CN209859954U - Packaging sheet and display device - Google Patents

Abstract

The application relates to a packaging sheet and a display device. The packaging sheet comprises a first face and a second face which are arranged in a back-to-back mode, and is provided with a first groove and at least one second groove, the first groove is formed by the first face towards the second face in a concave mode, the second groove is formed by the groove bottom face of the first groove towards the second face in a concave mode, and the second groove is used for placing a drying object. When the packaging sheet is applied to the display device, the second surface of the packaging sheet opposite to the second groove can be buffered through the drying object when being subjected to extrusion force, and further the packaging sheet can not be broken. Meanwhile, the packaging sheet corresponding to the second surface opposite to the region except the second groove has a thicker thickness, so that the packaging sheet corresponding to the second surface opposite to the region except the second groove has stronger strength, and the packaging sheet is not easy to deform and break when the second surface of the packaging sheet opposite to the region except the second groove is subjected to extrusion force.

Description

Packaging sheet and display device

Technical Field

The present application relates to the field of display technologies, and in particular, to a package sheet and a display device.

Background

The display device generally seals the light emitting device through an encapsulating sheet to ensure its normal light emission. The conventional encapsulating sheet is provided with a groove. The groove bottom surface of the groove is used for placing drying objects such as a drying sheet or a drying agent, and therefore the phenomenon that the light-emitting device is abnormal due to the fact that external humid gas enters is prevented.

However, the dried material is not usually provided on the groove bottom surface of the groove because of the limitation of the outer dimension and cost of the dried material such as a drying sheet or a drying agent. This results in that the area of the encapsulating sheet, which is not supported by the desiccant, is easily broken when the display device is pressed by an external force.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a sealing sheet and a display device capable of increasing the pressure resistance.

The packaging sheet comprises a first face and a second face which are arranged in a back-to-back mode, and is provided with a first groove and at least one second groove, wherein the first groove is formed by the first face towards the second face in a concave mode, the second groove is formed by the groove bottom face of the first groove towards the second face in a concave mode, and the second groove is used for containing a dry matter.

The second groove of the packaging sheet is formed by the groove bottom surface of the first groove sinking towards the second surface, and the second groove is used for placing a drying object. Therefore, when the packaging sheet is applied to the display device, the second surface of the packaging sheet opposite to the second groove can be buffered by the drying object when being subjected to extrusion force, and further the packaging sheet can not be broken. Meanwhile, since the second groove is recessed from the groove bottom surface of the first groove toward the second surface, the encapsulating sheet corresponding to the second surface opposite to the region other than the second groove has a thicker thickness. Therefore, the packaging sheet corresponding to the second surface opposite to the region except the second groove has stronger strength, and the packaging sheet is not easy to deform and break when the second surface of the packaging sheet opposite to the region except the second groove is subjected to extrusion force. Therefore, the pressure resistance of the packaging sheet of the display device of the embodiment is effectively improved.

In one embodiment, the number of the second grooves is multiple, and the capacity of the second grooves at the edge of the packaging sheet is larger than that of the second grooves at the center of the packaging sheet.

Since the external moisture enters the sealed space (the space where the first groove and the second groove are located) of the sealed light emitting device layer group formed by the package sheet from the edge, the edge of the sealed space needs to be dried more. The capacity of the second groove arranged at the edge of the packaging piece is larger than that of the second groove arranged at the center of the packaging piece. At the moment, the second groove positioned at the edge can be used for placing more drying objects relative to the second groove positioned at the center, so that the drying capacity of the edge of the display device can be effectively improved.

In one embodiment, the second grooves at the edges have a greater groove depth than the second grooves at the center.

The groove depth of the second groove located at the edge is larger than that of the second groove located at the center, and then the capacity is controlled through the groove depth.

In one embodiment, the area of the second groove located at the edge is larger than the area of the second groove located at the center in a cross section parallel to the second face.

This application sets up on the cross-section parallel with the second face, and the area that is located the second recess of edge is greater than the area that is located the second recess of center, and then through area control capacity.

A display device comprises a substrate base plate, a light-emitting device layer set, a drying object and the packaging sheet, wherein the light-emitting device layer set is formed on the substrate base plate, the first surface of the packaging sheet is attached to the substrate base plate, the light-emitting device layer set is contained in a first groove, and the drying object is placed in a second groove.

