CN106653807B

CN106653807B - Surface-mounted OLED display unit device, display screen and manufacturing method thereof

Info

Publication number: CN106653807B
Application number: CN201611086288.4A
Authority: CN
Inventors: 齐鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-12-01
Filing date: 2016-12-01
Publication date: 2020-02-07
Anticipated expiration: 2036-12-01
Also published as: CN106653807A

Abstract

The invention discloses a surface-mounted OLED display unit device, a display screen and a manufacturing method thereof, and belongs to the field of OLED display. An OLED light-emitting material connected with the upper surface of the first electrode is arranged in a groove-shaped structure formed by the first edge layer and the insulating layer, and an electrode connecting layer connected with the second electrode through the surface of the insulating layer is arranged on the upper surface of the OLED light-emitting material. Compared with the prior art, the invention has the characteristics of simple driving, improved yield, simple repair, convenient operation, reduced use cost and prolonged service life of large-area OLED display.

Description

Surface-mounted OLED display unit device, display screen and manufacturing method thereof

Technical Field

The invention relates to the field of OLED display, in particular to a surface-mounted OLED display unit device, a display screen and a manufacturing method thereof.

Background

The OLED display is composed of a plurality of light-emitting pixels and a driving board for driving the light-emitting pixels to emit light, each pixel is an OLED display device, wherein the OLED display device can be a full-color display device formed by vertically overlapping three light-emitting OLED materials of red, green and blue (three primary colors), positive and negative electrodes corresponding to each light-emitting OLED material are arranged on the upper side and the lower side of each light-emitting OLED material, different voltages are applied to the positive and negative electrodes of the three light-emitting OLED materials, and after generated currents respectively flow through the three OLED light-emitting materials, the three light-emitting OLED materials can be enabled to emit red light, green light and blue light with different intensity values, so that the required color is displayed by overlapping of the three colors, as shown in FIG. 1; the OLED display device may also be a monochrome display device made of one kind of light emitting OLED material, and the principle of light emission of the monochrome display device is the same as that of a full-color display device.

Since the OLED display is a current type display device, the luminance control of the display device is determined by the current density passing through the device, and in the existing manufacturing process, positive and negative electrodes need to be arranged on the upper and lower sides of the OLED material, which requires a very complex driving circuit, which will result in a reduction in the yield of large-area driving of the backplane, and the process management in the EL manufacturing is also very difficult, which easily results in a further reduction in the yield of large-size display manufacturing, even the large-size display manufacturing cannot be applied. In addition, due to the process stability, the unique environmental sensitivity in the process of the OLED display device and the unique service life problem of the OLED display device, even if a perfect display screen can be manufactured in the large-area OLED display, dead spots (not displayed), dark spots and short circuit spots still frequently occur after the OLED display device is used for a period of time.

Disclosure of Invention

The invention aims to solve the technical problem of providing a surface-mounted OLED display unit device, a display screen and a manufacturing method thereof.

In order to solve the technical problems, the invention provides the following technical scheme:

a patch type OLED display unit device comprises a first electrode and a second electrode which are arranged in parallel, wherein an insulating layer is arranged between the first electrode and the second electrode, and the edges of the first electrode and the second electrode are respectively provided with a first edge layer and a second edge layer which form a groove-shaped structure with the insulating layer;

an OLED light-emitting material connected with the upper surface of the first electrode is arranged in a groove-shaped structure formed by the first edge layer and the insulating layer, and an electrode connecting layer connected with the second electrode through the surface of the insulating layer is arranged on the upper surface of the OLED light-emitting material.

Furthermore, the upper surfaces of the electrode connecting layer, the first edge layer and the second edge layer are provided with packaging materials for packaging, and the packaging materials are inorganic packaging materials or organic packaging materials.

Further, the inorganic packaging material is a structural film layer formed by SiO2 or SiNx with the thickness of 10-3000nm, or a structural film layer formed by laminating SiO2 and SiNx;

the organic packaging material is a structural film layer formed by epoxy resin or acrylic resin with the thickness of 10-3000nm, or a structural film layer formed by a copolymer or a mixture of the epoxy resin and the acrylic resin.

