Display panel and display apparatus
The display panel design with signal lines and protrusions addresses the fragility of flexible AMOLED displays by enhancing structural integrity and bendability, reducing crack defects and ensuring reliability.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- BOE TECHNOLOGY GROUP CO LTD
- Filing Date
- 2024-11-29
- Publication Date
- 2026-06-04
Smart Images

Figure CN2024135462_04062026_PF_FP_ABST
Abstract
Description
DISPLAY PANEL AND DISPLAY APPARATUSTECHNICAL FIELD
[0001] The present invention relates to display technology, more particularly, to a display panel and a display apparatus.BACKGROUND
[0002] In recent years, the demand for high-quality display panels with enhanced flexibility and minimal bezel widths has driven significant advancements in AMOLED (Active Matrix Organic Light Emitting Diode) technology. AMOLED displays are widely recognized for their superior color accuracy, high contrast ratios, and energy efficiency, making them the preferred choice in a range of applications, including smartphones, tablets, and wearable devices. The inherent flexibility of AMOLED displays, achieved through the use of flexible substrates, allows for innovative form factors, such as foldable and curved screens, which have rapidly gained popularity in the consumer electronics market.SUMMARY
[0003] In one aspect, the present disclosure provides a display panel, comprising a base substrate, a first planarization layer on the base substrate, and a bending portion; wherein the bending portion comprises one or more signal lines; and one or more protrusions on a side of the first planarization layer closer to a base substrate; wherein a signal line of the one or more signal lines comprises one or more first parts, one or more second parts, and one or more third parts; an orthographic projection of a third part of the one or more third parts on the base substrate at least partially overlaps with an orthographic projection of a protrusion of the one or more protrusions on the base substrate; an orthographic projection of a second part of the one or more second parts on the base substrate is at least partially non-overlapping with the orthographic projection of the protrusion of the one or more protrusions on the base substrate; and an orthographic projection of a first part of the one or more first parts on the base substrate is non-overlapping with the orthographic projection of the protrusion of the one or more protrusions on the base substrate.
[0004] Optionally, the display panel further comprises a buffer layer, a first gate insulating layer, a second gate insulating layer, and an inter-layer dielectric layer sequentially stacked, and between the base substrate and the first planarization layer; wherein the display panel further comprises a via exposing a surface of at least one of the base substrate, the buffer layer, the first gate insulating layer, the second gate insulating layer, or the inter-layer dielectric layer; wherein the one or more protrusions are at least partially in the via; and the first planarization layer at least partially extends into the via.
[0005] Optionally, the first part of the one or more first parts has a first minimum height relative to a main surface of the base substrate; the second part of the one or more second parts has a second minimum height relative to the main surface of the base substrate; the third part of the one or more third parts has a third minimum height relative to the main surface of the base substrate; the first minimum height is greater than the second minimum height; and the third minimum height is greater than the second minimum height.
[0006] Optionally, a total number of the one or more protrusions is one; and a total number of the one or more third parts is one.
[0007] Optionally, a total number of the one or more protrusions is greater than one; and a total number of the one or more third parts is greater than one.
[0008] Optionally, the display panel comprises a first panel portion, the bending portion, and a second panel portion sequentially connected together; wherein a respective signal line of the one or more signal lines extends from the first panel portion into the bending portion, and then into the second panel portion; the respective signal line comprises a first signal line portion at least partially in the first panel portion, a second signal line portion at least partially in the second panel portion, and a third signal line portion at least partially in the bending portion; the third signal line portion connects the first signal line portion with the second signal line portion; the first signal line portion is at least partially in the first signal line layer; the second signal line portion is at least partially in the first signal line layer; and the third signal line portion is at least partially in the second signal line layer.
[0009] Optionally, orthographic projections of the first signal line portion, the second signal line portion, and the third signal line portion on the base substrate extend along a same direction.
[0010] Optionally, an orthographic projection of the first signal line portion on the base substrate and an orthographic projection of the second signal line portion on the base substrate extend along a first direction; an orthographic projection of the third signal line portion on the base substrate extends along a second direction; and the second direction is different from the first direction.
[0011] Optionally, the one or more signal lines in the bending portion comprise a plurality of first signal lines and a plurality of second signal lines; a respective first signal line of the plurality of first signal lines and a respective second signal line of the plurality of second signal lines are in different layers; the respective first signal line comprises the one or more first parts, the one or more second parts, and the one or more third parts; the respective second signal line comprises one or more fourth parts, one or more fifth parts, and one or more sixth parts; an orthographic projection of a sixth part of the one or more sixth parts on the base substrate at least partially overlaps with an orthographic projection of a protrusion of the one or more protrusions on the base substrate; an orthographic projection of a fifth part of the one or more fifth parts on the base substrate is at least partially non-overlapping with the orthographic projection of the protrusion of the one or more protrusions on the base substrate; and an orthographic projection of the fourth part of the one or more fourth parts on the base substrate is non-overlapping with the orthographic projection of the protrusion of the one or more protrusions on the base substrate.
[0012] Optionally, the first part of the one or more first parts has a first minimum height relative to a main surface of the base substrate; the second part of the one or more second parts has a second minimum height relative to the main surface of the base substrate; the third part of the one or more third parts has a third minimum height relative to the main surface of the base substrate; the fourth part of the one or more fourth parts has a fourth minimum height relative to the main surface of the base substrate; the fifth part of the one or more fifth parts has a fifth minimum height relative to the main surface of the base substrate; the sixth part of the one or more sixth parts has a sixth minimum height relative to the main surface of the base substrate; the first minimum height is greater than the second minimum height; the third minimum height is greater than the second minimum height; the fourth minimum height is greater than the fifth minimum height; and the sixth minimum height is greater than the fifth minimum height.
[0013] Optionally, the display panel comprises a first panel portion, the bending portion, and a second panel portion connected together; a first signal line of the plurality of first signal lines extends from the first panel portion into the bending portion, and then into the second panel portion; the first signal line comprises a first signal line portion at least partially in the first panel portion, a second signal line portion at least partially in the second panel portion, and a third signal line portion at least partially in the bending portion; the third signal line portion connects the first signal line portion with the second signal line portion; the first signal line portion is at least partially in the first signal line layer; the second signal line portion is at least partially in the first signal line layer; the third signal line portion is at least partially in the second signal line layer; a second signal line of the plurality of second signal lines extends from the first panel portion into the bending portion, and then into the second panel portion; the second signal line comprises a fourth signal line portion at least partially in the first panel portion, a fifth signal line portion at least partially in the second panel portion, and a sixth signal line portion at least partially in the bending portion; the sixth signal line portion connects the fourth signal line portion with the fifth signal line portion; the fourth signal line portion is at least partially in the first signal line layer; the fifth signal line portion is at least partially in the first signal line layer; and the sixth signal line portion is at least partially in the third signal line layer.
[0014] Optionally, an orthographic projection of the first signal line portion on the base substrate, an orthographic projection of the second signal line portion on the base substrate, an orthographic projection of the fourth signal line portion on the base substrate, and an orthographic projection of the fifth signal line portion on the base substrate, extend along a first direction; an orthographic projection of the third signal line portion on the base substrate extends along a second direction; an orthographic projection of the sixth signal line portion on the base substrate extends along a third direction; the second direction is different from the first direction; the third direction is different from the first direction; and the third direction is different from the second direction.
[0015] Optionally, orthographic projections of the plurality of first signal lines extend along different directions; and orthographic projections of the plurality of second signal lines extend along different directions.
[0016] Optionally, orthographic projections of the plurality of first signal lines extend along a same direction; and orthographic projections of the plurality of second signal lines extend along a same direction.
[0017] Optionally, the one or more signal lines in the bending portion comprise a plurality of first signal lines, a plurality of second signal lines, and a plurality of third signal lines; a respective first signal line of the plurality of first signal lines, a respective second signal line of the plurality of second signal lines, and a respective third signal line of the plurality of third signal lines are in different layers; the respective first signal line comprises the one or more first parts, the one or more second parts, and the one or more third parts; the respective second signal line comprises one or more fourth parts, one or more fifth parts, and one or more sixth parts; the respective third signal line comprises one or more seventh parts, one or more eighth parts, and one or more ninth parts; an orthographic projection of a sixth part of the one or more sixth parts on the base substrate at least partially overlaps with an orthographic projection of a protrusion of the one or more protrusions on the base substrate; an orthographic projection of a fifth part of the one or more fifth parts on the base substrate is at least partially non-overlapping with the orthographic projection of the protrusion of the one or more protrusions on the base substrate; an orthographic projection of the fourth part of the one or more fourth parts on the base substrate is non-overlapping with the orthographic projection of the protrusion of the one or more protrusions on the base substrate; an orthographic projection of the ninth part of the one or more ninth parts on the base substrate at least partially overlaps with an orthographic projection of a protrusion of the one or more protrusions on the base substrate; an orthographic projection of the eighth part of the one or more eighth parts on the base substrate is at least partially non-overlapping with the orthographic projection of the protrusion of the one or more protrusions on the base substrate; and an orthographic projection of the seventh part of the one or more seventh parts on the base substrate is non-overlapping with the orthographic projection of the protrusion of the one or more protrusions on the base substrate.
[0018] Optionally, the first part of the one or more first parts has a first minimum height relative to a main surface of the base substrate; the second part of the one or more second parts has a second minimum height relative to the main surface of the base substrate; the third part of the one or more third parts has a third minimum height relative to the main surface of the base substrate; the fourth part of the one or more fourth parts has a fourth minimum height relative to the main surface of the base substrate; the fifth part of the one or more fifth parts has a fifth minimum height relative to the main surface of the base substrate; the sixth part of the one or more sixth parts has a sixth minimum height relative to the main surface of the base substrate; the seventh part of the one or more seventh parts has a seventh minimum height relative to the main surface of the base substrate; the eighth part of the one or more eighth parts has a eighth minimum height relative to the main surface of the base substrate; the ninth part of the one or more ninth parts has a ninth minimum height relative to the main surface of the base substrate; the first minimum height is greater than the second minimum height; the third minimum height is greater than the second minimum height; the fourth minimum height is greater than the fifth minimum height; the sixth minimum height is greater than the fifth minimum height; the seventh minimum height is greater than the eighth minimum height; and the ninth minimum height is greater than the eighth minimum height.
[0019] Optionally, the display panel comprises a first panel portion, the bending portion, and a second panel portion connected together; a first signal line of the plurality of first signal lines extends from the first panel portion into the bending portion, and then into the second panel portion; the first signal line comprises a first signal line portion at least partially in the first panel portion, a second signal line portion at least partially in the second panel portion, and a third signal line portion at least partially in the bending portion; the third signal line portion connects the first signal line portion with the second signal line portion; the first signal line portion is at least partially in the first signal line layer; the second signal line portion is at least partially in the first signal line layer; the third signal line portion is at least partially in the second signal line layer; a second signal line of the plurality of second signal lines extends from the first panel portion into the bending portion, and then into the second panel portion; the second signal line comprises a fourth signal line portion at least partially in the first panel portion, a fifth signal line portion at least partially in the second panel portion, and a sixth signal line portion at least partially in the bending portion; the sixth signal line portion connects the fourth signal line portion with the fifth signal line portion; the fourth signal line portion is at least partially in the first signal line layer; the fifth signal line portion is at least partially in the first signal line layer; the sixth signal line portion is at least partially in the third signal line layer; a third signal line of the plurality of third signal lines extends from the first panel portion into the bending portion, and then into the second panel portion; the third signal line comprises a seventh signal line portion at least partially in the first panel portion, an eighth signal line portion at least partially in the second panel portion, and a ninth signal line portion at least partially in the bending portion; the ninth signal line portion connects the seventh signal line portion with the eighth signal line portion; the seventh signal line portion is at least partially in the first signal line layer; the eighth signal line portion is at least partially in the first signal line layer; and the ninth signal line portion is at least partially in the first signal line layer.
