CN104009058A - Display module and manufacturing method thereof - Google Patents

Abstract

The invention discloses a display module and a manufacturing method thereof. The display module comprises a transparent cover plate, a first protective film and an organic light-emitting display element. The organic light emitting display element is arranged between the transparent cover plate and the first protective film. The area of the organic light emitting display element is smaller than the area of the transparent cover plate and the area of the first protective film.

Description

Display module and manufacturing method thereof

technical field

The present invention relates to a display module and its manufacturing method, and in particular to an organic light-emitting display module and its manufacturing method.

Background technique

Organic light-emitting display modules have great advantages because of their high color saturation, thin thickness, self-illumination, no viewing angle dependence, power saving, simple manufacturing process, low cost, low temperature operating range, high response speed and full color. Application potential, has been widely used in various electronic products. In recent years, the technology of digital information and wireless mobile communication has developed rapidly. In order to achieve the purpose of portability, compact size and user-friendly operation, many electronic information products, such as digital products such as mobile phones (Mobile Phone) and personal digital assistants (Personal Digital Assistant, PDA), have higher requirements for display modules. come higher. Therefore, organic light-emitting display modules have become more and more commonly used display modules in such electronic products.

Since the organic materials in the OLED module have poor tolerance to water vapor and oxygen, the OLED module is still mainly fabricated on a glass substrate. However, in order to maintain a sufficient barrier to moisture and oxygen and reduce assembly difficulty, it is difficult to reduce the thickness and weight of the glass substrate. Moreover, when the organic light-emitting display module using the glass substrate is attached to the glass cover plate of the electronic device, it is easy to be broken.

Contents of the invention

The purpose of the present invention is to provide a display module, which can solve the problem that the traditional organic light-emitting display module is too thick.

Another object of the present invention is to provide a method for manufacturing a display module, which can solve the problem of poor yield.

To achieve the above purpose, the display module of the present invention includes a transparent cover plate, a first protective film and an organic light emitting display element. The organic light emitting display element is arranged between the transparent cover plate and the first protection film. The area of the organic light emitting display element is smaller than the area of the transparent cover plate and the area of the first protective film.

In an embodiment of the present invention, the display module further includes a sealant, which surrounds the organic light emitting display element and fills between the transparent cover plate and the first protective film.

In an embodiment of the present invention, an organic light emitting display device includes a flexible substrate, an organic light emitting display unit and an isolation layer. The organic light emitting display unit is configured on the flexible substrate, and the distribution area of the organic light emitting display unit is smaller than that of the flexible substrate. The isolation layer is configured on the flexible substrate and completely covers the organic light emitting display unit.

In an embodiment of the present invention, the isolation layer is a single inorganic material layer or a plurality of inorganic material layers and a plurality of organic material layers stacked alternately.

In an embodiment of the present invention, the organic light emitting display device further includes a circular polarization layer disposed on the insulating layer, and the area of the circular polarization layer is smaller than that of the flexible substrate. In addition, the display module may further include a sealant, which surrounds the organic light emitting display element and fills between the transparent cover, the first protective film and the circular polarizing layer.

In an embodiment of the present invention, the display module further includes a second protective film disposed between the flexible substrate and the first protective film, the area of the second protective film is the same as that of the flexible substrate, and the second protective film The area of the film is smaller than that of the first protective film. In addition, the display module may further include a sealant, which surrounds the organic light emitting display element and fills between the transparent cover plate and the first protective film.

In an embodiment of the present invention, the first protective film is a metal foil or a metal foil with a plastic substrate.

The manufacturing method of the display module of the present invention includes the following steps. An organic light-emitting display element is pasted on a transparent cover plate. A first protective film is pasted on the organic light emitting display element. The organic light emitting display element is located between the transparent cover plate and the first protection film. The area of the organic light emitting display element is smaller than the area of the transparent cover plate and the area of the first protective film.

In an embodiment of the present invention, a method for manufacturing an organic light emitting display device includes the following steps. An organic light-emitting display unit is formed on a flexible substrate. The distribution area of the organic light emitting display unit is smaller than that of the flexible substrate. An insulating layer is formed on the flexible substrate. The insulating layer completely covers the organic light emitting display unit.

In one embodiment of the invention, the step of forming the isolation layer is to form a single inorganic material layer.

In an embodiment of the present invention, the step of forming the isolation layer is to form a plurality of inorganic material layers and a plurality of organic material layers stacked alternately.

In an embodiment of the present invention, before attaching the organic light-emitting display element on the transparent cover plate, it further includes disposing a circular polarizing layer on the insulating layer. The area of the circular polarizing layer is smaller than that of the flexible substrate.