Further, the first electrode comprises a first silver electrode and a first transparent conductive material deposited on the first silver electrode, the second electrode comprises a second silver electrode and a second transparent conductive material deposited on the second silver electrode, the thicknesses of the first silver electrode and the second silver electrode are both 1-500nm, and the thicknesses of the first transparent conductive material and the second transparent conductive material are both 1-500 nm;

the electrode connecting layer is made of transparent conductive materials.

Further, the insulating layer, the first edge layer and the second edge layer are all inorganic passivation layers or all organic passivation layers, wherein: the inorganic passivation layer is a structural film layer formed by SiO2 or SiNx or a structural film layer formed by laminating SiO2 and SiNx;

the organic passivation layer is a structural film layer formed by resin.

A display screen comprises a driving back plate and a plurality of patch type OLED display unit devices, wherein a back plate anode and a back plate cathode are arranged on the driving back plate, and a first electrode and a second electrode of each patch type OLED display unit device are respectively connected with the back plate anode and the back plate cathode through conductive adhesives.

Further, the back plate anode and the back plate cathode are respectively and correspondingly arranged below the first electrode and the second electrode;

or the backboard anode comprises a first anode and a second anode which are arranged below the two ends of the first electrode at intervals and are connected with the two ends of the first electrode, and the backboard cathode is arranged below the second electrode.

The manufacturing method of the surface mount OLED display unit device is characterized by comprising the following steps of:

step 1: forming a first electrode and a second electrode arranged in parallel on a substrate;

step 2: depositing a pixel defining layer covering the first and second electrodes on a substrate;

and step 3: stripping the pixel defining layer corresponding to the upper parts of the first electrode and the second electrode to expose the first electrode and the second electrode, so that the pixel defining layer forms an insulating layer arranged between the first electrode and the second electrode and a first edge layer and a second edge layer arranged at the edges of the first electrode and the second electrode, and the insulating layer and the first edge layer and the second edge layer form a groove-shaped structure with the first electrode and the second electrode as bottoms respectively;

and 4, step 4: forming an OLED light-emitting material connected with the upper surface of the first electrode in a groove-shaped structure formed by the first edge insulating layer and the insulating layer;

and 5: depositing an electrode connecting layer for connecting a cathode of the OLED light-emitting material with a second electrode on the upper surfaces of the OLED light-emitting material, the pixel defining layer and the second electrode;

step 6: arranging an encapsulation material on the surfaces of the electrode connecting layer and the pixel defining layer;

and 7: and cutting to form a plurality of patch type OLED display unit devices arranged on the substrate.

Further, the step 1 is further: forming a first electrode and a second electrode which are arranged in parallel on a substrate formed by alkali-free glass or a flexible substrate by adopting a wet process of a wet etching or printing mode;

the step 2 is further as follows:

depositing an inorganic passivation layer covering the first and second electrodes as the pixel defining layer on the substrate by using a CVD process;

or depositing an organic passivation layer covering the first electrode and the second electrode as the pixel defining layer on the substrate by adopting an ink-jet printing or coating process;

in the step 3, the stripping off the pixel defining layer corresponding to the upper portions of the first electrode and the second electrode to expose the first electrode and the second electrode further includes:

and stripping the pixel defining layers corresponding to the upper parts of the first electrode and the second electrode by adopting dry etching or direct exposure and development to expose the first electrode and the second electrode.

The step 4 is further as follows:

and forming an OLED light-emitting material connected with the upper surface of the first electrode in a groove-shaped structure formed by the first insulating layer and the insulating layer by adopting an evaporation method or a solution process method.

A display screen manufacturing method further realized by adopting the manufacturing method of the patch type OLED display unit device comprises the following steps after step 7:

and 8: and respectively connecting the first electrode and the second electrode of the patch type OLED display unit device with the anode and the cathode of the back plate of the driving back plate through conductive adhesives.

The invention has the following beneficial effects:

in the design of the invention, the cathode of the OLED luminescent material is connected with the second electrode through the electrode connecting layer, so that the first electrode and the second electrode are positioned at the same side of the OLED display unit device, and thus, when the OLED display unit device is driven, only a driving backboard connected with the first electrode and the second electrode needs to be arranged on the bottom surface of the OLED display unit device.

