US-12628518-B2 - Driver connection line having multiple resistivities and display device having the same

US12628518B2US 12628518 B2US12628518 B2US 12628518B2US-12628518-B2

Abstract

A display device includes a display area having a curved outer edge, a non-display area extended along the curved outer edge of the display area, the non-display area including a driver, a first non-display area including a first fan-out line having a first resistivity value; and a second non-display area extended along the curved outer edge of the display area and in a direction away from the first non-display area, the second non-display area including a first connection line which connects the driver to the first fan-out line, the first connection line having a second resistivity value less than the first resistivity value of the first fan-out line.

Inventors

Minchae KWAK
Byungsun KIM
Kyeonghwa KIM
Mihae KIM
Kyonghwan OH
SUMI JANG
Seunghan Jo
Jae-Ho Choi

Assignees

SAMSUNG DISPLAY CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20220308
Priority Date: 20210511

Claims (20)

1 . An electronic device comprising: a display device comprising a display area having a non-square shape and including a signal line, and a non-display area which is extended along an edge of the display area, wherein the non-display area includes: a first driver connected to the display area by the signal line; a second driver which is further from the display area than the first driver is from the display area and connected to the first driver; a first non-display area; and a second non-display area closer to the first driver than the first non-display area is to the first driver; and a first connecting line which extends from the first driver to the second driver and connects the first driver to the second driver, within the non-display area, the first connecting line comprising: a first fan-out line having a first resistivity value; a first connection line which is connected to the first fan-out line and has a second resistivity value which is less than the first resistivity value of the first fan-out line; and the first connection line including: a first portion in the first non-display area, and the first portion extending to the second non-display area to define a second portion in the second non-display area, wherein among the first fan-out line and the first connection line within the first connecting line extending from the first driver to the second driver within the non-display area, the first connection line is closer to the first driver than the first fan-out line is to the first driver, wherein the first connection line is connected to the first fan-out line through a first contact hole, and wherein among the first non-display area and the second non-display area of the non-display area, the first portion of the first connection line overlaps the first fan-out line within the first non-display area.
2 . The electronic device of claim 1 , wherein the first fan-out line includes molybdenum, and the first connection line includes aluminum and titanium.
3 . The electronic device of claim 1 , further comprising: an insulation layer defining the first contact hole in the non-display area, and the first connection line connected to the first fan-out line at the first contact hole which is in the non-display area.
4 . The electronic device of claim 1 , wherein the non-display area further includes a second connecting line which extends from the first driver to the second driver and connects the first driver to the second driver, within the non-display area, the second connection line comprising: a second fan-out line which is spaced apart from the first fan-out line and has a third resistivity value; and a second connection line which is connected to the second fan-out line, is spaced apart from the first connection line, and has a fourth resistivity value which is less than the third resistivity value of the second fan-out line, wherein among the second fan-out line and the second connection line of the second connecting line within the second connecting line extending from the first driver to the second driver, the second connection line is closer to the first driver than the second fan-out line is to the first driver.
5 . The electronic device of claim 4 , wherein the first fan-out line is provided in plural including a plurality of first fan-out lines, the second fan-out line is provided in plural including a plurality of second fan-out lines, and, the plurality of first fan-out lines and the plurality of second fan-out lines alternate with each other in a direction away from the edge of the display area.
6 . The electronic device of claim 4 , wherein the first connection line is provided in plural including a plurality of first connection the lines, second connection line is provided in plural including a plurality of second connection lines, and the plurality of first connection lines and the plurality of second connection lines alternate with each other in a direction away from the edge of the display area.
7 . The electronic device of claim 4 , wherein the second connecting line further comprises a connection pattern which is in a same layer as the first connection line, is spaced apart from the first connection line, and connects the second fan-out line and the second connection line to each other; and among the first non-display area and the second non-display area of the non-display area, the connection pattern is in the first non-display area.
8 . The electronic device of claim 7 , wherein among the first non-display area and the second non-display area of the non-display area, the first connection line is connected to the first fan-out line at the first contact hole in the first non-display area, the second fan-out line is connected to the connection pattern at a second contact hole in the first non-display area, and the connection pattern is connected to the second connection line at a third contact hole in the first non-display area.
