EP-4739056-A1 - DISPLAY PANEL AND DISPLAY APPARATUS

EP4739056A1EP 4739056 A1EP4739056 A1EP 4739056A1EP-4739056-A1

Abstract

The present disclosure provides a display panel and a display apparatus and relates to the field of display technologies. The display panel includes: a display region and a non-display region disposed outside the display region, wherein the non-display region includes a step region and a non-step region, the step region includes a trace region and a function region arranged along a first direction, and a bonding pin is located in the function region; a touch electrode and a touch-signal line electrically connected to the touch electrode, wherein the touch-signal line extends from the trace region to the function region and is electrically connected to the bonding pin; and a first signal line located in the function region and configured to transmit an alternating current signal; wherein along a second direction, the first signal line at least partially overlaps with the touch control trace, the touch control trace is a part of the touch-signal line located in the function region, the first signal line and the touch control trace are isolated by a first shielding portion in a region in which the first signal line and the touch control trace overlap, the first shielding portion is configured to receive a fixed potential, and the second direction is perpendicular to a light-emitting surface of the display panel.

Inventors

LUO, Lisha
YANG, Yuehua
ZHOU, SHU
YU, Chao

Assignees

Wuhan Tianma Microelectronics Co., Ltd.

Dates

Publication Date: 20260506
Application Date: 20240919

Claims (20)