The invention adopts unique electrode arrangement design, so that the OLED display unit device exists as an independent unit, and the design not only can realize different display purposes by screening the quality of the OLED display unit device and randomly combining the OLED display unit device, thereby effectively avoiding the yield problem in the traditional large-area OLED display manufacturing, but also can realize the detachable design of the OLED display unit device and the driving back plate, thereby being convenient and effective to replace the bad light-emitting unit, not only having simple repair and convenient operation, but also greatly reducing the use cost and prolonging the service life of the large-area OLED display. In addition, due to the structural characteristics of the OLED display unit, the process management difficulty in the manufacturing of the OLED display unit device is greatly reduced, and the yield of large-area OLED display is further improved.

Compared with the prior art, the OLED display panel has the characteristics of simple driving, high yield, simple repair, convenience in operation, reduction in use cost and prolongation of the service life of large-area OLED display.

Drawings

FIG. 1 is a schematic diagram of a prior art OLED display device;

fig. 2 is a schematic structural diagram of a patch type OLED display unit device according to the present invention;

FIG. 3 is a schematic structural diagram of an embodiment of a display screen according to the present invention;

FIG. 4 is a schematic structural diagram of another embodiment of a display screen according to the present invention;

FIG. 5 is a schematic flow chart of a method for manufacturing a surface mount OLED display unit device according to the present invention;

fig. 6 is a schematic structural diagram of step 1 of the method for manufacturing a patch type OLED display unit device according to the present invention;

fig. 7 is a schematic structural diagram of step 2 of the method for manufacturing a patch type OLED display unit device according to the present invention;

fig. 8 is a schematic structural diagram of step 3 of the method for manufacturing a patch type OLED display unit device according to the present invention;

fig. 9 is a schematic structural diagram of step 4 of the method for manufacturing a patch type OLED display unit device according to the present invention;

fig. 10 is a schematic structural diagram of step 5 of the method for manufacturing a patch type OLED display unit device according to the present invention;

fig. 11 is a schematic structural diagram of step 6 of the method for manufacturing a patch type OLED display unit device according to the present invention;

fig. 12 is a schematic structural diagram of step 7 of the method for manufacturing a patch type OLED display unit device according to the present invention;

fig. 13 is a schematic structural diagram of substrate peeling in the method for manufacturing the patch type OLED display unit device of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

In one aspect, the present invention provides a surface mount OLED display unit device, as shown in fig. 2, including a first electrode 11 and a second electrode 12 arranged in parallel, an insulating layer 13 is arranged between the first electrode 11 and the second electrode 12, and a first edge layer 14 and a second edge layer 15, which form a groove-shaped structure with the insulating layer 13, are respectively arranged at edges of the first electrode 11 and the second electrode 12;

the first edge layer 14 and the insulating layer 13 are arranged in a groove structure, and an OLED light emitting material 16 connected to the upper surface of the first electrode 11 is arranged on the groove structure, and an electrode connecting layer 17 connected to the second electrode 12 through the surface of the insulating layer 13 is arranged on the upper surface of the OLED light emitting material 16.

In the design of the invention, the cathode of the OLED luminescent material 16 is connected with the second electrode 12 through the electrode connecting layer 17, so that the first electrode 11 and the second electrode 12 are positioned at the same side of the OLED display unit device, and thus, when the OLED display unit device is driven, only the driving backboard 2 connected with the first electrode 11 and the second electrode 12 needs to be arranged on the bottom surface of the OLED display unit device.

The invention adopts unique electrode arrangement design, so that the OLED display unit device exists as an independent unit, and the design not only can realize different display purposes by screening the quality of the OLED display unit device and randomly combining the OLED display unit device, thereby effectively avoiding the yield problem in the traditional large-area OLED display manufacturing, but also can realize the detachable design of the OLED display unit device and the driving back plate 2, thereby conveniently and effectively replacing the bad light-emitting unit, not only the repair is simple, but also the operation is convenient, and the repairable design of the invention can greatly reduce the use cost and prolong the service life of the large-area OLED display. In addition, due to the structural characteristics of the OLED display unit, the process management difficulty in the manufacturing of the OLED display unit device is greatly reduced, and the yield of large-area OLED display is further improved.

Since the film layer of the EL material of the OLED display unit device is very thin and is easily corroded and damaged by external water and oxygen, after the device is manufactured, an encapsulation protective layer needs to be manufactured outside the OLED display unit device to complete the manufacturing of the whole device. Specifically, the upper surfaces of the electrode connection layer 17, the first edge layer 14, and the second edge layer 15 are covered with an encapsulation material 18 for encapsulation, and the encapsulation material 18 is an inorganic encapsulation material or an organic encapsulation material.

