WO2020199551A1

WO2020199551A1 - Display packaging structure and manufacturing method therefor

Info

Publication number: WO2020199551A1
Application number: PCT/CN2019/111540
Authority: WO
Inventors: 谭伟; 张亮
Original assignee: 深圳市华星光电半导体显示技术有限公司
Priority date: 2019-04-02
Filing date: 2019-10-16
Publication date: 2020-10-08
Also published as: CN110048018B; CN110048018A

Abstract

A display packaging structure and a manufacturing method therefor. The display packaging structure comprises: a cover body (10) and a display element substrate (20), the cover body (10) being combined with the display element substrate (20), such that an extension portion (11B) of the cover body (10) surrounds a side wall of the display element substrate (20), and a gap is formed between the extension portion (11B) and the side wall; and a sealant (30), filled in the gap. The extension portion (11B) of the cover body (10) surrounds the side wall of the display element substrate (20), so that the distance from an OLED device to an edge of a display panel is reduced without affecting the packaging effect, thereby achieving ultra-narrow bezel design.

Description

Display packaging structure and manufacturing method thereof

Technical field

The present invention relates to a display packaging structure and a manufacturing method thereof, and in particular to a display packaging structure with a narrow frame and a manufacturing method thereof.

Background technique

In recent years, Organic Light Emitting Diode (OLED) has the advantages of self-luminescence, high contrast, fast response time, and flexible display, so it is widely used. The difference between OLED display and traditional liquid crystal display is that OLED display does not require a backlight module. OLED devices inject into organic thin film materials through electron and hole carriers and emit light on the organic material. However, organic materials are very sensitive to water vapor and oxygen, and water/oxygen penetration will greatly reduce the device life. In order to meet the requirements of commercialization for device life and stability, OLED devices have very high requirements for packaging effects. For example, the water vapor transmission rate is less than 10-6 g/m²/day, oxygen transmission rate is less than 10-5 ml/m²/day (under 1 atmospheric pressure). Therefore, packaging plays an important role in the production of OLED devices and is one of the key factors affecting product yield. At present, with the widespread application of large-size OLED display panels, more and more consumers like OLED products with narrow bezels.

The encapsulation method of the existing OLED devices is mainly glass encapsulation. The OLED device is formed on the substrate and the thin film encapsulation layer is made. The cover glass is coated with UV-curable sealant and laser encapsulated glass glue (Laser Sealing), or Dam & Fill sealant is cured to provide a relatively closed environment for the light emitting device, which can achieve good water/oxygen barrier capacity within a certain period of time.

However, in the aforementioned packaging method, the distance from the OLED device to the edge of the substrate is the frame of the display device. To achieve a narrow frame design, the width of the package sealant needs to be sacrificed, thereby affecting the packaging effect, so it is difficult to achieve a narrower frame design.

Therefore, it is necessary to provide a display packaging structure and a manufacturing method thereof to solve the problems existing in the prior art.

technical problem

In the prior art, the distance from the OLED device to the edge of the substrate is the frame of the display device. To achieve a narrow frame design, the width of the package sealant needs to be sacrificed, thereby affecting the packaging effect, so it is difficult to achieve a narrower frame design.

Technical solutions

In view of this, the present invention provides a display packaging structure and a manufacturing method thereof to solve the problem of sacrificing the width of the packaging sealant in the prior art to achieve a narrow frame design.

The main purpose of the present invention is to provide a display packaging structure and a manufacturing method thereof, which can avoid sacrificing the width of the packaging sealant and avoid affecting the packaging effect, thereby achieving a narrower frame design.

The secondary objective of the present invention is to provide a display packaging structure and a manufacturing method thereof, which can reduce the distance from the OLED device to the edge of the display panel without affecting the packaging effect, thereby achieving an ultra-narrow frame design.

To achieve the foregoing objective of the present invention, an embodiment of the present invention provides a display packaging structure, including:

A cover, the cover has a main body and an extension perpendicular to the main body;

A display element substrate is provided with a plurality of display elements; wherein the cover body is combined with the display element substrate so that the extension part surrounds a side wall of the display element substrate, and the main body part is arranged on the On the display element substrate, a gap is formed between the extension portion and the side wall;

A filling gel is arranged in a display element substrate accommodating space formed by the main body part and the extension part in the cover; and

A sealant is filled in the gap.

In an embodiment of the present invention, the plurality of display elements are a plurality of organic light emitting diode elements.

