KR-20260067440-A - DISPLAY DEVICE AND ELECTRONIC DEVICE INCLUDING SAME

KR20260067440AKR 20260067440 AKR20260067440 AKR 20260067440AKR-20260067440-A

Abstract

A display device according to embodiments of the present invention comprises a subpixel including a light-emitting element connected to a data line, a first sub-luminance control line, a first sub-gate line, and a second sub-gate line, a gate driver that supplies a first sub-luminance control signal to the first sub-luminance control line and supplies 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 that supplies a data voltage to the data line, wherein the length of the period during which the second sub-gate signal is supplied during a display scan period is different from the length of the period during which the second sub-gate signal is supplied during a self-scan period, and the second sub-gate signal can control the timing of initializing one electrode of the light-emitting element.

Inventors

김병철
허준
이상명
권오철
송병관
엄기명
이재훈
차기석
강상현
김판주

Assignees

삼성디스플레이 주식회사

Dates

Publication Date: 20260513
Application Date: 20241104

Claims (20)

A subpixel connected to a data line, a first sub-luminescent control line, a first sub-gate line, and a second sub-gate line, and including a light-emitting element; A gate driver that supplies a first sub-luminescence control signal to the first sub-luminescence control line and supplies a first sub-gate signal to the first sub-gate line and a second sub-gate signal to the second sub-gate line; and It includes a data driver that supplies data voltage to the above data line, and The length of the period during which the second sub-gate signal is supplied during the display scan section is different from the length of the period during which the second sub-gate signal is supplied during the self scan section, and The above second sub-gate signal is a display device that controls the timing of initializing one electrode of the light-emitting element.
In Article 1, The above subpixel is: A first transistor that generates a driving current, including a gate electrode connected between a first node and a second node receiving a first power supply voltage and connected to a third node; A second transistor including a gate electrode connected between the data line and the third node and connected to the first sub-gate line; A third transistor comprising a gate electrode connected between the second and fourth nodes and connected to the first sub-luminescence control line; and It includes a fourth transistor comprising a gate electrode connected between a node providing an initialization voltage and the fourth node, and connected to the second sub-gate line, and The light-emitting element is a display device connected between the fourth node and the node receiving the second power supply voltage.
In Article 2, A display device in which the data voltage is written to the subpixel during the display scan period, and the data voltage is not written to the subpixel during the self scan period.
In Paragraph 3, During the above display scan interval, the gate driver supplies the second sub-gate signal during the first period, and During the self-scan section, the gate driver is a display device that supplies the second sub-gate signal during the second period.
In Article 4, A display device in which the length of the first period is longer than the length of the second period.
In Article 5, A display device in which the length between the end point of a non-luminous period including the first period and the end point of the first period is the same as the length between the end point of a non-luminous period including the second period and the end point of the second period.
In Article 6, A display device in which the length between the start point of the non-luminous period including the first period and the start point of the first period is shorter than the length between the start point of the non-luminous period including the second period and the start point of the second period.
In Article 4, A display device in which the length of the first period is shorter than the length of the second period.
In Article 8, A display device in which the length between the end point of a non-luminous period including the first period and the end point of the first period is the same as the length between the end point of a non-luminous period including the second period and the end point of the second period.
In Article 9, A display device in which the length between the start point of the non-luminous period including the first period and the start point of the first period is longer than the length between the start point of the non-luminous period including the second period and the start point of the second period.
In Article 5, The above subpixel is: A fifth transistor comprising a gate electrode connected between a node receiving the first power supply voltage and the first node, and connected to a second sub-luminescent control line; and It further includes a sixth transistor comprising a gate electrode connected between a node receiving a reference voltage and the third node, and connected to a third sub-gate line, and A display device in which the gate driver supplies a second sub-luminescence control signal to the second sub-luminescence control line and supplies a third sub-gate signal to the third sub-gate line.
A subpixel connected to a data line, a first sub-luminescent control line, a first sub-gate line, and a second sub-gate line, and including a light-emitting element; A gate driver that supplies a first sub-luminescence control signal to the first sub-luminescence control line and supplies a first sub-gate signal to the first sub-gate line and a second sub-gate signal to the second sub-gate line; and It includes a data driver that supplies data voltage to the above data line, and The number of times the second sub-gate signal is supplied during the display scan period and the number of times the second sub-gate signal is supplied during the self scan period are different, and The above second sub-gate signal is a display device that controls the timing of initializing one electrode of the light-emitting element.
In Article 12, The above subpixel is: A first transistor that generates a driving current, including a gate electrode connected between a first node and a second node receiving a first power supply voltage and connected to a third node; A second transistor including a gate electrode connected between the data line and the third node and connected to the first sub-gate line; A third transistor comprising a gate electrode connected between the second and fourth nodes and connected to the first sub-luminescence control line; and It includes a fourth transistor that includes a gate electrode connected between a node providing an initialization voltage and the fourth node, and connected to the second sub-gate line. The light-emitting element is a display device connected between the fourth node and the node receiving the second power supply voltage.
In Article 13, A display device in which the data voltage is written to the subpixel during the display scan period, and the data voltage is not written to the subpixel during the self scan period.
In Article 14, A display device in which the number of times the gate driver supplies the second sub-gate signal during the display scan period is less than the number of times the gate driver supplies the second sub-gate signal during the self scan period.
In Article 14, A display device in which the number of toggles of the second sub-gate signal during the display scan period is smaller than the number of toggles of the second sub-gate signal during the self scan period.
In Article 16, A display device in which the number of toggles above is the number of times the logic level of the second sub-gate signal changes.
In Article 14, A display device in which the number of times the gate driver supplies the second sub-gate signal during the display scan period is greater than the number of times the gate driver supplies the second sub-gate signal during the self-scan period.
In Article 14, A display device in which the number of toggles of the second sub-gate signal during the display scan period is greater than the number of toggles of the second sub-gate signal during the self scan period.
In Article 15, The above subpixel is: A fifth transistor comprising a gate electrode connected between a node receiving the first power supply voltage and the first node, and connected to a second sub-luminescent control line; and It further includes a sixth transistor comprising a gate electrode connected between a node receiving a reference voltage and the third node, and connected to a third sub-gate line, and A display device in which the gate driver supplies a second sub-luminescence control signal to the second sub-luminescence control line and supplies a third sub-gate signal to the third sub-gate line.

