Display device including data divider

Patent metadata

Field	Value
Publication number	US-10993431-B2
Application number	US-202016851188-A
Country	US
Kind code	B2
Filing date	Apr 17, 2020
Priority date	Nov 12, 2019
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

A display device includes: a data driver for providing data voltages to data output lines; a data divider for coupling the data output lines to data lines; and a data compensator for compensating data voltages based on a load difference between data voltages in adjacent pixel rows.

First claim

What is claimed is:

1. A display device comprising:
a data driver configured to provide first data voltages to data output lines during a first period, provide second data voltages to the data output lines during a second period after the first period, provide third data voltages to the data output lines during a third period after the second period, and provide fourth data voltages during a fourth period after the third period;
a data divider configured to couple the data output lines to first data lines during the first period, couple the data output lines to second data lines during the second period, couple the data output lines to the first data lines during the third period, and couple the data output lines to the second data lines during the fourth period;
first pixels configured to receive voltages charged in the first data lines and the second data lines after an initial time of the second period and before an initial time of the third period;
second pixels configured to receive voltages charged in the first data lines and the second data lines after an initial time of the fourth period; and
a data compensator configured to compensate the third data voltages and the fourth data voltages based on a first load difference between the first data voltages and the third data voltages, and a second load difference between the second data voltages and the fourth data voltages.

2. The display device of claim 1 , wherein the data compensator includes:
a first load calculator configured to sequentially output a load value of the first data voltages and a load value of the third data voltages; and
a second load calculator configured to sequentially output a load value of the second data voltages and a load value of the fourth data voltages.

3. The display device of claim 2 , wherein the data compensator further includes:
a first delay configured to output the load value of the first data voltages after a predetermined delay time; and
a second delay configured to output the load value of the second data voltages after the predetermined delay time.

4. The display device of claim 3 , wherein the predetermined delay time is one horizontal period.

5. The display device of claim 3 , wherein the data compensator further includes:
a first load difference calculator configured to output the first load difference based on an output of the first load calculator and an output of the first delay; and
a second load difference calculator configured to output the second load difference based on an output of the second load calculator and an output of the second delay.

6. The display device of claim 5 , wherein the data compensator further includes a crosstalk calculator configured to calculate a first crosstalk amount with respect to the third data voltages and a second crosstalk amount with respect to the fourth data voltages based on the first load difference and the second load difference.

7. The display device of claim 6 , wherein the first crosstalk amount is a value obtained by adding up the first load difference to which a first weight value is applied and the second load difference to which a second weight value is applied, and
the second crosstalk amount is a value obtained by adding up the first load difference to which a third weight value is applied and the second load difference to which a fourth weight value is applied.

8. The display device of claim 7 , wherein a sign of each of the first weight value, the third weight value, and the fourth weight value is different from that of the second weight value.

9. The display device of claim 8 , wherein the data compensator further includes a crosstalk compensator configured to compensate the third data voltages based on the first crosstalk amount and compensate the fourth data voltages based on the second crosstalk amount.

10. The display device of claim 9 , wherein each of the first pixels and the second pixels includes a P-type transistor,
wherein each of the first weight value, the third weight value, and the fourth weight value is a positive number, and the second weight value is a negative number, and
wherein the crosstalk compensator increases the third data voltages as the first crosstalk amount increases and increases the fourth data voltages as the second crosstalk amount increases.

11. The display device of claim 5 , wherein the data driver provides fifth data voltages to the data output lines during a fifth period between the second period and the third period, and provides sixth data voltages to the data output lines during a sixth period after the fourth period,
wherein the data divider couples the data output lines to third data lines during the fifth period and couples the data output lines to the third data lines during the sixth period, and
wherein the first pixels receive voltages charged in the first data lines, the second data lines, and the third data lines after an initial time of the fifth period and before an initial time of the third period, and
the second pixels receive voltages charged in the first data lines, the second data lines, and the third data lines after an initial time of the sixth period.

12. The display device of claim 11 , wherein the data compensator compensates the third data voltages, the fourth data voltages, and the sixth data voltages based on the first load difference, the second load difference, and a third load difference between the fifth data voltages and the sixth data voltages.

13. The display device of claim 12 , wherein the data compensator further includes a third load calculator configured to sequentially output a load value of the fifth data voltages and a load value of the sixth data voltages.

14. The display device of claim 13 , wherein the data compensator further includes a third delay configured to output the load value of the fifth data voltages after the predetermined delay time.

15. The display device of claim 14 , wherein the data compensator further includes a third load difference calculator configured to output the third load difference based on an output of the third load calculator and an output of the third delay.

16. The display device of claim 15 , wherein the data compensator further includes a crosstalk calculator configured to calculate a first crosstalk amount with respect to the third data voltages, a second crosstalk amount with respect to the fourth data voltages, and a third crosstalk amount with respect to the sixth data voltages based on the first load difference, the second load difference, and the third load difference.

17. The display device of claim 16 , wherein the first crosstalk amount is a value obtained by adding up the first load difference to which a first weight value is applied, the second load difference to which a second weight value is applied, and the third load difference to which a third weight value is applied,
the second crosstalk amount is a value obtained by adding up the first load difference to which a fourth weight value is applied, the second load difference to which a fifth weight value is applied, and the third load difference to which a sixth weight value is applied, and
the third crosstalk amount is a value obtained by adding up the first load difference to which a seventh weight value is applied, the second load difference to which an eighth weight value is applied, and the third load difference to which a ninth weight value is applied.

18. The display device of claim 17 , wherein a sign of each of the first weight value, the fourth weight value, the fifth weight value, the seventh wei

Assignees

• Samsung Display Co Ltd

Inventors

• Fujii Mitsuru
• Moon Ji Ye
• Seok Ju Gon
• Lee Hoo Hyeon

Classifications

• G09G2320/0238

  Improving the black level · CPC title

• G09G2310/08

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

• G09G2310/0275

  Details of drivers for data electrodes, other than drivers for liquid crystal, plasma or OLED displays, not related to handling digital grey scale data or to communication of data to the pixels by means of a current · CPC title

• G09G3/32

  semiconductive, e.g. using light-emitting diodes [LED] · CPC title

• G09G3/20 Primary

  for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} · CPC title