[0020] Optionally, an orthographic projection of the first signal line portion on the base substrate, an orthographic projection of the second signal line portion on the base substrate, an orthographic projection of the fourth signal line portion on the base substrate, an orthographic projection of the fifth signal line portion on the base substrate, an orthographic projection of the seventh signal line portion on the base substrate, and an orthographic projection of the eighth signal line portion on the base substrate extend along a first direction; an orthographic projection of the third signal line portion on the base substrate extends along a second direction; an orthographic projection of the sixth signal line portion on the base substrate extends along a third direction; an orthographic projection of at least a portion of the ninth signal line portion on the base substrate extends along a fourth direction; the second direction is different from the first direction; the third direction is different from the first direction; the third direction is the same as the second direction; the fourth direction is different from the first direction; and the fourth direction is different from the second direction.
[0021] Optionally, the ninth signal line portion extends first along the first direction, then along the fourth direction, and then along the first direction.
[0022] In another aspect, the present disclosure provides a display apparatus, comprising the display panel described herein or fabricated by a method described herein, and one or more integrated circuits connected to the display panel.BRIEF DESCRIPTION OF THE FIGURES
[0023] The following drawings are merely examples for illustrative purposes according to various disclosed embodiments and are not intended to limit the scope of the present invention.
[0024] FIG. 1 is a schematic diagram of a display panel in some embodiments according to the present disclosure.
[0025] FIG. 2 is a schematic diagram of a display panel in some embodiments according to the present disclosure.
[0026] FIG. 3 is a plan view of a display panel in some embodiments according to the present disclosure.
[0027] FIG. 4A illustrates a detailed structure in a display area in a display panel in some embodiments according to the present disclosure.
[0028] FIG. 4B illustrates a detailed structure in a display area in a display apparatus in some embodiments according to the present disclosure.
[0029] FIG. 5 is a schematic diagram illustrating the structure of a bending portion in a related display panel.
[0030] FIG. 6 is a schematic diagram illustrating the structure of a bending portion in a display panel in some embodiments according to the present disclosure.
[0031] FIG. 7 is a schematic diagram illustrating the structure of a bending portion in a display panel in some embodiments according to the present disclosure.
[0032] FIG. 8 is a schematic diagram illustrating the structure of a bending portion in a display panel in some embodiments according to the present disclosure.
[0033] FIG. 9 is a schematic diagram illustrating the structure of a bending portion in a display panel in some embodiments according to the present disclosure.
[0034] FIG. 10 is a schematic diagram illustrating the structure of a bending portion in a display panel in some embodiments according to the present disclosure.
[0035] FIG. 11 is a schematic diagram illustrating the structure of a bending portion in a display panel in some embodiments according to the present disclosure.
[0036] FIG. 12 is a schematic diagram illustrating the structure of a bending portion in a display panel in some embodiments according to the present disclosure.
[0037] FIG. 13 is a schematic diagram illustrating the structure of a bending portion in a display panel in some embodiments according to the present disclosure.
[0038] FIG. 14 is a schematic diagram illustrating the structure of a bending portion in a display panel in some embodiments according to the present disclosure.
[0039] FIG. 15 is a schematic diagram illustrating the structure of a bending portion in a display panel in some embodiments according to the present disclosure.
[0040] FIG. 16 is a schematic diagram illustrating the structure of a bending portion in a display panel in some embodiments according to the present disclosure.DETAILED DESCRIPTION
[0041] The disclosure will now be described more specifically with reference to the following embodiments. It is to be noted that the following descriptions of some embodiments are presented herein for purpose of illustration and description only. It is not intended to be exhaustive or to be limited to the precise form disclosed.
[0042] FIG. 1 is a schematic diagram of a display panel in some embodiments according to the present disclosure. Referring to FIG. 1, the display panel includes a display portion in a display region DR where an image is displayed by an array of subpixels in the display portion. A peripheral region of the display panel surrounds the display region DR. Although a rectangular display region is shown in FIG. 1, the display region DR may have any appropriate shapes and dimensions. Examples of appropriate shapes of the display region DR include a circular shape, a square shape, a hexagonal shape, an elliptical shape, and an irregular polygon shape. Each subpixel in the display region DR may be electrically connected to a pixel driving circuit, which includes one or more thin film transistors. The display panel further includes gate lines and data lines for providing signals for driving image display in the display region DR. These signal lines are electrically connected to one or more integrated circuits such as gate driving integrated circuit and data driving integrated circuit. The one or more integrated circuits may be integrated into the display panel (chip-on-glass) or mounted on a flexible printed circuit (chip-on-film) . The one or more integrated circuits are electrically connected to the flexible printed circuit. The display panel further includes various other signal lines such as a high voltage supply line VDD, a low voltage supply line VSS, and an initiation signal line.
[0043] The display panel further includes a bending portion PBP and a connecting portion CP. The connecting portion CP is a portion where a flexible printed circuit can be bonded to the display panel. The bending portion PBP is flexible or bendable. As shown in FIG. 1, the bending portion PBP may be bent along the direction of an arrow depicted in FIG. 1 so that the connecting portion CP can be bent toward a back side of the display portion. FIG. 2 is a schematic diagram of a display panel in some embodiments according to the present disclosure. FIG. 2 depicts a display panel in which the bending portion PBP is bent, and the connecting portion CP is bent toward the back side of the display portion.
[0044] FIG. 3 is a plan view of a display panel in some embodiments according to the present disclosure. Referring to FIG. 3, the display portion DP in some embodiments is in a display region DR in which an image is displayed and a fanout region FR between the display region DR and the bending portion PBP, the display portion DP including a plurality of signal lines SL extending through the fanout region FR.
[0045] As used herein, the term “display region” refers to a region of a display panel in a display panel where image is actually displayed. Optionally, the display region may include both a subpixel region and an inter-subpixel region. A subpixel region refers to a light emission region of a subpixel, such as a region corresponding to a pixel electrode in a liquid crystal display or a region corresponding to a light emissive layer in an organic light emitting diode display panel. An inter-subpixel region refers to a region between adjacent subpixel regions, such as a region corresponding to a black matrix in a liquid crystal display or a region corresponding a pixel definition layer in an organic light emitting diode display panel. Optionally, the inter-subpixel region is a region between adjacent subpixel regions in a same pixel. Optionally, the inter-subpixel region is a region between two adjacent subpixel regions from two adjacent pixels. Optionally, the display panel is a flexible display panel.
[0046] In recent years, the rapid advancement of the AMOLED industry globally has been driven by the exceptional display quality of AMOLED screens, with applications increasingly shifting toward full-screen configurations. This trend leverages the flexibility and foldability of AMOLED substrates; however, the intrinsic fragility of flexible products has compromised the panel’s resistance to compression, impact, and drops, thereby intensifying the challenge of reinforcing mechanical strength.
[0047] Moreover, the push for narrower bezels has led to a continuous reduction in the radius of the bending area, imposing heightened demands on the structural integrity of bending regions. Consequently, design enhancements are essential to bolster bending strength, ensuring display reliability under rigorous conditions.
[0048] FIG. 4A illustrates a detailed structure in a display area in a display apparatus in some embodiments according to the present disclosure. Referring to FIG. 4A, the display apparatus in the display area in some embodiments includes a base substrate BS (e.g., a flexible base substrate) ; an active layer ACT of a respective one of a plurality of thin film transistors TFT on the base substrate BS; a first gate insulating layer GI1 on a side of the active layer ACT away from the base substrate BS; a gate electrode G and a first capacitor electrode Ce1 (both are parts of a first gate metal layer) on a side of the first gate insulating layer GI1 away from the base substrate BS; an second gate insulating layer GI2 on a side of the gate electrode G and the first capacitor electrode Ce1 away from the first gate insulating layer GI1; a second capacitor electrode Ce2 (a part of a second gate metal layer) on a side of the second gate insulating layer GI2 away from the first gate insulating layer GI1; an inter-layer dielectric layer ILD on a side of the second capacitor electrode Ce2 away from the first gate insulating layer GI1; a source electrode S and a drain electrode D (parts of a first SD metal layer) on a side of the inter-layer dielectric layer ILD away from the first gate insulating layer GI1; a planarization layer PLN on a side of the source electrode S and the drain electrode D away from the inter-layer dielectric layer ILD; a pixel definition layer PDL defining a subpixel aperture and on a side of the planarization layer PLN away from the base substrate BS; and a light emitting element LE in the subpixel aperture. The light emitting element LE includes an anode AD on a side of the planarization layer PLN away from the inter-layer dielectric layer ILD; a light emitting layer EL on a side of the anode AD away from the planarization layer PLN; and a cathode layer CD on a side of the light emitting layer EL away from the anode AD. The display apparatus in the display area further includes an encapsulating layer EN encapsulating the light emitting element LE, and on a side of the cathode layer CD away from the base substrate BS. The encapsulating layer EN in some embodiments includes a first inorganic encapsulating sub-layer CVD1 on a side of the cathode layer CD away from the base substrate BS, an organic encapsulating sub-layer IJP on a side of the first inorganic encapsulating sub-layer CVD1 away from the base substrate BS, and a second inorganic encapsulating sub-layer CVD2 on a side of the organic encapsulating sub-layer IJP away from the first inorganic encapsulating sub-layer CVD1. The display apparatus in the display area further includes a buffer layer BUF on a side of the encapsulating layer EN away from the base substrate BS; a plurality of second electrode bridges BR2 on a side of the buffer layer BUF away from the encapsulating layer EN; a touch insulating layer TI on a side of the plurality of second electrode bridges BR2 away from the buffer layer BUF; a plurality of first touch electrodes TE1 on a side of the touch insulating layer TI away from the buffer layer BUF; and an overcoat layer OC on a side of the plurality of first touch electrodes TE1 away from the touch insulating layer TI.