In an embodiment of the present invention, after attaching the first protective film on the organic light emitting display element, attaching a second protective film on the organic light emitting display element is further included. The first protective film is pasted on the second protective film. The second protection film is located between the flexible substrate and the first protection film. The area of the second protective film is the same as that of the flexible substrate, and the area of the second protective film is smaller than that of the first protective film.

In one embodiment of the present invention, after attaching the first protective film on the organic light-emitting display element, it further includes filling a sealant between the transparent cover plate and the first protective film, wherein the sealant does not surround the organic light-emitting display element. Display components.

Based on the above, in the display module and its manufacturing method of the present invention, the two sides of the organic light emitting display element are respectively isolated from moisture and oxygen by the cover plate and the protective film, the thickness and weight of the organic light emitting display element can be reduced, and the manufacturing process is good. rate can be increased.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail together with the accompanying drawings.

Description of drawings

1 is a schematic cross-sectional view of a handheld electronic device according to an embodiment of the present invention;

2 to 5 are schematic cross-sectional views of display modules in four other embodiments of the present invention;

FIG. 6A is a text flow chart of a manufacturing method of a display module according to an embodiment of the present invention;

FIG. 6B is an adjusted flow chart of the manufacturing method of the display module shown in FIG. 6A .

Symbol Description

50: Handheld Electronic Devices

52: Ontology

52A: Display opening

54: Host system

100, 200, 300, 400, 500: display module

110: transparent cover

120: First protective film

130, 230, 330: organic light-emitting display elements

232: Flexible substrate

234: Organic Light Emitting Display Unit

234A: Active element array

234B: organic light-emitting material layer

236, 336: insulation layer

236A: Inorganic material layer

236B: Organic material layer

238: circular polarizing layer

240: Adhesive layer

350, 450: sealant

460, 560: Second protective film

S110, S120, S122, S124, S130, S140, S150: steps

Detailed ways

FIG. 1 is a schematic cross-sectional view of a handheld electronic device according to an embodiment of the present invention, wherein the size ratio of each component has been adjusted for clarity. Please refer to FIG. 1 , the handheld electronic device 50 of this embodiment includes a main body 52 , a host system 54 and a display module 100 . The body 52 has a display opening 52A. The host system 54 is disposed in the main body 52 . The display module 100 is disposed on the display opening 52A. The display module 100 includes a transparent cover 110 , a first protective film 120 and an organic light emitting display element 130 . The organic light emitting display element 130 is disposed between the transparent cover 110 and the first protection film 120 , and is electrically connected to the host system 54 . The organic light emitting display device 130 is electrically connected to the host system 54 through a flexible circuit board or other components, for example.

Both the transparent cover plate 110 and the first protective film 120 have good insulation properties against water vapor and oxygen, and thus can protect the organic light emitting display element 130 from water vapor or oxygen. In addition, the area of the organic light emitting display element 130 is smaller than the area of the transparent cover 110 and the area of the first protective film 120 . Therefore, the possibility of the organic light emitting display element 130 being damaged by moisture or oxygen is further reduced, and the service life of the organic light emitting display element 130 is prolonged.

The material of the transparent cover 110 in this embodiment may be glass or other materials, and touch sensing elements may also be selectively formed on the transparent cover 110 . The first protective film 120 can be a metal foil or a metal foil with a plastic substrate, wherein the metal foil is, for example, aluminum foil or silver foil. Dense metal and glass are good barriers to moisture and oxygen. Moreover, using the metal foil as the first protective film 120 can also reflect all the light provided by the organic light emitting display element 130 toward the first protective film 120 , thereby improving the utilization rate of light. The thickness of the first protection film 120 may be between 50 microns and 200 microns, for example, 100 microns. The thickness of the first protective film 120 is based on the principle of facilitating the attaching process.

Other embodiments are listed below for illustration. It must be noted here that the following embodiments use the component numbers and part of the content of the previous embodiments, wherein the same numbers are used to denote the same or similar components, and descriptions of the same technical content are omitted. In principle, different features of each embodiment can be applied to other embodiments. For the description of omitted parts, reference may be made to the foregoing embodiments, and the following embodiments will not be repeated.

