CN215342611U

CN215342611U - Narrow-frame display panel and electronic device

Info

Publication number: CN215342611U
Application number: CN202121040744.8U
Authority: CN
Inventors: 李文辉
Original assignee: Shenzhen Royole Technologies Co Ltd
Current assignee: Shenzhen Royole Technologies Co Ltd
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2021-12-28
Anticipated expiration: 2031-05-14

Abstract

The utility model provides a narrow-frame display panel which comprises a substrate, a display layer arranged on the substrate, an encapsulation layer covering the display layer and a flexible circuit board. The substrate is electrically connected with the flexible circuit board through the lead assembly. The lead assembly comprises a first lead portion arranged on the substrate and electrically connected to the substrate, and a second lead portion arranged on the packaging layer and electrically connected to the flexible circuit board. The first lead portion is electrically connected to the second lead portion. Compared with the prior art, the narrow-frame display panel provided by the utility model has the advantages that the flexible circuit board is electrically connected with the second lead parts electrically connected with the first lead parts so as to realize the design that the flexible circuit board is bound on the substrate, the frame width is greatly reduced, and the design can be applied to narrow-frame display panels with various sizes. In addition, the utility model also provides an electronic device comprising the narrow-frame display panel.

Description

Narrow-frame display panel and electronic device

Technical Field

The utility model belongs to the technical field of display, and particularly relates to a narrow-frame display panel and an electronic device.

Background

Along with the popularization degree of the full screen is higher and higher, the user not only has higher and higher requirements on the function and the performance of the full screen, but also has higher requirements on the appearance of the full screen, for example, the full screen with a narrower frame can have a larger effective display area, and further provides better visual experience for the user.

At present, many manufacturers design full-face screens by adopting a scheme that a flexible printed circuit board is bound on a substrate. Specifically, referring to fig. 1, the prior art discloses a display panel 100 a. The display panel 100a includes a substrate 10a, a display layer 20a provided on the substrate 10a, a protective layer 30a covering the display layer 20a, and a flexible printed circuit board 40 a. The substrate 10a is provided with a bonding region 11a at the outer side of the protective layer 30 a. The flexible printed circuit board 40a is electrically connected to the bonding region 11a so that the flexible printed circuit board 40a is bonded to the substrate 10a, and then the flexible printed circuit board 40a is bent to reduce the size of the display panel 100 a. However, due to the process technology, the width of the bonding region 11a is often too long, so that the bezel width a0 (i.e. the distance from the end of the display layer 20a near the bonding region 11a to the end of the substrate 10a near the bonding region 11 a) of the display panel 100a is too long and unsatisfactory.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the present invention is to provide a narrow-bezel display panel, aiming at the defects of the prior art. On the basis of the prior art, the narrow-frame display panel not only reduces the frame width compared with the display panel in the prior art, but also can be applied to narrow-frame display panels with various sizes.

In order to solve the above technical problem, the present invention provides a narrow-bezel display panel, which includes a substrate, a display layer disposed on the substrate, an encapsulation layer covering the display layer, and a flexible circuit board. The substrate is electrically connected with the flexible circuit board through the lead assembly. The lead assembly comprises a first lead portion arranged on the substrate and electrically connected to the substrate, and a second lead portion arranged on the packaging layer and electrically connected to the flexible circuit board. The first lead portion is electrically connected to the second lead portion. In addition, the utility model also provides an electronic device comprising the narrow-frame display panel.

Compared with the prior art, the narrow-frame display panel provided by the utility model has the advantages that the flexible circuit board is electrically connected with the second lead parts electrically connected with the first lead parts so as to realize the design that the flexible circuit board is bound on the substrate, the frame width is greatly reduced, and the design can be applied to narrow-frame display panels with various sizes.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a flexible circuit board of a display panel provided in the prior art in an unbent state.

Fig. 2 is a schematic structural diagram of a flexible circuit board of a narrow-bezel display panel according to a first embodiment of the present invention in an unbent state.

Fig. 3 is an enlarged view of the portion III in fig. 2.

Fig. 4 is a schematic structural diagram of a flexible circuit board of a narrow-bezel display panel according to a first embodiment of the present invention in a bent state.

Fig. 5 is a schematic structural diagram of a narrow bezel display panel according to a second embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.

Furthermore, the following description of the various embodiments refers to the accompanying drawings, which illustrate specific embodiments in which the utility model may be practiced. Directional phrases used in this disclosure, such as, for example, "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "side," and the like, refer only to the orientation of the appended drawings and are, therefore, used herein for better and clearer illustration and understanding of the utility model, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.