A display panel, comprising: a display region and a non-display region disposed outside the display region, wherein the non-display region comprises a step region and a non-step region, the step region comprises a trace region and a function region that are arranged along a first direction, and a bonding pin is located in the function region; a touch electrode and a touch-signal line electrically connected to the touch electrode, wherein the touch-signal line extends from the trace region to the function region and is electrically connected to the bonding pin; and a first signal line located in the function region, wherein the first signal line is configured to transmit an alternating current signal; wherein along a second direction, the first signal line at least partially overlaps with a touch control trace, the touch control trace is a part of the touch-signal line located in the function region, the first signal line and the touch control trace are isolated by a first shielding portion in a region in which the first signal line and the touch control trace overlap, the first shielding portion is configured to receive a fixed potential, and the second direction is perpendicular to a light-emitting surface of the display panel.
The display panel according to claim 1, further comprising: a power line, configured to provide a direct-current power supply to the display region, wherein in the function region, the power line is reused as the first shielding portion.
The display panel according to claim 2, further comprising: a substrate, wherein the power line and the first signal line are located on a same side of the substrate; and an organic insulating layer, wherein the organic insulating layer is in contact with the power line and is located on a side of the power line facing the substrate; wherein a plurality of through holes are provided in the power line, the plurality of through holes extends along the second direction and runs through the power line, and the plurality of through holes does not overlap with the first signal line along the second direction.
The display panel according to claim 1, wherein: in the function region, the touch control trace comprises a body portion and a first branch, the body portion is electrically connected to the touch-signal line, and two ends of the first branch are electrically connected to the body portion and the bonding pin, respectively; and a data line is located in the display region, a first fan-out line electrically connected to the data line is located in the trace region, a second fan-out line electrically connected to the first fan-out line is located in the function region, and the first branch does not overlap with the second fan-out line along the second direction.
The display panel according to claim 4, wherein the body portion does not overlap with the second fan-out line along the second direction.
The display panel according to claim 5, wherein in the function region, the body portion is located at two sides of the second fan-out line along a third direction, the first branch is located at the two sides of the second fan-out line along the third direction, and the third direction is not parallel to the first direction and is perpendicular to the second direction.
The display panel according to claim 4, wherein the body portion overlaps with the second fan-out line along the second direction, the first signal line comprises the second fan-out line, and the body portion and the second fan-out line are isolated by the first shielding portion in a region in which the body portion and the second fan-out line overlap along the second direction.
The display panel according to claim 4, further comprising: a test pin located in the function region; wherein the touch control trace further comprises a second branch located in the function region, two ends of the second branch are electrically connected to the body portion and the test pin, respectively, and the second branch does not overlap with the second fan-out line along the second direction.
The display panel according to claim 8, wherein: the non-step region comprises a gate driving circuit, the step region comprises a driving-signal fan-out line electrically connected to the gate driving circuit, and the first signal line comprises the driving-signal fan-out line; in the function region, the driving-signal fan-out line is located at two sides of the second fan-out line along a third direction, and the third direction is not parallel to the first direction and is perpendicular to the second direction; and in the function region, the driving-signal fan-out line at least partially overlaps with the second branch along the second direction, and the driving-signal fan-out line and the second branch are isolated by the first shielding portion in a region in which the driving-signal fan-out line and the second branch overlap along the second direction.
The display panel according to claim 4, further comprising: a test pin located in the function region and located on a side of the bonding pin away from the first branch; wherein the touch control trace further comprises an extension portion located in the function region, and two ends of the extension portion are electrically connected to the bonding pin and the test pin, respectively.
The display panel according to claim 1, wherein: a test pin is located in the function region; in the function region, the touch control trace comprises a body portion, a first branch, and a second branch, wherein the body portion is electrically connected to the touch signal line, two ends of the first branch are electrically connected to the body portion and the bonding pin, respectively, and two ends of the second branch are electrically connected to the body portion and the test pin, respectively; and the body portion, the first branch, and the second branch each overlaps with the first shielding portion along the second direction.
The display panel according to claim 1, wherein: a test pin is located in the function region; the touch control trace comprises a trunk line, a first branch line, and a second branch line, wherein the trunk line is electrically connected to the touch signal line, the first branch line is electrically connected between the trunk line and the bonding pin, and the second branch line is electrically connected between the trunk line and the test pin; and the first branch line and the trunk line are disposed in a same layer, the second branch line and the trunk line are disposed in different layers and are electrically connected to each other through a first via, and the first branch line and the second branch line extend along different directions.
The display panel according to claim 12, wherein the trunk lines extend along the first direction and are arranged along a third direction, and the first branch lines extend along the first direction and are arranged along the third direction, the second branch lines extend along the third direction and are arranged along the first direction, and the first direction is not parallel to the third direction; a first center line of the function region extends along the first direction; at a side of the first center line, along a direction parallel to the third direction and pointing from the first center line to an edge of the display panel, lengths of the trunk lines gradually decrease, lengths of the plurality of first branch lines gradually increase, and each first via is located the respective trunk line and the respective first branch line that are connected.
The display panel according to claim 13, wherein the first branch lines overlap with the second branch lines along the second direction; the display panel further comprises second shielding portions located between the first branch lines and the second branch lines along the second direction; and the second shielding portions are configured to receive a fixed potential.
The display panel according to claim 14, wherein the second shielding portions extend along the first direction and are arranged along the third direction; and the second shielding portions and the second branch lines overlap along the second direction in one-to-one correspondence.
The display panel according to claim 15, wherein each of the second shielding portions comprises a first end and a second end that are opposite to each other along the first direction, the first ends of the second shielding portions are electrically connected to each other, and the second ends of the second shielding portions are electrically connected to each other.
The display panel according to claim 14, further comprising: a power line, configured to provide a direct-current power supply to the display region; wherein the second shielding portions are electrically connected to the power line.
The display panel according to claim 14, further comprising: a substrate and a plurality of metal layers disposed on a side of the substrate, wherein every pair of the metal layers adjacent along the second direction are isolated by an insulating layer; wherein: the metal layers comprise a first metal layer, a second metal layer, a third metal layer, a first touch metal layer, and a second touch metal layer, which are arranged according to the above-listed sequence along a direction from the substrate to the light-emitting surface of the display panel; and in the function region, the trunk lines and the first branch lines are located in the second touch metal layer, the second branch lines are located in the third metal layer, the second shielding portions are located in the first touch metal layer, the first shielding portion is located in the second metal layer, and the first signal line is located on a side of the first shielding portion facing the substrate.
The display panel according to claim 14, further comprising: a substrate and a plurality of metal layers disposed on a side of the substrate, wherein every pair of the metal layers adjacent along the second direction are isolated by an insulating layer; wherein: the metal layers comprise a first metal layer, a second metal layer, a third metal layer, a fourth metal layer, a first touch metal layer, and a second touch metal layer, which are arranged according to the above-listed sequence along a direction from the substrate to the light-emitting surface of the display panel; and in the function region, the trunk lines and the first branch lines are located in the second touch metal layer, the second branch lines are located in the third metal layer, the second shielding portions are located in the fourth metal layer, the first shielding portion is located in the second metal layer, and the first signal line is located on a side of the first shielding portion facing the substrate.
The display panel according to claim 14, further comprising: a substrate and a plurality of metal layers disposed on a side of the substrate, wherein every pair of the metal layers adjacent along the second direction are isolated by an insulating layer; wherein: the metal layers comprise a first metal layer, a second metal layer, a third metal layer, a first touch metal layer, and a second touch metal layer, which are arranged according to the above-listed sequence along a direction from the substrate to the light-emitting surface of the display panel; the first branch lines are located in the second touch metal layer, and the second branch lines are located in the third metal layer; the function region comprises a jumper-wire region in which the first branch lines and the second branch lines overlap, and in the jumper-wire region, a distance between the substrate and the insulating layer at a surface of the first branch lines facing the substrate is H1; the function region comprises a first region adjacent to the jumper-wire region, and in the first region, a distance between the substrate and the insulating layer at the surface of the first branch lines facing the substrate is H2; H 1 < H 2 ; and the insulating layer at the surface of the first branch lines facing the substrate comprises a slope at a junction between the jumper-wire region and the first region, and the slope rises along a direction from the jumper-wire region to the first region; and the first branch lines extend into the first region through the slope.

