WO2021114435A1

WO2021114435A1 - Display device and method for manufacturing same

Info

Publication number: WO2021114435A1
Application number: PCT/CN2019/130439
Authority: WO
Inventors: 余朋飞; 龙冲; 宋涛
Original assignee: 武汉华星光电技术有限公司
Priority date: 2019-12-13
Filing date: 2019-12-31
Publication date: 2021-06-17
Also published as: CN111025752A

Abstract

A display device (100) and a method for manufacturing same. The display device (100) comprises: a display panel (10); a first polarizer (20); a second polarizer (30); and a backlight module (40). The display panel (10) comprises a light transmitting part (10A), a first opening (20A) is provided in the first polarizer (20), a second opening (30A) is provided in the second polarizer (30), a third opening (40A) is provided in the backlight module (40), and the first opening (20A), the second opening (30A), the third opening (40A) and the light transmitting part (10A) are correspondingly arranged. The display device (100) comprises first light shading glue (61) which surrounds the outer peripheral wall of the third opening (40A), the outer peripheral wall of the third opening (40A) being fixedly bonded to the first polarizer (20) by means of the first light shading glue (61).

Description

Display device and manufacturing method thereof

Technical field

The present application relates to the display field, and in particular to a display device and a manufacturing method thereof that can ensure the field of view of the camera while improving the aesthetic appearance of the display device.

Background technique

With the continuous advancement of display technology, full-screen technology with high screen-to-body ratio, larger effective display area, and more stunning display effects has gradually become the mainstream. In a known full-screen display panel, a round hole space is reserved when the film layer of the display panel is made, and then the film layer at the position of the round hole is dug to form a blind hole. When the color filter substrate and the array substrate are attached, liquid crystal is dropped into the blind hole to form a circular light-transmitting part to configure the front camera. However, in the actual coating process, problems such as lack of glue and overflow of glue will occur, which will cause the edge lines to be not smooth and affect the visual effect. In addition, the overflow of the light-shielding glue will reduce the field of view of the camera and affect the shooting quality of the front camera.

technical problem

In view of this, it is necessary to provide a display device manufacturing method that can ensure the field of view of the camera, improve the shooting quality, and at the same time improve the aesthetic appearance of the display device.

Technical solutions

This application provides a display device, including:

Display panel

The first polarizer is arranged on the first surface of the display panel;

The second polarizer is disposed on the second surface of the display panel away from the first polarizer;

The backlight module is arranged on the side of the first polarizer away from the display panel;

Wherein, the display panel includes a light-transmitting portion for allowing light to enter the photosensitive element, a first opening is opened in the first polarizer, and a second opening is opened in the second polarizer , A third opening is opened in the backlight module, and the first opening, the second opening, the third opening, and the light-transmitting part are correspondingly arranged;

The display device includes a first light-shielding glue, the first light-shielding glue is arranged on the outer peripheral wall of the third opening, wherein the outer wall of the third opening passes through the first light-shielding glue and the first polarizer Fixed bonding.

In the display device of the present application, the display device further includes a second light-shielding glue; the second light-shielding glue is disposed in the first opening, and the second light-shielding glue is along the inner peripheral wall of the first opening A closed structure is formed; one end of the second light-shielding glue is bonded to the display panel, and the other end is bonded to the hole wall of the third opening.

In the display device of the present application, the orthographic projection of the second light-shielding glue on the plane where the display panel is located is on the outer periphery of the orthographic projection of the light-transmitting portion on the plane where the display panel is located.

In the display device of the present application, the display panel includes a first substrate and a second substrate. The first substrate includes a first substrate and a first functional film layer disposed on the first substrate. The second substrate includes a second substrate and a second functional film layer provided on the second substrate;

The light-transmitting portion is provided with a first light-transmitting opening and a second light-transmitting opening, wherein the first light-transmitting opening is provided in the first functional film layer, and the second light-transmitting opening is provided in the The second functional film layer.

In the display device of the present application, the second functional film layer further includes a light-shielding layer, and the light-shielding layer is disposed around the second light-transmitting opening.

