CN-121999724-A - Display device

CN121999724ACN 121999724 ACN121999724 ACN 121999724ACN-121999724-A

Abstract

The display apparatus includes a sub-pixel connected to a data line, a first sub-light emission control line, a first sub-gate line, and a second sub-gate line, and including a light emitting element, a gate driver configured to supply a first sub-light emission control signal to the first sub-light emission control line, to supply a first sub-gate signal to the first sub-gate line, and to supply a second sub-gate signal to the second sub-gate line, and a data driver configured to supply a data voltage to the data line, wherein a length of a period in which the second sub-gate signal is supplied during a display scan period is different from a length of a period in which the second sub-gate signal is supplied during a self-scan period, and wherein the second sub-gate signal is provided to control a time in which an electrode of the light emitting element is initialized.

Inventors

JIN BINGZHE
XU JUN
LI XIANGMING
QUAN WUZHE
Song Bingguan
YAN JIMING
LI ZAIXUN
Che Jishi
Jiang Shangxian
Jin Panzhou

Assignees

三星显示有限公司

Dates

Publication Date: 20260508
Application Date: 20251103
Priority Date: 20241104

Claims (10)

1. A display device, comprising: a sub-pixel connected to the data line, the first sub-light emission control line, the first sub-gate line, and the second sub-gate line, and including a light emitting element; A gate driver configured to supply a first sub-light emission control signal to the first sub-gate line, a first sub-gate signal to the first sub-gate line, and a second sub-gate signal to the second sub-gate line, and A data driver configured to supply a data voltage to the data line, Wherein a length of a period in which the second sub-gate signal is supplied during a display scan period is different from a length of a period in which the second sub-gate signal is supplied during a self-scan period, and Wherein the second sub-gate signal is provided to control a time at which an electrode of the light emitting element is initialized.
2. The display device of claim 1, wherein the sub-pixel comprises: A first transistor configured to control a driving current, the first transistor being connected between a first node receiving a first power supply voltage and a second node, and including a gate electrode connected to a third node; A second transistor connected between the data line and the third node and including a gate electrode connected to the first sub-gate line; a third transistor connected between the second node and a fourth node and including a gate electrode connected to the first sub-emission control line, and A fourth transistor connected between a node configured to supply an initialization voltage and the fourth node and including a gate electrode connected to the second sub-gate line, Wherein the light emitting element is connected between the fourth node and a node receiving a second power supply voltage.
3. The display device according to claim 1 or 2, wherein: The gate driver is configured to supply the second sub-gate signal during the first period during the display scan period, and During the self-scan period, the gate driver is configured to supply the second sub-gate signal for a second period.
4. A display device according to claim 3, wherein the length of the first period is longer than the length of the second period.
5. A display device according to claim 3, wherein the length of the first period is shorter than the length of the second period.
6. A display device, comprising: a sub-pixel connected to the data line, the first sub-light emission control line, the first sub-gate line, and the second sub-gate line, and including a light emitting element; A gate driver configured to supply a first sub-light emission control signal to the first sub-gate line, a first sub-gate signal to the first sub-gate line, and a second sub-gate signal to the second sub-gate line, and A data driver configured to supply a data voltage to the data line, Wherein the number of times the second sub-gate signal is supplied during the display scan period is different from the number of times the second sub-gate signal is supplied during the self-scan period, and Wherein the second sub-gate signal is provided to control a time at which an electrode of the light emitting element is initialized.
7. The display device of claim 6, wherein the sub-pixel comprises: A first transistor configured to control a driving current, the first transistor being connected between a first node receiving a first power supply voltage and a second node, and including a gate electrode connected to a third node; A second transistor connected between the data line and the third node and including a gate electrode connected to the first sub-gate line; a third transistor connected between the second node and a fourth node, the third transistor including a gate electrode connected to the first sub-emission control line, and A fourth transistor connected between a node configured to supply an initialization voltage and the fourth node, the fourth transistor including a gate electrode connected to the second sub-gate line, Wherein the light emitting element is connected between the fourth node and a node receiving a second power supply voltage.
8. The display device according to claim 6 or 7, wherein the number of times the gate driver supplies the second sub-gate signal during the display scan period is smaller than the number of times the gate driver supplies the second sub-gate signal during the self-scan period.
9. The display device according to claim 7, wherein the number of switching times of the second sub-gate signal during the display scan period is smaller than the number of switching times of the second sub-gate signal during the self-scan period.
10. The display device according to claim 9, wherein the number of switching times is a number of logic level changes of the second sub-gate signal.

