Display panel and display device

Abstract

The present invention provides a display panel and a display device, wherein the display panel comprises a panel body, the panel body comprises a display portion and a terminal bending portion, and a water vapor barrier layer is arranged on the side surface of the panel body along the thickness direction, the water vapor barrier layer comprises barrier sub-portions located on both sides of the terminal bending portion, one of the barrier sub-portions comprises a first water vapor barrier portion arranged on the side surface of the display portion close to the terminal bending portion, and a second water vapor barrier portion extending from the first water vapor barrier portion to the side edge of the terminal bending portion, that is, a water vapor barrier layer is arranged on the side surface exposed by cutting to form the terminal bending portion, so as to cut off the path for external water vapor to invade into the interior of the panel body, thereby greatly reducing the risk of internal metal circuit corrosion caused by water vapor invasion and thus causing poor display, and effectively improving the reliability of the display panel.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] The pad bending technology has gradually replaced the chip-on-film bending (COF) technology and become the mainstream bending technology because it can significantly shorten the border width of the display panel.

[0003] Pad Bending technology requires the display substrate to be cut into special shapes, the test area of ​​the display substrate to be removed, and the pad area to be bent to the back of the display substrate to reduce the width of the frame. The test circuit in the test area is connected to the drive signal line in the pad area. After the test area is removed by the special-shaped cutting process, part of the metal signal line in the pad area will inevitably be exposed to the outside environment at the cutting surface. The water vapor in the outside environment invades the inside of the display panel through the exposed metal signal line and causes corrosion, resulting in poor display such as bright lines or black screen. Summary of the invention

[0004] The present invention provides a display panel and a display device, which solve the problem of poor display caused by water vapor invading the interior of the display panel.

[0005] In order to solve the above problems, in a first aspect, the present invention provides a display panel, the display panel comprising:

[0006] The panel body comprises a display portion and a terminal bending portion, wherein the terminal bending portion is connected to one side of the display portion;

[0007] The water vapor barrier layer is arranged on the side of the panel body along the thickness direction, and includes barrier sub-portions located on both sides of the terminal bending portion, and the barrier sub-portions include a first water vapor barrier portion arranged on the side of the display portion close to the terminal bending portion, and a second water vapor barrier portion extending from the first water vapor barrier portion to the side of the terminal bending portion.

[0008] In a display panel provided in an embodiment of the present invention, the terminal bending portion includes:

[0009] A connecting portion connected to one side of the display portion;

[0010] a bending portion connected to a side of the connecting portion away from the display portion and bent in a direction away from the light emitting surface of the display portion;

[0011] a binding portion connected to a side of the bending portion away from the connecting portion and located at a side of the display portion away from the light emitting surface;

[0012] Wherein, the second water vapor barrier portion is arranged on a side surface of the connecting portion.

[0013] In a display panel provided by an embodiment of the present invention, the display portion includes curved corner portions located on both sides of the terminal bending portion and connected to the terminal bending portion, and the first water vapor barrier portion is disposed on the side surfaces of the curved corner portions.

[0014] In a display panel provided by an embodiment of the present invention, a length of the second water vapor barrier along a direction extending from an end connected to the first water vapor barrier toward away from the first water vapor barrier is equal to a length of the connecting portion.

[0015] In a display panel provided by an embodiment of the present invention, a length of the first water vapor barrier portion along a direction extending from an end connected to the second water vapor barrier portion toward a direction away from the second water vapor barrier portion is 4-6 mm.

[0016] In a display panel provided by an embodiment of the present invention, the material of the water vapor barrier layer is a mixture of hydrofluoroether and fluorine-containing acrylate resin or an optical adhesive.

[0017] In a display panel provided by an embodiment of the present invention, the width of the water vapor barrier layer along the thickness direction of the panel body is equal to the thickness of the panel body.

[0018] In a display panel provided in an embodiment of the present invention, the display panel also includes a first barrier extension portion connected to the water vapor barrier layer and arranged on the light emitting surface of the panel body, and / or a second barrier extension portion connected to the water vapor barrier layer and arranged on the side of the panel body facing away from the light emitting surface.