[0049] FIG. 4B illustrates a detailed structure in a display area in a display apparatus in some embodiments according to the present disclosure. Referring to FIG. 4B, the display apparatus in the display area in some embodiments includes a base substrate BS (e.g., a flexible base substrate) ; an active layer ACT of a respective one of a plurality of thin film transistors TFT on the base substrate BS; a first gate insulating layer GI1 on a side of the active layer ACT away from the base substrate BS; a gate electrode G and a first capacitor electrode Ce1 (both are parts of a first gate metal layer) on a side of the first gate insulating layer GI1 away from the base substrate BS; an second gate insulating layer GI2 on a side of the gate electrode G and the first capacitor electrode Ce1 away from the first gate insulating layer GI1; a second capacitor electrode Ce2 (a part of a second gate metal layer) on a side of the second gate insulating layer GI2 away from the first gate insulating layer GI1; an inter-layer dielectric layer ILD on a side of the second capacitor electrode Ce2 away from the first gate insulating layer GI1; a source electrode S and a drain electrode D (parts of a first SD metal layer) on a side of the inter-layer dielectric layer ILD away from the first gate insulating layer GI1; a passivation layer PVX on a side of the source electrode S and the drain electrode D away from the inter-layer dielectric layer ILD; a first planarization layer PLN1 on a side of the passivation layer PVX away from the inter-layer dielectric layer ILD; a relay electrode RE (part of a second SD metal layer) on side of the first planarization layer PLN1 away from the passivation layer PVX; a second planarization layer PLN2 on a side of the relay electrode RE away from the first planarization layer PLN1; a pixel definition layer PDL defining a subpixel aperture and on a side of the second planarization layer PLN2 away from the base substrate BS; and a light emitting element LE in the subpixel aperture. The light emitting element LE includes an anode AD on a side of the second planarization layer PLN2 away from the first planarization layer PLN1; a light emitting layer EL on a side of the anode AD away from the second planarization layer PLN2; and a cathode layer CD on a side of the light emitting layer EL away from the anode AD. The display apparatus in the display area further includes an encapsulating layer EN encapsulating the light emitting element LE, and on a side of the cathode layer CD away from the base substrate BS. The encapsulating layer EN in some embodiments includes a first inorganic encapsulating sub-layer CVD1 on a side of the cathode layer CD away from the base substrate BS, an organic encapsulating sub-layer IJP on a side of the first inorganic encapsulating sub-layer CVD1 away from the base substrate BS, and a second inorganic encapsulating sub-layer CVD2 on a side of the organic encapsulating sub-layer IJP away from the first inorganic encapsulating sub-layer CVD1. The display apparatus in the display area further includes a buffer layer BUF on a side of the encapsulating layer EN away from the base substrate BS; a plurality of second electrode bridges BR2 on a side of the buffer layer BUF away from the encapsulating layer EN; a touch insulating layer TI on a side of the plurality of second electrode bridges BR2 away from the buffer layer BUF; a plurality of first touch electrodes TE1 on a side of the touch insulating layer TI away from the buffer layer BUF; and an overcoat layer OC on a side of the plurality of first touch electrodes TE1 away from the touch insulating layer TI. Optionally, the display apparatus in the display area does not include the passivation layer PVX, e.g., the inter-layer dielectric layer ILD is in direct contact with the first planarization layer PLN1.
[0050] Referring to FIG. 4A and FIG. 4B, the display apparatus includes a semiconductor material layer SML, a first gate metal layer Gate1, a second gate metal layer Gate2, a first signal line layer SD1, and a second signal line layer SD2. The display apparatus further includes an second gate insulating layer GI2 between the first gate metal layer Gate1 and the second gate metal layer Gate2; an inter-layer dielectric layer ILD between the second conductive layer Gate2 and the first signal line layer SD1; and at least a passivation layer PVX or a planarization layer PLN between the first signal line layer SD1 and the second signal line layer SD2.
[0051] FIG. 5 is a schematic diagram illustrating the structure of a bending portion in a related display panel. Referring to FIG. 5, the related display panel includes a base substrate BS, a buffer layer BUF on the base substrate BS, a first gate insulating layer GI1 on a side of the buffer layer BUF away from the base substrate BS, a second gate insulating layer GI2 on a side of the first gate insulating layer GI1 away from the base substrate BS, an inter-layer dielectric layer ILD on a side of the second gate insulating layer GI2 away from the base substrate BS, a signal line layer SD on a side of the inter-layer dielectric layer ILD away from the base substrate BS, a planarization layer PLN on a side of the signal line layer SD away from the base substrate BS, and a pixel definition layer PDL on a side of the planarization layer PLN away from the base substrate BS.
[0052] In some embodiments, the signal line layer SD includes one or more signal lines SL. Referring to FIG. 5, the related display panel includes a via v exposing surfaces of the base substrate BS, the buffer layer BUF, the first gate insulating layer GI1, the second gate insulating layer GI2, and the inter-layer dielectric layer ILD. In the related display panel, the one or more signal lines SL extends into the via v, and is in contact with the base substrate BS, the buffer layer BUF, the first gate insulating layer GI1, the second gate insulating layer GI2, and the inter-layer dielectric layer ILD. The planarization layer PLN is on a side of the one or more signal lines SL away from the base substrate BS. The planarization layer PLN is partially in the via v. The one or more signal lines SL have a step structure gradually descending from the inter-layer dielectric layer ILD to the base substrate BS.
[0053] The inventors of the present disclosure discover that the one or more signal lines SL are prone to crack defect (as denoted by CRK in FIG. 5) because the one or more signal lines SL are in contact with multiple inorganic material layers.
[0054] FIG. 6 is a schematic diagram illustrating the structure of a bending portion in a related display panel. Referring to FIG. 6, the related display panel includes a base substrate BS, a buffer layer BUF on the base substrate BS, a first gate insulating layer GI1 on a side of the buffer layer BUF away from the base substrate BS, a second gate insulating layer GI2 on a side of the first gate insulating layer GI1 away from the base substrate BS, an inter-layer dielectric layer ILD on a side of the second gate insulating layer GI2 away from the base substrate BS, a first signal line layer SD1 on a side of the inter-layer dielectric layer ILD away from the base substrate BS, a first planarization layer PLN1 on a side of the first signal line layer SD1 away from the base substrate BS, a second signal line layer SD2 on a side of the first planarization layer PLN1 away from the base substrate BS, a second planarization layer PLN2 on a side of the second signal line layer SD2 away from the base substrate BS, and an overcoat layer OC on a side of the second planarization layer PLN2 away from the base substrate BS.
[0055] In some embodiments, the display panel in the bending portion includes one or more signal lines. In some embodiments, a respective signal line of the one or more signal lines includes one or more first portions P1 and one or more second portions P2. The one or more first portions P1 are in the first signal line layer SD1, the one or more second portions P2 are in the second signal line layer SD2. A second portion of the one or more second portions P2 extends through the first planarization layer PLN1 to connect to the one or more first portions P1.
[0056] The related display panel includes a via v exposing surfaces of the base substrate BS, the buffer layer BUF, the first gate insulating layer GI1, the second gate insulating layer GI2, and the inter-layer dielectric layer ILD. The first planarization layer PLN1 extends into the via v. The one or more second portions P2 are on a side of the first planarization layer PLN1 away from the base substrate BS.
[0057] The inventors of the present disclosure discover that, because the presence of a portion of the first planarization layer PLN1 in the via v and underneath the one or more second portions P2, the one or more signal lines is raised higher. The one or more signal lines are less prone to crack defect. However, the bendability of the bending portion is decreased.
[0058] Accordingly, the present disclosure provides, inter alia, a touch substrate, a display panel and a display apparatus that substantially obviate one or more of the problems due to limitations and disadvantages of the related art. In one aspect, the present disclosure provides a display panel. In some embodiments, the display panel includes a bending portion. Optionally, the bending portion includes one or more signal lines; and one or more protrusions on a side of a first planarization layer closer to a base substrate. Optionally, a signal line of the one or more signal lines comprises one or more first parts, one or more second parts, and one or more third parts. Optionally, an orthographic projection of a third part of the one or more third parts on the base substrate at least partially overlaps with an orthographic projection of a protrusion of the one or more protrusions on the base substrate. Optionally, an orthographic projection of a second part of the one or more second parts on the base substrate is at least partially non-overlapping with the orthographic projection of the protrusion of the one or more protrusions on the base substrate. Optionally, an orthographic projection of a first part of the one or more first parts on the base substrate is non-overlapping with the orthographic projection of the protrusion of the one or more protrusions on the base substrate.
[0059] FIG. 7 is a schematic diagram illustrating the structure of a bending portion in a display panel in some embodiments according to the present disclosure. Referring to FIG. 7, the display panel in some embodiments includes a base substrate BS, a buffer layer BUF on the base substrate BS, a first gate insulating layer GI1 on a side of the buffer layer BUF away from the base substrate BS, a second gate insulating layer GI2 on a side of the first gate insulating layer GI1 away from the base substrate BS, an inter-layer dielectric layer ILD on a side of the second gate insulating layer GI2 away from the base substrate BS, a first signal line layer SD1 on a side of the inter-layer dielectric layer ILD away from the base substrate BS, a first planarization layer PLN1 on a side of the first signal line layer SD1 away from the base substrate BS, a second signal line layer SD2 on a side of the first planarization layer PLN1 away from the base substrate BS, a second planarization layer PLN2 on a side of the second signal line layer SD2 away from the base substrate BS, and an overcoat layer OC on a side of the second planarization layer PLN2 away from the base substrate BS.
[0060] In some embodiments, the display panel in the bending portion includes one or more signal lines. In some embodiments, a respective signal line of the one or more signal lines includes one or more first portions P1 and one or more second portions. The one or more first portions P1 are in the first signal line layer SD1, the one or more second portions are in the second signal line layer SD2. A second portion of the one or more second portions extends through the first planarization layer PLN1 to connect to a first portion of the one or more first portions.
[0061] The display panel in some embodiments includes a via v exposing surfaces of the base substrate BS, the buffer layer BUF, the first gate insulating layer GI1, the second gate insulating layer GI2, and the inter-layer dielectric layer ILD. The first planarization layer PLN1 extends into the via v. The one or more second portions are on a side of the first planarization layer PLN1 away from the base substrate BS, and on a side of the second planarization layer PLN2 closer to the base substrate BS.
[0062] In some embodiments, the bending portion further includes one or more protrusions PT on a side of the first planarization layer PLN1 closer to the base substrate BS, and at least partially in the via v. Optionally, the one or more protrusions PT is in contact with the base substrate BS. Optionally, the one or more protrusions PT is in contact with the first planarization layer PLN1. Optionally, the one or more protrusions PT is spaced apart from the buffer layer BUF, spaced apart from the first gate insulating layer GI1, spaced apart from the second gate insulating layer GI2, and spaced apart from the inter-layer dielectric layer ILD. Optionally, the first planarization layer PLN1 spaces apart the one or more protrusions PT from the buffer layer BUF, from the first gate insulating layer GI1, from the second gate insulating layer GI2, and from the inter-layer dielectric layer ILD.
[0063] In some embodiments, a signal line of the one or more signal lines includes one or more first parts P2-1, one or more second parts P2-2, and one or more third parts P2-3. Optionally, a first part of the one or more first parts P2-1 is connected to a second part of the one or more second parts P2-2. Optionally, the second part of the one or more second parts P2-2 is connected to the first part of the one or more first parts P2-1 and connected to a third part of the one or more third parts P2-3.
[0064] In some embodiments, an orthographic projection of the third part of the one or more third parts P2-3 on a base substrate BS at least partially overlaps with an orthographic projection of a protrusion of the one or more protrusions PT on the base substrate BS.
[0065] In some embodiments, an orthographic projection of the second part of the one or more second parts P2-2 on the base substrate is at least partially non-overlapping with the orthographic projection of the protrusion of the one or more protrusions PT on the base substrate BS.
[0066] In some embodiments, an orthographic projection of the first part of the one or more first parts P2-1 on the base substrate is non-overlapping with the orthographic projection of the protrusion of the one or more protrusions PT on the base substrate BS.