As an improvement of the invention, if the inorganic packaging material is covered, a structural film layer formed by SiO2 or SiNx with the thickness of 10-3000nm or a structural film layer formed by laminating SiO2 and SiNx can be adopted; if the organic packaging material is covered, a structural film layer formed by epoxy resin or acrylic resin with the thickness of 10-3000nm or a structural film layer formed by a copolymer or a mixture of the epoxy resin and the acrylic resin can be adopted.

As another improvement of the present invention, the first electrode 11 includes a first metal electrode and a first transparent conductive material deposited on the first metal electrode, the second electrode 12 includes a second metal electrode and a second transparent conductive material deposited on the second metal electrode, the thicknesses of the first metal electrode and the second metal electrode are both 1-500nm, and the thicknesses of the first transparent conductive material and the second transparent conductive material are both 1-500 nm;

in the present invention, the materials of the first electrode 11 and the second electrode 12 may be selected according to the actual display requirements, for example, when the OLED display unit device is required to display upwards, the first electrode 11 selects a metal electrode with high reflectivity, such as a silver electrode, and then a first transparent conductive material is further deposited on the silver electrode as the first metal electrode, and for the second electrode 12, preferably, a metal electrode with reflectivity of more than 90% may be selected as a second metal electrode, such as common metals, such as aluminum, molybdenum, or copper, where the silver material is the most preferred, and then a second transparent conductive material is further deposited on the silver electrode, where the second transparent conductive material may be a transparent conductive oxide material, a conductive silver nano-material, or a transparent material, such as graphene, where the transparent conductive metal oxide is the most preferred. The thicknesses of the metal electrode and the transparent conductive material are needed for optical adjustment, preferably, the thicknesses of the first metal electrode and the second metal electrode can be both 50-100nm, and the thicknesses of the first transparent conductive material and the second transparent conductive material can be both 50-100 nm.

The electrode connecting layer 17 is made of a transparent conductive material, and preferably, the electrode connecting layer 17 has a transparent microcavity structure made of an inorganic conductive oxide material.

As a further development of the invention, the insulating layer 13, the first edge layer 14 and the second edge layer 15 are all inorganic passivation layers or all organic passivation layers, wherein: the inorganic passivation layer can be a structural film layer formed by SiO2 or SiNx, or a structural film layer formed by laminating SiO2 and SiNx, and the organic passivation layer can be a structural film layer formed by resin;

in the manufacturing process, a pixel defining layer covering the first electrode 11 and the second electrode 12 is firstly deposited on the first electrode 11 and the second electrode 12, and then the pixel defining layer corresponding to the upper parts of the first electrode 11 and the second electrode 12 is stripped by adopting the processes of dry etching, direct exposure, development and the like, so that the first electrode 11 and the second electrode 12 are exposed. So that the pixel defining layer forms an insulating layer 13 disposed between the first electrode 11 and the second electrode 12, and a first edge layer 14 and a second edge layer 15 disposed at edges of the first electrode 11 and the second electrode 12 and constituting a channel structure with the insulating layer 13. The insulating layer 13, the first edge layer 14 and the second edge layer 15 may be inorganic passivation layers or organic passivation layers, and the thickness may be 100-300nm, wherein the inorganic passivation layers may be structural film layers formed by SiO2 or SiNx, or structural film layers formed by stacking SiO2 and SiNx; the organic passivation layer material can be colorless, colored or black photosensitive resin, a structural film layer is formed by adopting a rotary coating or printing mode and the like, the concentration is adjusted to be suitable for different film forming modes, for example, JEM-549 resin is adopted, ink is diluted by 10 percent of solid content and then is prepared on inorganic flexible PVX by adopting ink jet printing or other coating processes, the film thickness is controlled to be 500-3000nm after drying, and the preferable film thickness is 1000-2000nm after drying.

On the other hand, the present invention provides a display screen, as shown in fig. 3, including a driving backplane 2 and a plurality of the above-mentioned surface-mounted OLED display unit devices, where the driving backplane 2 is provided with a backplane anode 21 and a backplane cathode 22, and both the first electrode 11 and the second electrode 12 of the surface-mounted OLED display unit devices are connected to the backplane anode 21 and the backplane cathode 22 through conductive adhesives 23, respectively.