[0019] In a display panel provided by an embodiment of the present invention, the water vapor barrier layer includes two barrier sub-portions symmetrically arranged at two ends of the terminal bending portion.

[0020] In a second aspect, the present invention further provides a display device, comprising the aforementioned display panel.

[0021] Beneficial effect: The present invention provides a display panel and a display device, wherein the display panel comprises a panel body, the panel body comprises a display part and a terminal bending part, and a water vapor barrier layer is arranged on the side of the panel body along the thickness direction, the water vapor barrier layer comprises barrier sub-parts located on both sides of the terminal bending part, one of the barrier sub-parts comprises a first water vapor barrier part arranged on the side of the display part close to the terminal bending part, and a second water vapor barrier part extending from the first water vapor barrier part to the side of the terminal bending part, that is, a water vapor barrier layer is arranged on the side exposed by cutting to form the terminal bending part, so as to cut off the path for external water vapor to invade into the interior of the panel body, thereby greatly reducing the risk of internal metal circuit corrosion caused by water vapor invasion and thus causing poor display, and effectively improving the reliability of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the 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 work.

[0023] Figure 1 is a schematic diagram of a planar structure of a display panel provided by an embodiment of the present invention;

[0024] Figure 2 is a schematic diagram of a planar structure of another display panel provided by an embodiment of the present invention;

[0025] Figure 3 is a schematic diagram of a side view structure of another display panel provided by an embodiment of the present invention;

[0026] Figure 4 is a schematic diagram of a planar structure of another display panel provided by an embodiment of the present invention;

[0027] Figure 5 It is a schematic diagram of the side structure of another display panel provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0030] In this application, the word "exemplary" is used to mean "serving as an example, illustration, or illustration." Any embodiment described in this application as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any person skilled in the art to implement and use the invention. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the invention can be implemented without using these specific details. In other instances, well-known structures and processes are not elaborated in detail to avoid obscuring the description of the invention with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in this application.

[0031] An embodiment of the present invention provides a display panel, Figure 1 The cross-sectional structure of the display panel shown is described in detail:

[0032] The display panel includes a panel body 100 and a water vapor barrier layer 200 disposed on a side surface of the panel body 100 in a thickness direction;

[0033] The panel body 100 includes a display portion 110 and a terminal bending portion 120 connected to one side of the display portion 110. The display portion 110 is provided with a plurality of pixel portions for display. The terminal bending portion 120 is provided with a metal trace connected to a signal line in the display portion 110 and a binding terminal. The length of the terminal bending portion 120 along the direction of the side connected to the display portion 110 is shorter than the length of the display portion 110. Portions on both sides of the terminal bending portion 120 are removed by a cutting process. Figure 1Schematically shows the structure of the terminal bending portion 120 in a plane unfolded state. In the working state of the display panel, the terminal bending portion 120 is usually bent in a direction away from the display surface of the panel body 100 and fixed on the side of the panel body 100 away from the display surface;

[0034] The water vapor barrier layer 200 includes a barrier sub-portion 200a located on both sides of the terminal bending portion 120, and generally includes two barrier sub-portions 200a located opposite to each other on both sides of the terminal bending portion 120, one of the barrier sub-portions 200a includes a first water vapor barrier portion 210 arranged on the side of the display portion 110 close to the terminal bending portion 120, and a second water vapor barrier portion 220 extending from the first water vapor barrier portion 210 to the side of the terminal bending portion 120, and the first water vapor barrier portion 210 is connected to the second water vapor barrier portion 220.

[0035] In the display panel provided in the embodiment of the present invention, a water vapor barrier layer 200 is provided on the side surface of the junction area between the display portion 110 and the terminal bending portion 120, that is, on the side surface exposed by cutting to form the terminal bending portion 120, so as to cut off the path for external water vapor to invade into the interior of the panel body 100, thereby greatly reducing the risk of corrosion of the internal metal circuit due to water vapor invasion and thus causing poor display, and effectively improving the reliability of the display panel.

