CN202601095U - Flexible display device - Google Patents

Abstract

The utility model discloses a flexible display device, which relates to the field of display technology. The device comprises: a first flexible substrate, a flexible display device formed on the surface of the first flexible substrate; A second flexible substrate on one side of the display device. The flexible display device of the present invention uses an additional flexible substrate (second flexible substrate) to package the flexible display device, especially uses an ultra-thin glass substrate to package the flexible display device formed on the plastic substrate, so that the flexible display device can be used in On the basis of being flexible and bendable, it has better water and oxygen barrier properties and is not easy to break.

Description

Flexible display device

technical field

The utility model relates to the field of display technology, in particular to a flexible display device. the

Background technique

With the development of flexible display technology, flexible display products that are closer to the traditional display mode will soon enter the homes of ordinary people. Due to the unique bendable characteristics of the flexible display itself, it is determined that it will have many special user experiences. the

The display modes and related devices that can realize flexible display mainly include liquid crystal display, organic electroluminescent display, electronic paper, electrophoretic display, touch screen, micro-electro-mechanical systems (Micro-Electro-Mechanical Systems, MEMS), thin-film photovoltaic cells. Among them, organic electroluminescent displays, electronic paper, electrophoretic displays, and thin-film photovoltaic cells are particularly sensitive to water and oxygen, which will cause device performance degradation or failure. the

At present, there are mainly three types of substrates for flexible display devices: plastic, ultra-thin glass, and metal foil. Plastic substrates and substrates made of plastic-like materials have the advantages of being transparent, soft, and not easy to break, but have poor water and oxygen barrier capabilities; ultra-thin glass substrates have transparent, soft, water and oxygen barrier properties after edge laser cutting Superior advantages, but if it is difficult to use laser cutting (easy to chop) after device preparation directly on it, it can only be cut by mechanical cutting, but the edge after mechanical cutting is relatively rough, and the bending performance is greatly reduced ; The metal foil substrate has the advantages of superior water and oxygen barrier properties, but its bending ability is limited and it is opaque. Therefore, there is currently no substrate that can perfectly perform the function of a flexible display substrate. the

Utility model content

(1) Technical problems to be solved

The technical problem to be solved by the utility model is: how to make the flexible display device have better water and oxygen barrier properties and not easy to be damaged on the basis of maintaining flexibility and bendability. Specifically, it is to solve how to make the flexible display device formed on the plastic substrate and the substrate formed by similar plastic materials have better water and oxygen barrier performance. the

(2) Technical plan

In order to solve the above technical problems, the utility model provides a flexible display device, including: a first flexible substrate, a flexible display device formed on the surface of the first flexible substrate, and also includes: The second flexible substrate on one side of the flexible display device. the

Wherein, a third flexible substrate located on the surface of the flexible display device is also included. the

Wherein, the third flexible substrate includes: a glass substrate, a single-layer substrate of metal foil, or one of the two, or a multi-layer substrate laminated together. the

Wherein, it also includes a third flexible substrate located between the third flexible substrate and the flexible display device, or located between two layers of the third flexible substrate, or located on the third flexible substrate away from the outermost surface of the flexible display device. An antistatic layer. the

Wherein, the second flexible substrate includes: a glass substrate, a single-layer substrate of metal foil, or one of the two, or a multi-layer substrate laminated together. the

Wherein, it also includes between the first flexible substrate and the second flexible substrate, or between the two layers of the second flexible substrate, or on the second flexible substrate away from the first flexible substrate. A second antistatic layer on the outer surface. the

Wherein, the glass substrate is a glass substrate with a smooth edge and a thickness less than or equal to 0.1 mm. the

Wherein, the first flexible substrate includes: a plastic substrate. the

Wherein, the material of the plastic substrate includes: polycarbonate, polyethylene terephthalate, polyimide, polyarylate, polyethersulfone, polyethylene naphthalate or fiber reinforced plastics One or a combination of two or more. the

Wherein, the flexible display device includes: one or a combination of two or more of liquid crystal display, organic electroluminescent display, electronic paper, electrophoretic display, touch screen, MEMS, and thin-film photovoltaic cell. the

Wherein, it also includes: a driving circuit for driving the flexible display device directly formed on the periphery of the display area of the flexible display device on the first flexible substrate, or a driving circuit attached to the first flexible substrate The external driving circuit of the flexible display device. the

(3) Beneficial effects

The utility model uses an additional flexible substrate (second flexible substrate) to package the flexible display device, especially uses an ultra-thin glass substrate to package the flexible display device formed on the plastic substrate, so that the flexible display device can be kept flexible and bendable. It has better water and oxygen barrier properties and is not easy to break. the

Description of drawings

Fig. 1 is a schematic structural view of a flexible display device according to Embodiment 1 of the utility model;

Fig. 2 is a flow chart of a typical manufacturing method for making a flexible display device in Fig. 1;

Fig. 3 is a schematic structural diagram of a flexible display device according to Embodiment 2 of the present invention;

Fig. 4 is a schematic structural diagram of a flexible display device according to Embodiment 3 of the present invention;

Fig. 5 is a schematic structural diagram of a flexible display device according to Embodiment 4 of the present utility model;

Fig. 6 is a structural schematic diagram of a flexible display device according to Embodiment 5 of the present utility model;

Fig. 7 is a flow chart of a typical manufacturing method for making a flexible display device in Fig. 6;

FIG. 8 is a schematic structural diagram of another flexible display device according to Embodiment 5 of the present invention. the

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the utility model is described in further detail. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model. the

Example 1

As shown in Figure 1, the flexible display device of this embodiment includes: a plastic substrate 1, a flexible display device 2 formed on the surface of the plastic substrate 1, and also includes: a glass substrate 3 located on the side of the plastic substrate 1 away from the flexible display device 2 . Among them, the glass substrate 3 in the utility model is an ultra-thin glass substrate, specifically refers to a glass substrate with a thickness less than or equal to 0.1mm. The edge is laser cut to obtain a smooth edge, so that the glass substrate 3 has the performance of not being damaged after conventional bending. the

Further, the flexible display device of this embodiment further includes a driving circuit (not shown in the figure) for driving the flexible display device. The driving circuit may be a driving circuit directly formed around the display area of the flexible display device 2 on the plastic substrate 1 to drive the flexible display device 2, similar to the current GOA (Gate Driver on Array) mode , the difference is that all the drive circuits (such as data line drive, gate drive, etc.) for driving the flexible display device 2 in this embodiment are integrated on the plastic substrate 1 (it can be produced together when the flexible display device is produced) . The drive circuit can also be an external drive circuit attached to the plastic substrate 1 to drive the flexible display device 2 (that is, the traditional attachment method); of course, the attachment of the external drive circuit in this embodiment The driving circuit can be attached to all the driving circuits, or it can be attached to a part of the driving circuit and the other part of the driving circuit is directly integrated on the flexible display device 2 (taking the flexible liquid crystal display as an example, only the data line driver can be attached, and the other part of the driving circuit can be directly integrated on the flexible display device 2. The gate drive is formed on the flexible display device 2 in GOA mode). the

The flexible display device 2 of the embodiment of the present utility model includes: one or more combinations of liquid crystal display, organic electroluminescent display, electronic paper, electrophoretic display, touch screen, MEMS, and thin-film photovoltaic cell, that is, the same flexible display The device may include two or more of the above display devices to jointly realize display. The material of the plastic substrate 1 includes one or both of polycarbonate, polyethylene terephthalate, polyimide, polyarylate, polyethersulfone, polyethylene naphthalate or fiber-reinforced plastics. more than one combination. the

The manufacturing process of a typical manufacturing method of the flexible display device of this embodiment is shown in Figure 2, including:

Step S1 , first fabricating the flexible display device 2 on the plastic substrate 1 , specifically forming the flexible display device 2 on the plastic substrate 1 by repeated thin film deposition, mask exposure, etching or continuous printing. This step utilizes the characteristic that the plastic substrate 1 is not easily damaged to achieve a high yield rate during the preparation of the flexible display device 2 . According to the different shapes of the plastic substrate 1, it can be produced in a roll-to-roll (roll to roll) manner, and can also be processed and produced by a single plastic substrate (sheet by sheet). If the roll-to-roll processing method is adopted, the production capacity can be greatly increased, thereby reducing the production cost, which is also a difficult processing method for conventional glass and metal foil. the

Step S2 , attaching a driving circuit on the flexible display device 2 , the driving circuit is used to drive the flexible display device 2 to display. the

Step S3 , attaching the side of the plastic substrate 1 with the flexible display device 2 facing away from the flexible display device 2 on the glass substrate 3 . the

It should be noted that the above manufacturing process of the flexible display device is only for the case that the driving circuit is not integrated on the flexible display device, and the order of step S2 and step S3 can be reversed. For the case where the driving circuit is integrated on the flexible display device, the process of attaching the driving circuit can be omitted, that is, step S2 can be omitted (of course, the driving circuit needs to be manufactured together with the flexible display device). the

Specifically, the following two methods (one of which can be selected) can be used to attach the plastic substrate 1 to the glass substrate 3 . the

1. Attach the plastic substrate 1 with the flexible display device 2 on the glass substrate 3 with an adhesive. The adhesive can firmly adhere the plastic substrate 1 to the glass substrate 3 . Specifically, a laminating machine is used to attach the plastic substrate 1 and the glass substrate 3. In order to prevent the adhesive from contaminating the press roller of the laminating machine, thereby affecting the smoothness of subsequent attached products, it is preferable to close the press roller during the attaching process. Place several sheets of plastic film or paper in place. After the attaching process is completed, the protective plastic film or paper is removed to carry out subsequent processes. This improves the yield rate and product performance stability of the continuous attaching process of the flexible display device. the

2. The plastic substrate 1 is tightly pressed on the glass substrate 3 by atmospheric pressure, which saves materials compared with the first method. the

In this embodiment, the order of steps S2 and S3 can be exchanged, as long as the connection point between the plastic substrate 1 prepared with the flexible display device 2 and the attached driving circuit is still exposed, and the driving circuit components can be pasted on the plastic substrate 1, the process can be carried out. Attach the drive circuit. the

The flexible display device of this embodiment can realize the encapsulation effect of water and oxygen barrier through the glass substrate, thereby improving the reliability of the product. Through the characteristics of plastic substrates that are not easily damaged, high production capacity and high yield rate in the production process of flexible display devices are realized. Since the flexible display device is made on the plastic substrate, the ultra-thin glass substrate is not mechanically cut after laser cutting, so the ultra-thin glass substrate maintains excellent bending ability, which also makes the bending characteristics of the final flexible display product unaffected . Since the thickness of the glass substrate is very thin, the weight of the product is very small, and the portability of the product is not affected. the

Example 2

In order to achieve better encapsulation and better water and oxygen barrier, on the basis of Embodiment 1, a glass substrate is attached to the other side of the plastic substrate 1 , that is, the surface of the flexible display device 2 . As shown in FIG. 3 , the surface of the plastic substrate 1 away from the flexible display device 2 is attached to a glass substrate 3 a, and the surface of the flexible display device 2 is attached to a glass substrate 3 b. the

During production, the flexible display device 2 is attached to the glass substrate 3b after step S3, or the surface of the flexible display device 2 is attached to the glass substrate 3b after step S2, and then step S3 is performed, that is, the plastic substrate 1 is separated from the One side of the flexible display device 2 is attached to the glass substrate 3a. The attachment of the flexible display device 2 and the glass substrate 3b can be realized by means of adhesive or atmospheric pressure. the

Compared with Embodiment 1, the flexible display device of this embodiment has better water and oxygen barrier properties due to the protection of an additional layer of glass substrate. the

Example 3

The flexible display device in this embodiment is a flexible display device obtained by replacing the glass substrate 3 in the flexible display device in Embodiment 1 or Embodiment 2 with a metal foil 5, which also achieves better water and oxygen barrier properties. Its preparation process is similar to that of Example 1 or Example 2, and will not be repeated here. FIG. 4 shows a flexible display device in which the glass substrate 3 in the flexible display device in Embodiment 1 is replaced with a metal foil 5 . the

Example 4

The flexible display device in this embodiment is a flexible display device obtained by improving any flexible display device in Embodiments 1-3. Specifically, the two sides of the plastic substrate 1 made of the flexible display device 2 include a multilayer glass substrate and/or metal foil. In addition to the single-layer glass substrate described in the above embodiments, or a single-layer substrate such as a single-layer metal foil, it can also be a multi-layer glass substrate, or a multi-layer metal foil, or a glass substrate and a metal foil. multilayer substrates. the

As shown in FIG. 5 , the figure shows a flexible substrate 10 and a flexible substrate 20 with two layers on both sides of the plastic substrate 1 , wherein the flexible substrate 10 includes a glass substrate 3 a and a metal foil 5 a. The plastic substrate 1 is attached on the metal foil 5a, and the glass substrate 3a is attached on the metal foil 5a. The flexible substrate 20 includes a glass substrate 3b and a metal foil 5b. The surface of the flexible display device 2 is attached to the glass substrate 3b, and the metal foil 5b is attached to the side of the glass substrate 3b away from the flexible display device 2 . the

Its production method includes two ways:

1. First, the flexible substrate 10 and the flexible substrate 20 are manufactured respectively. Then attach the flexible substrate 10 and the flexible substrate 20 on both sides of the plastic substrate 1 respectively. For example, attaching the plastic substrate 1 to the flexible substrate 10 includes two ways:

1. In step S3, the plastic substrate 1 can be attached to one side of the metal foil 5a first, and then the glass substrate 3a is attached to the other side of the metal foil 5a. If more flexible substrates are included, the Attached on the outer surface of the glass substrate 3a (the side away from the plastic substrate 1). the

2. First attach multiple flexible substrates (glass substrate 3a and metal foil 5a) together in sequence to form a flexible substrate 10, and then perform step S3 to attach the plastic substrate 1 on the metal foil 5a. the

The method of attaching the other side of the plastic substrate 1 to the flexible substrate 20 is the same as that of the plastic substrate 1 and the flexible substrate 10 , and will not be repeated here. In addition, the order in which the plastic substrate 1 is first attached to the flexible substrate 10 or the flexible substrate 20 is not limited. the

2. After step S2, a plurality of glass substrates and/or metal foils can be attached to both sides of the plastic substrate 1 with the flexible display device 2 in different orders, that is, glass substrates 3a and 3a are attached to both sides of the plastic substrate 1. The order of 3b and metal foils 5a and 5b is not limited. the

Adhesive or atmospheric pressure can be used for attachment during attachment. the

The flexible display device in this embodiment encapsulates more flexible substrates on the outside of the flexible display device, and has better water and oxygen barrier properties compared with Examples 1-3. the

Example 5

The flexible display device in this embodiment is a flexible display device obtained by adding an antistatic layer to any flexible display device in Embodiments 1-4. The flexible display device in Embodiment 1 is improved as an example for illustration. As shown in Figure 6, it includes: a plastic substrate 1, a flexible display device 2 formed on the surface of the plastic substrate 1, and a driving circuit (not shown in the figure) for driving the flexible display device, and a flexible display device located on the plastic substrate 1 away from the flexible display device. A glass substrate 3 on one side of the device 2 . Wherein, the glass substrate 3 also includes an antistatic layer 4. As shown in FIG. 1 and the glass substrate 3 and the upper surface of the glass substrate 3 are provided with an antistatic layer 4 at the same time. The antistatic layer 4 includes: ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), IGZO (indium gallium zinc oxide), nano-silver, carbon nanotube single-layer film, or a multi-layer film of the above materials. The antistatic layer 4 can better realize electrostatic shielding, so as to achieve better display effect. the

The manufacturing process of a typical manufacturing method of the flexible display device in Figure 6 is shown in Figure 7, which is similar to the manufacturing process in Example 1, except that it also includes step S2.3 before step S3: on the glass substrate 3 Deposit an antistatic layer 4 on the surface facing the plastic substrate 1 . In step S3, the plastic substrate 1 is attached to the glass substrate 3 on which the antistatic layer 4 is deposited. the

It should be noted that the manufacturing process of the flexible display device shown in FIG. 6 is only for the case where the driving circuit is not integrated on the flexible display device, and the order of step S2 and step S3 can be reversed. For the case where the driving circuit is integrated on the flexible display device, the process of attaching the driving circuit can be omitted, that is, step S2 can be omitted (of course, the driving circuit needs to be manufactured together with the flexible display device). the

FIG. 8 shows a flexible display device in which an antistatic layer 4 is provided between the flexible display device 2 and the glass substrate 3b obtained by improving the flexible display device in Example 4. Of course, the antistatic layer 4 can also be located between two or more layers (multiple antistatic layers) and/or on the surface of the flexible substrate on both sides of the plastic substrate 1 on which the flexible display device 2 is fabricated. the

Its production method is as follows:

When the antistatic layer 4 is made between the flexible display device 2 and the flexible substrate 20 (only two layers of flexible substrates are shown in the figure, but not limited to two layers of flexible substrates), if the flexible substrate that is close to the flexible display device 2 ( The antistatic layer 4 is made between the glass substrate 3b) and the flexible display device 2, as long as the antistatic layer 4 is deposited on the glass substrate 3b before the flexible display device 2 is attached to the glass substrate 3b, if the flexible display device 2 When forming the antistatic layer 4 with other layers between the flexible substrate 20 , the order of forming the antistatic layer 4 and the order of attaching the flexible display device 2 to the glass substrate 3 b are not limited. the

When making the antistatic layer 4 between the flexible display device 2 and the flexible substrate 10 (only two layers of flexible substrates are shown in the figure, but not limited to two layers of flexible substrates), if the flexible substrate (metallic substrate) that is close to the plastic substrate 1 Foil 5a) and the plastic substrate 1 to form the antistatic layer 4, as long as the antistatic layer 4 is deposited on the metal foil 5a or the plastic substrate 1 before the flexible display device 2 is attached to the glass substrate 3b. 1 and other layers between the flexible substrate 10, the order of making the antistatic layer 4 and the order of attaching the plastic substrate 1 to the glass substrate 3b are not limited. the

Compared with the flexible display device of any of the embodiments 1 to 4, this embodiment adds an antistatic layer 4, which effectively prevents static electricity generated between the flexible display device 2 and the flexible substrates on both sides thereof, especially Used in a touch-type flexible display device, it avoids bad display effect caused by static electricity generated when fingers are touched. the

The above embodiments are only used to illustrate the utility model, but not to limit the utility model. Those of ordinary skill in the relevant technical fields can also make various changes and modifications without departing from the spirit and scope of the utility model. , so all equivalent technical solutions also belong to the category of the utility model, and the patent protection scope of the utility model should be defined by the claims. the

Claims (11)

1. flexible display apparatus; Comprise: first flexible base, board, be formed at the flexible display device on said first flexible base, board surface; It is characterized in that, also comprise: be positioned at second flexible base, board that deviates from said flexible display device one side on said first flexible base, board.

2. flexible display apparatus as claimed in claim 1 is characterized in that, also comprises the 3rd flexible base, board on the surface that is positioned at said flexible display device.

3. flexible display apparatus as claimed in claim 2 is characterized in that, said the 3rd flexible base, board comprises: one of the single layer substrate of glass substrate, metal forming or both or common range upon range of multilager base plate.

4. flexible display apparatus as claimed in claim 3; It is characterized in that; Also comprise between the 3rd flexible base, board and said flexible display device; Or between said the 3rd flexible base, board is two-layer, or be positioned at first antistatic backing of the outmost surface that deviates from said flexible display device on the 3rd flexible base, board.

5. like each described flexible display apparatus in the claim 1～4, it is characterized in that said second flexible base, board comprises: one of the single layer substrate of glass substrate, metal forming or both or common range upon range of multilager base plate.

6. flexible display apparatus as claimed in claim 5; It is characterized in that; Also comprise between said first flexible base, board and said second flexible base, board; Or between said second flexible base, board is two-layer, or be positioned at second antistatic backing that deviates from the outmost surface of first flexible base, board on said second flexible base, board.

7. flexible display apparatus as claimed in claim 5 is characterized in that, said glass substrate is the entire glass substrate of thickness smaller or equal to 0.1mm.

8. like each described flexible display apparatus in the claim 1～4, it is characterized in that said first flexible base, board comprises: plastic base.

9. flexible display apparatus as claimed in claim 8; It is characterized in that the material of said plastic base comprises: the combination of one or more of polycarbonate, polyethylene terephthalate, polyimide, polyarylate, polyethersulfone, PEN or fiber-reinforced plastic.

10. like each described flexible display apparatus in the claim 1～4; It is characterized in that said flexible display device comprises: the combination of one or more in LCD, display of organic electroluminescence, Electronic Paper, electrophoresis type display, touch-screen, MEMS, the film photovoltaic cell.

11. like each described flexible display apparatus in the claim 1～4; It is characterized in that; Also comprise: the driving circuit of the said flexible display device of driving that directly is formed at the viewing area periphery of said first the above flexible display device of flexible base, board; Perhaps, be attached at the external driving circuit of the said flexible display device of driving on said first flexible base, board.

Images