Orientation definition: the term "connection of component A to component B" means that component A is directly connected in contact with component B or component A is indirectly connected to component B through another component.

First embodiment

Referring to fig. 2 to 3 together, a first embodiment of the utility model provides a narrow-bezel display panel 100 and an electronic device (not shown) including the narrow-bezel display panel 100. The electronic device including the narrow-bezel display panel 100 can not only reduce the size of the whole device, but also increase the effective display area, compared with the existing electronic device, thereby providing better visual experience for the user. In the present invention, the electronic device may be an electronic device with a display effect and/or a touch effect, such as a mobile phone, a tablet computer, a notebook computer, and the like, which is not particularly limited. It should be noted that the electronic device may include only one narrow-bezel display panel 100, or may include a plurality of narrow-bezel display panels 100 with the same size, or with different sizes.

Referring to fig. 2 to 3, the narrow-bezel display panel 100 includes a substrate 10, a display layer 20 disposed on the substrate 10, an encapsulation layer 30 covering the display layer 20, and a flexible circuit board 40. The substrate 10 and the flexible circuit board 40 are electrically connected by a lead assembly 50. The lead assembly 50 includes a first lead portion 51 disposed on the substrate 10 and electrically connected to the substrate 10, and a second lead portion 52 disposed on the package layer 30 and electrically connected to the flexible circuit board 40. The first lead portion 51 is electrically connected to the second lead portion 52. It should be noted that, in the present invention, the "first direction" refers to a direction parallel to the thickness direction of the substrate 10, and the "second direction" refers to a direction perpendicular to the first direction, and the first and second directions are only for convenience of description and are not to be construed as limiting the present invention. In the present embodiment, the light emitting direction of the display layer 20 is away from the substrate 10, that is, the narrow-bezel display panel 100 is in a top-emission mode, and the following description is made on the basis of this.

Obviously, compared to the design of the display panel 100a in the prior art in which the flexible printed circuit board 40a is directly electrically connected to the bonding region 11a disposed on the substrate 10a to electrically connect the flexible printed circuit board 40a to the substrate 10a, the flexible circuit board 40 of the narrow-bezel display panel 100 provided in this embodiment is electrically connected to the second lead portion 52 electrically connected to the first lead portion 51 to electrically connect the flexible circuit board 40 to the substrate 10, so that the bezel width a1 (i.e., the distance between the end of the display layer 20 close to the first lead portion 51 and the end of the substrate 10 close to the first lead portion 51 in the second direction) of the narrow-bezel display panel 100 is greatly reduced and is greater than the bezel width a0 of the display panel 100 a. Compared with the display panel 100a, the narrow-bezel display panel 100 with a narrower bezel can provide a better visual experience for the user. In addition, the narrow bezel display panel 100 provided in this embodiment is electrically connected to the second lead portions 52 electrically connected to the first lead portions 51 through the flexible circuit board 40, so as to reduce the bezel width a1, and the design is not limited by the size of the narrow bezel display panel 100, and can be applied to the narrow bezel display panels 100 of various sizes, and the adaptability is strong.

In the present embodiment, the projections of the first lead portion 51 and the second lead portion 52 on the substrate 10 along the first direction are both located outside the projection of the display layer 20 on the substrate 10 along the first direction. Therefore, the first lead portion 51 and the second lead portion 52 can be prevented from interfering with the display effect of the display layer 20, and the display performance of the narrow-bezel display panel 100 can be prevented from being affected. Furthermore, the projections of the first lead portion 51 and the second lead portion 52 on the substrate 10 along the first direction are both located on the same side of the projection of the display layer 20 on the substrate 10 along the first direction, which is convenient for the second lead portion 52 to be electrically connected to the first lead portion 51, thereby avoiding unnecessary dimensional waste of the narrow-bezel display panel 100 due to the position relationship between the first lead portion 51 and the second lead portion 52, and being beneficial to reducing the processing cost.

It should be noted that the encapsulation layer 30 plays a role in blocking water and oxygen, and can prevent the corrosion of the external water vapor to the devices in the display layer 20, thereby affecting the display effect of the narrow-bezel display panel 100. In the present embodiment, the encapsulation layer 30 is transparent, so that the light emitted from the display layer 20 can pass through the encapsulation layer 30 to form a display screen. Alternatively, the Encapsulation layer 30 is made by a Thin Film Encapsulation (TFE) process. In other embodiments, the encapsulation layer 30 may be formed by other processes, provided that the encapsulation layer 30 can perform the functions of blocking water and oxygen.