[0036] Furthermore, in some embodiments, the terminal bending portion 120 is usually centrally arranged on one side of the display portion 110. Therefore, the water vapor barrier layer 200 includes two blocking sub-portions 200a that are relatively arranged at both ends of the terminal bending portion, and the two blocking sub-portions 200a are symmetrically arranged, that is, the two blocking sub-portions 200a have the same shape and size.

[0037] In some embodiments, see Figure 2 Another schematic diagram of the planar structure of the display panel is shown, wherein the terminal bending portion 120 includes a connecting portion 121, a bending portion 122 and a binding portion 123:

[0038] The connecting portion 121 is connected to one side of the display portion 110 and serves as a buffer area between the bending portion 122 and the display portion 110 . The connecting portion 121 and the display portion 110 are coplanar.

[0039] The bent portion 122 is connected to the side of the connecting portion 121 away from the display portion 110 and is bent in a direction away from the light emitting surface of the display portion 110. For the side view structure after bending, please refer to Figure 3 ;

[0040] The binding portion 123 is connected to the side of the bending portion 122 away from the connecting portion 121 and is located on a side of the display portion 110 away from the light emitting surface, and is used to bind the printed circuit board and the driving chip;

[0041] In this embodiment, the applicant further discovered that the second water vapor barrier portion 220 is only provided on the side of the connecting portion 121 to greatly reduce the incidence of metal wiring corrosion caused by water vapor intrusion. When the second water vapor barrier portion 220 is further extended to be provided on the bending portion 122 and the binding portion 123, the incidence of metal wiring corrosion caused by water vapor intrusion will not be further reduced. Instead, the process difficulty of forming the second water vapor barrier portion 220 will increase. Therefore, the second water vapor barrier portion 220 is provided on the side of the connecting portion 121, and further, the length of the second water vapor barrier portion 220 is equal to the length of the connecting portion.

[0042] In some embodiments, please refer to Figure 1 The four corners of the display portion 110 are rounded, and the rounded corners are usually cut together with the terminal bending portion 120, that is, the display portion 110 includes two rounded corners 111 located on both sides of the terminal bending portion 120 and connected to the terminal bending portion 120, and the first water vapor barrier portion 210 is arranged on the side of the rounded corner 111;

[0043] Furthermore, the applicant has found that a length of the first water vapor barrier 210 along a direction extending from one end connected to the second water vapor barrier 220 to away from the second water vapor barrier 220 is 4-6 mm, which can achieve a better effect of preventing water vapor intrusion.

[0044] In some embodiments, the material of the water vapor barrier layer 200 is a mixture of hydrofluoroether and fluorinated acrylate resin, which has excellent water resistance, moisture resistance and anti-stickiness, thereby effectively preventing water vapor from invading the panel body 100 and corroding the metal wiring.

[0045] In some embodiments, the material of the water vapor barrier layer 200 can also be selected from other optical adhesives that are commonly used in the art and can block water vapor. For example, the material of the water vapor barrier layer 200 can be set to be ultraviolet light curing adhesive.

[0046] In some embodiments, refer to 3, the width of the water vapor barrier layer 200 along the thickness direction of the panel body 100 is equal to the thickness of the panel body 100, that is, in the area where the water vapor barrier layer 200 is set, the water vapor barrier layer 200 completely covers the side of the corresponding area of ​​the panel body 100, thereby cutting off the path for external water vapor to invade the interior of the panel body 100 to the greatest extent.

[0047] Furthermore, in some embodiments, another display panel is provided. The planar structure of the display panel is shown in FIG. Figure 4 , please refer to the side view structure Figure 5 The display panel further comprises a first barrier extension portion 231 connected to the water vapor barrier layer 200 and arranged on the light emitting surface of the panel body 100, and / or a second barrier extension portion 232 connected to the water vapor barrier layer 200 and arranged on the side of the panel body 100 away from the light emitting surface. The first barrier extension portion 231 and the second barrier extension portion 232 are usually produced simultaneously with the water vapor barrier layer 200 in one process and made of the same material. On the one hand, the adhesion between the water vapor barrier layer 200 and the panel body can be increased to avoid the water vapor barrier layer 200 from being damaged as the display panel is used for a longer time. The edge of the vapor barrier layer 200 is warped, so that part of the side is exposed, which may lead to the possibility of water vapor intrusion. On the other hand, the water vapor barrier layer 200 is usually formed by a coating process. Due to the limitation of coating accuracy, in order to completely cover the side of the corresponding area of ​​the panel body 100 with the water vapor barrier layer 200, a certain amount of glue overflow is usually formed during the coating process, that is, the first barrier extension part 231 and the second barrier extension part 232 are formed, wherein the extension width of the first barrier extension part 231 and the second barrier extension part 232 is less than or equal to 2 mm, which is specifically set according to the actual process.

