US-12621932-B2 - Display panel including signal pads with varying dimensions

US12621932B2US 12621932 B2US12621932 B2US 12621932B2US-12621932-B2

Abstract

A display panel includes: a display substrate including a display area and a pad area spaced apart from a side of the display area in a first direction; and first to (n)th signal pads (where n is an integer of 2 or more) in the pad area on the display substrate, extending in the first direction, and spaced apart from each other in a second direction perpendicular to the first direction, wherein a (k)th signal pad among the first to (n)th signal pads (where k is an integer between 1 and n) is between the first signal pad and the (n)th signal pad, wherein a length of each of (k)th to (n)th signal pads among the first to (n)th signal pads along the first direction gradually increases, and wherein a width of each of the (k)th to (n)th signal pads along the second direction gradually decreases.

Inventors

Dong Hee Shin
Sunkwun SON
Nahyeon CHA

Assignees

SAMSUNG DISPLAY CO., LTD.

Dates

Publication Date: 20260505
Application Date: 20210618
Priority Date: 20200821

Claims (16)

1 . A display panel comprising: a display substrate including a display area and a pad area spaced apart from a side of the display area in a first direction; and first to (n)th signal pads (where n is an integer of 3 or more) immediately adjacent to each other in sequence in the pad area on the display substrate, each extending in the first direction, and spaced apart from each other in a second direction perpendicular to the first direction, wherein a (k)th signal pad among the first to (n)th signal pads (where k is an integer between 1 and n) is between the first signal pad and the (n) th signal pad, wherein a length of each of (k)th to (n)th signal pads among the first to (n)th signal pads along the first direction gradually increases in the first direction and signal pads from among the (k)th to (n)th signal pads that have different lengths in the first direction each extend parallel to each other, wherein a width of each of the (k)th to (n)th signal pads along the second direction gradually decreases, wherein each of the first to (n)th signal pads includes a first end adjacent to the side of the display area and a second end opposite to the first end, wherein a distance in the first direction between the side of the display area and a first end of each of the (k)th to (n)th signal pads gradually decreases, wherein the display substrate further includes a fan-out area between the side of the display area and the pad area, wherein the display panel further includes: first to (n)th signal lines in the display area on the display substrate; and first to (n)th fan-out lines in the fan-out area on the display substrate and connecting the first to (n)th signal pads and corresponding ones of the first to (n)th signal lines, respectively, and wherein the first to (n)th fan-out lines have a same length as each other.
2 . The display panel of claim 1 , wherein the first to (n)th signal pads are spaced apart from each other by a same distance in the second direction.
3 . The display panel of claim 1 , wherein the first to (n)th signal pads have a same area in a plan view.
4 . The display panel of claim 1 , wherein a first reference line connecting first ends of first to (k−1) th signal pads among the first to (n)th signal pads and a second reference line connecting first ends of the (k) to (n)th signal pads are defined, wherein each of the first and second reference lines extends in a diagonal direction with respect to the second direction, and wherein the first and second reference lines are symmetrical to each other.
5 . The display panel of claim 1 , wherein a third reference line connecting second ends of the first to (n)th signal pads is defined, wherein the third reference line is parallel to the second direction.
6 . The display panel of claim 1 , wherein distances in the first direction between the side of the display area and second ends of the (k)th to (n)th signal pads are the same as each other.
7 . The display panel of claim 1 , wherein a (k)th fan-out line among the first to (n)th fan-out lines connects the (k)th signal pad and a (k)th signal line among the first to (n)th signal lines.
8 . The display panel of claim 7 , wherein each of the (k)th signal pad, the (k)th fan-out line, and the (k) th signal line extends in the first direction.
9 . The display panel of claim 7 , wherein each of the (n)th signal pad and the (n)th signal line extends in the first direction, wherein the (n)th fan-out line extends in a diagonal direction with respect to the first direction.
10 . The display panel of claim 7 , wherein an end of each of the first to (n)th fan-out lines contacts a corresponding one of the first to (n)th signal pads, wherein another end of each of the first to (n)th fan-out lines contacts a corresponding one of the first to (n)th signal lines, wherein a distance in the first direction between the side of the display area and the end of each of (k)th to (n)th fan-out lines among the first to (n)th fan-out lines gradually decreases.
11 . The display panel of claim 1 , further comprising at least one power pad in the pad area on the display substrate and spaced apart from the (n)th signal pad in the second direction.
12 . The display panel of claim 11 , wherein a length of the power pad in the first direction is the same as a length of the (n)th signal pad in the first direction.
13 . The display panel of claim 11 , wherein a width of the power pad in the second direction is the same as a width of the (n)th signal pad in the second direction.
14 . A display panel comprising: a display substrate including a display area and a plurality of pad areas spaced apart from a side of the display area in a first direction and arranged in a second direction perpendicular to the first direction; and a plurality of pad portions in corresponding ones of the plurality of pad areas on the display substrate, respectively, wherein each of the plurality of pad portions includes first to (n)th signal pads (where n is an integer of 3 or more) immediately adjacent to each other in sequence, each extending in the first direction, and spaced apart from each other in the second direction, wherein a (k)th signal pad among the first to (n)th signal pads (where k is an integer between 1 and n) is between the first signal pad and the (n)th signal pad, wherein a length of each of (k)th to (n)th signal pads among the first to (n)th signal pads along the first direction gradually increases in the first direction and signal pads from among the (k)th to (n)th signal pads that have different lengths in the first direction each extend parallel to each other, wherein a width of each of the (k)th to (n)th signal pads along the second direction gradually decreases, wherein each of the first to (n)th signal pads includes a first end adjacent to the side of the display area and a second end opposite to the first end, and wherein a distance in the first direction between the side of the display area and a first end of each of the (k)th to (n)th signal pads gradually decreases, wherein the display substrate further includes a plurality of fan-out areas between the side of the display area and the plurality of pad areas, wherein the display panel further includes: first to (n)th signal lines in the display area on the display substrate; and first to (n)th fan-out lines in each of the plurality of fan-out areas on the display substrate and connecting the first to (n)th signal pads and corresponding ones of the first to (n)th signal lines, respectively, and wherein the first to (n)th fan-out lines have a same length as each other.
15 . The display panel of claim 14 , wherein the first to (n)th signal pads included in each of the plurality of pad portions are spaced apart from each other by a same distance in the second direction.
16 . The display panel of claim 14 , wherein the first to (n)th signal pads included in each of the plurality of pad portions have a same area in a plan view.

