Display panel and display device

Abstract

The application provides a display panel and a display device. The display panel comprises a substrate and a binding assembly. The substrate comprises a main body part and a bending part connected with the main body part. Two ends of the binding assembly are electrically connected with the main body part and the bending part respectively. The bending part and one end of the binding assembly away from the main body part are bent to the back of the main body part. By connecting part of signal traces in the main body part of the substrate with the bending part through the binding assembly, the number of traces that need to be electrically connected with the bending part is reduced, and the size of the frame area of the display panel is reduced, and the narrow frame effect is improved.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a display panel and display device. Background Technology

[0002] Organic light-emitting diodes (OLEDs) and flat panel displays based on light-emitting diodes (LEDs) are widely used in various consumer electronics products such as mobile phones, televisions, laptops, and desktop computers due to their advantages such as high image quality, energy saving, thin body, and wide range of applications, becoming the mainstream of display devices.

[0003] However, the manufacturing process performance of current OLED display products still needs to be improved. Summary of the Invention

[0004] The purpose of this invention is to provide a display panel and display device to solve the problem of poor narrow bezel performance in existing display panels.

[0005] To achieve the above objectives, the present invention provides a display panel comprising a substrate and a bonding assembly. The substrate includes a main body portion and a bent portion connected to the main body portion. Both ends of the bonding assembly are electrically connected to the main body portion and the bent portion, respectively. The ends of the bent portion and the bonding assembly away from the main body portion are bent to the back surface of the main body portion.

[0006] Further, the display panel includes a display area, a border area surrounding the display area, and a bent area located on the side of the border area away from the display area. The main body is located in the display area and the border area, at least a portion of the bent portion and at least a portion of the bonding component are located in the bent area, and the ends of the bent portion and the bonding portion away from the main body are located in the display area. The border area includes a connection area and a wiring area. The connection area is located between the display area and the bent area. The wiring area is located on the side of the connection area away from the bent area. The main body includes multiple first wirings and multiple second wirings. The first wirings extend from the wiring area to the connection area and are electrically connected to the bent portion. The second wirings extend from the wiring area to the connection area and are electrically connected to the bonding component.

[0007] Further, in the connection area, the main body includes a first sub-part, a second sub-part, and a third sub-part. The bent portion is connected to the side of the first sub-part away from the display area. The second sub-part is located on one side of the first sub-part. The third sub-part is located on the side of the first sub-part away from the second sub-part. Preferably, at least a portion of the first trace extends from the second sub-part into the first sub-part. And / or, at least a portion of the first trace extends from the third sub-part into the first sub-part. Preferably, the second trace extends from the trace area into the second sub-part, and the bonding component is electrically connected to the second trace located in the second sub-part. Preferably, the bent portion includes multiple bent traces, and the first trace is electrically connected to the corresponding bent trace.

[0008] Further, the first sub-part includes a planar region and a curved region disposed on the planar region near the bending region. The bending portion is connected to the first sub-part located in the curved region. The curvature of the first sub-part located in the curved region is greater than the curvature of the first sub-part located in the planar region. Preferably, the curvature of the first sub-part located in the curved region is greater than the curvature of the second sub-part and the third sub-part.

[0009] Furthermore, the display panel further includes a first support film, which is disposed on the back side of the main body and located in the display area and the bezel area. Preferably, the first support film has at least one opening, and the orthographic projection of the opening on the substrate is at least partially located in the curved area of ​​the main body. Preferably, the first support film extends from the bezel into the bending area, and the orthographic projection of the opening on the substrate is at least partially located on the bending portion.

[0010] Furthermore, the substrate also includes at least one anti-crack groove, which is disposed on the main body and located within the connection area. Preferably, the main body is provided with at least two anti-crack grooves, which are respectively disposed on the second sub-part and the third sub-part. Preferably, the anti-crack grooves are located on the side of the second sub-part and the third sub-part closer to the first sub-part.