In an embodiment of the present invention, the display packaging structure further includes: an packaging film layer is disposed on the display element substrate and encapsulates the plurality of display elements.

In an embodiment of the present invention, the display packaging structure further includes: the filling compound is disposed on a surface of the main body in the accommodating space of the display element substrate.

In an embodiment of the present invention, the filling colloid is in contact with the packaging film layer, so that the filling colloid abuts against an upper surface of the packaging film layer.

In an embodiment of the present invention, the display packaging structure further includes: a packaging plastic frame is disposed on the main body part, and is disposed around a side wall of the extension part to form a filling plastic containing space, wherein The filling colloid is filled in the filling colloid containing space.

In an embodiment of the present invention, the packaging plastic frame includes a getter dispersed in the packaging plastic frame.

In an embodiment of the present invention, the packaging film layer has a stepped portion, which is arranged around the packaging film layer; and

The packaging plastic frame has a protruding part protruding from a surface of the filling plastic body,

Wherein, the protruding part of the encapsulating plastic frame matches the shape of the stepped part of the encapsulating film layer.

Furthermore, another embodiment of the present invention provides a display packaging structure, including:

A cover, the cover has a main body and an extension;

A display element substrate is provided with a plurality of display elements; wherein the cover body is combined with the display element substrate so that the extension part surrounds a side wall of the display element substrate, and the main body part is arranged on the On the display element substrate, a gap is formed between the extension portion and the side wall; and

A sealant is filled in the gap.

In an embodiment of the present invention, the display packaging structure further includes: a filler is disposed in a display element substrate accommodating space formed by the main body portion and the extension portion, and the filler is disposed on the On a surface of the main body in the accommodating space of the display element substrate.

In addition, another embodiment of the present invention provides a manufacturing method of a display package structure, including the steps:

Providing a cover having a main body and an extension;

Providing a display element substrate on which a plurality of display elements are arranged;

The cover body is combined with the display element substrate, wherein the extension part surrounds a side wall of the display element substrate, and the main body part is disposed on the display element substrate, so that a gap is formed in the display element substrate. Between the extension part and the side wall; and

A sealant is provided and filled in the gap.

In an embodiment of the present invention, the manufacturing method of the display package structure includes: turning the cover over so that a display element substrate accommodation space of the display element substrate faces upward;

Disposing the display element substrate in the accommodating space of the display element substrate and abutting against a filling colloid provided on the cover, wherein the filling colloid is not cured;

Filling the sealant in the gap; and

Curing the filling colloid and the sealing colloid.

In an embodiment of the present invention, the filling gel and the sealing gel undergo a curing step at the same time, so that the filling gel and the sealing gel are cured to seal the display packaging structure.

In an embodiment of the present invention, after the filling colloid is filled in the filling colloid accommodating space, a pre-curing step is performed, so that the filling colloid is transformed into a B-stage state.

Beneficial effect

Compared with the prior art, the display packaging structure and manufacturing method of the present invention can reduce the distance from the OLED device to the edge of the display panel by wrapping the extension of the cover body around the side wall of the display element substrate without affecting the packaging effect. So as to achieve ultra-narrow frame design.

Description of the drawings

In order to make the above-mentioned content of the present invention more obvious and understandable, the following is a detailed description of preferred embodiments in conjunction with the accompanying drawings:

FIG. 1 is a schematic diagram of the display package structure of the first embodiment of the present invention.

2A to 2D are schematic diagrams of the manufacturing method of the display package structure according to the first embodiment of the present invention.

3 is a schematic diagram of the display package structure of the second embodiment of the present invention.

Embodiments of the invention

The description of the following embodiments refers to the attached drawings to illustrate specific embodiments that the present invention can be implemented. Furthermore, the directional terms mentioned in the present invention, such as up, down, top, bottom, front, back, left, right, inside, outside, side, surrounding, center, horizontal, horizontal, vertical, vertical, axial, The radial direction, the uppermost layer or the lowermost layer, etc., are only the direction of reference to the attached drawings. Therefore, the directional terms used are used to describe and understand the present invention, rather than to limit the present invention.

Please refer to FIG. 1, the first embodiment of the present invention provides a display structure in order to achieve the foregoing objective of the present invention. The display structure includes: a cover 10 having a main body portion 11A and an extension portion 11B; and a display element substrate 20 having a substrate 21 provided with a plurality of display elements 22 . Hereinafter, the detailed structure, assembly relationship and operation principle of the above-mentioned components of the first embodiment of the present invention will be described in detail by using FIG. 1.

