US-20260128010-A1 - DISPLAY DEVICE AND ELECTRONIC DEVICE INCLUDING SAME

US20260128010A1US 20260128010 A1US20260128010 A1US 20260128010A1US-20260128010-A1

Abstract

A display device 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 emitting control line, to supply a first sub-gate signal to the first sub-gate line, and 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 at which an electrode of the light-emitting element is initialized.

Inventors

Byung Chul Kim
Joon Huh
Sang Myoung LEE
Oh Chul Kwon
Byung Kwan Song
Ki Myeong Eom
Jae Hoon Lee
Ki Seok Cha
Sang Hyun Kang
Pan Ju Kim

Assignees

SAMSUNG DISPLAY CO., LTD.

Dates

Publication Date: 20260507
Application Date: 20251027
Priority Date: 20241104

Claims (20)

1 . The display device comprising: 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 emitting control line, to supply a first sub-gate signal to the first sub-gate line, and 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 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 driving current, the first transistor coupled between a first node which receives a first power supply voltage and a second node and including a gate electrode coupled 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-light emission control line; and a fourth transistor connected between a node configured to provide 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 which receives a second power supply voltage.
3 . The display device of claim 2 , wherein the data voltage is written to the sub-pixel during the display scan period, and the data voltage is not written to the sub-pixel during the self-scan period.
4 . The display device of claim 3 , wherein: during the display scan period, the gate driver is configured to supply the second sub-gate signal for a first period; and during the self-scan period, the gate driver is configured to supply the second sub-gate signal for a second period.
5 . The display device of claim 4 , wherein a length of the first period is longer than a length of the second period.
6 . The display device of claim 5 , wherein a length between an end time of a non-emission period including the first period and an end time of the first period is the same as a length between an end time of a non-emission period including the second period and an end time of the second period.
7 . The display device of claim 6 , wherein a length between a start time of the non-emission period including the first period and a start time of the first period is 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.
8 . The display device of claim 4 , wherein a length of the first period is shorter than a length of the second period.
9 . The display device of claim 8 , wherein a length between an end time of a non-emission period including the first period and an end time of the first period is the same as a length between an end time of a non-emission period including the second period and an end time of the second period.
10 . The display device of claim 9 , wherein a length between a start time of the non-emission period including the first period and a start time of the first period is longer than a length between a start time of the non-emission period including the second period and a start time of the second period.
11 . The display device of claim 5 , wherein the sub-pixel further comprises: a fifth transistor connected between a node configured to receive the first power supply voltage and the first node, and including a gate electrode connected to a second sub-light emission control line; and a sixth transistor connected between a node configured to receive a reference voltage and the third node, and including a gate electrode connected to a third sub-gate line, and wherein the gate driver is configured to supply a second sub-light emission control signal to the second sub-light emitting control line, and to supply a third sub-gate signal to the third sub-gate line.
12 . The display device comprising: 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 emitting control line, to supply a first sub-gate signal to the first sub-gate line, and 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 number of times that the second sub-gate signal is supplied during a display scan period is different from a 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.
13 . The display device of claim 12 , wherein the sub-pixel comprises: a first transistor configured to control driving current, the first transistor coupled between a first node which receives a first power supply voltage and a second node and including a gate electrode coupled 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-light emission control line; and a fourth transistor connected between a node configured to provide 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 which receives a second power supply voltage.
14 . The display device of claim 13 , wherein the data voltage is written to the sub-pixel during the display scan period, and the data voltage is not written to the sub-pixel during the self-scan period.
15 . The display device of claim 14 , wherein a number of times the gate driver supplies the second sub-gate signal during the display scan period is less than a number of times the gate driver supplies the second sub-gate signal during the self-scan period.
16 . The display device of claim 14 , wherein a number of toggles of the second sub-gate signal during the display scan period is less than a number of toggles of the second sub-gate signal during the self-scan period.
17 . The display device of claim 16 , wherein a number of toggles is a number of times a logic level of the second sub-gate signal changes.
18 . The display device of claim 14 , wherein a number of times the gate driver supplies the second sub-gate signal during the display scan period is greater than a number of times the gate driver supplies the second sub-gate signal during the self-scan period.
19 . The display device of claim 15 , wherein the sub-pixel further comprises: a fifth transistor connected between a node configured to receive the first power supply voltage and the first node, and including a gate electrode connected to a second sub-light emission control line; and a sixth transistor connected between a node configured to receive a reference voltage and the third node, and including a gate electrode connected to a third sub-gate line, wherein the gate driver is configured to supply a second sub-light emission control signal to the second sub-light emitting control line, and is configured to supply a third sub-gate signal to the third sub-gate line.
20 . An electronic device comprising: a processor; and a display device including pixels, and configured to display an image in the pixels under a control of the processor; the display device comprises: 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 emitting 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 the second sub-gate signal is provided to control a time at which an electrode of the light-emitting element is initialized.

Description

CROSS-REFERENCE TO RELATED APPLICATION The present application claims priority to and the benefit of Korean Patent Application No. 10-2024-0154533, filed on Nov. 4, 2024, in the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference. BACKGROUND 1. Field Aspects of some embodiments of the present disclosure relate to a display device and an electronic device including the same. 2. Description of the Related Art With the development of information technology, the importance of display devices, which provide a connection medium between users and information, are being highlighted. Accordingly, the use of display devices such as liquid crystal display devices and organic light emitting display devices is increasing. Display devices may include a plurality of pixels. A pixel column may be connected to the same data line. In this case, when the data voltage changes rapidly, it may affect other pixel rows in which the data voltage is not written. This may cause unintended image such as mura to be 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 and therefore the information discussed in this Background section does not necessarily constitute prior art. SUMMARY Aspects of some embodiments of the present disclosure include a display device that minimizes or reduces stains and an electronic device including the same. According to some embodiments of the present disclosure, the display device 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 to supply a first sub-light emission control signal to the first sub-light emitting control line, supply a first sub-gate signal to the first sub-gate line, and supply a second sub-gate signal to the second sub-gate line; and a data driver to supply a data voltage to the data line. 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. The second sub-gate signal is provided to control a time at which an electrode of the light-emitting element is initialized. According to some embodiments, the sub-pixel may include: a first transistor to control driving current, the first transistor coupled between a first node which receives a first power supply voltage and a second node and including a gate electrode coupled 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-light emission control line; and a fourth transistor connected between a node which provides an initialization voltage and the fourth node, and including a gate electrode connected to the second sub-gate line. According to some embodiments, the light-emitting element may be connected between the fourth node and a node which receives a second power 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, during the display scan period, the gate driver may supply the second sub-gate signal for a 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, a length of the first period may be longer than a length of the second period. According to some embodiments, a length between an end time of a 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 a 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, a length of the first period may be shorter than a length of the second period. According to some embodiments, a length between an end time of a 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 a 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 longer th