WO2014187032A1

WO2014187032A1 - Oled display panel, packaging method therefor, and display apparatus

Info

Publication number: WO2014187032A1
Application number: PCT/CN2013/081460
Authority: WO
Inventors: 姚继开
Original assignee: 京东方科技集团股份有限公司
Priority date: 2013-05-24
Filing date: 2013-08-14
Publication date: 2014-11-27
Also published as: CN103325813B; CN103325813A

Abstract

An OLED display panel comprises: an OLED substrate (201), a packaging cover plate (203) disposed opposite to the OLED substrate (201), and a glue film (204) disposed between the OLED substrate (201) and the packaging cover plate (203). The OLED display panel also comprises a moisture-proof object (205) used for absorbing moisture. The moisture-proof object (205) is disposed in the glue film (204). By using the solution, the increase of the volume of the OLED display panel is avoided. Also provided are a method for packaging the OLED display panel and a display apparatus comprising the OLED display panel.

Description

OLED display panel, packaging method thereof, and display device

Embodiments of the present invention relate to an OLED display panel, a packaging method thereof, and a display device. Background technique

An Organic Light-Emitting Diode (OLED) display is a new type of display device. Compared with liquid crystal displays, OLED displays have the advantages of self-illumination, fast response and wide viewing angle, and can be flexibly displayed, transparently displayed, and displayed in 3D, thus achieving rapid development and popularization.

As shown in FIG. 1 , the current OLED display panel is generally packaged by means of a plastic package. The process of encapsulation by means of a glue encapsulation is as follows: a film 104 is formed on the OLED substrate 101 (ie, the substrate on which the OLED structure is formed), and the OLED substrate 101 is disposed opposite to the package cover 103 to complete the package. Since moisture in the air may penetrate the film 104, the lifetime of the organic luminescent material in the OLED structure 102 is negatively affected, so that the lifetime of the organic luminescent material in the OLED structure 102 is prevented from being avoided as much as possible by the moisture in the air. Negative effects, when the OLED display panel is encapsulated, a moisture barrier layer 105 completely covering the OLED structure is also disposed between the OLED substrate 101 and the adhesive film 104. Since the moisture barrier layer 105 has a certain thickness and width, the moisture barrier layer 105 increases the volume of the OLED display panel.

In summary, in order to prevent the water vapor in the air from having a negative influence on the organic luminescent material in the OLED structure, the current OLED display panel generally includes a moisture barrier layer having a certain thickness and width, thereby increasing the volume of the OLED display panel. Summary of the invention

An embodiment of the present invention provides an OLED display panel, a packaging method thereof, and a display device for solving the problem that an OLED display panel is increased in volume due to a moisture barrier layer.

An OLED display panel according to an embodiment of the present invention includes: an OLED substrate, a package cover disposed opposite the OLED substrate, a film disposed between the OLED substrate and the package cover, and a moisture-proof material that absorbs moisture; the moisture-proof material is disposed in the film. Another embodiment of the present invention provides a display device including the OLED display panel. According to still another embodiment of the present invention, an OLED display panel packaging method includes: forming a film on an OLED substrate and/or a package cover, wherein the film includes moisture-proofing materials for absorbing moisture; The OLED substrate is disposed opposite to the package cover plate to complete the package. DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below. It is obvious that the drawings in the following description relate only to some embodiments of the present invention, rather than to the present invention. limit.

1 is a schematic structural view of an OLED display panel in the prior art;

2 is a schematic structural diagram of an OLED display panel according to an embodiment of the present invention;

3 is a side view of an OLED display panel according to an embodiment of the present invention;

4 is a top plan view of an OLED display panel according to an embodiment of the present invention;

5 to 5D are side views of an OLED display panel according to an embodiment of the present invention;

6 is a side view of an OLED display panel according to an embodiment of the present invention;

7 is a schematic structural view of a film according to an embodiment of the present invention;

FIG. 8 is a schematic flow chart of a method for packaging an OLED display panel according to an embodiment of the present invention. detailed description

The technical solutions of the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings of the embodiments of the present invention. It is apparent that the described embodiments are part of the embodiments of the invention, rather than all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the described embodiments of the present invention without departing from the scope of the invention are within the scope of the invention.