Please refer to FIG. 1, an embodiment of the present invention provides a display packaging structure in order to achieve the foregoing objective of the present invention. In this embodiment, the cover 10 has the main body portion 11A in the shape of a flat plate and the extension portion 11B perpendicular to the main body portion 11A. The extension portion 11B is arranged around the main body portion 11A to form A accommodating space for a display element substrate. Preferably, the cover 10 is a transparent glass cover 10.

Optionally, a filler 12 is disposed in the display device substrate accommodating space formed by the main body portion 11A and the extension portion 11B, and the filler 12 is disposed in the display device substrate accommodating space On a surface of the main body portion 11A. Preferably, the filling colloid 12 is a transparent optical colloid. Alternatively, the filled colloid 12 is a filled colloid 12 containing a phosphor that can excite blue, red, or green light. Furthermore, alternatively, the filled colloid 12 is a quantum dot film.

Optionally, the cover 10 further includes: an encapsulating plastic frame 13 arranged on the main body portion 11A and arranged around a side wall of the extension portion 11B to form a filling gel containing space. Preferably, the filling gel 12 is filled in the filling gel containing space. Optionally, the packaging plastic frame 13 has a protrusion 13A protruding from a surface of the filling plastic body 12. In this embodiment, a thickness of the encapsulating plastic frame 13 is greater than a thickness of the filling plastic body 12. For example, the thickness of the packaging plastic frame 13 is twice the thickness of the filling plastic body 12.

Preferably, the packaging plastic frame 13 includes a getter dispersed in the packaging plastic frame 13. Alternatively, the plastic encapsulation frame 13 includes a desiccant dispersed in the plastic encapsulation frame 13.

In this embodiment, the substrate 21 is a glass substrate. Preferably, the plurality of display elements 22 are a plurality of organic light emitting diode elements. In this embodiment, the display element substrate 20 includes: a first electrode layer, a hole transport layer (HTL), a light emitting layer (EL), an electron transport layer (ETL), and a second electrode layer. The hole transport layer is provided on the first electrode layer; the light emitting layer is provided on the hole transport layer; the electron transport layer is provided on the light emitting layer; the second electrode layer is provided On the electron transport layer. Preferably, the first electrode layer is a transparent anode layer and the second electrode layer is a transparent cathode layer. Preferably, the first electrode layer and the second electrode layer are made of indium tin oxide (ITO).

1, the cover 10 is combined with the display element substrate 20, so that the extension portion 11B surrounds a side wall of the display element substrate 20, and the main body portion 11A is disposed on the On the display element substrate 20, a gap is formed between the extension portion 11B and the side wall; and a sealing compound 30 is filled in the gap. Preferably, the water vapor transmission rate of the sealant 30 at atmospheric pressure is less than 10-6 g/m²/day, and the oxygen transmission rate is less than 10-5 ml/m²/day.

Preferably, a projection area of the display element substrate 20 is smaller than a projection area of the main body portion 11A, so that the display element substrate 20 can be embedded in the display element substrate accommodating space of the cover 10 as a whole. The present invention can adjust the frame of the display through the thickness of the extension 11B and the gap. When a display design with a very narrow frame is to be realized, the thickness of the extension 11B and the width of the gap can be reduced to shorten The distance from the edge of the plurality of display elements to the extension portion 11B.

In this embodiment, the display packaging structure further includes: an packaging film layer 23 is disposed on the display element substrate 20 to package the plurality of display elements 22.

Preferably, the filling gel 12 is in contact with the packaging film layer 23 so that the filling gel 12 abuts against an upper surface of the packaging film layer 23.

Optionally, the encapsulation plastic frame 13 and the encapsulation film layer 23 have a structural shape matching. Preferably, the packaging film layer 23 has a stepped portion 23A disposed around the packaging film layer 23; and the packaging rubber frame 13 has a protruding portion 13A protruding from a surface of the filling gel 12, wherein The protruding portion 13A of the encapsulating plastic frame 13 and the step portion 23A of the encapsulating film layer 23 have a shape matching.

Please refer to FIGS. 2A to 2D, which show a schematic flow chart of a manufacturing method of a display package structure according to a first embodiment of the present invention. The manufacturing method includes the steps:

(S11) Provide a cover body 10 having a main body portion 11A and an extension portion 11B;

(S12) A display element substrate 20 is provided, and a plurality of display elements 22 are provided on the display element substrate 20;

(S13) Combine the cover 10 with the display element substrate 20, wherein the extension portion 11B surrounds a side wall of the display element substrate 20, and the main body portion 11A is disposed on the display element substrate 20, so that a gap is formed between the extension portion 11B and the side wall; and

(S14) Provide a sealant 30 to fill the gap.

Preferably, the plurality of display elements 22 are a plurality of organic light emitting diode elements.

The manufacturing method of the display packaging structure further includes: providing a packaging film layer 23 on the display element substrate 20 and packaging the plurality of display elements 22.

In the above step of providing the cover 10, it further includes: providing a filler 12 in a display element substrate accommodating space formed by the main body portion 11A and the extension portion 11B, and the filler 12 is disposed On a surface of the main body 11A in the accommodating space of the display element substrate.

In this embodiment, the step of combining the cover body 10 with the display element substrate 20 further includes: contacting the filling gel 12 with the packaging film layer 23, so that the filling gel 12 Abut against an upper surface of the packaging film layer 23.

Optionally, before providing the step of filling the colloid 12, it further comprises:

Providing an encapsulating plastic frame 13 on the main body portion 11A and surrounding a side wall of the extension portion 11B to form a filling gel containing space; and

The filling gel 12 is filled in the filling gel containing space.

Optionally, the packaging plastic frame 13 includes a getter dispersed in the packaging plastic frame 13.

Optionally, the packaging film layer 23 has a stepped portion 23A disposed around the packaging film layer 23; and the packaging rubber frame 13 has a protruding portion 13A protruding from a surface of the filling gel 12, wherein The protruding portion 13A of the encapsulating plastic frame 13 and the step portion 23A of the encapsulating film layer 23 have a shape matching.

Preferably, the manufacturing method of the display packaging structure includes:

Turn the cover body 10 over so that the display element substrate accommodation space of the display element substrate 20 faces upward;

Placing the display element substrate 20 in the accommodating space of the display element substrate, and abutting against the filling gel 12 provided on the cover 10, wherein the filling gel 12 is not cured;

Filling the sealant 30 in the gap; and

The filling gel 12 and the sealing gel 30 are cured.

Preferably, after the filled colloid 12 is filled in the filled colloid accommodating space, a pre-curing step is performed, so that the filled colloid 12 is transformed into a B-stage state. After the sealing compound 30 is filled in the gap, the filling compound 12 and the sealing compound 30 undergo a curing step at the same time, so that the filling compound 12 and the sealing compound 30 are cured to seal the display package structure.

Please refer to FIG. 3, which shows a schematic diagram of a display package structure according to a second embodiment of the present invention. The display structure of the second embodiment of the present invention is similar to that of the first embodiment, and generally uses the same component names and drawing numbers. The difference is that an array cover with a plurality of cover units 10 is provided, and the array cover Each of the plurality of cover units 10 has a display element substrate accommodating space, and each of the display element substrate accommodating spaces is provided with a display element substrate 20 respectively. Furthermore, a gap between each cover unit 10 and each display element substrate 20 is filled with a sealant 30. After each cover unit 10 and each display element substrate 20 are packaged, all single steps are performed on the array cover to form multiple display packaging structures of the first embodiment.

As mentioned above, compared with the existing OLED device encapsulation method is mainly glass encapsulation, the OLED device is formed on the substrate and the thin film encapsulation layer is made, and the cover glass is coated with UV-curable sealant and laser Encapsulated glass glue (Laser Sealing), or Dam & Fill sealant is cured to provide a relatively closed environment for the light emitting device, which can achieve good water/oxygen barrier capacity within a certain period of time. However, in the existing packaging methods, if the OLED device wants to achieve a narrow frame design, it is necessary to sacrifice the width of the packaging sealant, thereby affecting the packaging effect. The display packaging structure and the manufacturing method thereof of the present invention can reduce the distance from the OLED device to the edge of the display panel without affecting the packaging effect by wrapping the extension of the cover body around the side wall of the display element substrate, thereby achieving an ultra-narrow frame design .

The present invention has been described in the above-mentioned related embodiments, but the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, modifications and equivalent arrangements included in the spirit and scope of the claims are all included in the scope of the present invention.

Claims

A display packaging structure, including:

A cover, the cover has a main body and an extension perpendicular to the main body;

A display element substrate is provided with a plurality of display elements; wherein the cover body is combined with the display element substrate so that the extension part surrounds a side wall of the display element substrate, and the main body part is arranged on the On the display element substrate, a gap is formed between the extension portion and the side wall;

A filling gel is arranged in a display element substrate accommodating space formed by the main body part and the extension part in the cover; and

A sealant is filled in the gap.
8. The display packaging structure of claim 1, wherein the plurality of display elements are a plurality of organic light emitting diode elements.
2. The display packaging structure of claim 1, wherein the display packaging structure further comprises: an packaging film layer is disposed on the display element substrate and encapsulates the plurality of display elements.
3. The display packaging structure of claim 1, wherein the display packaging structure further comprises: the filling compound is disposed on a surface of the main body in the accommodating space of the display element substrate.
7. The display packaging structure of claim 4, wherein the filling gel is in contact with the packaging film layer, so that the filling gel abuts against an upper surface of the packaging film layer.
4. The display packaging structure of claim 4, wherein the display packaging structure further comprises: a packaging plastic frame is disposed on the main body portion, and is disposed around a side wall of the extension portion to form a filling plastic housing Space, wherein the filling colloid is filled in the filling colloid containing space.
7. The display packaging structure of claim 6, wherein the packaging plastic frame includes a getter dispersed in the packaging plastic frame.
7. The display packaging structure of claim 6, wherein the packaging film layer has a stepped portion disposed around the packaging film layer; and

The packaging plastic frame has a protruding part protruding from a surface of the filling plastic body,

Wherein, the protruding part of the encapsulating plastic frame matches the shape of the stepped part of the encapsulating film layer.
A display packaging structure, including:

A cover, the cover has a main body and an extension;

A display element substrate is provided with a plurality of display elements; wherein the cover body is combined with the display element substrate so that the extension part surrounds a side wall of the display element substrate, and the main body part is arranged on the On the display element substrate, a gap is formed between the extension portion and the side wall; and

A sealant is filled in the gap.
9. The display packaging structure of claim 9, wherein the plurality of display elements are a plurality of organic light emitting diode elements.
9. The display packaging structure of claim 9, wherein the display packaging structure further comprises: an packaging film layer disposed on the display element substrate and packaging the plurality of display elements.
9. The display packaging structure of claim 9, wherein the display packaging structure further comprises: a filler is disposed in a display element substrate accommodating space formed by the main portion and the extension portion, and the filler is It is arranged on a surface of the main body in the accommodating space of the display element substrate.
12. The display packaging structure of claim 12, wherein the filling gel is in contact with the packaging film layer, so that the filling gel abuts against an upper surface of the packaging film layer.
The display packaging structure of claim 12, wherein the display packaging structure further comprises: a packaging plastic frame is disposed on the main body portion, and is disposed around a side wall of the extension portion to form a filling plastic housing Space, wherein the filling colloid is filled in the filling colloid containing space.
15. The display packaging structure of claim 14, wherein the packaging plastic frame contains a getter dispersed in the packaging plastic frame.
14. The display packaging structure of claim 14, wherein the packaging film layer has a stepped portion and is disposed around the packaging film layer; and

The packaging plastic frame has a protruding part protruding from a surface of the filling plastic body,

Wherein, the protruding part of the encapsulating plastic frame matches the shape of the stepped part of the encapsulating film layer.
A manufacturing method of a display packaging structure includes the steps:

Providing a cover having a main body and an extension;

Providing a display element substrate on which a plurality of display elements are arranged;

The cover body is combined with the display element substrate, wherein the extension part surrounds a side wall of the display element substrate, and the main body part is disposed on the display element substrate, so that a gap is formed in the display element substrate. Between the extension part and the side wall; and

A sealant is provided and filled in the gap.
17. The method of manufacturing a display package structure according to claim 17, wherein the method of manufacturing the display package structure comprises: turning the cover over so that a display element substrate accommodation space of the display element substrate faces upward;

Disposing the display element substrate in the accommodating space of the display element substrate and abutting against a filling colloid provided on the cover, wherein the filling colloid is not cured;

Filling the sealant in the gap; and

Curing the filling colloid and the sealing colloid.
18. The method of manufacturing a display packaging structure according to claim 18, wherein the filling glue and the sealing glue undergo a curing step at the same time, so that the filling glue and the sealing glue are cured to seal the display packaging structure.
17. The manufacturing method of the display packaging structure of claim 18, wherein after the filling colloid is filled in the filling colloid accommodating space, a pre-curing step is performed, so that the filling colloid is transformed into a B-stage (B- stage) state.