Description

The present application claims priority to Chinese Patent Application No. 202411204925.8, titled "DISPLAY PANEL AND DISPLAY APPARATUS", filed before China National Intellectual Property Administration on August 29, 2024, the entireties of which are incorporated herein by reference. TECHNICAL FIELD The present disclosure relates to the field of display technologies, and in particular, to a display panel and a display apparatus. BACKGROUND With the continuous development of science and technology, an increasing number of display products, such as mobile phones, tablet computers, notebook computers, and smart wearable devices, have been widely used in people's daily life and work, bringing great convenience to people's daily life and work and becoming indispensable important tools for people nowadays. For a display product with a touch control function, how to reduce or avoid the interference of other signals in the display product on a touch control signal and improve the touch control accuracy has become one of the technical problems to be urgently solved at the present stage. SUMMARY In order to solve the above-mentioned technical problems, the present disclosure provides a display panel and a display apparatus, aiming to reduce or avoid the interference of other signals in the display panel on a touch control signal and improve the touch control accuracy. In a first aspect, embodiments of the present disclosure provide a display panel, including: a display region and a non-display region disposed outside the display region, where the non-display region comprises a step region and a non-step region, the step region comprises a trace region and a function region that are arranged along a first direction, and a bonding pin is located in the function region; a touch electrode and a touch-signal line electrically connected to the touch electrode, where the touch-signal line extends from the trace region to the function region and is electrically connected to the bonding pin; and a first signal line located in the function region, wherein the first signal line is configured to transmit an alternating current signal; where along a second direction, the first signal line at least partially overlaps with a touch control trace, the touch control trace is a part of the touch-signal line located in the function region, the first signal line and the touch control trace are isolated by a first shielding portion in a region in which the first signal line and the touch control trace overlap, the first shielding portion is configured to receive a fixed potential, and the second direction is perpendicular to a light-emitting surface of the display panel. In a second aspect, based on the same inventive concept, embodiments of the present disclosure further provide a display apparatus, including the display panel provided in the first aspect of the present disclosure. Compared with the related art, the technical solutions provided by the embodiments of the present disclosure have the following advantages: In the display panel and the display apparatus provided by the present disclosure, the touch-signal line connected to the touch electrode extends to the function region and is electrically connected to the bonding pin in the function region. In addition to the touch-signal line, some other signal lines in the display panel (such as the first signal line mentioned in the present disclosure) may also be led to the function region and are electrically connected to other bonding pins in the function region. Where the first signal line includes a signal line for transmitting an alternating current signal in the function region, for example, a signal line for transmitting a data signal, a signal line for transmitting a clock signal, etc. The signals transmitted by these signal lines are not constant direct current signals but alternating current signals with abrupt transitions. In the function region, due to the dense wiring, the touch control trace and the first signal line may overlap each other. Since the signal transmitted on the first signal line is an alternating current signal, when the signal on the first signal line changes abruptly, a signal on the touch control trace may also change abruptly due to the coupling effect, which can affect the accuracy of a touch control signal transmitted on the touch control trace and the touch control accuracy. Therefore, in the present disclosure, the first shielding portion is provided in the overlapping region of the first signal line and the touch control trace. A signal on the first shielding portion is the fixed potential. With the first shielding portion, the signal coupling between the first signal line and the touch control trace can be shielded, which is beneficial to reducing or avoiding the influence of the abrupt signal change on the first signal line on the touch signal on the touch control trace, and in turn is beneficial to improving the touch control accuracy. BRIEF DESC