CN112799245A

CN112799245A - Display device and preparation method thereof

Info

Publication number: CN112799245A
Application number: CN201911115170.3A
Authority: CN
Inventors: 臧远生; 李慧子; 王春
Original assignee: BOE Technology Group Co Ltd; Hefei BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Hefei BOE Optoelectronics Technology Co Ltd
Priority date: 2019-11-14
Filing date: 2019-11-14
Publication date: 2021-05-14
Anticipated expiration: 2039-11-14
Also published as: CN112799245B

Abstract

The invention discloses a display device and a preparation method of the display device. The display device comprises a first substrate and a second substrate which are arranged opposite to each other, wherein at least one of the first substrate and the second substrate adopts a flexible substrate. According to the display device provided by the embodiment of the invention, at least one of the first substrate and the second substrate adopts the flexible substrate, so that the thickness and the weight of the display device can be reduced, and the display device is light and thin. When the first substrate is a flexible substrate, the first binding region of the first substrate can be bent towards the direction deviating from the second substrate, so that the first control module is hidden at one side of the second substrate towards the first substrate, the size of a frame of the display device is effectively reduced, and the narrow frame and the frameless frame of the display device are favorably realized.

Description

Display device and preparation method thereof

Technical Field

The invention relates to the technical field of display, in particular to a display device and a preparation method of the display device.

Background

With the improvement of living standard, people have higher and higher requirements on electronic products, and not only the performance of the products but also the weight and the appearance of the products are concerned gradually. Thin Film Transistor Liquid Crystal displays (TFT-LCDs) have the advantages of small size, low power consumption, no radiation, and the like, and are the main bodies of various electronic products. In order to respond to market demands, narrow-frame and full-screen liquid crystal displays are rapidly developed to become the mainstream of the market, and various manufacturers of large liquid crystal displays begin to develop full-screen liquid crystal displays.

In the prior art, the liquid crystal display has the problems of wide frame, large thickness and heavy weight, and further development of the liquid crystal display is seriously influenced.

Disclosure of Invention

An object of an embodiment of the present invention is to provide a display device and a method for manufacturing the display device, so as to reduce the thickness and weight of the display device.

In order to solve the above technical problem, an embodiment of the present invention provides a display device including a first panel including a first substrate and a second substrate provided to a cell, at least one of the first substrate and the second substrate using a flexible substrate.

Optionally, the first substrate is a flexible substrate, the display device includes a display area and a frame area located outside the display area, the first substrate has a first binding area in the frame area, the first binding area is bound and connected with a first control module, and the first binding area of the first substrate is bent towards a direction away from the second substrate, so that the first control module is hidden at a side of the second substrate facing the first substrate.

Optionally, the first panel further includes a first polarizer disposed on a side of the first substrate facing away from the second substrate, and a second polarizer disposed on a side of the second substrate facing away from the first substrate, and the display device further includes a backlight unit disposed on a side of the first panel facing the first substrate.

Optionally, the second polarizer includes a 6H polarizer or a 9H polarizer, the display device further includes a back plate, the back plate is disposed on a side of the backlight unit departing from the first panel, and the second polarizer forms an outer surface of a light emitting side of the display device.

Optionally, the display device further includes a second panel, the second panel is disposed on one side of the first panel facing the first substrate, the second panel includes a third substrate and a fourth substrate that are disposed opposite to each other, the fourth substrate faces the first substrate, the third substrate adopts a flexible substrate, the third substrate has a second binding region in a frame region, the second binding region is bound and connected with a second control module, and the second binding region of the third substrate is bent towards a direction away from the fourth substrate, so that the second control module is hidden on one side of the fourth substrate facing the third substrate.

Optionally, the second substrate or/and the fourth substrate is/are a flexible substrate.

Optionally, the first panel includes a display panel, the second panel includes a local dimming panel, the second panel is provided with a plurality of dimming units, the plurality of dimming units correspond to the pixel units of the first panel one to one, and the dimming units are used for adjusting the brightness of light entering the corresponding pixel units.

Optionally, the first panel further comprises a first polarizer arranged on one side of the first substrate, which deviates from the second substrate, and a second polarizer arranged on one side of the second substrate, the second panel further comprises a third polarizer arranged on one side of the fourth substrate, which deviates from the third substrate, and the first polarizer, the second polarizer and the third polarizer all comprise 6H polarizers or 9H polarizers.

In order to solve the above technical problem, an embodiment of the present invention further provides a method for manufacturing a display device, including:

preparing a first substrate and a second substrate, wherein the preparing of the first substrate comprises forming a flexible substrate on a hard substrate; preparing a control structure layer on the flexible substrate; forming an orientation layer on the control structure layer, wherein the first substrate is provided with a first binding region;

aligning the first substrate and the second substrate to a cassette;

peeling at least a portion of the hard substrate corresponding to the first binding region from the first substrate;

binding and connecting a first control module to the binding area;

and bending the first binding area of the first substrate towards a direction departing from the second substrate, so that the first control module is hidden at one side of the second substrate, which faces the first substrate.

Alternatively,

before the binding the first control module to the first binding region, the preparation method further comprises: attaching a first polarizer to one side of the first substrate, which is far away from the second substrate, and attaching a second polarizer to one side of the second substrate, which is far away from the first substrate;

before bending the first binding region toward a direction away from the second substrate, the manufacturing method further includes: and assembling a backlight unit on one side of the first polarizer, which is far away from the first substrate.

Optionally, the preparation method further comprises the steps of,

and assembling a back plate on one side of the backlight unit, which is far away from the first substrate, so that the second polaroid forms the outer surface of the light emitting side of the display device, and the second polaroid comprises a 6H polaroid or a 9H polaroid.

preparing a first panel and a second panel, wherein the first panel comprises a first substrate and a second substrate which are arranged oppositely to each other, the second panel comprises a third substrate and a fourth substrate which are arranged oppositely to each other, the first substrate and the third substrate are both flexible substrates, the first substrate is provided with a first binding area, the first binding area is bound and connected with a first control module, the third substrate is provided with a second binding area, and the second binding area is bound and connected with a second control module;

attaching the first panel and the second panel such that the fourth substrate faces the first substrate;

and bending the first binding region towards a direction departing from the second substrate, so that the first control module is hidden at one side of the second substrate facing the first substrate, and bending the second binding region towards a direction departing from the fourth substrate, so that the second control module is hidden at one side of the fourth substrate facing the third substrate.

