JP-7855669-B2 - display device

JP7855669B2JP 7855669 B2JP7855669 B2JP 7855669B2JP-7855669-B2

Inventors

沈載敏
金宜俊
李根基
金羽相
嚴美喜
全敍鎰

Assignees

エルジーディスプレイカンパニーリミテッド

Dates

Publication Date: 20260508
Application Date: 20241209
Priority Date: 20231228

Claims (19)

A display area where multiple pixels are arranged to display an image, Arranged around the outer edge of the display area, a non-display area including a pad area, In the non-display area, a power short bar is located on one side of the display area, A power pad located in the aforementioned pad area, It includes a bottleneck section connecting the power supply shorting bar and the power supply pad, The power supply short bar has a mesh structure in which a plurality of first power lines extending in a first direction and a plurality of second power lines extending in a second direction are connected to each other. The aforementioned bottleneck portion is A recess formed in a concave shape toward the center line is provided on at least one side, and a pull-in portion is in contact with a part of the plurality of first power lines so that current flows in, A connecting part that connects the aforementioned retraction part and the power pad. including, Display device.
The display device according to claim 1, wherein the plurality of second power lines have different widths from each other.
The display device according to claim 2, wherein the second power line having a first separation distance from the bottleneck portion has a width smaller than the width of the second power line having a second separation distance from the bottleneck portion, and the first separation distance is smaller than the second separation distance.
The display device according to claim 2, wherein the width of the plurality of second power lines increases as they move further away from the bottleneck.
The display device according to claim 1, wherein the pull- in portion is not in contact with any of the first power lines other than the portion of the plurality of first power lines.
The plurality of first power lines include a first group that contacts the bottleneck at one end and a second group that does not contact the bottleneck at one end. The display device according to claim 1, wherein the first power line included in the second group has a width different from the width of at least one of the first power lines included in the first group.
The display device according to claim 6, wherein the first power supply line included in the second group has a width smaller than the width of at least one of the first power supply lines included in the first group.
The first power line included in the first group includes a first subgroup provided in a first region, a second subgroup provided in a second region located on one side of the first region, and a third subgroup provided in a third region located on the other side of the first region. The first power line included in the first subgroup has a width different from the width of the first power line included in the second subgroup and the third subgroup. The display device according to claim 6.
The display device according to claim 8, wherein the second subgroup includes a first power line located at the leftmost outermost ring of the first power lines included in the first group, and the third subgroup includes a first power line located at the rightmost outermost ring of the first power lines included in the first group.
The display device according to claim 8, wherein the first power supply line included in the first subgroup has a width greater than the width of the first power supply lines included in the second subgroup and the third subgroup.
The display device according to claim 8, wherein the first power lines included in the second subgroup and the third subgroup have the same width as the first power line included in the second group.
The display device according to claim 1 , wherein the intake portion is in contact with a portion of the uppermost second power line among the plurality of second power lines, and current flows in from the uppermost second power line that is in contact with it.
The display device according to claim 1 , wherein the pull-in portion includes a region in which the width decreases as it moves from the side in contact with the power supply shorting bar toward the power supply pad.
The display device according to claim 1 , wherein the recess has a curve.
The display device according to claim 1, further comprising a plurality of common power lines extending in the first direction from the display area to the non-display area, with one end connected to the power short bar.
The display area includes a transparent area through which external light passes, and an opaque area provided between adjacent transparent areas. The display device according to claim 15 , wherein each of the plurality of common power lines is arranged in the non-transparent region.
The non-transparent region further includes a light-emitting element comprising an anode electrode, a light-emitting layer, and a cathode electrode, The display device according to claim 16 , wherein the common power line supplies a power voltage to the cathode electrode of the light-emitting element.
The display device according to claim 15 , wherein each of the plurality of common power lines is connected to each of the plurality of first power lines of the power short bar.
The plurality of common power lines are provided on a different layer from the plurality of first power lines of the power short bar. The display device according to claim 18 , wherein each of the plurality of common power lines is connected to each of the plurality of first power lines of the power short bar through a contact hole.