In the display device of the present application, the first substrate is a thin film transistor array substrate, the second substrate is a color filter substrate, and the second functional film layer includes a color filter layer and a black matrix.

In the display device of the present application, the first opening, the second opening, and the third opening are coaxially arranged with the light transmitting portion.

In the display device of the present application, the area of the first opening and the second opening is larger than the area of the third opening, and the area of the third opening is larger than the light transmitting portion.

In the display device of the present application, the first light-shielding glue and the second light-shielding glue include hot melt glue.

The present application provides a method for manufacturing the above-mentioned display device, which includes the following steps:

The polarizer bonding step prepares a display panel, a first polarizer, and a second polarizer. The display panel includes a light-transmitting portion, and the light-transmitting portion is used to allow light to enter the photosensitive element. A first opening is opened in the film, and a second opening is opened in the second polarizer. The first opening, the second opening and the light-transmitting part are aligned, and the first opening of the display panel The first polarizer is attached to the surface, and the second polarizer is attached to the second surface away from the first polarizer;

In the backlight module assembly step, a backlight module is prepared. A third opening is opened in the backlight module. The third opening is aligned with the light-transmitting part, and the first polarizer is away from the display. A backlight module is arranged on one side of the panel, a first light-shielding glue is arranged on the outer peripheral wall of the third opening, and the outer wall of the third opening of the backlight module and the first polarizer are fixedly bonded.

In the manufacturing method of the present application, the step of assembling the backlight module further includes:

On the inner peripheral wall of the first opening, a circle of second light-shielding glue is formed, and the second light-shielding glue forms a closed structure along the inner peripheral wall of the first opening; one end of the second light-shielding glue is connected to the display The panel is bonded, and the other end of the panel is bonded to the hole wall of the third opening.

In the manufacturing method of the present application, the orthographic projection of the second light-shielding glue on the plane where the display panel is located is on the outer periphery of the orthographic projection of the light-transmitting portion on the plane where the display panel is located.

In the manufacturing method of the present application, the display panel includes a first substrate and a second substrate. The first substrate includes a first substrate and a first functional film layer disposed on the first substrate. The second substrate includes a second substrate and a second functional film layer provided on the second substrate;

The light-transmitting portion is provided with a first light-transmitting opening and a second light-transmitting opening, wherein the first light-transmitting opening is provided in the first functional film layer, and the second light-transmitting opening is provided in the The second functional film layer group.

In the manufacturing method of the present application, the second functional film layer further includes a light-shielding layer, and the light-shielding layer is disposed around the second light-transmitting opening.

In the manufacturing method of the present application, the first substrate is a thin film transistor array substrate, the second substrate is a color filter substrate, and the second functional film layer includes a color filter layer and a black matrix.

In the manufacturing method of the present application, the first opening, the second opening, and the third opening are coaxially arranged with the light-transmitting part.

In the manufacturing method of the present application, the area of the first opening and the second opening is larger than the area of the third opening, and the area of the third opening is larger than the light-transmitting portion.

In the manufacturing method of the present application, the first light-shielding glue and the second light-shielding glue include hot melt glue.

Beneficial effect

Compared with the prior art, the display device of the present application can effectively block the light emitted by the backlight from entering the light-transmitting part by bonding the first polarizer and the outer peripheral wall of the third opening with the first light-shielding glue. At the same time, the problem of lack of glue and glue overflow when the second light-shielding glue is applied is avoided, and the area of the light-transmitting part is guaranteed. It is also possible to prevent the light emitted by the backlight module from entering the light-transmitting part through the first polarizer through the second light-shielding glue arranged along the inner peripheral wall of the first opening. In addition, by providing a light-shielding layer in the display panel, the appearance quality can also be improved.

Description of the drawings

In order to explain the technical solutions in this application more clearly, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the application. For those skilled in the art, without creative work, other drawings can be obtained from these drawings.

FIG. 1 is a schematic front view of a display device according to an embodiment of the present application.

FIG. 2 is a schematic cross-sectional view of the display device of FIG. 1 along the line A-A.

FIG. 3 is an enlarged cross-sectional view of a region 100A of the display device of FIG. 2.

Embodiments of the present invention

The technical solutions in this application will be described clearly and completely below in conjunction with the drawings in the implementation manners of this application. Obviously, the described implementations are only a part of the implementations of the present application, rather than all of the implementations. Based on the implementation in this application, all other implementations obtained by those skilled in the art without creative work fall within the protection scope of this application.

In the description of this application, it should be understood that the terms "center", "thickness", "upper", "lower", "vertical", "horizontal", "inner", "outer", and "one side" indicate The orientation or positional relationship of is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or functional element referred to must have a specific orientation or a specific orientation. The structure and operation cannot therefore be understood as a limitation of this application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with “first” and “second” may explicitly or implicitly include one or more of the features.

The display device 100 provided by the embodiment of the present application may be an electronic device with a display function such as a mobile phone, a tablet computer, a notebook, a game console, a digital camera, a car navigation system, an electronic billboard, an automatic teller machine, and the like.

1 and 2, the display device 100 includes a display panel 10, a first polarizer 20, a second polarizer 30, a backlight module 40 and a photosensitive element 50. The first polarizer 20 is disposed on the first surface of the display panel 10, and the second polarizer 30 is disposed on the second surface of the display panel 10 away from the first surface. The backlight module 40 is disposed on the side of the first polarizer 20 away from the display panel 10.

The display panel 10 includes a first substrate 11, a second substrate 12, and liquid crystal molecules 13 located between the first substrate 11 and the second substrate 12. The first substrate 11 includes a first substrate 111 and a first functional film layer 112 provided on the first substrate 111. The second substrate 12 includes a second substrate 121 and a second functional film layer 122 disposed on the second substrate.

The display panel 10 further includes a light-transmitting portion 10A. The light-transmitting portion 10A is used to allow light to enter the photosensitive element 50. The light-transmitting portion 10A is provided with a first light-transmitting portion opening 11A and a second light-transmitting portion opening 12A. Specifically, a first light-transmitting portion opening 11A is opened in the first functional film layer 112 of the first substrate 11. The first light-transmitting portion opening 11A penetrates the first functional film layer 112 to expose the first substrate 111. A second light-transmitting portion opening 12A is opened in the second functional film layer 122 of the second substrate 12. The second light-transmitting portion opening 12A penetrates the second functional film layer 122 to expose the second substrate 121. Both the first substrate 111 and the second substrate 121 are transparent substrates. A light-shielding layer 123 is further provided on the outer periphery of the second light-transmitting portion opening 12A. For example, the light shielding layer 123 may be provided in a ring shape, a hollow rectangle, or the like. In an embodiment of the present application, the first substrate 11 may be an array substrate, the second substrate 12 may be a color filter substrate, and the second functional film layer 122 includes a color filter layer and a black matrix. The light shielding layer 123 and the black matrix in the second functional film layer 122 may be made of the same material in the same process. Since the black matrix has a mature manufacturing process and high manufacturing precision, it can ensure the beautiful appearance of the light-shielding layer 123.

The first polarizer 20 and the second polarizer 30 may adopt polarizers commonly used in the art. 3, the first polarizer 20 is provided with a first opening 20A, and the second polarizer 30 is provided with a second opening 30A.

The backlight module 40 may be a side-type backlight module or a direct-type backlight module. The backlight module 40 is provided with a third opening 40A.

The first opening 20A, the second opening 30A, the third opening 40A, and the light transmitting portion 10A are correspondingly arranged. In this embodiment, the first opening 20A, the second opening 30A, the third opening 40A, and the light transmitting portion 10A are coaxially arranged. In other embodiments, it may be the first opening 20A and the second opening 30A, and the orthographic projection of the third opening 40A on the display panel 10 completely overlaps the light-transmitting portion 10A. In this embodiment, the first opening 20A, the second opening 30A, the third opening 40A, and the light-transmitting portion 10A may have substantially the same shape, for example, a circle, a rectangle, or other regular or irregular shapes. In other embodiments of the present application, the first opening 20A, the second opening 30A, the third opening 40A, and the light-transmitting portion 10A may also have different shapes. The area of the first opening 20A and the second opening 30A is larger than that of the third opening 40A. The area of the third opening 40A is larger than that of the light-transmitting portion 10A.