According to the display device provided by the embodiment of the invention, at least one of the first substrate and the second substrate adopts the flexible substrate, so that the thickness and the weight of the display device can be reduced, and the display device is light and thin.

According to the display device provided by the embodiment of the invention, the first substrate is a flexible substrate, and the flexible substrate has flexibility and bending resistance, so that the first binding region of the first substrate can be bent towards the direction departing from the second substrate, and the first control module is hidden at the side of the second substrate, which faces the first substrate. According to the structure, the area where the chip, the flexible circuit board and the printed circuit board module are located does not occupy the size in the direction parallel to the second substrate, but is hidden at the lower side of the second substrate, so that the increase of the frame of the display device caused by the chip, the flexible circuit board and the printed circuit board module is avoided, the size of the lower frame of the display device is effectively reduced, and the narrow frame and the frameless frame of the display device are favorably realized. In addition, according to the display device provided by the embodiment of the invention, the first substrate adopts the flexible substrate, and glass is not used as the substrate, so that the weight and the thickness of the display device are reduced, and the display device is light and thin.

The double-panel display device of the embodiment of the invention effectively reduces the thickness and the weight of the double-panel display device, easily realizes the extremely-light and thin effect, effectively solves the defects of over-thick thickness and over-heavy weight of the double-panel display device, effectively reduces the size of the lower frame of the display device, is beneficial to realizing the narrow frame and the frameless frame of the display device, and greatly improves the application value and the market competitiveness of the double-panel display device.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.

FIG. 1 is a schematic plan view of a display device;

FIG. 2 is a schematic view of a structure B-B of the display device shown in FIG. 1 in one embodiment;

FIG. 3 is a schematic view of a structure B-B of the display device shown in FIG. 1 in another embodiment;

FIG. 4 is a schematic diagram of a dual panel display device;

FIG. 5 is a schematic structural diagram of a display device according to a first embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a display device according to a second embodiment of the present invention;

FIG. 7 is a schematic structural diagram of another frame region of a display device according to a second embodiment of the present invention;

FIG. 8 is a schematic diagram showing a configuration of the display device after the first substrate and the second substrate are aligned with each other;

fig. 9 is a schematic structural view of the display device after the hard substrate is peeled off from the first base plate;

FIG. 10 is a schematic structural diagram of a display device after a first polarizer and a second polarizer are attached;

FIG. 11 is a schematic structural diagram of a display device according to a fourth embodiment of the present invention;

FIG. 12 is a schematic view of a display device according to another embodiment of the present invention;

FIG. 13 is a schematic structural diagram of a display device according to another embodiment of the present invention;

fig. 14 is a schematic structural view of a double-panel display device.

Description of reference numerals:

10 — a first panel; 11 — a first substrate; 12 — a second substrate;

13 — a first liquid crystal layer; 20 — a second panel; 21 — a third substrate;

22 — a fourth substrate; 23 — a second liquid crystal layer; 41-a first control module;

42-a second control module; 51-a first polarizer; 52-a second polarizer;

53-third polarizer; 60 — a backlight unit; 71-a back plate;

81-foam cotton; 82, adhesive tape; 91-flexible circuit board;

92-chip; 93-printed circuit board module.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

Fig. 1 is a schematic plan view of a display device. The display device is an LCD display device, and as shown in fig. 1, the display device has an upper (Up) frame, a lower (Down) frame, a Left (Left) frame, and a Right (Right) frame. With the development of science and technology, the upper frame, the left frame and the right frame can be narrow frames or even frameless, but the lower frame is required to be narrow frames or even frameless, and certain difficulty still exists.

FIG. 2 is a schematic view of a structure B-B of the display device shown in FIG. 1 in one embodiment. As shown in fig. 2, the display device includes a first substrate 11 (typically, an array substrate) and a second substrate 12 (typically, a color filter substrate) which are provided in a cassette. The display device further includes a first polarizing plate 51 disposed on the lower side of the first substrate 11, a backlight unit 60 disposed on the lower side of the first polarizing plate 51, a back plate 71 disposed on the lower side of the backlight unit 60, a second polarizing plate 52 disposed on the upper side of the second substrate 12, and a cover plate 72 disposed on the upper side of the second polarizing plate 52. An accommodating space is formed between the back plate 71 and the cover plate 72, and the first substrate 11, the second substrate 12, the first polarizing plate 51, the second polarizing plate 52 and the backlight unit 60 are all located in the accommodating space. Typically, the cover 72 side is the light exit side. Also shown in FIG. 2 is foam 81 located within back panel 71, and tape 82 located between cover 72 and second polarizer 52. In actual practice, the tape 82 may not be provided.

As shown in fig. 2, in order to bond and connect a Flexible Printed Circuit (FPC) 91 and a chip (IC)92, the first substrate 11 protrudes from the second substrate 12 at the lower frame region so as to form a bonding region for connecting the Flexible printed circuit 91 and the chip 92. The bonding area is bonded with a chip 92 and a flexible Printed Circuit Board 91, and the flexible Printed Circuit Board is connected with a Printed Circuit Board (PCBA) 93. Generally, the substrates of the first substrate 11 and the second substrate 12 are glass, the rigid structure of the glass determines that the first substrate 11 cannot be bent, and the placement areas of the chip 92, the flexible printed circuit board 91 and the printed circuit board module 93 occupy positions in a direction parallel to the first substrate, which eventually results in that the lower frame of the display device shown in fig. 2 cannot be effectively reduced, and a narrow frame of the lower frame cannot be realized.

FIG. 3 is a schematic view of a structure B-B of the display device shown in FIG. 1 in another embodiment. Unlike the display device shown in fig. 2, in the display device shown in fig. 3, the first substrate 11 is reversed, that is, the first substrate 11 and the second substrate 12 are reversed in position, and the first substrate 11 faces the light-emitting side. In the display device shown in fig. 3, in order to further save cost, the second polarizer 52 may be a 6H polarizer or a 9H polarizer (it is easy to understand that the 6H polarizer is a polarizer with a hardness of 6H, and the 9H polarizer is a polarizer with a hardness of 9H), so that the cover plate 72 in fig. 2 may be omitted, and the purpose of saving cost is achieved. Meanwhile, the flexible printed circuit board 91 and the printed circuit board module 93 are bent towards the backlight unit 60, so that the occupied size of the flexible printed circuit board 91 and the printed circuit board module 93 in the width direction is reduced, the width of the lower frame of the display device can be reduced, and the narrow frame design of the lower frame is facilitated.

Although the width of the bottom frame can be reduced to some extent compared to fig. 2, the bonding region of the first substrate still protrudes from the second substrate, and occupies a dimension parallel to the second substrate. Meanwhile, the first substrate 11 (array substrate) is placed in an inverted manner, and the plurality of metal wires are arranged on the first substrate 11, so that the metal wires can reflect light in the display process, and the reflectivity reaches over 10%, so that the display device has an extremely poor visual effect. In order to improve the light reflection of the first substrate 11, a low reflection design is required, and thus the MoOx material needs to be developed. Therefore, the process difficulty and the production cost of the display device are increased, the reflectivity can be improved to about 5%, the display effect of the display device shown in fig. 2 cannot be achieved, and the picture quality of the display device is influenced.

In addition, as LCD technology is continuously developed, LCD technology encounters a certain bottleneck, such as a Contrast Ratio (CR) problem. The contrast ratio of the LCD display device is too low compared to the million-level contrast ratio of the Organic Light Emitting Diode (OLED) display device and the Mini LED display device. In order to solve the problem that the CR of the LCD device is low and the visual perception is affected, a dual panel technology has been developed.

Fig. 4 is a schematic structural diagram of a dual panel display device. As shown in fig. 4, the display device includes a first panel 10 and a second panel 20 which are stacked. The first panel 10 is typically a display panel and the second panel 20 is typically a local dimming panel. The first panel 10 includes a first substrate 11 (typically, an array substrate) and a second substrate 12 (typically, a color filter substrate) which are arranged in a box-to-box manner, and a first liquid crystal layer 13 located between the first substrate 11 and the second substrate 12. The first panel 10 further includes a first polarizer 51 disposed on a side of the first substrate 11 facing away from the second substrate 12, and a second polarizer 52 disposed on a side of the second substrate 12 facing away from the first substrate 11. The second panel 20 includes a third substrate 21 (typically, an array substrate) and a fourth substrate 22 provided to the cell, and a second liquid crystal layer 23 between the third substrate 21 and the fourth substrate 22. The second panel is usually a local dimming panel, and therefore the fourth substrate 22 is usually a color film substrate, but since the second panel is not used for displaying color, a color film may not be disposed on the fourth substrate 22. The second panel 20 further comprises a third polarizer 53 arranged on the side of the third substrate 21 facing away from the fourth substrate 22. The fourth substrate 22 is disposed toward the first substrate 11. The display device further comprises a backlight unit 60, the backlight unit 60 being arranged at a side of the second panel 20 facing away from the first panel 10. It is understood by those skilled in the art that the backlight unit 60 may include a lamp housing, a backlight source, a reflective plate, a light guide plate, a diffusion plate, etc. which can convert the light emitted from the backlight source into a surface light source with uniform brightness, so that the light emitted from the backlight unit 60 toward the second panel 20 is a surface light source with uniform brightness. The dual panel display device allows light of the backlight unit 60 to undergo liquid crystal modulation of two layers before reaching the eyes of a user, improving the contrast of the display device. In fig. 4, the first substrate 11, the second substrate 12, the third substrate 21, and the fourth substrate 22 all use glass as a base, which results in that the thickness and the weight of the display device shown in fig. 4 are increased by more than one time compared with a single panel display device, and the development of the double panel display device is seriously affected. In a display device constructed as shown in fig. 4, the thickness of the display device is 1.1mm (0.5mm +0.6mm) plus the thickness of the backlight unit 60, which has a serious influence on the development of the dual panel display device.

It is easily understood that the display device as shown in fig. 4 has a frame region, and the first substrate 11 has a first binding region in the frame region, and the first binding region is bound with the first control module 41. The first control module can comprise a chip, a flexible circuit board, a printed circuit board module and the like. The third substrate 21 has a second binding region in the frame region, and the second binding region is bound with a second control module 42. The second control module 42 may include a chip, a flexible printed circuit board, a printed circuit board module, and the like.

In order to solve the problems of large thickness and heavy weight of a display device, the embodiment of the invention provides the display device. The display device provided by the embodiment of the invention comprises a first panel, wherein the first panel comprises a first substrate and a second substrate which are arranged opposite to each other, and at least one of the first substrate and the second substrate adopts a flexible substrate.

The technical contents of the present invention will be described in detail by specific embodiments.

The first embodiment:

fig. 5 is a schematic structural diagram of a display device according to a first embodiment of the invention. As shown in fig. 5, the display device includes a first panel including a first substrate 11 (typically, an array substrate) and a second substrate 12 (typically, a color filter substrate) that are arranged in a box-to-box manner, and a backlight unit 60. The first panel further includes a first polarizer 51 and a second polarizer 52. At least one of the first substrate 11 and the second substrate 12 is a flexible substrate. The backlight unit 60 is disposed on a side of the first substrate 11 facing away from the second substrate 12, the first polarizer 51 is disposed on a side of the first substrate 11 facing away from the second substrate 12, and the second polarizer 52 is disposed on a side of the second substrate 12 facing away from the first substrate 11. The second polarizer 52 includes a 6H polarizer or a 9H polarizer, and it is easily understood that the 6H polarizer is a 6H-hard polarizer and the 9H polarizer is a 9H-hard polarizer. In fig. 5, the first substrate 11 is a flexible substrate, and the second polarizer is a 6H polarizer or a 9H polarizer.

In the display device of the embodiment of the invention, at least one of the first substrate 11 and the second substrate 12 adopts the flexible substrate, so that the thickness and the weight of the display device can be reduced, and the display device is light and thin. In addition, the second polarizer 52 includes a 6H polarizer or a 9H polarizer, which can increase the rigidity of the display device, and the 6H polarizer or the 9H polarizer can also be used as a cover plate of the display device, thereby further saving the cost of the display device.

Also shown in FIG. 5 is an adhesive tape 82 positioned between first substrate 12 and second polarizer 52. It will be readily appreciated that in actual practice, the tape 82 may not be provided.

Second embodiment:

based on the inventive concept of the foregoing embodiments, a second embodiment of the present invention proposes a display device.

Fig. 6 is a schematic structural diagram of a display device according to a second embodiment of the invention. Fig. 1 is a schematic plan view of the display device of the present embodiment, and fig. 6 is a schematic B-B sectional view of fig. 1. As shown in fig. 1, the display device includes a display area and a bezel area. As shown in fig. 6, the display device includes a first panel, the first panel includes a first substrate 11 and a second substrate 12, the first substrate 11 is a flexible substrate, the first substrate 11 has a first binding region in a frame region (in this embodiment, a lower frame region), the first binding region is bound with a first control module, and the first binding region of the first substrate 11 is bent toward a direction away from the second substrate 12, so that the first control module is hidden at a side of the second substrate 12 facing the first substrate 11. The first control module may include a chip 92, a flexible printed circuit board 91, a printed circuit board module 93, and the like. The chip 92 and the flexible printed circuit board 91 are both bound and connected in the first binding area, and the flexible printed circuit board 91 is connected with a printed circuit board module 93. After the first bonding area of the first substrate 11 is bent towards a direction away from the second substrate 12, the chip 92, the flexible printed circuit board 91 and the printed circuit board module 93 are folded on the side of the second substrate 12 facing the first substrate 11 in a curling manner.

In the display device of the embodiment of the invention, the first substrate 11 is a flexible substrate, and the flexible substrate has flexibility and bending resistance, so that the first binding region of the first substrate 11 can be bent towards a direction away from the second substrate 12, and the first control module is hidden at one side of the second substrate 12 facing the first substrate 11. With the structure, the chip 92, the flexible printed circuit board 91 and the printed circuit board module 93 are not occupied by the area in the direction parallel to the second substrate 12, but hidden at the lower side of the second substrate 12, so that the increase of the frame of the display device caused by the chip 92, the flexible printed circuit board 91 and the printed circuit board module 93 is avoided, the size of the lower frame of the display device is effectively reduced, and the narrow frame and the frameless frame of the display device are favorably realized. In addition, according to the display device of the embodiment of the invention, the first substrate 11 adopts the flexible substrate, and glass is not used as the substrate, so that the weight and the thickness of the display device are reduced, and the display device is light and thin.

In the display device shown in fig. 3, the chip 92, the flexible printed circuit board 91 and the printed circuit board module 93 are all located in the area of the first substrate 11, although the size of the lower frame of the display device is reduced compared to fig. 2, the width of the first bonding area of the first substrate still exists, the first bonding area protrudes from the second substrate, and the first bonding area still occupies the frame size of the display device. Compared with the display device shown in fig. 3, the display device of the embodiment of the invention has the advantages that the first binding region of the first substrate 11 is bent towards the direction away from the second substrate 12, so that the chip 92, the flexible circuit board 91 and the printed circuit board module 93 are curled, folded and hidden at the side of the second substrate 12 facing the first substrate 11 and do not protrude out of the second substrate, and therefore, the first binding region does not occupy the frame size of the display device any more, therefore, compared with the display device shown in fig. 3, the display device of the embodiment of the invention further reduces the frame size of the display device, and is beneficial to realizing the narrow frame and frameless design of the display device.

As shown in fig. 6, the first panel further includes a first polarizing plate 51 and a second polarizing plate 52. The first polarizer 51 is disposed on a side of the first substrate 11 facing away from the second substrate 12, the second polarizer 52 is disposed on a side of the second substrate 12 facing away from the first substrate 11, and the backlight unit 60 is disposed on a side of the first panel facing toward the first substrate 11, that is, the backlight unit 60 is disposed on a side of the first polarizer 51 facing away from the first substrate 11. With the structure, one side of the second substrate 12 departing from the first substrate 11 is the light-emitting side, and compared with the display device shown in fig. 3, the first substrate 11 is no longer located at the light-emitting side, so that metal wiring on the first substrate 11 does not cause metal reflection any more, the problem of picture reflection is effectively improved, the visual effect and the picture quality of the display device are improved, and meanwhile, the process difficulty and the production cost of the display device are reduced.

As shown in fig. 6, the display device may further include a back plate 71. The back sheet 71 is disposed at a side of the backlight unit 60 facing away from the first polarizer 51. In one embodiment, the second polarizer 52 may include a rigid polarizer, such as a 6H polarizer or a 9H polarizer. Such a second polarizer 52 has better hardness and rigidity, and can replace the cover plate in fig. 2, so that the second polarizer can form the outer surface of the light emitting side of the display device, that is, the second polarizer 52 and the back plate 71 form the frame structure of the display device, thereby eliminating the use of the cover plate and reducing the cost of the display device.

Fig. 6 also shows a foam 81 located within the back panel 71, which foam 81 may serve as a support. As shown in fig. 6, after the binding region of the first substrate 11 is bent away from the second substrate 12, the foam 81 may be used to support the bent portion of the first substrate 11, so that the bent portion is kept fixed.

Table 1 is a comparison of the weight, thickness and bottom border width of the display devices of fig. 2, 3 and 6 (taking a 15.0FHB display device as an example), and it can be seen from table 1 that the weight of the display device of the embodiment of the present invention is reduced by about 50%, the thickness is reduced by about 48%, and the bottom border width is reduced by about 85% compared to the display device of fig. 2. Compared with the display device shown in fig. 3, the display device (as shown in fig. 6) according to the embodiment of the present invention has reduced weight, thickness, and lower bezel width, and is more favorable for realizing narrow bezel and light weight of the display device.

TABLE 1 comparison of weight, thickness and lower frame width for three display devices

FIG. 7 is a schematic structural diagram of another frame region of a display device according to a second embodiment of the present invention. As shown in fig. 7, in the other frame region of the display device, since the first substrate 11 no longer has the bonding region, the first substrate 11 may not be bent. In this embodiment, the lower frame of the display device is as shown in fig. 6, and since the upper frame, the left frame and the right frame are not provided with the control component, the upper frame, the left frame and the right frame may be as shown in fig. 7. It is easy to understand that, when another frame of the display device is also provided with the binding region for binding and connecting the control module, the corresponding binding region can be bent towards the direction deviating from the second substrate 12, so that the control module does not occupy the dimension in the direction parallel to the second substrate 12, thereby avoiding the binding region occupying the frame dimension of the display device.

The third embodiment:

a third embodiment of the present invention provides a method for manufacturing a display device, including:

aligning the first substrate and the second substrate to a cassette;

binding and connecting a first control module to the first binding area;

In one embodiment of the present invention,

before the binding the first control module to the first binding region, the preparation method may further include: attaching a first polarizer to one side of the first substrate, which is far away from the second substrate, and attaching a second polarizer to one side of the second substrate, which is far away from the first substrate;

before bending the first binding region toward a direction away from the second substrate, the manufacturing method may further include: and assembling a backlight unit on one side of the first polarizer, which is far away from the first substrate.

In one embodiment, the method of making may further comprise,

The technical scheme of the embodiment of the invention is explained in detail in the following with the preparation process of the display device. The "patterning process" in the embodiments may include processes of coating photoresist, mask exposure, development, etching, and stripping photoresist, and is a well-established manufacturing process. The coating may be performed by a known coating process, and is not particularly limited.

S11: a first substrate, typically an array substrate, and a second substrate, typically a color filter substrate, are prepared.

Preparing the first substrate may include: coating a layer of flexible material on the hard substrate, wherein the flexible material can be polyimide and other materials; curing the flexible material into a film to form a flexible substrate, wherein the flexible material can be cured into a film by adopting a hot plate vacuum drying device (HVCD), sintering or baking method; preparing a control structure layer on a flexible substrate; and forming an orientation layer on the control structure layer. Forming the alignment layer on the control structure layer may include: coating an orientation liquid (such as a polyimide solution) on the control structure layer and curing to form a film; the alignment layer is formed by subjecting the alignment film to an alignment treatment (e.g., rubbing). It is easily understood that the control structure layer may include a thin film transistor, a gate line, a data line, a pixel electrode, etc., and the thin film transistor, the gate line, the data line, the pixel electrode, etc., may be formed using a patterning process. The rigid substrate may be glass or the like.

The second substrate may be formed by a conventional method, and may include a glass substrate, a color film formed on the glass substrate, a black matrix, and the like. The structure and the preparation method of the second substrate are conventional in the art and are not described herein. An alignment layer is also formed on the side of the second substrate facing the first substrate, and the method for forming the alignment layer on the second substrate may be the same as the method for forming the alignment layer on the first substrate, and is not described herein again.

S12: as shown in fig. 8, the first substrate and the second substrate are aligned with each other, and fig. 8 is a schematic structural view of the display device after the first substrate and the second substrate are aligned with each other. As shown in fig. 8, the first base plate 11 is formed on the hard substrate 100, and the first base plate 11 is provided with the first binding region, so that the first base plate 11 protrudes from the second base plate 12. In one embodiment, the first substrate 11 and the second substrate 12 may be aligned in a cassette by ODF (bonding the first substrate and the second substrate through a glue frame).

In actual production, a first substrate mother board (with a hard substrate) and a second substrate mother board are paired with each other to form a cassette, the first substrate mother board includes a plurality of first substrates, and the second substrate mother board includes a plurality of second substrates. After the first substrate mother board and the second substrate mother board are aligned to each other, cutting equipment (such as a knife wheel) is needed to perform first cutting on the mother board after aligning, and the mother board is cut into a Panel unit (Q-Panel); the Q-Panel is then cut a second time using a cutting device (e.g., a knife wheel or laser cut) to form a Single Panel (Single Cell). Since the first bonding region is disposed on the first substrate, a portion of the second substrate covering the first bonding region is cut off in the second cutting, so that the size of the first substrate is different from that of the second substrate in a single panel, and generally, the size of the first substrate is larger than that of the second substrate, that is, the first bonding region on the first substrate protrudes out of the second substrate, as shown in fig. 8.

S13: at least the portion of the rigid substrate corresponding to the first binding region is peeled off the first substrate, and in one embodiment, the rigid substrate 100 is entirely peeled off the first substrate 11, i.e., the rigid substrate 100 is separated from the flexible substrate. The hard substrate may be removed by separating the hard substrate from the flexible substrate using a laser lift-off (LLO) technique, as shown in fig. 9, where fig. 9 is a schematic structural view of the display device after the hard substrate is peeled off from the first substrate.

S14: the first polarizer and the second polarizer are attached, specifically, the first polarizer 51 is attached to a side of the first substrate 11 away from the second substrate 12, the second polarizer 52 is attached to a side of the second substrate 12 away from the first substrate 11, the second polarizer 52 may include a 6H polarizer or a 9H polarizer, as shown in fig. 10, and fig. 10 is a schematic structural view after the first polarizer and the second polarizer are attached to the display device. In order to prevent the second polarizer 52 from being attached weakly, the second polarizer 52 may be attached on the side of the second substrate 12 away from the first substrate 11 by using a glue layer 82.

S15: and binding and connecting the first control module to a first binding area of the first substrate, and coating a green oil protective layer to protect the binding pad. Specifically, a chip, a flexible circuit board and the like are subjected to software binding with a first substrate, and the chip, the flexible circuit board and the like are bound and connected to a first binding region; and coating a green oil protective layer on the first binding pad area to protect the binding pad.

S16: and assembling a backlight unit on one side of the first polarizer, which is far away from the first substrate.

S17: the first binding area which is bound with the first control module is bent towards the direction deviating from the second substrate, so that the first control module is hidden at one side of the second substrate, which faces the first substrate, and then the adhesive tape is pasted to cover and protect the first control module.

S18: the integral structure that forms is cut and is made the edge parallel and level of second base plate, first polaroid and second polaroid, then carries out the dysmorphism cutting to whole and makes the size phase-match of integral structure and backplate to realize the equipment of backplate.

In practical implementation, in order to prevent light leakage, it is also necessary to print ink on the periphery of the light-emitting side of the display device to avoid light leakage. Finally, the back plate 71 is assembled on the side of the backlight unit 60 away from the first substrate 11, so that the second polarizer 52 forms the outer surface of the light emitting side of the display device, thereby completing the preparation of the display device.

In another embodiment, the method for manufacturing the display device is different from the previous embodiment in step S13, and in another embodiment, S13 may include: peeling off the part, corresponding to the first binding region, of the hard substrate from the first substrate, specifically, performing laser precutting on the part, corresponding to the first binding region, of the hard substrate; and separating the part of the hard substrate corresponding to the first binding region from the flexible substrate by adopting a laser stripping technology to remove the part of the hard substrate corresponding to the first binding region, so that the first binding region of the first base plate is exposed. In another embodiment, the hard substrate corresponding to the unbound region of the first substrate is still remained, so the second polarizer may be a common polarizer.

The display device manufactured by the manufacturing method of the embodiment of the invention comprises a display area and a frame area positioned outside the display area, and the cross-sectional structure of the display device in the frame area is shown in fig. 6 and fig. 7.

The fourth embodiment:

fig. 11 is a schematic structural diagram of a display device according to a fourth embodiment of the invention. Based on the inventive concept of the foregoing embodiments, a fourth embodiment of the present invention proposes a display device, as shown in fig. 11, including a first panel 10 and a second panel 20 that are stacked. The first panel 10 is typically a display panel and the second panel 20 is typically a local dimming panel. The first panel 10 includes first and

second substrates

11 and 12 provided to the cells, and a first liquid crystal layer 13 provided between the first and

second substrates

11 and 12. The second panel 20 includes a third substrate 21 and a fourth substrate 22 provided to the cell, and a second liquid crystal layer 23 between the third substrate 21 and the fourth substrate 22. The fourth substrate 22 is disposed toward the first substrate 11. Generally, the first substrate may be an array substrate, the second substrate may be a color filter substrate, the third substrate may also be an array substrate, and the fourth substrate may be a color filter substrate.

In this embodiment, the first panel may be a display panel, the second panel may be a local dimming panel, and the second panel is provided with a plurality of dimming units, the dimming units correspond to the pixel units of the first panel one to one, and the dimming units are used for adjusting the brightness of light entering the corresponding pixel units. Since the second substrate is not used for displaying color, a color film is not usually disposed on the fourth substrate.

In order to reduce the thickness and weight of the dual panel display device, at least one of the first substrate 11, the second substrate 12, the third substrate 21, and the fourth substrate 22 employs a flexible base.

It is easily understood that, in the dual panel display device, generally, the first substrate 11, the second substrate 12, the third substrate 21 and the fourth substrate 22 all use glass as a base, which results in more than one time of thickness and weight increase of the dual panel display device compared to the single panel display device, and thus the development of the dual panel display device is seriously affected. In the double-panel display device of the embodiment of the invention, at least one of the first substrate 11, the second substrate 12, the third substrate 21 and the fourth substrate 22 adopts the flexible substrate, the flexible substrate has thin thickness and light weight, the thickness and the weight of the double-panel display device can be effectively reduced, the ultra-light and thin effect is easily realized, the defects of over-thick thickness and over-heavy weight of the double-panel display device are effectively overcome, and the application value and the market competitiveness of the double-panel display device are greatly improved.

In order to further increase the structural strength of the panel corresponding to the substrate using the flexible base, in one embodiment, the panel corresponding to the substrate using the flexible base further includes a 6H polarizer or a 9H polarizer. The 6H polaroid or the 9H polaroid can increase the structural strength of the panel, and the mass production of the display device is easy to realize. For example, the first substrate or the second substrate adopts a flexible substrate, and then the panel corresponding to the first substrate or the second substrate, i.e., the first panel, further includes a 6H polarizer or a 9H polarizer; the third substrate or the fourth substrate adopts a flexible substrate, and then the panel corresponding to the third substrate or the fourth substrate, i.e. the second panel, further includes a 6H polarizer or a 9H polarizer. As shown in fig. 11, the first panel 10 of the display device according to the embodiment of the invention further includes a first polarizer 51 and a second polarizer 52. The first polarizer is disposed on a side of the first substrate 11 facing away from the second substrate 12, and the second polarizer 52 is disposed on a side of the second substrate 12 facing away from the first substrate 11. The second panel 20 further comprises a third polarizer 53, the third polarizer 53 being arranged on a side of the third substrate 21 facing away from the fourth substrate 22.

In the present embodiment, as shown in fig. 11, the first substrate 11 and the second substrate 12 each employ a flexible base, and the third substrate 21 and the fourth substrate 22 each employ a hard base such as glass or the like. The first polarizer 51 includes a 6H polarizer or a 9H polarizer, and the second polarizer 52 may also include a 6H polarizer or a 9H polarizer.

As shown in fig. 11, the display device may further include a backlight unit 60, the backlight unit 60 being disposed at a side of the second panel 20 facing away from the first panel 10. It is to be understood that the backlight unit 60 may include a lamp housing, a backlight source, a reflection plate, a light guide plate, a diffusion plate, and the like.

Compared with the dual panel display device shown in fig. 4, in the display device shown in fig. 11, the thickness of the first panel 10 (from the first polarizer to the second polarizer) is reduced from 0.6mm to 0.2mm, so that the thickness of the dual panel display device is greatly reduced, and the weight of the dual panel display device is greatly reduced.

Fig. 12 is a schematic structural diagram of a display device according to another embodiment of the invention. In the present embodiment, as shown in fig. 12, the third substrate 21 and the fourth substrate 22 each employ a flexible base, and the first substrate 11 and the second substrate 12 each employ a hard base such as glass or the like. The third polarizer 53 may include a 6H polarizer or a 9H polarizer, and the second polarizer 52 may include a 6H polarizer or a 9H polarizer. Compared with the dual panel display device shown in fig. 4, in the display device shown in fig. 12, the thickness of the second panel 20 (including the third polarizer 53, the third substrate 21, the second liquid crystal layer 23, and the fourth substrate 22) is reduced from 0.5mm to 0.1mm, so that the thickness of the dual panel display device is greatly reduced, and the weight of the dual panel display device is greatly reduced.

Fig. 13 is a schematic structural diagram of a display device according to another embodiment of the invention. In this embodiment, as shown in fig. 13, the first substrate 11, the second substrate 12, the third substrate 21, and the fourth substrate 22 all use flexible substrates, and the first polarizer 51, the second polarizer 52, and the third polarizer 53 may all include a 6H polarizer or a 9H polarizer. Compared with the double-panel display device shown in fig. 4, in the display device shown in fig. 13, the thickness of the first panel 10 (from the first polarizer to the second polarizer) is reduced from 0.6mm to 0.2mm, and the thickness of the second panel 20 (including the third polarizer 53, the third substrate 21, the second liquid crystal layer 23 and the fourth substrate 22) is reduced from 0.5mm to 0.1mm, so that the thickness of the double-panel display device is reduced by 0.8mm, and therefore, the thickness of the double-panel display device is greatly reduced, and the weight of the double-panel display device is greatly reduced.

According to the display device provided by the embodiment of the invention, any substrate of the first substrate, the second substrate, the third substrate or the third substrate can be selectively set as the flexible substrate, so that different thicknesses and weights of the display device can be achieved, and different market requirements can be met.

Fig. 14 is a schematic structural view of a double-panel display device. It is easily understood that the dual panel display device includes a display area and a frame area located outside the display area, and in the frame area, the first substrate 11 has a first binding area in the frame area, and the first binding area is bound and connected with the first control module 41. The first control module can comprise a chip, a flexible circuit board, a printed circuit board module and the like. The chip and the flexible circuit board are both bound and connected in the first binding area, and the flexible circuit board is connected with the printed circuit board module. Since the first substrate 11 is a flexible substrate, in order to reduce the width of the frame region of the dual panel display device, as shown in fig. 14, the first binding region may be bent toward a direction away from the second substrate 12, so that the first control module is hidden at a side of the second substrate 12 facing the first substrate 11.

Similarly, in the frame area, the third substrate 21 has a second binding area in the frame area, and the second binding area is bound with the second control module 42. The second control module 42 may include a chip, a flexible printed circuit board, a printed circuit board module, and the like. The chip and the flexible circuit board are both bound and connected in the second binding area, and the flexible circuit board is connected with the printed circuit board module. Since the third substrate 21 is a flexible substrate, in order to reduce the width of the frame region of the dual panel display device, as shown in fig. 14, the second binding region may be bent toward a direction away from the fourth substrate 12, so that the second control module is hidden at a side of the fourth substrate 22 facing the third substrate 21.

Therefore, as shown in fig. 14, the first bonding area and the second bonding area no longer occupy the dimension parallel to the substrate, so that the width of the frame area of the display device is effectively reduced, which is beneficial to realizing the narrow frame and the frameless frame of the double-panel display device.

As shown in fig. 14, the double-panel display device further includes a back sheet 71, and the back sheet 71 is disposed on a side of the backlight unit 60 facing away from the third polarizer 53. In fig. 14, the second polarizer 52 may include a 6H polarizer or a 9H polarizer. The 6H polaroid or the 9H polaroid has better hardness and rigidity and can replace a cover plate of the display device, so that the second polaroid 52 and the back plate 71 form a frame structure of the display device, the use of the cover plate is omitted, and the cost of the display device is reduced.

It is easy to understand that, as long as the first substrate and the third substrate are both made of flexible substrates, the first bound region can be bent toward a direction away from the second substrate 12, so that the first control module is hidden at a side of the second substrate 12 toward the first substrate 11, and the second bound region is bent toward a direction away from the fourth substrate 12, so that the second control module is hidden at a side of the fourth substrate 22 toward the third substrate 21. Therefore, the narrow frame design of the display device is realized, and the light and thin structure, the narrow frame and even no frame of the double-panel display device are favorably realized.

It is easily understood that, in the display device according to the embodiment of the present invention, the first panel may be a High Advanced Super Dimension Switch (HADS) liquid crystal panel. The second panel may be a High multidimensional Super Dimension Switch (HADS) liquid crystal panel or a Twisted Nematic (TN) liquid crystal panel.

The following describes a method for manufacturing a display device according to an embodiment of the present invention, using a double-panel display device shown in fig. 14.

S100: preparing a first panel and a second panel, specifically comprising:

s101: preparing a first panel comprising:

s, 1011: a first substrate, typically an array substrate, and a second substrate, typically a color filter substrate, are prepared.

The method for preparing the first substrate is the same as that of the third embodiment, and is not repeated herein.

Preparing the second substrate may include: coating a layer of flexible material on the hard substrate, wherein the flexible material can be polyimide and other materials; the flexible material is solidified into a film to form a flexible substrate, and the flexible material can be solidified into a film through a hot disc vacuum drying device (HVCD) and a sintering or baking method; preparing a color film structure layer on a flexible substrate, wherein the color film structure layer can comprise a color film and a black matrix; and forming an orientation layer on the color film structure layer. The process of forming the alignment layer may include: coating an orientation liquid (such as a polyimide solution) on the color film structure layer and curing to form a film; the alignment film is subjected to an alignment treatment (e.g., a Rubbing or OA process) to form an alignment layer.

S1012: the first substrate and the second substrate are aligned to a cassette. The procedure of the first substrate and the second substrate aligning cassette is the same as S12 in the third embodiment, and is not described again.

It is easily understood that the first base plate and the second base plate are respectively disposed on the corresponding hard substrates in the cartridge process.

S1013: and peeling the hard substrate corresponding to the first base plate from the first base plate, and peeling the hard substrate corresponding to the second base plate from the first base plate. The hard substrate may be removed by separating the hard substrate from the base plate using a laser lift-off technique.

S1014: the first polarizer and the second polarizer are attached, specifically, the first polarizer 51 is attached to one side of the first substrate 11 departing from the second substrate 12, the second polarizer 52 is attached to one side of the second substrate 12 departing from the first substrate 11, and both the first polarizer and the second polarizer may include a 6H polarizer and a 9H polarizer.

S1015: and binding and connecting the first control module to a first binding area of the first substrate, and coating a green oil protective layer to protect the binding pad. Specifically, a chip, a flexible circuit board and the like are subjected to software binding with a first substrate, and the chip, the flexible circuit board and the like are bound and connected to a first binding region; and coating a green oil protective layer on the first binding pad area to protect the binding pad.

S102: preparing a second panel comprising:

s1021: a third substrate, typically an array substrate, and a fourth substrate, typically a transparent substrate, are prepared.

The method for preparing the third substrate is the same as the method for preparing the first substrate in S1011, and is not described herein again.

Preparing the fourth substrate may include: coating a layer of flexible material on the hard substrate, wherein the flexible material can be polyimide and other materials; the flexible material is solidified into a film to form a flexible substrate, and the flexible material can be solidified into a film through a hot disc vacuum drying device (HVCD) and a sintering or baking method; an alignment layer is formed on a flexible substrate.

S1022: and the third substrate and the fourth substrate are paired with each other. The process of aligning the third substrate and the fourth substrate to the cassette is the same as S1012, and is not described again.

It is easily understood that the third base plate and the fourth base plate are respectively disposed on the corresponding hard substrates in the cartridge process.

S1023: and peeling the hard substrate corresponding to the third base plate from the third base plate, and peeling the hard substrate corresponding to the fourth base plate from the fourth base plate. The hard substrate may be removed by separating the hard substrate from the base plate using a laser lift-off technique.

S1024: and attaching a third polarizer, specifically, attaching the third polarizer to the side of the third substrate departing from the fourth substrate, wherein the third polarizer comprises a 6H polarizer and a 9H polarizer.

S200: the first panel and the second panel are attached to face the fourth substrate 22 toward the first polarizer 51, and specifically, an Optical Clear Adhesive (OCA) process may be used to attach the first panel and the second panel to face the fourth substrate 22 toward the first polarizer 51, as shown in fig. 11.

S300: and assembling the backlight unit, wherein the backlight unit is arranged on the side of the second panel, which is away from the first panel.

S400: bending a first binding area in binding connection with the first control module 41 towards a direction departing from the second substrate 12, so that the first control module 41 is hidden at one side of the second substrate 12 facing the first substrate 11, and then pasting an adhesive tape to cover and protect the first control module 41; the second binding area to which the second control module 42 is bound is bent towards a direction away from the fourth substrate 22, so that the second control module 42 is hidden at one side of the fourth substrate 22 towards the third substrate 21, and then the adhesive tape is pasted to cover and protect the second control module 42.

S500: the integral structure to form cuts the edge parallel and level that makes first panel and second panel, then carries out the dysmorphism cutting to integral structure and makes the size phase-match of integral structure and backplate to realize the equipment of backplate.

In practical implementation, in order to prevent light leakage, it is necessary to print ink on the periphery of the light-emitting side of the display device to avoid light leakage, and finally, the back plate 71 is assembled on the side of the backlight unit 60 away from the second panel 20, so that the second polarizer 52 forms the outer surface of the light-emitting side of the display device, and the preparation of the display device is completed, as shown in fig. 14.

In the description of the embodiments of the present invention, it should be understood that the terms "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A display device is characterized by comprising a first panel, wherein the first panel comprises a first substrate and a second substrate which are arranged opposite to each other, and at least one of the first substrate and the second substrate adopts a flexible substrate.

2. The display device according to claim 1, wherein the first substrate is a flexible substrate, the display device includes a display area and a frame area outside the display area, the first substrate has a first binding region in the frame area, the first binding region is bound and connected with a first control module, and the first binding region of the first substrate is bent in a direction away from the second substrate, so that the first control module is hidden on a side of the second substrate facing the first substrate.

3. The display device according to claim 2, wherein the first panel further comprises a first polarizing plate provided on a side of the first substrate facing away from the second substrate, and a second polarizing plate provided on a side of the second substrate facing away from the first substrate, and wherein the display device further comprises a backlight unit provided on a side of the first panel facing the first substrate.

4. The display device according to claim 3, wherein the second polarizer comprises a 6H polarizer or a 9H polarizer, the display device further comprising a back plate disposed on a side of the backlight unit facing away from the first panel, the second polarizer forming an outer surface of a light exit side of the display device.

5. The display device according to any one of claims 2 to 4, further comprising a second panel disposed on a side of the first panel facing the first substrate, wherein the second panel comprises a third substrate and a fourth substrate disposed opposite to each other, the fourth substrate faces the first substrate, the third substrate adopts a flexible substrate, the third substrate has a second binding region in a frame region, the second binding region is bound and connected with a second control module, and the second binding region of the third substrate is bent towards a direction away from the fourth substrate, so that the second control module is hidden on a side of the fourth substrate facing the third substrate.

6. The display device according to claim 5, wherein the second substrate or/and the fourth substrate is a flexible substrate.

7. The display device according to claim 5, wherein the first panel comprises a display panel, the second panel comprises a local dimming panel, and the second panel is provided with a plurality of dimming cells in one-to-one correspondence with the pixel cells of the first panel, the dimming cells being configured to adjust brightness of light entering the corresponding pixel cells.

8. The display device according to claim 5, wherein the first panel further comprises a first polarizer disposed on a side of the first substrate facing away from the second substrate, and a second polarizer disposed on a side of the second substrate facing away from the first substrate, wherein the second panel further comprises a third polarizer disposed on a side of the third substrate facing away from the fourth substrate, and wherein the first polarizer, the second polarizer, and the third polarizer each comprise a 6H polarizer or a 9H polarizer.

9. A method of manufacturing a display device, comprising:

aligning the first substrate and the second substrate to a cassette;

binding and connecting a first control module to the binding area;

10. The production method according to claim 9,

11. The method of manufacturing according to claim 10, further comprising,

12. A method of manufacturing a display device, comprising: