EP-4739033-A1 - DISPLAY PANEL AND DISPLAY DEVICE

EP4739033A1EP 4739033 A1EP4739033 A1EP 4739033A1EP-4739033-A1

Abstract

The disclosure provides a display panel and a display device. The display panel includes a substrate; an active layer located on a side of the substrate; multiple metal layers located on a side of the active layer away from the substrate, the multiple metal layers including a first metal layer and a second metal layer, the first metal layer including a physical part and a plurality of openings, the second metal layer including a physical part and a plurality of openings; and a first shielding area, where at least a portion of the active layer is located within the first shielding area, and in a direction perpendicular to a plane where the substrate is located, at least one of the physical part of the first metal layer and the physical part of the second metal layer covers the first shielding area.

Inventors

MENG, Fanqing
JIA, ZHENYU
YANG, BO

Assignees

Tianma Advanced Display Technology Institute (Xiamen) Co., Ltd.

Dates

Publication Date: 20260506
Application Date: 20251030

Claims (20)

A display panel, characterized by comprising: a substrate; an active layer located on a side of the substrate; and multiple metal layers located on a side of the active layer away from the substrate, the multiple metal layers comprising a first metal layer and a second metal layer, the first metal layer comprising a physical part and a plurality of openings of the first metal layer, the second metal layer comprising a physical part and a plurality of openings of the second metal layer; wherein the display panel comprises a first shielding area, at least a portion of the active layer is located within the first shielding area, and in a direction perpendicular to a plane where the substrate is located, at least one of the physical part of the first metal layer and the physical part of the second metal layer covers the first shielding area.
The display panel according to claim 1, wherein an insulating layer is provided between the first metal layer and the second metal layer, and the insulating layer is an organic material layer.
The display panel according to claim 1, further comprising: a plurality of pixel circuits; wherein the active layer comprises a first active portion, the plurality of pixel circuits comprises the first active portion, and the first active portion is located within the first shielding area.
The display panel according to claim 3, wherein: the physical part of the first metal layer comprises a first power supply structure, and the first power supply structure is configured to provide a first power supply voltage; the physical part of the second metal layer comprises a second power supply structure, and the second power supply structure is configured to provide a second power supply voltage; and the display panel comprises a plurality of light emitting diodes, the first power supply structure is electrically connected to the plurality of pixel circuits, the plurality of pixel circuits is electrically connected to first electrodes of the plurality of light emitting diodes, and the second power supply structure is electrically connected to second electrodes of the plurality of light emitting diodes.
The display panel according to claim 4, wherein a pixel circuit of the plurality of pixel circuits comprises a pulse width module and an amplitude module, and the first power supply structure is electrically connected to the amplitude module of the pixel circuit of the plurality of pixel circuits.
The display panel according to claim 4, wherein: at least two pixel circuits of the plurality of pixel circuits form a pixel circuit group, and first active portions of the pixel circuit group are located in the first shielding area; the pixel circuit group is arranged in rows along a first direction, and a plurality of rows of pixel circuit groups are arranged along a second direction, the first direction and the second direction intersect, and the first direction and the second direction are parallel to the plane where the substrate is located; in the direction perpendicular to the plane where the substrate is located, the first power supply structure at least partially overlaps with four pixel circuit groups comprising two adjacent rows of pixel circuit groups and two adjacent columns of pixel circuit groups of the first power supply structure; and in the direction perpendicular to the plane where the substrate is located, the second power supply structure at least partially overlaps with four pixel circuit groups comprising two adjacent rows of pixel circuit groups and two adjacent columns of pixel circuit groups the second power supply structure.
The display panel according to claim 6, wherein: the plurality of openings of the first metal layer comprises a plurality of first openings; the plurality of openings of the second metal layer comprises a plurality of second openings; and in the first shielding area, first openings of the plurality of first openings and second openings of the plurality of second openings do not overlap in the direction perpendicular to the plane where the substrate is located.
The display panel according to claim 7, wherein: in at least a portion of the first shielding area, first openings of the plurality of first openings are arranged in columns along the second direction, a plurality of columns of first openings of the plurality of first openings are arranged along the first direction, first openings of the plurality of first openings in alternate columns overlap along the first direction, and first openings of the plurality of first openings in adjacent columns overlap along the first direction or the first openings of the plurality of first openings in adjacent columns at least partially do not overlap along the first direction; and/or in at least a portion of the first shielding area, second openings of the plurality of second openings are arranged in columns along the second direction, a plurality of columns of the second openings of the plurality of second openings are arranged along the first direction, second openings of the plurality of second openings in alternate columns overlap along the first direction, and second openings of the plurality of second openings in adjacent columns overlap along the first direction or the second openings of the plurality of second openings in adjacent columns at least partially do not overlap along the first direction.