Description

This specification relates to display devices. As the information society develops, the demand for display devices for displaying images is increasing in diverse forms. As a result, various display devices such as liquid crystal displays (LCDs), plasma display panels (PDPs), quantum dot light-emitting displays (QLEDs), and organic light-emitting displays (OLEDs) have been utilized in recent years. The display device includes two circuit boards and has multiple pixels between them to display an image. The pixels can be driven by power supplied via a power line. Because a high voltage is applied to the power line, a significant amount of heat can be generated if the current is unevenly distributed in a given area. This can lead to damage to the power line, static electricity generation between it and surrounding signal lines, and even phenomena such as rupture. This is a schematic perspective view showing a display device according to one embodiment of this specification.This is a schematic plan view showing a display panel according to one embodiment of this specification.This is a plan view showing an example of a subpixel provided in a display panel according to one embodiment of this specification.Figure 3 is a circuit diagram showing an example of a subpixel.Figure 3 is a cross-sectional view showing an example of a configuration arranged in the opaque and transparent regions.This is a schematic plan view showing a power supply shorting bar and bottleneck section according to one embodiment of this specification.This is an enlarged view of area A in Figure 6.This is a cross-sectional view showing an example of a stacked structure of power supply short bars and pixel power lines.This figure shows the current flow in a power supply short bar and bottleneck section according to one embodiment of this specification.This figure shows an example of current flow when the first power line and the second power line have a certain width.This figure shows an example of current flow in a first power line and a second power line according to one embodiment of this specification.This figure shows an example of current flow when the bottleneck entry point has a certain width.This figure shows an example of current flow in the bottleneck section according to one embodiment of this specification. Preferred embodiments of this specification will be described in detail below with reference to the attached drawings. Figure 1 is a schematic perspective view showing a display device according to one embodiment of this specification, and Figure 2 is a schematic plan view showing a display panel according to one embodiment of this specification. In the following, the X-axis represents the direction parallel to the scan lines, the Y-axis represents the direction parallel to the data lines, and the Z-axis represents the height direction of the display device 100. While the display device 100 according to one embodiment of this specification was primarily described as being composed of an Organic Light Emitting Display, it can also be composed of a Liquid Crystal Display, a Plasma Display Panel (PDP), a Quantum Dot Light Emitting Display (QLED), or an Electrophoresis Display. Referring to Figures 1 and 2, the display device 100 according to one embodiment of this specification includes a display panel 110, an integrated circuit (IC) 210, a flexible film 220, a circuit board 230, and a timing control unit 240. The display panel 110 includes a first substrate 111 and a second substrate 112 facing each other. The second substrate 112 may be a sealing substrate. The first substrate 111 may be a plastic film, a glass substrate, or a silicon wafer substrate formed using a semiconductor process. The second substrate 112 may be a plastic film, a glass substrate, or a sealing film. Such first substrates 111 and second substrates 112 may be made of transparent materials. The display panel 110 can be divided into a display area (DA) where pixels are formed and an image is displayed, and a non-display area (NDA) where no image is displayed. The display area (DA) may include a first signal line (SL1), a second signal line (SL2), and subpixels, while the non-display area (NDA) may include a pad area (PA) where pads are arranged, and at least one scan drive unit 205. The first signal line (SL1) can be extended in a first direction (e.g., the Y-axis direction) and can intersect with the second signal line (SL2) in the display area (DA). The first signal line (SL1) may include pixel power lines, data lines, and common power lines. In one embodiment, the first signal line (SL1) may further include a reference line. The pixel power line can supply a first power supply voltage to the drive transistor of each subpixel. The common power line can supply a second power supply voltage to the cathode electrode of the subpixel. Here, the second power supply voltage may be a common power supply supplied to all subpixels. The reference line can supply an init