FIG. 2 is a schematic cross-sectional view of a display module according to another embodiment of the present invention. Referring to FIG. 2 , the display module 200 of this embodiment is similar and can be used in the handheld electronic device 50 instead of the display module 100 of FIG. 1 , but the size ratio of each component is adjusted for clarity. The organic light emitting display device 230 of this embodiment includes a flexible substrate 232 , an organic light emitting display unit 234 and an isolation layer 236 . The organic light emitting display unit 234 is disposed on the flexible substrate 232 , and the distribution area of the organic light emitting display unit 234 is smaller than that of the flexible substrate 232 . In other words, the organic light emitting display unit 234 is not distributed on the entire surface of the flexible substrate 232 , and the peripheral area of the flexible substrate 232 is empty. The isolation layer 236 is disposed on the flexible substrate 232 and completely covers the organic light emitting display unit 234 . That is, the isolation layer 236 covers the upper surface and the side surface of the organic light emitting display unit 234 . The material of the flexible substrate 232 can be polyimide or other suitable materials. The organic light emitting display unit 234 is composed of, for example, an active device array 234A and an organic light emitting material layer 234B formed on the active device array 234A. The detailed structure of the organic light emitting display unit 234 is the same as that of common organic light emitting display units, and will not be repeated here.

The isolation layer 236 in this embodiment includes a plurality of inorganic material layers 236A and a plurality of organic material layers 236B stacked alternately, for example, 15 layers each. The material of the inorganic material layer 236A is, for example, silicon nitride, silicon oxide or other suitable materials, and the inorganic material layer 236A has good barrier properties to moisture and oxygen. The organic material layer 236B has better flexibility, which is beneficial to reduce the chance of cracks generated when the inorganic material layer 236A is bent. The organic light emitting display device 230 of this embodiment further includes a circular polarization layer 238 disposed on the isolation layer 236 . The area of the circular polarizing layer 238 is smaller than that of the flexible substrate 232 . The function of the circular polarizing layer 238 is that after the ambient light passes through the circular polarizing layer 238 from the transparent cover plate 110 and is reflected by the organic light-emitting display unit 234, it will not pass through the circular polarizing layer 238 again, thereby preventing the ambient light from interfering with the user viewing the organic light-emitting display. The screen displayed by component 230. In addition, an adhesive layer 240 is glued between the organic light emitting display element 230 and the transparent cover 110 , for example.

FIG. 3 is a schematic cross-sectional view of a display module according to another embodiment of the present invention. Referring to FIG. 3 , the display module 300 of this embodiment is similar to the display module 200 of FIG. 2 , and can be used in the handheld electronic device 50 instead of the display module 100 of FIG. 1 . The isolation layer 336 of the organic light emitting display device 330 of this embodiment is a single layer of inorganic material. The display module 300 further includes a sealant 350 surrounding the organic light emitting display element 330 and filling between the transparent cover 110 and the first protection film 120 . The sealant 350 can further isolate moisture and oxygen to prevent the organic light emitting display element 330 from being damaged.

FIG. 4 is a schematic cross-sectional view of a display module according to another embodiment of the present invention. Referring to FIG. 4 , the display module 400 of this embodiment is similar to the display module 300 of FIG. 3 , and can replace the display module 100 of FIG. 1 and be applied in the handheld electronic device 50 . The display module 400 of this embodiment further includes a second protection film 460 disposed between the flexible substrate 232 and the first protection film 120 . The area of the second protection film 460 is the same as that of the flexible substrate 232 , and the area of the second protection film 460 is smaller than that of the first protection film 120 .

FIG. 5 is a schematic cross-sectional view of a display module according to another embodiment of the present invention. Referring to FIG. 5 , the display module 500 of this embodiment is similar to the display module 400 of FIG. 4 , and can replace the display module 100 of FIG. 1 and be applied in the handheld electronic device 50 . The area of the second protection film 560 in this embodiment is larger than the area of the flexible substrate 232 .

FIG. 6A is a text flow chart of the manufacturing method of the display module according to an embodiment of the present invention, and FIG. 6B is an adjusted text flow chart of the manufacturing method of the display module of FIG. 6A . Please refer to FIG. 4 and FIG. 6A , the manufacturing method of the display module in this embodiment is to attach the organic light emitting display element 330 on the transparent cover plate 110 first, such as step S120 . Then, stick the first protection film 120 on the organic light emitting display element 330, as in step S140. The manufacturing method of the display module in this embodiment is completed on the same production line, which can reduce the possibility of the organic light emitting display element 330 being damaged during transportation to the next assembly place. At the same time, the display module can also adopt a thinner design, because the organic light emitting display element 330 is already protected by the transparent cover plate 110 and the first protective film 120 before leaving the production line.

Please refer to FIG. 4 and FIG. 6B , the manufacturing method of the display module in another embodiment is similar to FIG. 6A , and the differences are described here. Before the step S120, the circular polarizing layer 238 may be disposed on the isolation layer 336 of the organic light emitting display device 330, such as step S110. In addition, in the step S120, for example, the organic light emitting display unit 234 is firstly formed on the flexible substrate 232, as in the step S122. Next, an isolation layer 336 is formed on the flexible substrate 232, as in step S124. Wherein, the isolation layer 336 can also be replaced by the isolation layer 236 of FIG. 2 , so it is necessary to form a plurality of inorganic material layers 236A and a plurality of organic material layers 236B stacked alternately. Afterwards, attach the second protective film 460 on the flexible substrate 232 of the organic light emitting display element 330, as in step S130. In addition, in step S140 , the first protection film 120 is pasted on the second protection film 460 . Finally, fill the sealant 450 between the transparent cover 110 and the first protection film 120 , as in step S150 .