Description

Display device and electronic device including the same The present invention relates to a display device and an electronic device including the same. With the advancement of information technology, the importance of display devices, which serve as a medium connecting users and information, is being highlighted. In response to this, the use of display devices such as Liquid Crystal Displays (LCDs) and Organic Light Emitting Displays (OLEDs) is increasing. A display device may include multiple pixels. A row of pixels may be connected to the same data line. Furthermore, if the data voltage changes abruptly, it may affect other rows of pixels where data voltage is not being written. As a result, mura may occur in some areas of the display panel. Figure 1 is a block diagram showing an example of a display device. FIG. 2 is a block diagram showing an example of any one of the subpixels of FIG. 1. Figure 3 is a circuit diagram showing an example of a subpixel of Figure 2. FIG. 4 is a conceptual diagram for explaining the driving operation of the display device of FIG. 1. Figure 5 is a timing diagram showing an example of the display device of Figure 1 performing a display scan operation. Figure 6 is a timing diagram showing an example of the display device of Figure 1 performing a self-scan operation. Figure 7 is a diagram illustrating the phenomenon in which a pattern displayed in some areas of a display panel is copied and displayed in other areas. FIGS. 8 to 11 are timing diagrams showing examples of a third sub-gate signal supplied to a display scan section and a self scan section. FIG. 12 is a block diagram showing an electronic device according to embodiments of the present invention. FIG. 13 is a diagram showing an example in which the electronic device of FIG. 12 is implemented as a smartphone. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the following description, only the parts necessary for understanding the operation according to the present invention are described, and the description of other parts is omitted to avoid obscuring the gist of the present invention. Furthermore, the present invention is not limited to the embodiments described herein and may be embodied in other forms. However, the embodiments described herein are provided merely to explain in detail sufficient for a person skilled in the art to easily implement the technical concept of the present invention. Throughout the specification, when a part is described as being "connected" to another part, this includes not only cases where they are "directly connected," but also cases where they are "indirectly connected" with other elements interposed between them. The terms used herein are intended to describe specific embodiments and are not intended to limit the invention. Throughout the specification, when a part is described as "comprising" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. "At least one of X, Y, and Z" and "at least one selected from the group consisting of X, Y, and Z" may be interpreted as one X, one Y, one Z, or any combination of two or more of X, Y, and Z (e.g., XYZ, XYY, YZ, ZZ). Here, "and/or" includes all combinations of one or more of such components. Herein, terms such as first, second, etc. may be used to describe various components, but these components are not limited to these terms. These terms are used to distinguish one component from another. Accordingly, the first component may refer to the second component without departing from what is disclosed herein. Spatially relative terms, such as "below" and "above," may be used for descriptive purposes to explain the relationship between one element or feature and other element(s) or feature(s) as depicted in the drawings. Spatially relative terms are intended to include different directions during use, operation, and/or manufacturing in addition to the directions depicted in the drawings. For example, if the device depicted in the drawings is inverted, elements described as being located "below" other elements or features are located in the direction "above" of other elements or features. Thus, in one embodiment, the term "below" may include both directions of up and down. Furthermore, the device may face other directions (e.g., rotated 90 degrees or in other directions), and accordingly, the spatially relative terms used herein are interpreted accordingly. Various embodiments are described with reference to drawings illustrating ideal embodiments. Accordingly, it will be expected that the shapes may vary, for example, depending on tolerances and/or manufacturing techniques. Therefore, the embodiments disclosed herein should not be interpreted as being limited to the specific shapes depicted, but should be interpreted to include, for