WO2020191875A1

WO2020191875A1 - Display panel and display device

Info

Publication number: WO2020191875A1
Application number: PCT/CN2019/086448
Authority: WO
Inventors: 周思思
Original assignee: 武汉华星光电半导体显示技术有限公司
Priority date: 2019-03-22
Filing date: 2019-05-10
Publication date: 2020-10-01
Also published as: CN110021642A

Abstract

A display panel (100) and a display device, comprising a display region (110), a light-transmitting region (130), and an annular region (120); the display region (110) surrounds the annular region (120), and the annular region (120) surrounds the light-transmitting region (130); the display region (110) comprises a substrate (101), a first inorganic layer (102) disposed on the substrate (101), an organic stacked layer (103) disposed at a side of the inorganic layer (102) away from the substrate (101), an organic light-emitting layer (104) disposed at a side of the organic stacked layer (103) away from the inorganic layer (102), and a thin film packaging layer (105) disposed at a side of the organic light-emitting layer (104) away from the organic stacked layer (103); the light-transmitting region (130) penetrates through the display panel (100), and the annular region (120) is formed on the first inorganic layer (102) and is covered by the thin film packaging layer (105).

Description

Display panel and display device

Technical field

The present invention relates to the field of liquid crystal display technology, in particular to a display panel and a display device.

Background technique

The rapid development of display panels at this stage, and the emergence of various screen technologies provide unlimited possibilities for electronic terminals. Especially the rapid application of display technology represented by OLED (Organic Light Emitting Diode), a variety of mobile terminals with "full screen", "shaped screen", "under-screen voice", "under-screen fingerprint", etc. as selling points began to quickly Promotion.

In order to increase the screen-to-body ratio of electronic products, the non-display area on the display panel is compressed smaller and smaller. Generally, in order to achieve a full-screen proposal, a light-transmitting area is provided in the display area of the display panel to transmit light. When making the light-transmitting area, it is necessary to dig holes in the display panel. Then, during cutting, the side of the organic light emitting diode device layer will be exposed to the air, and water and oxygen in the air will penetrate from the side of the organic light emitting diode device layer, causing the packaging of the display panel to fail.

Therefore, it is necessary to provide a new display panel and display device to improve the packaging effect of the under-screen camera OLED display panel and solve the problem of display panel packaging failure in the prior art.

Summary of the invention

technical problem

The purpose of the present invention is to provide a display panel and a display device, which are provided with at least one ring-shaped area to isolate the display area from the light-transmitting area, thereby improving the packaging effect of the display panel; at the same time, the ring-shaped area is provided, and also The contact area of the thin-film encapsulation layer around the light-transmitting area can be increased to further improve the encapsulation effect of the display panel.

The solution to the problem

Technical solutions

In order to solve the above technical problems, the present invention provides a display panel including a display area, a light-transmitting area, and an annular area, the display area surrounds the annular area, the annular area surrounds the light-transmitting area, and the display area It includes: a substrate; a first inorganic layer arranged on the substrate; an organic laminate layer arranged on the side of the inorganic layer away from the substrate; an organic light emitting layer arranged on the organic laminate layer away from the inorganic layer The thin film encapsulation layer is provided on the side of the organic light-emitting layer away from the organic laminate; wherein the light-transmitting area can allow light to penetrate the display panel; the ring-shaped area is formed on the On the first inorganic layer and covered by the thin film encapsulation layer.

Further, in the annular zone, the first inorganic layer is provided with at least one groove, and the groove is directly covered by the thin film encapsulation layer.

Further, in the annular area, the first inorganic layer is formed with at least one dam, the dam is located on one side of the groove and close to the light-transmitting area, and the thin film encapsulation layer covers the dam .

Further, the thin film encapsulation layer includes: a second inorganic layer disposed on the side of the organic light emitting layer away from the organic stack; a first organic layer disposed on the second inorganic layer away from the organic light emitting layer One side of the layer; the third inorganic layer is provided on the side of the first organic layer away from the second inorganic layer.

Further, the light-transmitting area is a through hole that penetrates the display panel; the organic stack includes at least three second organic layers.

