CN219372996U

CN219372996U - OLED display module and display screen with same

Info

Publication number: CN219372996U
Application number: CN202320103993.XU
Authority: CN
Inventors: 李焕; 吴磊; 刘宏俊; 任海洋
Original assignee: Suzhou Qingyue Optoelectronics Technology Co Ltd
Current assignee: Suzhou Qingyue Optoelectronics Technology Co Ltd
Priority date: 2023-02-03
Filing date: 2023-02-03
Publication date: 2023-07-18
Anticipated expiration: 2033-02-03

Abstract

The utility model relates to an OLED display module and a display screen with the same, wherein the OLED display module comprises a glass substrate, an ITO anode, an organic light-emitting layer and a metal cathode are sequentially deposited on the back surface of the glass substrate from bottom to top, a packaging cover is sleeved and fixed on the outer side of the metal cathode, a polaroid is stuck on the front surface of the glass substrate, a thin film packaging layer is arranged on the outer side of the surface of the metal cathode, a water-blocking film layer is coated on the surface of the thin film packaging layer, and the packaging cover is sleeved on the outer layer of the water-blocking film layer. The application has good water-oxygen resistance, improves the overall working reliability and prolongs the service life.

Description

OLED display module and display screen with same

Technical Field

The utility model relates to the technical field of display equipment, in particular to an OLED display module and a display screen with the OLED display module.

Background

An OLED (Organic Light-Emitting Diode) belongs to a current-type Organic Light-Emitting device, and its basic structure is composed of a glass substrate, an Organic Light-Emitting material, a package cover, a driving IC, an FPC and other auxiliary materials. The service life of the OLED display screen is mainly influenced by organic materials, the organic materials are sensitive to water and oxygen, the organic materials are easy to lose efficacy when being corroded by water and oxygen, at the moment, the pixel points of the OLED display screen can be shrunk, the display brightness can be reduced due to shrinkage of the OLED pixels, and therefore the service life of the OLED display screen can be reduced.

At present, the method for preventing the organic material from being corroded by water and oxygen is that a desiccant or a drying sheet absorbing water and oxygen is added in the packaging cover, but the desiccant or the drying sheet also fails after absorbing certain water and oxygen, and the service life of the OLED display screen is also reduced, that is, the problem that the reliability of the OLED is reduced after the drying sheet fails in the conventional OLED display module and display screen

Therefore, how to improve the resistance of the OLED display module and the display screen to the oxygen corrosion is a technical problem which needs to be solved in the prior art.

Disclosure of Invention

The utility model aims to provide an OLED display module and a display screen with the OLED display module, which have good water and oxygen resistance, improve the overall working reliability and prolong the service life.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an OLED display module, which comprises a glass substrate, wherein an ITO anode, an organic light-emitting layer and a metal cathode are sequentially deposited on the back surface of the glass substrate from bottom to top, a packaging cover is sleeved and fixed on the outer side of the metal cathode, a polaroid is stuck on the front surface of the glass substrate, a thin film packaging layer is arranged on the outer side of the surface of the metal cathode, a water-blocking film layer is coated on the surface of the thin film packaging layer, and the packaging cover is sleeved on the outer layer of the water-blocking film layer.

For the above solutions, the applicant has further optimisation.

Optionally, a gap is reserved between the packaging cover and the surface of the water-blocking film layer, and a drying device for adsorbing internal moisture is attached to the inner side of the packaging cover.

Optionally, the drying device is attached to the middle part or two sides of the inner side wall of the packaging cover.

Optionally, the drying device is a solid desiccant tablet or a liquid desiccant.

Optionally, a driving IC is further disposed on the glass substrate, and the driving IC is electrically connected with the ITO anode or the metal cathode, and is used for controlling the operation of the display module.

Further, an FPC is further provided on the glass substrate, one side of the FPC is electrically connected to the driving IC, and the other side is electrically connected to an external system driving board.

Optionally, the packaging cover is made of glass, and the edge of the packaging cover is fixed on the back surface of the glass substrate through packaging glue.

Optionally, the thin film encapsulation layer is a transparent layer made of an inorganic material.

