Display device

Patent metadata

Field	Value
Publication number	US-12165586-B2
Application number	US-202318234105-A
Country	US
Kind code	B2
Filing date	Aug 15, 2023
Priority date	Oct 6, 2022
Publication date	Dec 10, 2024
Grant date	Dec 10, 2024

Abstract

A display device includes a display panel including a plurality of pixels and that displays an image in each of a plurality of frames, a driving controller that drives the plurality of frames with a plurality of driving frequencies, respectively, and a voltage controller that provides a first voltage and a second voltage, and the driving controller drives one of the plurality of frames with a first driving frequency and drives another one of the plurality of frames with a second driving frequency, and the voltage controller provides the second voltage to be repeated in a first period in the one of the plurality of frames and provides the second voltage to be repeated in a second period in the another one of the plurality of frames.

First claim

What is claimed is:

1. A display device comprising:
a display panel which includes a plurality of pixels and displays an image in each of a plurality of frames;
a driving controller which drives the plurality of frames with a plurality of driving frequencies, respectively; and
a voltage controller which provides a first voltage, a high level, and a second voltage in which a low level having a voltage level different from the high level is repeated at a predetermined period to the display panel,
wherein the driving controller drives one of the plurality of frames with a first driving frequency and drives another one of the plurality of frames with a second driving frequency having a different frequency from the first driving frequency, and
wherein the voltage controller provides the second voltage to be repeated in a first period in the one of the plurality of frames, and provides the second voltage to be repeated in a second period having a longer width than a width of the first period in the another one of the plurality of frames, and
wherein, when the second driving frequency is 1/n times the first driving frequency, the low level of the second voltage is repeated by a natural number of n−1 or less during a frame driven at the second driving frequency.

2. The display device of claim 1 , wherein each of the plurality of pixels includes:
a first transistor including a gate electrode connected to a first node, a first electrode connected to a first voltage line to which the first voltage is provided, and a second electrode connected to a second node;
a second transistor including a gate electrode connected to a first scan line, a first electrode connected to the first node, and a second electrode connected to a third node;
a first capacitor connected between the first node and an initialization voltage line;
a third transistor including a gate electrode connected to a second scan line, a first electrode connected to the third node, and a second electrode connected to the second node;
a second capacitor connected between the third node and a data line; and
a light-emitting diode including a first electrode connected to the second node and a second electrode connected to a second voltage line to which the second voltage is provided.

3. The display device of claim 2 , wherein a first luminance of light emitted from the light-emitting diode in the one of the plurality of frames is higher than a second luminance of light emitted from the light-emitting diode in the another one of the plurality of frames.

4. The display device of claim 2 , wherein a first emission time of light emitted from the light-emitting diode in the one of the plurality of frames is shorter than a second emission time of light emitted from the light-emitting diode in the another one of the plurality of frames.

5. The display device of claim 1 , wherein the first driving frequency is higher than the second driving frequency.

6. The display device of claim 1 , further comprising:
a data driver electrically connected to the display panel, and
wherein the display panel further includes a plurality of data lines respectively connected to the plurality of pixels, and
wherein the data driver simultaneously provides data voltages generated in units of pixel rows to the plurality of pixels through the plurality of data lines.

7. The display device of claim 6 , wherein a first height between a high level and a low level of a data voltage of the data voltages provided to the one of the plurality of frames is greater than a second height between the high level and the low level of the data voltage provided to the another one of the plurality of frames.

8. The display device of claim 1 , wherein the high level is equal to or greater than a voltage level of a low level of the first voltage.

9. The display device of claim 1 , wherein the low level is less than a voltage level of a high level of the first voltage.

10. The display device of claim 1 , wherein a first height between the high level and the low level of the second voltage in the one of the plurality of frames is greater than a second height between the high level and the low level of the second voltage in the another one of the plurality of frames.

11. The display device of claim 10 , wherein a first voltage level of the low level of the second voltage in the one of the plurality of frames is less than a second voltage level of the low level of the second voltage in the another one of the plurality of frames.

12. The display device of claim 1 , wherein a first width of a period in which the low level of the second voltage is provided in the one of the plurality of frames is less than a second width of a period in which the low level of the second voltage is provided in the another one of the plurality of frames.

13. A display device comprising:
a display panel including a plurality of pixels, each of the plurality of pixels including:
a first transistor including a gate electrode connected to a first node, a first electrode connected to a first voltage line to which a first voltage is provided, and a second electrode connected to a second node;
a second transistor including a gate electrode connected to a first scan line, a first electrode connected to the first node, and a second electrode connected to a third node;
a first capacitor connected between the first node and an initialization voltage line;
a third transistor including a gate electrode connected to a second scan line, a first electrode connected to the third node, and a second electrode connected to the second node;
a second capacitor connected between the third node and a data line; and
a light-emitting diode including a first electrode connected to the second node and a second electrode connected to a second voltage line to which a second voltage in which a high level and a low level having a voltage level different from the high level are repeated in a predetermined period is provided,

wherein the display panel displays an image in each of a plurality of frames respectively driven at a plurality of driving frequencies, and
wherein the second voltage is provided such that a high level and a low level are repeated in a first period in a first frame operating at a first driving frequency among the plurality of frames, and is provided such that the high level and the low level are repeated in a second period having a longer width than the first period in a second frame operating at a second driving frequency lower than the first driving frequency among the plurality of frames.

14. The display device of claim 13 , wherein a first luminance of light emitted from the light-emitting diode in the first frame is higher than a second luminance of light emitted from the light-emitting diode in the second frame.

15. The display device of claim 13 , wherein a first emission time of light emitted from the light-emitting diode in the first frame may be shorter than a second emission time of light emitted from the light-emitting diode in the second frame.

16. The display device of claim 13 , wherein a first height between the high level and the low level of the second voltage in the first frame is greater than a second height between the high level and the low level of the second voltage in the second frame.

17. The display device of claim 13 , wherein a first voltage level of the low level of the second voltage in the first frame is less than a second voltage level of the low level of the second voltage in the second frame.

18. The display device of claim 13 , wherein a fi

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Sukhun
• Gu Bon-Seog
• Kim Hongsoo
• Lee Myungwoo

Classifications

• G09G2330/021

  Power management, e.g. power saving · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• G09G2330/028

  Generation of voltages supplied to electrode drivers in a matrix display other than LCD · CPC title

• G09G2300/0842

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

• G09G2320/0247

  Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes · CPC title