[0067] In some embodiments, the first part of the one or more first parts P2-1 has a first minimum height h1 relative to a main surface of the base substrate BS, the second part of the one or more second parts P2-2 has a second minimum height h2 relative to the main surface of the base substrate BS, and the third part of the one or more third parts P2-3 has a third minimum height h3 relative to the main surface of the base substrate BS. Optionally, the first minimum height h1 is greater than the second minimum height h2. Optionally, the third minimum height h3 is greater than the second minimum height h2.
[0068] In one example depicted in FIG. 7, a total number of the one or more protrusions PT is one, a total number of the one or more third parts P2-3 is one, a total number of the one or more second parts P2-2 is two, and a total number of the one or more first parts P2-1 is two.
[0069] FIG. 8 is a schematic diagram illustrating the structure of a bending portion in a display panel in some embodiments according to the present disclosure. Referring to FIG. 8, the display panel in some embodiments includes a base substrate BS, a buffer layer BUF on the base substrate BS, a first gate insulating layer GI1 on a side of the buffer layer BUF away from the base substrate BS, a second gate insulating layer GI2 on a side of the first gate insulating layer GI1 away from the base substrate BS, an inter-layer dielectric layer ILD on a side of the second gate insulating layer GI2 away from the base substrate BS, a first signal line layer SD1 on a side of the inter-layer dielectric layer ILD away from the base substrate BS, a first planarization layer PLN1 on a side of the first signal line layer SD1 away from the base substrate BS, a second signal line layer SD2 on a side of the first planarization layer PLN1 away from the base substrate BS, a second planarization layer PLN2 on a side of the second signal line layer SD2 away from the base substrate BS, and an overcoat layer OC on a side of the second planarization layer PLN2 away from the base substrate BS.
[0070] In some embodiments, the display panel in the bending portion includes one or more signal lines. In some embodiments, a respective signal line of the one or more signal lines includes one or more first portions P1 and one or more second portions. The one or more first portions P1 are in the first signal line layer SD1, the one or more second portions are in the second signal line layer SD2. A second portion of the one or more second portions extends through the first planarization layer PLN1 to connect to a first portion of the one or more first portions.
[0071] The display panel in some embodiments includes a via v exposing surfaces of the base substrate BS, the buffer layer BUF, the first gate insulating layer GI1, the second gate insulating layer GI2, and the inter-layer dielectric layer ILD. The first planarization layer PLN1 extends into the via v. The one or more second portions are on a side of the first planarization layer PLN1 away from the base substrate BS, and on a side of the second planarization layer PLN2 closer to the base substrate BS.
[0072] In some embodiments, the bending portion further includes one or more protrusions PT (e.g., multiple protrusions) on a side of the first planarization layer PLN1 closer to the base substrate BS, and at least partially in the via v. Optionally, the one or more protrusions PT is in contact with the base substrate BS. Optionally, the one or more protrusions PT is in contact with the first planarization layer PLN1. Optionally, the one or more protrusions PT is spaced apart from the first gate insulating layer GI1, spaced apart from the second gate insulating layer GI2, and spaced apart from the inter-layer dielectric layer ILD. Optionally, the first planarization layer PLN1 spaces apart the one or more protrusions PT from the buffer layer BUF, from the first gate insulating layer GI1, from the second gate insulating layer GI2, and from the inter-layer dielectric layer ILD.
[0073] In some embodiments, a signal line of the one or more signal lines includes one or more first parts P2-1, one or more second parts P2-2, and one or more third parts P2-3 (e.g., multiple third parts) . Optionally, a first part of the one or more first parts P2-1 is connected to a first portion of the one or more first portions P1, and is connected to a second part of the one or more second parts P2-2. Optionally, the second part of the one or more second parts P2-2 is connected to the first part of the one or more first parts P2-1 and connected to a third part of the one or more third parts P2-3.
[0074] In some embodiments, an orthographic projection of the third part of the one or more third parts P2-3 on a base substrate BS at least partially overlaps with an orthographic projection of a protrusion of the one or more protrusions PT on the base substrate BS.
[0075] In some embodiments, an orthographic projection of the second part of the one or more second parts P2-2 on the base substrate is at least partially non-overlapping with the orthographic projection of the protrusion of the one or more protrusions PT on the base substrate BS.
[0076] In some embodiments, an orthographic projection of the first part of the one or more first parts P2-1 on the base substrate is non-overlapping with the orthographic projection of the protrusion of the one or more protrusions PT on the base substrate BS.
[0077] In some embodiments, the first part of the one or more first parts P2-1 has a first minimum height h1 relative to a main surface of the base substrate BS, the second part of the one or more second parts P2-2 has a second minimum height h2 relative to the main surface of the base substrate BS, and the third part of the one or more third parts P2-3 has a third minimum height h3 relative to the main surface of the base substrate BS. Optionally, the first minimum height h1 is greater than the second minimum height h2. Optionally, the third minimum height h3 is greater than the second minimum height h2.
[0078] In one example depicted in FIG. 8, a total number of the one or more protrusions PT is three, a total number of the one or more third parts P2-3 is three, a total number of the one or more second parts P2-2 is four, and a total number of the one or more first parts P2-1 is two.
[0079] In one example, the one or more protrusions PT are parts of a unitary structure.
[0080] FIG. 9 is a schematic diagram illustrating the structure of a bending portion in a display panel in some embodiments according to the present disclosure. Referring to FIG. 9, the display panel in some embodiments includes a first panel portion PL1 (e.g., the display region DR depicted in FIG. 2) , the bending portion PBP, and a second panel portion PL2 (e.g., the connecting portion CP depicted in FIG. 2) connected together. In some embodiments, a respective signal line of the one or more signal lines extends from the first panel portion PL1 into the bending portion PBP, and then into the second panel portion PL2. The respective signal line in some embodiments includes a first signal line portion SL1 at least partially in the first panel portion PL1, a second signal line portion SL2 at least partially in the second panel portion PL2, and a third signal line portion SL3 at least partially in the bending portion PBP. The third signal line portion SL3 connects the first signal line portion SL1 with the second signal line portion SL2.
[0081] In some embodiments, orthographic projections of the first signal line portion SL1, the second signal line portion SL2, and the third signal line portion SL3 on the base substrate extend along a same direction, e.g., along a first direction DR1.
[0082] In some embodiments, the first signal line portion SL1 is at least partially in the first signal line layer, the second signal line portion SL2 is at least partially in the first signal line layer, and the third signal line portion SL3 is at least partially in the second signal line layer.
[0083] FIG. 10 is a schematic diagram illustrating the structure of a bending portion in a display panel in some embodiments according to the present disclosure. Referring to FIG. 10, the display panel in some embodiments includes a first panel portion PL1 (e.g., the display region DR depicted in FIG. 2) , the bending portion PBP, and a second panel portion PL2 (e.g., the connecting portion CP depicted in FIG. 2) connected together. In some embodiments, a respective signal line of the one or more signal lines extends from the first panel portion PL1 into the bending portion PBP, and then into the second panel portion PL2. The respective signal line in some embodiments includes a first signal line portion SL1 at least partially in the first panel portion PL1, a second signal line portion SL2 at least partially in the second panel portion PL2, and a third signal line portion SL3 at least partially in the bending portion PBP. The third signal line portion SL3 connects the first signal line portion SL1 with the second signal line portion SL2.
[0084] In some embodiments, an orthographic projection of the third signal line portion SL3 on the base substrate extends along a direction different from an orthographic projection of the first signal line portion SL1 on the base substrate. In some embodiments, an orthographic projection of the third signal line portion SL3 on the base substrate extends along a direction different from an orthographic projection of the second signal line portion SL2 on the base substrate. In one example, the orthographic projection of the first signal line portion SL1 on the base substrate and the orthographic projection of the second signal line portion SL2 on the base substrate extend along a first direction DR1; the orthographic projection of the third signal line portion SL3 on the base substrate extends along a second direction DR2. The second direction DR2 is different from the first direction DR1.
[0085] In some embodiments, the first signal line portion SL1 is at least partially in the first signal line layer, the second signal line portion SL2 is at least partially in the first signal line layer, and the third signal line portion SL3 is at least partially in the second signal line layer.
[0086] FIG. 11 is a schematic diagram illustrating the structure of a bending portion in a display panel in some embodiments according to the present disclosure. Referring to FIG. 11, the display panel in some embodiments includes a base substrate BS, a buffer layer BUF on the base substrate BS, a first gate insulating layer GI1 on a side of the buffer layer BUF away from the base substrate BS, a second gate insulating layer GI2 on a side of the first gate insulating layer GI1 away from the base substrate BS, an inter-layer dielectric layer ILD on a side of the second gate insulating layer GI2 away from the base substrate BS, a first signal line layer SD1 on a side of the inter-layer dielectric layer ILD away from the base substrate BS, a first planarization layer PLN1 on a side of the first signal line layer SD1 away from the base substrate BS, a second signal line layer SD2 on a side of the first planarization layer PLN1 away from the base substrate BS, a second planarization layer PLN2 on a side of the second signal line layer SD2 away from the base substrate BS, a third signal line layer SD3 on a side of the second planarization layer PLN2 away from the base substrate BS, and an overcoat layer OC on a side of the third signal line layer SD3 away from the base substrate BS.
[0087] In some embodiments, the display panel in the bending portion includes one or more signal lines. In some embodiments, the one or more signal lines in the bending portion include a plurality of first signal lines and a plurality of second signal lines. A respective first signal line of the plurality of first signal lines and a respective second signal line of the plurality of second signal lines are in different layers. In one example, the respective first signal line is in the second signal line layer SD2, and the respective second signal line is in the third signal line layer SD3.
[0088] The display panel in some embodiments includes a via v exposing surfaces of the base substrate BS, the buffer layer BUF, the first gate insulating layer GI1, the second gate insulating layer GI2, and the inter-layer dielectric layer ILD. The first planarization layer PLN1 extends into the via v. The plurality of first signal lines and the plurality of second signal lines are at least partially on a side of the first planarization layer PLN1 away from the base substrate BS, and on a side of the second planarization layer PLN2 closer to the base substrate BS.
[0089] In some embodiments, the bending portion further includes one or more protrusions PT on a side of the first planarization layer PLN1 closer to the base substrate BS, and at least partially in the via v. Optionally, the one or more protrusions PT is in contact with the base substrate BS. Optionally, the one or more protrusions PT is in contact with the first planarization layer PLN1. Optionally, the one or more protrusions PT is spaced apart from the buffer layer BUF, spaced apart from the first gate insulating layer GI1, spaced apart from the second gate insulating layer GI2, and spaced apart from the inter-layer dielectric layer ILD. Optionally, the first planarization layer PLN1 spaces apart the one or more protrusions PT from the buffer layer BUF, from the first gate insulating layer GI1, from the second gate insulating layer GI2, and from the inter-layer dielectric layer ILD.
[0090] In some embodiments, a respective first signal line of the plurality of first signal lines in the bending portion includes one or more first parts P2-1, one or more second parts P2-2, and one or more third parts P2-3. Optionally, a first part of the one or more first parts P2-1 is connected to a second part of the one or more second parts P2-2. Optionally, the second part of the one or more second parts P2-2 is connected to the first part of the one or more first parts P2-1 and connected to a third part of the one or more third parts P2-3.