The display panel according to claim 7, wherein: in at least a portion of the first shielding area, first openings of the plurality of first openings are arranged in columns along the second direction, a plurality of columns of first openings of the plurality of first openings are arranged along the first direction, first openings of the plurality of first openings in adjacent columns overlap along the first direction, and first openings of the plurality of first openings in alternate columns overlap along the first direction; and/or in at least a portion of the first shielding area, second openings of the plurality of second openings are arranged in columns along the second direction, a plurality of columns of second openings of the plurality of second openings are arranged along the first direction, second openings of the plurality of second openings in adjacent columns overlap along the first direction, and second openings of the plurality of second openings in alternate columns overlap along the first direction.
The display panel according to claim 7, wherein: the physical part of the second metal layer further comprises a first auxiliary electrode, and a third opening is provided between the first auxiliary electrode and the second power structure; the first auxiliary electrode is electrically connected to the plurality of pixel circuits, and the first auxiliary electrode is electrically connected to the first electrodes of the plurality of light emitting diodes; and the first auxiliary electrode and a second power structure between two adjacent first auxiliary electrodes are provided with a plurality of fourth openings, and an area of a fourth opening of the plurality of fourth openings is smaller than an area of a second opening of the plurality of second openings.
The display panel according to claim 10, wherein: in the direction perpendicular to the plane where the substrate is located, a plurality of fifth openings are provided at a portion where the first power structure overlaps with the first auxiliary electrode and the second power structure between two adjacent first auxiliary electrodes; the plurality of fifth openings are arranged in columns along the second direction, a plurality of columns of fifth openings of the plurality of fifth openings are arranged along the first direction, fifth openings of the plurality of fifth openings in adjacent columns overlap along the first direction, and fifth openings of the plurality of fifth openings in alternate columns overlap along the first direction; and orthographic projections of the fourth openings of the plurality of fourth openings on the first metal layer are alternately arranged with the fifth openings of the plurality of fifth openings along the second direction.
The display panel according to claim 10, wherein: the physical part of the first metal layer further comprises a second auxiliary electrode, and a sixth opening is provided between the second auxiliary electrode and the first power structure; and in the direction perpendicular to the plane where the substrate is located, the first auxiliary electrode and the second auxiliary electrode at least partially overlap, the first auxiliary electrode and the second auxiliary electrode are electrically connected, and the second auxiliary electrode is electrically connected to the plurality of pixel circuits.
The display panel according to claim 12, wherein: the sixth opening is located outside the first shielding area; or the sixth opening is located within the first shielding area, and in the direction perpendicular to the plane where the substrate is located, the sixth opening does not overlap with the active layer.
The display panel according to claim 12, wherein: at least two light emitting diodes of the plurality of light emitting diodes form a light emitting element group, and one pixel circuit group is electrically connected to one light emitting element group; in the direction perpendicular to the plane where the substrate is located, the pixel circuit group and a light emitting element group electrically connected with the pixel circuit group at least partially do not overlap along the second direction; and in the direction perpendicular to the plane where the substrate is located, the first auxiliary electrode and the second auxiliary electrode overlap in the first shielding area, the second auxiliary electrode and the sixth opening are at least partially located outside the first shielding area, and the sixth opening does not overlap with the active layer.
The display panel according to claim 4, wherein: the first power structure comprises a first connection portion, and the first connection portion is electrically connected to the plurality of pixel circuits; and at least a portion of the first connecting portion protrudes toward an opening of the first metal layer.
The display panel according to claim 1, wherein in the first shielding area, a minimum distance d between an orthographic projection of an opening of the second metal layer on the first metal layer and an opening of the first metal layer satisfies: d ≥ X 1 + X 2 2 + Y 2 + H 2 , wherein, X1 is a line width difference between a design pattern and an actual production pattern of the first metal layer, X2 is a line width difference between a design pattern and an actual production pattern of the second metal layer, Y is a fitting accuracy between the first metal layer and the second metal layer, and H is a thickness of the insulating layer between the first metal layer and the second metal layer.
The display panel according to claim 7, wherein: a wiring area is provided on at least one side of the pixel circuit group along the first direction, and the wiring area comprises a signal line extending along the second direction; the plurality of openings of the first metal layer further comprises a plurality of seventh openings, and an area of a seventh opening of the plurality of seventh openings is greater than an area of a first opening of the plurality of first openings; and in the wiring area, the plurality of seventh openings are arranged along the second direction.
The display panel according to claim 17, wherein along the second direction, the plurality of seventh openings and the plurality of first openings are alternatingly arranged.
The display panel according to claim 7, wherein: a wiring area is provided on at least one side of the pixel circuit group along the first direction, and the wiring area comprises a signal line extending along the second direction; the plurality of openings of the second metal layer further comprises a plurality of eighth openings, and an area of an eighth opening of the plurality of eighth openings is greater than an area of a second opening of the plurality of second openings; and in the wiring area, the plurality of eighth openings are arranged along the second direction.
The display panel according to claim 19, wherein along the second direction, the plurality of eighth openings and the plurality of the second openings are alternatingly arranged.