Further, the second inorganic layer and the third inorganic layer are sequentially formed on the dam.

Further, in the annular zone, the first inorganic layer is further provided with another groove and another dam, and the second inorganic layer is sequentially formed on the other groove and the other dam. Layer and the third inorganic layer.

Further, the cross section of the groove is a trapezoid with a narrow top and a wide bottom; the groove includes a groove bottom and a peripheral wall surrounding the groove bottom; the distance between the groove bottom and the substrate is 10 nm to 500 nm; The through hole is a cylinder with a side wall; the shortest distance from the groove to the side wall is 10um-200um.

Further, the second inorganic layer and the third inorganic layer are formed by a vapor deposition method; the first organic layer is formed by an inkjet printing method to form the first inorganic layer, the second inorganic layer, and the third inorganic layer. The material of the inorganic layer is silicon oxide with a barrier to water and oxygen.

The present invention provides a display device including the display panel, and the display device further includes a camera module, and the camera module is arranged under the light-transmitting area.

The beneficial effects of the invention

Beneficial effect

The present invention provides a display panel and a display device, which are provided with at least one ring-shaped area to isolate the display area from the light-transmitting area, thereby improving the packaging effect of the display panel; at the same time, providing the ring-shaped area can also reduce the light-transmitting area. The contact area of the thin-film encapsulation layer is increased to further improve the encapsulation effect of the display panel, thereby increasing the service life of the display panel.

Brief description of the drawings

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

Figure 1 is a top view of a display panel of the present invention;

2 is a schematic structural diagram of an embodiment of a display panel of the present invention;

FIG. 3 is a partial structural diagram of another embodiment of the display panel of the present invention.

Invention embodiment

detailed description

The following is the description of each embodiment with reference to the attached drawings to illustrate specific embodiments in which the present invention can be implemented. The terms of direction mentioned in the present invention, such as up, down, front, back, left, right, inside, outside, side, etc., are only directions with reference to the drawings. The component names mentioned in the present invention, such as first, second, etc., only distinguish different components and can be better expressed. In the figures, units with similar structures are indicated by the same reference numerals.

The embodiments of the present invention will be described in detail herein with reference to the accompanying drawings. The present invention can be manifested in many different forms, and the present invention should not only be interpreted as the specific embodiments set forth herein. The embodiments of the present invention are provided to explain the practical application of the present invention, so that other skilled in the art can understand various embodiments of the present invention and various modifications suitable for specific anticipated applications.

As shown in FIG. 1, the present invention provides a display panel 100. In this embodiment, the display panel 100 includes a display area 110, a transparent area 130 and an annular area 120. The display area 110 surrounds the annular area 120, and the annular area 120 surrounds the transparent area 130.

The display area 110 is used for screen display, and the light-transmitting area 130 can allow external light to pass through the display panel 100, thereby facilitating light collection by the camera module 140. The annular area 120 isolates the display area 110 and the light-transmitting area 130, thereby improving the packaging effect of the display panel 100.

As shown in FIG. 2, the display area 110 includes: a substrate 101, a first inorganic layer 102, an organic stack 103, an organic light emitting layer 104 and a thin film encapsulation layer 105.

A TFT device layer (not shown) is formed between the substrate 101 and the organic stack 103, and the TFT device layer includes TFT devices and metal traces to form a pixel drive for controlling the light emission of the organic light emitting layer 104 In the circuit, the TFT device layer usually includes a plurality of insulating layers. The TFT device layer and the substrate 101 further include a buffer layer and/or a barrier layer, and the buffer layer or the barrier layer is silicon oxide or silicon nitride that can block water and oxygen, and is formed by a vapor deposition method.

The substrate 101 is a flexible substrate, and the material of the substrate 101 is polyimide. The substrate 101 can be made of polyimide material to have flexibility.

The first inorganic layer 102 includes one or more of the buffer layer, barrier layer, and insulating layer.

The organic stack 103 is disposed on a side of the first inorganic layer 102 away from the substrate 101; the organic stack 103 may include at least two second organic layers 1031, and the second organic layer 1031 may be The flat layer and the pixel definition layer located above the TFT device layer. In other embodiments, the TFT device layer includes an organic insulating layer, and the organic stack 103 may also include one or more organic insulating layers in the TFT device layer.

The organic light-emitting layer 104 is disposed on the side of the organic stack 103 away from the first inorganic layer 102.

The organic light-emitting layer 104 may be a film layer formed of organic materials in an OLED device layer. The OLED device layer specifically includes an anode, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, and a cathode. The corresponding organic light emitting layer 104 includes a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer.

The hole injection layer covers the anode; the hole transport layer covers the side of the hole injection layer away from the anode; the light-emitting layer covers the hole transport layer away from the anode; One side of the hole transport layer; the electron transport layer covers the side of the light emitting layer away from the hole transport layer; the electron injection layer covers the side of the electron transport layer away from the light emitting layer The cathode covers the side of the electron injection layer away from the electron transport layer.

The organic light emitting layer 104 includes a red pixel unit, a green pixel unit, and a blue pixel unit. Generally, each pixel of the display panel 100 is selected from one color unit of a red pixel unit, a green pixel unit and a blue pixel unit. And the color unit between adjacent pixels is different.

The thin-film encapsulation layer 105 is provided on the side of the organic light-emitting layer 104 away from the organic stack 103; the thin-film encapsulation layer 105 is used to protect the devices of the display panel 100 from the influence of water and oxygen, thereby extending The service life of the display panel 100.

The thin film encapsulation layer 105 includes: a second inorganic layer 1051, a first organic layer 1052, and a third inorganic layer 1053.

The second inorganic layer 1051 is disposed on the side of the organic light-emitting layer 104 away from the organic stack 103; the material of the second inorganic layer 1051 is silicon oxide with water and oxygen barrier; the second inorganic layer 1051 Manufactured by vapor deposition.

The first organic layer 1052 is disposed on a side of the second inorganic layer 1051 away from the organic light-emitting layer 104; the second inorganic layer 1051 is prepared by an inkjet printing method.

The third inorganic layer 1053 is disposed on the side of the first organic layer 1052 away from the second inorganic layer 1051. The material of the third inorganic layer 1053 is silicon oxide with barrier water and oxygen; the third inorganic layer 1053 is made by vapor deposition.

In this embodiment, the light-transmitting area 130 is a through hole 1301 that penetrates the entire display panel 100; the through-hole 1301 is a cylinder with a side wall; the light-transmitting area 130 is used for The penetration of external light facilitates the collection of the camera module 140 of the display device, and can make the collection effect better.

The distance between the groove 1201 and the side wall is 10um-200um. The optimal value is 50 nm, and it can also be 20 nm, 30 nm, 60 nm or 80 nm. In fact, the distance between the groove 1201 and the side wall is the width of the gap area of the present invention. The longer the width of the gap area, the better the packaging effect of the present invention.

In the annular region 120, the first inorganic layer 102 is provided with at least one groove 1201.

The organic stack 103 and the organic light-emitting layer 104 are removed in the groove 1201, and the thin film encapsulation layer 105 directly covers the groove 1201. Therefore, it can be seen from FIG. 2 that the layered structure from the display area 110 to the annular area 120 has a ramp shape.

Specifically, when preparing the display panel 100, after the organic light-emitting layer 104 is vapor-deposited, the organic light-emitting layer 104 in and around the through hole 1301 is removed by laser etching; The organic light-emitting layer 104 and the organic stack 103 in the display area are reserved for the display of the display panel 100; therefore, in FIG. 2, the organic light-emitting layer 104 and the organic stack 103 are disconnected.

During etching, the organic stack 103 forms a slope 1032, and the organic light-emitting layer 104 is attached to the organic stack 103 and attached to the first inorganic layer 102 along the slope 1032 , The organic light emitting layer 104 does not reach the groove 1201. Next, a thin film encapsulation layer 105 is fabricated. Since the organic light-emitting layer 104 is separated from the through hole 1301, the organic light-emitting layer 104 can be well protected.

The groove 1201 includes a groove bottom and a peripheral wall surrounding the groove bottom; the distance from the groove bottom to the substrate 101 is 10 nm to 500 nm. The most preferred is 200nm, and it can also be 50nm, 100nm, 250nm or 450nm.

The cross section of the groove 1201 is trapezoidal, with a narrow top and a wide bottom. Specifically, the trapezoid has an upper base and a lower base; the length of the lower base is greater than the length of the lower base. Since the bottom bottom is directly in contact with the encapsulation layer, the length of the bottom bottom is set to be longer, mainly to increase the area of the encapsulation layer, which can further improve the protection of the organic light emitting layer 104 of the present invention.

In the annular area 120, the first inorganic layer 102 is formed with at least one dam 1202, and the dam 1202 is located on one side of the groove 1201 and close to the light transmission area 130. That is, the dam 1202 is located on the side of the groove 1201 close to the light-transmitting area 130. The thin film encapsulation layer 105 covers the dam 1202.

Because the groove 1201 and the dam 1202 are provided in the first inorganic layer 102 of the annular region 120. Therefore, when the first organic layer 1052 is in inkjet printing, the groove 1201 structure and the dam 1202 form a retaining wall structure, which can effectively block the first organic layer during inkjet printing. 1052's flow. In particular, the flow of the first organic layer 1052 to the through hole is effectively blocked, thereby achieving the purpose of precision packaging.

The second inorganic layer 1051 and the third inorganic layer 1053 are further formed on the dam 1202 in sequence.

The layered structure of the annular region 120 does not form the organic light emitting layer 104, but directly provides the thin film encapsulation layer 105; and the first inorganic layer 102 and the second inorganic layer are provided on the dam 1202 1051 and the third inorganic layer 1053. Therefore, the present invention can increase the packaging area and improve the packaging effect.

On the dam 1202, the first inorganic layer 102, the second inorganic layer 1051, and the third inorganic layer 1053 are in close contact with each other to further prevent water and oxygen from affecting the organic light-emitting layer of the display panel 100 104.

Moreover, the structure of the thin film encapsulation layer 105 on the dam 1202 directly increases the area of the encapsulation layer to the display panel 100 of the present invention, improves the encapsulation effect of the display panel 100, and prevents the light-transmitting area The water and oxygen of 130 affect the display panel 100, thereby prolonging the service life of the display panel 100.

When preparing the dam 1202, it is prepared together with the groove 1201, and the first inorganic layer 102 is thinned to form a dam 1202.

When preparing the thin film encapsulation layer 105, the second inorganic layer 1051 covers the entire display panel 100, that is, from the organic light emitting layer 104 of the display area 110 to the first inorganic layer 102 around the through hole 1301, That is, the groove 1201 and the dam 1301 covering the display area 100 and the annular area 120.

The first organic layer 1052 covers the groove 1201 from the display area 110, and the second inorganic layer 1051 is attached along the direction of the slope 1032 at the break, and fills the groove 1201. Due to the blocking effect of the dam 1201, the first organic layer 1052 can be prevented from overflowing during preparation.

The third inorganic layer 1053 is attached to the first organic layer 1052 and the second inorganic layer 1051 on the dam 1202.

In order to effectively increase the area of the package, the dam 1202 can be provided with slots, that is, slots are opened on the first inorganic layer 102, which can further increase the area of the package layer and improve the package effect of the present invention. .

As shown in FIG. 3, in another embodiment, in order to more effectively enhance the packaging effect of the display panel 100 of the present invention, another groove 1201a is further formed on the dam 1202. Specifically, another groove 1201a is provided on the first inorganic layer 102, which can further increase the area of the packaging layer and improve the packaging effect of the present invention.

Of course, the embodiment shown in FIG. 3 can also be understood in this way. Another groove 1201a and another dam 1202a are further formed on the dam 1202, so that the annular area 120 has two

grooves

1201, 1201a and two

Dams

1202, 1202a. Wherein, the second inorganic layer 1051 and the third inorganic layer 1053 are formed on the other groove 1201a and the other dam 1202a.

It can be seen that the display panel 100 of the present invention can change the number of grooves and dams of the annular area 120 according to the needs of implementation.

The present invention also provides a display device, including the display panel 100 and a camera module 140, and the camera module 140 is disposed under the light-transmitting area 130.

The display panel 100 includes a display area 110, a light-transmitting area 130 and an annular area 120. The display area 110 surrounds the annular area 120, and the annular area 120 surrounds the transparent area 130.

The display area 110 is used for screen display, and the light-transmitting area 130 is used to allow external light to pass through, so as to facilitate the camera module 140 to collect light.

In the annular region 120, the first inorganic layer 102 is provided with at least one groove 1201 and at least one dam 1202. The thin film encapsulation layer 105 directly covers the groove 1201. The cross section of the groove 1201 is trapezoidal, and the trapezoid has an upper bottom and a lower bottom; the length of the lower bottom is greater than the length of the lower bottom. Since the bottom bottom is directly in contact with the encapsulation layer, setting the length of the bottom bottom mainly increases the area of the encapsulation layer, which can improve the packaging effect of the present invention.

Moreover, the encapsulation layer structure on the dam 1202 directly increases the encapsulation area of the display panel 100 according to the present invention, improves the encapsulation effect of the display panel 100, and further extends the service life of the display panel 100.

The technical scope of the present invention is not limited to the content in the description. Those skilled in the art can make various deformations and modifications to the embodiments without departing from the technical idea of the present invention, and these deformations and modifications are all It should fall within the scope of the present invention.

Claims

A display panel, including a display area, a light-transmitting area, and an annular area, the display area surrounds the annular area, the annular area surrounds the light-transmitting area, and the display area includes:

Substrate

The first inorganic layer is provided on the substrate;

The organic laminate is provided on the side of the inorganic layer away from the substrate;

The organic light-emitting layer is arranged on the side of the organic stack away from the inorganic layer;

The thin film encapsulation layer is arranged on the side of the organic light-emitting layer away from the organic stack;

Wherein, the light-transmitting area can allow light to penetrate the display panel; the annular area is formed on the first inorganic layer and is covered by the thin film encapsulation layer.
The display panel of claim 1, wherein:

In the annular zone, the first inorganic layer is provided with at least one groove, and the groove is directly covered by the thin film encapsulation layer.
The display panel according to claim 2, wherein:

In the annular region, the first inorganic layer is formed with at least one dam, the dam is located on one side of the groove and close to the light-transmitting area, and the thin film encapsulation layer covers the dam.
The display panel of claim 3, wherein:

The thin film packaging layer includes:

The second inorganic layer is provided on the side of the organic light-emitting layer away from the organic stack;

The first organic layer is provided on the side of the second inorganic layer away from the organic light-emitting layer;

The third inorganic layer is arranged on the side of the first organic layer away from the second inorganic layer.
The display panel according to claim 2, wherein:

The light-transmitting area is a through hole, and the through hole penetrates the display panel;

The organic stack includes at least three second organic layers.
The display panel of claim 4, wherein:

The second inorganic layer and the third inorganic layer are sequentially formed on the dam.
The display panel according to claim 6, wherein:

In the annular zone, the first inorganic layer is further provided with another groove and another dam, and the second inorganic layer and the second dam are sequentially formed on the other groove and the other dam. The third inorganic layer.
The display panel of claim 5, wherein:

The cross section of the groove is a trapezoid with a narrow top and a wide bottom;

The groove includes a groove bottom and a peripheral wall surrounding the groove bottom;

The distance from the bottom of the groove to the substrate is 10 nm to 500 nm;

The through hole is a cylinder with a side wall;

The shortest distance from the groove to the side wall is 10um-200um.
The display panel of claim 3, wherein:

The second inorganic layer and the third inorganic layer are formed by a vapor deposition method;

The material of the first organic layer to form the first inorganic layer, the second inorganic layer, and the third inorganic layer by an inkjet printing method is silicon oxide with a water and oxygen barrier.
A display device, comprising the display panel according to claim 1, and the display device further comprising a camera module, the camera module being arranged under the light-transmitting area.
A display device comprising the display panel according to claim 2, the display device further comprising a camera module, the camera module being arranged under the light-transmitting area.
A display device, comprising the display panel of claim 3, the display device further comprising a camera module, the camera module being arranged under the light-transmitting area.