[0091] In some embodiments, an orthographic projection of the third part of the one or more third parts P2-3 on a base substrate BS at least partially overlaps with an orthographic projection of a protrusion of the one or more protrusions PT on the base substrate BS.
[0092] In some embodiments, an orthographic projection of the second part of the one or more second parts P2-2 on the base substrate is at least partially non-overlapping with the orthographic projection of the protrusion of the one or more protrusions PT on the base substrate BS.
[0093] In some embodiments, an orthographic projection of the first part of the one or more first parts P2-1 on the base substrate is non-overlapping with the orthographic projection of the protrusion of the one or more protrusions PT on the base substrate BS.
[0094] In some embodiments, the first part of the one or more first parts P2-1 has a first minimum height h1 relative to a main surface of the base substrate BS, the second part of the one or more second parts P2-2 has a second minimum height h2 relative to the main surface of the base substrate BS, and the third part of the one or more third parts P2-3 has a third minimum height h3 relative to the main surface of the base substrate BS. Optionally, the first minimum height h1 is greater than the second minimum height h2. Optionally, the third minimum height h3 is greater than the second minimum height h2.
[0095] In one example depicted in FIG. 11, a total number of the one or more protrusions PT is one, a total number of the one or more third parts P2-3 is one, a total number of the one or more second parts P2-2 is two, and a total number of the one or more first parts P2-1 is two.
[0096] In some embodiments, a respective second signal line of the plurality of second signal lines in the bending portion includes one or more fourth parts P3-1, one or more fifth parts P3-2, and one or more sixth parts P3-3. Optionally, a fourth part of the one or more fourth parts P3-1 is connected to a fifth part of the one or more fifth parts P3-2. Optionally, the fifth part of the one or more fifth parts P3-2 is connected to the fourth part of the one or more fourth parts P3-1 and connected to a sixth part of the one or more sixth parts P3-3.
[0097] In some embodiments, an orthographic projection of the sixth part of the one or more sixth parts P3-3 on a base substrate BS at least partially overlaps with an orthographic projection of a protrusion of the one or more protrusions PT on the base substrate BS.
[0098] In some embodiments, an orthographic projection of the fifth part of the one or more fifth parts P3-2 on the base substrate is at least partially non-overlapping with the orthographic projection of the protrusion of the one or more protrusions PT on the base substrate BS.
[0099] In some embodiments, an orthographic projection of the fourth part of the one or more fourth parts P3-1 on the base substrate is non-overlapping with the orthographic projection of the protrusion of the one or more protrusions PT on the base substrate BS.
[0100] In some embodiments, the fourth part of the one or more fourth parts P3-1 has a fourth minimum height h4 relative to a main surface of the base substrate BS, the fifth part of the one or more fifth parts P3-2 has a fifth minimum height h5 relative to the main surface of the base substrate BS, and the sixth part of the one or more sixth parts P3-3 has a sixth minimum height h6 relative to the main surface of the base substrate BS. Optionally, the fourth minimum height h4 is greater than the fifth minimum height h5. Optionally, the sixth minimum height h6 is greater than the fifth minimum height h5.
[0101] In one example depicted in FIG. 11, a total number of the one or more protrusions PT is one, a total number of the one or sixth parts P3-3 is one, a total number of the one or more fifth parts P3-2 is two, and a total number of the one or more fourth parts P3-1 is two.
[0102] In some embodiments, the plurality of first signal lines and the plurality of second signal lines are alternately in the second signal line layer SD2 and the third signal line layer SD3, respectively.
[0103] The inventors of the present disclosure discover that, by having the plurality of first signal lines and the plurality of second signal lines in the second signal line layer SD2 and the third signal line layer SD3, respectively, the stress in the bending portion can be reduced.
[0104] FIG. 12 is a schematic diagram illustrating the structure of a bending portion in a display panel in some embodiments according to the present disclosure. Referring to FIG. 12, the display panel in some embodiments includes a first panel portion PL1 (e.g., the display region DR depicted in FIG. 2) , the bending portion PBP, and a second panel portion PL2 (e.g., the connecting portion CP depicted in FIG. 2) connected together. In some embodiments, a first signal line of the plurality of first signal lines extends from the first panel portion PL1 into the bending portion PBP, and then into the second panel portion PL2. The first signal line in some embodiments includes a first signal line portion SL1 at least partially in the first panel portion PL1, a second signal line portion SL2 at least partially in the second panel portion PL2, and a third signal line portion SL3 at least partially in the bending portion PBP. The third signal line portion SL3 connects the first signal line portion SL1 with the second signal line portion SL2.
[0105] In some embodiments, the first signal line portion SL1 is at least partially in the first signal line layer, the second signal line portion SL2 is at least partially in the first signal line layer, and the third signal line portion SL3 is at least partially in the second signal line layer.
[0106] In some embodiments, an orthographic projection of the third signal line portion SL3 on the base substrate extends along a direction different from an orthographic projection of the first signal line portion SL1 on the base substrate. In some embodiments, an orthographic projection of the third signal line portion SL3 on the base substrate extends along a direction different from an orthographic projection of the second signal line portion SL2 on the base substrate. In one example, the orthographic projection of the first signal line portion SL1 on the base substrate and the orthographic projection of the second signal line portion SL2 on the base substrate extend along a first direction DR1; the orthographic projection of the third signal line portion SL3 on the base substrate extends along a second direction DR2. The second direction DR2 is different from the first direction DR1.
[0107] In some embodiments, a second signal line of the plurality of second signal lines extends from the first panel portion PL1 into the bending portion PBP, and then into the second panel portion PL2. The second signal line in some embodiments includes a fourth signal line portion SL4 at least partially in the first panel portion PL1, a fifth signal line portion SL5 at least partially in the second panel portion PL2, and a sixth signal line portion SL6 at least partially in the bending portion PBP. The sixth signal line portion SL6 connects the fourth signal line portion SL4 with the fifth signal line portion SL5.
[0108] In some embodiments, the fourth signal line portion SL4 is at least partially in the first signal line layer, the fifth signal line portion SL5 is at least partially in the first signal line layer, and the sixth signal line portion SL6 is at least partially in the third signal line layer.
[0109] In some embodiments, an orthographic projection of the sixth signal line portion SL6 on the base substrate extends along a direction different from an orthographic projection of the fourth signal line portion SL4 on the base substrate. In some embodiments, an orthographic projection of the sixth signal line portion SL6 on the base substrate extends along a direction different from an orthographic projection of the fifth signal line portion SL5 on the base substrate. In one example, the orthographic projection of the fourth signal line portion SL4 on the base substrate and the orthographic projection of the fifth signal line portion SL5 on the base substrate extend along a first direction DR1; the orthographic projection of the sixth signal line portion SL6 on the base substrate extends along a third direction DR3. The third direction DR3 is different from the first direction DR1. Optionally, the third direction DR3 is different from the second direction DR2.
[0110] In one example depicted in FIG. 12, at least two of orthographic projections of the plurality of first signal lines extend along different directions. In another example, at least two of orthographic projections of the plurality of second signal lines extend along different directions.
[0111] In another example, orthographic projections of the plurality of first signal lines extend along different directions. In another example, orthographic projections of the plurality of second signal lines extend along different directions.
[0112] FIG. 13 is a schematic diagram illustrating the structure of a bending portion in a display panel in some embodiments according to the present disclosure. Referring to FIG. 13, the display panel in some embodiments includes a first panel portion PL1 (e.g., the display region DR depicted in FIG. 2) , the bending portion PBP, and a second panel portion PL2 (e.g., the connecting portion CP depicted in FIG. 2) connected together. In some embodiments, a first signal line of the plurality of first signal lines extends from the first panel portion PL1 into the bending portion PBP, and then into the second panel portion PL2. The first signal line in some embodiments includes a first signal line portion SL1 at least partially in the first panel portion PL1, a second signal line portion SL2 at least partially in the second panel portion PL2, and a third signal line portion SL3 at least partially in the bending portion PBP. The third signal line portion SL3 connects the first signal line portion SL1 with the second signal line portion SL2.
[0113] In some embodiments, the first signal line portion SL1 is at least partially in the first signal line layer, the second signal line portion SL2 is at least partially in the first signal line layer, and the third signal line portion SL3 is at least partially in the second signal line layer.
[0114] In some embodiments, an orthographic projection of the third signal line portion SL3 on the base substrate extends along a direction different from an orthographic projection of the first signal line portion SL1 on the base substrate. In some embodiments, an orthographic projection of the third signal line portion SL3 on the base substrate extends along a direction different from an orthographic projection of the second signal line portion SL2 on the base substrate. In one example, the orthographic projection of the first signal line portion SL1 on the base substrate and the orthographic projection of the second signal line portion SL2 on the base substrate extend along a first direction DR1; the orthographic projection of the third signal line portion SL3 on the base substrate extends along a second direction DR2. The second direction DR2 is different from the first direction DR1.
[0115] In some embodiments, a second signal line of the plurality of second signal lines extends from the first panel portion PL1 into the bending portion PBP, and then into the second panel portion PL2. The second signal line in some embodiments includes a fourth signal line portion SL4 at least partially in the first panel portion PL1, a fifth signal line portion SL5 at least partially in the second panel portion PL2, and a sixth signal line portion SL6 at least partially in the bending portion PBP. The sixth signal line portion SL6 connects the fourth signal line portion SL4 with the fifth signal line portion SL5.
[0116] In some embodiments, the fourth signal line portion SL4 is at least partially in the first signal line layer, the fifth signal line portion SL5 is at least partially in the first signal line layer, and the sixth signal line portion SL6 is at least partially in the third signal line layer.
[0117] In some embodiments, an orthographic projection of the sixth signal line portion SL6 on the base substrate extends along a direction different from an orthographic projection of the fourth signal line portion SL4 on the base substrate. In some embodiments, an orthographic projection of the sixth signal line portion SL6 on the base substrate extends along a direction different from an orthographic projection of the fifth signal line portion SL5 on the base substrate. In one example, the orthographic projection of the fourth signal line portion SL4 on the base substrate and the orthographic projection of the fifth signal line portion SL5 on the base substrate extend along a first direction DR1; the orthographic projection of the sixth signal line portion SL6 on the base substrate extends along a third direction DR3. The third direction DR3 is different from the first direction DR1. Optionally, the third direction DR3 is different from the second direction DR2.
[0118] In one example depicted in FIG. 13, at least two of orthographic projections of the plurality of first signal lines extend along a same direction. In another example, at least two of orthographic projections of the plurality of second signal lines extend along a same direction.
[0119] In another example, orthographic projections of the plurality of first signal lines extend along a same direction. In another example, orthographic projections of the plurality of second signal lines extend along a same direction.