9 . The electronic device of claim 8 , further comprising the second fan-out line, a first insulation layer, the first connection line and a second insulation layer in order toward the second connection line along a thickness direction of the display device, wherein the second contact hole extends through the first insulation layer, and the third contact hole extends through the second insulation layer.
10 . The electronic device of claim 8 , wherein the second connection line includes: a first portion in the first non-display area, and the first portion extending to the second non-display area to define a second portion in the second non-display area.
11 . The electronic device of claim 10 , wherein among the first non-display area and the second non-display area of the non-display area, the first portion of the second connection line overlaps the second fan-out line within the first non-display area.
12 . The electronic device of claim 8 , wherein among the first non-display area and the second non-display area of the non-display area, each of the first fan-out line and the second fan-out line has a length in the first non-display area, and the first contact hole and the second contact hole are spaced apart from each other and staggered in a zigzag pattern along the length of each of the first fan-out line and the second fan-out line.
13 . The electronic device of claim 4 , wherein the second driver includes a signal generating chip connected to the first connecting line and the second connecting line at the first fan-out line and the second fan-out line, respectively.
14 . The electronic device of claim 4 , wherein among layers arranged along a thickness direction of the display device: the first fan-out line and the second fan-out line are in different layers, and the first connection line and the second connection line are in different layers.
15 . The electronic device of claim 4 , wherein the first driver which is in the non-display area includes a scan circuit and a demultiplexer arranged along the edge of the display area.
16 . The electronic device of claim 15 , wherein the demultiplexer is connected to the first connection line or the second connection line.
17 . A display device comprising: a display area having a non-square shape and including a signal line; and a non-display area extended along an edge of the display area, the non-display area including: a first driver connected to the display area by the signal line; a second driver which is further from the display area than the first driver is from the display area and connected to the first driver; a first non-display area; a second non-display area closer to the first driver than the first non-display area is to the first driver; a first connecting line and a second connecting line each extending from the first driver to the second driver and connecting the first driver to the second driver, within the non-display area; the first connecting line comprising: a first fan-out line having a first resistivity value; a first connection line which is connected to the first fan-out line and has a second resistivity value which is less than the first resistivity value of the first fan-out line; and the first connection line including: a first portion in the first non-display area, and the first portion extending to the second non-display area to define a second portion in the second non-display area; and the second connecting line comprising: a second fan-out line which is spaced apart from the first fan-out line and has a second resistivity value; and a second connection line which is spaced apart from the first connection line has a fourth resistivity value less than the first resistivity value, wherein within the non-display area: among the first fan-out line and the first connection line within the first connecting line extending from the first driver to the second driver, the first connection line is closer to the first driver than the first fan-out line is to the first driver, among the second fan-out line and the second connection line within the second connecting line extending from the first driver to the second driver, the second connection line is closer to the first driver than the second fan-out line is to the first driver, the first connection line is connected to the first fan-out line through a first contact hole, and among the first non-display area and the second non-display area of the non-display area, the first portion of the first connection line overlaps the first fan-out line within the first non-display area.
18 . The display device of claim 17 , wherein the first fan-out line and the second fan-out line include molybdenum, and the first connection line and the second connection line include aluminum and titanium.
19 . The display device of claim 17 , wherein among layers arranged along a thickness direction of the display device: the first fan-out line and the second fan-out line are in different layers, and the first connection line and the second connection line are in different layers, the first fan-out line is provided in plural including a plurality of first fan-out lines, the second fan-out line is provided in plural including a plurality of second fan-out lines, the plurality of first fan-out lines and the plurality of second fan-out lines alternate with each other in a direction away from the edge of the display area, the first connection line is provided in plural including a plurality of first connection lines, the second connection line is provided in plural including a plurality of second connection lines, and the plurality of first connection lines and the plurality of second connection lines alternate with each other in the direction away from the edge of the display area.
20 . The display device of claim 17 , further comprising: an insulation layer between the second fan-out line and the first connection line and defining the first contact hole in the non-display area, and the first connection line connected to the second fan-out line at the first contact hole.

