KR-20260065604-A - DISPLAY DEVICE

Abstract

A display device according to one embodiment of the present invention comprises a substrate including a display area and a non-display area, an external common voltage line located in the non-display area and a plurality of pixels located in the display area, and first common voltage lines connected to one end of the external common voltage line, wherein the other end of the external common voltage line is branched into a first external common voltage line and a second external common voltage line, and includes a groove located between the second external common voltage line and the first common voltage line.

Inventors

• 김태훈
• 곽원규

Assignees

• 삼성디스플레이 주식회사

Dates

Publication Date

20260508

Application Date

20260423

Claims (20)

1. A substrate including a display area and a non-display area; A first common voltage line having at least a portion located in the above-mentioned display area; An external common voltage line located in the above-mentioned non-display area; and It includes a first external common voltage sub-line and a second external common voltage sub-line protruding from the above external common voltage line, and The above external common voltage line is electrically connected to the above first common voltage line and includes a first region, a second region and a third region, and The second region is located between the first region and the third region, and is located between the second external common voltage sub-line and the first common voltage line, and The above external common voltage line is a display device located surrounding the above display area.
2. In paragraph 1, A display device in which the length direction of the second external common voltage sub-line is perpendicular to the width direction of the second region.
3. In paragraph 1, A display device in which the shortest path between the first common voltage line and the first external common voltage sub-line is shorter than the shortest path between the first common voltage line and the second external common voltage sub-line.
4. In paragraph 1, A plurality of pixels located in the above display area; and A display device further comprising an external initialization voltage line located between the above external common voltage line and the above display area, and electrically connected to at least some pixels.
5. In paragraph 1, A plurality of pixels located in the above display area; A driving voltage line having at least a portion located in the above-mentioned display area; and A display device further comprising an external driving voltage line located in the above-mentioned non-display area, located between the first and second ends of the external common voltage line, insulated from the external common voltage line, and electrically connected to at least some pixels through the driving voltage line.
6. In paragraph 5, The above external common voltage line includes a first part, a second part, a third part, a fourth part and a fifth part, and The first part and the second part face each other in the first direction, The above third part faces the above fourth part and the above fifth part in the second direction, respectively, The above first direction is different from the above second direction, and The above display area is located between the first part and the second part in the above first direction, and The above display area is a display device located between the third part, the fourth part, and the fifth part in the above second direction.
7. In paragraph 6, A display device in which some of the above-mentioned multiple pixels overlap with the first common voltage line and do not overlap with the driving voltage line.
8. In Paragraph 7, A display device further comprising a second common voltage line electrically connected to the first common voltage line and positioned intersecting the first common voltage line.
9. In paragraph 6, The above first common voltage line is located between the first pixel group and the second pixel group, and A display device in which the length direction of the first common voltage line is parallel to the length direction of the driving voltage line.
10. In Paragraph 9, A display device further comprising a second common voltage line electrically connected to the first common voltage line and positioned intersecting the first common voltage line.
11. In paragraph 5, The above external common voltage line includes a first part and a second part, and The above second part faces the above first part, and The two mutually facing sides of the above-mentioned display area are a display device located between the first part and the second part.
12. In Paragraph 11, A display device in which some of the above-mentioned multiple pixels overlap with the first common voltage line and do not overlap with the driving voltage line.
13. In Paragraph 12, A display device further comprising a second common voltage line electrically connected to the first common voltage line and positioned intersecting the first common voltage line.
14. In Paragraph 11, The above first common voltage line is located between the first pixel group and the second pixel group, and A display device in which the length direction of the first common voltage line is parallel to the length direction of the driving voltage line.
15. In Paragraph 14, A display device further comprising a second common voltage line electrically connected to the first common voltage line and positioned intersecting the first common voltage line.
16. A substrate including a display area and a non-display area; A first common voltage line having at least a portion located in the above-mentioned display area; A first external common voltage line located in the above-mentioned non-display area and electrically connected to the first common voltage line; A second external common voltage line located in the above-mentioned non-display area and spaced apart from the first external common voltage line in at least a first direction, and which transmits the same voltage as the first external common voltage line when the display device operates; A first external common voltage sub-line protruding in a second direction from the first external common voltage line; and It includes a second external common voltage sub-line protruding from the second external common voltage line, and The above second direction is a display device different from the above first direction.
17. In Paragraph 16, A display device in which the length direction of the first external common voltage sub-line, the length direction of the second external common voltage sub-line, and the length direction of the first common voltage line are each perpendicular to the first direction.
18. In Paragraph 16, The first side of the first external common voltage line faces the first side of the second external common voltage line in the first direction, and The second side of the first external common voltage line is a display device facing the second side of the second external common voltage line in the second direction.
19. In Paragraph 16, A display device in which the total number of common voltage lines directly connected to the first external common voltage line is greater than the total number of common voltage lines directly connected to the second external common voltage line.
20. In Paragraph 17, A plurality of pixels located in the above display area; and A display device further comprising an external initialization voltage line located between the second external common voltage line and the display area and electrically connected to at least some pixels.