The driving back plate 2 of the present invention may be a flexible back plate, a curved back plate or a planar back plate. The matching structure of the surface-mounted OLED display unit device and the driving back plate 2 is simple, and the light emitting color can be freely regulated and controlled by the output current of the driving back plate 2. Moreover, the surface-mounted OLED display unit device adopted in the invention is the surface-mounted OLED display unit device, so compared with the prior art, the surface-mounted OLED display unit device has the characteristics of simple driving, improved yield, simple repair, convenient operation, reduced use cost and prolonged service life of large-area OLED display.

When the display screen is a single-sided display, the back plate anode 21 and the back plate cathode 22 are respectively and correspondingly arranged below the first electrode 11 and the second electrode 12, as shown in fig. 3.

When the display screen is a double-sided display, as shown in fig. 4, the back plate anode 21 includes a first anode 211 and a second anode 212 that are disposed at an interval below two ends of the first electrode 11 and are both connected to two ends of the first electrode 11, and the back plate cathode 22 is disposed below the second electrode 12. In the design, an interval equal to or close to the length of the OLED light-emitting material 16 can be arranged between the first anode 211 and the second anode 212, so that the back plate anode 21 does not generate light obstruction to the OLED light-emitting material 16, and light emitted by the OLED display unit device can be directly emitted from the front surface and the back surface, thereby realizing double-sided display. In addition, the invention can realize double-sided display by carefully limiting the coating range of the conductive adhesive 23 and designing the driving substrate.

In another aspect, the present invention further provides a method for manufacturing the surface mount OLED display unit device, as shown in fig. 5, including:

step 1: forming a first electrode 11 and a second electrode 12 arranged in parallel on a substrate, as shown in fig. 6;

step 2: depositing a pixel defining layer covering the first electrode 11 and the second electrode 12 on a substrate, as shown in fig. 7;

and step 3: stripping off the pixel defining layer corresponding to the upper parts of the first electrode 11 and the second electrode 12 to expose the first electrode 11 and the second electrode 12, so that the pixel defining layer forms an insulating layer 13 arranged between the first electrode 11 and the second electrode 12 and a first edge layer 14 and a second edge layer 15 arranged at the edges of the first electrode 11 and the second electrode 12, and the insulating layer 13 and the first edge layer 14 and the second edge layer 15 form a groove-shaped structure with the first electrode 11 and the second electrode 12 as the bottom respectively, as shown in fig. 8;

and 4, step 4: forming an OLED light emitting material 16 connected to the upper surface of the first electrode 11 in a trench structure of the first insulating layer 14 and the insulating layer 13, as shown in fig. 9;

and 5: depositing an electrode connection layer 17 for connecting the cathode of the OLED light emitting material 16 with the second electrode 12 on the upper surfaces of the OLED light emitting material 16, the pixel defining layer and the second electrode 12, as shown in fig. 10;

step 6: disposing an encapsulating material 18 on the surfaces of the electrode connection layer 17 and the pixel defining layer, as shown in fig. 11;

and 7: cutting to form a plurality of patch type OLED display unit devices arranged on the substrate, as shown in FIG. 12.

In the manufacturing method of the invention, the cathode of the OLED luminescent material 16 is connected with the second electrode 12 through the electrode connecting layer 17, so that the first electrode 11 and the second electrode 12 are positioned at the same side of the OLED display unit device, and thus, when the OLED display unit device is driven, only the driving backboard 2 connected with the first electrode 11 and the second electrode 12 needs to be arranged at the bottom surface of the OLED display unit device.

The invention adopts a unique electrode arrangement design method, so that the OLED display unit device is cut to be an independent unit, the design can be used after the quality of the OLED display unit device is screened, the display quality is ensured, different display purposes are realized through any combination of the devices, the yield problem in the traditional large-area OLED display manufacturing is effectively avoided, the detachable design of the OLED display unit device and the driving back plate 2 can be realized, the defective light-emitting unit can be conveniently and effectively replaced, the repair is simple and the operation is convenient, the repairable design of the invention can greatly reduce the use cost, and the service life of the large-area OLED display is prolonged. In addition, due to the structural characteristics of the OLED display unit, the process management difficulty in the manufacturing of the OLED display unit device is greatly reduced, and the yield of large-area OLED display is further improved.