Description

This application claims priority to Korean Patent Application No. 10-2021-0060835 filed on May 11, 2021, and all the benefits accruing therefrom under 35 U.S.C. § 119, the entire disclosure of which is incorporated by reference herein. BACKGROUND 1. Field Embodiments relate to an electronic device such as a display device. 2. Description of the Related Art An electronic device such as a display device is a device that displays an image for providing visual information to outside the electronic device. Among display devices, an organic light emitting diode display has attracted attention. The display device may generally include a display substrate having a square shape. The display device may include a display area and a non-display area which is adjacent to the display area. A plurality of pixels for displaying an image and signal lines for transmitting signals to the pixels may be formed in the display area. A driver for driving the pixels, a signal generating chip, and conductive lines for connecting the driver and the signal generating chip may be formed in the non-display area. SUMMARY A demand for an electronic device such as a display device having a non-square shape is increasing. Since the non-square display device has a pixel arrangement different from that of a conventional display device, lengths of the conductive lines in a non-display area of the display device may be long. Accordingly, there is a problem in that an electrical resistance of the conductive lines increases and a width of the conductive lines increases in order to secure a sufficient scan-on time. Embodiments provide an electronic device such as a display device with improved display quality. A display device includes a substrate including a display area having a non-square shape and a non-display area including a first non-display area surrounding a portion of the display area and a second non-display area surrounding a remaining portion of the display area, a first fan-out line in the first non-display area on the substrate, and having a first resistivity value, a first connection line in a portion of the first non-display area and the second non-display area on the first fan-out line, connected to the first fan-out line through a first contact hole, and having a second resistivity value less than the first resistivity value and a driver in the non-display area and connected to the first connection line. In an embodiment, the first fan-out line may include molybdenum (“Mo”), and the first connection line may include aluminum (“Al”) and titanium (“Ti”). In an embodiment, the display device may further include an insulation layer on the first fan-out line, and the first contact hole may be in the insulation layer. In an embodiment, the first connection line may include a first portion overlapping the first fan-out line and a second portion excluding the first portion. In an embodiment, the first fan-out line may be in the first non-display area, the first portion of the first connection line may be in the first non-display area, and the second portion of the first connection line may be in the second non-display area. In an embodiment, the display device may further include a second fan-out line spaced apart from the first fan-out line on a surface of the substrate and having a third resistivity value, and a second connection line spaced apart from the first connection line, electrically connected to the second fan-out line, having a fourth resistivity value less than the third resistivity value, and connected to the driver. In an embodiment, the first fan-out line may include a plurality of first fan-out lines, the second fan-out line may include a plurality of second fan-out lines, and the first and the second fan-out lines may alternate on the surface of the substrate. In an embodiment, the first connection line may include a plurality of first connection lines, the second connection line may include a plurality of second connection lines, and the first and second connection lines may alternate on the surface of the substrate. In an embodiment, the display device may further include a connection pattern on a same layer as the first connection line, and overlapping the second fan-out line and the second connection line. In an embodiment, the second fan-out line may be connected to the connection pattern through a second contact hole, and the connection pattern may be connected to the second connection line through a third contact hole. In an embodiment, the display device may further include a first insulation layer on the second fan-out line and a second insulation layer on the first connection line, the second contact hole may be in the first insulation layer, and the third contact hole may be in the second insulation layer. In an embodiment, the second connection line may include a first portion overlapping the second fan-out line and a second portion excluding the first portion. In an embodiment, the second fan-out line may