[0048] It should be noted that the above-mentioned display panel embodiment only describes the above-mentioned structure. It can be understood that, in addition to the above-mentioned structure, the display panel of the embodiment of the present invention may also include any other necessary structures as needed, such as a cover plate arranged on the light-emitting surface side of the panel body, and a back plate and a heat dissipation material arranged on the side of the panel body away from the light-emitting surface, etc., which are not specifically limited here.

[0049] Another embodiment of the present invention further provides a display device, which includes the display panel provided by the aforementioned embodiment. The display device includes but is not limited to a mobile phone, a smart watch, a tablet computer, a laptop computer, and a television.

[0050] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the detailed description of other embodiments above, and will not be repeated here.

[0051] A display panel and a display device provided by an embodiment of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A display panel, characterized in that: The display panel comprises: The panel body includes a display portion and a terminal bending portion, wherein the terminal bending portion is connected to one side of the display portion, and the terminal bending portion is provided with a metal wiring connected to a signal line in the display portion and a binding terminal; A water vapor barrier layer is arranged on the side of the panel body along the thickness direction, the water vapor barrier layer covers the metal wiring, the water vapor barrier layer includes barrier sub-portions located on both sides of the terminal bending portion, and the barrier sub-portions include a first water vapor barrier portion arranged on the side of the display portion close to the terminal bending portion, and a second water vapor barrier portion extending from the first water vapor barrier portion to the side of the terminal bending portion.

2. The display panel according to claim 1, characterized in that: The terminal bending portion comprises: A connecting portion connected to one side of the display portion; a bending portion connected to a side of the connecting portion away from the display portion and bent in a direction away from the light emitting surface of the display portion; a binding portion connected to a side of the bending portion away from the connecting portion and located at a side of the display portion away from the light emitting surface; Wherein, the second water vapor barrier portion is arranged on a side surface of the connecting portion.

3. The display panel according to claim 1, characterized in that: The display portion includes curved corner portions located at both sides of the terminal bending portion and connected to the terminal bending portion, and the first water vapor barrier portion is arranged on the side surfaces of the curved corner portions.

4. The display panel according to claim 2, characterized in that: The length of the second water vapor barrier portion along a direction extending from one end connected to the first water vapor barrier portion toward away from the first water vapor barrier portion is equal to the length of the connecting portion.

5. The display panel according to claim 3, characterized in that: The length of the first water vapor barrier portion along a direction extending from one end connected to the second water vapor barrier portion toward away from the second water vapor barrier portion is 4-6 mm.

6. The display panel according to claim 1, characterized in that: The material of the water vapor barrier layer is a mixture of hydrofluoroether and fluorine-containing acrylate resin or an optical adhesive.

7. The display panel according to claim 1, characterized in that: The width of the water vapor barrier layer along the thickness direction of the panel body is equal to the thickness of the panel body.

8. The display panel according to claim 7, characterized in that: The display panel also includes a first barrier extension portion connected to the water vapor barrier layer and arranged on the side of the light emitting surface of the panel body, and / or a second barrier extension portion connected to the water vapor barrier layer and arranged on the side of the panel body away from the light emitting surface.

9. The display panel according to claim 1, characterized in that: The water vapor barrier layer includes two barrier sub-parts symmetrically arranged at two ends of the terminal bending part.

10. A display device, characterized in that: The display device comprises the display panel according to any one of claims 1 to 9.

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