Alternatively, the substrate 10 may be rigid, so that the narrow bezel display panel 100 may be a fixed-shape display panel; the substrate 10 may also be flexible, bendable, such that the narrow bezel display panel 100 may be a flexible, bendable display panel. Alternatively, the substrate 10 may be made of a material including, but not limited to, glass, Polyimide (PI), Polyethylene Terephthalate (PET), or Polyurethane (PU). Alternatively, the substrate 10 may be transparent, translucent or opaque. In the embodiment, the substrate 10 is opaque, so that light emitted from the display layer 20 cannot pass through the substrate 10, and the display effect of the narrow-bezel display panel 100 is not affected.

Referring to fig. 3 and 4, the lead assembly 50 further includes a connecting portion 53, the first lead portion 51 is disposed on a surface of the substrate 10 facing the package layer 30 (i.e., the first lead portion 51 and the display layer 20 are disposed on the same surface of the substrate 10), the second lead portion 52 is disposed on a surface of the package layer 30 away from the substrate 10, and the connecting portion 53 is connected to the first lead portion 51 and the second lead portion 52. In this way, the first lead portion 51 electrically connected to the substrate 10 may be electrically connected to the second lead portion 52 through the connecting portion 53 such that the second lead portion 52 is electrically connected to the substrate 10, and thus the flexible circuit board 40 electrically connected to the second lead portion 52 may be electrically connected to the substrate 10, i.e., the flexible circuit board 40 is electrically connected to the substrate 10 through the lead assembly 50. Alternatively, the second lead portion 52 may be formed by routing on the surface of the package layer 30 away from the substrate 10 by a highly precise processing method, such as but not limited to a photolithography process, which results in a high yield and improves the production efficiency.

In the present embodiment, the connection portion 53 is a via hole provided in the package layer 30, and two ends of the via hole extend to the first lead portion 51 and the second lead portion 52, respectively. Thus, the first lead portion 51 and the second lead portion 52 are electrically connected to each other through the connecting portion 53 (i.e., via hole). Alternatively, the first lead portion 51 and the second lead portion 53 may be electrically connected by directly performing thermocompression bonding on the connection portion 53, or may be electrically connected by injecting a conductive paste into the connection portion 53, or by performing a conductive treatment on a via hole and then plating copper.

Preferably, the projections of the first lead portion 51 and the second lead portion 52 on the substrate 10 along the first direction have an overlapping region, and the projection of the connection portion 53 on the substrate 10 along the first direction at least partially overlaps the overlapping region. In this way, compared to the first lead part 51 and the second lead part 52 having no overlapping area in the projection on the substrate 10 along the first direction, the first lead part 51 and the second lead part 52 having an overlapping area in the projection on the substrate 10 along the first direction avoid an unnecessary space between the first lead part 51 and the display layer 20 in the second direction, and further reduce the bezel width a1, so that the narrow bezel display panel 100 can provide a better visual experience for a user. In the present embodiment, the projections of the connection portions 53 on the substrate 10 in the first direction all overlap the overlap region. In other embodiments, the projection of the connection portion 53 on the substrate 10 along the first direction may overlap the overlapping region.

Further, in the present embodiment, two ends of the connecting portion 53 are connected to the first lead portion 51 and the second lead portion 52 respectively along the first direction, that is, the axis of the connecting portion 53 is parallel to the first direction. In this way, the connection portion 53 connected to the first lead portion 51 and the second lead portion 52 in the first direction facilitates processing and improves production efficiency. In another embodiment, both ends of the connecting portion 53 may not be connected to the first lead portion 51 and the second lead portion 52 in the first direction, i.e., an angle may be formed between the axis of the connecting portion 53 and the first direction.

Alternatively, part or all of the first lead portion 51 is covered with the encapsulation layer 30. Preferably, the entirety of the first lead portion 51 is covered by the encapsulation layer 30. Thus, compared with the first lead part 51 partially covered by the package layer 30, when the width of the first lead part 51 is not changed (i.e. the distance between the end of the first lead part 51 close to the display layer 20 and the end of the first lead part 51 far from the display layer 20 in the second direction), the frame width a1 of the first lead part 51 fully covered by the package layer 30 can be further reduced, and under the protection of the package layer 30, the first lead part 51 can be effectively prevented from being rapidly aged due to the influence of external factors, thereby greatly prolonging the service life of the narrow-frame display panel 100.