An OLED display panel according to an embodiment of the present invention includes: an OLED substrate, and the

a package cover plate disposed opposite to the OLED substrate, and a film disposed between the OLED substrate and the package cover plate, the display panel further comprising a moisture barrier for absorbing moisture, wherein the moisture barrier is disposed in the film . Since the moisture-proof material for absorbing moisture is disposed in the film, when the moisture in the air penetrates the film, the moisture contained in the film absorbs moisture in the air. This prevents moisture in the air from having a negative or adverse effect on the organic luminescent material in the OLED structure. Thus, implemented in accordance with the present invention The OLED display panel does not need to be provided with a moisture barrier layer between the OLED substrate and the adhesive film, thereby avoiding an increase in the volume of the OLED display panel.

It should be noted that the OLED substrate of the embodiment of the invention is a substrate formed with an OLED structure. As shown in FIG. 2, an OLED display panel provided by an embodiment of the present invention includes an OLED substrate 201 formed with an OLED structure 202, and a package cover disposed opposite to the OLED substrate 201.

203, a film 204 disposed between the OLED substrate 201 and the package cover 203, and a moisture barrier 205 for absorbing moisture. The moisture barrier 205 is disposed in the adhesive film 204, such as in the dispersion film 204.

For example, the OLED display panel provided by the embodiment of the present invention includes at least one moisture barrier 205. The more the moisture barrier 205 included in the OLED display panel, the better the effect of the OLED display panel in absorbing moisture. The moisture barrier 205 can be any object capable of absorbing moisture, such as a desiccant or an object including a desiccant.

For example, the moisture barrier 205 may be a chemisorbent desiccant or a physical adsorbent desiccant such as a solid desiccant, a liquid desiccant, a clear desiccant, an opaque desiccant, and a black desiccant.

For example, the moisture barrier 205 is a particulate desiccant such as a silica gel desiccant.

If the moisture barrier 205 is a silica gel desiccant, there is no secondary chemical contamination when the moisture barrier 205 absorbs moisture.

For example, the moisture barrier 205 can be of any shape, such as a regular shape or an irregular shape. For example, when the shape of the moisture barrier 205 is a regular shape, it includes one or more of a cylinder, a cone, and a sphere.

For example, the size of the moisture barrier 205 can be set according to specific needs, but it is necessary to ensure that the moisture barrier 205 is disposed in the adhesive film 204.

Any of the embodiments in which the moisture barrier 205 is provided in the adhesive film 204 is applicable to the embodiment of the present invention. For example, the moisture barrier 205 may be mixed in the adhesive film 204, the moisture barrier 205 may be inserted into the adhesive film 204, or the adhesive film 204 may be coated with the moisture barrier 205 or the like.

Hereinafter, an embodiment in which the moisture-proofing material 205 of the embodiment of the present invention is disposed in the adhesive film 204 will be described by taking the moisture-proofing material 205 as a granular desiccant or an object including a granular desiccant. Other implementations are similar to these implementations and will not be described again here.

First, the moisture-proof material 205 is a granular desiccant.

Preferably, the moisture barrier 205 is mixed, for example, in the film 204. The moisture barrier 205 may be uniformly mixed in the film 204 or may be unevenly mixed in the film 204. When the moisture barrier 205 is uniformly mixed in the adhesive film 204, the moisture barrier 205 mixed in the adhesive film 204 is uniformly distributed; when the moisture barrier 205 is unevenly mixed in the adhesive film 204, it is mixed in the adhesive film 204. The moisture barrier 205 collects in at least one region of the film 204.

When the moisture barrier 205 is unevenly mixed in the film 204, when the plurality of moisture barriers 205 are gathered together, the shape of the region where the moisture barrier is collected may be a regular shape or an irregular shape.

For example, the shape of the area where the moisture barrier is collected includes a circle and/or a polygon.

For example, as shown in Fig. 2, the moisture barrier 205 is substantially uniformly mixed in the film 204.

As shown in Fig. 3, the shape of the region where the moisture barrier is collected may be a regular shape or an irregular shape. The area A in Fig. 3 is a region where four moisture barriers 205 are gathered together, and the shape of the A region is a regular square; the region B in Fig. 3 is a region where two moisture barriers 205 are gathered together, and the region B is The shape is a regular circle; the C area in Fig. 3 is a region where three moisture barriers 205 are gathered together, and the shape of the C region is an irregular shape.

For example, the moisture barrier 205 may be mixed in the entire film 204 or may be mixed in the partial film 204.

For example, the moisture barrier 205 is mixed in the adhesive film 204 around the OLED structure 202, and the projection of the moisture barrier 205 mixed in the adhesive film 204 on the OLED substrate 201 is quadrangularly distributed.

For example, as shown in FIG. 4, the projection of the moisture barrier 205 mixed in the adhesive film 204 on the OLED substrate 201 is distributed in a rectangular shape.

For example, any of the embodiments in which the moisture barrier 205 is mixed with the moisture barrier 205 for the OLED display panel is suitable for use in the embodiment of the present invention, and several more typical cases will be described below.

1. The moisture barrier 205 is mixed in the adhesive film 204 and is in contact with the OLED substrate 201.

For example, as shown in Fig. 5A, the moisture barrier 205 is mixed in the adhesive film 204, the A end of the moisture barrier 205 is in contact with the OLED substrate 201, and the B end of the moisture barrier 205 is not in contact with the package cover 203.

2. The moisture barrier 205 is mixed in the adhesive film 204 and is in contact with the package cover 203.

For example, as shown in Fig. 5B, the moisture barrier 205 is mixed in the adhesive film 204, the a end of the moisture barrier 205 is in contact with the package cover 203, and the b end of the moisture barrier 205 is not in contact with the OLED substrate 201.

3. The moisture barrier 205 is mixed in the adhesive film 204 and is in contact with the OLED substrate 201 and the package cover 203.

For example, as shown in FIG. 5C, the moisture barrier 205 is mixed in the film 204, and the moisture barrier 205 It is in contact with the OLED substrate 201 and the package cover 203. The contact point of the moisture barrier 205 with the package cover 203 is point E, and the contact point of the moisture barrier 205 with the OLED substrate 201 is point F.

4. The moisture barrier 205 is mixed in the adhesive film 204 and is not in contact with the OLED substrate 201 and the package cover 203 (i.e., the moisture barrier 205 does not contact the OLED substrate 201 and does not contact the package cover 203).

For example, as shown in Fig. 5D, the moisture barrier 205 is mixed in the adhesive film 204, and the moisture barrier 205 is not in contact with the OLED substrate 201 and is not in contact with the package cover 203.

2. Moisture Resistant 205 An object comprising a particulate desiccant.

For example, the moisture barrier 205 is a first deposit obtained by etching a mixture comprising a particulate desiccant and a photosensitive liquid material.

For example, the moisture barrier 205 is attached to the OLED substrate 201 and/or the package cover 203, and the film 204 is coated with the moisture barrier 205.

For example, as shown in FIG. 6, a portion of the moisture barrier 205 is attached to the OLED substrate 201, and another portion of the moisture barrier 205 is attached to the package cover 203, and the adhesive film 204 is coated with the moisture barrier 205.

Since the mixture of the particulate desiccant and the photosensitive liquid material can be fixed on the OLED substrate 201 and/or the package cover 203, the first obtained by etching the mixture including the particulate desiccant and the photosensitive liquid material is obtained. The attachment can be attached to the OLED substrate 201 and/or the package cover 203. Such as photosensitive resin.

The shape of the moisture barrier 205 may be related to the shape of the mask used in the etching process. For example, the shape of the moisture barrier and/or the oxide may be a regular shape or an irregular shape; preferably, the shape of the moisture barrier and/or the oxide includes a cylindrical shape and/or a sphere

When the shape of the moisture barrier 205 includes a cylindrical shape and/or a spherical shape, the moisture vapor 205 contacts the water vapor in the air in a relatively large area, and the OLED display panel absorbs water vapor preferably.

When the moisture barrier 205 is attached to the OLED substrate 201 and the package cover 203, the OLED display panel has a better effect of absorbing moisture. An oxidation preventing 206; an oxidation preventing 206 is provided in the adhesive film 204.

The OLED display panel includes an oxide 206 that can reduce oxygen, thereby preventing oxygen in the air from negatively affecting the organic luminescent material in the OLED structure 202. The more the anti-oxidation 206 included in the OLED display panel, the better the effect of reducing the oxygen of the OLED display panel.

For example, the oxidation preventing 206 can be any object capable of reducing oxygen, such as a reducing agent or an object including a reducing agent. For example, the oxidation preventing 206 can be a chemical reducing agent or a physical reducing agent, such as a solid reducing agent.

For example, the oxidation preventing 206 is a particulate reducing agent (e.g., Fe (iron) particles) or a second deposit obtained by etching a mixture comprising a particulate reducing agent and a photosensitive liquid material.

For example, the embodiment of the shape and size of the oxidation preventing 206 is similar to the embodiment of the shape and size of the moisture barrier 205, and will not be described herein.

For example, the embodiment in which the oxidation preventing resistor 206 is disposed in the adhesive film 204 is similar to the embodiment in which the moisture barrier 205 is disposed in the adhesive film 204, and details are not described herein again.

For example, the moisture barrier 205 and/or the oxidation preventing 206 mixed in the film 204 are uniformly distributed; or the moisture barrier 205 and/or the oxide oxide 206 mixed in the film 204 are collected in at least one region of the film 204. .

For example, the shape of the area where the moisture barrier 205 and/or the oxidation preventing 206 are collected includes a circle and/or a polygon. For example, the projection of the moisture barrier 205 and/or the oxide oxide 206 mixed in the adhesive film 204 on the OLED substrate 201 is quadrangularly distributed.

For example, moisture barrier 205 and/or oxide oxide 206 are attached to OLED substrate 201 and/or package cover 203, and film 204 is coated with moisture barrier 205 and oxide 206.

For example, the shape of the moisture barrier 205 and/or the oxidation resistant 206 includes a cylindrical shape and/or a spherical shape. For example, as shown in FIG. 7, the adhesive film 204 is disposed on a region of the OLED substrate 201 that is not covered by the OLED structure 202 and the thickness of the adhesive film 204 is equal to the thickness of the OLED structure 202.

For example, when the adhesive film 204 is disposed on a region of the OLED substrate 201 that is not covered by the OLED structure 202 and the thickness of the adhesive film 204 is equal to the thickness of the OLED structure 202, the thickness of the OLED display panel can be reduced, thereby reducing the OLED display panel. volume.

For example, the display device of the embodiment of the invention includes the OLED display panel described above. As shown in FIG. 8, an OLED display panel packaging method according to an embodiment of the present invention includes, for example, Next steps:

Step 801, forming a film on the OLED substrate and/or the package cover, wherein the film comprises moisture-proofing materials for absorbing moisture;

Step 802: Set the OLED substrate opposite to the package cover to complete the package.

For example, the film may further contain an antioxidant for reducing oxygen.

For example, the moisture barrier is a particulate desiccant, and the antioxidant is a particulate reducing agent. Forming a film containing moisture-proofing and anti-oxidation on the OLED substrate and/or the package cover, for example, moisture-proofing and anti-oxidation may be mixed into the film, and moisture-proof and anti-oxidation may be mixed The film is disposed on the OLED substrate and/or the package cover.

For example, a method of mixing two or more objects in the prior art may be used to mix moisture-proof substances and anti-oxidation into the film, for example, moisture-proofing materials and anti-oxidation agents may be added to the film, and stirring is added. Moisture-proof and anti-oxidant film to achieve moisture and anti-oxidation into the film.

For example, after the moisture barrier and the anti-oxidation are mixed into the adhesive film, the adhesive film mixed with the moisture barrier and the anti-oxidation may be disposed on the OLED substrate and/or the package cover, and may also be protected against moisture, The mixture of the anti-oxidation and the film is subjected to a defoaming treatment.

The defoaming treatment of a mixture of moisture-proofing, anti-oxidation and film can improve the adhesion of moisture-proof and anti-oxidation to the film.

For example, a method of disposing a film on an OLED substrate and/or a package cover in the prior art may be used to provide a film with moisture-proof and anti-oxidation on the OLED substrate and/or the package cover, such as The film with the moisture barrier and the anti-oxidation may be applied on the OLED substrate and/or the package cover by a coating method.

For example, the moisture barrier is a first deposit obtained by etching a mixture comprising a particulate desiccant and a photo-sensitive liquid material, and the anti-oxidation is etching the mixture comprising the particulate reducing agent and the photosensitive liquid material. The second deposit obtained after the treatment forms a film containing moisture-proofing and anti-oxidation on the OLED substrate and/or the package cover, for example, an attached moisture-proofing substance can be formed on the OLED substrate and/or the package cover. And anti-oxidation, and the film is covered with the moisture-proofing material and the anti-oxidation.

For example, an attached moisture barrier and an oxide are formed on the OLED substrate and/or the package cover. For example, the moisture barrier and the antioxidant can be mixed with the photosensitive liquid material, and the moisture barrier and oxidation prevention can be prevented. A mixture of the object and the photosensitive liquid material is disposed on the OLED substrate and/or the package cover; and the moisture barrier and the oxide are adhered on the OLED substrate and/or the package cover by a photolithography process.

For example, the shape of the moisture barrier and oxide that adheres to the OLED substrate and/or the package cover is related to the mask used in the lithography process.

The film is coated with the moisture barrier and the oxide. For example, the film may be provided on the OLED substrate and/or the package cover to which the moisture barrier and the oxide are adhered.

Since the film is a colloid, after the film is disposed on the OLED substrate and/or the package cover to which the moisture barrier and the oxide are adhered, the film covers the moisture barrier and the oxide, thereby realizing A film containing moisture barrier and oxide is formed on the OLED substrate and/or the package cover.

Although the preferred embodiment of the invention has been described above, those skilled in the art can make further changes and modifications to these embodiments once they have learned the basic inventive concept. Therefore, it is intended that the appended claims be construed as

Claims

claims

1. An OLED display panel, including an OLED substrate, a packaging cover disposed opposite to the OLED substrate, an adhesive film disposed between the OLED substrate and the packaging cover, and a moisture-proof material that absorbs water vapor; wherein, the The moisture-proof material is provided in the adhesive film.

2. The OLED display panel as claimed in claim 1, wherein the moisture-proof material is a granular desiccant.

3. The OLED display panel according to claim 1 or 2, further comprising an anti-oxidation agent for reducing oxygen; wherein the anti-oxidation agent is provided in the adhesive film.

4. The OLED display panel according to claim 3, wherein the anti-oxidation agent is a granular reducing agent.

5. The OLED display panel according to claim 3 or 4, wherein the moisture-proof material and/or anti-oxidant mixed in the adhesive film are evenly distributed; or

The moisture-proof substance and/or antioxidant mixed in the adhesive film is accumulated in at least one area of the adhesive film.

6. The OLED display panel according to claim 5, wherein the shape of the area where the moisture-proof material and/or the oxidation-proof material is gathered includes a circle and/or a polygon.

7. The OLED display panel according to claim 3 or 4, wherein the projection of the moisture-proof material and/or anti-oxidation material mixed in the adhesive film on the OLED substrate is in a quadrilateral distribution.

8. The OLED display panel according to any one of claims 1 to 7, wherein the moisture-proof material is a first attachment obtained by etching a mixture including a granular desiccant and a photosensitive liquid material.

9. The OLED display panel according to any one of claims 4 to 8, wherein the anti-oxidation agent is a second attachment obtained by etching a mixture including a granular reducing agent and a photosensitive liquid material.

10. The OLED display panel according to any one of claims 1 to 9, wherein the moisture-proof material and/or anti-oxidation material are attached to the OLED substrate and/or the packaging cover, and the adhesive film covers all Described moisture-proof material and anti-oxidant.

11. The OLED display panel according to any one of claims 4 to 8, wherein the shape of the moisture-proof material and/or oxidation-proof material includes a cylindrical shape and/or a spherical shape.

12. The OLED display panel according to claims 1-11, wherein the adhesive film is provided on the area of the OLED substrate that is not covered by the OLED structure and the thickness of the adhesive film is equal to the thickness of the OLED structure.

13. A display device, including the OLED display panel according to any one of claims 1 to 12.

14. An OLED display panel packaging method, including:

A glue film is formed on the OLED substrate and/or the packaging cover, wherein the glue film contains a moisture-proof material for absorbing water vapor;

The OLED substrate and the packaging cover are arranged opposite to complete the packaging.

15. The method of claim 14, wherein the adhesive film further contains an antioxidant for reducing oxygen.

16. The method of claim 15, wherein the moisture-proof material is a granular desiccant, the anti-oxidant is a granular reducing agent, and the moisture-proof material and the anti-oxidation agent are formed on the OLED substrate and/or the packaging cover. Anti-oxidation films include:

Mix the moisture-proof substance and the anti-oxidation substance into the adhesive film, and place the adhesive film mixed with the moisture-proof substance and the anti-oxidation substance on the OLED substrate and/or the packaging cover.

17. The method of claim 15, wherein the moisture-proof material is a first attachment obtained by etching a mixture including a granular desiccant and a photosensitive liquid material, and the oxidation-proof material is a The second attachment obtained by etching a mixture of granular reducing agent and photosensitive liquid material to form an adhesive film containing moisture-proof and oxidation-proof substances on the OLED substrate and/or packaging cover includes:

Form an attached moisture-proof material and anti-oxidation material on the OLED substrate and/or the packaging cover, and cover the moisture-proof material and anti-oxidation material with an adhesive film.