[0120] FIG. 14 is a schematic diagram illustrating the structure of a bending portion in a display panel in some embodiments according to the present disclosure. Referring to FIG. 14, the display panel in some embodiments includes a base substrate BS, a buffer layer BUF on the base substrate BS, a first gate insulating layer GI1 on a side of the buffer layer BUF away from the base substrate BS, a second gate insulating layer GI2 on a side of the first gate insulating layer GI1 away from the base substrate BS, an inter-layer dielectric layer ILD on a side of the second gate insulating layer GI2 away from the base substrate BS, a first signal line layer SD1 on a side of the inter-layer dielectric layer ILD away from the base substrate BS, a first planarization layer PLN1 on a side of the first signal line layer SD1 away from the base substrate BS, a second signal line layer SD2 on a side of the first planarization layer PLN1 away from the base substrate BS, a second planarization layer PLN2 on a side of the second signal line layer SD2 away from the base substrate BS, a third signal line layer SD3 on a side of the second planarization layer PLN2 away from the base substrate BS, and an overcoat layer OC on a side of the third signal line layer SD3 away from the base substrate BS.
[0121] In some embodiments, the display panel in the bending portion includes one or more signal lines. In some embodiments, the one or more signal lines in the bending portion include a plurality of first signal lines, a plurality of second signal lines, and a plurality of third signal lines. A respective first signal line of the plurality of first signal lines, a respective second signal line of the plurality of second signal lines, and a respective third signal line of the plurality of third signal lines are in different layers. In one example, the respective first signal line is in the second signal line layer SD2, the respective second signal line is in the third signal line layer SD3, and the respective third signal line is in the first signal line layer SD1.
[0122] The display panel in some embodiments includes a via v exposing surfaces of the base substrate BS, the buffer layer BUF, the first gate insulating layer GI1, the second gate insulating layer GI2, and the inter-layer dielectric layer ILD. The first planarization layer PLN1 extends into the via v. The plurality of first signal lines and the plurality of second signal lines are at least partially on a side of the first planarization layer PLN1 away from the base substrate BS, and on a side of the second planarization layer PLN2 closer to the base substrate BS. The plurality of third signal lines are at least partially on a side of the first planarization layer PLN1 closer to the base substrate BS.
[0123] In some embodiments, the bending portion further includes one or more protrusions PT on a side of the first planarization layer PLN1 closer to the base substrate BS, and at least partially in the via v. Optionally, the one or more protrusions PT is in contact with the base substrate BS. Optionally, the one or more protrusions PT is in contact with the plurality of third signal lines. Optionally, the one or more protrusions PT is spaced apart from the buffer layer BUF, spaced apart from the first gate insulating layer GI1, spaced apart from the second gate insulating layer GI2, and spaced apart from the inter-layer dielectric layer ILD. Optionally, the first planarization layer PLN1 spaces apart the one or more protrusions PT from the buffer layer BUF, from the first gate insulating layer GI1, from the second gate insulating layer GI2, and from the inter-layer dielectric layer ILD.
[0124] In some embodiments, a respective first signal line of the plurality of first signal lines in the bending portion includes one or more first parts P2-1, one or more second parts P2-2, and one or more third parts P2-3. Optionally, a first part of the one or more first parts P2-1 is connected to a second part of the one or more second parts P2-2. Optionally, the second part of the one or more second parts P2-2 is connected to the first part of the one or more first parts P2-1 and connected to a third part of the one or more third parts P2-3.
[0125] In some embodiments, an orthographic projection of the third part of the one or more third parts P2-3 on a base substrate BS at least partially overlaps with an orthographic projection of a protrusion of the one or more protrusions PT on the base substrate BS.
[0126] In some embodiments, an orthographic projection of the second part of the one or more second parts P2-2 on the base substrate is at least partially non-overlapping with the orthographic projection of the protrusion of the one or more protrusions PT on the base substrate BS.
[0127] In some embodiments, an orthographic projection of the first part of the one or more first parts P2-1 on the base substrate is non-overlapping with the orthographic projection of the protrusion of the one or more protrusions PT on the base substrate BS.
[0128] In some embodiments, the first part of the one or more first parts P2-1 has a first minimum height h1 relative to a main surface of the base substrate BS, the second part of the one or more second parts P2-2 has a second minimum height h2 relative to the main surface of the base substrate BS, and the third part of the one or more third parts P2-3 has a third minimum height h3 relative to the main surface of the base substrate BS. Optionally, the first minimum height h1 is greater than the second minimum height h2. Optionally, the third minimum height h3 is greater than the second minimum height h2.
[0129] In one example depicted in FIG. 14, a total number of the one or more protrusions PT is one, a total number of the one or more third parts P2-3 is one, a total number of the one or more second parts P2-2 is two, and a total number of the one or more first parts P2-1 is two.
[0130] In some embodiments, a respective second signal line of the plurality of second signal lines in the bending portion includes one or more fourth parts P3-1, one or more fifth parts P3-2, and one or more sixth parts P3-3. Optionally, a fourth part of the one or more fourth parts P3-1 is connected to a fifth part of the one or more fifth parts P3-2. Optionally, the fifth part of the one or more fifth parts P3-2 is connected to the fourth part of the one or more fourth parts P3-1 and connected to a sixth part of the one or more sixth parts P3-3.
[0131] In some embodiments, an orthographic projection of the sixth part of the one or more sixth parts P3-3 on a base substrate BS at least partially overlaps with an orthographic projection of a protrusion of the one or more protrusions PT on the base substrate BS.
[0132] In some embodiments, an orthographic projection of the fifth part of the one or more fifth parts P3-2 on the base substrate is at least partially non-overlapping with the orthographic projection of the protrusion of the one or more protrusions PT on the base substrate BS.
[0133] In some embodiments, an orthographic projection of the fourth part of the one or more fourth parts P3-1 on the base substrate is non-overlapping with the orthographic projection of the protrusion of the one or more protrusions PT on the base substrate BS.
[0134] In some embodiments, the fourth part of the one or more fourth parts P3-1 has a fourth minimum height h4 relative to a main surface of the base substrate BS, the fifth part of the one or more fifth parts P3-2 has a fifth minimum height h5 relative to the main surface of the base substrate BS, and the sixth part of the one or more sixth parts P3-3 has a sixth minimum height h6 relative to the main surface of the base substrate BS. Optionally, the fourth minimum height h4 is greater than the fifth minimum height h5. Optionally, the sixth minimum height h6 is greater than the fifth minimum height h5.
[0135] In one example depicted in FIG. 14, a total number of the one or more protrusions PT is one, a total number of the one or sixth parts P3-3 is one, a total number of the one or more fifth parts P3-2 is two, and a total number of the one or more fourth parts P3-1 is two.
[0136] In some embodiments, a respective third signal line of the plurality of third signal lines in the bending portion includes one or more seventh parts P4-1, one or more eighth parts P4-2, and one or more ninth parts P4-3. Optionally, a seventh part of the one or more seventh parts P4-1 is connected to an eighth part of the one or more eighth parts P4-2. Optionally, the eighth part of the one or more eighth parts P4-2 is connected to the seventh part of the one or more seventh parts P4-1 and connected to a ninth part of the one or more ninth parts P4-3.
[0137] In some embodiments, an orthographic projection of the ninth part of the one or more ninth parts P4-3 on a base substrate BS at least partially overlaps with an orthographic projection of a protrusion of the one or more protrusions PT on the base substrate BS.
[0138] In some embodiments, an orthographic projection of the eighth part of the one or more eighth parts P4-2 on the base substrate is at least partially non-overlapping with the orthographic projection of the protrusion of the one or more protrusions PT on the base substrate BS.
[0139] In some embodiments, an orthographic projection of the seventh part of the one or more seventh parts P4-1 on the base substrate is non-overlapping with the orthographic projection of the protrusion of the one or more protrusions PT on the base substrate BS.
[0140] In some embodiments, the seventh part of the one or more seventh parts P4-1 has a seventh minimum height h7 relative to a main surface of the base substrate BS, the eighth part of the one or more eighth parts P4-2 has a eighth minimum height h8 relative to the main surface of the base substrate BS, and the ninth part of the one or more ninth parts P4-3 has a ninth minimum height h9 relative to the main surface of the base substrate BS. Optionally, the seventh minimum height h7 is greater than the eighth minimum height h8. Optionally, the ninth minimum height h9 is greater than the eighth minimum height h8.
[0141] In one example depicted in FIG. 14, a total number of the one or more protrusions PT is one, a total number of the one or ninth parts P4-3 is one, a total number of the one or more eighth parts P4-2 is two, and a total number of the one or more seventh parts P4-1 is two.
[0142] In some embodiments, the plurality of first signal lines and the plurality of second signal lines are alternately in the second signal line layer SD2 and the third signal line layer SD3, respectively.
[0143] The inventors of the present disclosure discover that, by having the plurality of first signal lines, the plurality of second signal lines, and the plurality of third signal lines in the second signal line layer SD2, the third signal line layer SD3, and the first signal line layer SD1, respectively, the stress in the bending portion can be reduced.
[0144] FIG. 15 is a schematic diagram illustrating the structure of a bending portion in a display panel in some embodiments according to the present disclosure. Referring to FIG. 15, the display panel in some embodiments includes a first panel portion PL1 (e.g., the display region DR depicted in FIG. 2) , the bending portion PBP, and a second panel portion PL2 (e.g., the connecting portion CP depicted in FIG. 2) connected together. In some embodiments, a first signal line of the plurality of first signal lines extends from the first panel portion PL1 into the bending portion PBP, and then into the second panel portion PL2. The first signal line in some embodiments includes a first signal line portion SL1 at least partially in the first panel portion PL1, a second signal line portion SL2 at least partially in the second panel portion PL2, and a third signal line portion SL3 at least partially in the bending portion PBP. The third signal line portion SL3 connects the first signal line portion SL1 with the second signal line portion SL2.
[0145] In some embodiments, the first signal line portion SL1 is at least partially in the first signal line layer, the second signal line portion SL2 is at least partially in the first signal line layer, and the third signal line portion SL3 is at least partially in the second signal line layer.
[0146] In some embodiments, an orthographic projection of the third signal line portion SL3 on the base substrate extends along a direction different from an orthographic projection of the first signal line portion SL1 on the base substrate. In some embodiments, an orthographic projection of the third signal line portion SL3 on the base substrate extends along a direction different from an orthographic projection of the second signal line portion SL2 on the base substrate. In one example, the orthographic projection of the first signal line portion SL1 on the base substrate and the orthographic projection of the second signal line portion SL2 on the base substrate extend along a first direction DR1; the orthographic projection of the third signal line portion SL3 on the base substrate extends along a second direction DR2. The second direction DR2 is different from the first direction DR1.
[0147] In some embodiments, a second signal line of the plurality of second signal lines extends from the first panel portion PL1 into the bending portion PBP, and then into the second panel portion PL2. The second signal line in some embodiments includes a fourth signal line portion SL4 at least partially in the first panel portion PL1, a fifth signal line portion SL5 at least partially in the second panel portion PL2, and a sixth signal line portion SL6 at least partially in the bending portion PBP. The sixth signal line portion SL6 connects the fourth signal line portion SL4 with the fifth signal line portion SL5.
[0148] In some embodiments, the fourth signal line portion SL4 is at least partially in the first signal line layer, the fifth signal line portion SL5 is at least partially in the first signal line layer, and the sixth signal line portion SL6 is at least partially in the third signal line layer.