To sum up, in the display module and its manufacturing method of the present invention, the cover plate and the protective film are used to protect the organic light-emitting display element from moisture or oxygen, thereby improving the manufacturing process and the yield rate of the product. In addition, because the cover plate and the protective film strengthen the structural strength of the display module, the display module can be designed with a smaller thickness and reduce weight at the same time.

Although the present invention has been disclosed in conjunction with the above embodiments, it is not intended to limit the present invention. Those skilled in the art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims (16)

1. a display module, comprising:

Transparent cover plate;

The first diaphragm; And

Organic illuminated display element, is disposed between this transparent cover plate and this first diaphragm, and wherein the area of this organic illuminated display element is less than the area of this transparent cover plate and the area of this first diaphragm.

2. display module as claimed in claim 1, also comprises a fluid sealant, around this organic illuminated display element, is filled between this transparent cover plate and this first diaphragm.

3. display module as claimed in claim 1, wherein this organic illuminated display element comprises:

Flexible base plate;

Organic luminescence display unit, is disposed on this flexible base plate, and the distribution area of this organic luminescence display unit is less than the area of this flexible base plate; And

Isolation layer, is disposed on this flexible base plate and this organic luminescence display unit of complete covering.

4. display module as claimed in claim 3, wherein this isolation layer is single inorganic material layer or staggered stacked a plurality of inorganic material layers and a plurality of organic material layer.

5. display module as claimed in claim 3, wherein this organic illuminated display element also comprises a circular polarization layer, and it is disposed on this isolation layer, and the area of this circular polarization layer is less than the area of this flexible base plate.

6. display module as claimed in claim 5, also comprises a fluid sealant, around this organic illuminated display element, is filled between this transparent cover plate, this first diaphragm and this circular polarization layer.

7. display module as claimed in claim 3; also comprise the second diaphragm; be disposed between this flexible base plate and this first diaphragm, wherein the area of this second diaphragm is identical with the area of this flexible base plate, and the area of this second diaphragm is less than the area of this first diaphragm.

8. display module as claimed in claim 7, also comprises a fluid sealant, around this organic illuminated display element, is filled between this transparent cover plate and this first diaphragm.

9. display module as claimed in claim 1, wherein this first diaphragm is metal forming or the metal forming with plastic rubber substrate.

10. a manufacture method for display module, comprising:

Attach an organic illuminated display element on a transparent cover plate; And

Attach one first diaphragm on this organic illuminated display element; wherein this organic illuminated display element is between this transparent cover plate and this first diaphragm, and the area of this organic illuminated display element is less than the area of this transparent cover plate and the area of this first diaphragm.

The manufacture method of 11. display modules as claimed in claim 10, wherein the manufacture method of this organic illuminated display element comprises:

On a flexible base plate, form an organic luminescence display unit, the distribution area of this organic luminescence display unit is less than the area of this flexible base plate; And

Form an isolation layer on this flexible base plate, wherein this isolation layer this organic luminescence display unit of complete covering.

The manufacture method of 12. display modules as claimed in claim 11, the step that wherein forms this isolation layer is to form single inorganic material layer.

The manufacture method of 13. display modules as claimed in claim 11, the step that wherein forms this isolation layer is to form staggered stacked a plurality of inorganic material layers and a plurality of organic material layer.

The manufacture method of 14. display modules as claimed in claim 11, wherein, before this organic illuminated display element of attaching is on this transparent cover plate, also comprises that configuration one circular polarization layer is on this isolation layer, and the area of this circular polarization layer is less than the area of this flexible base plate.

The manufacture method of 15. display modules as claimed in claim 11; wherein after this first diaphragm of attaching is on this organic illuminated display element; also comprise and attach one second diaphragm on this organic illuminated display element; and this first diaphragm is to be attached on this second diaphragm; this second diaphragm is between this flexible base plate and this first diaphragm; the area of this second diaphragm is identical with the area of this flexible base plate, and the area of this second diaphragm is less than the area of this first diaphragm.

The manufacture method of 16. display modules as claimed in claim 10; wherein after this first diaphragm of attaching is on this organic illuminated display element; also comprise and fill a fluid sealant between this transparent cover plate and this first diaphragm, wherein sealing glue around this organic illuminated display element.