Description

CROSS-REFERENCE TO RELATED APPLICATION The present application claims priority to and the benefit of Korean Patent Application No. 10-2020-0105447, filed on Aug. 21, 2020, in the Korean Intellectual Property Office, the entire content of which is hereby incorporated by reference. BACKGROUND 1. Field Aspects of some example embodiments of the present inventive concept relate to a display panel. 2. Description of Related Art Recently, flat panel display devices such as liquid crystal display devices, organic light emitting display devices, etc., have been widely used. A display device may include pixels located in a display area and signal lines located in the display area and connected to the pixels. Also, the display device may further include signal pads and fan-out lines located around the display area and transmitting a signal and/or a voltage generated from the driving integrated circuit to the signal lines. In order to implement a relatively narrow bezel, a width of the fan-out area in which the fan-out lines are may also be relatively narrow. However, as the number of fan-out lines connected to one driving integrated circuit increases, and as the number of driving integrated circuits used in a display panel increases due to large display devices, limits may be placed on the amount that the width of the fan-out area can be reduced. The above information disclosed in this Background section is only for understanding of the background of the inventive concepts, and, therefore, it may contain information that does not constitute prior art. SUMMARY Aspects of some example embodiments of the present inventive concept relate to a display panel. For example, some embodiments of the present inventive concept relate to the display panel and a display device including the same. Aspects of some embodiments of the present inventive concept include a display panel with relatively reduced dead space. Aspects of some example embodiments of the present inventive concept also include a display panel in which contact failure between signal pads and signal terminals is relatively reduced. Aspects of some example embodiments of the present inventive concept include a display device with relatively reduced dead space. Additional features of the inventive concepts will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the inventive concepts. A display panel according to some embodiments may include a display substrate including a display area and a pad area spaced apart from a side of the display area in a first direction, and first to (n)th signal pads (where n is an integer of 2 or more) located in the pad area on the display substrate, extending in the first direction, and spaced apart from each other in a second direction perpendicular to the first direction. A (k)th signal pad among the first to (n)th signal pads (where k is an integer between 1 and n) is located between the first signal pad and the (n)th signal pad. A length of each of (k)th to (n)th signal pads among the first to (n)th signal pads in the first direction gradually increases. A width of each of the (k)th to (n)th signal pads in the second direction gradually decreases. According to some embodiments, the first to (n)th signal pads are spaced apart from each other by a same distance in the second direction. According to some embodiments, areas of the first to (n)th signal pads are the same as each other in a plan view. According to some embodiments, each of the first to (n)th signal pads includes a first end adjacent to the side of the display area and a second end opposite to the first end. According to some embodiments, a first reference line connecting first ends of first to (k-1)th signal pads among the first to (n)th signal pads and a second reference line connecting first ends of the (k) to (n)th signal pads are defined. Each of the first and second reference lines extends in a diagonal direction with respect to the second direction. The first and second reference lines are symmetrical to each other. According to some embodiments, a third reference line connecting second ends of the first to (n)th signal pads is defined. The third reference line is parallel to the second direction. According to some embodiments, a distance in the first direction between the side of the display area and a first end of each of the (k)th to (n)th signal pads gradually decreases. According to some embodiments, distances in the first direction between the side of the display area and second ends of the (k)th to (n)th signal pads are the same as each other. According to some embodiments, the display substrate further includes a fan-out area positioned between the side of the display area and the pad area. The display panel further includes first to (n)th signal lines located in the display area on the display substrate, and first to (n)th fan-out lines in the fan-out area on the display subs