The photosensitive element 50 is disposed in the third opening 40A. The photosensitive element 50 includes, but is not limited to, a front camera, a face recognition photosensitive element, a gesture sensor, and the like.

The display device 100 further includes a first light-shielding glue 61 and a second light-shielding glue 62. The first light-shielding glue 61 surrounds the outer peripheral wall of the third opening 40A. The outer peripheral wall of the third opening 40A is fixedly bonded to the first polarizer 20 by the first light-shielding glue 61. The first light-shielding glue 61 can prevent the light emitted by the backlight module 40 from entering the light-transmitting portion 10A. The second light-shielding glue 62 is arranged around the inner wall of the first opening 20A, and the second light-shielding glue 62 is arranged between the display panel 10 and the backlight module 40. The second light-shielding glue 62 can prevent the light emitted from the backlight module 40 from entering the light-transmitting part 10A through the first polarizer 20. Specifically, the second light-shielding glue 62 forms a closed structure along the inner peripheral wall of the first opening 20A. One end of the second light-shielding glue 62 is bonded to the display panel 10, and the other end thereof is bonded to the hole wall of the third opening 40A. The orthographic projection of the second light-shielding glue 62 on the plane where the display panel 10 is located is on the outer periphery of the orthographic projection of the light-transmitting portion 10A on the plane where the display panel 10 is located.

Compared with the prior art, the display device of the present application uses the first light-shielding glue instead of the mouth glue to fix and bond the first polarizer and the outer peripheral wall of the third opening, which can effectively block the light emitted by the backlight from entering the light-transmitting part. At the same time, the problem of lack of glue and glue overflow when the second light-shielding glue is applied is avoided, and the area of the light-transmitting part is guaranteed. It is also possible to prevent the light emitted by the backlight module from entering the light-transmitting part through the first polarizer through the second light-shielding glue arranged along the inner peripheral wall of the first opening. In addition, by providing a light-shielding layer in the display panel, the appearance quality can also be improved.

Another embodiment of the present application discloses a manufacturing method of the display device 100, which includes the following steps:

In the polarizer bonding step, the display panel 10 and the first polarizer 20 and the second polarizer 30 are prepared. The display panel 10 includes a light-transmitting portion 10A, and the light-transmitting portion 10A is used to allow light to enter the photosensitive element 50. The first polarizer 20 is provided with a first opening 20A, and the second polarizer 30 is provided with a second opening 30A. Align the first opening 20A and the second opening 30A with the light-transmitting portion 10A, attach the first polarizer 20 to the first surface of the display panel 10, and attach the second polarizer 30 to the second surface away from the first surface .

Specifically, the manufacturing steps of the display panel 10 include: forming a first functional film layer 112 on the first substrate 111 and opening a first light-transmitting opening 112A in the first functional film layer 112 to form the first substrate 11. A second functional film layer 122 is formed on the second substrate 121, and a second light-transmitting opening 122A is opened in the second functional film layer 122 and a light-shielding layer 123 is formed around the second light-transmitting opening 122A. Thus, the second substrate 12 is formed. In one embodiment, the first substrate 11 is an array substrate, and the second substrate 12 is a color filter substrate. The light shielding layer 123 and the black matrix on the color filter substrate can be made of the same material in the same process. The first substrate 11 and the second substrate 12 are aligned, the first substrate 11 and the second substrate 12 are filled with liquid crystal, and the first substrate 11 and the second substrate 12 are bonded together using a sealing material to seal the liquid crystal. The first light-transmitting opening 112A and the second light-transmitting opening 122A form a light-transmitting portion 10A. The areas of the first opening 20A and the second opening 30A are larger than the light-transmitting portion 10A. A first opening 20A is opened in the first polarizer 20, and a first opening 30A is opened in the second polarizer 30.