Description

TECHNICAL FIELD The present disclosure generally relates to the field of display technology, and in particular to a display panel and a display device. BACKGROUND Light emitting diode (LED) display panels, such as micro-LED display panels and mini-LED display panels, have many advantages such as self-luminescence, low driving voltage, high luminous efficiency, short response time, high clarity and contrast, etc. LED display panels thus have gradually become a research hotspot in the field of display technology. When preparing a light emitting diode display panel, a light emitting diode needs to be fixed to an array substrate by laser bonding technology. Since the array substrate includes an active layer, when laser bonding the light emitting diode, it is easy to affect at least part of the active layer, thereby affecting the performance of a thin film transistor that includes the at least part of the active layer. SUMMARY To solve the above technical problems, the embodiments of the present disclosure provide a display panel and a display device to avoid affecting at least part of the active layer in the array substrate when laser bonding light emitting diodes, thereby avoiding affecting the performance of a thin film transistor that includes at least part of the active layer. In one aspect, an embodiment of the present disclosure provides a display panel, and the display panel includes: a substrate; an active layer located on a side of the substrate; multiple metal layers located on a side of the active layer away from the substrate, the multiple metal layers including a first metal layer and a second metal layer, the first metal layer including a physical part and multiple openings of the first metal layer, the second metal layer including a physical part and multiple openings of the second metal layer; and a first shielding area, where at least a part of the active layer is located within the first shielding area, and in a direction perpendicular to a plane where the substrate is located, at least one of the physical part of the first metal layer and the physical part of the second metal layer covers the first shielding area. In an embodiment, an insulating layer is provided between the first metal layer and the second metal layer, and the insulating layer is an organic material layer. In an embodiment, the display panel further includes: multiple pixel circuits, where the active layer includes a first active portion, the multiple pixel circuits includes the first active portion, and the first active portion is located within the first shielding area. In an embodiment, the physical part of the first metal layer includes a first power supply structure, and the first power supply structure is configured to provide a first power supply voltage; the physical part of the second metal layer includes a second power supply structure, and the second power supply structure is configured to provide a second power supply voltage; and the display panel includes multiple light emitting diodes, the first power supply structure is electrically connected to the multiple pixel circuits, the multiple pixel circuits is electrically connected to first electrodes of the multiple light emitting diodes, and the second power supply structure is electrically connected to second electrodes of the multiple light emitting diodes. In an embodiment, a pixel circuit of the multiple pixel circuits includes a pulse width module and an amplitude module, and the first power supply structure is electrically connected to the amplitude module of the pixel circuit of the multiple pixel circuits. In an embodiment, at least two pixel circuits of the multiple pixel circuits form a pixel circuit group, and first active portions of the pixel circuit group are located in the first shielding area; the pixel circuit group is arranged in rows along a first direction, and multiple rows of pixel circuit groups are arranged along a second direction, the first direction and the second direction intersect, and the first direction and the second direction are parallel to the plane where the substrate is located; in the direction perpendicular to the plane where the substrate is located, the first power supply structure at least partially overlaps with four pixel circuit groups including two adjacent rows of pixel circuit groups and two adjacent columns of pixel circuit groups of the first power supply structure; and in the direction perpendicular to the plane where the substrate is located, the second power supply structure at least partially overlaps with four pixel circuit groups including two adjacent rows of pixel circuit groups and two adjacent columns of pixel circuit groups the second power supply structure. In an embodiment, the multiple openings of the first metal layer includes multiple first openings; the multiple openings of the second metal layer includes multiple second openings; and in the first shielding area, first openings of the multiple f