[0149] In some embodiments, an orthographic projection of the sixth signal line portion SL6 on the base substrate extends along a direction different from an orthographic projection of the fourth signal line portion SL4 on the base substrate. In some embodiments, an orthographic projection of the sixth signal line portion SL6 on the base substrate extends along a direction different from an orthographic projection of the fifth signal line portion SL5 on the base substrate. In one example, the orthographic projection of the fourth signal line portion SL4 on the base substrate and the orthographic projection of the fifth signal line portion SL5 on the base substrate extend along a first direction DR1; the orthographic projection of the sixth signal line portion SL6 on the base substrate extends along a third direction DR3. The third direction DR3 is different from the first direction DR1. Optionally, the third direction DR3 is different from the second direction DR2.
[0150] In some embodiments, a third signal line of the plurality of third signal lines extends from the first panel portion PL1 into the bending portion PBP, and then into the second panel portion PL2. The third signal line in some embodiments includes a seventh signal line portion SL7 at least partially in the first panel portion PL1, an eighth signal line portion SL8 at least partially in the second panel portion PL2, and a ninth signal line portion SL9 at least partially in the bending portion PBP. The ninth signal line portion SL9 connects the seventh signal line portion SL7 with the eighth signal line portion SL8.
[0151] In some embodiments, the seventh signal line portion SL7 is at least partially in the first signal line layer, the eighth signal line portion SL8 is at least partially in the first signal line layer, and the ninth signal line portion SL9 is at least partially in the first signal line layer.
[0152] In some embodiments, an orthographic projection of the ninth signal line portion SL9 on the base substrate extends along a direction different from an orthographic projection of the seventh signal line portion SL7 on the base substrate. In some embodiments, an orthographic projection of the ninth signal line portion SL9 on the base substrate extends along a direction different from an orthographic projection of the eighth signal line portion SL8 on the base substrate. In one example, the orthographic projection of the seventh signal line portion SL7 on the base substrate and the orthographic projection of the eighth signal line portion SL8 on the base substrate extend along a first direction DR1; the orthographic projection of the ninth signal line portion SL9 on the base substrate extends along a fourth direction DR4. The fourth direction DR4 is different from the first direction DR1. Optionally, the fourth direction DR4 is different from the second direction DR2. Optionally, the fourth direction DR4 is the same as the third direction DR3.
[0153] In one example depicted in FIG. 15, at least two of orthographic projections of the plurality of first signal lines extend along a same direction. In another example, at least two of orthographic projections of the plurality of second signal lines extend along a same direction. In another example, at least two of orthographic projections of the plurality of third signal lines extend along a same direction.
[0154] In another example, orthographic projections of the plurality of first signal lines extend along a same direction. In another example, orthographic projections of the plurality of second signal lines extend along a same direction. In another example, orthographic projections of the plurality of third signal lines extend along a same direction.
[0155] FIG. 16 is a schematic diagram illustrating the structure of a bending portion in a display panel in some embodiments according to the present disclosure. Referring to FIG. 16, the display panel in some embodiments includes a first panel portion PL1 (e.g., the display region DR depicted in FIG. 2) , the bending portion PBP, and a second panel portion PL2 (e.g., the connecting portion CP depicted in FIG. 2) connected together. In some embodiments, a first signal line of the plurality of first signal lines extends from the first panel portion PL1 into the bending portion PBP, and then into the second panel portion PL2. The first signal line in some embodiments includes a first signal line portion SL1 at least partially in the first panel portion PL1, a second signal line portion SL2 at least partially in the second panel portion PL2, and a third signal line portion SL3 at least partially in the bending portion PBP. The third signal line portion SL3 connects the first signal line portion SL1 with the second signal line portion SL2.
[0156] In some embodiments, the first signal line portion SL1 is at least partially in the first signal line layer, the second signal line portion SL2 is at least partially in the first signal line layer, and the third signal line portion SL3 is at least partially in the second signal line layer.
[0157] In some embodiments, an orthographic projection of the third signal line portion SL3 on the base substrate extends along a direction different from an orthographic projection of the first signal line portion SL1 on the base substrate. In some embodiments, an orthographic projection of the third signal line portion SL3 on the base substrate extends along a direction different from an orthographic projection of the second signal line portion SL2 on the base substrate. In one example, the orthographic projection of the first signal line portion SL1 on the base substrate and the orthographic projection of the second signal line portion SL2 on the base substrate extend along a first direction DR1; the orthographic projection of the third signal line portion SL3 on the base substrate extends along a second direction DR2. The second direction DR2 is different from the first direction DR1.
[0158] In some embodiments, a second signal line of the plurality of second signal lines extends from the first panel portion PL1 into the bending portion PBP, and then into the second panel portion PL2. The second signal line in some embodiments includes a fourth signal line portion SL4 at least partially in the first panel portion PL1, a fifth signal line portion SL5 at least partially in the second panel portion PL2, and a sixth signal line portion SL6 at least partially in the bending portion PBP. The sixth signal line portion SL6 connects the fourth signal line portion SL4 with the fifth signal line portion SL5.
[0159] In some embodiments, the fourth signal line portion SL4 is at least partially in the first signal line layer, the fifth signal line portion SL5 is at least partially in the first signal line layer, and the sixth signal line portion SL6 is at least partially in the third signal line layer.
[0160] In some embodiments, an orthographic projection of the sixth signal line portion SL6 on the base substrate extends along a direction different from an orthographic projection of the fourth signal line portion SL4 on the base substrate. In some embodiments, an orthographic projection of the sixth signal line portion SL6 on the base substrate extends along a direction different from an orthographic projection of the fifth signal line portion SL5 on the base substrate. In one example, the orthographic projection of the fourth signal line portion SL4 on the base substrate and the orthographic projection of the fifth signal line portion SL5 on the base substrate extend along a first direction DR1; the orthographic projection of the sixth signal line portion SL6 on the base substrate extends along a third direction DR3. The third direction DR3 is different from the first direction DR1. Optionally, the third direction DR3 is the same as the second direction DR2.
[0161] In some embodiments, a third signal line of the plurality of third signal lines extends from the first panel portion PL1 into the bending portion PBP, and then into the second panel portion PL2. The third signal line in some embodiments includes a seventh signal line portion SL7 at least partially in the first panel portion PL1, an eighth signal line portion SL8 at least partially in the second panel portion PL2, and a ninth signal line portion SL9 at least partially in the bending portion PBP. The ninth signal line portion SL9 connects the seventh signal line portion SL7 with the eighth signal line portion SL8.
[0162] In some embodiments, the seventh signal line portion SL7 is at least partially in the first signal line layer, the eighth signal line portion SL8 is at least partially in the first signal line layer, and the ninth signal line portion SL9 is at least partially in the first signal line layer.
[0163] In some embodiments, an orthographic projection of the ninth signal line portion SL9 on the base substrate extends along a direction different from an orthographic projection of the seventh signal line portion SL7 on the base substrate. In some embodiments, an orthographic projection of the ninth signal line portion SL9 on the base substrate extends along a direction different from an orthographic projection of the eighth signal line portion SL8 on the base substrate. In one example, the orthographic projection of the seventh signal line portion SL7 on the base substrate and the orthographic projection of the eighth signal line portion SL8 on the base substrate extend along a first direction DR1; at least a portion the orthographic projection of the ninth signal line portion SL9 on the base substrate extends along a fourth direction DR4. The fourth direction DR4 is different from the first direction DR1. Optionally, the fourth direction DR4 is different from the second direction DR2. Optionally, the fourth direction DR4 is different from the third direction DR3.
[0164] [Rectified under Rule 91, 13.12.2024]In one example depicted in FIG. 16, at least two of orthographic projections of the plurality of first signal lines extend along a same direction. In another example, at least two of orthographic projections of the plurality of second signal lines extend along a same direction. In another example, at least two of orthographic projections of the plurality of third signal lines extend along a same direction.
[0165] In another example, orthographic projections of the plurality of first signal lines extend along a same direction. In another example, orthographic projections of the plurality of second signal lines extend along a same direction. In another example, orthographic projections of the plurality of third signal lines extend along a same direction.
[0166] In some embodiments, the ninth signal line portion SL9 extends first along the first direction DR1, then along the fourth direction DR4, and then along the first direction DR1.
[0167] In another aspect, the present invention provides a display apparatus, including the display panel described herein or fabricated by a method described herein, and one or more integrated circuits connected to the display panel. Examples of appropriate display apparatuses include, but are not limited to, an electronic paper, a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital album, a GPS, etc. Optionally, the display apparatus is an organic light emitting diode display apparatus. Optionally, the display apparatus is a micro light emitting diode display apparatus. Optionally, the display apparatus is a mini light emitting diode display apparatus.
[0168] In another aspect, the present disclosure provides a method of fabricating a display panel. In some embodiments, the method includes forming a bending portion. Optionally, forming the bending portion includes forming one or more signal lines; and forming one or more protrusions on a side of a first planarization layer closer to a base substrate. Optionally, forming a signal line of the one or more signal lines includes forming one or more first parts, forming one or more second parts, and forming one or more third parts. Optionally, an orthographic projection of a third part of the one or more third parts on the base substrate at least partially overlaps with an orthographic projection of a protrusion of the one or more protrusions on the base substrate. Optionally, an orthographic projection of a second part of the one or more second parts on the base substrate is at least partially non-overlapping with the orthographic projection of the protrusion of the one or more protrusions on the base substrate. Optionally, an orthographic projection of a first part of the one or more first parts on the base substrate is non-overlapping with the orthographic projection of the protrusion of the one or more protrusions on the base substrate.
[0169] The foregoing description of the embodiments of the invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form or to exemplary embodiments disclosed. Accordingly, the foregoing description should be regarded as illustrative rather than restrictive. Obviously, many modifications and variations will be apparent to practitioners skilled in this art. The embodiments are chosen and described in order to explain the principles of the invention and its best mode practical application, thereby to enable persons skilled in the art to understand the invention for various embodiments and with various modifications as are suited to the particular use or implementation contemplated. It is intended that the scope of the invention be defined by the claims appended hereto and their equivalents in which all terms are meant in their broadest reasonable sense unless otherwise indicated. Therefore, the term “the invention” , “the present invention” or the like does not necessarily limit the claim scope to a specific embodiment, and the reference to exemplary embodiments of the invention does not imply a limitation on the invention, and no such limitation is to be inferred. The invention is limited only by the spirit and scope of the appended claims. Moreover, these claims may refer to use “first” , “second” , etc. following with noun or element. Such terms should be understood as a nomenclature and should not be construed as giving the limitation on the number of the elements modified by such nomenclature unless specific number has been given. Any advantages and benefits described may not apply to all embodiments of the invention. It should be appreciated that variations may be made in the embodiments described by persons skilled in the art without departing from the scope of the present invention as defined by the following claims. Moreover, no element and component in the present disclosure is intended to be dedicated to the public regardless of whether the element or component is explicitly recited in the following claims.