In another embodiment, the connection portion 53 may be a lead provided on the package layer 30, and both ends of the lead are electrically connected to the first lead portion 51 and the second lead portion 52, respectively. It is within the scope of the present invention that both ends of the connecting portion 53 (wire) are electrically connected to the first lead portion 51 and the second lead portion 52, respectively, by welding or the like, so that the second lead portion 53 is electrically connected to the first lead portion 51.

The display layer 20 includes a control layer 21 disposed on the substrate 10 and electrically connected to the substrate 10, and a light emitting layer 22 disposed on a surface of the control layer 21 away from the substrate 10, wherein the control layer 21 is used for controlling a display effect of the light emitting layer 22. In the present embodiment, the control layer 21 includes a Thin Film Transistor (TFT) array formed of a plurality of TFTs and capable of receiving a driving control signal. The Light-Emitting layer 22 includes a plurality of Organic Light-Emitting diodes (OLEDs) electrically connected to the thin film transistor array. The thin film transistor array is used for controlling the organic light emitting diode to emit light. Thus, when the driving control signal is transmitted to the thin film transistor array, the thin film transistor array receiving the driving control signal can control the light emission of each organic light emitting diode to control the display effect of the light emitting layer 22, i.e., the display effect of the narrow-bezel display panel 100.

The substrate 10 includes a power routing structure 11 and a data routing structure 12 disposed at two opposite sides of the outside of the display layer 20, the power routing structure 11 is configured to transmit a voltage required for light emission to the display layer 20, and the data routing structure 12 is configured to transmit a driving control signal required for display to the display layer 20; the power trace structure 11 and the data trace structure 12 on one side are disposed between the display layer 20 and the first lead portion 51. The power trace structure 11 and the data trace structure 12 are electrically connected to the substrate 10, so that the power trace structure 11 and the data trace structure 12 are electrically connected to the first lead portion 51 and the display layer 20. Thus, the driving voltage from the flexible circuit board 40 electrically connected to the second lead portion 52 can be transmitted to the display layer 20 through the power trace structure 11 to provide the energy required by the light emission of the display layer 20. The driving control signal electrically connected to the flexible circuit board 40 of the second lead portion 52 can be transmitted to the display layer 20 through the data trace structure 12 to control the display effect of the display layer 20. In other embodiments, the power trace structure 11 and the data trace structure 12 disposed on one side of the substrate 10 outside the display layer 20 may also be disposed on an outer side of the first lead portion 51 away from the display layer 20, i.e., the first lead portion 51 is located between the power trace structure 11 and the data trace structure 12 and the display layer 20.

Referring to fig. 2 to 4, the flexible circuit board 40 includes a bonding end 41 and a free end 42, the bonding end 41 is electrically connected to the second lead portion 52, and the free end 42 can be bent relative to the bonding end 41, so that the free end 42 can be positioned right below the surface of the substrate 10 facing away from the display layer 20. In this way, the width of the narrow-bezel display panel 100 (i.e., the distance between the two opposite ends of the narrow-bezel display panel 100 in the second direction) is advantageously reduced, and the narrow-bezel display panel is convenient to mount and carry. And the flexible circuit board 40 positioned right below the surface of the substrate 10 facing away from the display layer 20 can avoid interfering with the light emission of the display layer 20, thereby ensuring the display effect of the narrow-bezel display panel 100. The phrase "the free end 42 is positioned directly below the surface of the substrate 10 facing away from the display layer 20" means that the substrate 10 is positioned between the free end 42 and the display layer 20 in the first direction, and the projection of the free end 42 in the second direction is located within the substrate 10.

The narrow bezel display panel 100 further includes a driving chip 60 for providing driving control signals to the display layer 20, and the driving chip 60 is disposed on the flexible circuit board 40 and electrically connected to the flexible circuit board 40. When the free end 42 is bent relative to the binding end 41 to a position directly below the surface of the substrate 10 facing away from the display layer 20, the driving chip 60 is positioned directly below the surface of the substrate 10 facing away from the display layer 20. Thus, the driving chip 60 electrically connected to the flexible circuit board 40 can transmit the driving control signal to the display layer 20 through the flexible circuit board 40 electrically connected to the second lead portion 52 to control the display effect of the display layer 20. Moreover, the driving chip 60 positioned right below the surface of the substrate 10 away from the display layer 20 not only can avoid occupying the frame area of the narrow-frame display panel 100, further reducing the frame width a1, but also can avoid interfering with the light emission of the display layer 20, thereby providing better optical effect and display effect for the user.

