CN-121728928-B - Display panel and display device

CN121728928BCN 121728928 BCN121728928 BCN 121728928BCN-121728928-B

Abstract

The embodiment of the disclosure provides a display panel and a display device, which relate to the technical field of display and are used for improving the extrusion resistance of a transfer area, wherein the display panel comprises a display area, a frame area, a binding area, a substrate, a grid layer and a source drain metal layer, wherein the frame area is positioned on at least one side of the display area; the display panel further comprises a supporting layer, wherein the supporting layer is provided with an outer boundary in orthographic projection to the substrate, the region where the first signal lines are electrically connected with the second signal lines is located in the region surrounded by the outer boundary of the supporting layer, and the display panel is used for displaying images.

Inventors

YU CHI
LIANG KE
ZHANG TONG
YUAN XIAOMIN
YANG ZHONGLIU
WANG MENGQI
HUANG PINGAN
ZHENG HAI
HUANG YINGLONG

Assignees

京东方科技集团股份有限公司
成都京东方光电科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260206

Claims (20)

1. A display panel, comprising: The display device comprises a display area and a frame area positioned on at least one side of the display area; The binding area is positioned at one side of the frame area, which is far away from the display area, and is bent to the back surface of the display panel; The device comprises a substrate, a grid layer, a source drain metal layer, a frame area, a binding area, a switching area, a first signal line and a second signal line, wherein the grid layer and the source drain metal layer are sequentially arranged along the direction far away from the substrate; The display panel further comprises a supporting layer, wherein in orthographic projection to the substrate, the supporting layer is provided with an outer boundary, and a region where the first signal line and the second signal line are electrically connected is located in a region surrounded by the outer boundary of the supporting layer.
2. The display panel of claim 1, wherein the source drain metal layer comprises a first source drain metal layer and a second source drain metal layer, the first source drain metal layer and the second source drain metal layer being disposed in a direction away from the substrate; in the switching area, the first source drain metal layer is provided with a plurality of switching wires, and a plurality of first signal wires, a plurality of switching wires and a plurality of second signal wires are electrically connected in a one-to-one correspondence mode.
3. The display panel of claim 2, wherein in an orthographic projection onto the substrate, the plurality of patch cords are located within an area enclosed by an outer boundary of the support layer.
4. A display panel according to claim 3, characterized in that in the orthographic projection onto the substrate the minimum distance of the patch cord from the outer boundary of the support layer is in the range of 1 μm to 10 μm.
5. The display panel of claim 2, further comprising a light shielding layer on a side of the gate layer adjacent to the substrate, the support layer being on the light shielding layer.
6. The display panel of claim 5, wherein the light shielding layer further comprises a portion located in the display region and a connection portion located in the bezel region, the connection portion being located between the support layer and the portion of the light shielding layer located in the display region, and the connection portion connecting the support layer and the portion of the light shielding layer located in the display region.
7. The display panel according to claim 6, wherein the connection portion is net-shaped.
8. The display panel of claim 5, wherein the first source drain metal layer further comprises a power signal line in the frame region, the support layer being electrically connected to the power signal line.
9. The display panel of claim 5, wherein the first source drain metal layer further comprises a reference voltage line in the frame region, the support layer being electrically connected to the reference voltage line.
10. The display panel of claim 5, wherein the thickness of the support layer is in the range of 0.1 μm to 0.5 μm.
11. The display panel of claim 2, further comprising a third source drain metal layer, wherein the third source drain metal layer is located on a side of the second source drain metal layer away from the substrate, and wherein the support layer is located on the third source drain metal layer.
12. The display panel of claim 11, wherein the support layer is provided with a plurality of vent holes therethrough.
13. The display panel of claim 12, wherein a ratio of an area of the vent hole to an area of the support layer ranges from 1/9~1.
14. The display panel of claim 2, further comprising an inorganic encapsulation layer on a side of the second source drain metal layer remote from the substrate, the support layer being on the inorganic encapsulation layer.
15. The display panel of claim 2, further comprising a touch layer, wherein the touch layer is located on a side of the second source drain metal layer away from the substrate, and wherein the support layer is located on the touch layer.
16. The display panel of claim 2, further comprising a passivation layer and a first planarization layer between the first and second source drain metal layers, the passivation layer and the first planarization layer being disposed in a direction away from the substrate; the patch cord is electrically connected with the second signal line through a second patch hole penetrating through the first planarization layer and the passivation layer; In the orthographic projection of the passivation layer to the substrate, the passivation layer covers the region of the transfer region except for the region where the second transfer hole is located.
17. The display panel of claim 2, further comprising a passivation layer between the first source drain metal layer and the second source drain metal layer; Wherein, in an orthographic projection onto the substrate, the passivation layer does not overlap the transition region.
18. The display panel of claim 17, further comprising a first insulating layer and a first planarization layer, the first insulating layer being between the gate layer and the first source drain metal layer, the first signal line and the patch line being electrically connected through a first via penetrating the first insulating layer; In the orthographic projection of the passivation layer to the substrate, the minimum distance between the passivation layer and the target via hole is 1.5-6 μm, and the target via hole is the via hole closest to the passivation layer.
19. The display panel of claim 2, further comprising a first insulating layer and a first planarizing layer; the patch cord comprises a first section and a second section which are connected along a first direction, wherein the first signal line is electrically connected with the first section through a first patch hole penetrating through the first insulating layer, and the second section is electrically connected with the second signal line through a second patch hole penetrating through the first planarization layer; The first transfer holes and the second transfer holes connected with one transfer line are arranged along the first direction, and the first transfer holes and the second transfer holes Kong Jiaoti connected with different transfer lines are arranged along the second direction, wherein the second direction intersects with the first direction; Wherein the dimension of the first segment in the second direction is smaller than the dimension of the second segment in the second direction.
20. The display panel according to claim 1, wherein the thickness of the supporting layer ranges from 0.1 μm to 3 μm.