Claims
A display panel, comprising a base substrate, a first planarization layer on the base substrate, and a bending portion;wherein the bending portion comprises:one or more signal lines; andone or more protrusions on a side of the first planarization layer closer to a base substrate;wherein a signal line of the one or more signal lines comprises one or more first parts, one or more second parts, and one or more third parts;an orthographic projection of a third part of the one or more third parts on the base substrate at least partially overlaps with an orthographic projection of a protrusion of the one or more protrusions on the base substrate;an orthographic projection of a second part of the one or more second parts on the base substrate is at least partially non-overlapping with the orthographic projection of the protrusion of the one or more protrusions on the base substrate; andan orthographic projection of a first part of the one or more first parts on the base substrate is non-overlapping with the orthographic projection of the protrusion of the one or more protrusions on the base substrate.The display panel of claim 1, wherein the display panel further comprises a buffer layer, a first gate insulating layer, a second gate insulating layer, and an inter-layer dielectric layer sequentially stacked, and between the base substrate and the first planarization layer;wherein the display panel further comprises a via exposing a surface of at least one of the base substrate, the buffer layer, the first gate insulating layer, the second gate insulating layer, or the inter-layer dielectric layer;wherein the one or more protrusions are at least partially in the via; andthe first planarization layer at least partially extends into the via.The display panel of claim 1, wherein the first part of the one or more first parts has a first minimum height relative to a main surface of the base substrate;the second part of the one or more second parts has a second minimum height relative to the main surface of the base substrate;the third part of the one or more third parts has a third minimum height relative to the main surface of the base substrate;the first minimum height is greater than the second minimum height; andthe third minimum height is greater than the second minimum height.The display panel of claim 1, wherein a total number of the one or more protrusions is one; anda total number of the one or more third parts is one.The display panel of claim 1, wherein a total number of the one or more protrusions is greater than one; anda total number of the one or more third parts is greater than one.The display panel of any one of claims 1 to 5, comprises a first panel portion, the bending portion, and a second panel portion sequentially connected together;wherein a respective signal line of the one or more signal lines extends from the first panel portion into the bending portion, and then into the second panel portion;the respective signal line comprises a first signal line portion at least partially in the first panel portion, a second signal line portion at least partially in the second panel portion, and a third signal line portion at least partially in the bending portion;the third signal line portion connects the first signal line portion with the second signal line portion;the first signal line portion is at least partially in the first signal line layer;the second signal line portion is at least partially in the first signal line layer; andthe third signal line portion is at least partially in the second signal line layer.The display panel of claim 6, wherein orthographic projections of the first signal line portion, the second signal line portion, and the third signal line portion on the base substrate extend along a same direction.The display panel of claim 6, wherein an orthographic projection of the first signal line portion on the base substrate and an orthographic projection of the second signal line portion on the base substrate extend along a first direction;an orthographic projection of the third signal line portion on the base substrate extends along a second direction; andthe second direction is different from the first direction.The display panel of any one of claims 1 to 8, wherein the one or more signal lines in the bending portion comprise a plurality of first signal lines and a plurality of second signal lines;a respective first signal line of the plurality of first signal lines and a respective second signal line of the plurality of second signal lines are in different layers;the respective first signal line comprises the one or more first parts, the one or more second parts, and the one or more third parts;the respective second signal line comprises one or more fourth parts, one or more fifth parts, and one or more sixth parts;an orthographic projection of a sixth part of the one or more sixth parts on the base substrate at least partially overlaps with an orthographic projection of a protrusion of the one or more protrusions on the base substrate;an orthographic projection of a fifth part of the one or more fifth parts on the base substrate is at least partially non-overlapping with the orthographic projection of the protrusion of the one or more protrusions on the base substrate; andan orthographic projection of the fourth part of the one or more fourth parts on the base substrate is non-overlapping with the orthographic projection of the protrusion of the one or more protrusions on the base substrate.The display panel of claim 9, wherein the first part of the one or more first parts has a first minimum height relative to a main surface of the base substrate;the second part of the one or more second parts has a second minimum height relative to the main surface of the base substrate;the third part of the one or more third parts has a third minimum height relative to the main surface of the base substrate;the fourth part of the one or more fourth parts has a fourth minimum height relative to the main surface of the base substrate;the fifth part of the one or more fifth parts has a fifth minimum height relative to the main surface of the base substrate;the sixth part of the one or more sixth parts has a sixth minimum height relative to the main surface of the base substrate;the first minimum height is greater than the second minimum height;the third minimum height is greater than the second minimum height;the fourth minimum height is greater than the fifth minimum height; andthe sixth minimum height is greater than the fifth minimum height.The display panel of claim 9, comprises a first panel portion, the bending portion, and a second panel portion connected together;a first signal line of the plurality of first signal lines extends from the first panel portion into the bending portion, and then into the second panel portion;the first signal line comprises a first signal line portion at least partially in the first panel portion, a second signal line portion at least partially in the second panel portion, and a third signal line portion at least partially in the bending portion;the third signal line portion connects the first signal line portion with the second signal line portion;the first signal line portion is at least partially in the first signal line layer;the second signal line portion is at least partially in the first signal line layer;the third signal line portion is at least partially in the second signal line layer;a second signal line of the plurality of second signal lines extends from the first panel portion into the bending portion, and then into the second panel portion;the second signal line comprises a fourth signal line portion at least partially in the first panel portion, a fifth signal line portion at least partially in the second panel portion, and a sixth signal line portion at least partially in the bending portion;the sixth signal line portion connects the fourth signal line portion with the fifth signal line portion;the fourth signal line portion is at least partially in the first signal line layer;the fifth signal line portion is at least partially in the first signal line layer; andthe sixth signal line portion is at least partially in the third signal line layer.The display panel of claim 11, wherein an orthographic projection of the first signal line portion on the base substrate, an orthographic projection of the second signal line portion on the base substrate, an orthographic projection of the fourth signal line portion on the base substrate, and an orthographic projection of the fifth signal line portion on the base substrate, extend along a first direction;an orthographic projection of the third signal line portion on the base substrate extends along a second direction;an orthographic projection of the sixth signal line portion on the base substrate extends along a third direction;the second direction is different from the first direction;the third direction is different from the first direction; andthe third direction is different from the second direction.The display panel of claim 12, wherein orthographic projections of the plurality of first signal lines extend along different directions; andorthographic projections of the plurality of second signal lines extend along different directions.The display panel of claim 12, wherein orthographic projections of the plurality of first signal lines extend along a same direction; andorthographic projections of the plurality of second signal lines extend along a same direction.The display panel of any one of claims 1 to 8, wherein the one or more signal lines in the bending portion comprise a plurality of first signal lines, a plurality of second signal lines, and a plurality of third signal lines;a respective first signal line of the plurality of first signal lines, a respective second signal line of the plurality of second signal lines, and a respective third signal line of the plurality of third signal lines are in different layers;the respective first signal line comprises the one or more first parts, the one or more second parts, and the one or more third parts;the respective second signal line comprises one or more fourth parts, one or more fifth parts, and one or more sixth parts;the respective third signal line comprises one or more seventh parts, one or more eighth parts, and one or more ninth parts;an orthographic projection of a sixth part of the one or more sixth parts on the base substrate at least partially overlaps with an orthographic projection of a protrusion of the one or more protrusions on the base substrate;an orthographic projection of a fifth part of the one or more fifth parts on the base substrate is at least partially non-overlapping with the orthographic projection of the protrusion of the one or more protrusions on the base substrate;an orthographic projection of the fourth part of the one or more fourth parts on the base substrate is non-overlapping with the orthographic projection of the protrusion of the one or more protrusions on the base substrate;an orthographic projection of the ninth part of the one or more ninth parts on the base substrate at least partially overlaps with an orthographic projection of a protrusion of the one or more protrusions on the base substrate;an orthographic projection of the eighth part of the one or more eighth parts on the base substrate is at least partially non-overlapping with the orthographic projection of the protrusion of the one or more protrusions on the base substrate; andan orthographic projection of the seventh part of the one or more seventh parts on the base substrate is non-overlapping with the orthographic projection of the protrusion of the one or more protrusions on the base substrate.The display panel of claim 15, wherein the first part of the one or more first parts has a first minimum height relative to a main surface of the base substrate;the second part of the one or more second parts has a second minimum height relative to the main surface of the base substrate;the third part of the one or more third parts has a third minimum height relative to the main surface of the base substrate;the fourth part of the one or more fourth parts has a fourth minimum height relative to the main surface of the base substrate;the fifth part of the one or more fifth parts has a fifth minimum height relative to the main surface of the base substrate;the sixth part of the one or more sixth parts has a sixth minimum height relative to the main surface of the base substrate;the seventh part of the one or more seventh parts has a seventh minimum height relative to the main surface of the base substrate;the eighth part of the one or more eighth parts has a eighth minimum height relative to the main surface of the base substrate;the ninth part of the one or more ninth parts has a ninth minimum height relative to the main surface of the base substrate;the first minimum height is greater than the second minimum height;the third minimum height is greater than the second minimum height;the fourth minimum height is greater than the fifth minimum height;the sixth minimum height is greater than the fifth minimum height;the seventh minimum height is greater than the eighth minimum height; andthe ninth minimum height is greater than the eighth minimum height.The display panel of claim 16, comprises a first panel portion, the bending portion, and a second panel portion connected together;a first signal line of the plurality of first signal lines extends from the first panel portion into the bending portion, and then into the second panel portion;the first signal line comprises a first signal line portion at least partially in the first panel portion, a second signal line portion at least partially in the second panel portion, and a third signal line portion at least partially in the bending portion;the third signal line portion connects the first signal line portion with the second signal line portion;the first signal line portion is at least partially in the first signal line layer;the second signal line portion is at least partially in the first signal line layer;the third signal line portion is at least partially in the second signal line layer;a second signal line of the plurality of second signal lines extends from the first panel portion into the bending portion, and then into the second panel portion;the second signal line comprises a fourth signal line portion at least partially in the first panel portion, a fifth signal line portion at least partially in the second panel portion, and a sixth signal line portion at least partially in the bending portion;the sixth signal line portion connects the fourth signal line portion with the fifth signal line portion;the fourth signal line portion is at least partially in the first signal line layer;the fifth signal line portion is at least partially in the first signal line layer;the sixth signal line portion is at least partially in the third signal line layer;a third signal line of the plurality of third signal lines extends from the first panel portion into the bending portion, and then into the second panel portion;the third signal line comprises a seventh signal line portion at least partially in the first panel portion, an eighth signal line portion at least partially in the second panel portion, and a ninth signal line portion at least partially in the bending portion;the ninth signal line portion connects the seventh signal line portion with the eighth signal line portion;the seventh signal line portion is at least partially in the first signal line layer;the eighth signal line portion is at least partially in the first signal line layer; andthe ninth signal line portion is at least partially in the first signal line layer.The display panel of claim 17, wherein an orthographic projection of the first signal line portion on the base substrate, an orthographic projection of the second signal line portion on the base substrate, an orthographic projection of the fourth signal line portion on the base substrate, an orthographic projection of the fifth signal line portion on the base substrate, an orthographic projection of the seventh signal line portion on the base substrate, and an orthographic projection of the eighth signal line portion on the base substrate extend along a first direction;an orthographic projection of the third signal line portion on the base substrate extends along a second direction;an orthographic projection of the sixth signal line portion on the base substrate extends along a third direction;an orthographic projection of at least a portion of the ninth signal line portion on the base substrate extends along a fourth direction;the second direction is different from the first direction;the third direction is different from the first direction;the third direction is the same as the second direction;the fourth direction is different from the first direction; andthe fourth direction is different from the second direction.The display panel of claim 18, wherein the ninth signal line portion extends first along the first direction, then along the fourth direction, and then along the first direction.A display apparatus, comprising the display panel of any one of claims 1 to 19, and one or more integrated circuits connected to the display panel.