels, e.g. red-green-blue-white [RGBW] · CPC title