The application discloses display device has placed the dry thing in the second recess for when receiving the extrusion force with the second face that the second recess is relative, can cushion through the dry thing, and then can not break. Meanwhile, since the second groove is recessed from the groove bottom surface of the first groove toward the second surface, the encapsulating sheet corresponding to the second surface opposite to the region other than the second groove has a thicker thickness. Therefore, the packaging sheet corresponding to the second surface opposite to the area except the second groove has stronger strength, and the packaging sheet is not easy to deform and break when the second surface opposite to the area except the second groove is subjected to extrusion force. Therefore, the pressure resistance of the packaging sheet of the display device of the embodiment is effectively improved.

In one embodiment, the second groove has the same shape as the dried object in a cross section parallel to the second face, and has a length greater than the dried object by 0.1mm to 0.5mm in a plane perpendicular to the second face.

At this time, on the one hand, the dried substance is conveniently put into the second groove by means of bonding and the like. On the other hand, the placing space of the second groove is effectively utilized to place corresponding drying objects, and the space waste of the placing space of the second groove is effectively prevented. That is, the embodiment facilitates the placement of the drying object, and the packaging sheet can have a thicker thickness in more areas, thereby having stronger strength.

In one embodiment, when the number of the second grooves is multiple, the drying performance of the drying object placed in the second groove at the edge is stronger than that of the drying object placed in the second groove at the center.

This application puts into the drier that has different drying performance through the second recess in different positions, and then also can control display device edge effectively and have stronger drying capacity as required.

In one embodiment, the height of the drying object is greater than the groove depth of the second groove.

The height of the drying object is larger than the depth of the second groove, so that the drying object has larger surface area for drying, and the drying performance is improved.

In one embodiment, the drying object is arranged at intervals from the light emitting device layer group.

At this moment, the drying object has a large surface area for drying, and meanwhile, the drying object cannot be in contact with the light-emitting device layer set, and further the light-emitting devices in the light-emitting device layer set cannot be scratched.

In one embodiment, the drying object is a drying agent or a drying sheet.

Drawings

FIG. 1 is a schematic diagram of a display device according to an embodiment;

FIG. 2 is a schematic diagram of a display device according to another embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The display device provided by the application can be but is not limited to an organic light emitting display device, and particularly can be a passive matrix organic light emitting display device.

In one embodiment, referring to fig. 1, a display apparatus is provided, which includes a substrate base plate 100, a light emitting device layer group 200, a dry matter 300, and an encapsulation sheet 400.

The base substrate 100 may be a rigid substrate such as a glass substrate or may be a flexible substrate made of an organic thin film material.

The light emitting device layer group 200 is formed on the substrate base plate 100. When the display device is a passive matrix organic light emitting display device, the light emitting device layer group 200 may include an anode layer, an organic light emitting layer, and a cathode layer. The organic light emitting layer is positioned between the anode layer and the cathode layer. The anode layer may include a plurality of anodes parallel to each other, and the cathode layer may include a plurality of cathodes parallel to each other. The plurality of anodes are arranged to cross the plurality of cathodes. The anode and the cathode at the intersection and the organic light emitting layer therebetween form a plurality of light emitting devices of different colors, such as a red light emitting device, a green light emitting device, a blue light emitting device, and the like.

Of course, the display device of the present application is not limited to the passive matrix organic light emitting display device. For example, the display device may also be an active matrix organic light emitting display device. At this time, the light emitting device layer group 200 further includes various formation layers of the thin film transistor layer (e.g., including a gate metal layer, a gate oxide layer, a semiconductor active layer, source/drain metal layers, etc.). Alternatively, the display device may be another type of display device, and the present application is not limited thereto.

The drying object 300 may be a drying agent or a drying sheet. The desiccant may be dispersed in the glue and adhered to the package sheet 400 together with the glue when used. The drying sheet may be attached with an adhesive tape, and is adhered to the packaging sheet 400 by the adhesive tape in use.

The packaging sheet 400 includes a first side 410 and a second side 420 that are disposed opposite each other. The first face 410 is recessed toward the second face 420 to form a first groove 400 a. The light emitting device layer group 200 is received in the first groove 400 a. The "first face 410" herein refers to two surfaces of the encapsulating sheet 400 opposite to the second face on both sides of the first groove 400 a.

In addition, the first surface 410 of the package sheet 400 is attached to the substrate 100, and may be specifically adhered to the substrate 100 by an adhesive, so that the light emitting device layer group 200 is protected by the package sheet 400 in a sealed manner, and thus, normal light emission may be achieved.

The groove bottom 430 of the first groove 400a continues to recess toward the second face 420 forming at least one second groove 400 b. The drying object 300 is placed in the second groove 400b, thereby preventing external moisture from entering the sealed space where the light emitting device layer group 200 is located to cause abnormality of the light emitting device.

In the display device of the embodiment, the drying object 300 is placed in the second groove 400b, so that when the second surface 420 opposite to the second groove 400b is pressed, the drying object 300 can buffer the pressing object, and the pressing object does not break. Meanwhile, since the second groove 400b is recessed from the groove bottom surface 430 of the first groove 400a toward the second face 420, the encapsulating sheet 400 corresponding to the second face 420 opposite to the region other than the second groove 400b has a thicker thickness. Therefore, the sealing sheet 400 corresponding to the second surface 420 opposite to the region other than the second groove 400b has a strong strength, and thus the sealing sheet 400 is not easily deformed and broken when the second surface 420 opposite to the region other than the second groove 400b is subjected to a pressing force. Therefore, the pressure resistance of the encapsulating sheet 400 of the display device of the present embodiment is effectively improved.

In the embodiment of the present application, the number of the second grooves 400b may be one, or may be more than one. Specifically, the number of the second grooves 400b may be set according to the size of the display device. For example, when the size of the display device is small, only one second recess 400b for accommodating the drying object may be provided. As the size of the display device increases, the number of the second grooves 400b may also increase to a plurality. Of course, a smaller-sized display device may be provided with a plurality of second grooves 400b, which is not limited in the present application.

In one embodiment, referring to fig. 2, the number of the second grooves 400b is plural. The plurality of second grooves 400b may be arranged in a specific manner according to a specific product, and may be arranged in rows and columns, or rows and columns, for example.

Since external moisture enters the inside of the sealing space (the space where the first groove 400a and the second groove 400b are located) for sealing the light emitting device layer group 200 formed by the encapsulation sheet 400 from the edge, the edge of the sealing space is more required to be dried.

In the present embodiment, the capacity of providing the second groove 400b at the edge of the encapsulating sheet 400 is greater than the capacity of providing the second groove 400b at the center of the encapsulating sheet 400. At this time, the second grooves 400b located at the edge may place a larger amount of the drying object 300 than the second grooves 400b located at the center, and thus the edge drying capability of the display device may be effectively improved.

Meanwhile, the capacity of the second grooves 400b arranged at the edges is larger than that of the second grooves 400b arranged at the center, that is, the second grooves 400b are designed to have different sizes according to different positions, so that the layout of the second grooves 400b is rationalized. Moreover, the second groove 400b at the central portion has a smaller capacity, that is, the second groove 400b at the central portion occupies a smaller space, so that the strength of the encapsulating sheet 400 at the central portion is relatively higher, and the encapsulating sheet 400 can be better prevented from being broken.

Specifically, the groove depth of the second groove 400b located at the edge may be set to be greater than that of the second groove 400b located at the center, thereby controlling the capacity by the groove depth. Alternatively, the second grooves 400b may be formed in a cross section parallel to the second surface 420, and the area of the second groove 400b located at the edge may be larger than that of the second groove 400b located at the center, thereby controlling the capacity by the area.

Alternatively, the capacity can be controlled by both the groove depth and the area. That is, the groove depth of the second groove 400b located at the edge may be set to be greater than that of the second groove 400b located at the center, while the area of the second groove 400b located at the edge may be set to be greater than that of the second groove 400b located at the center in a section parallel to the second face 420.

Alternatively, when the capacity of the second groove 400b located at the edge is larger than the capacity of the second groove 400b located at the center, the groove depth of the second groove 400b located at the edge may be set larger than the groove depth of the second groove 400b located at the center, but the area of the second groove 400b located at the edge may be smaller than the area of the second groove 400b located at the center in a cross section parallel to the second surface 420. Alternatively, the groove depth of the second grooves 400b located at the edges is smaller than that of the second grooves 400b located at the center, but the area of the second grooves 400b located at the edges is larger than that of the second grooves 400b located at the center in a section parallel to the second face 420.

Of course, in combination with other situations of actual processes, the embodiments of the present application may also provide that the capacity of the second groove 400b located at the edge is smaller than or equal to the capacity of the second groove 400b located at the center.