Description

Display Device The present disclosure relates to a display device, and more specifically, to a display device that prevents heat generation of wiring located in a non-display area. A display device is a device that displays images, and recently, light-emitting diode displays are attracting attention as self-luminous display devices. Light-emitting display devices possess self-luminous properties and, unlike liquid crystal display devices, do not require a separate light source, allowing for reduced thickness and weight. Furthermore, light-emitting display devices exhibit high-quality characteristics such as low power consumption, high brightness, and high response speed. Generally, a light-emitting display device comprises a substrate, a plurality of thin-film transistors located on the substrate, a plurality of insulating layers disposed between wirings constituting the thin-film transistors, and a light-emitting element connected to the thin-film transistors, wherein the light-emitting element may be, for example, an organic light-emitting element. Meanwhile, as the bezel of a display device becomes thinner, the user's gaze may be fixed or focused on the image (or the screen of the display device). Recently, research and development have been conducted on front display technology that eliminates the bezel on the front of the display device and displays an image across the entire front of the device. In order to minimize the bezel in this way, as the non-display area becomes narrower, a large amount of current flows through the wiring located in the non-display area. FIG. 1 illustrates a display device according to one embodiment of the present invention. Figure 2 illustrates the current flow in a display device in which the external common voltage line does not include a groove. Figure 3 briefly illustrates the flow of current in a display device according to the embodiment of Figure 1. FIG. 4 shows the same location as area A of FIG. 1 in a display device according to another embodiment. FIG. 5 shows the same location as area A of FIG. 1 in a display device according to another embodiment of the present invention. FIG. 6 illustrates a display device according to an embodiment of the present invention, comprising an external common voltage line, an external driving voltage line, and an external initialization voltage line. FIG. 7 illustrates the same location as FIG. 6 for a display device according to another embodiment. FIG. 8 shows the same location as FIG. 6 for a display device according to another embodiment. FIG. 9 illustrates the same location as FIG. 6 for a display device according to another embodiment. FIG. 10 illustrates the same location as FIG. 7 for a display device according to another embodiment. FIG. 11 shows the same location as FIG. 8 for a display device according to another embodiment. FIG. 12 illustrates a display area (DA) in a display device according to one embodiment of the present invention. FIG. 13 illustrates a display area (DA) in a display device according to one embodiment of the present invention. FIG. 14 illustrates a display area (DA) in a display device according to one embodiment of the present invention. FIG. 15 illustrates a display area (DA) in a display device according to one embodiment of the present invention. FIG. 16 briefly illustrates the arrangement of the driving voltage connection line, the driving voltage line, and the first common voltage line within the display area. FIG. 17 briefly illustrates the arrangement of a driving voltage connection line, a driving voltage line, a first common voltage line, and a second common voltage line within a display area in a display device according to another embodiment. FIG. 18 briefly illustrates the arrangement of a driving voltage connection line, a driving voltage line, and a first common voltage line within a display area in a display device according to another embodiment. FIG. 19 briefly illustrates the arrangement of a driving voltage connection line, a driving voltage line, a first common voltage line, and a second common voltage line within a display area in a display device according to another embodiment. FIG. 20 is an equivalent circuit diagram of a pixel of a light-emitting display device according to one embodiment. FIG. 21 is a layout diagram of a pixel area of an organic light-emitting display device according to one embodiment. FIG. 22 is a cross-sectional view taken along the line XXII-XXII' in FIG. 21. FIG. 23 is a diagram showing the arrangement of pixel areas of a display device according to another embodiment. Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts unrelated to the e