Optionally, the water blocking film layer is made of a nano waterproof material and completely covers the film encapsulation layer.

In particular, the application also provides a display screen, which comprises the OLED display module.

Compared with the prior art, the utility model has the advantages that:

the OLED display module of this application, it carries out once film packaging layer in advance, can seal the organic luminescent material that constitutes OLED display module pixel, isolated water oxygen, prevent that organic luminescent material from being damaged when subsequent technology preparation, then the surface plating one deck nanometer waterproof material constitutes the water blocking rete at film packaging layer, the area of water blocking rete is greater than film packaging layer, cover film packaging layer completely, can further strengthen the protection isolated water oxygen, prevent or prolong the time that water oxygen got into organic luminescent material, improve the operational reliability of OLED display module and have its display screen, increase of service life.

Drawings

Some specific embodiments of the utility model will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:

fig. 1 is a schematic structural view of an OLED display module according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of an OLED display module according to another embodiment of the present utility model.

The reference numerals are explained as follows:

1. the organic light-emitting device comprises a glass substrate, 2, an ITO anode, 3, an organic light-emitting layer, 4, a metal cathode, 5, a packaging cover, 6, a polaroid, 7, a film packaging layer, 8, a water-blocking film layer, 9, a driving IC,10, an FPC,11 and a drying sheet.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

The embodiment describes an OLED display module, as shown in fig. 1, including a glass substrate 1, wherein one light-emitting side of the glass substrate 1 is a front surface, and the other side of the glass substrate 1 is a back surface, with respect to the light-emitting direction in the drawing. The back of the glass substrate 1 is sequentially deposited with an ITO anode 2, an organic light-emitting layer 3 and a metal cathode 4 from bottom to top, a packaging cover 5 is fixedly sleeved on the outer side of the metal cathode 4 in order to package a functional main body inside the OLED display module, and a polarizer 6 is attached to the front of the glass substrate 1. Wherein:

the ITO anode 2 is formed on the surface of the glass substrate and is transparent, electrons are eliminated when current flows through the device, holes are added in the ITO anode 2, a conductive layer is generally deposited on the upper layer of the ITO anode 2, the conductive layer is generally formed by organic plastic molecules, the organic plastic molecules transport the holes from the anode, and polyaniline can be used as a conductive polymer of the OLED;

an organic light-emitting layer 3 composed of organic plastic molecules which transport electrons from the cathode 4, in which light-emitting process is performed, polyfluorene may be used as an emission layer polymer;

the cathode 4, which may be transparent or opaque, depending on the type of OLED, will inject electrons into the circuit and towards the organic light emitting layer 3 when a current is flowing in the device.

The specific luminescence process is as follows:

the battery or power supply of the OLED display module applies a voltage to two ends of the OLED display module, current (the current refers to the flow of electrons) flows from the cathode 4 to the anode and passes through the organic light-emitting layer 3, the cathode 4 outputs electrons to the organic light-emitting layer 3, the anode absorbs the electrons transmitted from the conducting layer, and holes are formed in the conducting layer;

at the junction of the organic light-emitting layer 3 and the conductive layer, electrons are combined with holes, and the holes are filled when the electrons encounter the holes, and when this happens, the electrons release energy in the form of photons, that is, light is emitted at the emitting layer, and the OLED display module emits light, and the light emits light from the front surface of the glass substrate. The color of the light depends on the type of organic molecules of the organic light emitting layer 3, and the manufacturer can place several organic thin films on the same OLED, so that a color display can be formed, while the brightness or intensity of the light depends on the magnitude of the applied current, and the larger the current, the higher the brightness of the light.

Specifically, in this embodiment, as shown in fig. 1, a thin film encapsulation layer 7 is disposed on the outer side of the surface of the metal cathode, a water blocking film layer 8 is coated on the surface of the thin film encapsulation layer 7, and the encapsulation cover 5 is sleeved on the outer layer of the water blocking film layer 8.