Description

Display panel and display device Technical Field The disclosure relates to the field of display technologies, and in particular, to a display panel and a display device. Background Organic LIGHT EMITTING Diode (OLED) has been widely used in the display field because of its advantages of self-luminescence, low driving voltage, high luminous efficiency, fast response speed, flexible display, and the like. In order to realize higher screen ratio of the OLED display panel, a flexible liner bending (Pad Bending, PB) technology is developed, namely, a binding area is arranged on one side of the display area of the display panel, and after signal lines for providing control signals for the display area are collected to the binding area, the binding area can be reversely folded to the back surface of the display panel based on the characteristic of flexibility of the OLED display panel. But the bending performance of different membrane layers is different, in order to improve the bending performance of the binding area, the switching of the signal wire is required to be designed to realize the layer switching of the signal wire, and the difference of the switching structure setting of the signal wire has important influence on the extrusion resistance performance of the switching structure of the signal wire. Disclosure of Invention An object of an embodiment of the present disclosure is to provide a display panel and a display device for improving anti-extrusion performance of a switching structure of a signal line of a switching region. In order to achieve the above object, the embodiments of the present disclosure provide the following technical solutions: In one aspect, a display panel is provided, the display panel comprises a display area, a frame area, a binding area, a substrate, a grid layer and a source drain metal layer, wherein the frame area is located on at least one side of the display area, the binding area is located on one side, away from the display area, of the frame area and bent to the back face of the display panel, a transfer area is arranged on the portion, close to the binding area, of the frame area, the grid layer and the source drain metal layer are sequentially arranged along the direction away from the substrate, the grid layer comprises a plurality of first signal lines, the source drain metal layer comprises a plurality of second signal lines in the binding area, the plurality of first signal lines and the plurality of second signal lines are in one-to-one correspondence electrical connection in the transfer area, the support layer is located in the transfer area, in the orthographic projection to the substrate, the support layer is provided with an outer boundary, and the area where the first signal lines and the second signal lines are in electrical connection is located in the area outside the boundary of the support layer. In the display panel, the extrusion deformation resistance of the transfer area can be improved through the arrangement of the supporting layer. In some embodiments, the source-drain metal layer comprises a first source-drain metal layer and a second source-drain metal layer, the first source-drain metal layer and the second source-drain metal layer are arranged along the direction away from the substrate, the plurality of second signal lines are located on the second source-drain metal layer, a plurality of switching lines are arranged on the first source-drain metal layer in the switching area, and the plurality of first signal lines, the plurality of switching lines and the plurality of second signal lines are in one-to-one corresponding electrical connection. In some embodiments, in an orthographic projection onto the substrate, the plurality of patch cords are located within an area enclosed by an outer boundary of the support layer. In some embodiments, in orthographic projection onto the substrate, the minimum spacing of the patch cord from the outer boundary of the support layer is in the range of 1 μm to 10 μm. In some embodiments, the display panel further includes a light shielding layer on a side of the gate layer adjacent to the substrate, and the support layer is on the light shielding layer. In some embodiments, the light shielding layer further includes a portion located in the display region and a connection portion located in the bezel region, the connection portion being located between the support layer and the portion of the light shielding layer located in the display region, and the connection portion connecting the support layer and the portion of the light shielding layer located in the display region. In some embodiments, the connection is mesh-shaped. In some embodiments, in the frame region, the first source drain metal layer further comprises a power signal line, and the support layer is electrically connected with the power signal line. In some embodiments, in the frame region, the first source drain metal layer further includes a