Description

Display device The present application claims priority and benefit from korean patent application No. 10-2024-0154533 filed at the korean intellectual property office on day 11 and 4 of 2024, the entire disclosure of which is incorporated herein by reference. Technical Field Aspects of some embodiments of the present disclosure relate to a display device and an electronic device including the display device. Background With the development of information technology, the importance of display devices that provide a connection medium between a user and information is increasing. Accordingly, the use of display devices such as liquid crystal display devices and organic light emitting display devices is increasing. The display device may include a plurality of pixels. The pixel columns may be connected to the same data line. In this case, when the data voltage is rapidly changed, it may affect other pixel rows in which the data voltage is not written. This may result in an unintended image such as a spot being visually recognized in some areas of the display panel. The above information disclosed in this background section is only for enhancement of understanding of the background art and, therefore, the information discussed in this background section does not necessarily form the prior art. Disclosure of Invention Aspects of some embodiments of the present disclosure include display devices that minimize or reduce speckle and electronic devices that include display devices. According to some embodiments of the present disclosure, a display device includes a sub-pixel connected to a data line, a first sub-light emitting control line, a first sub-gate line, and a second sub-gate line, and including a light emitting element, a gate driver supplying the first sub-light emitting control signal to the first sub-light emitting control line, supplying the first sub-gate signal to the first sub-gate line, and supplying the second sub-gate signal to the second sub-gate line, and a data driver supplying a data voltage to the data line. The length of the period in which the second sub-gate signal is supplied during the display scan period is different from the length of the period in which the second sub-gate signal is supplied during the self-scan period. The second sub-gate signal is provided to control the time at which the electrode of the light emitting element is initialized. According to some embodiments, the sub-pixel may include a first transistor controlling a driving current, the first transistor being connected between a first node receiving a first power voltage and a second node and including a gate electrode connected to a third node, a second transistor being connected between a data line and the third node and including a gate electrode connected to a first sub-gate line, a third transistor being connected between the second node and a fourth node and including a gate electrode connected to a first sub-light emission control line, and a fourth transistor being connected between a node providing an initialization voltage and the fourth node and including a gate electrode connected to a second sub-gate line. According to some embodiments, the light emitting element may be connected between the fourth node and a node receiving the second supply voltage. According to some embodiments, the data voltage may be written to the sub-pixel during the display scan period, and the data voltage may not be written to the sub-pixel during the self-scan period. According to some embodiments, the gate driver may supply the second sub-gate signal during the display scan period for the first period. During the self-scan period, the gate driver may supply the second sub-gate signal for a second period. According to some embodiments, the length of the first period may be longer than the length of the second period. According to some embodiments, a length between an end time of the non-emission period including the first period and an end time of the first period may be the same as a length between an end time of the non-emission period including the second period and an end time of the second period. According to some embodiments, a length between a start time of the non-emission period including the first period and a start time of the first period may be shorter than a length between a start time of the non-emission period including the second period and a start time of the second period. According to some embodiments, the length of the first period may be shorter than the length of the second period. According to some embodiments, a length between an end time of the non-emission period including the first period and an end time of the first period may be the same as a length between an end time of the non-emission period including the second period and an end time of the second period. According to some embodiments, a length between a start time of the non-emission period including the first period and a start time of the