The above embodiment can make the edge of the display device have a stronger drying capability according to the need by the capacity control of the second groove 400 b. Of course, the control of the drying performance at various positions of the display device according to the embodiment of the present application may be realized by other methods.

For example, in another embodiment, the drying performance of the drying object 300 disposed in the second grooves 400b of the edge is stronger than that of the drying object 300 disposed in the second grooves 400b of the center. At this time, by placing the drying objects 300 with different drying performances into the second grooves 400b at different positions, the edges of the display device can be effectively controlled to have stronger drying capability according to the requirements.

In one embodiment, the shape of the second groove 400b is the same as that of the drying object 300 in a section parallel to the second face. For example, when the sectional shape of the dried material 300 is rectangular, the sectional shape of the second groove 400b is also rectangular, and when the sectional shape of the dried material 300 is circular, the sectional shape of the second groove 400b is also circular.

Meanwhile, in the present embodiment, the length of the second groove 400b is 0.1mm to 0.5mm greater than the length of the dried object 300 on a plane perpendicular to the second face. Therefore, the embodiment can facilitate placing the drying object 300 into the second groove 400b by bonding or the like, and effectively utilize the placing space of the second groove 400b to place the corresponding drying object 300, thereby effectively preventing the space waste of the placing space of the second groove 400 b. That is, the present embodiment facilitates the insertion of the drying object 300, and the encapsulating sheet 400 may have a thicker thickness in more regions, thereby having a stronger strength.

In the embodiment of the present application, it is also possible to arrange the drying object 300 on a section parallel to the second surface, and the ratio of the sectional area of the drying object 300 to the circumference of the second groove 400b is equal to or greater than 40%, that is, the drying ratio is equal to or greater than 40%, so that the drying object 300 has a good drying effect.

In one embodiment, referring to fig. 1 and 2, the height of the drying object 300 is greater than the groove depth of the second groove 400 b. That is, the drying object 300 extends from the notch of the second groove 400b, and thus may have a larger surface area for drying, thereby improving drying performance. Of course, the present application is not limited thereto, and the height of the drying object 300 may be less than or equal to the groove depth of the second groove 400 b.

In one embodiment, with continued reference to fig. 1 and 2, when the height of the dry substance 300 is greater than the groove depth of the second groove 400b, the dry substance 300 is disposed to be spaced apart from the light emitting device layer group 200. At this time, the dried material 300 has a large surface area for drying, and does not contact the light emitting device layer group 200, thereby not scratching the light emitting devices in the light emitting device layer group 200.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. The packaging sheet is characterized by comprising a first surface and a second surface which are arranged in a reverse manner, and a first groove and at least one second groove are formed, wherein the first groove is formed by the first surface sinking towards the second surface, the second groove is formed by the groove bottom surface of the first groove sinking towards the second surface, and the second groove is used for placing a dry object.

2. The encapsulating sheet according to claim 1, wherein the number of the second grooves is plural, and a capacity of the second groove at an edge of the encapsulating sheet is larger than a capacity of the second groove at a center of the encapsulating sheet.

3. Package chip according to claim 2, characterized in that the second recess at the edge has a greater groove depth than the second recess at the center.

4. Package sheet according to claim 2, characterized in that the area of the second recess at the edge is larger than the area of the second recess at the center in a section parallel to the second face.

5. A display device, comprising a substrate, a light emitting device layer set, a dry substance, and the package sheet of any one of claims 1 to 4, wherein the light emitting device layer set is formed on the substrate, a first surface of the package sheet is attached to the substrate, the light emitting device layer set is accommodated in the first groove, and the dry substance is disposed in the second groove.

6. The display device according to claim 5, wherein the second groove has the same shape as the dried object in a cross section parallel to the second surface, and wherein a length of the second groove is 0.1mm to 0.5mm larger than a length of the dried object in a plane perpendicular to the second surface.

7. The display device according to claim 5, wherein when the number of the second grooves is plural, the drying performance of the drying object placed in the second groove at the edge is stronger than that of the drying object placed in the second groove at the center.

8. The display device according to claim 5, wherein a height of the drying object is larger than a groove depth of the second groove.

9. The display device according to claim 8, wherein the desiccant is provided at a distance from the light-emitting device layer group.

10. The display device according to claim 5, wherein the drying object is a drying agent or a drying sheet.