The narrow bezel display panel 100 further includes a Printed Circuit Board (PCB) 70 electrically connected to the free end 42 of the flexible circuit board 40, wherein the PCB 70 is electrically connected to a main board circuit (not shown) of the electronic device to realize signal transmission between the main board circuit and the narrow bezel display panel 100.

Second embodiment

Referring to fig. 4 and 5, a narrow bezel display panel 100b according to a second embodiment of the present invention is similar to the narrow bezel display panel 100 according to the first embodiment, and the difference therebetween is that: the light emitting direction of the display layer 20b of the narrow bezel display panel 100b of the second embodiment is different from the light emitting direction of the display layer 20 of the narrow bezel display panel 100 of the first embodiment. The light emitting direction of the display layer 20b of the narrow-bezel display panel 100b of the second embodiment is toward the substrate 10b, that is, the narrow-bezel display panel 100b is in the bottom emission mode, and accordingly, the structure of the narrow-bezel display panel 100b of the second embodiment is changed.

Specifically, in the second embodiment, the flexible circuit board 40b includes the bound end 41b and the free end 42b, the bound end 41b is electrically connected to the second lead portion 52b, and the free end 42b is positioned directly above the surface of the package layer 30b facing away from the substrate 10 b. At this time, the free end 42b is not bent with respect to the binding end 41 b. In this way, the free end 42b positioned right above the surface of the encapsulation layer 30b facing away from the substrate 10b can prevent the flexible circuit board 40b from interfering with the light emission of the display layer 20b, and further, the display effect of the narrow-bezel display panel 100b is affected. The phrase "the free end 42b is positioned directly above the surface of the encapsulation layer 30b facing away from the substrate 10 b" means that the encapsulation layer 30b is positioned between the free end 42b and the substrate 10b in the first direction, and the projection of the free end 42b in the second direction is located within the substrate 10 b.

It is understood that the substrate 10b is transparent and the encapsulation layer 30b is opaque. At this time, the light emitted from the display layer 20b can pass through the substrate 10b but cannot pass through the encapsulation layer 30b, i.e., the light emitting direction of the display layer 20b is toward the substrate 10 b.

The foregoing is illustrative of embodiments of the present invention, and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the embodiments of the present invention and are intended to be within the scope of the present invention.

Claims

1. The narrow-frame display panel is characterized by comprising a substrate, a display layer arranged on the substrate, a packaging layer covering the display layer and a flexible circuit board, wherein the substrate is electrically connected with the flexible circuit board through a lead assembly, the lead assembly comprises a first lead part arranged on the substrate and electrically connected to the substrate and a second lead part arranged on the packaging layer and electrically connected to the flexible circuit board, and the first lead part is electrically connected with the second lead part.

2. The narrow bezel display panel of claim 1, wherein the lead assembly further comprises a connecting portion, the first lead portion is disposed on a surface of the substrate facing the package layer, the second lead portion is disposed on a surface of the package layer facing away from the substrate, and the connecting portion is connected to the first lead portion and the second lead portion.

3. The narrow bezel display panel of claim 2, wherein the connection portion is a via hole formed in the package layer, and two ends of the via hole extend to the first lead portion and the second lead portion respectively.

4. The narrow bezel display panel of claim 2, wherein the connection portion is a wire disposed on the package layer, and two ends of the wire are electrically connected to the first lead portion and the second lead portion respectively.

5. The narrow bezel display panel of any one of claims 2 to 4, wherein a projection of the first lead portion and the second lead portion onto the substrate along a first direction has an overlapping region, and a projection of the connection portion onto the substrate along the first direction at least partially overlaps the overlapping region.

6. The narrow bezel display panel of claim 2, wherein part or all of the first lead portion is covered by the encapsulation layer.

7. The narrow bezel display panel of claim 1, wherein a projection of the first and second lead portions onto the substrate along a first direction are both outside a projection of the display layer onto the substrate along the first direction.

8. The narrow bezel display panel of claim 1, wherein the flexible circuit board comprises a bound end and a free end, the bound end is electrically connected to the second lead portion, and the free end is bent with respect to the bound end such that the free end is positioned directly below a surface of the substrate facing away from the display layer.

9. The narrow bezel display panel of claim 1, wherein the flexible circuit board comprises a bound end and a free end, the bound end is electrically connected to the second lead portion, and the free end is positioned directly above a surface of the encapsulation layer facing away from the substrate.

10. An electronic device, comprising the narrow-bezel display panel according to any one of claims 1 to 9.