[0011] Further, in the arrangement direction of the main body portion and the bending portion, the widths of the second sub-part and the third sub-part are greater than the width of the first sub-part. Preferably, the second sub-part and the third sub-part extend from the connecting area into the bending area. Preferably, in the arrangement direction of the main body portion and the bending portion, the widths of the second sub-part and the third sub-part are less than or equal to the sum of the widths of the connecting area and the bending area.

[0012] Furthermore, the bonding component includes a flexible circuit board. Preferably, the display panel further includes a driver chip disposed on the bent portion.

[0013] Furthermore, the display panel also includes a second support film, a pad, and a protective layer. The second support film is disposed on the surface of the bent portion facing the main body and is located within the display area and the bezel area. The pad is disposed on the side of the second support film opposite to the bent portion. The protective layer is disposed on the side of the bent portion away from the second support film. Preferably, the protective layer extends from the bent area into the bezel area.

[0014] Furthermore, the present invention also provides a display device, the display device including the display panel as described above.

[0015] The advantages of the present invention are: In a display panel and display device of the present invention, by connecting a portion of the signal traces in the substrate body to the bending portion through a bonding component, the number of traces that need to be electrically connected to the bending portion is reduced, thereby reducing the size of the bezel area and improving the effect of narrow bezel. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a top view of the display panel in an embodiment of the present invention;

[0018] Figure 2 This is a bottom view of the display panel in an embodiment of the present invention;

[0019] Figure 3 This is an enlarged schematic diagram of the connection area and bending area of ​​the display panel in an embodiment of the present invention.

[0020] Figure 4 for Figure 1 A schematic diagram of the cross-sectional structure of the central display panel at line AA'.

[0021] Figure 5 This is a top view of the first protective film in an embodiment of the present invention;

[0022] Figure 6 This is a top view of the first protective film in another embodiment of the present invention.

[0023] The components in the diagram are shown below:

[0024] Display panel 1; Display area AA;

[0025] Border area FA; Connecting area FA1;

[0026] Cable routing area FA2; Bending area BA;

[0027] Substrate 10; Main body 11;

[0028] First subsection 111; Planar region PA;

[0029] Curved surface region QA; Second sub-section 112;

[0030] Third sub-section 113; Crack-arresting groove 114;

[0031] First route 115; Second route 116;

[0032] Bending section 12; Bending routing 121;

[0033] Binding component 20; Driver chip 30;

[0034] First support membrane 40; Opening 41;

[0035] Second support membrane 50; pad 60;

[0036] Protective layer 70. Detailed Implementation

[0037] The following description, with reference to the accompanying drawings, illustrates preferred embodiments of the present invention, demonstrating its implementability. These embodiments provide a complete overview of the invention for those skilled in the art, making its technical content clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the scope of protection of the present invention is not limited to the embodiments mentioned herein.

[0038] In the accompanying drawings, components with the same structure are indicated by the same numerical designation, and components with similar structures or functions are indicated by similar numerical designations. The dimensions and thicknesses of each component shown in the drawings are arbitrary, and the present invention does not limit the dimensions and thicknesses of each component. To make the illustrations clearer, the thickness of components is appropriately exaggerated in some places in the drawings.

[0039] Furthermore, the following descriptions of the embodiments of the invention are made with reference to the accompanying illustrations, illustrating specific embodiments in which the invention can be implemented. Directional terms used in this invention, such as "upper," "lower," "front," "rear," "left," "right," "inner," "outer," and "side," are merely directional references to the accompanying drawings. Therefore, the use of directional terms is for better and clearer explanation and understanding of the invention, and does not indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] When a component is described as being "on" another component, the component may be placed directly on the other component; alternatively, there may be an intermediate component on which the component is placed, and the intermediate component is placed on the other component. When a component is described as being "installed to" or "connected to" another component, both can be understood as being directly "installed" or "connected" to, or as being indirectly "installed to" or "connected to" another component via an intermediate component.

[0041] This invention provides a display panel 1, which includes a substrate 10 and a bonding component 20. For example... Figures 1-4 As shown, the display panel 1 includes a main body 11 and a bending portion 12. One end of the binding component 20 is connected to the main body 11, and the other end of the binding component 20 is connected to the bending portion 12. The binding component 20 and the bending portion 12 are bent together to the back of the main body 11, thereby reducing the number of traces that need to be introduced into the bending portion 12. This reduces the width of the bezel area FA of the display panel 1 and improves the narrow bezel effect of the display panel 1.

[0042] The display panel 1 includes a display area AA, a border area FA surrounding the display area AA, and a bending area BA located on the side of the border area FA away from the display area AA. The main body 11 is located within the display area AA and the border area FA. The bending portion 12 and the bonding component 20, at their ends near the main body 11, bend towards the back of the main body 11 within the bending area BA, causing a portion of the bending portion 12 and the bonding component 20 to be located within the bending area BA. The portion of the bending portion 12 and the bonding component 20 away from the main body 11 is fixed to the back of the main body 11, causing a portion of the bending portion 12 and the bonding component 20 to be located within the border area FA and the display area AA. In the display area AA, the main body 11 contains multiple light-emitting devices for displaying images. In the border area FA, the display panel 1 has multiple signal traces arranged for transmitting display signals to the pixel circuits in the display area AA. The main body 11 of the substrate 10 is bent towards the back of the main body 11 within the bending area BA.

[0043] Specifically, the substrate 10 provided in this embodiment of the invention includes an array substrate, a light-emitting layer, and an encapsulation layer stacked sequentially. The array substrate contains multiple thin-film transistors and multiple signal lines. The signal lines are electrically connected to the corresponding thin-film transistors to form multiple pixel circuits. The light-emitting devices in the light-emitting layer are electrically connected to the corresponding pixel circuits and are illuminated under the drive of the pixel circuits, thereby realizing the display of the image. The encapsulation layer is disposed on the side of the light-emitting layer facing away from the array substrate, and is used to encapsulate and protect the display devices in the substrate, preventing water and oxygen intrusion and corrosion. In the array substrate, the pixel circuit located in the display area AA is electrically connected to the signal lines located in the border area FA through corresponding signal lines, and is also electrically connected to the driving chip 30 disposed on the bending portion 12 through the signal lines located in the border area FA, thereby realizing the transmission of display signals and thus realizing the transformation of the displayed image.

[0044] Further, the bezel area FA includes a connection area FA1 and a trace area FA2. The connection area FA1 is located between the display area AA and the bending area BA, and the trace area FA2 is located on the side of the connection area FA1 away from the bending area BA. The signal traces in the substrate 10 extend from the trace area FA2 into the connection area FA1, and the bending portion 12 and the bonding component 20 are electrically connected to the signal traces in the connection area FA1. In the connection area FA1, the main body 11 includes a first sub-part 111, a second sub-part 112, and a third sub-part 113. The side of the first sub-part 111 away from the display area AA is connected to the bending portion 12. In a first direction X perpendicular to the arrangement direction of the main body 11 and the bending portion 12, the second sub-part 112 is located on one side of the first sub-part 111, and the third sub-part 113 is located on the side of the first sub-part 111 away from the second sub-part 112. Optionally, in the second direction Y, which is parallel to the arrangement direction of the main body 11 and the bending portion 12, the width of the first sub-part 111 is equal to the width of the bending portion 12.

[0045] The signal traces in the main body 11 include multiple first traces 115 and multiple second traces 116, both extending from the trace area FA2 to the connection area FA1. Specifically, a portion of the first traces 115 extends from the trace area FA2 to the second sub-section 112, and then from the second sub-section 112 to the first sub-section 111. The remaining portion of the first traces 115 extends from the trace area FA2 to the third sub-section 113, and then from the third sub-section 113 to the first sub-section 111. The bend 12 is electrically connected to the first traces 115 located in the first sub-section 111. The second traces 116 extend from the trace area FA2 to the second sub-section 112, and the bonding component 20 is electrically connected to the second traces 116 located in the second sub-section 112. The bending portion 12 is electrically connected to the first trace 115 in the first sub-part 111, and the binding component 20 is electrically connected to the second trace 116 in the second sub-part 112.

[0046] Furthermore, the display panel 1 includes a driver chip 30, which is bonded to the bending portion 12 and electrically connected to the traces in the bending portion 12. The bending portion 12 is provided with multiple bent traces 121, one end of which is electrically connected to the first trace 115, and the end of which is away from the first trace 115 is electrically connected to the driver chip 30. Optionally, the bonding component 20 can be a flexible circuit board. One end of the flexible circuit board is bonded to the main body 11 of the substrate 10 and electrically connected to the second trace 116 in the second sub-part 112 of the main body 11. The end of the flexible circuit board away from the main body 11 is electrically connected to the end of the bending part 12 away from the main body 11, and is electrically connected to the driver chip 30 bonded to the bending part 12 through the trace in the bending part 12. This reduces the number of signal traces in the first sub-part 111 of the main body, and allows some signal traces to be electrically connected to the bending part 12 in the second sub-part 112 through the bonding component 20. This reduces the width of the connection area FA1 and achieves the effect of a narrow bezel.

[0047] The display panel 1 also includes a first support film 40, a second support film 50, a pad 60, and a protective layer 70. The first support film 40 is attached to the back of the main body 11 and is located in the display area AA and the bezel area FA. The second support film 50 is attached to the surface of the bent portion 12 facing the main body 11 and is also located in the display area AA and the bezel area FA. The pad 60 is located between the first support film 40 and the second support film 50. The protective layer 70 covers the side of the bent portion 12 in the bent area BA away from the second support film 50, and both sides of the protective layer 70 extend from the bent area BA to the bezel area FA. The first support film 40 and the second support film 50 can be BPF (Barrier Protection Film) layers, which can be used to support the substrate 10 in the flat area (i.e., the display area AA and the bezel area FA) and prevent the substrate 10 from being corroded by moisture. The pad 60 is used to support the bending area BA and prevent the bending portion 12 within the bending area BA from breaking due to the small bending radius. The protective layer 70 can be a BPL (Bending Protect Layer) film, which can be coated on the outside of the bending portion 12 through a coating process, thereby protecting the bending portion 12 and preventing the bending trace 121 in the bending portion 12 from breaking.

[0048] like Figure 5As shown, the first support film 40 has a plurality of openings 41. The orthographic projection of the openings 41 onto the substrate 10 is located on the first sub-part 111, and the orthographic projection of the openings 41 onto the substrate 10 is at least partially located in the curved area QA of the main body 11. By providing a plurality of openings 41 on the first support film 40, the flexibility of the first support film 40 in the frame area FA is increased, allowing the first sub-part 111 in the connecting area FA1 to bend near the bending portion 12, thereby further reducing the width of the connecting area FA1. Optionally, the openings 41 are elongated strips arranged along the first direction X and extending along the second direction Y. In other embodiments of the present invention, such as Figure 6 As shown, a plurality of openings 41 may also be provided on the first support film 40 corresponding to the second sub-part 112 and the third sub-part 113, that is, the orthographic projection of the plurality of openings 41 on the main body 11 may be located on the first sub-part 111, the second sub-part 112, and the third sub-part 113. Further, the first support film 40 may extend from the edge to the bending area BA, and the orthographic projection of the openings 41 on the substrate 10 is at least partially located on the bending portion 12.

[0049] Specifically, such as Figure 3 and Figure 4 As shown, the first sub-part 111 includes a planar region PA and a curved region QA located on the side of the planar region PA near the bending region BA. The bending portion 12 is connected to the first sub-part 111 located in the curved region QA. The opening 41 on the first support film 40 allows the first sub-part 111 located in the curved region QA to bend towards the back of the main body 11, thereby making the curvature of the first sub-part 111 located in the curved region QA greater than the curvature of the first sub-part 111 located in the planar region PA. By bending the end of the first sub-part 111 near the bending portion 12 towards the back of the main body 11, the bending stress of the bending portion 12 in the bending region BA can be reduced. The reduction in bending stress also helps to reduce the bending radius of the bending portion 12 in the bending region BA, thereby reducing the size of the bending portion 12, thus reducing the screen ratio of the non-display area (i.e., the bezel area FA and the bending region BA), and further reducing the bezel of the display panel 1.

[0050] The substrate 10 also includes a crack-prevention groove 114, which is provided on the main body 11 and located within the connection area FA1. Figures 1-3As shown, the anti-crack groove 114 extends from the side of the main body 11 toward the bending area BA towards the side of the main body 11 away from the bending area BA, and the anti-crack groove 114 is located on at least one side of the first sub-part 111 in the curved area QA. Specifically, the main body 11 is provided with two anti-crack grooves 114, which are respectively provided on the second sub-part 112 and the third sub-part 113, and are respectively located on the side of the second sub-part 112 and the third sub-part 113 closest to the first sub-part 111. By providing the anti-crack groove 114, the bending of the first sub-part 111 and the bending portion 12 in the curved area QA can prevent the film layer and signal traces in the second sub-part 112 and the third sub-part 113 from breaking. Optionally, the shape of the anti-crack groove 114 can be at least one of U-shape, quadrilateral or arc shape.

[0051] Furthermore, by providing the crack-resistant groove 114, the influence between the first sub-part 111 and the second sub-part 112 and the third sub-part 113 can be reduced, thereby also increasing the width of the second sub-part 112 and the third sub-part 113 in the second direction Y, such as Figure 3 As shown, the second sub-part 112 and the third sub-part 113 extend from the connecting area FA1 into the bending area BA, thereby causing the widths W2 and W3 of the second sub-part 112 and the third sub-part 113 in the second direction Y to be greater than the width W1 of the first sub-part 111 in the second direction Y, and the widths W2 and W3 of the second sub-part 112 and the third sub-part 113 in the second direction Y to be less than or equal to the sum I of the widths of the connecting area FA1 and the bending area BA in the second direction Y. By increasing the width of the second sub-part 112 and the third sub-part 113, the bonding component 20 is facilitated to bond with the second sub-part 112, and the difficulty of arranging signal traces in the second sub-part 112 and the third sub-part 113 is reduced, without affecting the width of the bezel area FA, and without affecting the final narrow bezel effect of the display panel 1. In other embodiments of the present invention, the width W2 of the second sub-part 112 in the second direction Y and the width W3 of the third sub-part 113 in the second direction Y may not be equal. For example, the width of the second sub-part 112 may be further increased according to the number of signal traces in the second sub-part 112 and the third sub-part 113, so that the width W2 of the second sub-part 112 in the second direction Y is greater than the width W3 of the third sub-part 113 in the second direction Y.

[0052] This invention also provides a display device, which can be an OLED (Organic Light-Emitting Diode) display device, including the display panel 1 as described above. The display panel 1 is used to display images on the display device. The display device can be any display device with display function, such as a mobile phone, a laptop, a tablet computer, etc.

[0053] In the display panel and display device provided in the embodiments of the present invention, by pulling out some signal traces in the main body of the substrate and connecting the pulled signal traces to the bending part through a bonding component, the number of traces that need to be electrically connected to the bending part is reduced, thereby reducing the size of the bezel area and improving the narrow bezel effect.