As an improvement of the present invention, step 1 further comprises: forming a first electrode 11 and a second electrode 12 which are arranged in parallel on a substrate formed by alkali-free glass or a flexible substrate by adopting wet etching or a wet process of a printing mode, wherein the wet etching can be one-step wet etching or distributed wet etching;

the step 2 is further as follows:

depositing an inorganic passivation layer covering the first electrode 11 and the second electrode 12 as the pixel defining layer on the substrate using a CVD process;

alternatively, an organic passivation layer covering the first and

second electrodes

11 and 12 is deposited as the pixel defining layer on the substrate using an inkjet printing or coating process.

As a further improvement of the present invention, in step 3, the pixel defining layer corresponding to the upper portions of the first electrode 11 and the second electrode 12 is stripped, and the exposing of the first electrode 11 and the second electrode 12 further comprises:

and stripping the pixel defining layers corresponding to the upper parts of the first electrode 11 and the second electrode 12 by adopting dry etching or direct exposure and development to expose the first electrode 11 and the second electrode 12.

In the invention, the step 4 is further as follows:

in the groove structure formed by the first insulating layer 14 and the insulating layer 13, the OLED light emitting material 16 connected to the upper surface of the first electrode 11 is formed by evaporation or solution process.

In the invention, the OLED luminescent material 16 is prepared in a mask mode by adopting a slice mode, and the OLED luminescent material 16 can be prepared in a full-color evaporation mode or a monochrome evaporation mode according to the requirement, so that the mask precision requirement is not high, and the yield can be well improved. The white light device can be in a unit structure or a series structure. The solution process can be accomplished by ink jet printing, nozle printing or mask jet printing.

In step 5, the electrode connection layer 17 is a micro-cavity structure of a semitransparent cathode made of an inorganic conductive oxide material. The inorganic conductive oxide material can be ITO or IZO, and the manufacturing method can be a full-color RGB light emitting method or a monochromatic WOLED method.

In another aspect, the present invention further provides a method for manufacturing a display screen, which is further implemented by using the method for manufacturing a patch type OLED display unit device, where after step 7, the method includes:

and 8: the first electrode 11 and the second electrode 12 of the patch type OLED display unit device are respectively connected with the back plate anode 21 and the back plate cathode 22 of the driving back plate 2 through the conductive adhesive 23, as shown in fig. 3.

In the invention, because the OLED display unit device is arranged on the driving backboard 2 in a patch mode, monochrome display or full-color display can be simply realized, wherein the full-color display can also realize monochrome display by applying a monochrome power supply mode. Because the OLED display unit device has the characteristic of convenient replacement, compared with the prior art, the OLED display unit device is not limited by the area in the large-area OLED manufacturing process, and the defect control of the display is improved.

The size of the OLED display unit device can be 0201, 0402, 0603, 0805, 1206 or 1210, the OLED display unit device can be attached to the driving back plate 2 by a chip mounter which can be used after the OLED display unit device is cut on the substrate, the chip mounter can be a commercially available common machine type, the chip mounting work is simple and reliable, the display modes can be combined at will, and when some light-emitting units have questions in use, the OLED display screen can be replaced.

In the present invention, the support stripping, i.e. the substrate stripping, may be performed on the manufactured OLED display unit device during the substrate yellow light process or EL process, as shown in fig. 13. The stripping process can be carried out before or after the OLED display unit device is cut, and the stripping method can adopt physical stripping or short-time solution dipping stripping to finally obtain the surface-mounted OLED display unit device.

The working principle of the OLED display unit device is that voltage is applied to the back plate anode 21 and the back plate cathode 22 which drive the back plate 2, then direct current is generated on the first electrode 11 and the second electrode 12, the OLED luminescent material 16 generates different luminescent brightness due to different currents flowing through, and simultaneously the OLED luminescent material 16 can also generate different luminescent colors.