In the backlight module assembly step, a backlight module 40 is prepared, and a third opening 40A is opened in the backlight module 40. The area of the third opening 40A is larger than that of the first opening 20A and the second opening 30A. The third opening 40A is aligned with the light-transmitting portion 10A, and a backlight module 40 is provided on the side of the first polarizer 20 away from the display panel 10. A first light-shielding glue 61 is arranged on the outer peripheral wall of the third opening 40A to fix and bond the backlight module 40 and the first polarizer 20. The first opening 20A, the second opening 30A, the third opening 40A, and the light transmitting portion 10A are correspondingly arranged. In this embodiment, the first opening 20A, the second opening 30A, the third opening 40A, and the light transmitting portion 10A may be coaxially arranged.

The backlight module assembly step may further include: forming a second light-shielding glue 62 on the inner wall of the first opening 20A, and the second light-shielding glue 62 fixes and adheres the display panel 10 and the backlight module 40. Specifically, the second light-shielding glue 62 forms a closed structure along the inner peripheral wall of the first opening 20A. One end of the second light-shielding glue 62 is bonded to the display panel 10, and the other end thereof is bonded to the hole wall of the third opening 40A. The orthographic projection of the second light-shielding glue 62 on the plane where the display panel 10 is located is on the outer periphery of the orthographic projection of the light-transmitting portion 10A on the plane where the display panel 10 is located.

The first light-shielding glue 61 and the second light-shielding glue 62 can be, for example, hot melt glue. The method of forming the first light-shielding glue 61 and the second light-shielding glue 62 may be coating or dispensing.

The manufacturing method may further include the step of arranging the photosensitive element, aligning the light-transmitting portion 10A with the photosensitive element 5, and disposing the photosensitive element 50 in the third opening 40A.

Compared with the prior art, the display device and the manufacturing method of the present application replace the existing gap glue by coating the light-shielding glue on the opening position of the backlight module of the backlight module, because there is no opening in the opening position of the backlight module. The coating of the subsequent light-shielding glue is not affected, which can effectively block the light of the backlight module from entering the camera field of view, and can effectively improve the appearance quality of the camera area. In addition, in the present application, a black matrix is provided in the display panel instead of the light-shielding glue as the appearance of the photosensitive element, and the appearance quality is further improved.

The above provides a detailed introduction to the implementation of the application, and specific examples are used in this article to describe the principles and implementations of the application, and the description of the implementations above is only used to help understand the application. At the same time, for those skilled in the art, according to the idea of this application, there will be changes in the specific implementation and the scope of application. In summary, the content of this specification should not be construed as a limitation to this application.

Claims

A display device includes:

Display panel

The first polarizer is arranged on the first surface of the display panel;

The second polarizer is disposed on the second surface of the display panel away from the first polarizer;

The backlight module is arranged on the side of the first polarizer away from the display panel;

Wherein, the display panel includes a light-transmitting portion for allowing light to enter the photosensitive element, a first opening is opened in the first polarizer, and a second opening is opened in the second polarizer , A third opening is opened in the backlight module, and the first opening, the second opening, the third opening, and the light-transmitting part are correspondingly arranged;

The display device includes a first light-shielding glue, the first light-shielding glue is arranged on an outer peripheral wall of the third opening, wherein the outer peripheral wall of the third opening passes through the first light-shielding glue and the first light-shielding glue. A polarizer is fixed and bonded.
8. The display device of claim 1, wherein the display device further comprises a second light-shielding glue; the second light-shielding glue is disposed in the first opening, and the second light-shielding glue is along the first opening. The inner peripheral wall of the opening forms a closed structure; one end of the second light-shielding glue is bonded to the display panel, and the other end is bonded to the hole wall of the third opening.
3. The display device of claim 2, wherein the orthographic projection of the second light-shielding glue on the plane where the display panel is located is located on the outer periphery of the orthographic projection of the light-transmitting portion on the plane where the display panel is located.
The display device of claim 1, wherein the display panel includes a first substrate and a second substrate, and the first substrate includes a first substrate and a first functional film disposed on the first substrate Layer, the second substrate includes a second substrate and a second functional film layer disposed on the second substrate;

The light-transmitting portion is provided with a first light-transmitting opening and a second light-transmitting opening, wherein the first light-transmitting opening is provided in the first functional film layer, and the second light-transmitting opening is provided in the The second functional film layer group.
8. The display device of claim 4, wherein the second functional film layer further comprises a light-shielding layer, and the light-shielding layer is disposed around the second light-transmitting opening.
7. The display device of claim 5, wherein the first substrate is a thin film transistor array substrate, the second substrate is a color filter substrate, and the second functional film layer includes a color filter layer and a black matrix.
8. The display device of claim 1, wherein the first opening, the second opening, and the third opening are coaxially arranged with the light-transmitting part.
8. The display device of claim 1, wherein the area of the first opening and the second opening is larger than the area of the third opening, and the area of the third opening is larger than the light-transmitting portion.
The display device of claim 1, wherein the first light-shielding glue and the second light-shielding glue comprise hot melt glue.
A method of manufacturing a display device according to claim 1, which comprises the following steps:

The polarizer bonding step prepares a display panel, a first polarizer, and a second polarizer. The display panel includes a light-transmitting portion, and the light-transmitting portion is used to allow light to enter the photosensitive element. A first opening is opened in the film, and a second opening is opened in the second polarizer. The first opening, the second opening and the light-transmitting part are aligned, and the first opening of the display panel The first polarizer is attached to the surface, and the second polarizer is attached to the second surface away from the first polarizer;

In the backlight module assembly step, a backlight module is prepared. A third opening is opened in the backlight module. The third opening is aligned with the light-transmitting part, and the first polarizer is away from the display. A backlight module is arranged on one side of the panel, a first light-shielding glue is arranged on the outer peripheral wall of the third opening, and the outer peripheral wall of the third opening of the backlight module and the first polarizer are fixedly bonded.
10. The method of manufacturing a display device according to claim 10, wherein the step of assembling the backlight module further comprises:

On the inner peripheral wall of the first opening, a circle of second light-shielding glue is formed, and the second light-shielding glue forms a closed structure along the inner peripheral wall of the first opening; one end of the second light-shielding glue is connected to the display The panel is bonded, and the other end of the panel is bonded to the hole wall of the third opening.
The method of manufacturing a display device according to claim 11, wherein the orthographic projection of the second light-shielding glue on the plane where the display panel is located is the orthographic projection of the light-transmitting part on the plane where the display panel is located. Peripheral.
10. The method of manufacturing a display device according to claim 10, wherein the display panel includes a first substrate and a second substrate, and the first substrate includes a first substrate and a second substrate disposed on the first substrate. A functional film layer, the second substrate includes a second substrate and a second functional film layer disposed on the second substrate;

The light-transmitting portion is provided with a first light-transmitting opening and a second light-transmitting opening, wherein the first light-transmitting opening is provided in the first functional film layer, and the second light-transmitting opening is provided in the The second functional film layer group.
13. The method of manufacturing a display device according to claim 13, wherein the second functional film layer further comprises a light-shielding layer, and the light-shielding layer is disposed around the second light-transmitting opening.
The method for manufacturing a display device according to claim 14, wherein the first substrate is a thin film transistor array substrate, the second substrate is a color filter substrate, and the second functional film layer includes a color filter layer and a black matrix .
10. The method of manufacturing a display device according to claim 10, wherein the first opening, the second opening, and the third opening are coaxially arranged with the light-transmitting portion.
11. The display device of claim 10, wherein the area of the first opening and the second opening is larger than the area of the third opening, and the area of the third opening is larger than the light-transmitting portion.
10. The display device of claim 10, wherein the first light-shielding glue and the second light-shielding glue comprise hot melt glue.