The OLED display module of this embodiment, it is first film encapsulation layer, can seal the organic luminescent material that constitutes OLED display module pixel, the isolated water oxygen, prevent that organic luminescent material from being damaged when subsequent technology makes, then the surface plating of film encapsulation layer is the water blocking rete that one deck nanometer waterproof material constitutes, the area of water blocking rete is greater than film encapsulation layer, cover film encapsulation layer completely, can further strengthen the protection isolated water oxygen, prevent or lengthen the time that water oxygen got into organic luminescent material, improve the operational reliability of OLED display module and have its display screen, increase of service life.

The film packaging layer 7 is a transparent layer made of inorganic material, wherein the film packaging layer 7 can be made of flexible material or inflexible material, and the packaging material mainly used is Al ₂ 0 ₃ And HfO ₂ Etc. While the water blocking film layer 8 is made of a nano waterproof material such as TPU material (Thermoplastic polyurethanes, named thermoplastic polyurethane elastomer rubber), PTFE material (Poly tetra fluoroethylene, named polytetrafluoroethylene) or the like, and the water blocking film layer 8 completely covers the film encapsulation layer 7.

In one embodiment, the encapsulation cover 5 is made of glass, and the edge of the encapsulation cover 5 is fixed on the back surface of the glass substrate 1 through encapsulation glue.

In order to prevent the external water vapor from gathering inside the encapsulation cover 5, a drying sheet 13 may be attached to the inner side surface of the encapsulation cover 5, a gap is left between the encapsulation cover 5 and the metal cathode 4, the encapsulation cover 5 is adhered to the glass substrate 1 through encapsulation adhesive, and part of the water vapor still enters into the gap between the encapsulation cover 5 and the metal cathode 4, and the drying sheet 13 can adsorb the water vapor entering into the gap.

In one embodiment, a drying device 11 for adsorbing the internal moisture is attached to the inner side of the encapsulation cover 5. A gap is reserved between the packaging cover 5 and the water-blocking film layer 8, the packaging cover 5 is adhered to the glass substrate 1 through packaging adhesive, although the packaging cover can play a role in isolating water vapor to a certain extent, part of water vapor still enters the gap between the packaging cover 5 and the water-blocking film layer 8, and the drying device 11 can absorb the water vapor entering the gap, so that the heating effect of the product life can be improved.

The OLED display module comprises two different transparent and non-transparent display modes, namely whether the effect of the display screen presented in the shutdown state is transparent or non-transparent. In the existing transparent products, due to the limitation of the display window, the area where the drying device can be placed is very small, even can be said to be placed without space, so that a proper drying device is needed.

In an embodiment, as shown in fig. 1, the drying device 11 is a solid drying sheet, and the solid drying sheet has a larger size, so that the solid drying sheet is disposed at a position attached to the middle of the inner sidewall of the packaging cover 5, and the solution of this embodiment is particularly suitable for a non-transparent OLED display module.

In an embodiment, as shown in fig. 2, the drying device 11 is a liquid drying agent, which has a smaller size and can be flexibly arranged, and can be attached to the middle part of the inner side wall of the packaging cover 5 or attached to both sides of the inner side wall of the packaging cover 5. The liquid desiccant is preferably disposed on both sides of the inner sidewall of the package cover 5, which is limited by the display window of the transparent OLED display module.

In an embodiment, a driving IC9 is further disposed on the glass substrate 1, and the driving IC9 is electrically connected to the ITO anode 2 or the metal cathode 4, for controlling the operation of the display module.

In a further embodiment, an FPC10 is further disposed on the glass substrate 1, and one side of the FPC10 is electrically connected to the driving IC9, and the other side is electrically connected to an external system driving board.

In an embodiment, a display screen is provided, comprising an OLED display module as described in any of the preceding embodiments.

In one embodiment, the OLED display module further includes an FPC10, the glass substrate 1 is further provided with a driving IC9, the driving IC9 is pressed on a first metal wire integrated on the ITO anode layer by ACF conductive adhesive, the FPC10 is pressed on a second metal wire integrated on the ITO anode layer by ACF conductive adhesive, the driving IC9 is used for controlling the operation of the display module, one side of the FPC10 is abutted to the driving IC9 by the etched second metal wire, and the other side is electrically connected with an external system driving board. Wherein the GND terminal of the FPC10 is connected to the GND terminal of the driving IC9 because of the etching process of the PMOLED and in order to be able to effectively manufacture the FPC10, a conductive electrode made of an ITO material having the same height as the layer of the ITO anode is generally disposed under the FPC10, and the second shielding layer is connected to the GND terminal of the FPC 10.

There are two ways of grounding the second shielding layer, in one implementation, a via hole is formed in the glass substrate 1, a wire is threaded through the via hole, one end of the wire is connected to the GND end of the FPC10 (only needed to be connected to a conductive electrode made of the ITO material below the GND end of the FPC 10), and the other end of the wire 11 is connected to the second shielding layer.

In another embodiment, a wire is buried on the glass substrate 1 by a silicon perforation process, one end of the wire is connected to the GND terminal of the FPC10 (only need to be connected to the conductive electrode made of the ITO material below the GND terminal of the FPC 10), and the other end of the wire is connected to the second shielding layer.

The encapsulation cover 5 is made of glass, the encapsulation cover 5 is arranged on the outer side of the metal cathode 4 in a covering mode, and the edge of the encapsulation cover 5 is fixed on the back face of the glass substrate 1 in an adhesive mode. In order to prevent external water vapor from gathering in the packaging cover 5, a drying sheet 11 can be attached to the inner side surface of the packaging cover 5, a gap is reserved between the packaging cover 5 and the metal cathode 4, the packaging cover 5 is adhered to the glass substrate 1 through packaging adhesive, part of water vapor still enters into the gap between the packaging cover 5 and the metal cathode 4, and the drying sheet 11 can adsorb the water vapor entering into the gap.

The above embodiments are only for illustrating the technical concept and features of the present utility model, and are intended to enable those skilled in the art to understand the present utility model and to implement the same, but are not intended to limit the scope of the present utility model, and all equivalent changes or modifications made according to the spirit of the present utility model should be included in the scope of the present utility model.

Claims

1. The utility model provides an OLED display module assembly, includes glass substrate (1), has deposited ITO positive pole (2), organic luminescent layer (3) and metal negative pole (4) in proper order from bottom to top at the back of glass substrate (1), establishes in the cover of metal negative pole (4) outside and is fixed with encapsulation lid (5), the positive subsides of glass substrate (1) are equipped with polaroid (6), its characterized in that film encapsulation layer (7) have been laid in the surface outside of metal negative pole the surface coating of film encapsulation layer (7) has film layer (8) that blocks water, encapsulation lid (5) cover are established the skin of film layer (8) that blocks water.

2. The OLED display module according to claim 1, wherein a gap is left between the surface of the encapsulation cover (5) and the surface of the water-blocking film layer (8), and a drying device (11) for adsorbing internal moisture is attached to the inner side of the encapsulation cover (5).

3. The OLED display module according to claim 2, wherein the drying device (11) is attached to the middle or both sides of the inner sidewall of the encapsulation cover (5).

4. An OLED display module according to claim 2 or 3, characterized in that the drying means (11) is a solid desiccant tablet or a liquid desiccant.

5. The OLED display module according to claim 1, characterized in that a driving IC (9) is further provided on the glass substrate (1), and the driving IC (9) is electrically connected to the ITO anode (2) or the metal cathode (4) for controlling the operation of the display module.

6. The OLED display module according to claim 5, wherein an FPC (10) is further provided on the glass substrate (1), and one side of the FPC (10) is electrically connected to the driving IC (9) and the other side is electrically connected to an external system driving board.

7. The OLED display module according to claim 1, wherein the encapsulation cover (5) is made of glass, and the edge of the encapsulation cover (5) is fixed on the back surface of the glass substrate (1) by encapsulation glue.

8. The OLED display module according to claim 1, wherein the thin film encapsulation layer (7) is a transparent layer made of an inorganic material.

9. The OLED display module according to claim 1, characterized in that the water-blocking film layer (8) is made of nano-waterproof material and completely covers the thin-film encapsulation layer (7).

10. A display screen comprising an OLED display module as claimed in any one of claims 1 to 9.