The OLED luminescent material has self-luminous excellent display quality, and has two application modes of active driving and passive display, but no matter which display mode is adopted, the manufacturing process in the prior art adopts the traditional semiconductor process to form an OLED luminescent unit device on a large-substrate glass or plastic substrate, and due to the process stability and the unique environmental sensitivity in the OLED device process, the yield and the defects of the display device can not be avoided, and the manufacturing and the cost of large-size display products are influenced. Meanwhile, even if a perfect display screen can be manufactured, the service life of the OLED light-emitting material 16 is very long, and individual defects occasionally appearing after a period of use can only be replaced by a new screen due to the fact that the defects cannot be repaired, which is very expensive.

In order to solve the problems that the manufacturing yield of a large-area OLED display screen is low and the large-area OLED display screen is not easy to be applied to large-area display, the invention designs an OLED display unit device through a unique electrode structure and adopts a patch mode to be attached to a driving substrate to finish the display. The electrode routing design in the invention realizes that the first electrode 11 and the second electrode 12 are positioned at the same side of the OLED display unit device, and then the welding of the OLED display unit device and the driving substrate is realized through the conductive adhesive 23 or the conductive slurry, so that the process is simple and reliable, the quality screening of the OLED display unit device can be effectively realized through the operation mode, different display purposes can be realized through any combination, the yield problem in the traditional large-area display manufacturing is avoided, meanwhile, the defective light-emitting unit can be simply replaced through fusion welding and re-welding, and the repair is simple and convenient to operate. The service life of the large-area OLED display can be prolonged. Is especially suitable for OLED advertisement and outdoor display application.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A surface-mounted OLED display unit device is characterized by comprising a first electrode and a second electrode which are arranged in parallel, wherein an insulating layer is arranged between the first electrode and the second electrode, and the edges of the first electrode and the second electrode are respectively provided with a first edge layer and a second edge layer which form a groove-shaped structure with the insulating layer;

an OLED light-emitting material connected with the upper surface of the first electrode is arranged in a groove-shaped structure formed by the first edge insulating layer and the insulating layer, and an electrode connecting layer connected with the second electrode through the surface of the insulating layer is arranged on the upper surface of the OLED light-emitting material;

and the upper surfaces of the electrode connecting layer, the first edge layer and the second edge layer are provided with packaging materials for packaging, and the packaging materials are inorganic packaging materials or organic packaging materials.

2. The patch type OLED display unit device as claimed in claim 1, wherein the inorganic packaging material is a structural film layer formed by SiO2 or SiNx with a thickness of 10-3000nm, or a structural film layer formed by laminating SiO2 and SiNx;

3. The SMD OLED display unit device according to claim 1, wherein the first electrode comprises a first silver electrode and a first transparent conductive material deposited on the first silver electrode, the second electrode comprises a second silver electrode and a second transparent conductive material deposited on the second silver electrode, the first silver electrode and the second silver electrode are both 1-500nm thick, and the first transparent conductive material and the second transparent conductive material are both 1-500nm thick;

the electrode connecting layer is made of transparent conductive materials.

4. The SMD OLED display unit device of claim 1, wherein the insulating layer, the first edge layer and the second edge layer are all inorganic passivation layers or all organic passivation layers, wherein: the inorganic passivation layer is a structural film layer formed by SiO2 or SiNx or a structural film layer formed by laminating SiO2 and SiNx;

the organic passivation layer is a structural film layer formed by resin.

5. A display screen is characterized by comprising a driving backboard and a plurality of patch type OLED display unit devices as claimed in any one of claims 1 to 4, wherein the driving backboard is provided with a backboard anode and a backboard cathode, and a first electrode and a second electrode of each patch type OLED display unit device are respectively connected with the backboard anode and the backboard cathode through conductive adhesives.

6. The display screen of claim 5, wherein the backplane anode and the backplane cathode are disposed under the first electrode and the second electrode, respectively;

7. A method for manufacturing the patch type OLED display unit device as claimed in any one of claims 1-4, comprising:

8. The method of manufacturing according to claim 7, wherein the step 1 further comprises: forming a first electrode and a second electrode which are arranged in parallel on a substrate formed by alkali-free glass or a flexible substrate by adopting a wet process of a wet etching or printing mode;

the step 2 is further as follows:

stripping the pixel defining layers corresponding to the upper parts of the first electrode and the second electrode by adopting dry etching or direct exposure and development to expose the first electrode and the second electrode;

the step 4 is further as follows:

9. A display screen manufacturing method further implemented by the manufacturing method of the patch type OLED display unit device according to claim 7, wherein after the step 7, the method includes: