CN112201760B - Display device and method for manufacturing the same - Google Patents

Referring to fig. 1 to fig. 3, a

100 according to an embodiment of the present disclosure includes a

10 and a

20. The

10 is an organic light emitting diode display panel. The

20 includes, but is not limited to, a front camera, a face recognition sensor, a gesture sensor, and the like.

The

100 may be divided into a

100a, a

100b, and a

100 c. The

100a surrounds the

100 b. The

100c is located between the

100a and the

100 b. In other words, the

100c surrounds the

100b, and the

100a surrounds the

100 c.

The

100a is used for displaying an image. The

100a is provided with a plurality of light-emitting pixels (not shown) and a drive circuit (not shown) for driving the plurality of light-emitting pixels to emit light.

The

100b is used to dispose the

20. The

100b may be formed by forming a through hole or a blind hole in the

100 by laser cutting. In the present embodiment, the

100b is formed of the through hole TH. The shape of the

100b is not limited in the present application, and may be a circle, a square, a triangle, or other polygons.

The

100c is used for water and oxygen blocking between the

100a and the

100 b.

The

10 includes a

11, a

12 disposed on the

11, and a thin

13 covering the

12.

The

11 may be formed of a single-layer flexible substrate, or may be formed of two or more layers of flexible substrates. The material of the flexible substrate is selected from one or more of Polyimide (PI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), Polyarylate (PAR), Polycarbonate (PC), Polyetherimide (PEI) and Polyethersulfone (PES).

The

12 includes an organic

121. The organic

121 is formed using inkjet printing. As the material of the organic

121, organic electroluminescent materials commonly used in the art, such as high molecular or low molecular weight organic photo-or electroluminescent materials, and fluorescent and phosphorescent compounds, may be used. The

12 may also include other elements of an Organic Light Emitting Device (OLED), such as an anode, a cathode, and a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer, etc. The

12 may further include a

122 and a planarization layer (not shown), a passivation layer (not shown), and the like.

The thin

13 includes at least one inorganic layer and at least one organic layer alternately stacked. The inorganic layer may be selected from inorganic materials of alumina, silicon oxide, silicon nitride, silicon oxynitride, silicon carbide, titanium oxide, zirconium oxide, zinc oxide, and the like. The organic layer is an organic material selected from epoxy resin, Polyimide (PI), polyethylene terephthalate (PET), Polycarbonate (PC), Polyethylene (PE), polyacrylate, and the like. Only the first

131, the

132, and the second

133 are illustrated in fig. 3, but the number of inorganic layers and organic layers of the thin

13 of the present application is not limited thereto.

The

11 is provided with a

101 which is undercut. The

101 is disposed in the

100 c. In this embodiment, only one

101 is opened in the

11, but in other embodiments, the number of

101 may be two or more.

In other embodiments of the present application, the structure of the

101 may also be located at other positions of the

100 where water and oxygen barrier is required.

The

101 may have a shape surrounding the through hole TH in a plan view. The

101 may have an undercut shape. The

101 having an undercut shape may be one of an opening, a slit (aperture), and a hole. The

101 having the undercut shape may be formed using a wet etching method or a dry etching method. The

101 has, for example, a semicircular, hexagonal or elliptical cross section. Since the organic

121 is formed on the

11 by inkjet printing, it may be broken at the

101. However, an excessively large taper angle inside the

101 having an undercut shape may affect the quality of an inorganic layer of the thin

13 subsequently formed on the

101. It should be noted that only the organic

121 is disconnected at the

101, although not shown in the figure, other film layers of the

100, such as an inorganic layer and a metal layer, may be continuous at the

101, and may also be removed by patterning.

To solve this problem, an

102 is coated on the inner sidewall of the

101. In one embodiment, the

102 is formed in one turn around the inner sidewall of the

101. In the present embodiment, the

102 completely covers the inner sidewall of the

101. However, the present application does not limit the position of the

102 on the inner sidewall of the

101 as long as the taper angle can be reduced. In another embodiment, the

102 partially covers the inner sidewalls of the

101 or the

102 completely covers the inner sidewalls of the

101 and also covers a portion of the bottom wall of the

101.

The composition and fabrication method of the

102 is not limited in this application. The

102 may be formed by, for example, inkjet printing, coating or filling an organic solution, and forming an organic layer after the organic solution is dried, or by directly forming an organic colloid on the inner wall of the

101.

In one embodiment, the material of the

102 may be an epoxy resin, an acrylate resin, or the like. The

102 is formed on the inner sidewall of the

101 by means of inkjet printing. The organic ink of the

102 used in the inkjet printing process is composed of, for example: epoxy resin, acrylic resin, olefinic resin, and photopolymerization initiator, but are not limited thereto.

In one embodiment, the inner surface of the

101 is formed by a

101a and a

101 b. The

102 is disposed on the

101 b. In one embodiment, the

101b may surround the

101 a. For example, as mentioned above, the

101b may be an inner sidewall of a part or all of the

101, and may also include an inner sidewall and a part of the bottom wall of all of the

101. The

101a may be opposite to the hydrophilic property of the

102. For example, the

101a has hydrophobic properties, and the

102 and the

101a have hydrophilic properties, or vice versa. Further, the

101b may have the same hydrophilic property as the

102.

In one embodiment, the

101a is a hydrophilic flexible substrate formed by performing a plasma hydrophilic treatment on a flexible substrate, or a hydrophobic flexible substrate material formed by performing a plasma hydrophobic treatment on a flexible substrate.

In another embodiment, the

101a may include a hydrophilic coating or a hydrophobic coating formed on the

11. Further, the

101b may also include a coating layer having the same hydrophilic property as the

102.

Further, the inorganic layers of the thin

13, specifically, the first

131 and the second

132 cover the

101, that is, cover the

102 and the

101 a.

Referring to fig. 4, a display device 100' according to a second embodiment of the present application has substantially the same structure as the

100 according to the first embodiment, except that:

the flexible substrate 11' includes a

111 and first and second

112 and 113 disposed at both sides of the

111. The

101' includes a

1011 opening into the first

113 and a

1012 opening into the second

113. The

1011 is in communication with the

1012. The barrier layer protrudes between the

1011 and the

1012. The

102 covers inner sidewalls of the first and

1011 and 1012.

s1: a

11 is provided, and a

101 with an undercut is formed on the

100. The

100 is disposed on the

200, and is peeled off from the

200 after the process is completed.

In the present embodiment, the

11 is formed of a single-layer flexible substrate. In other embodiments, the

11 may be formed of two or more layers of flexible substrates. When the

11 is the flexible substrate 11' shown in fig. 4, a

1011 is formed in the first

113, and a

1012 is formed in the second

113.

S2: an

102 is formed on the inner sidewall of the

101.

The method for forming an

102 on the inner sidewall of the

101 may be, for example, ink-jet printing, or coating or filling an organic solution, forming an organic layer after the organic solution is dried, or directly forming an organic colloid on the inner sidewall of the

101.

In one embodiment, the organic ink of the

102 used in the inkjet printing process is comprised of: epoxy resin, organic olefine acid esters and photopolymerization initiator.

In one embodiment, the

102 is formed in one turn around the inner sidewall of the

101. In the present embodiment, the

102 completely covers the inner sidewall of the

101. However, the present application does not limit the position of the

102 on the inner sidewall of the

101 as long as the taper angle can be reduced. In another embodiment, the

102 partially covers the inner sidewalls of the

101 or the

102 completely covers the inner sidewalls of the

101 and also covers a portion of the bottom wall of the

101.

step S21: the inner surface of the

101 is subjected to hydrophilic or hydrophobic treatment to form a

101a and a

101b having hydrophilic or hydrophobic surfaces. Dropping an

300 having a hydrophilic property opposite to that of the

101a into the

101; an

102 is formed after the

300 is dried in the

101 b. In this step, since the

300 has the opposite hydrophilic property to the

101a, the

300 repels the

101a and flows to the

101 b. The

102 may be simply formed on the inner sidewall of the

101.

In one embodiment, the

101b may surround the

101 a. As described above, the

101b may be an inner sidewall of a part or all of the

101, and may also include an inner sidewall and a part of the bottom wall of all of the

101. In one embodiment, the

101a has a hydrophobic property and the

102 has a hydrophilic property, or vice versa.

Further, the

101b may have the same hydrophilic property as the

102. Step S2 further includes step S22: the inner surface of the

101 is subjected to hydrophilic or hydrophobic treatment to form a

101b having a hydrophilic property opposite to that of the

101 a.

In steps S21 and S22, the method of performing hydrophilic or hydrophobic treatment on the inner surface of the

101 may be performing plasma hydrophilic or plasma hydrophobic treatment on the flexible substrate of the

11, thereby forming a hydrophilic flexible substrate or a hydrophobic flexible substrate. In another embodiment, the inner surface of the

101 may be treated to be hydrophilic or hydrophobic by coating a hydrophilic or hydrophobic coating on the

11.

S3: a

12 is formed on the

11. The

12 includes an organic

121. Among them, the organic

121 is formed on the

11 by inkjet printing. The organic

121 is disconnected at the

101.

Further, the method of manufacturing a display device further includes step S4: a thin

13 is formed on the

12. The structure and material of the thin

13 refer to the above embodiments, and are not described in detail herein. The inorganic layers of the thin

13, specifically, the first

131 and the second

132 cover the

101, i.e., cover the

102 and the

101 a. It should be noted that fig. 5(a) to 5(g) only show the cross-sectional views of the

100c, and reference may be made to fig. 3 for the structures of the

100a and the

100 b.

1. A display device, comprising:

the flexible substrate is provided with an undercut groove, and the inner surface of the groove is composed of a first part and a second part; and

the display function layer is arranged on the flexible substrate and comprises an organic light emitting layer, and the organic light emitting layer is disconnected at the groove;

the inner side wall of the groove is covered with an organic layer, the organic layer is arranged on the second part, and the hydrophilic performance of the first part is opposite to that of the organic layer.

2. The display device according to claim 1, wherein the first portion is a hydrophilic flexible substrate or a hydrophobic flexible substrate which is plasma-treated.

3. The display device according to claim 1, wherein the first portion includes a hydrophilic coating or a hydrophobic coating formed on the flexible substrate.

4. The display device of claim 1, further comprising a thin film encapsulation layer covering the display functional layer, the thin film encapsulation layer comprising at least one inorganic layer, the inorganic layer covering the organic layer and the first portion.

5. The display device according to any one of claims 1 to 4, wherein the flexible substrate includes a barrier layer and a first flexible substrate and a second flexible substrate provided on both sides of the barrier layer,

the groove comprises a first groove arranged in the first flexible substrate and a second groove arranged in the second flexible substrate, the first groove is communicated with the second groove, and an organic layer covers the inner side wall of the first groove and the inner side wall of the second groove.

6. The display device according to claim 1, wherein the display device includes a display area, a photosensitive area, and a peripheral area, the display area surrounds the photosensitive area, the peripheral area is disposed between the display area and the photosensitive area, the photosensitive area is used for disposing a photosensitive element, and the recess is disposed in the peripheral area.

7. A method of manufacturing a display device, comprising the steps of:

providing a flexible substrate, and forming a groove in an undercut shape on the flexible substrate;

carrying out hydrophilic or hydrophobic treatment on the inner surface of the groove to form a first part and a second part with hydrophilicity or hydrophobicity, dripping organic ink with the hydrophilicity opposite to that of the first part into the groove, and drying the organic ink to form an organic layer on the second part;

forming a display function layer on the flexible substrate, the display function layer including an organic light emitting layer, the organic light emitting layer being broken at the groove.

8. The method of manufacturing a display device according to claim 7, wherein the step of forming the first portion and the second portion having hydrophilicity or hydrophobicity by subjecting the inner surface of the groove to a hydrophilic or hydrophobic treatment comprises plasma treatment or coating the flexible substrate with a hydrophilic coating or a hydrophobic coating.