CN111510520B

CN111510520B - Display panel, manufacturing method thereof and display device

Info

Publication number: CN111510520B
Application number: CN201910100154.0A
Authority: CN
Inventors: 高静; 张林涛
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2019-01-31
Filing date: 2019-01-31
Publication date: 2021-06-29
Anticipated expiration: 2039-01-31
Also published as: CN111510520A

Abstract

The disclosure relates to a display panel, which includes a first display area and a second display area, wherein the light transmittance of the first display area is greater than that of the second display area; the display panel further includes: the polaroid is internally provided with a through hole at a position corresponding to the first display area; and the bonding layer is arranged on the polarizer and filled in the through hole. According to the embodiment of the disclosure, since the through hole is arranged inside the polarizer and the through hole is not communicated with the external environment of the polarizer on the plane where the polarizer is located, when air in the gap is extracted through a defoaming process, the air in the external environment does not enter the gap, and the air in the gap can be extracted quickly and effectively to eliminate or reduce the gap.

Description

Display panel, manufacturing method thereof and display device

Technical Field

The present disclosure relates to the field of display technologies, and in particular, to a display panel, a display device, and a method for manufacturing the display panel.

Background

With the improvement of the requirement of the user on the display effect of the mobile phone, mobile phone manufacturers continuously improve the area proportion of the screen on the front side of the mobile phone to meet the requirements of the user.

However, due to the existence of the front camera, in order to arrange the front camera on the front face of the mobile phone, the area ratio of the screen on the front face of the mobile phone is inevitably influenced.

Disclosure of Invention

The present disclosure provides a display panel, a display device and a method for manufacturing the display panel to solve the disadvantages of the related art.

According to a first aspect of the embodiments of the present disclosure, a display panel is provided, which includes a first display area and a second display area, wherein a light transmittance of the first display area is greater than a light transmittance of the second display area;

the display panel further includes:

the polaroid is internally provided with a through hole at a position corresponding to the first display area;

and the bonding layer is arranged on the polarizer and filled in the through hole.

Optionally, the adhesive layer comprises an adhesive.

Optionally, the bonding layer comprises:

a planarization layer disposed on the polarizer and filled in the through hole;

an adhesive disposed on the planarization layer.

Optionally, the material of the binder comprises at least one of:

OCA glue, water glue and tetrafluoroethylene.

Optionally, the adhesive has a refractive index equal to that of the polarizer.

Optionally, the minimum distance between the through hole and the first edge of the polarizer is greater than or equal to a first preset distance.

Optionally, the first preset distance is equal to 1 mm.

According to a second aspect of the embodiments of the present disclosure, a display device is provided, which includes the display panel of any of the embodiments, and further includes:

and the image acquisition equipment is arranged below the first display area.

Optionally, the through hole corresponds to the image capturing device in position, and the through hole and the image capturing device have the same field angle shape and the same area.

According to a third aspect of the embodiments of the present disclosure, a method for manufacturing a display panel is provided, including:

arranging a through hole in the polarizer, wherein the minimum distance between the through hole and the first edge of the polarizer is greater than or equal to a second preset distance;

attaching the polarizer on a display panel, wherein the display panel comprises a first display area and a second display area, the light transmittance of the first display area is greater than that of the second display area, and the position of the through hole corresponds to that of the first display area;

removing the polaroid with a preset width from the first edge, so that the distance between the through hole and the first edge is smaller than a second preset distance and is greater than or equal to a first preset distance;

bonding layers are arranged on the polaroids and in the through holes;

and defoaming the bonding layer.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

according to the embodiment, the through hole is formed in the position, corresponding to the first display area, in the polaroid, the position, corresponding to the through hole, in the first display area can have higher light transmittance, and therefore when the image acquisition equipment is arranged below the first display area, the image acquisition equipment can be arranged below the through hole, so that the effect that the image acquisition equipment acquires the front image of the display panel through the through hole is guaranteed.

And because the through-hole sets up in the inside of polaroid, under this condition, carry out the deaeration to the clearance between the lateral wall of binder and through-hole and handle, because the through-hole is not communicated with the external environment of polaroid on the plane that the polaroid is located, the air in the clearance is limited, when taking out the air in the clearance through the deaeration technology, the air in the external environment can not get into the clearance, can be fast and effectively take out the air in the clearance, in order to eliminate or reduce the clearance, be favorable to avoiding the clearance to influence the light path of display panel outgoing light and the light path of the light of penetrating into the display panel, and then guarantee that the display effect of first display area preferred and the image acquisition equipment who sets up below first display area have good effect of gathering the image.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic structural diagram illustrating a display panel according to an embodiment of the present disclosure.

Fig. 2 is a schematic cross-sectional view of a related art display panel along LL'.

Fig. 3 is a partially enlarged view of the display panel shown in fig. 1.

Fig. 4 is a schematic cross-sectional view of the display panel shown in fig. 3 taken along LL'.

Fig. 5 is a schematic cross-sectional view of another display panel shown in accordance with an embodiment of the present disclosure.

Fig. 6 is a schematic flow chart illustrating a method of fabricating a display panel according to an embodiment of the present disclosure.

Fig. 7 is a schematic diagram illustrating a via and a first edge according to an embodiment of the disclosure.

Fig. 8 is a schematic view illustrating a polarizer with a predetermined width removed according to an embodiment of the present disclosure.

Fig. 9 is a schematic block diagram illustrating an electronic device in accordance with an embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

Fig. 1 is a schematic structural diagram illustrating a display panel according to an embodiment of the present disclosure. The display panel in the embodiment of the present disclosure may be provided in an electronic device having a display function, such as a mobile phone, a tablet computer, a personal computer, and the like.

As shown in fig. 1, the display panel includes a first display area a and a second display area B, where a Light transmittance of the first display area is greater than a Light transmittance of the second display area, for example, the first display area may be an Organic Light-Emitting Diode (OLED) display panel, and based on this structure, an image capture device (for example, a front camera that can be used as a mobile phone) may be disposed on one side of the first display area (for example, below the first display area), and the image capture device may capture an image of the front side of the display panel through the display panel.

Wherein the first display area is not limited to one area nor one type of area. The second display area is not limited to one area nor to a class of areas.

As shown in fig. 2, in the related art, a polarizer may be disposed on a display substrate, and in order to make the first display region have high light transmittance, a portion of the polarizer corresponding to the first display region is removed to form a missing region, and then an adhesive is applied to the polarizer to adhere Cover Glass (CG).

However, when the adhesive is applied to the polarizer, a portion of the adhesive is not vertically applied to the polarizer, which results in the adhesive not completely contacting the sidewalls of the missing region of the polarizer, thereby causing a gap between the adhesive and the sidewalls of the missing region in the missing region.

The refractive index of the gap is greatly different from the refractive indexes of the adhesive and the polaroid, so that the light path of emergent rays of the display panel is influenced, and the display effect is further influenced; the light path of the light rays entering the display panel can be influenced, and the image acquisition equipment is further influenced to have a good image acquisition effect. Therefore, it is necessary to remove or reduce the gap by extracting air in the gap through a defoaming process.

The missing area in the related art is the same as the first display area in shape, for example, U-shaped, and communicates with the external environment of the polarizer on the plane where the polarizer is located, and there is air in the external environment, and when the air in the gap is pumped out through the defoaming process, the air in the external environment enters the gap, which seriously affects the efficiency of the defoaming process.

Fig. 3 is a partially enlarged view of the display panel shown in fig. 1. Fig. 4 is a schematic cross-sectional view of the display panel shown in fig. 3 taken along LL'. As shown in fig. 3 and 4, the display panel further includes:

the display device comprises a polaroid 1, wherein a through hole 10 is formed in the position, corresponding to the first display area, in the polaroid 1;

and the bonding layer 2 is arranged on the polarizer 1 and is filled in the through hole 10.

In one embodiment, as shown in fig. 4, the display panel may further include a display substrate 3, and the display substrate 3 may include an organic light emitting diode, a transistor for driving the organic light emitting diode to emit light, and the like. Cover glass 4 can be arranged on the bonding layer 2, and the cover glass 4 is bonded on the polarizer 1 through the bonding layer 2.

It should be noted that the shape of the through hole is not limited to the circular shape shown in fig. 3, and may be provided in other shapes such as a rectangular shape, an oval shape, and the like as needed.

In one embodiment, the through hole is disposed in a position corresponding to the first display region inside the polarizer (for example, as shown in fig. 3, the through hole 10 is located in the first display region a), so that the position corresponding to the through hole in the first display region has a higher light transmittance, and when the image capturing device is disposed below the first display region, the image capturing device may be disposed below the through hole, so as to ensure an effect that the image capturing device captures an image on the front surface of the display panel through the through hole.

Optionally, the adhesive layer comprises an adhesive.

Alternatively, as shown in fig. 5, the adhesive layer includes:

a planarization layer 21 disposed on the polarizer 1 and filled in the through hole 10;

and an adhesive 22 disposed on the planarization layer 21.

In one embodiment, the bonding layer can be made as a layer structure including only the adhesive in the manner shown in fig. 4, and the process flow steps are fewer and easy to implement. However, since the adhesive needs to be filled in the through-hole, the adhesive layer may not be flat at the position of the through-hole.

In an embodiment, the bonding layer may be made into a two-layer structure composed of a flat layer and a bonding agent in a manner shown in fig. 5, because the flat layer can perform a planarization function, a flat surface may be provided to set the bonding agent, thereby ensuring that the bonding agent is also flat, and compared with the structure in which a layer of bonding agent is separately provided in fig. 4, it may be ensured that the bonding layer is flat at the position of the through hole, which is beneficial to preventing the uneven bonding layer from affecting the light path of the emergent light of the display panel and the light path of the light incident into the display panel, thereby ensuring that the first display area has a better display effect and the image acquisition device disposed below the first display area has a good image acquisition effect.

Optionally, the material of the binder comprises at least one of:

OCA glue, water glue and tetrafluoroethylene.

In an embodiment, the material of the adhesive can be selected as required, and a material with relatively high light transmittance can be selected as the adhesive, for example, the light transmittance is greater than 90%, so as to ensure that light can enter the image acquisition device below the through hole through the through hole as much as possible, and achieve a better image acquisition effect of the image acquisition device.

Optionally, the adhesive has a refractive index equal to that of the polarizer.

In one embodiment, a material having a refractive index equal to that of the polarizer may be selected as the adhesive, so that the refractive index of each position of the plane where the polarizer is located is the same, and when light passes through the polarizer in the first display region, the light is prevented from being refracted at the position where the polarizer and the adhesive are located, and thus, the light path is prevented from being changed when the light passes through the first display region, which is beneficial to ensuring that the first display region has a better display effect and the image acquisition device disposed below the first display region has a good image acquisition effect.

In one embodiment, since the through hole is formed through an area in the polarizer, which relates to a process of cutting the polarizer from the inside of the polarizer, if the through hole is closer to a first edge of the polarizer (e.g., a short side of the polarizer on the side of the first display area a shown in fig. 1), which may cause the polarizer to be broken during the cutting process, the through hole may be formed by performing the cutting process at a position having a minimum distance from the first edge greater than or equal to a first predetermined distance, so as to prevent the polarizer from being broken during the cutting process.

Optionally, the first preset distance is equal to 1 mm.

In one embodiment, the first predetermined distance may be equal to 1 mm, or may be set as needed, for example, the material of the polarizer is not easily broken, the first predetermined distance may be set to be smaller, for example, the polarizer is easily broken, and the first predetermined distance may be set to be larger.

An embodiment of the present disclosure further provides a display device, including the display panel according to any one of the above embodiments, further including:

and the image acquisition equipment is arranged below the first display area.

In one embodiment, because the light transmittance of the first display area is greater than that of the second display area, a large amount of light can penetrate through the first display area to enter the image acquisition equipment, so that the image acquisition equipment can acquire clear images, and the image acquisition equipment is favorably ensured to have a good image acquisition effect.

In one embodiment, for example, the display device is a screen in a mobile phone, the image capture device may be a front camera of the mobile phone, and the image capture device may capture an image of the front side of the display panel through the display panel.

In one embodiment, the shape and the area of the field angle of the image acquisition device on the plane where the polarizer is located may be determined first, and the through hole is formed in the polarizer according to the shape and the area, so that the shape of the field angle of the through hole is the same as that of the image acquisition device, and the areas are equal, thereby the polarizer may be cut off as little as possible, damage to the polarizer is reduced, it is also ensured that the polarizer does not shield the field angle of the image acquisition device, the image acquisition device is enabled to acquire clear images, and it is beneficial to ensuring that the image acquisition device has a good image acquisition effect.

Fig. 6 is a schematic flow chart illustrating a method of fabricating a display panel according to an embodiment of the present disclosure. Fig. 7 is a schematic diagram illustrating a via and a first edge according to an embodiment of the disclosure. Fig. 8 is a schematic view illustrating a polarizer with a predetermined width removed according to an embodiment of the present disclosure.

As shown in fig. 6, an embodiment of the present disclosure provides a method for manufacturing a display panel, including:

in step S1, a through hole is formed inside the polarizer, wherein a minimum distance between the through hole and the first edge of the polarizer is greater than or equal to a second preset distance;

in step S2, attaching the polarizer to a display panel, where the display panel includes a first display area and a second display area, a light transmittance of the first display area is greater than a light transmittance of the second display area, and the through hole is located corresponding to the first display area;

in step S3, removing the polarizer with a predetermined width from the first edge, so that the distance between the through hole and the first edge is less than a second predetermined distance and greater than or equal to a first predetermined distance;

in step S4, providing adhesive layers on the polarizer and in the through-hole;

in step S5, the adhesive layer is subjected to defoaming processing.

In one embodiment, as shown in fig. 7, in order to avoid the polarizer from being broken when the polarizer is cut from the inside of the polarizer to form the through hole, the through hole 10 may be formed by performing a cutting process at a position farther from the first edge L1 of the polarizer, that is, at a position where the minimum distance is greater than or equal to the second predetermined distance d2, in which case, the area of the polarizer may be larger than that of the display panel, for example, the long side of the polarizer shown in fig. 7 is longer than the long side of the display panel, and the short side of the polarizer is equal to the short side of the display panel.

Further, in the subsequent process, as shown in fig. 8, a polarizer with a predetermined width may be removed from the first edge, for example, a region surrounded by the original first edge L1 and the new first edge L1' in fig. 8, so that the distance between the through hole 10 and the first edge is less than the second predetermined distance d2 and greater than or equal to the first predetermined distance d 1.

Accordingly, the through hole can be close to the first edge (for example, L' shown in fig. 8), and the position of the first through hole corresponds to the position of the first display area, so that the first display area can be set to be close to the first edge, thereby preventing the first display area from excessively penetrating into the second display area to affect the display effect of the second display area, and being beneficial to ensuring that the second display area has a good display effect.

Fig. 9 is a schematic block diagram illustrating an electronic device 900 in accordance with an embodiment of the disclosure. For example, the apparatus 900 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and the like.

Referring to fig. 9, apparatus 900 may include one or more of the following components: processing component 902, memory 904, power component 906, multimedia component 908, audio component 910, input/output (I/O) interface 912, sensor component 914, and communication component 916. The display panel of any one of the above embodiments may also be included.

The processing component 902 generally controls overall operation of the device 900, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. Processing component 902 may include one or more processors 920 to execute instructions. Further, processing component 902 can include one or more modules that facilitate interaction between processing component 902 and other components. For example, the processing component 902 can include a multimedia module to facilitate interaction between the multimedia component 908 and the processing component 902.

The memory 904 is configured to store various types of data to support operation at the apparatus 900. Examples of such data include instructions for any application or method operating on device 900, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 904 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

The power supply component 906 provides power to the various components of the device 900. The power components 906 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the device 900.

The multimedia component 908 comprises a screen providing an output interface between the device 900 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 908 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the device 900 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 910 is configured to output and/or input audio signals. For example, audio component 910 includes a Microphone (MIC) configured to receive external audio signals when apparatus 900 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 904 or transmitted via the communication component 916. In some embodiments, audio component 910 also includes a speaker for outputting audio signals.

I/O interface 912 provides an interface between processing component 902 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor component 914 includes one or more sensors for providing status assessment of various aspects of the apparatus 900. For example, sensor assembly 914 may detect an open/closed state of device 900, the relative positioning of components, such as a display and keypad of device 900, the change in position of device 900 or a component of device 900, the presence or absence of user contact with device 900, the orientation or acceleration/deceleration of device 900, and the change in temperature of device 900. The sensor assembly 914 may include a proximity sensor configured to detect the presence of a nearby object in the absence of any physical contact. The sensor assembly 914 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 914 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 916 is configured to facilitate communications between the apparatus 900 and other devices in a wired or wireless manner. The apparatus 900 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, 4G LTE, 5G NR, or a combination thereof. In an exemplary embodiment, the communication component 916 receives a broadcast signal or broadcast associated information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 916 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

In an example embodiment, the apparatus 900 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic components.

In an exemplary embodiment, a non-transitory computer readable storage medium comprising instructions, such as the memory 904 comprising instructions, executable by the processor 920 of the apparatus 900 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. The display panel is characterized by comprising a first display area and a second display area, wherein the light transmittance of the first display area is greater than that of the second display area;

the display panel further includes:

the bonding layer is arranged on the polarizer and filled in the through hole;

wherein the bonding layer comprises:

a planarization layer disposed on the polarizer and filled in the through hole;

an adhesive disposed on the planarization layer.

2. The display panel of claim 1, wherein the material of the adhesive comprises at least one of:

OCA glue, water glue and tetrafluoroethylene.

3. The display panel according to claim 1, wherein the adhesive has a refractive index equal to that of the polarizer.

4. The display panel of claim 1, wherein the minimum distance between the through hole and the first edge of the polarizer is greater than or equal to a first predetermined distance.

5. The display panel according to claim 4, wherein the first predetermined distance is equal to 1 mm.

6. A display device characterized by comprising the display panel according to any one of claims 1 to 5, and further comprising:

and the image acquisition equipment is arranged below the first display area.

7. The display device according to claim 6, wherein the through hole is located corresponding to the image capturing apparatus, and the through hole has the same shape and area as the field angle of the image capturing apparatus.