[0054] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A display panel, characterized in that, include: The display panel includes: a display area, a border area surrounding the display area, and a bent area located on the side of the border area away from the display area; A substrate, the substrate including a main body portion and a bent portion connected to the main body portion; A binding component, one end of which is connected to the main body and the other end of which is connected to the bent portion. The main body is located in the display area and the border area, at least a portion of the bent portion and at least a portion of the binding component are located in the bent area, and the ends of the bent portion and the binding component away from the main body are located in the display area, the border area including: The connection area is located between the display area and the bending area; The wiring area is located on the side of the connection area away from the bending area; The main body includes multiple first traces and multiple second traces. The first traces extend from the trace area to the connection area and are electrically connected to the bending portion. The second traces extend from the trace area to the connection area and are electrically connected to the bonding component. The bent portion and the binding component are bent to the back of the main body at the end away from the main body; In the connection area, the main body includes: The first sub-part is connected to the side of the first sub-part away from the display area; The second sub-part is located on one side of the first sub-part; The second trace extends from the trace area into the second sub-section, and the bonding component is electrically connected to the second trace located in the second sub-section.

2. The display panel as described in claim 1, characterized in that, In the connection area, the main body portion further includes: The third sub-part is located on the side of the first sub-part away from the second sub-part.

3. The display panel as described in claim 2, characterized in that, At least a portion of the first trace extends from the second sub-section into the first sub-section; and / or, At least a portion of the first trace extends from the third sub-section into the first sub-section.

4. The display panel as described in claim 2, characterized in that, The bending section includes multiple bending traces, and the first trace is electrically connected to the corresponding bending trace.

5. The display panel as described in claim 2, characterized in that, The first sub-part includes a planar region and a curved region located on the side of the planar region near the bending region; The bent portion is connected to the first sub-portion located in the curved surface region; The curvature of the first sub-part located in the curved surface region is greater than the curvature of the first sub-part located in the planar region.

6. The display panel as described in claim 5, characterized in that, The curvature of the first sub-section located in the curved surface region is greater than the curvature of the second sub-section and the third sub-section.

7. The display panel as described in claim 5, characterized in that, Also includes: A first support film is disposed on the back of the main body and located in the display area and the border area; The first support film has a plurality of openings, and the orthographic projection of the openings on the substrate is at least partially located in the curved area of ​​the main body.

8. The display panel as described in claim 7, characterized in that, The first support film extends from the frame into the bending area, and the orthographic projection of the opening on the substrate is at least partially located on the bending portion.

9. The display panel as described in claim 2, characterized in that, The substrate further includes: At least one crack-prevention groove is provided on the main body and located within the connection area; The main body is provided with at least two crack-prevention grooves, which are respectively provided on the second sub-part and the third sub-part.

10. The display panel as claimed in claim 9, characterized in that, The crack-resistant groove is located on the side of the second sub-section and the third sub-section near the first sub-section.

11. The display panel as claimed in claim 2, characterized in that, In the arrangement direction of the main body and the bent portion, the widths of the second sub-part and the third sub-part are greater than the width of the first sub-part; The second sub-part and the third sub-part extend from the connecting area into the bending area.

12. The display panel as claimed in claim 11, characterized in that, In the arrangement direction of the main body and the bending portion, the width of the second sub-part and the third sub-part is less than or equal to the sum of the widths of the connecting area and the bending area.

13. The display panel as claimed in claim 1, characterized in that, The bonding component includes a flexible circuit board; The display panel also includes a driver chip, which is disposed on the bent portion.

14. The display panel as claimed in claim 1, characterized in that, Also includes: The second support film is disposed on the side surface of the bent portion facing the main body portion, and is located within the display area and the frame area; A pad is provided on the side of the second support membrane opposite to the bent portion; A protective layer is provided on the side of the bent portion away from the second support membrane; The protective layer extends from the bending area to the border area.

15. A display device, characterized in that, Includes the display panel as described in any one of claims 1-14.

Images